Initial commit.

.gitignore

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+.qmake.stash
+moc_*
+qrc_*
+*.o
+Makefile
+qteletextmaker

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -0,0 +1,53 @@
+# QTeletextMaker
+QTeletextMaker is a teletext page editor in development. It is written in C++ using the Qt 5 widget libraries, and released under the GNU General Public License v3.0
+
+Features
+- Load and save teletext pages in .tti format.
+- Rendering of teletext pages in Levels 1, 1.5, 2.5 and 3.5
+- Rendering of Local Objects and side panels.
+- Interactive X/26 Local Enhancement Data triplet editor.
+- Palette editor.
+- Configurable zoom.
+- View teletext pages in 4:3, 16:9 pillar-box and 16:9 stretch aspect ratios.
+
+Although designed on and developed for Linux, the Qt 5 libraries are cross platform so hopefully it should be compilable on Windows. And maybe MacOS as well.
+
+## Building
+### Linux
+Install the QtCore, QtGui and QtWidgets libraries and build headers, along with the qmake tool. Then type `qmake && make -j3` in a terminal, you can replace -j3 with the number of processor cores used for the compile process.
+
+The above will place the qteletextmaker executable in the same directory as the source, type `./qteletextmaker` in the terminal to launch. Optionally, type `make install` afterwards to place the exectuable into /usr/local/bin.
+
+## Current limitations
+At the moment QTeletextMaker is in pre-alpha status so many features are not finished yet. The most-often encountered limitations are detailed here.
+
+Spacing attributes are only accessible through an "Insert" menu. A toolbar to insert spacing attributes may be added in the future.
+
+There is no visible widget for switching between subpages, use the PageUp and PageDown keys for this.
+
+Undo only undoes keypresses, insertion of spacing attributes and CLUT changes. Other changes can't be undone, nor will they cause the "unsaved page" dialog to appear if the editor window is closed.
+
+Keymapping between ASCII and Teletext character sets is not yet implemented e.g. in English pressing the hash key will type a pound sign instead, and in other languages the square and curly brackets keys need to be pressed to obtain the accented characters.
+
+The following X/26 enhancement triplets are not rendered by the editor, although the list is fully aware of them.
+- Invocation of Objects from POP and GPOP pages.
+- DRCS characters.
+- Modified G0 and G2 character set designation using X/26 triplets with mode 01000.
+- Full screen and full row colours set by Active Objects.
+- Level 3.5 font style: bold, italic and proportional spacing.
+
+## Using the X/26 triplet editor
+At present the editor only accepts raw triplet Address, Mode and Data numbers for input although the effects of the Triplet are shown in the list as a full description. The full behaviour of these enhancement triplets can be found in 
+section 12.3 of the [Enhanced Teletext specification ETS 300 706](https://web.archive.org/web/20160326062859/https://www.phecap.nl/download/enhenced-teletext-specs.pdf) but some hints and tips are below.
+
+### Address values
+Address values 0-39 select a Column Triplet and, with the exception of reserved and PDC Modes, set the column co-ordinate of the Active Position.
+
+Address values 40-63 select a Row Triplet which has a different set of modes. Modes 4 (Set Active Position) and 1 (Full Row Colour) will set the row co-ordinate of the Active Position to the Address value minus 40, except for Address value 40 which will set the row co-ordinate to 24.
+
+### Objects
+"Define ... Object" triplets need to declare that they are in the correct place in the triplet list e.g. if the Define Object triplet is at `d1 t3` in the list then the data field must show `Local: d1 t3`, otherwise the Object won't appear.
+
+Insert and deleting triplets from the list will upset the Object pointers on both "Define" and "Invoke" triplets and will need to be corrected afterwards. A future version of the editor may adjust these pointers automatically.
+
+"Invoke ... Object" triplets must point to a "Define ... Object" of the same type e.g. "Invoke *Active* Object" must point to a "Define *Active* Object", otherwise the Object won't appear.

document.cpp

@@ -0,0 +1,450 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QFile>
+#include <QTextStream>
+#include <vector>
+
+#include "document.h"
+
+#include "page.h"
+
+TeletextDocument::TeletextDocument()
+{
+	m_pageNumber = 0x198;
+	m_description.clear();
+	for (int i=0; i<6; i++)
+		m_fastTextLink[i] = 0x8ff;
+	m_empty = true;
+	m_subPages.push_back(new TeletextPage);
+	m_currentSubPageIndex = 0;
+	m_undoStack = new QUndoStack(this);
+	m_cursorRow = 1;
+	m_cursorColumn = 0;
+}
+
+TeletextDocument::~TeletextDocument()
+{
+	for (auto &subPage : m_subPages)
+		delete(subPage);
+}
+
+void TeletextDocument::loadDocument(QFile *inFile)
+{
+	QByteArray inLine;
+	bool firstSubPageFound = false;
+	int cycleCommandsFound = 0;
+	int mostRecentCycleValue = -1;
+	TeletextPage::CycleTypeEnum mostRecentCycleType;
+	
+	TeletextPage* loadingPage = m_subPages[0];
+
+	for (;;) {
+		inLine = inFile->readLine(160).trimmed();
+		if (inLine.isEmpty())
+			break;
+		if (inLine.startsWith("DE,"))
+			m_description = QString(inLine.remove(0, 3));
+		if (inLine.startsWith("PN,")) {
+			bool pageNumberOk;
+			int pageNumberRead = inLine.mid(3, 3).toInt(&pageNumberOk, 16);
+			if ((!pageNumberOk) || pageNumberRead < 0x100 || pageNumberRead > 0x8ff)
+				pageNumberRead = 0x199;
+			// When second and subsequent PN commands are found, firstSubPageFound==true at this point
+			// This assumes that PN is the first command of a new subpage...
+			if (firstSubPageFound) {
+				m_subPages.push_back(new TeletextPage);
+				loadingPage = m_subPages.back();
+			}
+			m_pageNumber = pageNumberRead;
+			firstSubPageFound = true;
+		}
+/*		if (lineType == "SC,") {
+			bool subPageNumberOk;
+			int subPageNumberRead = inLine.mid(3, 4).toInt(&subPageNumberOk, 16);
+			if ((!subPageNumberOk) || subPageNumberRead > 0x3f7f)
+				subPageNumberRead = 0;
+			loadingPage->setSubPageNumber(subPageNumberRead);
+		}*/
+		if (inLine.startsWith("PS,")) {
+			bool pageStatusOk;
+			int pageStatusRead = inLine.mid(3, 4).toInt(&pageStatusOk, 16);
+			if (pageStatusOk) {
+				loadingPage->setControlBit(0, pageStatusRead & 0x4000);
+				for (int i=1, pageStatusBit=0x0001; i<8; i++, pageStatusBit<<=1)
+					loadingPage->setControlBit(i, pageStatusRead & pageStatusBit);
+				loadingPage->setDefaultNOS(((pageStatusRead & 0x0200) >> 9) | ((pageStatusRead & 0x0100) >> 7) | ((pageStatusRead & 0x0080) >> 5));
+			}
+		}
+		if (inLine.startsWith("CT,") && (inLine.endsWith(",C") || inLine.endsWith(",T"))) {
+			bool cycleValueOk;
+			int cycleValueRead = inLine.mid(3, inLine.size()-5).toInt(&cycleValueOk);
+			if (cycleValueOk) {
+				cycleCommandsFound++;
+				// House-keep CT command values, in case it's the only one within multiple subpages
+				mostRecentCycleValue = cycleValueRead;
+				loadingPage->setCycleValue(cycleValueRead);
+				mostRecentCycleType = inLine.endsWith("C") ? TeletextPage::CTcycles : TeletextPage::CTseconds;
+				loadingPage->setCycleType(mostRecentCycleType);
+			}
+		}
+		if (inLine.startsWith("FL,")) {
+			bool fastTextLinkOk;
+			int fastTextLinkRead;
+			QString flLine = QString(inLine.remove(0, 3));
+			if (flLine.count(',') == 5)
+				for (int i=0; i<6; i++) {
+					fastTextLinkRead = flLine.section(',', i, i).toInt(&fastTextLinkOk, 16);
+					if (fastTextLinkOk)
+						m_fastTextLink[i] = fastTextLinkRead == 0 ? 0x8ff : fastTextLinkRead;
+				}
+		}
+		if (inLine.startsWith("OL,"))
+			loadingPage->loadPagePacket(inLine);
+	}
+	// If there's more than one subpage but only one valid CT command was found, apply it to all subpages
+	// I don't know if this is correct
+	if (cycleCommandsFound == 1 && m_subPages.size()>1)
+		for (auto &subPage : m_subPages) {
+			subPage->setCycleValue(mostRecentCycleValue);
+			subPage->setCycleType(mostRecentCycleType);
+		}
+	subPageSelected();
+}
+
+void TeletextDocument::saveDocument(QTextStream *outStream)
+{
+	if (!m_description.isEmpty())
+		*outStream << "DE," << m_description << endl;
+	//TODO DS and SP commands
+
+	int subPageNumber = m_subPages.size()>1;
+
+	for (auto &subPage : m_subPages) {
+		subPage->savePage(outStream, m_pageNumber, subPageNumber++);
+		if (m_fastTextLink[0] != 0x8ff) {
+			*outStream << "FL,";
+			for (int i=0; i<6; i++) {
+				*outStream << QString("%1").arg(m_fastTextLink[i], 3, 16, QChar('0'));
+				if (i<5)
+					*outStream << ',';
+			}
+			*outStream << endl;
+		}
+	}
+}
+
+void TeletextDocument::selectSubPageIndex(int newSubPageIndex, bool forceRefresh)
+{
+	// forceRefresh overrides "beyond the last subpage" check, so inserting a subpage after the last one still shows - dangerous workaround?
+	if (forceRefresh || (newSubPageIndex != m_currentSubPageIndex && newSubPageIndex < m_subPages.size()-1)) {
+		emit aboutToChangeSubPage();
+		m_currentSubPageIndex = newSubPageIndex;
+		emit subPageSelected();
+		return;
+	}
+}
+
+void TeletextDocument::selectSubPageNext()
+{
+	if (m_currentSubPageIndex < m_subPages.size()-1) {
+		emit aboutToChangeSubPage();
+		m_currentSubPageIndex++;
+		emit subPageSelected();
+	}
+}
+
+void TeletextDocument::selectSubPagePrevious()
+{
+	if (m_currentSubPageIndex > 0) {
+		emit aboutToChangeSubPage();
+		m_currentSubPageIndex--;
+		emit subPageSelected();
+	}
+}
+
+void TeletextDocument::insertSubPage(int beforeSubPageIndex, bool copySubPage)
+{
+	TeletextPage *insertedSubPage;
+
+	if (copySubPage)
+		insertedSubPage = new TeletextPage(*m_subPages.at(beforeSubPageIndex));
+	else
+		insertedSubPage = new TeletextPage;
+	if (beforeSubPageIndex == m_subPages.size())
+		m_subPages.push_back(insertedSubPage);
+	else
+		m_subPages.insert(m_subPages.begin()+beforeSubPageIndex, insertedSubPage);
+}
+
+void TeletextDocument::deleteSubPage(int subPageToDelete)
+{
+	delete(m_subPages[subPageToDelete]);
+	m_subPages.erase(m_subPages.begin()+subPageToDelete);
+}
+
+void TeletextDocument::setPageNumber(QString newPageNumberString)
+{
+	// The LineEdit should check if a valid hex number was entered, but just in case...
+	bool newPageNumberOk;
+	int newPageNumberRead = newPageNumberString.toInt(&newPageNumberOk, 16);
+	if (newPageNumberOk && newPageNumberRead >= 0x100 && newPageNumberRead <= 0x8fe)
+		m_pageNumber = newPageNumberRead;
+}
+
+void TeletextDocument::setDescription(QString newDescription)
+{
+	m_description = newDescription;
+}
+
+void TeletextDocument::setFastTextLink(int linkNumber, QString newPageNumberString)
+{
+	// The LineEdit should check if a valid hex number was entered, but just in case...
+	bool newPageNumberOk;
+	int newPageNumberRead = newPageNumberString.toInt(&newPageNumberOk, 16);
+	if (newPageNumberOk && newPageNumberRead >= 0x100 && newPageNumberRead <= 0x8ff)
+		m_fastTextLink[linkNumber] = newPageNumberRead;
+}
+
+void TeletextDocument::cursorUp()
+{
+	if (--m_cursorRow == 0)
+		m_cursorRow = 24;
+	emit cursorMoved();
+}
+
+void TeletextDocument::cursorDown()
+{
+	if (++m_cursorRow == 25)
+		m_cursorRow = 1;
+	emit cursorMoved();
+}
+
+void TeletextDocument::cursorLeft()
+{
+	if (--m_cursorColumn == -1) {
+		m_cursorColumn = 39;
+		cursorUp();
+	}
+	emit cursorMoved();
+}
+
+void TeletextDocument::cursorRight()
+{
+	if (++m_cursorColumn == 40) {
+		m_cursorColumn = 0;
+		cursorDown();
+	}
+	emit cursorMoved();
+}
+
+void TeletextDocument::moveCursor(int newCursorRow, int newCursorColumn)
+{
+	m_cursorRow = newCursorRow;
+	m_cursorColumn = newCursorColumn;
+	emit cursorMoved();
+}
+
+
+OverwriteCharacterCommand::OverwriteCharacterCommand(TeletextDocument *teletextDocument, unsigned char newCharacter, QUndoCommand *parent) : QUndoCommand(parent)
+{
+	m_teletextDocument = teletextDocument;
+	m_subPageIndex = teletextDocument->currentSubPageIndex();
+	m_row = teletextDocument->cursorRow();
+	m_column = teletextDocument->cursorColumn();
+	m_oldCharacter = teletextDocument->currentSubPage()->character(m_row, m_column);
+	m_newCharacter = newCharacter;
+}
+
+void OverwriteCharacterCommand::undo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	m_teletextDocument->currentSubPage()->setCharacter(m_row, m_column, m_oldCharacter);
+	m_teletextDocument->moveCursor(m_row, m_column);
+	setText(QObject::tr("overwrite char"));
+	emit m_teletextDocument->contentsChange(m_row);
+}
+
+void OverwriteCharacterCommand::redo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	m_teletextDocument->currentSubPage()->setCharacter(m_row, m_column, m_newCharacter);
+	m_teletextDocument->moveCursor(m_row, m_column);
+	m_teletextDocument->cursorRight();
+	setText(QObject::tr("overwrite char"));
+	emit m_teletextDocument->contentsChange(m_row);
+}
+
+
+ToggleMosaicBitCommand::ToggleMosaicBitCommand(TeletextDocument *teletextDocument, unsigned char bitToToggle, QUndoCommand *parent) : QUndoCommand(parent)
+{
+	m_teletextDocument = teletextDocument;
+	m_subPageIndex = teletextDocument->currentSubPageIndex();
+	m_row = teletextDocument->cursorRow();
+	m_column = teletextDocument->cursorColumn();
+	m_oldCharacter = teletextDocument->currentSubPage()->character(m_row, m_column);
+	if (bitToToggle == 0x20 || bitToToggle == 0x7f)
+		m_newCharacter = bitToToggle;
+	else
+		m_newCharacter = m_oldCharacter ^ bitToToggle;
+}
+
+void ToggleMosaicBitCommand::undo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	m_teletextDocument->currentSubPage()->setCharacter(m_row, m_column, m_oldCharacter);
+	m_teletextDocument->moveCursor(m_row, m_column);
+	setText(QObject::tr("mosaic"));
+	emit m_teletextDocument->contentsChange(m_row);
+}
+
+void ToggleMosaicBitCommand::redo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	m_teletextDocument->currentSubPage()->setCharacter(m_row, m_column, m_newCharacter);
+	m_teletextDocument->moveCursor(m_row, m_column);
+	setText(QObject::tr("mosaic"));
+	emit m_teletextDocument->contentsChange(m_row);
+}
+
+bool ToggleMosaicBitCommand::mergeWith(const QUndoCommand *command)
+{
+	const ToggleMosaicBitCommand *previousCommand = static_cast<const ToggleMosaicBitCommand *>(command);
+
+	if (m_subPageIndex != previousCommand->m_subPageIndex || m_row != previousCommand->m_row || m_column != previousCommand->m_column)
+		return false;
+	m_newCharacter = previousCommand->m_newCharacter;
+	return true;
+}
+
+BackspaceCommand::BackspaceCommand(TeletextDocument *teletextDocument, QUndoCommand *parent) : QUndoCommand(parent)
+{
+	m_teletextDocument = teletextDocument;
+	m_subPageIndex = teletextDocument->currentSubPageIndex();
+	m_row = teletextDocument->cursorRow();
+	m_column = teletextDocument->cursorColumn()-1;
+	if (m_column == -1) {
+		m_column = 39;
+		if (--m_row == 0)
+			m_row = 24;
+	}
+	m_deletedCharacter = teletextDocument->currentSubPage()->character(m_row, m_column);
+}
+
+void BackspaceCommand::undo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	m_teletextDocument->currentSubPage()->setCharacter(m_row, m_column, m_deletedCharacter);
+	m_teletextDocument->moveCursor(m_row, m_column);
+	m_teletextDocument->cursorRight();
+	setText(QObject::tr("backspace"));
+	emit m_teletextDocument->contentsChange(m_row);
+}
+
+void BackspaceCommand::redo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	m_teletextDocument->currentSubPage()->setCharacter(m_row, m_column, 0x20);
+	m_teletextDocument->moveCursor(m_row, m_column);
+	setText(QObject::tr("backspace"));
+	emit m_teletextDocument->contentsChange(m_row);
+}
+
+
+InsertSubPageCommand::InsertSubPageCommand(TeletextDocument *teletextDocument, bool afterCurrentSubPage, bool copySubPage, QUndoCommand *parent) : QUndoCommand(parent)
+{
+	m_teletextDocument = teletextDocument;
+	m_newSubPageIndex = teletextDocument->currentSubPageIndex()+afterCurrentSubPage;
+	m_copySubPage = copySubPage;
+}
+
+void InsertSubPageCommand::undo()
+{
+	m_teletextDocument->deleteSubPage(m_newSubPageIndex);
+	//TODO should we always wrench to "subpage viewed when we inserted"? Or just if subpage viewed is being deleted?
+	m_teletextDocument->selectSubPageIndex(m_newSubPageIndex, true);
+	setText(QObject::tr("insert subpage"));
+}
+
+void InsertSubPageCommand::redo()
+{
+	m_teletextDocument->insertSubPage(m_newSubPageIndex, m_copySubPage);
+	m_teletextDocument->selectSubPageIndex(m_newSubPageIndex, true);
+	setText(QObject::tr("insert subpage"));
+}
+
+
+SetColourCommand::SetColourCommand(TeletextDocument *teletextDocument, int colourIndex, int newColour, QUndoCommand *parent) : QUndoCommand(parent)
+{
+	m_teletextDocument = teletextDocument;
+	m_subPageIndex = teletextDocument->currentSubPageIndex();
+	m_colourIndex = colourIndex;
+	m_oldColour = teletextDocument->currentSubPage()->CLUT(colourIndex);
+	m_newColour = newColour;
+}
+
+void SetColourCommand::undo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	m_teletextDocument->currentSubPage()->setCLUT(m_colourIndex, m_oldColour);
+	emit m_teletextDocument->colourChanged(m_colourIndex);
+	setText(QObject::tr("colour change"));
+	emit m_teletextDocument->refreshNeeded();
+}
+
+void SetColourCommand::redo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	m_teletextDocument->currentSubPage()->setCLUT(m_colourIndex, m_newColour);
+	emit m_teletextDocument->colourChanged(m_colourIndex);
+	setText(QObject::tr("colour change"));
+	emit m_teletextDocument->refreshNeeded();
+}
+
+
+ResetCLUTCommand::ResetCLUTCommand(TeletextDocument *teletextDocument, int colourTable, QUndoCommand *parent) : QUndoCommand(parent)
+{
+	m_teletextDocument = teletextDocument;
+	m_subPageIndex = teletextDocument->currentSubPageIndex();
+	m_colourTable = colourTable;
+	for (int i=m_colourTable*8; i<m_colourTable*8+8; i++)
+		m_oldColourEntry[i&7] = teletextDocument->currentSubPage()->CLUT(i);
+}
+
+void ResetCLUTCommand::undo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	for (int i=m_colourTable*8; i<m_colourTable*8+8; i++) {
+		m_teletextDocument->currentSubPage()->setCLUT(i, m_oldColourEntry[i&7]);
+		emit m_teletextDocument->colourChanged(i);
+	}
+	setText(QObject::tr("CLUT %1 reset").arg(m_colourTable));
+	emit m_teletextDocument->refreshNeeded();
+}
+
+void ResetCLUTCommand::redo()
+{
+	m_teletextDocument->selectSubPageIndex(m_subPageIndex);
+	for (int i=m_colourTable*8; i<m_colourTable*8+8; i++) {
+		m_teletextDocument->currentSubPage()->setCLUT(i, m_teletextDocument->currentSubPage()->CLUT(i, 0));
+		emit m_teletextDocument->colourChanged(i);
+	}
+	setText(QObject::tr("CLUT %1 reset").arg(m_colourTable));
+	emit m_teletextDocument->refreshNeeded();
+}

document.h

@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DOCUMENT_H
+#define DOCUMENT_H
+
+#include <QFile>
+#include <QObject>
+#include <QTextStream>
+#include <QUndoCommand>
+#include <QUndoStack>
+#include <vector>
+#include "document.h"
+#include "page.h"
+
+class TeletextDocument : public QObject
+{
+	Q_OBJECT
+
+public:
+	TeletextDocument();
+	~TeletextDocument();
+	bool isEmpty() const { return m_empty; }
+	void setModified(bool);
+	void loadDocument(QFile *);
+	void saveDocument(QTextStream *);
+	int numberOfSubPages() const { return m_subPages.size(); }
+	TeletextPage* currentSubPage() const { return m_subPages[m_currentSubPageIndex]; }
+	int currentSubPageIndex() const { return m_currentSubPageIndex; }
+	void selectSubPageIndex(int, bool=false);
+	void selectSubPageNext();
+	void selectSubPagePrevious();
+	void insertSubPage(int, bool);
+	void deleteSubPage(int);
+	int pageNumber() const { return m_pageNumber; }
+	void setPageNumber(QString);
+	QString description() const { return m_description; }
+	void setDescription(QString);
+	int fastTextLink(int linkNumber) const { return m_fastTextLink[linkNumber]; }
+	void setFastTextLink(int, QString);
+	QUndoStack *undoStack() const { return m_undoStack; }
+	int cursorRow() const { return m_cursorRow; }
+	int cursorColumn() const { return m_cursorColumn; }
+	void cursorUp();
+	void cursorDown();
+	void cursorLeft();
+	void cursorRight();
+	void moveCursor(int, int);
+
+signals:
+	void cursorMoved();
+	void colourChanged(int);
+	void contentsChange(int);
+	void aboutToChangeSubPage();
+	void subPageSelected();
+	void refreshNeeded();
+
+private:
+	QString m_description;
+	bool m_empty;
+	int m_pageNumber, m_currentSubPageIndex;
+	int m_fastTextLink[6];
+	std::vector<TeletextPage *> m_subPages;
+	QUndoStack *m_undoStack;
+	int m_cursorRow, m_cursorColumn;
+};
+
+
+class OverwriteCharacterCommand : public QUndoCommand
+{
+public:
+//	enum { Id = 1 };
+
+	OverwriteCharacterCommand(TeletextDocument *, unsigned char, QUndoCommand *parent = 0);
+
+	void undo() override;
+	void redo() override;
+//	int id() const override { return Id; }
+
+private:
+	TeletextDocument *m_teletextDocument;
+	unsigned char m_oldCharacter, m_newCharacter;
+	int m_subPageIndex, m_row, m_column;
+};
+
+class ToggleMosaicBitCommand : public QUndoCommand
+{
+public:
+	enum { Id = 2 };
+
+	ToggleMosaicBitCommand(TeletextDocument *, unsigned char, QUndoCommand *parent = 0);
+
+	void undo() override;
+	void redo() override;
+	bool mergeWith(const QUndoCommand *) override;
+	int id() const override { return Id; }
+
+private:
+	TeletextDocument *m_teletextDocument;
+	unsigned char m_oldCharacter, m_newCharacter;
+	int m_subPageIndex, m_row, m_column;
+};
+
+class BackspaceCommand : public QUndoCommand
+{
+public:
+//	enum { Id = 3 };
+
+	BackspaceCommand(TeletextDocument *, QUndoCommand *parent = 0);
+
+	void undo() override;
+	void redo() override;
+//	int id() const override { return Id; }
+
+private:
+	TeletextDocument *m_teletextDocument;
+	unsigned char m_deletedCharacter;
+	int m_subPageIndex, m_row, m_column;
+};
+
+class InsertSubPageCommand : public QUndoCommand
+{
+public:
+	InsertSubPageCommand(TeletextDocument *, bool, bool, QUndoCommand *parent = 0);
+
+	void undo() override;
+	void redo() override;
+
+private:
+	TeletextDocument *m_teletextDocument;
+	int m_newSubPageIndex;
+	bool m_copySubPage;
+};
+
+class SetColourCommand : public QUndoCommand
+{
+public:
+	SetColourCommand(TeletextDocument *, int, int, QUndoCommand *parent = 0);
+
+	void undo() override;
+	void redo() override;
+
+private:
+	TeletextDocument *m_teletextDocument;
+	int m_subPageIndex, m_colourIndex, m_oldColour, m_newColour;
+};
+
+class ResetCLUTCommand : public QUndoCommand
+{
+public:
+	ResetCLUTCommand(TeletextDocument *, int, QUndoCommand *parent = 0);
+
+	void undo() override;
+	void redo() override;
+
+private:
+	TeletextDocument *m_teletextDocument;
+	int m_subPageIndex, m_colourTable;
+	int m_oldColourEntry[8];
+};
+#endif

examples/Objects-32Shades.tti

@@ -0,0 +1,18 @@
+DE,32 shades of grey
+PN,12900
+SC,0000
+PS,8000
+CT,8,T
+OL,28,@@@|g@@PDaHrLCQTUeYv]GbXfijznKs\wm{~O@@
+OL,26,@nd@hQHod@hQHpd@hQHqd@hQRrd@hQRsd@hQR_C
+OL,26,AxUH@@HB`HD@IF`IH@JJ`JL@KN`KP@LR`LT@MV`M
+OL,26,BX@NZ`N\@O^`OxUR@CHA`HAkWCCICkWE`IEkWGCJ
+OL,26,CGkWI`JIkWKCKKkWM`KMkWOCLOkWQ`LQkWSCMSkW
+OL,26,DU`MUkWWCNWkWY`NYkW[CO[kW]`O]kWCCC
+OL,4, 0 1 2 3 4 5 6 7 8 9 a b c d e f        
+OL,6,T        
+OL,7,T        
+OL,8,T        
+OL,9,T                       \       
+OL,10,T                       \       
+OL,11,T                       \       

examples/Objects-528Shades.tti

@@ -0,0 +1,104 @@
+DE,528 shades of colour
+PN,12801
+SC,0001
+PS,8000
+CT,30,T
+OL,26,@oD@FC@hQ]pD@Fc@hQ]qD@FCAhQ]rD@FcAhQ]sD@
+OL,26,AFCBhQ]tD@FcBhQ]uD@FCChQ]vD@FcChQ]wD@FCD
+OL,26,BhQ]xD@FcDhQ]yD@FCEhQ]zD@FcEhQ]{D@FCFhQ]
+OL,26,C|D@FcFhQ]}D@FCGhQ]~D@FcGhQ]_xU]@@@@kW
+OL,26,DA`@AkWB@ABkWC`ACkWD@BDkWE`BEkWF@CFkWG`C
+OL,26,EGkWH@DHkWI`DIkWJ@EJkWK`EKkWL@FLkWM`FMkW
+OL,26,FN@GNkWO`GOkWP@HPkWQ`HQkWR@IRkWS`ISkWT@J
+OL,26,GTkWU`JUkWV@KVkWW`KWkWX@LXkWY`LYkWZ@MZkW
+OL,26,H[`M[kW\@N\kW]`N]kW^@O^kW_`O_kW
+OL,1,  Using an Object to build a    F(1/3)  
+OL,2,  repetitive tartan pattern.            
+OL,3,  CLUTS 0 and 1.                        
+OL,4,      0       1       2       3         
+OL,5,      01234567012345670123456701234567  
+OL,7,  00  This page requires a Level 2.5  \ 
+OL,8,   1  decoder with support for        \ 
+OL,9,   2  Active Objects within the       \ 
+OL,10,   3  Local Enhancement Data.         \ 
+OL,11,   4                                  \ 
+OL,12,   5                                  \ 
+OL,13,   6                                  \ 
+OL,14,   7                                  \ 
+OL,15,  10                                  \ 
+OL,16,   1                                  \ 
+OL,17,   2                                  \ 
+OL,18,   3                                  \ 
+OL,19,   4                                  \ 
+OL,20,   5                                  \ 
+OL,21,   6                                  \ 
+OL,22,   7                                  \ 
+PN,12802
+SC,0002
+PS,8000
+CT,30,T
+OL,26,@oD@FCHhQ]pD@FcHhQ]qD@FCIhQ]rD@FcIhQ]sD@
+OL,26,AFCJhQ]tD@FcJhQ]uD@FCKhQ]vD@FcKhQ]wD@FCL
+OL,26,BhQ]xD@FcLhQ]yD@FCMhQ]zD@FcMhQ]{D@FCNhQ]
+OL,26,C|D@FcNhQ]}D@FCOhQ]~D@FcOhQ]_xU]@@@@kW
+OL,26,DA`@AkWB@ABkWC`ACkWD@BDkWE`BEkWF@CFkWG`C
+OL,26,EGkWH@DHkWI`DIkWJ@EJkWK`EKkWL@FLkWM`FMkW
+OL,26,FN@GNkWO`GOkWP@HPkWQ`HQkWR@IRkWS`ISkWT@J
+OL,26,GTkWU`JUkWV@KVkWW`KWkWX@LXkWY`LYkWZ@MZkW
+OL,26,H[`M[kW\@N\kW]`N]kW^@O^kW_`O_kW
+OL,1,  Using an Object to build a    F(2/3)  
+OL,2,  repetitive tartan pattern.            
+OL,3,  CLUTS 2 and 3, default palette.       
+OL,4,      0       1       2       3         
+OL,5,      01234567012345670123456701234567  
+OL,7,  20  This page requires a Level 2.5  \ 
+OL,8,   1  decoder with support for        \ 
+OL,9,   2  Active Objects within the       \ 
+OL,10,   3  Local Enhancement Data.         \ 
+OL,11,   4                                  \ 
+OL,12,   5                                  \ 
+OL,13,   6                                  \ 
+OL,14,   7                                  \ 
+OL,15,  30                                  \ 
+OL,16,   1                                  \ 
+OL,17,   2                                  \ 
+OL,18,   3                                  \ 
+OL,19,   4                                  \ 
+OL,20,   5                                  \ 
+OL,21,   6                                  \ 
+OL,22,   7                                  \ 
+PN,12803
+SC,0003
+PS,8000
+CT,30,T
+OL,28,@@@@`P@p@PApAPBpBPCpCPDqLSUu]Wfyn[w}O@@
+OL,26,@oD@FCHhQ]pD@FcHhQ]qD@FCIhQ]rD@FcIhQ]sD@
+OL,26,AFCJhQ]tD@FcJhQ]uD@FCKhQ]vD@FcKhQ]wD@FCL
+OL,26,BhQ]xD@FcLhQ]yD@FCMhQ]zD@FcMhQ]{D@FCNhQ]
+OL,26,C|D@FcNhQ]}D@FCOhQ]~D@FcOhQ]_xU]@@@@kW
+OL,26,DA`@AkWB@ABkWC`ACkWD@BDkWE`BEkWF@CFkWG`C
+OL,26,EGkWH@DHkWI`DIkWJ@EJkWK`EKkWL@FLkWM`FMkW
+OL,26,FN@GNkWO`GOkWP@HPkWQ`HQkWR@IRkWS`ISkWT@J
+OL,26,GTkWU`JUkWV@KVkWW`KWkWX@LXkWY`LYkWZ@MZkW
+OL,26,H[`M[kW\@N\kW]`N]kW^@O^kW_`O_kW
+OL,1,  Using an Object to build a    F(3/3)  
+OL,2,  repetitive tartan pattern.            
+OL,3,  CLUTS 2 and 3, custom palette.        
+OL,4,      0       1       2       3         
+OL,5,      01234567012345670123456701234567  
+OL,7,  20  This page requires a Level 2.5  \ 
+OL,8,   1  decoder with support for        \ 
+OL,9,   2  Active Objects within the       \ 
+OL,10,   3  Local Enhancement Data.         \ 
+OL,11,   4                                  \ 
+OL,12,   5                                  \ 
+OL,13,   6                                  \ 
+OL,14,   7                                  \ 
+OL,15,  30                                  \ 
+OL,16,   1                                  \ 
+OL,17,   2                                  \ 
+OL,18,   3                                  \ 
+OL,19,   4                                  \ 
+OL,20,   5                                  \ 
+OL,21,   6                                  \ 
+OL,22,   7                                  \ 

examples/Objects-FastDogCat.tti

@@ -0,0 +1,79 @@
+DE,Object test based on clause 13.9 of ETSI EN 300 706
+PN,12001
+SC,0001
+PS,8000
+CT,30,T
+OL,26,@tD@T`NwdGhqIxD@T`NzdGhRS{D@T`N}dGhs\~D@
+OL,26,AT`N\`N_CxuI@IfAi`BImCilE`NEiaFigGikMIc
+OL,26,BNigOIlQ`AQiiRi`SIjxVS@IfAi`BImCilE`NEia
+OL,26,CFigGikMIcNigOIlQ`AQiiRi`SIjxw\@IfAi`BIm
+OL,26,DCilE`NEiaFigGikMIcNigOIlQ`AQiiRi`SIjB
+OL,1, This test is described in clause F(1/3)
+OL,2, 13.9 of ETSI EN 300 706. Adding objects
+OL,3, over the top line of each test should  
+OL,4, match the expected result on the line  
+OL,5, below.                                 
+OL,6, The objects on this subpage do not set 
+OL,7, the Active Position.                   
+OL,9,  Level 1 DTHE FAST DOG ANDACATBRAN IN  
+OL,10,          b                r   g        
+OL,12,   Object      LAZY COW     FOXCSAT     
+OL,13,                    p           y       
+OL,15,    ActiveDTHE FAST DOG ANDACATBRAN IN  
+OL,16, should beDTHE LAZY COW ANDAFOXCSAT IN  
+OL,18,  AdaptiveDTHE FAST DOG ANDACATBRAN IN  
+OL,19, should beDTHE LAZY COW AND FOXCSATBIN  
+OL,21,   PassiveDTHE FAST DOG ANDACATBRAN IN  
+OL,22, should beDTHEGLAZY COWDAND FOXCSATBIN  
+PN,12002
+SC,0002
+PS,8000
+CT,30,T
+OL,26,@tD@T`NvdGhqIxD@T`NydGhrS{D@T`N|dGhs]~D@
+OL,26,AT`N\`N_CxuIiD@@IfAi`BImCilE`NEiaFigGik
+OL,26,BMIcNigOIlQ`AQiiRi`SIjxvSiD@@IfAi`BImCil
+OL,26,CE`NEiaFigGikMIcNigOIlQ`AQiiRi`SIjxw]iD@
+OL,26,D@IfAi`BImCilE`NEiaFigGikMIcNigOIlQ`AQii
+OL,26,ERi`SIjBBBBBBBBBBB
+OL,1, This test is described in clause F(2/3)
+OL,2, 13.9 of ETSI EN 300 706.               
+OL,4, The objects on this subpage set the    
+OL,5, Active Position to row 1 column 0. They
+OL,6, are invoked two rows above the "should 
+OL,7, be" rows.                              
+OL,9,  Level 1 DTHE FAST DOG ANDACATBRAN IN  
+OL,10,          b                r   g        
+OL,12,   Object      LAZY COW     FOXCSAT     
+OL,13,                    p           y       
+OL,15,    ActiveDTHE FAST DOG ANDACATBRAN IN  
+OL,16, should beDTHE LAZY COW ANDAFOXCSAT IN  
+OL,18,  AdaptiveDTHE FAST DOG ANDACATBRAN IN  
+OL,19, should beDTHE LAZY COW AND FOXCSATBIN  
+OL,21,   PassiveDTHE FAST DOG ANDACATBRAN IN  
+OL,22, should beDTHEGLAZY COWDAND FOXCSATBIN  
+PN,12003
+SC,0003
+PS,8000
+CT,30,T
+OL,26,@tD@T`NvdGiP@hQKxD@T`NydGiP@hrT{D@T`N|dG
+OL,26,AiP@hS^~D@T`N\`N_CxUK@IfAi`BImCilE`NEia
+OL,26,BFigGikMIcNigOIlQ`AQiiRi`SIjxvT@IfAi`BIm
+OL,26,CCilE`NEiaFigGikMIcNigOIlQ`AQiiRi`SIjxW^
+OL,26,D@IfAi`BImCilE`NEiaFigGikMIcNigOIlQ`AQii
+OL,26,ERi`SIjBBBBBBBBBBB
+OL,1, This test is described in clause F(3/3)
+OL,2, 13.9 of ETSI EN 300 706.               
+OL,4, The objects on this subpage are invoked
+OL,5, two rows above the "should be" rows but
+OL,6, are preceded by an Origin Modifier with
+OL,7, a Row Offset of 1.                     
+OL,9,  Level 1 DTHE FAST DOG ANDACATBRAN IN  
+OL,10,          b                r   g        
+OL,12,   Object      LAZY COW     FOXCSAT     
+OL,13,                    p           y       
+OL,15,    ActiveDTHE FAST DOG ANDACATBRAN IN  
+OL,16, should beDTHE LAZY COW ANDAFOXCSAT IN  
+OL,18,  AdaptiveDTHE FAST DOG ANDACATBRAN IN  
+OL,19, should beDTHE LAZY COW AND FOXCSATBIN  
+OL,21,   PassiveDTHE FAST DOG ANDACATBRAN IN  
+OL,22, should beDTHEGLAZY COWDAND FOXCSATBIN  

examples/Rio.tti

@@ -0,0 +1,34 @@
+DE,Duran Duran Rio album cover
+CT,30,T
+PN,15100
+SC,0000
+PS,8000
+OL,28,@@@|g@@@FtiioE@}BFw~Ls_w}ww]_}_wM@p
+OL,26,@jD@D@KoD@S`GV`KpD@Q`GqD@L`GV`KWcOXCH[`G
+OL,26,ArD@M`GP`KVcOZCHsD@M`GP`KPcOZCH]`J]A}tD@
+OL,26,BM`GP`K]cJuD@]cJxD@Sc@UCHVc@yD@Sc@XCH[cJ
+OL,26,CzD@O`GR`NS`KTc@WCHZcN{D@M`GR`NT`KYcN|D@
+OL,26,DS`NT`KTcN}D@TcN~D@UcND@VcNCCCC
+OL,1,A]                                     \
+OL,2,A]GND U R A N   D U R A N L            \
+OL,3,A]                                     \
+OL,4,Q]        \               U*k]   V+\
+OL,5,Q]V    p  \                U"]S8# V"o\
+OL,6,Q]V p,#  W\  <,d       l,   U+]W8,,0V\
+OL,7,Q]V#     W\ *##)$ Z(dY(.$S`,#U]W),,!V"o\
+OL,8,Q]V  p,# W\Z     (d  #dYS8!  U]        \
+OL,9,Q]V,#    W\Zp  #,,0i Yxw|0Z,#U]        \
+OL,10,Q]V   p, W\Z #,Yx||tp~?~?~4  U]        \
+OL,11,Q]Vp,#   W\Z ,#Y{~}} `U]        \
+OL,12,Q]V    p W\Z )dYss//s| ~U]        \
+OL,13,Q]V p,#  W\     u$&~})(z5oU]        \
+OL,14,Q]V#     S\  p&Wo]U]          \
+OL,15,Q]V  p,# S\`&  W"?]Uz]          \
+OL,16,Q]V,#    S\!    Wk/o~//]U]       R`8#\
+OL,17,Q]V   p, W\       ot,,,x?yU]    R`,!  \
+OL,18,Q]Vp,#   W\Z   `&Y`o}|~g~a]U*]Rp&!    \
+OL,19,Q]V      W\Z 8&!Y "u+//y7z]U]        \
+OL,20,Q]       W\        "*a]U]    S`8#\
+OL,21,Q]       W\   pp||5o5~]U]  S`,!  \
+OL,22,Q]       W\ `~2o?h]U`~]Sp&!    \
+OL,23,Q]       W\htu]Uh]S8&       \

examples/SidePanels-NightMail.tti

@@ -0,0 +1,34 @@
+DE,Demo of 48 column display with side panels
+PN,12100
+SC,0000
+PS,8000
+CT,8,T
+OL,28,@@@|wxCu_@|wKpZA`UB_wLs_w}ww]_}_wM@@
+OL,26,@iAB@CBAl@jAB@CBlD@hPThRHAB@CBhPThQ^_C
+OL,26,AxVH@IrAirBIyCIViD@@IyAIVjD@@iwAiwBIyCIV
+OL,26,BkD@@iwAiwBIyCIWmD@@IwBIzCitDivEirFIWpD@
+OL,26,C@IyAIVtD@@iyAIVuD@@ipAiqBItCirDiyEIWxU^
+OL,26,D@`B@LB@IXAiXBIYCiYDIZEiZFI[Gi[HIPBB
+OL,1, "Night Mail" by W.H.Auden              
+OL,2,ELevel 2.5 & side panels & adaptive objs
+OL,3,                                      X|
+OL,4, This is the night mail crossing the bor
+OL,5, Bringing the cheque and the postal orde
+OL,6, Letters for the rich, letters for the p
+OL,7, The shop at the corner, the girl next d
+OL,8, Pulling up Beattock, a steady climb: X|
+OL,9, The gradient's against her, but she's o
+OL,10,                                      X|
+OL,11, Past cotton-grass and moorland boulder 
+OL,12, Shovelling white steam over her shoulde
+OL,13, Snorting noisily as she passes       X|
+OL,14, Silent miles of wind-bent grasses.   X|
+OL,15,                                      X|
+OL,16, Birds turn their heads as she approache
+OL,17, Stare from bushes at her blank-faced co
+OL,18, Sheep-dogs cannot turn her course;   X|
+OL,19, They slumber on with paws across.    X|
+OL,20, In the farm she passes no-one wakes, X|
+OL,21, But a jug in a bedroom gently shakes.X|
+OL,22,                                      X|
+OL,23,X123456789012345678901234567890123456789

examples/ZZTop.tti

@@ -0,0 +1,17 @@
+DE,ZZ Top logo
+CT,30,T
+PN,15000
+SC,0000
+PS,8000
+OL,28,@@@@`@@PMA|goApZA`UB_wLs_w}ww]_}_wM@p
+OL,26,@qD@CKXDkTPkyQKsrD@BkYCKSSKxTktsD@IkYJKS
+OL,26,AMKXNkTRkySKstD@GKXHkTLkYMKSPKxQktuD@FkY
+OL,26,BGKSJKXKkTOkyPKsvD@DKXEkTIkYJKSMKxNktcky
+OL,26,CdKswD@GKXHkTaKxbkt
+OL,9,Q   x?!                      
+OL,10,S `~'pppp0pppp0pppp0    
+OL,11,Q        `~]S x^\?!"{?#c~'cg~'c'     
+OL,12,Q       x]S `~^\' `~' x}|?y///!      
+OL,13,Q     `~]S x^\?!  #! "####"#!          
+OL,14,Q    x]S `~'                Q^\?!   
+OL,15,S       x'     

main.cpp

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QApplication>
+#include <QCommandLineParser>
+
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+	Q_INIT_RESOURCE(qteletextmaker);
+	QApplication app(argc, argv);
+	QCoreApplication::setApplicationName("QTeletextMaker");
+	QCoreApplication::setOrganizationName("gkmac.co.uk");
+	QCoreApplication::setOrganizationDomain("gkmac.co.uk");
+	QCoreApplication::setApplicationVersion("0.1-alpha");
+	QCommandLineParser parser;
+	parser.setApplicationDescription(QCoreApplication::applicationName());
+	parser.addHelpOption();
+	parser.addVersionOption();
+	parser.addPositionalArgument("file", "The file(s) to open.");
+	parser.process(app);
+
+	MainWindow *mainWin = Q_NULLPTR;
+	foreach (const QString &file, parser.positionalArguments()) {
+		MainWindow *newWin = new MainWindow(file);
+		newWin->tile(mainWin);
+		newWin->show();
+		mainWin = newWin;
+	}
+
+	if (!mainWin)
+		mainWin = new MainWindow;
+	mainWin->show();
+
+	return app.exec();
+}

mainwidget.cpp

@@ -0,0 +1,363 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QBitmap>
+#include <QFrame>
+#include <QKeyEvent>
+#include <QMenu>
+#include <QPainter>
+#include <QUndoCommand>
+#include <QWidget>
+#include <vector>
+#include <iostream>
+
+#include "mainwidget.h"
+
+#include "document.h"
+#include "page.h"
+#include "render.h"
+#include "x26triplets.h"
+
+TeletextWidget::TeletextWidget(QFrame *parent) : QFrame(parent)
+{
+	this->resize(QSize(480, 250));
+	this->setAttribute(Qt::WA_NoSystemBackground);
+	m_teletextDocument = new TeletextDocument();
+	m_teletextPage = m_teletextDocument->currentSubPage();
+	m_pageRender.setTeletextPage(m_teletextPage);
+	m_insertMode = false;
+	m_grid = false;
+	setFocusPolicy(Qt::StrongFocus);
+	m_flashTiming = m_flashPhase = 0;
+	connect(&m_pageRender, &TeletextPageRender::flashChanged, this, &TeletextWidget::updateFlashTimer);
+	connect(&m_pageRender, &TeletextPageRender::sidePanelsChanged, this, &TeletextWidget::changeSize);
+	connect(m_teletextDocument, &TeletextDocument::subPageSelected, this, &TeletextWidget::subPageSelected);
+	connect(m_teletextDocument, &TeletextDocument::contentsChange, this, &TeletextWidget::refreshRow);
+	connect(m_teletextDocument, &TeletextDocument::refreshNeeded, this, &TeletextWidget::refreshPage);
+}
+
+TeletextWidget::~TeletextWidget()
+{
+	if (m_flashTimer.isActive())
+		m_flashTimer.stop();
+	delete m_teletextDocument;
+}
+
+void TeletextWidget::subPageSelected()
+{
+	m_teletextPage = m_teletextDocument->currentSubPage();
+	m_pageRender.setTeletextPage(m_teletextPage);
+	refreshPage();
+}
+
+void TeletextWidget::refreshRow(int rowChanged)
+{
+	m_pageRender.renderPage(rowChanged);
+	update();
+}
+
+void TeletextWidget::refreshPage()
+{
+	m_pageRender.decodePage();
+	m_pageRender.renderPage();
+	update();
+}
+
+void TeletextWidget::paintEvent(QPaintEvent *event)
+{
+	Q_UNUSED(event);
+	QPainter widgetPainter(this);
+
+	widgetPainter.drawPixmap(m_pageRender.leftSidePanelColumns()*12, 0, *m_pageRender.pagePixmap(m_flashPhase), 0, 0, 480, 250);
+	if (m_pageRender.leftSidePanelColumns())
+		widgetPainter.drawPixmap(0, 0, *m_pageRender.pagePixmap(m_flashPhase), 864-m_pageRender.leftSidePanelColumns()*12, 0, m_pageRender.leftSidePanelColumns()*12, 250);
+	if (m_pageRender.rightSidePanelColumns())
+		widgetPainter.drawPixmap(480+m_pageRender.leftSidePanelColumns()*12, 0, *m_pageRender.pagePixmap(m_flashPhase), 480, 0, m_pageRender.rightSidePanelColumns()*12, 250);
+	if (this->hasFocus())
+		widgetPainter.fillRect((m_teletextDocument->cursorColumn()+m_pageRender.leftSidePanelColumns())*12, m_teletextDocument->cursorRow()*10, 12, 10, QColor(128, 128, 128, 192));
+}
+
+void TeletextWidget::updateFlashTimer(int newFlashTimer)
+{
+	m_flashTiming = newFlashTimer;
+	m_flashPhase = 0;
+	if (newFlashTimer == 0) {
+		m_flashTimer.stop();
+		update();
+		return;
+	}
+	m_flashTimer.start((newFlashTimer == 1) ? 500 : 167, this);
+}
+
+void TeletextWidget::timerEvent(QTimerEvent *event)
+{
+	if (event->timerId() == m_flashTimer.timerId()) {
+		if (m_flashTiming == 1)
+			m_flashPhase += 3;
+		else
+			m_flashPhase++;
+		if (m_flashPhase == 6)
+			m_flashPhase = 0;
+		update();
+	} else
+		QWidget::timerEvent(event);
+}
+
+void TeletextWidget::toggleReveal(bool revealOn)
+{
+	m_pageRender.setReveal(revealOn);
+	update();
+}
+
+void TeletextWidget::toggleMix(bool mixOn)
+{
+	m_pageRender.setMix(mixOn);
+	update();
+}
+
+void TeletextWidget::toggleGrid(bool gridOn)
+{
+	m_grid = gridOn;
+	m_pageRender.setGrid(gridOn);
+	m_pageRender.renderPage();
+}
+
+void TeletextWidget::setControlBit(int bitNumber, bool active)
+{
+	m_teletextPage->setControlBit(bitNumber, active);
+	if (bitNumber == 1 || bitNumber == 2) {
+		m_pageRender.decodePage();
+		m_pageRender.renderPage();
+	}
+}
+
+void TeletextWidget::setDefaultCharSet(int newDefaultCharSet)
+{
+	m_teletextPage->setDefaultCharSet(newDefaultCharSet);
+}
+
+void TeletextWidget::setDefaultNOS(int newDefaultNOS)
+{
+	m_teletextPage->setDefaultNOS(newDefaultNOS);
+}
+
+void TeletextWidget::setDefaultScreenColour(int newColour)
+{
+	m_teletextPage->setDefaultScreenColour(newColour);
+	m_pageRender.decodePage();
+	m_pageRender.renderPage();
+}
+
+void TeletextWidget::setDefaultRowColour(int newColour)
+{
+	m_teletextPage->setDefaultRowColour(newColour);
+	m_pageRender.decodePage();
+	m_pageRender.renderPage();
+}
+
+void TeletextWidget::setColourTableRemap(int newMap)
+{
+	m_teletextPage->setColourTableRemap(newMap);
+	m_pageRender.decodePage();
+	m_pageRender.renderPage();
+}
+
+void TeletextWidget::setBlackBackgroundSubst(bool substOn)
+{
+	m_teletextPage->setBlackBackgroundSubst(substOn);
+	m_pageRender.decodePage();
+	m_pageRender.renderPage();
+}
+
+void TeletextWidget::setSidePanelWidths(int newLeftSidePanelColumns, int newRightSidePanelColumns)
+{
+	m_teletextPage->setLeftSidePanelDisplayed(newLeftSidePanelColumns != 0);
+	m_teletextPage->setRightSidePanelDisplayed(newRightSidePanelColumns != 0);
+	if (newLeftSidePanelColumns)
+		m_teletextPage->setSidePanelColumns((newLeftSidePanelColumns == 16) ? 0 : newLeftSidePanelColumns);
+	else
+		m_teletextPage->setSidePanelColumns((newRightSidePanelColumns == 0) ? 0 : 16-newRightSidePanelColumns);
+	m_pageRender.updateSidePanels();
+}
+
+void TeletextWidget::setSidePanelAtL35Only(bool newSidePanelAtL35Only)
+{
+	m_teletextPage->setSidePanelStatusL25(!newSidePanelAtL35Only);
+	m_pageRender.updateSidePanels();
+}
+
+void TeletextWidget::changeSize()
+{
+	setFixedSize(QSize(480+(pageRender()->leftSidePanelColumns()+pageRender()->rightSidePanelColumns())*12, 250));
+	emit sizeChanged();
+}
+
+void TeletextWidget::keyPressEvent(QKeyEvent *event)
+{
+	if (event->key() < 0x01000000) {
+		char keyPressed = *qPrintable(event->text());
+//		if (attributes[cursorRow][cursorColumn].mosaics && (keyPressed < 0x40 || keyPressed > 0x5f) && (((keyPressed >= '1' && keyPressed <= '9') && (event->modifiers() & Qt::KeypadModifier)) || (keyPressed >= 'a' && keyPressed <= 'z'))) {
+		if (m_pageRender.level1MosaicAttribute(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn()) && (keyPressed < 0x40 || keyPressed > 0x5f) && (((keyPressed >= '1' && keyPressed <= '9') && (event->modifiers() & Qt::KeypadModifier)) || (keyPressed >= 'a' && keyPressed <= 'z'))) {
+			if (!(m_teletextPage->character(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn()) & 0x20))
+				setCharacter(0x20);
+			switch (event->key()) {
+				case Qt::Key_Q:
+				case Qt::Key_7:
+					toggleCharacterBit(0x01); // Top left
+					break;
+				case Qt::Key_W:
+				case Qt::Key_8:
+					toggleCharacterBit(0x02); // Top right
+					break;
+				case Qt::Key_A:
+				case Qt::Key_4:
+					toggleCharacterBit(0x04); // Middle left
+					break;
+				case Qt::Key_S:
+				case Qt::Key_5:
+					toggleCharacterBit(0x08); // Middle right
+					break;
+				case Qt::Key_Z:
+				case Qt::Key_2:
+					toggleCharacterBit(0x40); // Bottom left
+					break;
+				case Qt::Key_X:
+				case Qt::Key_1:
+					toggleCharacterBit(0x10); // Bottom right
+					break;
+				case Qt::Key_R:
+				case Qt::Key_9:
+					toggleCharacterBit(0x5f); // Invert
+					break;
+				case Qt::Key_F:
+				case Qt::Key_6:
+					toggleCharacterBit(0x7f); // Set all
+					break;
+				case Qt::Key_C:
+				case Qt::Key_3:
+					toggleCharacterBit(0x20); // Clear all
+					break;
+			}
+			return;
+		}
+		if (keyPressed == 0x20)
+			setCharacter((event->modifiers() & Qt::ShiftModifier) ? 0x7f : 0x20);
+		else
+			setCharacter(keyPressed);
+		return;
+	}
+	switch (event->key()) {
+		case Qt::Key_Backspace:
+			backspaceEvent();
+			break;
+		case Qt::Key_Up:
+			m_teletextDocument->cursorUp();
+			update();
+			break;
+		case Qt::Key_Down:
+			m_teletextDocument->cursorDown();
+			update();
+			break;
+		case Qt::Key_Left:
+			m_teletextDocument->cursorLeft();
+			update();
+			break;
+		case Qt::Key_Right:
+			m_teletextDocument->cursorRight();
+			update();
+			break;
+		case Qt::Key_Return:
+		case Qt::Key_Enter:
+			m_teletextDocument->cursorDown();
+			// fall through
+		case Qt::Key_Home:
+			m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 0);
+			update();
+			break;
+		case Qt::Key_End:
+			m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 39);
+			update();
+			break;
+
+		case Qt::Key_PageUp:
+			m_teletextDocument->selectSubPageNext();
+			break;
+		case Qt::Key_PageDown:
+			m_teletextDocument->selectSubPagePrevious();
+			break;
+		case Qt::Key_F5:
+			m_pageRender.decodePage();
+			m_pageRender.renderPage();
+			update();
+			break;
+		default:
+			QFrame::keyPressEvent(event);
+	}
+}
+
+void TeletextWidget::setCharacter(unsigned char newCharacter)
+{
+	QUndoCommand *overwriteCharacterCommand = new OverwriteCharacterCommand(m_teletextDocument, newCharacter);
+	m_teletextDocument->undoStack()->push(overwriteCharacterCommand);
+}
+
+void TeletextWidget::toggleCharacterBit(unsigned char bitToToggle)
+{
+	QUndoCommand *toggleMosaicBitCommand = new ToggleMosaicBitCommand(m_teletextDocument, bitToToggle);
+	m_teletextDocument->undoStack()->push(toggleMosaicBitCommand);
+}
+
+void TeletextWidget::backspaceEvent()
+{
+	QUndoCommand *backspaceCommand = new BackspaceCommand(m_teletextDocument);
+	m_teletextDocument->undoStack()->push(backspaceCommand);
+}
+
+void TeletextWidget::cursorToMouse(QPoint mousePosition)
+{
+	int newCursorRow = mousePosition.y() / 10;
+	int newCursorColumn = mousePosition.x() / 12 - m_pageRender.leftSidePanelColumns();
+	if (newCursorRow < 1)
+		newCursorRow = 1;
+	if (newCursorRow > 24)
+		newCursorRow = 24;
+	if (newCursorColumn < 0)
+		newCursorColumn = 0;
+	if (newCursorColumn > 39)
+		newCursorColumn = 39;
+	m_teletextDocument->moveCursor(newCursorRow, newCursorColumn);
+}
+
+void TeletextWidget::mousePressEvent(QMouseEvent *event)
+{
+	if (event->button() == Qt::LeftButton) {
+		cursorToMouse(event->pos());
+		update();
+	}
+}
+
+void TeletextWidget::focusInEvent(QFocusEvent *event)
+{
+	QFrame::focusInEvent(event);
+}
+
+void TeletextWidget::focusOutEvent(QFocusEvent *event)
+{
+	QFrame::focusOutEvent(event);
+}

mainwidget.h

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef MAINWIDGET_H
+#define MAINWIDGET_H
+
+#include <QBasicTimer>
+#include <QFrame>
+#include <QTextStream>
+#include <vector>
+
+#include "document.h"
+#include "page.h"
+#include "render.h"
+
+class QPaintEvent;
+
+class TeletextWidget : public QFrame
+{
+	Q_OBJECT
+
+public:
+	TeletextWidget(QFrame *parent = 0);
+	~TeletextWidget();
+	void setCharacter(unsigned char);
+	void toggleCharacterBit(unsigned char);
+	void backspaceEvent();
+
+	QSize sizeHint() { return QSize(480+(pageRender()->leftSidePanelColumns()+pageRender()->rightSidePanelColumns())*12, 250); }
+
+	TeletextDocument* document() const { return m_teletextDocument; }
+	TeletextPageRender *pageRender() { return &m_pageRender; }
+
+signals:
+	void sizeChanged();
+
+public slots:
+	void subPageSelected();
+	void refreshPage();
+	void toggleReveal(bool);
+	void toggleMix(bool);
+	void toggleGrid(bool);
+	void updateFlashTimer(int);
+	void refreshRow(int);
+
+	void setControlBit(int, bool);
+	void setDefaultCharSet(int);
+	void setDefaultNOS(int);
+	void setDefaultScreenColour(int);
+	void setDefaultRowColour(int);
+	void setColourTableRemap(int);
+	void setBlackBackgroundSubst(bool);
+	void setSidePanelWidths(int, int);
+	void setSidePanelAtL35Only(bool);
+	void changeSize();
+
+protected:
+	void paintEvent(QPaintEvent *event) override;
+	void keyPressEvent(QKeyEvent *event) override;
+	void mousePressEvent(QMouseEvent *event) override;
+	void focusInEvent(QFocusEvent *event) override;
+	void focusOutEvent(QFocusEvent *event) override;
+
+	TeletextPageRender m_pageRender;
+
+private:
+	TeletextDocument* m_teletextDocument;
+	TeletextPage* m_teletextPage;
+	bool m_insertMode, m_grid;
+	QBasicTimer m_flashTimer;
+	int m_flashTiming, m_flashPhase;
+
+	void timerEvent(QTimerEvent *event) override;
+
+	void calculateDimensions();
+
+	void cursorToMouse(QPoint mousePosition);
+};
+
+#endif

mainwindow.cpp

@@ -0,0 +1,834 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QApplication>
+#include <QDesktopServices>
+#include <QFileDialog>
+#include <QList>
+#include <QMenuBar>
+#include <QMessageBox>
+#include <QRadioButton>
+#include <QScreen>
+#include <QSettings>
+#include <QStatusBar>
+#include <QToolBar>
+#include <iostream>
+
+#include "mainwindow.h"
+
+#include "mainwidget.h"
+#include "pageoptionsdockwidget.h"
+#include "palettedockwidget.h"
+#include "x26dockwidget.h"
+#include "x28dockwidget.h"
+
+MainWindow::MainWindow()
+{
+	init();
+	setCurrentFile(QString());
+	m_textWidget->refreshPage();
+}
+
+MainWindow::MainWindow(const QString &fileName)
+{
+	init();
+	loadFile(fileName);
+	m_textWidget->refreshPage();
+}
+
+void MainWindow::closeEvent(QCloseEvent *event)
+{
+	if (maybeSave()) {
+		writeSettings();
+		event->accept();
+	} else
+		event->ignore();
+}
+
+void MainWindow::newFile()
+{
+	MainWindow *other = new MainWindow;
+	other->tile(this);
+	other->show();
+}
+
+void MainWindow::open()
+{
+	const QString fileName = QFileDialog::getOpenFileName(this);
+	if (!fileName.isEmpty())
+		openFile(fileName);
+}
+
+void MainWindow::openFile(const QString &fileName)
+{
+	MainWindow *existing = findMainWindow(fileName);
+	if (existing) {
+		existing->show();
+		existing->raise();
+		existing->activateWindow();
+		return;
+	}
+
+	if (m_isUntitled && m_textWidget->document()->isEmpty() && !isWindowModified()) {
+		loadFile(fileName);
+		m_textWidget->refreshPage();
+		return;
+	}
+
+	MainWindow *other = new MainWindow(fileName);
+	if (other->m_isUntitled) {
+		delete other;
+		return;
+	}
+	other->tile(this);
+	other->show();
+}
+
+bool MainWindow::save()
+{
+	return m_isUntitled ? saveAs() : saveFile(m_curFile);
+}
+
+bool MainWindow::saveAs()
+{
+	QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"), m_curFile);
+	if (fileName.isEmpty())
+		return false;
+
+	return saveFile(fileName);
+}
+
+void MainWindow::exportURL()
+{
+	QDesktopServices::openUrl(QUrl(m_textWidget->document()->currentSubPage()->exportURLHash("http://www.zxnet.co.uk/teletext/editor/")));
+}
+
+void MainWindow::about()
+{
+	QMessageBox::about(this, tr("About QTeletextMaker"), tr("<b>QTeletextMaker</b><br><i>Pre-alpha version</i>.<br><br>Copyright (C) 2020 Gavin MacGregor<br><br>Released under the GNU General Public License version 3"));
+}
+
+void MainWindow::init()
+{
+	setAttribute(Qt::WA_DeleteOnClose);
+
+	m_isUntitled = true;
+
+	m_textWidget = new TeletextWidget;
+
+	m_paletteDock = new PaletteDockWidget(m_textWidget);
+	addDockWidget(Qt::RightDockWidgetArea, m_paletteDock);
+	m_x26Dock = new X26DockWidget(m_textWidget);
+	addDockWidget(Qt::RightDockWidgetArea, m_x26Dock);
+	m_x28Dock = new X28DockWidget(m_textWidget);
+	addDockWidget(Qt::RightDockWidgetArea, m_x28Dock);
+	m_pageOptionsDock = new PageOptionsDockWidget(m_textWidget);
+	addDockWidget(Qt::RightDockWidgetArea, m_pageOptionsDock);
+
+	createActions();
+	createStatusBar();
+
+	readSettings();
+
+	m_textScene = new QGraphicsScene(this);
+	m_textScene->setSceneRect(0, 0, 600, 288);
+	m_fullScreenTopRectItem = new QGraphicsRectItem(0, 0, 600, 19);
+	m_fullScreenTopRectItem->setPen(Qt::NoPen);
+	m_fullScreenTopRectItem->setBrush(QBrush(QColor(0, 0, 0)));
+	m_textScene->addItem(m_fullScreenTopRectItem);
+	m_fullScreenBottomRectItem = new QGraphicsRectItem(0, 269, 600, 19);
+	m_fullScreenBottomRectItem->setPen(Qt::NoPen);
+	m_fullScreenBottomRectItem->setBrush(QBrush(QColor(0, 0, 0)));
+	m_textScene->addItem(m_fullScreenBottomRectItem);
+
+	for (int r=0; r<25; r++) {
+		m_fullRowLeftRectItem[r] = new QGraphicsRectItem(0, 19+r*10, 60, 10);
+		m_fullRowLeftRectItem[r]->setPen(Qt::NoPen);
+		m_fullRowLeftRectItem[r]->setBrush(QBrush(QColor(0, 0, 0)));
+		m_textScene->addItem(m_fullRowLeftRectItem[r]);
+		m_fullRowRightRectItem[r] = new QGraphicsRectItem(540, 19+r*10, 60, 10);
+		m_fullRowRightRectItem[r]->setPen(Qt::NoPen);
+		m_fullRowRightRectItem[r]->setBrush(QBrush(QColor(0, 0, 0)));
+		m_textScene->addItem(m_fullRowRightRectItem[r]);
+	}
+
+	m_textProxyWidget = m_textScene->addWidget(m_textWidget);
+	m_textProxyWidget->setPos(60, 19);
+	m_textProxyWidget->setAutoFillBackground(false);
+
+	m_textView = new QGraphicsView(this);
+	m_textView->setScene(m_textScene);
+	m_textView->setRenderHints(QPainter::SmoothPixmapTransform);
+	m_textView->setBackgroundBrush(QBrush(QColor(32, 48, 96)));
+	setSceneDimensions();
+	setCentralWidget(m_textView);
+
+	connect(m_textWidget->document(), &TeletextDocument::cursorMoved, this, &MainWindow::updateCursorPosition);
+	connect(m_textWidget->document()->undoStack(), &QUndoStack::cleanChanged, this, [=]() { setWindowModified(!m_textWidget->document()->undoStack()->isClean()); } );
+	connect(m_textWidget->document(), &TeletextDocument::aboutToChangeSubPage, m_x26Dock, &X26DockWidget::unloadX26List);
+	connect(m_textWidget->document(), &TeletextDocument::subPageSelected, this, &MainWindow::updatePageWidgets);
+	connect(m_textWidget, &TeletextWidget::sizeChanged, this, &MainWindow::setSceneDimensions);
+	connect(m_textWidget->pageRender(), &TeletextPageRender::fullScreenColourChanged, this, &MainWindow::updateFullScreenRectItems);
+	connect(m_textWidget->pageRender(), &TeletextPageRender::fullRowColourChanged, this, &MainWindow::updateFullRowRectItems);
+
+	setUnifiedTitleAndToolBarOnMac(true);
+
+	updatePageWidgets();
+}
+
+void MainWindow::updateFullScreenRectItems(QColor newColor)
+{
+	m_fullScreenTopRectItem->setBrush(QBrush(newColor));
+	m_fullScreenBottomRectItem->setBrush(QBrush(newColor));
+}
+
+void MainWindow::updateFullRowRectItems(int row, QColor newColor)
+{
+	m_fullRowLeftRectItem[row]->setBrush(QBrush(newColor));
+	m_fullRowRightRectItem[row]->setBrush(QBrush(newColor));
+}
+
+void MainWindow::tile(const QMainWindow *previous)
+{
+	//TODO sort out default tiling or positioning
+	if (!previous)
+		return;
+	int topFrameWidth = previous->geometry().top() - previous->pos().y();
+	if (!topFrameWidth)
+		topFrameWidth = 40;
+	const QPoint pos = previous->pos() + 2 * QPoint(topFrameWidth, topFrameWidth);
+	if (QGuiApplication::primaryScreen()->availableGeometry().contains(rect().bottomRight() + pos))
+		move(pos);
+}
+
+void MainWindow::createActions()
+{
+	QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
+	QToolBar *fileToolBar = addToolBar(tr("File"));
+	fileToolBar->setObjectName("fileToolBar");
+
+	const QIcon newIcon = QIcon::fromTheme("document-new", QIcon(":/images/new.png"));
+	QAction *newAct = new QAction(newIcon, tr("&New"), this);
+	newAct->setShortcuts(QKeySequence::New);
+	newAct->setStatusTip(tr("Create a new file"));
+	connect(newAct, &QAction::triggered, this, &MainWindow::newFile);
+	fileMenu->addAction(newAct);
+	fileToolBar->addAction(newAct);
+
+	const QIcon openIcon = QIcon::fromTheme("document-open", QIcon(":/images/open.png"));
+	QAction *openAct = new QAction(openIcon, tr("&Open..."), this);
+	openAct->setShortcuts(QKeySequence::Open);
+	openAct->setStatusTip(tr("Open an existing file"));
+	connect(openAct, &QAction::triggered, this, &MainWindow::open);
+	fileMenu->addAction(openAct);
+	fileToolBar->addAction(openAct);
+
+	const QIcon saveIcon = QIcon::fromTheme("document-save", QIcon(":/images/save.png"));
+	QAction *saveAct = new QAction(saveIcon, tr("&Save"), this);
+	saveAct->setShortcuts(QKeySequence::Save);
+	saveAct->setStatusTip(tr("Save the document to disk"));
+	connect(saveAct, &QAction::triggered, this, &MainWindow::save);
+	fileMenu->addAction(saveAct);
+	fileToolBar->addAction(saveAct);
+
+	const QIcon saveAsIcon = QIcon::fromTheme("document-save-as");
+	QAction *saveAsAct = fileMenu->addAction(saveAsIcon, tr("Save &As..."), this, &MainWindow::saveAs);
+	saveAsAct->setShortcuts(QKeySequence::SaveAs);
+	saveAsAct->setStatusTip(tr("Save the document under a new name"));
+
+	fileMenu->addSeparator();
+
+	QMenu *recentMenu = fileMenu->addMenu(tr("Recent"));
+	connect(recentMenu, &QMenu::aboutToShow, this, &MainWindow::updateRecentFileActions);
+	m_recentFileSubMenuAct = recentMenu->menuAction();
+
+	for (int i = 0; i < m_MaxRecentFiles; ++i) {
+		m_recentFileActs[i] = recentMenu->addAction(QString(), this, &MainWindow::openRecentFile);
+		m_recentFileActs[i]->setVisible(false);
+	}
+
+	m_recentFileSeparator = fileMenu->addSeparator();
+
+	setRecentFilesVisible(MainWindow::hasRecentFiles());
+
+	QAction *exportAct = fileMenu->addAction(tr("Export to zxnet.co.uk"));
+	exportAct->setStatusTip("Export URL to zxnet.co.uk online editor");
+	connect(exportAct, &QAction::triggered, this, &MainWindow::exportURL);
+
+	QAction *closeAct = fileMenu->addAction(tr("&Close"), this, &QWidget::close);
+	closeAct->setShortcut(tr("Ctrl+W"));
+	closeAct->setStatusTip(tr("Close this window"));
+
+	const QIcon exitIcon = QIcon::fromTheme("application-exit");
+	QAction *exitAct = fileMenu->addAction(exitIcon, tr("E&xit"), qApp, &QApplication::closeAllWindows);
+	exitAct->setShortcuts(QKeySequence::Quit);
+	exitAct->setStatusTip(tr("Exit the application"));
+
+	QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
+	QToolBar *editToolBar = addToolBar(tr("Edit"));
+	editToolBar->setObjectName("editToolBar");
+
+	QAction *undoAction = m_textWidget->document()->undoStack()->createUndoAction(this, tr("&Undo"));
+	editMenu->addAction(undoAction);
+	undoAction->setShortcuts(QKeySequence::Undo);
+	QAction *redoAction = m_textWidget->document()->undoStack()->createRedoAction(this, tr("&Redo"));
+	editMenu->addAction(redoAction);
+	redoAction->setShortcuts(QKeySequence::Redo);
+
+	editMenu->addSeparator();
+#ifndef QT_NO_CLIPBOARD
+/*	const QIcon cutIcon = QIcon::fromTheme("edit-cut", QIcon(":/images/cut.png"));
+	QAction *cutAct = new QAction(cutIcon, tr("Cu&t"), this);
+	cutAct->setShortcuts(QKeySequence::Cut);
+	cutAct->setStatusTip(tr("Cut the current selection's contents to the "
+                            "clipboard"));
+	connect(cutAct, &QAction::triggered, textWidget, &QTextEdit::cut);
+	editMenu->addAction(cutAct);
+	editToolBar->addAction(cutAct);
+
+	const QIcon copyIcon = QIcon::fromTheme("edit-copy", QIcon(":/images/copy.png"));
+	QAction *copyAct = new QAction(copyIcon, tr("&Copy"), this);
+	copyAct->setShortcuts(QKeySequence::Copy);
+	copyAct->setStatusTip(tr("Copy the current selection's contents to the "
+                             "clipboard"));
+	connect(copyAct, &QAction::triggered, textWidget, &QTextEdit::copy);
+	editMenu->addAction(copyAct);
+	editToolBar->addAction(copyAct);
+
+	const QIcon pasteIcon = QIcon::fromTheme("edit-paste", QIcon(":/images/paste.png"));
+	QAction *pasteAct = new QAction(pasteIcon, tr("&Paste"), this);
+	pasteAct->setShortcuts(QKeySequence::Paste);
+	pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
+                              "selection"));
+	connect(pasteAct, &QAction::triggered, textWidget, &QTextEdit::paste);
+	editMenu->addAction(pasteAct);
+	editToolBar->addAction(pasteAct);
+
+	editMenu->addSeparator();
+*/
+#endif // !QT_NO_CLIPBOARD
+
+	QAction *insertBeforeAct = editMenu->addAction(tr("&Insert subpage before"));
+	insertBeforeAct->setStatusTip(tr("Insert a blank subpage before this subpage"));
+	connect(insertBeforeAct, &QAction::triggered, [=]() { insertSubPage(false, false); });
+
+	QAction *insertAfterAct = editMenu->addAction(tr("Insert subpage after"));
+	insertAfterAct->setStatusTip(tr("Insert a blank subpage after this subpage"));
+	connect(insertAfterAct, &QAction::triggered, [=]() { insertSubPage(true, false); });
+
+	QAction *insertCopyAct = editMenu->addAction(tr("Insert subpage copy"));
+	insertCopyAct->setStatusTip(tr("Insert a subpage that's a copy of this subpage"));
+	connect(insertCopyAct, &QAction::triggered, [=]() { insertSubPage(false, true); });
+
+	QMenu *viewMenu = menuBar()->addMenu(tr("&View"));
+
+	QAction *revealAct = viewMenu->addAction(tr("&Reveal"));
+	revealAct->setCheckable(true);
+	revealAct->setStatusTip(tr("Toggle reveal"));
+	connect(revealAct, &QAction::toggled, m_textWidget, &TeletextWidget::toggleReveal);
+
+	QAction *mixAct = viewMenu->addAction(tr("&Mix"));
+	mixAct->setCheckable(true);
+	mixAct->setStatusTip(tr("Toggle mix"));
+	connect(mixAct, &QAction::toggled, m_textWidget, &TeletextWidget::toggleMix);
+
+	QAction *gridAct = viewMenu->addAction(tr("&Grid"));
+	gridAct->setCheckable(true);
+	gridAct->setStatusTip(tr("Toggle the text grid"));
+	connect(gridAct, &QAction::toggled, m_textWidget, &TeletextWidget::toggleGrid);
+
+	QAction *showCodesAct = viewMenu->addAction(tr("Show codes"));
+	showCodesAct->setCheckable(true);
+	showCodesAct->setStatusTip(tr("Toggle showing of control codes"));
+	connect(showCodesAct, &QAction::toggled, m_textWidget->pageRender(), &TeletextPageRender::setShowCodes);
+
+	viewMenu->addSeparator();
+
+	QMenu *borderSubMenu = viewMenu->addMenu(tr("Border"));
+	m_borderActs[0] = borderSubMenu->addAction(tr("None"));
+	m_borderActs[0]->setStatusTip(tr("View with no border"));
+	m_borderActs[1] = borderSubMenu->addAction(tr("Minimal"));
+	m_borderActs[1]->setStatusTip(tr("View with minimal border"));
+	m_borderActs[2] = borderSubMenu->addAction(tr("Full"));
+	m_borderActs[2]->setStatusTip(tr("View with full overscan border"));
+
+	QMenu *aspectRatioSubMenu = viewMenu->addMenu(tr("Aspect ratio"));
+	m_aspectRatioActs[0] = aspectRatioSubMenu->addAction(tr("4:3"));
+	m_aspectRatioActs[0]->setStatusTip(tr("View in 4:3 aspect ratio"));
+	m_aspectRatioActs[1] = aspectRatioSubMenu->addAction(tr("16:9 pillarbox"));
+	m_aspectRatioActs[1]->setStatusTip(tr("View in 16:9 with space on either side"));
+	m_aspectRatioActs[2] = aspectRatioSubMenu->addAction(tr("16:9 stretch"));
+	m_aspectRatioActs[2]->setStatusTip(tr("View in 16:9 with horizontally stretched text"));
+	m_aspectRatioActs[3] = aspectRatioSubMenu->addAction(tr("Pixel 1:2"));
+	m_aspectRatioActs[3]->setStatusTip(tr("View with 1:2 pixel mapping"));
+
+	QActionGroup *borderGroup = new QActionGroup(this);
+	QActionGroup *aspectRatioGroup = new QActionGroup(this);
+	for (int i=0; i<=3; i++) {
+		m_aspectRatioActs[i]->setCheckable(true);
+		connect(m_aspectRatioActs[i], &QAction::triggered, [=]() { setAspectRatio(i); });
+		aspectRatioGroup->addAction(m_aspectRatioActs[i]);
+		if (i == 3)
+			break;
+		m_borderActs[i]->setCheckable(true);
+		connect(m_borderActs[i], &QAction::triggered, [=]() { setBorder(i); });
+		borderGroup->addAction(m_borderActs[i]);
+	}
+
+	QAction *zoomInAct = viewMenu->addAction(tr("Zoom In"));
+	zoomInAct->setShortcuts(QKeySequence::ZoomIn);
+	zoomInAct->setStatusTip(tr("Zoom in"));
+	connect(zoomInAct, &QAction::triggered, this, &MainWindow::zoomIn);
+
+	QAction *zoomOutAct = viewMenu->addAction(tr("Zoom Out"));
+	zoomOutAct->setShortcuts(QKeySequence::ZoomOut);
+	zoomOutAct->setStatusTip(tr("Zoom out"));
+	connect(zoomOutAct, &QAction::triggered, this, &MainWindow::zoomOut);
+
+	QAction *zoomResetAct = viewMenu->addAction(tr("Reset zoom"));
+	zoomResetAct->setStatusTip(tr("Reset zoom level"));
+	connect(zoomResetAct, &QAction::triggered, this, &MainWindow::zoomReset);
+
+	QMenu *insertMenu = menuBar()->addMenu(tr("&Insert"));
+
+	QMenu *alphaColourSubMenu = insertMenu->addMenu(tr("Alphanumeric colour"));
+	QMenu *mosaicColourSubMenu = insertMenu->addMenu(tr("Mosaic colour"));
+	for (int i=0; i<=7; i++) {
+		const char *colours[] = { "Black", "Red", "Green", "Yellow", "Blue", "Magenta", "Cyan", "White" };
+
+		QAction *alphaColour = alphaColourSubMenu->addAction(tr(colours[i]));
+		alphaColour->setStatusTip(QString("Insert alphanumeric %1 attribute").arg(QString(colours[i]).toLower()));
+		connect(alphaColour, &QAction::triggered, [=]() { m_textWidget->setCharacter(i); });
+
+		QAction *mosaicColour = mosaicColourSubMenu->addAction(tr(colours[i]));
+		mosaicColour->setStatusTip(QString("Insert mosaic %1 attribute").arg(QString(colours[i]).toLower()));
+		connect(mosaicColour, &QAction::triggered, [=]() { m_textWidget->setCharacter(i+0x10); });
+	}
+
+	QMenu *mosaicsStyleSubMenu = insertMenu->addMenu(tr("Mosaics style"));
+	QAction *mosaicsContiguousAct = mosaicsStyleSubMenu->addAction(tr("Contiguous mosaics"));
+	mosaicsContiguousAct->setStatusTip(tr("Insert contiguous mosaics attribute"));
+	connect(mosaicsContiguousAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x19); });
+	QAction *mosaicsSeparatedAct = mosaicsStyleSubMenu->addAction(tr("Separated mosaics"));
+	mosaicsSeparatedAct->setStatusTip(tr("Insert separated mosaics attribute"));
+	connect(mosaicsSeparatedAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x1a); });
+
+	QMenu *mosaicsHoldSubMenu = insertMenu->addMenu(tr("Mosaics hold"));
+	QAction *mosaicsHoldAct = mosaicsHoldSubMenu->addAction(tr("Hold mosaics"));
+	mosaicsHoldAct->setStatusTip(tr("Insert hold mosaics attribute"));
+	connect(mosaicsHoldAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x1e); });
+	QAction *mosaicsReleaseAct = mosaicsHoldSubMenu->addAction(tr("Release mosaics"));
+	mosaicsReleaseAct->setStatusTip(tr("Insert release mosaics attribute"));
+	connect(mosaicsReleaseAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x1f); });
+
+	QMenu *backgroundColourSubMenu = insertMenu->addMenu(tr("Background colour"));
+	QAction *backgroundNewAct = backgroundColourSubMenu->addAction(tr("New background"));
+	backgroundNewAct->setStatusTip(tr("Insert new background attribute"));
+	connect(backgroundNewAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x1d); });
+	QAction *backgroundBlackAct = backgroundColourSubMenu->addAction(tr("Black background"));
+	backgroundBlackAct->setStatusTip(tr("Insert black background attribute"));
+	connect(backgroundBlackAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x1c); });
+
+	QMenu *textSizeSubMenu = insertMenu->addMenu(tr("Text size"));
+	QAction *textSizeNormalAct = textSizeSubMenu->addAction(tr("Normal size"));
+	textSizeNormalAct->setStatusTip(tr("Insert normal size attribute"));
+	connect(textSizeNormalAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x0c); });
+	QAction *textSizeHeightAct = textSizeSubMenu->addAction(tr("Double height"));
+	textSizeHeightAct->setStatusTip(tr("Insert double height attribute"));
+	connect(textSizeHeightAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x0d); });
+	QAction *textSizeWidthAct = textSizeSubMenu->addAction(tr("Double width"));
+	textSizeWidthAct->setStatusTip(tr("Insert double width attribute"));
+	connect(textSizeWidthAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x0e); });
+	QAction *textSizeDoubleAct = textSizeSubMenu->addAction(tr("Double size"));
+	textSizeDoubleAct->setStatusTip(tr("Insert double size attribute"));
+	connect(textSizeDoubleAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x0f); });
+
+	QAction *concealAct = insertMenu->addAction(tr("Conceal"));
+	concealAct->setStatusTip(tr("Insert conceal attribute"));
+	connect(concealAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x18); });
+
+	QMenu *flashSubMenu = insertMenu->addMenu(tr("Flash"));
+	QAction *flashFlashingAct = flashSubMenu->addAction(tr("Flashing"));
+	flashFlashingAct->setStatusTip(tr("Insert flashing attribute"));
+	connect(flashFlashingAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x08); });
+	QAction *flashSteadyAct = flashSubMenu->addAction(tr("Steady"));
+	flashSteadyAct->setStatusTip(tr("Insert steady attribute"));
+	connect(flashSteadyAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x09); });
+
+	QMenu *boxingSubMenu = insertMenu->addMenu(tr("Box"));
+	QAction *boxingStartAct = boxingSubMenu->addAction(tr("Start box"));
+	boxingStartAct->setStatusTip(tr("Insert start box attribute"));
+	connect(boxingStartAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x0b); });
+	QAction *boxingEndAct = boxingSubMenu->addAction(tr("End box"));
+	boxingEndAct->setStatusTip(tr("Insert end box attribute"));
+	connect(boxingEndAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x0a); });
+
+	QAction *escSwitchAct = insertMenu->addAction(tr("ESC/switch"));
+	escSwitchAct->setStatusTip(tr("Insert ESC/switch character set attribute"));
+	connect(escSwitchAct, &QAction::triggered, [=]() { m_textWidget->setCharacter(0x1b); });
+
+	QMenu *toolsMenu = menuBar()->addMenu(tr("&Tools"));
+
+	toolsMenu->addAction(m_pageOptionsDock->toggleViewAction());
+	toolsMenu->addAction(m_x26Dock->toggleViewAction());
+	toolsMenu->addAction(m_x28Dock->toggleViewAction());
+	toolsMenu->addAction(m_paletteDock->toggleViewAction());
+
+	//FIXME is this main menubar separator to put help menu towards the right?
+	menuBar()->addSeparator();
+
+	QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
+	QAction *aboutAct = helpMenu->addAction(tr("&About"), this, &MainWindow::about);
+	aboutAct->setStatusTip(tr("Show the application's About box"));
+
+#ifndef QT_NO_CLIPBOARD
+/*
+	cutAct->setEnabled(false);
+	copyAct->setEnabled(false);
+	connect(textWidget, &QTextEdit::copyAvailable, cutAct, &QAction::setEnabled);
+	connect(textWidget, &QTextEdit::copyAvailable, copyAct, &QAction::setEnabled);
+*/
+#endif // !QT_NO_CLIPBOARD
+}
+
+void MainWindow::setSceneDimensions()
+{
+	const float aspectRatioHorizontalScaling[4] = { 0.6, 0.6, 0.8, 0.5 };
+	const int topBottomBorders[3] = { 0, 10, 19 };
+	const int leftRightBorders[3][2] = { { 0, 0 }, { 24, 72 }, { 77, 183 } };
+	int newSceneWidth;
+
+	int newViewAspectRatio = m_viewAspectRatio; // In case we need to narrow the characters to fit wide side panels in 4:3
+	if (m_viewBorder == 0)
+		newSceneWidth = m_textWidget->width();
+	else
+		newSceneWidth = 480+leftRightBorders[m_viewBorder][newViewAspectRatio == 1]*2;
+
+	//FIXME find a better way of narrowing characters to squeeze in side panels
+	if (m_viewAspectRatio != 1 && m_textWidget->width() > 576)
+		newViewAspectRatio = 3;
+
+	m_textScene->setSceneRect(0, 0, newSceneWidth, 250+topBottomBorders[m_viewBorder]*2);
+	m_fullScreenTopRectItem->setRect(0, 0, newSceneWidth, topBottomBorders[m_viewBorder]);
+	m_fullScreenBottomRectItem->setRect(0, 250+topBottomBorders[m_viewBorder], newSceneWidth, topBottomBorders[m_viewBorder]);
+	m_textView->setTransform(QTransform((1+(float)m_viewZoom/2)*aspectRatioHorizontalScaling[newViewAspectRatio], 0, 0, 1+(float)m_viewZoom/2, 0, 0));
+	if (m_viewBorder == 0)
+		m_textProxyWidget->setPos(0, 0);
+	else
+		m_textProxyWidget->setPos(leftRightBorders[m_viewBorder][newViewAspectRatio == 1]-(m_textWidget->width()-480)/2, topBottomBorders[m_viewBorder]);
+	for (int r=0; r<25; r++) {
+		m_fullRowLeftRectItem[r]->setRect(0, topBottomBorders[m_viewBorder]+r*10, m_textWidget->x()+1, 10);
+		m_fullRowRightRectItem[r]->setRect(m_textWidget->x()+m_textWidget->width()-1, topBottomBorders[m_viewBorder]+r*10, m_textWidget->x()+1, 10);
+	}
+}
+
+void MainWindow::insertSubPage(bool afterCurrentSubPage, bool copyCurrentSubPage)
+{
+	QUndoCommand *insertSubPageCommand = new InsertSubPageCommand(m_textWidget->document(), afterCurrentSubPage, copyCurrentSubPage);
+	m_textWidget->document()->undoStack()->push(insertSubPageCommand);
+}
+
+void MainWindow::setBorder(int newViewBorder)
+{
+	m_viewBorder = newViewBorder;
+	setSceneDimensions();
+}
+
+void MainWindow::setAspectRatio(int newViewAspectRatio)
+{
+	m_viewAspectRatio = newViewAspectRatio;
+	setSceneDimensions();
+}
+
+void MainWindow::zoomIn()
+{
+	if (m_viewZoom < 4)
+		m_viewZoom++;
+	setSceneDimensions();
+}
+
+void MainWindow::zoomOut()
+{
+	if (m_viewZoom > 0)
+		m_viewZoom--;
+	setSceneDimensions();
+}
+
+void MainWindow::zoomReset()
+{
+	m_viewZoom = 2;
+	setSceneDimensions();
+}
+
+void MainWindow::createStatusBar()
+{
+	m_cursorStatus = new QLabel("Subpage 1/1 row 1 column 1");
+	statusBar()->insertWidget(0, m_cursorStatus);
+	m_levelSelect = new QLabel("Level");
+	statusBar()->addPermanentWidget(m_levelSelect);
+
+	QRadioButton *level1 = new QRadioButton("1");
+	QRadioButton *level15 = new QRadioButton("1.5");
+	QRadioButton *level25 = new QRadioButton("2.5");
+	QRadioButton *level35 = new QRadioButton("3.5");
+	statusBar()->addPermanentWidget(level1);
+	statusBar()->addPermanentWidget(level15);
+	statusBar()->addPermanentWidget(level25);
+	statusBar()->addPermanentWidget(level35);
+	level1->toggle();
+	connect(level1, &QAbstractButton::clicked, [=]() { m_textWidget->pageRender()->setRenderLevel(0); m_textWidget->update(); });
+	connect(level15, &QAbstractButton::clicked, [=]() { m_textWidget->pageRender()->setRenderLevel(1); m_textWidget->update(); });
+	connect(level25, &QAbstractButton::clicked, [=]() { m_textWidget->pageRender()->setRenderLevel(2); m_textWidget->update(); });
+	connect(level35, &QAbstractButton::clicked, [=]() { m_textWidget->pageRender()->setRenderLevel(3); m_textWidget->update(); });
+	statusBar()->showMessage(tr("Ready"));
+}
+
+void MainWindow::readSettings()
+{
+	//TODO window sizing
+	QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+	const QByteArray geometry = settings.value("geometry", QByteArray()).toByteArray();
+	const QByteArray windowState = settings.value("windowState", QByteArray()).toByteArray();
+
+	m_viewBorder = settings.value("border", 2).toInt();
+	m_viewBorder = (m_viewBorder < 0 || m_viewBorder > 2) ? 2 : m_viewBorder;
+	m_borderActs[m_viewBorder]->setChecked(true);
+	m_viewAspectRatio = settings.value("aspectratio", 0).toInt();
+	m_viewAspectRatio = (m_viewAspectRatio < 0 || m_viewAspectRatio > 2) ? 0 : m_viewAspectRatio;
+	m_aspectRatioActs[m_viewAspectRatio]->setChecked(true);
+	m_viewZoom = settings.value("zoom", 2).toInt();
+	m_viewZoom = (m_viewZoom < 0 || m_viewZoom > 4) ? 2 : m_viewZoom;
+
+	// zoom 0 = 420,426px, 1 = 620,570px, 2 = 780,720px
+	if (geometry.isEmpty()) {
+		const QRect availableGeometry = QGuiApplication::primaryScreen()->availableGeometry();
+		if (availableGeometry.width() < 620 || availableGeometry.height() < 570) {
+			resize(430, 430);
+			m_viewZoom = 0;
+		} else if (availableGeometry.width() < 780 || availableGeometry.height() < 720) {
+			resize(620, 570);
+			m_viewZoom = 1;
+		} else
+			resize(780, 720);
+//			m_viewZoom = 2;
+		move((availableGeometry.width() - width()) / 2, (availableGeometry.height() - height()) / 2);
+	} else
+		restoreGeometry(geometry);
+	if (windowState.isEmpty()) {
+		m_x26Dock->hide();
+		m_x26Dock->setFloating(true);
+		m_x28Dock->hide();
+		m_x26Dock->setFloating(true);
+		m_pageOptionsDock->hide();
+		m_pageOptionsDock->setFloating(true);
+		m_paletteDock->hide();
+		m_paletteDock->setFloating(true);
+	} else
+		restoreState(windowState);
+}
+
+void MainWindow::writeSettings()
+{
+	QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+	settings.setValue("geometry", saveGeometry());
+	settings.setValue("windowState", saveState());
+	settings.setValue("border", m_viewBorder);
+	settings.setValue("aspectratio", m_viewAspectRatio);
+	settings.setValue("zoom", m_viewZoom);
+}
+
+bool MainWindow::maybeSave()
+{
+	if (m_textWidget->document()->undoStack()->isClean())
+		return true;
+	const QMessageBox::StandardButton ret = QMessageBox::warning(this, tr("QTeletextMaker"), tr("The document has been modified.\nDo you want to save your changes?"), QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
+	switch (ret) {
+		case QMessageBox::Save:
+			return save();
+		case QMessageBox::Cancel:
+			return false;
+		default:
+			break;
+	}
+	return true;
+}
+
+void MainWindow::loadFile(const QString &fileName)
+{
+	QFile file(fileName);
+	if (!file.open(QFile::ReadOnly | QFile::Text)) {
+		QMessageBox::warning(this, tr("QTeletextMaker"), tr("Cannot read file %1:\n%2.").arg(QDir::toNativeSeparators(fileName), file.errorString()));
+		setCurrentFile(QString());
+		return;
+	}
+
+	QApplication::setOverrideCursor(Qt::WaitCursor);
+	m_textWidget->document()->loadDocument(&file);
+
+	QApplication::restoreOverrideCursor();
+
+	setCurrentFile(fileName);
+	statusBar()->showMessage(tr("File loaded"), 2000);
+}
+
+void MainWindow::setRecentFilesVisible(bool visible)
+{
+	m_recentFileSubMenuAct->setVisible(visible);
+	m_recentFileSeparator->setVisible(visible);
+}
+
+static inline QString recentFilesKey() { return QStringLiteral("recentFileList"); }
+static inline QString fileKey() { return QStringLiteral("file"); }
+
+static QStringList readRecentFiles(QSettings &settings)
+{
+	QStringList result;
+	const int count = settings.beginReadArray(recentFilesKey());
+	for (int i = 0; i < count; ++i) {
+		settings.setArrayIndex(i);
+		result.append(settings.value(fileKey()).toString());
+	}
+	settings.endArray();
+	return result;
+}
+
+static void writeRecentFiles(const QStringList &files, QSettings &settings)
+{
+	const int count = files.size();
+	settings.beginWriteArray(recentFilesKey());
+	for (int i = 0; i < count; ++i) {
+		settings.setArrayIndex(i);
+		settings.setValue(fileKey(), files.at(i));
+	}
+	settings.endArray();
+}
+
+bool MainWindow::hasRecentFiles()
+{
+	QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+	const int count = settings.beginReadArray(recentFilesKey());
+	settings.endArray();
+	return count > 0;
+}
+
+void MainWindow::prependToRecentFiles(const QString &fileName)
+{
+	QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+
+	const QStringList oldRecentFiles = readRecentFiles(settings);
+	QStringList recentFiles = oldRecentFiles;
+	recentFiles.removeAll(fileName);
+	recentFiles.prepend(fileName);
+	if (oldRecentFiles != recentFiles)
+		writeRecentFiles(recentFiles, settings);
+
+	setRecentFilesVisible(!recentFiles.isEmpty());
+}
+
+void MainWindow::updateRecentFileActions()
+{
+	QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+
+	const QStringList recentFiles = readRecentFiles(settings);
+	const int count = qMin(int(m_MaxRecentFiles), recentFiles.size());
+	int i = 0;
+	for ( ; i < count; ++i) {
+		const QString fileName = MainWindow::strippedName(recentFiles.at(i));
+		m_recentFileActs[i]->setText(tr("&%1 %2").arg(i + 1).arg(fileName));
+		m_recentFileActs[i]->setData(recentFiles.at(i));
+		m_recentFileActs[i]->setVisible(true);
+	}
+	for ( ; i < m_MaxRecentFiles; ++i)
+		m_recentFileActs[i]->setVisible(false);
+}
+
+void MainWindow::openRecentFile()
+{
+	if (const QAction *action = qobject_cast<const QAction *>(sender()))
+		openFile(action->data().toString());
+}
+
+bool MainWindow::saveFile(const QString &fileName)
+{
+	QFile file(fileName);
+	if (!file.open(QFile::WriteOnly | QFile::Text)) {
+		QMessageBox::warning(this, tr("QTeletextMaker"), tr("Cannot write file %1:\n%2.").arg(QDir::toNativeSeparators(fileName), file.errorString()));
+		return false;
+	}
+
+	QTextStream out(&file);
+	out.setCodec("ISO-8859-1");
+	QApplication::setOverrideCursor(Qt::WaitCursor);
+	m_textWidget->document()->saveDocument(&out);
+	QApplication::restoreOverrideCursor();
+
+	setCurrentFile(fileName);
+	statusBar()->showMessage(tr("File saved"), 2000);
+	return true;
+}
+
+void MainWindow::setCurrentFile(const QString &fileName)
+{
+	static int sequenceNumber = 1;
+
+	m_isUntitled = fileName.isEmpty();
+	if (m_isUntitled)
+		m_curFile = tr("untitled%1.tti").arg(sequenceNumber++);
+	else
+		m_curFile = QFileInfo(fileName).canonicalFilePath();
+
+	m_textWidget->document()->undoStack()->setClean();
+
+	if (!m_isUntitled && windowFilePath() != m_curFile)
+		MainWindow::prependToRecentFiles(m_curFile);
+
+	setWindowFilePath(m_curFile);
+}
+
+QString MainWindow::strippedName(const QString &fullFileName)
+{
+	return QFileInfo(fullFileName).fileName();
+}
+
+MainWindow *MainWindow::findMainWindow(const QString &fileName) const
+{
+	QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
+
+	foreach (QWidget *widget, QApplication::topLevelWidgets()) {
+		MainWindow *mainWin = qobject_cast<MainWindow *>(widget);
+		if (mainWin && mainWin->m_curFile == canonicalFilePath)
+			return mainWin;
+	}
+
+	return 0;
+}
+
+void MainWindow::updateCursorPosition()
+{
+	m_cursorStatus->setText(QString("Subpage %1/%2 row %3 column %4").arg(m_textWidget->document()->currentSubPageIndex()+1).arg(m_textWidget->document()->numberOfSubPages()).arg(m_textWidget->document()->cursorRow()).arg(m_textWidget->document()->cursorColumn()));
+}
+
+void MainWindow::updatePageWidgets()
+{
+	updateCursorPosition();
+	m_paletteDock->updateAllColourButtons();
+	m_x26Dock->loadX26List();
+	m_x28Dock->updateWidgets();
+	m_pageOptionsDock->updateWidgets();
+}

mainwindow.h

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QCheckBox>
+#include <QComboBox>
+#include <QGraphicsProxyWidget>
+#include <QGraphicsScene>
+#include <QGraphicsView>
+#include <QMainWindow>
+#include <QLabel>
+
+#include "mainwidget.h"
+#include "pageoptionsdockwidget.h"
+#include "palettedockwidget.h"
+#include "x26dockwidget.h"
+#include "x28dockwidget.h"
+
+class QAction;
+class QMenu;
+class TeletextWidget;
+
+class MainWindow : public QMainWindow
+{
+	Q_OBJECT
+
+public:
+	MainWindow();
+	explicit MainWindow(const QString &fileName);
+
+	void tile(const QMainWindow *previous);
+
+protected:
+	void closeEvent(QCloseEvent *event) override;
+
+private slots:
+	void newFile();
+	void open();
+	bool save();
+	bool saveAs();
+	void exportURL();
+	void updateRecentFileActions();
+	void openRecentFile();
+	void about();
+	void updatePageWidgets();
+	void updateCursorPosition();
+
+	void insertSubPage(bool, bool);
+
+	void setSceneDimensions();
+	void setBorder(int);
+	void setAspectRatio(int);
+	void zoomIn();
+	void zoomOut();
+	void zoomReset();
+
+	void updateFullScreenRectItems(QColor);
+	void updateFullRowRectItems(int, QColor);
+
+private:
+	enum { m_MaxRecentFiles = 10 };
+
+	void init();
+	void createActions();
+	void createStatusBar();
+	void readSettings();
+	void writeSettings();
+	bool maybeSave();
+	void openFile(const QString &fileName);
+	void loadFile(const QString &fileName);
+	static bool hasRecentFiles();
+	void prependToRecentFiles(const QString &fileName);
+	void setRecentFilesVisible(bool visible);
+	bool saveFile(const QString &fileName);
+	void setCurrentFile(const QString &fileName);
+	static QString strippedName(const QString &fullFileName);
+	MainWindow *findMainWindow(const QString &fileName) const;
+
+	TeletextWidget *m_textWidget;
+	QGraphicsScene *m_textScene;
+	QGraphicsProxyWidget *m_textProxyWidget;
+	QGraphicsView *m_textView;
+	QGraphicsRectItem *m_fullScreenTopRectItem, *m_fullScreenBottomRectItem;
+	QGraphicsRectItem *m_fullRowLeftRectItem[25], *m_fullRowRightRectItem[25];
+
+	int m_viewBorder, m_viewAspectRatio, m_viewZoom;
+	PaletteDockWidget *m_paletteDock;
+	X26DockWidget *m_x26Dock;
+	X28DockWidget *m_x28Dock;
+	PageOptionsDockWidget *m_pageOptionsDock;
+
+	QAction *m_recentFileActs[m_MaxRecentFiles];
+	QAction *m_recentFileSeparator;
+	QAction *m_recentFileSubMenuAct;
+	QAction *m_borderActs[3];
+	QAction *m_aspectRatioActs[4];
+
+	QLabel *m_cursorStatus, *m_levelSelect;
+
+	QString m_curFile;
+	bool m_isUntitled;
+};
+
+#endif

page.cpp

@@ -0,0 +1,445 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QByteArray>
+#include <QColor>
+#include <QList>
+#include <QString>
+#include <algorithm>
+
+#include "page.h"
+
+TeletextPage::TeletextPage()
+{
+	clearPage();
+}
+
+// So far we only call clearPage() once, within the constructor
+void TeletextPage::clearPage()
+{
+	for (int r=0; r<25; r++)
+		for (int c=0; c<40; c++)
+			m_level1Page[r][c] = 0x20;
+	for (int i=0; i<8; i++)
+		m_controlBits[i] = false;
+/*	m_subPageNumber = 0x0000; */
+	m_cycleValue = 8;
+	m_cycleType = CTseconds;
+	m_defaultCharSet = 0;
+	m_defaultNOS = 0;
+	m_secondCharSet = 0xf;
+	m_secondNOS = 0x7;
+
+	m_defaultScreenColour = 0;
+	m_defaultRowColour = 0;
+	m_blackBackgroundSubst = false;
+	m_colourTableRemap = 0;
+	m_leftSidePanelDisplayed = m_rightSidePanelDisplayed = false;
+	m_sidePanelStatusL25 = true;
+	m_sidePanelColumns = 0;
+	std::copy(defaultCLUT, defaultCLUT+32, m_CLUT);
+//	If clearPage() is called outside constructor, we need to implement localEnhance.clear();
+}
+
+void TeletextPage::loadPagePacket(QByteArray &inLine)
+{
+	bool lineNumberOk;
+	int lineNumber, secondCommaPosition;
+
+	secondCommaPosition = inLine.indexOf(",", 3);
+	if (secondCommaPosition != 4 && secondCommaPosition != 5)
+		return;
+	lineNumber = inLine.mid(3, secondCommaPosition-3).toInt(&lineNumberOk, 10);
+	if (lineNumberOk && lineNumber>=0 && lineNumber<=31) {
+		inLine.remove(0, secondCommaPosition+1);
+		if (lineNumber<=24) {
+			for (int i=0, j=0; j<=39; i++, j++) {
+				if (i == inLine.size())
+					break;
+				int myChar = inLine.at(i);
+				if (myChar & 0x80)
+					myChar &= 0x7f;
+				else if (myChar == 0x10)
+					myChar = 0x0d;
+				else if (myChar == 0x1b) {
+					i++;
+					myChar = inLine.at(i)-0x40;
+				}
+				setCharacter(lineNumber, j, myChar);
+			}
+		}
+		if (lineNumber == 26) {
+			int designationCode = inLine.at(0) & 0x3f;
+
+			// TODO deal with gaps or out of order X26 designation codes in a more graceful way
+			// At the moment gaps are dealt with by simply inserting "dummy" reserved 11110 Row
+			// Triplets in case Local Objects are referenced within.
+			// Out of order X26 designation codes aren't handled at all!
+			if (designationCode*13 != localEnhance.size()) {
+				qDebug("Gap or out of order X26 designation code");
+				X26Triplet paddingX26Triplet;
+
+				paddingX26Triplet.setAddress(41);
+				paddingX26Triplet.setMode(0x1e);
+				paddingX26Triplet.setData(0);
+				while (localEnhance.size() < designationCode*13)
+					localEnhance.append(paddingX26Triplet);
+			}
+
+			// Round loop counter to nearest multiple of 3 so an incomplete triplet doesn't crash us
+			int inLineLength = (((inLine.size() <= 39) ? inLine.size() : 39) / 3) * 3;
+
+			for (int i=1; i<inLineLength; i+=3) {
+				X26Triplet newX26Triplet;
+
+				newX26Triplet.setAddress(inLine.at(i) & 0x3f);
+				newX26Triplet.setMode(inLine.at(i+1) & 0x1f);
+				newX26Triplet.setData(((inLine.at(i+2) & 0x3f) << 1) | ((inLine.at(i+1) & 0x20) >> 5));
+				localEnhance.append(newX26Triplet);
+				// Break out of loop if termination marker (without a "...follow") is encountered
+				if (newX26Triplet.mode() == 0x1f && newX26Triplet.address() == 0x3f && newX26Triplet.data() & 0x01)
+					break;
+			}
+		}
+		if (lineNumber == 28) {
+			int offset;
+
+			int designationCode = inLine.at(0) & 0x3f;
+			switch (designationCode) {
+				case 0:
+					offset = 16;
+					break;
+				case 4:
+					offset = 0;
+					break;
+				default:
+					offset = -1;
+					break;
+			}
+			if (offset >= 0) {
+				int x28Triplets[13];
+
+				for (int i=1, j=0; i<39; i+=3, j++) {
+					x28Triplets[j] = ((inLine.at(i+2) & 0x3f) << 12) | ((inLine.at(i+1) & 0x3f) << 6) | (inLine.at(i) & 0x3f);
+				}
+
+				m_defaultCharSet = (x28Triplets[0] >> 10) & 0xF;
+				m_defaultNOS = (x28Triplets[0] >> 7) & 0x7;
+				m_secondCharSet = ((x28Triplets[1] << 1) & 0xE) | ((x28Triplets[0] >> 17) & 0x1);
+				m_secondNOS = (x28Triplets[0] >> 14) & 0x7;
+
+				m_leftSidePanelDisplayed = (x28Triplets[1] >> 3) & 1;
+				m_rightSidePanelDisplayed = (x28Triplets[1] >> 4) & 1;
+				m_sidePanelStatusL25 = (x28Triplets[1] >> 5) & 1;
+				m_sidePanelColumns = (x28Triplets[1] >> 6) & 0xF;
+
+				for (int c=0; c<16; c++) {
+					int rtr = ((c * 12) + 28) / 18;
+					int rsh = ((c * 12) + 28) % 18;
+					int r = (x28Triplets[rtr] >> rsh) & 0xF;
+					if (rsh == 16)
+						r |= (x28Triplets[rtr+1] & 3) << 2;
+
+					int gtr = ((c * 12) + 32) / 18;
+					int gsh = ((c * 12) + 32) % 18;
+					int g = (x28Triplets[gtr] >> gsh) & 0xF;
+					if (gsh == 16)
+						g |= (x28Triplets[gtr+1] & 3) << 2;
+
+					int btr = ((c * 12) + 36) / 18;
+					int bsh = ((c * 12) + 36) % 18;
+					int b = (x28Triplets[btr] >> bsh) & 0xF;
+					if (bsh == 16)
+						b |= (x28Triplets[btr+1] & 3) << 2;
+
+					m_CLUT[offset+c] = (r << 8) | (g << 4) | b;
+				}
+				m_defaultScreenColour = (x28Triplets[12] >> 4) & 0x1f;
+				m_defaultRowColour = (x28Triplets[12] >> 9) & 0x1f;
+				m_blackBackgroundSubst = ((x28Triplets[12] >> 14) & 1);
+				m_colourTableRemap = (x28Triplets[12] >> 15) & 7;
+			}
+		}
+	} //TODO panic if invalid line number is encountered
+}
+
+void TeletextPage::savePage(QTextStream *outStream, int pageNumber, int subPageNumber)
+{
+//	int pageStatus = 0x8000 | (controlBits[0] << 14) | ((defaultPageNOS & 1) << 9) | ((defaultPageNOS & 2) << 7) | ((defaultPageNOS & 4) << 5);
+//	for (int i=1; i<8; i++)
+//		pageStatus |= controlBits[i] << i;
+	*outStream << QString("PN,%1%2").arg(pageNumber, 3, 16, QChar('0')).arg(subPageNumber & 0xff, 2, 16, QChar('0')) << endl;
+	*outStream << QString("SC,%1").arg(subPageNumber, 4, 16, QChar('0')) << endl;
+	*outStream << QString("PS,%1").arg(0x8000 | controlBitsToPS(), 4, 16, QChar('0')) << endl;
+	*outStream << QString("CT,%1,%2").arg(m_cycleValue).arg(m_cycleType==CTcycles ? 'C' : 'T') << endl;
+	//TODO RE and maybe FLOF?
+	if (int x28Result = x28Needed()) {
+		if (x28Result & 1)
+			*outStream << "OL,28," << x28toTTI(0) << endl;
+		if (x28Result & 2)
+			*outStream << "OL,28," << x28toTTI(4) << endl;
+	}
+	if (!localEnhance.isEmpty()) {
+		int tripletNumber = 0;
+		X26Triplet lastTriplet = localEnhance.at(localEnhance.size()-1);
+		int terminatorNeeded = true; // Becomes false if a termination marker (without a "...follow") is already at the end
+
+		if (lastTriplet.mode() == 0x1f && lastTriplet.address() == 0x3f)
+			if (lastTriplet.data() & 0x01)
+				terminatorNeeded = false;
+			else
+				// Last termination marker has "follow" set but nothing follows, so write another one afterwards
+				lastTriplet.setData(lastTriplet.data() | 0x01);
+		else {
+			// No termination marker there, so make up one
+			lastTriplet.setAddress(0x3f);
+			lastTriplet.setMode(0x1f);
+			lastTriplet.setData(0x07);
+		}
+
+		for (int d=0; d<16; d++) {
+			*outStream << "OL,26," << (char)(d | 0x40);
+			for (int t=0; t<13; t++) {
+				if (tripletNumber < localEnhance.size()) {
+					*outStream << (char)(0x40 | localEnhance.at(tripletNumber).address());
+					*outStream << (char)(0x40 | (localEnhance.at(tripletNumber).mode() | ((localEnhance.at(tripletNumber).data() & 1) << 5)));
+					*outStream << (char)(0x40 | (localEnhance.at(tripletNumber).data() >> 1));
+				} else {
+					*outStream << (char)(0x40 | lastTriplet.address());
+					*outStream << (char)(0x40 | (lastTriplet.mode() | ((lastTriplet.data() & 1) << 5)));
+					*outStream << (char)(0x40 | (lastTriplet.data() >> 1));
+					terminatorNeeded = false;
+				}
+				tripletNumber++;
+			}
+			*outStream << endl;
+			// If the last triplet of the last X26 row wasn't a termination marker,
+			// terminatorNeeded ensures we write an additional X26 row full of termination markers.
+			if (!terminatorNeeded && tripletNumber >= localEnhance.size())
+				break;
+		}
+	}
+	for (int r=1; r<25; r++) {
+		bool blankRow = true;
+		QString rowString;
+
+		rowString.append(QString("OL,%1,").arg(r));
+		for (int c=0; c<40; c++) {
+			unsigned char myChar = m_level1Page[r][c];
+			if (myChar != 0x20)
+				blankRow = false;
+			if (myChar < 32) {
+				rowString.append((char)0x1b);
+				rowString.append((char)(myChar+0x40));
+			} else
+				rowString.append((char)myChar);
+		}
+		if (!blankRow)
+			*outStream << rowString << endl;
+	}
+}
+
+int TeletextPage::controlBitsToPS() const
+{
+	//TODO map page language for regions other than 0
+	int pageStatus = 0x8000 | (m_controlBits[0] << 14) | ((m_defaultNOS & 1) << 9) | ((m_defaultNOS & 2) << 7) | ((m_defaultNOS & 4) << 5);
+	for (int i=1; i<8; i++)
+		pageStatus |= m_controlBits[i] << (i-1);
+	return pageStatus;
+}
+
+QString TeletextPage::x28toTTI(int designationCode)
+{
+	QString result;
+	int x28Triplets[13] = {0};
+
+	int offset;
+
+	switch (designationCode) {
+		case 0:
+			offset = 16;
+			break;
+		case 4:
+			offset = 0;
+			break;
+	}
+	result.append(designationCode + 0x40);
+
+	x28Triplets[0] = ((m_secondCharSet & 1) << 17) | (m_secondNOS << 14) | (m_defaultCharSet << 10) | (m_defaultNOS << 7);
+	x28Triplets[1] = (m_secondCharSet >> 1) | (m_leftSidePanelDisplayed << 3) | (m_rightSidePanelDisplayed << 4) | (m_sidePanelStatusL25 << 5) | (m_sidePanelColumns << 6);
+
+	for (int c=0; c<16; c++){
+		int r = (m_CLUT[offset+c] & 0xF00) >> 8;
+		int g = (m_CLUT[offset+c] & 0xF0) >> 4;
+		int b = m_CLUT[offset+c] & 0xF;
+
+		int rtr = ((c * 12) + 28) / 18;
+		int rsh = ((c * 12) + 28) % 18;
+		x28Triplets[rtr] |= (r << rsh);
+		if (rsh == 16)
+			x28Triplets[rtr+1] |= (r >> 2) & 3;
+
+		int gtr = ((c * 12) + 32) / 18;
+		int gsh = ((c * 12) + 32) % 18;
+		x28Triplets[gtr] |= (g << gsh);
+		if (gsh == 16)
+			x28Triplets[gtr+1] |= (g >> 2) & 3;
+
+		int btr = ((c * 12) + 36) / 18;
+		int bsh = ((c * 12) + 36) % 18;
+		x28Triplets[btr] |= (b << bsh);
+		if (bsh == 16)
+			x28Triplets[btr+1] |= (b >> 2) & 3;
+	}
+
+	x28Triplets[12] |= (m_defaultScreenColour << 4) | (m_defaultRowColour << 9) | (m_blackBackgroundSubst << 14) | (m_colourTableRemap << 15);
+	
+	for (int i=0; i<13; i++) {
+		result.append(0x40 | (x28Triplets[i] & 0x3F));
+		result.append(0x40 | ((x28Triplets[i] & 0xFC0) >> 6));
+		result.append(0x40 | ((x28Triplets[i] & 0x3F000) >> 12));
+	}
+
+	return result;
+}
+
+QString TeletextPage::exportURLHash(QString pageHash)
+{
+	int hashDigits[1167]={0};
+	int totalBits, charBit;
+	const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
+
+	//TODO deal with "black text allowed"
+	pageHash.append(QString("#%1:").arg(m_defaultNOS, 1, 16));
+	for (int r=0; r<25; r++) 
+		for (int c=0; c<40; c++)
+			for (int b=0; b<7; b++) {
+				totalBits = (r * 40 + c) * 7 + b;
+				charBit = ((m_level1Page[r][c]) >> (6 - b)) & 0x01;
+				hashDigits[totalBits / 6] |= charBit << (5 - (totalBits % 6));
+			}
+
+	for (int i=0; i<1167; i++)
+		pageHash.append(base64[hashDigits[i]]);
+
+//	CLUTChangedResult = CLUTChanged();
+//	if (leftSidePanel || rightSidePanel || defaultScreenColour !=0 || defaultRowColour !=0 || blackBackgroundSubst || colourTableRemap !=0 || CLUTChangedResult) {
+
+	if (int x28Result = x28Needed()) {
+		QString x28StringBegin, x28StringEnd;
+
+		x28StringBegin.append(QString("00%1").arg((m_defaultCharSet << 3) | m_defaultNOS, 2, 16, QChar('0')).toUpper());
+		x28StringBegin.append(QString("%1").arg((m_secondCharSet << 3) | m_secondNOS, 2, 16, QChar('0')).toUpper());
+		x28StringBegin.append(QString("%1%2%3%4").arg(m_leftSidePanelDisplayed, 1, 10).arg(m_rightSidePanelDisplayed, 1, 10).arg(m_sidePanelStatusL25, 1, 10).arg(m_sidePanelColumns, 1, 16));
+
+		x28StringEnd = QString("%1%2%3%4").arg(m_defaultScreenColour, 2, 16, QChar('0')).arg(m_defaultRowColour, 2, 16, QChar('0')).arg(m_blackBackgroundSubst, 1, 10).arg(m_colourTableRemap, 1, 10);
+
+		if (x28Result & 1) {
+			pageHash.append(":X280=");
+			pageHash.append(x28StringBegin);
+			pageHash.append(colourHash(1));
+			pageHash.append(x28StringEnd);
+		}
+		if (x28Result & 2) {
+			pageHash.append(":X284=");
+			pageHash.append(x28StringBegin);
+			pageHash.append(colourHash(0));
+			pageHash.append(x28StringEnd);
+		}
+	}
+
+	if (!localEnhance.isEmpty()) {
+		pageHash.append(":X26=");
+		for (int i=0; i<localEnhance.size(); i++) {
+			pageHash.append(base64[localEnhance.at(i).data() >> 1]);
+			pageHash.append(base64[localEnhance.at(i).mode() | ((localEnhance.at(i).data() & 1) << 5)]);
+			pageHash.append(base64[localEnhance.at(i).address()]);
+		}
+		//TODO need to add one or more terminators to X26
+	}
+	//TODO check if 0x8000 | is needed for zxnet
+	pageHash.append(QString(":PS=%1").arg(0x8000 | controlBitsToPS(), 0, 16, QChar('0')));
+	return pageHash;
+}
+
+/* void TeletextPage::setSubPageNumber(int newSubPageNumber) { m_subPageNumber = newSubPageNumber; } */
+void TeletextPage::setControlBit(int bitNumber, bool active) { m_controlBits[bitNumber] = active; }
+void TeletextPage::setCycleValue(int newValue) { m_cycleValue = newValue; };
+void TeletextPage::setCycleType(CycleTypeEnum newType) { m_cycleType = newType; }
+void TeletextPage::setDefaultCharSet(int newDefaultCharSet) { m_defaultCharSet = newDefaultCharSet; }
+void TeletextPage::setDefaultNOS(int newDefaultNOS) { m_defaultNOS = newDefaultNOS; }
+
+void TeletextPage::setSecondCharSet(int newSecondCharSet)
+{
+	m_secondCharSet = newSecondCharSet;
+	if (m_secondCharSet == 0xf)
+		m_secondNOS = 0x7;
+}
+
+void TeletextPage::setSecondNOS(int newSecondNOS) { m_secondNOS = newSecondNOS; }
+void TeletextPage::setCharacter(int row, int column, unsigned char newCharacter) { m_level1Page[row][column] = newCharacter; }
+void TeletextPage::setDefaultScreenColour(int newDefaultScreenColour) { m_defaultScreenColour = newDefaultScreenColour; }
+void TeletextPage::setDefaultRowColour(int newDefaultRowColour) { m_defaultRowColour = newDefaultRowColour; }
+void TeletextPage::setColourTableRemap(int newColourTableRemap) { m_colourTableRemap = newColourTableRemap; }
+void TeletextPage::setBlackBackgroundSubst(bool newBlackBackgroundSubst) { m_blackBackgroundSubst = newBlackBackgroundSubst; }
+
+int TeletextPage::CLUT(int index, int renderLevel) const
+{
+	if (renderLevel == 2)
+		return index>=16 ? m_CLUT[index] : defaultCLUT[index];
+	else
+		return renderLevel==3 ? m_CLUT[index] : defaultCLUT[index];
+}
+
+void TeletextPage::setCLUT(int index, int newColour) { m_CLUT[index] = newColour; }
+void TeletextPage::setLeftSidePanelDisplayed(bool newLeftSidePanelDisplayed) { m_leftSidePanelDisplayed = newLeftSidePanelDisplayed; }
+void TeletextPage::setRightSidePanelDisplayed(bool newRightSidePanelDisplayed) { m_rightSidePanelDisplayed = newRightSidePanelDisplayed; }
+void TeletextPage::setSidePanelColumns(int newSidePanelColumns) { m_sidePanelColumns = newSidePanelColumns; }
+void TeletextPage::setSidePanelStatusL25(bool newSidePanelStatusL25) { m_sidePanelStatusL25 = newSidePanelStatusL25; }
+
+int TeletextPage::x28Needed()
+{
+	int result = (m_leftSidePanelDisplayed || m_rightSidePanelDisplayed || m_defaultScreenColour !=0 || m_defaultRowColour !=0 || m_blackBackgroundSubst || m_colourTableRemap !=0 || m_defaultCharSet != 0 || m_secondCharSet != 0xf);
+
+	for (int i=0; i<16; i++)
+		if (m_CLUT[i] != defaultCLUT[i]) {
+			result |= 2;
+			break;
+		}
+	for (int i=16; i<32; i++)
+		if (m_CLUT[i] != defaultCLUT[i]) {
+			result |= 1;
+			break;
+		}
+	return result;
+}
+
+QString TeletextPage::colourHash(int whichCLUT)
+{
+	QString resultHash;
+
+	for (int i=whichCLUT*16; i<whichCLUT*16+16; i++)
+		resultHash.append(QString("%1").arg(m_CLUT[i], 3, 16, QChar('0')));
+	return resultHash;
+}
+
+QColor CLUTtoQColor(int myColour)
+{
+	return QColor(((myColour & 0xf00) >> 8) * 17, ((myColour & 0x0f0) >> 4) * 17, (myColour & 0x00f) * 17);
+}

page.h

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef PAGE_H
+#define PAGE_H
+
+#include <QByteArray>
+#include <QColor>
+#include <QList>
+#include <QObject>
+#include <QString>
+#include <QTextStream>
+
+#include "x26triplets.h"
+
+QColor CLUTtoQColor(int myColour);
+
+// If we inherit from QObject then we can't copy construct, so "make a new subpage that's a copy of this one" wouldn't work
+class TeletextPage //: public QObject
+{
+	//Q_OBJECT
+
+public:
+	enum CycleTypeEnum { CTcycles, CTseconds };
+
+	TeletextPage();
+	void clearPage();
+	void loadPagePacket(QByteArray &);
+	void savePage(QTextStream *, int, int);
+	QString exportURLHash(QString);
+
+/*	void setSubPageNumber(int); */
+	bool controlBit(int bitNumber) const { return m_controlBits[bitNumber]; }
+	void setControlBit(int, bool);
+	int cycleValue() const { return m_cycleValue; };
+	void setCycleValue(int);
+	CycleTypeEnum cycleType() const { return m_cycleType; };
+	void setCycleType(CycleTypeEnum);
+	int defaultCharSet() const { return m_defaultCharSet; }
+	void setDefaultCharSet(int);
+	int defaultNOS() const { return m_defaultNOS; }
+	void setDefaultNOS(int);
+	int secondCharSet() const { return m_secondCharSet; }
+	void setSecondCharSet(int);
+	int secondNOS() const { return m_secondNOS; }
+	void setSecondNOS(int);
+	unsigned char character(int row, int column) const { return m_level1Page[row][column]; }
+	void setCharacter(int, int, unsigned char);
+	int defaultScreenColour() const { return m_defaultScreenColour; }
+	void setDefaultScreenColour(int);
+	int defaultRowColour() const { return m_defaultRowColour; }
+	void setDefaultRowColour(int);
+	int colourTableRemap() const { return m_colourTableRemap; }
+	void setColourTableRemap(int);
+	bool blackBackgroundSubst() const { return m_blackBackgroundSubst; }
+	void setBlackBackgroundSubst(bool);
+	int CLUT(int index, int renderLevel=3) const;
+	void setCLUT(int, int);
+	bool leftSidePanelDisplayed() const { return m_leftSidePanelDisplayed; }
+	void setLeftSidePanelDisplayed(bool);
+	bool rightSidePanelDisplayed() const { return m_rightSidePanelDisplayed; }
+	void setRightSidePanelDisplayed(bool);
+	int sidePanelColumns() const { return m_sidePanelColumns; }
+	void setSidePanelColumns(int);
+	bool sidePanelStatusL25() const { return m_sidePanelStatusL25; }
+	void setSidePanelStatusL25(bool);
+	int x28Needed();
+	QString colourHash(int);
+	QList<X26Triplet> localEnhance;
+
+protected:
+	int controlBitsToPS() const;
+	QString x28toTTI(int);
+
+private:
+	unsigned char m_level1Page[25][40];
+/*	int m_subPageNumber; */
+	bool m_controlBits[8];
+	int m_cycleValue;
+	CycleTypeEnum m_cycleType;
+	int m_defaultCharSet, m_defaultNOS, m_secondCharSet, m_secondNOS;
+	int m_defaultScreenColour, m_defaultRowColour, m_colourTableRemap, m_sidePanelColumns;
+	bool m_blackBackgroundSubst, m_leftSidePanelDisplayed, m_rightSidePanelDisplayed, m_sidePanelStatusL25;
+	int m_CLUT[32];
+
+	const int defaultCLUT[32] = {
+	0x000, 0xf00, 0x0f0, 0xff0, 0x00f, 0xf0f, 0x0ff, 0xfff,
+	0x000, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0x777,
+	0xf05, 0xf70, 0x0f7, 0xffb, 0x0ca, 0x500, 0x652, 0xc77,
+	0x333, 0xf77, 0x7f7, 0xff7, 0x77f, 0xf7f, 0x7ff, 0xddd
+	};
+};
+
+#endif

pageoptionsdockwidget.cpp

@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QCheckBox>
+#include <QComboBox>
+#include <QGridLayout>
+#include <QGroupBox>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QLineEdit>
+#include <QSpinBox>
+#include <QVBoxLayout>
+
+#include "pageoptionsdockwidget.h"
+
+PageOptionsDockWidget::PageOptionsDockWidget(TeletextWidget *parent): QDockWidget(parent)
+{
+	QVBoxLayout *pageOptionsLayout = new QVBoxLayout;
+	QWidget *pageOptionsWidget = new QWidget;
+
+	m_parentMainWidget = parent;
+
+	this->setObjectName("PageOptionsDockWidget");
+	this->setWindowTitle("Page options");
+
+	// Page number
+	QHBoxLayout *pageNumberLayout = new QHBoxLayout;
+	pageNumberLayout->addWidget(new QLabel(tr("Page number")));
+	m_pageNumberEdit = new QLineEdit("100");
+	m_pageNumberEdit->setMaxLength(3);
+	m_pageNumberEdit->setInputMask("DHH");
+	//TODO restrict first digit of page number to 1-8
+	pageNumberLayout->addWidget(m_pageNumberEdit);
+	connect(m_pageNumberEdit, &QLineEdit::textEdited, m_parentMainWidget->document(), &TeletextDocument::setPageNumber);
+
+	pageOptionsLayout->addLayout(pageNumberLayout);
+
+	// Page description
+	m_pageDescriptionEdit = new QLineEdit();
+	m_pageDescriptionEdit->setPlaceholderText("Page description");
+	connect(m_pageDescriptionEdit, &QLineEdit::textEdited, m_parentMainWidget->document(), &TeletextDocument::setDescription);
+
+	pageOptionsLayout->addWidget(m_pageDescriptionEdit);
+
+	// FastText links
+	QGridLayout *fastTextLayout = new QGridLayout;
+	for (int i=0; i<6; i++) {
+		const char *fastTextLabel[] = { "Red", "Green", "Yellow" ,"Blue", "Next", "Index" };
+
+		fastTextLayout->addWidget(new QLabel(fastTextLabel[i]), 0, i, 1, 1, Qt::AlignCenter);
+		m_fastTextEdit[i] = new QLineEdit;
+		m_fastTextEdit[i]->setMaxLength(3);
+		m_fastTextEdit[i]->setInputMask("DHH");
+		//TODO restrict first digit of page number to 1-8
+		fastTextLayout->addWidget(m_fastTextEdit[i], 1, i, 1, 1);
+		connect(m_fastTextEdit[i], &QLineEdit::textEdited, [=](QString value) { m_parentMainWidget->document()->setFastTextLink(i, value); } );
+	}
+
+	pageOptionsLayout->addLayout(fastTextLayout);
+
+	QGroupBox *subPageGroupBox = new QGroupBox(tr("Subpage options"));
+	QVBoxLayout *subPageOptionsLayout = new QVBoxLayout;
+
+	// Cycle
+	QHBoxLayout *pageCycleLayout = new QHBoxLayout;
+	pageCycleLayout->addWidget(new QLabel(tr("Page cycle")));
+	m_cycleValueSpinBox = new QSpinBox;
+	m_cycleValueSpinBox->setRange(1, 99);
+	m_cycleValueSpinBox->setWrapping(true);
+	pageCycleLayout->addWidget(m_cycleValueSpinBox);
+	// Since TeletextPage doesn't inherit from QObject (so we can copy construct it) it doesn't have a slot
+	// to connect to, so we need to use a lambda
+	connect(m_cycleValueSpinBox, QOverload<int>::of(&QSpinBox::valueChanged), [=](int index) { m_parentMainWidget->document()->currentSubPage()->setCycleValue(index); } );
+	m_cycleTypeCombo = new QComboBox;
+	m_cycleTypeCombo->addItem("cycles");
+	m_cycleTypeCombo->addItem("seconds");
+	pageCycleLayout->addWidget(m_cycleTypeCombo);
+	connect(m_cycleTypeCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), [=](int index) { m_parentMainWidget->document()->currentSubPage()->setCycleType(index == 0 ? TeletextPage::CTcycles : TeletextPage::CTseconds); } );
+
+	subPageOptionsLayout->addLayout(pageCycleLayout);
+
+	// Page status bits
+	for (int i=0; i<=7; i++) {
+		const char *controlBitsLabel[] = { "C4 Erase page", "C5 Newsflash", "C6 Subtitle", "C7 Suppress header", "C8 Update page", "C9 Page not in sequence", "C10 Inhibit display", "C11 Serial magazine" };
+
+		m_controlBitsAct[i] = new QCheckBox(controlBitsLabel[i]);
+		subPageOptionsLayout->addWidget(m_controlBitsAct[i]);
+		connect(m_controlBitsAct[i], &QCheckBox::stateChanged, [=](bool active) { m_parentMainWidget->setControlBit(i, active); });
+	}
+
+	// Region and language
+	QGridLayout *regionLayout = new QGridLayout;
+	regionLayout->addWidget(new QLabel(tr("Region")), 0, 0, 1, 1);
+	m_defaultRegionCombo = new QComboBox;
+	addRegionList(m_defaultRegionCombo);
+
+	regionLayout->addWidget(m_defaultRegionCombo, 0, 1, 1, 1, Qt::AlignTop);
+	connect(m_defaultRegionCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), [=]{ setDefaultRegion(); });
+
+	m_defaultNOSCombo = new QComboBox;
+	regionLayout->addWidget(m_defaultNOSCombo, 0, 2, 1, 1, Qt::AlignTop);
+	connect(m_defaultNOSCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), [=]{ setDefaultNOS(); });
+
+	regionLayout->addWidget(new QLabel(tr("2nd region")), 1, 0, 1, 1);
+	m_secondRegionCombo = new QComboBox;
+	m_secondRegionCombo->addItem("Not needed", 15);
+	addRegionList(m_secondRegionCombo);
+	regionLayout->addWidget(m_secondRegionCombo, 1, 1, 1, 1, Qt::AlignTop);
+	connect(m_secondRegionCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), [=]{ setSecondRegion(); });
+
+	m_secondNOSCombo = new QComboBox;
+	regionLayout->addWidget(m_secondNOSCombo, 1, 2, 1, 1, Qt::AlignTop);
+	connect(m_secondNOSCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), [=]{ setSecondNOS(); });
+
+	subPageOptionsLayout->addLayout(regionLayout);
+
+	subPageGroupBox->setLayout(subPageOptionsLayout);
+	pageOptionsLayout->addWidget(subPageGroupBox);
+
+	pageOptionsLayout->addStretch(1);
+
+	pageOptionsWidget->setLayout(pageOptionsLayout);
+	this->setWidget(pageOptionsWidget);
+
+}
+
+void PageOptionsDockWidget::addRegionList(QComboBox *regionCombo)
+{
+	regionCombo->addItem("0", 0);
+	regionCombo->addItem("1", 1);
+	regionCombo->addItem("2", 2);
+	regionCombo->addItem("3", 3);
+	regionCombo->addItem("4", 4);
+	regionCombo->addItem("6", 6);
+	regionCombo->addItem("8", 8);
+	regionCombo->addItem("10", 10);
+}
+
+void PageOptionsDockWidget::updateWidgets()
+{
+	m_pageNumberEdit->blockSignals(true);
+	m_pageNumberEdit->setText(QString::number(m_parentMainWidget->document()->pageNumber(), 16).toUpper());
+	m_pageNumberEdit->blockSignals(false);
+	m_pageDescriptionEdit->blockSignals(true);
+	m_pageDescriptionEdit->setText(m_parentMainWidget->document()->description());
+	m_pageDescriptionEdit->blockSignals(false);
+	for (int i=0; i<6; i++) {
+		m_fastTextEdit[i]->blockSignals(true);
+		m_fastTextEdit[i]->setText(QString::number(m_parentMainWidget->document()->fastTextLink(i), 16).toUpper());
+		m_fastTextEdit[i]->blockSignals(false);
+	}
+	m_cycleValueSpinBox->blockSignals(true);
+	m_cycleValueSpinBox->setValue(m_parentMainWidget->document()->currentSubPage()->cycleValue());
+	m_cycleValueSpinBox->blockSignals(false);
+	m_cycleTypeCombo->blockSignals(true);
+	m_cycleTypeCombo->setCurrentIndex(m_parentMainWidget->document()->currentSubPage()->cycleType() == TeletextPage::CTseconds);
+	m_cycleTypeCombo->blockSignals(false);
+	for (int i=0; i<=7; i++) {
+		m_controlBitsAct[i]->blockSignals(true);
+		m_controlBitsAct[i]->setChecked(m_parentMainWidget->document()->currentSubPage()->controlBit(i));
+		m_controlBitsAct[i]->blockSignals(false);
+	}
+	m_defaultRegionCombo->blockSignals(true);
+	m_defaultRegionCombo->setCurrentText(QString::number(m_parentMainWidget->document()->currentSubPage()->defaultCharSet()));
+	m_defaultRegionCombo->blockSignals(false);
+	m_defaultNOSCombo->blockSignals(true);
+	updateDefaultNOSOptions();
+	m_defaultNOSCombo->setCurrentIndex(m_defaultNOSCombo->findData((m_parentMainWidget->document()->currentSubPage()->defaultCharSet() << 3) | m_parentMainWidget->document()->currentSubPage()->defaultNOS()));
+	m_defaultNOSCombo->blockSignals(false);
+	m_secondRegionCombo->blockSignals(true);
+	m_secondRegionCombo->setCurrentText(QString::number(m_parentMainWidget->document()->currentSubPage()->secondCharSet()));
+	m_secondRegionCombo->blockSignals(false);
+	m_secondNOSCombo->blockSignals(true);
+	updateSecondNOSOptions();
+	m_secondNOSCombo->setCurrentIndex(m_defaultNOSCombo->findData((m_parentMainWidget->document()->currentSubPage()->secondCharSet() << 3) | m_parentMainWidget->document()->currentSubPage()->secondNOS()));
+	m_secondNOSCombo->blockSignals(false);
+}
+
+void PageOptionsDockWidget::updateDefaultNOSOptions()
+{
+	while (m_defaultNOSCombo->count() > 0)
+		m_defaultNOSCombo->removeItem(0);
+	for (int i=0; i<languageComboBoxItemCount; i++)
+		if ((languageComboBoxItems[i].bits >> 3) == m_parentMainWidget->document()->currentSubPage()->defaultCharSet())
+			m_defaultNOSCombo->addItem(languageComboBoxItems[i].name, languageComboBoxItems[i].bits);
+}
+
+void PageOptionsDockWidget::updateSecondNOSOptions()
+{
+	while (m_secondNOSCombo->count() > 0)
+		m_secondNOSCombo->removeItem(0);
+	for (int i=0; i<languageComboBoxItemCount; i++)
+		if ((languageComboBoxItems[i].bits >> 3) == m_parentMainWidget->document()->currentSubPage()->secondCharSet())
+			m_secondNOSCombo->addItem(languageComboBoxItems[i].name, languageComboBoxItems[i].bits);
+}
+
+void PageOptionsDockWidget::setDefaultRegion()
+{
+	m_parentMainWidget->document()->currentSubPage()->setDefaultCharSet(m_defaultRegionCombo->currentData().toInt());
+	m_defaultNOSCombo->blockSignals(true);
+	updateDefaultNOSOptions();
+	setDefaultNOS();
+	m_defaultNOSCombo->blockSignals(false);
+	m_parentMainWidget->refreshPage();
+}
+
+void PageOptionsDockWidget::setDefaultNOS()
+{
+	m_parentMainWidget->document()->currentSubPage()->setDefaultNOS(m_defaultNOSCombo->currentData().toInt() & 0x07);
+	m_parentMainWidget->refreshPage();
+}
+
+void PageOptionsDockWidget::setSecondRegion()
+{
+	m_parentMainWidget->document()->currentSubPage()->setSecondCharSet(m_secondRegionCombo->currentData().toInt());
+	m_secondNOSCombo->blockSignals(true);
+	updateSecondNOSOptions();
+	setSecondNOS();
+	m_secondNOSCombo->blockSignals(false);
+	m_parentMainWidget->refreshPage();
+}
+
+void PageOptionsDockWidget::setSecondNOS()
+{
+	m_parentMainWidget->document()->currentSubPage()->setSecondNOS(m_secondNOSCombo->currentData().toInt() & 0x07);
+	m_parentMainWidget->refreshPage();
+}

pageoptionsdockwidget.h

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef PAGEOPTIONSDOCKWIDGET_H
+#define PAGEOPTIONSDOCKWIDGET_H
+
+#include <QCheckBox>
+#include <QComboBox>
+#include <QDockWidget>
+#include <QLineEdit>
+#include <QSpinBox>
+
+#include "mainwidget.h"
+
+class PageOptionsDockWidget : public QDockWidget
+{
+	Q_OBJECT
+
+public:
+	PageOptionsDockWidget(TeletextWidget *parent);
+	void updateWidgets();
+
+private:
+	TeletextWidget *m_parentMainWidget;
+	QLineEdit *m_pageNumberEdit, *m_pageDescriptionEdit;
+	QSpinBox *m_cycleValueSpinBox;
+	QComboBox *m_cycleTypeCombo;
+	QCheckBox *m_controlBitsAct[8];
+	QComboBox *m_defaultRegionCombo, *m_defaultNOSCombo, *m_secondRegionCombo, *m_secondNOSCombo;
+	QLineEdit *m_fastTextEdit[6];
+
+	void addRegionList(QComboBox *);
+	void setDefaultRegion();
+	void setDefaultNOS();
+	void setSecondRegion();
+	void setSecondNOS();
+	void updateDefaultNOSOptions();
+	void updateSecondNOSOptions();
+};
+
+struct languageComboBoxItem {
+	QString name;
+	int bits;
+};
+
+static const int languageComboBoxItemCount = 36;
+
+static const languageComboBoxItem languageComboBoxItems[languageComboBoxItemCount] {
+	{ "English", 0x00 } ,
+	{ "German", 0x01 } ,
+	{ "Swedish/Finnish/Hungarian", 0x02 } ,
+	{ "Italian", 0x03 } ,
+	{ "French", 0x04 } ,
+	{ "Portuguese/Spanish", 0x05 } ,
+	{ "Czech/Slovak", 0x06 } ,
+
+	{ "Polish", 0x08 } ,
+	{ "German", 0x09 } ,
+	{ "Swedish/Finnish/Hungarian", 0x0a } ,
+	{ "Italian", 0x0b } ,
+	{ "French", 0x0c } ,
+	{ "Czech/Slovak", 0x0e } ,
+
+	{ "English", 0x10 } ,
+	{ "German", 0x11 } ,
+	{ "Swedish/Finnish/Hungarian", 0x12 } ,
+	{ "Italian", 0x13 } ,
+	{ "French", 0x14 } ,
+	{ "Portuguese/Spanish", 0x15 } ,
+	{ "Turkish", 0x16 } ,
+
+	{ "Serbian/Croatian/Slovenian", 0x1d } ,
+	{ "Rumanian", 0x1f } ,
+
+	{ "Serbian/Croatian", 0x20 } ,
+	{ "German", 0x21 } ,
+	{ "Estonian", 0x22 } ,
+	{ "Lettish/Lithuanian", 0x23 } ,
+	{ "Russian/Bulgarian", 0x24 } ,
+	{ "Ukrainian", 0x25 } ,
+	{ "Czech/Slovak", 0x26 } ,
+
+	{ "Turkish", 0x36 } ,
+	{ "Greek", 0x37 } ,
+
+	{ "English", 0x40 } ,
+	{ "French", 0x44 } ,
+	{ "Arabic", 0x47 } ,
+
+	{ "Hebrew", 0x55 } ,
+	{ "Arabic", 0x57 } ,
+};
+
+#endif

palettedockwidget.cpp

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QColorDialog>
+#include <QDialog>
+#include <QGridLayout>
+#include <QLabel>
+#include <QPushButton>
+#include <QUndoCommand>
+#include <math.h>
+
+#include "palettedockwidget.h"
+
+#include "document.h"
+#include "mainwidget.h"
+
+PaletteDockWidget::PaletteDockWidget(TeletextWidget *parent): QDockWidget(parent)
+{
+	QGridLayout *paletteGridLayout = new QGridLayout;
+	QWidget *paletteGridWidget = new QWidget;
+
+	m_parentMainWidget = parent;
+
+	this->setObjectName("PaletteDockWidget");
+	this->setWindowTitle("Palette");
+	for (int r=0, i=0; r<=3; r++) {
+		paletteGridLayout->addWidget(new QLabel(tr("CLUT %1").arg(r)), r, 0);
+		m_resetButton[r] = new QPushButton(tr("Reset"));
+		paletteGridLayout->addWidget(m_resetButton[r], r, 9);
+		connect(m_resetButton[r], &QAbstractButton::clicked, [=]() { resetCLUT(r); });
+		for (int c=0; c<=7; c++, i++) {
+			if (i == 8)
+				continue;
+			m_colourButton[i] = new QPushButton();
+			m_colourButton[i]->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
+			paletteGridLayout->addWidget(m_colourButton[i], r, c+1);
+			connect(m_colourButton[i], &QAbstractButton::clicked, [=]() { selectColour(i); });
+		}
+	}
+	paletteGridWidget->setLayout(paletteGridLayout);
+	this->setWidget(paletteGridWidget);
+	connect(m_parentMainWidget->document(), &TeletextDocument::colourChanged, this, &PaletteDockWidget::updateColourButton);
+}
+
+void PaletteDockWidget::updateColourButton(int colourIndex)
+{
+	if (colourIndex == 8)
+		return;
+	QString colourString = QString("%1").arg(m_parentMainWidget->document()->currentSubPage()->CLUT(colourIndex), 3, 16, QChar('0'));
+	m_colourButton[colourIndex]->setText(colourString);
+
+	// Set text itself to black or white so it can be seen over background colour - http://alienryderflex.com/hsp.html
+	int r = m_parentMainWidget->document()->currentSubPage()->CLUT(colourIndex) >> 8;
+	int g = (m_parentMainWidget->document()->currentSubPage()->CLUT(colourIndex) >> 4) & 0xf;
+	int b = m_parentMainWidget->document()->currentSubPage()->CLUT(colourIndex) & 0xf;
+	char blackOrWhite = (sqrt(r*r*0.299 + g*g*0.587 + b*b*0.114) > 7.647) ? '0' : 'f';
+
+	QString qss = QString("background-color: #%1; color: #%2%2%2; border: none").arg(colourString).arg(blackOrWhite);
+	m_colourButton[colourIndex]->setStyleSheet(qss);
+
+	if (m_parentMainWidget->document()->currentSubPage()->CLUT(colourIndex) == m_parentMainWidget->document()->currentSubPage()->CLUT(colourIndex, 0)) {
+		// Default colour was set, disable Reset button if all colours in row are default as well
+		for (int i=colourIndex & 0x18; i<(colourIndex & 0x18)+8; i++) {
+			if (i == 8)
+				continue;
+			if (m_parentMainWidget->document()->currentSubPage()->CLUT(i) != m_parentMainWidget->document()->currentSubPage()->CLUT(i, 0)) {
+				m_resetButton[colourIndex>>3]->setEnabled(true);
+				return;
+			}
+		}
+		m_resetButton[colourIndex>>3]->setEnabled(false);
+	} else
+		m_resetButton[colourIndex>>3]->setEnabled(true);
+}
+
+void PaletteDockWidget::updateAllColourButtons()
+{
+	for (int i=0; i<32; i++)
+		updateColourButton(i);
+}
+
+void PaletteDockWidget::showEvent(QShowEvent *event)
+{
+	Q_UNUSED(event);
+	updateAllColourButtons();
+}
+
+void PaletteDockWidget::selectColour(int colourIndex)
+{
+    const QColor newColour = QColorDialog::getColor(CLUTtoQColor(m_parentMainWidget->document()->currentSubPage()->CLUT(colourIndex)), this, "Select Colour");
+
+	if (newColour.isValid()) {
+		QUndoCommand *setColourCommand = new SetColourCommand(m_parentMainWidget->document(), colourIndex, ((newColour.red() & 0xf0) << 4) | (newColour.green() & 0xf0) | ((newColour.blue() & 0xf0) >> 4));
+		m_parentMainWidget->document()->undoStack()->push(setColourCommand);
+	}
+}
+
+void PaletteDockWidget::resetCLUT(int colourTable)
+{
+	QUndoCommand *resetCLUTCommand = new ResetCLUTCommand(m_parentMainWidget->document(), colourTable);
+	m_parentMainWidget->document()->undoStack()->push(resetCLUTCommand);
+}

palettedockwidget.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef PALETTEDOCKWIDGET_H
+#define PALETTEDOCKWIDGET_H
+
+#include <QDockWidget>
+#include <QPushButton>
+
+#include "mainwidget.h"
+
+class PaletteDockWidget : public QDockWidget
+{
+	Q_OBJECT
+
+public:
+	PaletteDockWidget(TeletextWidget *parent);
+	void updateAllColourButtons();
+
+public slots:
+	void updateColourButton(int);
+
+protected:
+	void showEvent(QShowEvent *);
+
+private slots:
+	void selectColour(int);
+
+private:
+	void resetCLUT(int);
+
+	QPushButton *m_colourButton[32], *m_resetButton[4];
+
+	TeletextWidget *m_parentMainWidget;
+};
+
+#endif

qteletextmaker.pro

@@ -0,0 +1,31 @@
+QT += widgets
+requires(qtConfig(filedialog))
+
+HEADERS       = document.h \
+                mainwidget.h \
+                mainwindow.h \
+                page.h \
+                pageoptionsdockwidget.h \
+                palettedockwidget.h \
+                render.h \
+                x26dockwidget.h \
+                x26model.h \
+                x26triplets.h \
+                x28dockwidget.h
+SOURCES       = document.cpp \
+                main.cpp \
+                mainwidget.cpp \
+                mainwindow.cpp \
+                pageoptionsdockwidget.cpp \
+                palettedockwidget.cpp \
+                page.cpp \
+                render.cpp \
+                x26dockwidget.cpp \
+                x26model.cpp \
+                x26triplets.cpp \
+                x28dockwidget.cpp
+RESOURCES     = qteletextmaker.qrc
+
+# install
+target.path = /usr/local/bin
+INSTALLS += target

qteletextmaker.qrc

@@ -0,0 +1,11 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+	<file>images/teletextfont.png</file>
+	<file>images/copy.png</file>
+	<file>images/cut.png</file>
+	<file>images/new.png</file>
+	<file>images/open.png</file>
+	<file>images/paste.png</file>
+	<file>images/save.png</file>
+</qresource>
+</RCC>

render.h

@@ -0,0 +1,246 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef RENDER_H
+#define RENDER_H
+
+#include <QBitmap>
+#include <QMap>
+#include <QMultiMap>
+#include <vector>
+
+#include "page.h"
+
+
+struct textCharacter {
+	unsigned char code=0x20;
+	int set=0;
+	int diacritical=0;
+};
+
+struct displayAttributes {
+	bool doubleHeight=false;
+	bool doubleWidth=false;
+	bool boxingWindow=false;
+	bool conceal=false;
+	bool invert=false;
+	bool underlineSeparated=false;
+	bool forceContiguous=false;
+};
+
+struct textAttributes {
+	int foreColour=0x07;
+	int backColour=0x00;
+	struct flashFunctions {
+		int mode=0;
+		int ratePhase=0;
+		int phaseNumber=0;
+	} flash;
+	displayAttributes display;
+	/* font style */
+};
+
+struct textCell {
+	textCharacter character;
+	textAttributes attribute;
+	bool bottomHalf=false;
+	bool rightHalf=false;
+	bool level1Mosaic=false;
+	int level1CharSet=0;
+};
+
+struct applyAttributes {
+	bool applyForeColour=false;
+	bool applyBackColour=false;
+	bool applyFlash=false;
+	bool applyDisplayAttributes=false;
+	bool applyTextSizeOnly=false;
+	bool applyBoxingOnly=false;
+	bool applyConcealOnly=false;
+	bool applyContiguousOnly=false;
+	bool copyAboveAttributes=false;
+	textAttributes attribute;
+};
+
+class ActivePosition
+{
+public:
+	ActivePosition();
+	int row() const { return (m_row == -1) ? 0 : m_row; }
+	int column() const { return (m_column == -1) ? 0 : m_column; }
+	bool isDeployed() const { return m_row != -1; }
+	bool setRow(int);
+	bool setColumn(int);
+//	bool setRowAndColumn(int, int);
+
+private:
+	int m_row, m_column;
+};
+
+
+class TextLayer
+{
+public:
+//	TextLayer(TeletextPage* thePage) : currentPage(thePage) { };
+	virtual ~TextLayer() = default;
+	void setTeletextPage(TeletextPage*);
+	virtual textCharacter character(int, int) =0;
+	virtual void attributes(int, int, applyAttributes *) =0;
+	virtual int fullScreenColour() const =0;
+	virtual int fullRowColour(int) const =0;
+	virtual bool fullRowDownwards(int) const =0;
+	virtual int objectType() const =0;
+	void setFullScreenColour(int);
+	void setFullRowColour(int, int, bool);
+
+	// TODO replace ints with proper classes
+	QMultiMap<int, int> enhanceMap;
+
+protected:
+	TeletextPage* m_teletextPage;
+	int m_layerFullScreenColour=-1;
+	int m_layerFullRowColour[25];
+	bool m_layerFullRowDownwards[25];
+	applyAttributes m_applyAttributes;
+};
+
+class EnhanceLayer: public TextLayer
+{
+public:
+	EnhanceLayer();
+	textCharacter character(int, int);
+	void attributes(int, int, applyAttributes *);
+	int fullScreenColour() const { return m_layerFullScreenColour; };
+	int fullRowColour(int r) const { return m_layerFullRowColour[r]; };
+	bool fullRowDownwards(int r) const { return m_layerFullRowDownwards[r]; };
+	int objectType() const { return m_objectType; };
+	void setObjectType(int);
+	void setOrigin(int, int);
+
+protected:
+	int m_objectType=0;
+	int m_originR=0;
+	int m_originC=0;
+	int m_rowCached=-1;
+	int m_rightMostColumn[25];
+};
+
+class Level1Layer: public TextLayer
+{
+public:
+//	Level1Layer(TeletextPage *thePage) : TextLayer(thePage) { };
+	Level1Layer();
+	textCharacter character(int, int);
+	void attributes(int, int, applyAttributes *);
+	int fullScreenColour() const { return -1; };
+	int fullRowColour(int) const { return -1; };
+	bool fullRowDownwards(int) const { return false; };
+	int objectType() const { return 0; }
+	bool isRowBottomHalf(int r) const { return m_rowHeight[r]==RHbottomhalf; }
+
+private:
+	void updateRowCache(int);
+
+	struct level1CacheAttributes {
+		int foreColour=0x07;
+		int backColour=0x00;
+		unsigned char sizeCode=0x0c;
+		bool mosaics=false;
+		bool separated=false;
+		bool held=false;
+		bool escSwitch=false;
+		unsigned char holdChar=0x20;
+		bool holdSeparated=false;
+	};
+	level1CacheAttributes m_attributeCache[40];
+	int m_rowCached=-1;
+	bool m_rowHasDoubleHeightAttr[25];
+	enum rowHeightEnum { RHnormal=-1, RHtophalf, RHbottomhalf } m_rowHeight[25];
+};
+
+class TeletextPageRender : public QObject
+{
+	Q_OBJECT
+
+public:
+	TeletextPageRender();
+	~TeletextPageRender();
+	void decodePage();
+	void renderPage();
+	void renderPage(int r);
+	void setTeletextPage(TeletextPage*);
+	void updateSidePanels();
+	void buildEnhanceMap(TextLayer *, int=0);
+	QPixmap* pagePixmap(int i) const { return m_pagePixmap[i]; };
+	bool level1MosaicAttribute(int r, int c) const { return m_cell[r][c].level1Mosaic; };
+	int level1CharSet(int r, int c) const { return m_cell[r][c].level1CharSet; };
+	int leftSidePanelColumns() const { return m_leftSidePanelColumns; };
+	int rightSidePanelColumns() const { return m_rightSidePanelColumns; };
+	void setGrid(bool);
+
+public slots:
+	void setReveal(bool);
+	void setMix(bool);
+	void setShowCodes(bool);
+	void setRenderLevel(int);
+
+signals:
+	void fullScreenColourChanged(QColor);
+	void fullRowColourChanged(int, QColor);
+	void flashChanged(int);
+	void sidePanelsChanged();
+
+protected:
+	void updateFlashRequired(int);
+	inline void setFullScreenColour(int);
+	inline void setFullRowColour(int, int);
+
+	QBitmap* m_fontBitmap;
+	QPixmap* m_pagePixmap[6];
+	int m_finalFullScreenColour, m_renderLevel;
+	QColor m_finalFullScreenQColor;
+	int m_leftSidePanelColumns, m_rightSidePanelColumns;
+	bool m_reveal, m_mix, m_grid, m_showCodes;
+	Level1Layer m_level1Layer;
+	std::vector<TextLayer *> m_textLayer;
+	const int m_foregroundRemap[8] = { 0,  0,  0,  8,  8, 16, 16, 16 };
+	const int m_backgroundRemap[8] = { 0,  8, 16,  8, 16,  8, 16, 24 };
+
+private:
+	textCell m_cell[25][72];
+	TeletextPage* m_teletextPage;
+	int m_flashRequired;
+	int m_fullRowColour[25];
+	QColor m_fullRowQColor[25];
+	int m_flashRow[25];
+	bool m_concealRow[25];
+};
+
+static const QMap<int, int> g0CharacterMap {
+	{ 0x00, 12 }, { 0x01, 15 }, { 0x02, 22 }, { 0x03, 16 }, { 0x04, 14 }, { 0x05, 19 }, { 0x06, 11 },
+	{ 0x08, 18 }, { 0x09, 15 }, { 0x0a, 22 }, { 0x0b, 16 }, { 0x0c, 14 }, { 0x0e, 11 },
+	{ 0x10, 12 }, { 0x11, 15 }, { 0x12, 22 }, { 0x13, 16 }, { 0x14, 14 }, { 0x15, 19 }, { 0x16, 23 },
+	{ 0x1d, 21 }, { 0x1f, 20 },
+	{ 0x20,  1 }, { 0x21, 15 }, { 0x22, 13 }, { 0x23, 17 }, { 0x24,  2 }, { 0x25,  3 }, { 0x26, 11 },
+	{ 0x36, 23 }, { 0x37,  4 },
+	{ 0x40, 12 }, { 0x44, 14 }, { 0x47,  5 },
+	{ 0x55,  6 }, { 0x57,  5 }
+};
+
+#endif

x26dockwidget.cpp

@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QActionGroup>
+#include <QButtonGroup>
+#include <QCheckBox>
+#include <QComboBox>
+#include <QGroupBox>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QMenu>
+#include <QPushButton>
+#include <QRadioButton>
+#include <QShortcut>
+#include <QSpinBox>
+#include <QStandardItemModel>
+#include <QToolButton>
+#include <QVBoxLayout>
+
+#include "x26dockwidget.h"
+
+X26DockWidget::X26DockWidget(TeletextWidget *parent): QDockWidget(parent)
+{
+	QVBoxLayout *x26Layout = new QVBoxLayout;
+	QWidget *x26Widget = new QWidget;
+	m_parentMainWidget = parent;
+
+	this->setObjectName("x26DockWidget");
+	this->setWindowTitle("X/26 triplets");
+
+	// Table listing of local enhancements
+	m_x26View = new QTableView;
+	m_x26Model = new X26Model(m_parentMainWidget);
+	m_x26View->setModel(m_x26Model);
+	m_x26View->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
+	m_x26View->setSelectionBehavior(QAbstractItemView::SelectRows);
+	m_x26View->setColumnWidth(0, 50);
+	m_x26View->setColumnWidth(1, 50);
+	m_x26View->setColumnWidth(2, 200);
+	m_x26View->setColumnWidth(3, 200);
+	x26Layout->addWidget(m_x26View);
+
+	// "Temporary" widgets to edit raw triplet values
+	QHBoxLayout *rawTripletLayout = new QHBoxLayout;
+
+	rawTripletLayout->addWidget(new QLabel(tr("Address")));
+	m_rawTripletAddressSpinBox = new QSpinBox;
+	m_rawTripletAddressSpinBox->setMaximum(63);
+	rawTripletLayout->addWidget(m_rawTripletAddressSpinBox);
+
+	rawTripletLayout->addWidget(new QLabel(tr("Mode")));
+	m_rawTripletModeSpinBox = new QSpinBox;
+	m_rawTripletModeSpinBox->setMaximum(31);
+	rawTripletLayout->addWidget(m_rawTripletModeSpinBox);
+
+	rawTripletLayout->addWidget(new QLabel(tr("Data")));
+	m_rawTripletDataSpinBox = new QSpinBox;
+	m_rawTripletDataSpinBox->setMaximum(127);
+	rawTripletLayout->addWidget(m_rawTripletDataSpinBox);
+
+	connect(m_rawTripletAddressSpinBox, QOverload<int>::of(&QSpinBox::valueChanged), this, &X26DockWidget::rawTripletAddressSpinBoxChanged);
+	connect(m_rawTripletModeSpinBox, QOverload<int>::of(&QSpinBox::valueChanged), this, &X26DockWidget::rawTripletModeSpinBoxChanged);
+	connect(m_rawTripletDataSpinBox, QOverload<int>::of(&QSpinBox::valueChanged), this, &X26DockWidget::rawTripletDataSpinBoxChanged);
+
+	x26Layout->addLayout(rawTripletLayout);
+
+	// Insert and delete widgets
+	QHBoxLayout *insertDeleteLayout = new QHBoxLayout;
+
+	m_insertPushButton = new QPushButton(tr("Insert triplet"));
+	insertDeleteLayout->addWidget(m_insertPushButton);
+	m_deletePushButton = new QPushButton(tr("Delete triplet"));
+	insertDeleteLayout->addWidget(m_deletePushButton);
+
+	connect(m_insertPushButton, &QPushButton::clicked, this, &X26DockWidget::insertTriplet);
+	connect(m_deletePushButton, &QPushButton::clicked, this, &X26DockWidget::deleteTriplet);
+
+	x26Layout->addLayout(insertDeleteLayout);
+
+	x26Widget->setLayout(x26Layout);
+	this->setWidget(x26Widget);
+
+	m_x26View->setContextMenuPolicy(Qt::CustomContextMenu);
+	connect(m_x26View, &QWidget::customContextMenuRequested, this, &X26DockWidget::customMenuRequested);
+
+	connect(m_x26View, &QAbstractItemView::clicked, this, &X26DockWidget::rowClicked);
+
+	QShortcut* insertShortcut = new QShortcut(QKeySequence(Qt::Key_Insert), m_x26View);
+	connect(insertShortcut, &QShortcut::activated, this, &X26DockWidget::insertTriplet);
+	QShortcut* deleteShortcut = new QShortcut(QKeySequence(Qt::Key_Delete), m_x26View);
+	connect(deleteShortcut, &QShortcut::activated, this, &X26DockWidget::deleteTriplet);
+}
+
+void X26DockWidget::loadX26List()
+{
+	m_x26Model->setX26ListLoaded(true);
+}
+
+void X26DockWidget::unloadX26List()
+{
+	m_x26Model->setX26ListLoaded(false);
+	m_rawTripletAddressSpinBox->setEnabled(false);
+	m_rawTripletDataSpinBox->setEnabled(false);
+	m_rawTripletModeSpinBox->setEnabled(false);
+}
+
+void X26DockWidget::rowClicked(const QModelIndex &index)
+{
+	updateRawTripletWidgets(index);
+}
+
+void X26DockWidget::updateRawTripletWidgets(const QModelIndex &index)
+{
+	m_rawTripletAddressSpinBox->setEnabled(true);
+	m_rawTripletDataSpinBox->setEnabled(true);
+	m_rawTripletModeSpinBox->setEnabled(true);
+	m_rawTripletAddressSpinBox->blockSignals(true);
+	m_rawTripletModeSpinBox->blockSignals(true);
+	m_rawTripletDataSpinBox->blockSignals(true);
+	m_rawTripletAddressSpinBox->setValue(index.model()->data(index.model()->index(index.row(), 0), Qt::UserRole).toInt());
+	m_rawTripletModeSpinBox->setValue(index.model()->data(index.model()->index(index.row(), 1), Qt::UserRole).toInt());
+	m_rawTripletDataSpinBox->setValue(index.model()->data(index.model()->index(index.row(), 2), Qt::UserRole).toInt());
+	m_rawTripletAddressSpinBox->blockSignals(false);
+	m_rawTripletModeSpinBox->blockSignals(false);
+	m_rawTripletDataSpinBox->blockSignals(false);
+}
+void X26DockWidget::rawTripletAddressSpinBoxChanged(int newValue)
+{
+	m_x26Model->setData(m_x26Model->index(m_x26View->currentIndex().row(), 0), newValue, Qt::UserRole);
+}
+
+void X26DockWidget::rawTripletModeSpinBoxChanged(int newValue)
+{
+	m_x26Model->setData(m_x26Model->index(m_x26View->currentIndex().row(), 1), newValue, Qt::UserRole);
+}
+
+void X26DockWidget::rawTripletDataSpinBoxChanged(int newValue)
+{
+	m_x26Model->setData(m_x26Model->index(m_x26View->currentIndex().row(), 2), newValue, Qt::UserRole);
+}
+
+void X26DockWidget::tripletDataChanged(int newValue, int bitMask, int bitShift)
+{
+	m_x26Model->setData(m_x26Model->index(m_x26View->currentIndex().row(), 2), (m_x26Model->data(m_x26Model->index(m_x26View->currentIndex().row(), 2), Qt::UserRole).toInt() & bitMask) | (newValue << bitShift), Qt::UserRole);
+	updateRawTripletWidgets(m_x26View->currentIndex());
+}
+void X26DockWidget::insertTriplet()
+{
+	QModelIndex index = m_x26View->currentIndex();
+
+	if (index.isValid())
+		m_x26Model->insertRow(index.row(), QModelIndex());
+	else
+		m_x26Model->insertFirstRow();
+}
+
+void X26DockWidget::deleteTriplet()
+{
+	QModelIndex index = m_x26View->currentIndex();
+	if (index.isValid())
+		m_x26Model->removeRow(index.row(), index.parent());
+}
+
+void X26DockWidget::customMenuRequested(QPoint pos)
+{
+	QModelIndex index = m_x26View->indexAt(pos);
+
+	QMenu *menu = new QMenu(this);
+
+	QAction *insertAct = new QAction("Insert triplet", this);
+	menu->addAction(insertAct);
+	connect(insertAct, &QAction::triggered, this, &X26DockWidget::insertTriplet);
+	if (index.isValid()) {
+		QAction *deleteAct = new QAction("Delete triplet", this);
+		menu->addAction(deleteAct);
+		connect(deleteAct, &QAction::triggered, this, &X26DockWidget::deleteTriplet);
+	}
+	menu->popup(m_x26View->viewport()->mapToGlobal(pos));
+}

x26dockwidget.h

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef X26DOCKWIDGET_H
+#define X26DOCKWIDGET_H
+
+#include <QCheckBox>
+#include <QComboBox>
+#include <QDockWidget>
+#include <QGroupBox>
+#include <QPushButton>
+#include <QRadioButton>
+#include <QSpinBox>
+#include <QTableView>
+
+#include "mainwidget.h"
+#include "x26model.h"
+
+class X26DockWidget : public QDockWidget
+{
+	Q_OBJECT
+
+public:
+	X26DockWidget(TeletextWidget *parent);
+
+public slots:
+	void insertTriplet();
+	void deleteTriplet();
+	void customMenuRequested(QPoint pos);
+	void loadX26List();
+	void unloadX26List();
+	void rowClicked(const QModelIndex &);
+	void updateRawTripletWidgets(const QModelIndex &);
+	void rawTripletAddressSpinBoxChanged(int);
+	void rawTripletModeSpinBoxChanged(int);
+	void rawTripletDataSpinBoxChanged(int);
+	void tripletDataChanged(int, int=0, int=0);
+
+private:
+	QTableView *m_x26View;
+	X26Model *m_x26Model;
+	// "Temporary" widgets to edit raw triplet values
+	QSpinBox *m_rawTripletAddressSpinBox, *m_rawTripletModeSpinBox, *m_rawTripletDataSpinBox;
+	QPushButton *m_insertPushButton, *m_deletePushButton;
+
+	TeletextWidget *m_parentMainWidget;
+};
+
+#endif

x26model.cpp

@@ -0,0 +1,614 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QList>
+
+#include "x26model.h"
+
+X26Model::X26Model(TeletextWidget *parent): QAbstractListModel(parent)
+{
+	m_parentMainWidget = parent;
+	m_listLoaded = true;
+}
+
+void X26Model::setX26ListLoaded(bool newListLoaded)
+{
+	beginResetModel();
+	m_listLoaded = newListLoaded;
+	endResetModel();
+}
+
+int X26Model::rowCount(const QModelIndex & /*parent*/) const
+{
+	return m_listLoaded ? m_parentMainWidget->document()->currentSubPage()->localEnhance.size() : 0;
+}
+
+int X26Model::columnCount(const QModelIndex & /*parent*/) const
+{
+	return 4;
+}
+
+QVariant X26Model::data(const QModelIndex &index, int role) const
+{
+	int mode = m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).mode();
+
+	// Qt::UserRole will always return the raw values
+	if (role == Qt::UserRole)
+		switch (index.column()) {
+			case 0:
+				return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address();
+			case 1:
+				return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).mode();
+			case 2:
+				return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data();
+			default:
+				return QVariant();
+		}
+
+	if (role == Qt::DisplayRole || role == Qt::EditRole)
+		switch (index.column()) {
+			case 0:
+				// Show row number only if address part of triplet actually represents a row
+				// i.e. Full row colour, Set Active Position and Origin Modifier
+				if (!m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					return "";
+				// For Origin Modifier address of 40 refers to same row, so show it as 0
+				if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).mode() == 0x10) {
+					if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() == 40)
+						return 0;
+					else
+						return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).addressRow();
+				}
+				if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).mode() == 0x01 || m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).mode() == 0x04)
+					return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).addressRow();
+				else
+					return "";
+			case 1:
+				if (!m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).addressColumn();
+				// For Set Active Position and Origin Modifier, data is the column
+				else if (mode == 0x04 || mode == 0x10)
+					return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data();
+				else
+					return "";
+		}
+
+	QString result;
+
+	if (role == Qt::DisplayRole)
+		switch (index.column()) {
+			case 2:
+				if (!m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					mode |= 0x20;
+				return (modeTripletName[mode]);
+			case 3:
+				if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					// Row address group
+					switch (mode) {
+						case 0x01: // Full row colour
+						case 0x07: // Address row 0
+							if ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x60) == 0x60)
+								result = ", down to bottom";
+							else if ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x60) == 0x00)
+								result = ", this row only";
+							// fall-through
+						case 0x00: // Full screen colour
+							if (!(result.isEmpty()) || (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x60) == 0x00) {
+								result.prepend(QString("CLUT %1:%2").arg((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x18) >> 3).arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x07));
+								return result;
+							}
+							break;
+						case 0x04: // Set Active Position
+						case 0x10: // Origin Modifier
+							// For Set Active Position and Origin Modifier, data is the column, so return blank
+							return "";
+						case 0x11 ... 0x13: // Invoke object
+							switch (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x18) {
+								case 0x08:
+									return QString("Local: d%1 t%2").arg((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() >> 4) | ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x01) << 3)).arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x0f);
+								case 0x10:
+									result = "POP";
+									break;
+								case 0x18:
+									result = "GPOP";
+									break;
+								// case 0x00: won't happen since that would make a column triplet, not a row triplet
+							}
+							result.append(QString(": subpage %1 pkt %2 trplt %3 bits ").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x0f).arg((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x03) + 1).arg(((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x60) >> 5) * 3 + (mode & 0x03)));
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x10)
+								result.append("10-18");
+							else
+								result.append("1-9");
+							return result;
+						case 0x15 ... 0x17: // Define object
+							result = (QString("Local: d%1 t%2, ").arg((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() >> 4) | ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 1) << 3)).arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x0f));
+							switch (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x18) {
+								case 0x08:
+									result.append("L2.5 only");
+									break;
+								case 0x10:
+									result.append("L3.5 only");
+									break;
+								case 0x18:
+									result.append("L2.5 and 3.5");
+									break;
+								// case 0x00: won't happen since that would make a column triplet, not a row triplet
+							}
+							return result;
+						case 0x18: // DRCS mode
+							result = (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x40) == 0x40 ? "Normal" : "Global";
+							result.append(QString(": subpage %1, ").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x0f));
+							switch (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x30) {
+								case 0x10:
+									result.append("L2.5 only");
+									break;
+								case 0x20:
+									result.append("L3.5 only");
+									break;
+								case 0x30:
+									result.append("L2.5 and 3.5");
+									break;
+								//case 0x00:
+								//	result = "Reserved";
+								//	break;
+							}
+							return result;
+						case 0x1f: // Termination
+							switch (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x07) {
+								case 0x00:
+									return "Intermed (G)POP subpage. End of object, more follows";
+									break;
+								case 0x01:
+									return "Intermed (G)POP subpage. End of last object on page";
+									break;
+								case 0x02:
+									return "Last (G)POP subpage. End of object, more follows";
+									break;
+								case 0x03:
+									return "Last (G)POP subpage. End of last object on page";
+									break;
+								case 0x04:
+									return "Local object definitions. End of object, more follows";
+									break;
+								case 0x05:
+									return "Local object definitions. End of last object on page";
+									break;
+								case 0x06:
+									return "End of local enhance data. Local objects follow";
+									break;
+								case 0x07:
+									return "End of local enhance data. No local objects";
+									break;
+							}
+							break;
+						case 0x08 ... 0x0d: // PDC
+							return QString("0x%1").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data(), 2, 16, QChar('0'));
+					}
+				else
+					// Column address group
+					switch (mode) {
+						case 0x00: // Foreground colour
+						case 0x03: // Background colour
+							if (!(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x60))
+								return QString("CLUT %1:%2").arg((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x18) >> 3).arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x07);
+							break;
+						case 0x01: // G1 mosaic character
+						case 0x02: // G3 mosaic character at level 1.5
+						case 0x09: // G0 character
+						case 0x0b: // G3 mosaic character at level >=2.5
+						case 0x0f ... 0x1f: // G2 character or G0 diacrtitical mark
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() >= 0x20)
+								return QString("0x%1").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data(), 2, 16);
+							break;
+						case 0x07: // Flash functions
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() < 0x18) {
+								switch (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x03) {
+									case 0x00:
+										result = "Steady";
+										break;
+									case 0x01:
+										result = "Normal";
+										break;
+									case 0x02:
+										result = "Invert";
+										break;
+									case 0x03:
+										result = "Adj CLUT";
+										break;
+								}
+								switch (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x1c) {
+									case 0x00:
+										result.append(", 1Hz");
+										break;
+									case 0x04:
+										result.append(", 2Hz ph 1");
+										break;
+									case 0x08:
+										result.append(", 2Hz ph 2");
+										break;
+									case 0x0c:
+										result.append(", 2Hz ph 3");
+										break;
+									case 0x10:
+										result.append(", 2Hz inc");
+										break;
+									case 0x14:
+										result.append(", 2Hz dec");
+										break;
+								}
+								return result;
+							}
+							break;
+						//TODO case 0x08: // G0 and G2 designation
+						case 0x0c: // Display attributes
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x02)
+								result.append("Boxing ");
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x04)
+								result.append("Conceal ");
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x10)
+								result.append("Invert ");
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x20)
+								result.append("Underline ");
+							if (result.isEmpty())
+								result = "None";
+							else
+								// Chop off the last space
+								result.chop(1);
+							switch (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x41) {
+								case 0x00:
+									result.append(", normal size");
+									break;
+								case 0x01:
+									result.append(", double height");
+									break;
+								case 0x40:
+									result.append(", double width");
+									break;
+								case 0x41:
+									result.append(", double size");
+									break;
+							}
+							return result;
+						case 0x0d: // DRCS character
+							result = (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x40) == 0x40 ? "Normal" : "Global";
+							result.append(QString(": %1").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x3f));
+							return result;
+						case 0x0e: // Font style
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x01)
+								result.append("Proportional ");
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x02)
+								result.append("Bold ");
+							if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x04)
+								result.append("Italic ");
+							if (result.isEmpty())
+								result = "None";
+							else
+								// Chop off the last space
+								result.chop(1);
+							result.append(QString(", %1 row(s)").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() >> 4));
+							return result;
+						case 0x06: // PDC
+							return QString("0x%1").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data(), 2, 16, QChar('0'));
+						default: // Reserved
+							return QString("Reserved 0x%1").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data(), 2, 16, QChar('0'));
+					}
+				// Reserved mode or data
+				return QString("Reserved 0x%1").arg(m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data(), 2, 16, QChar('0'));
+		}
+
+	if (role == Qt::EditRole)
+		switch (index.column()) {
+			case 2:
+				if (!m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					mode |= 0x20;
+				return mode;
+			case 3:
+				if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					// Row address group
+					switch (mode) {
+						case 0x00: // Full screen colour
+						case 0x01: // Full row colour
+						case 0x07: // Address row 0
+							// Colour index
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x1f;
+						case 0x11 ... 0x13: // Invoke object
+							// Local, POP or GPOP
+							return ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x18) >> 3) - 1;
+						case 0x15 ... 0x17: // Define object
+							// Required at level 2.5 and/or 3.5
+							return ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x18) >> 3) - 1;
+						case 0x1f: // Termination
+							// Intermed POP subpage|Last POP subpage|Local Object|Local enhance
+							return ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x06) >> 1);
+						default:
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data();
+					}
+				else
+					// Column address group
+					switch (mode) {
+						case 0x00: // Foreground colour
+						case 0x03: // Background colour
+							// Colour index
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x1f;
+						case 0x07: // Flash functions
+							// Flash mode
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x03;
+						case 0x0c: // Display attributes
+							// underline/separated, invert, conceal, boxing/window
+							return ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x06) >> 1) | ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x30) >> 2);
+						case 0x0e: // Font style
+							// Proportional, Bold, Italics
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x07;
+						default:
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data();
+					}
+			case 4:
+				if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					// Row address group
+					switch (mode) {
+						case 0x01: // Full row colour
+						case 0x07: // Address row 0
+							// "this row only" or "down to bottom"
+							return ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x60) == 0x60) ? 1 : 0;
+						case 0x11 ... 0x13: // Invoke object
+							// Object source
+							//TODO POP and GPOP, if ((x26Triplet.address() & 0x08) == 0x08)
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() | ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 1) << 7);
+						case 0x1f: // Termination
+							// More follows/Last
+							// return entire value as dropdown text changes depending on setting
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x07;
+					}
+				else
+					// Column address group
+					switch (mode) {
+						case 0x07: // Flash functions
+							// Flash rate and phase
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() >> 2;
+						case 0x0c: // Display attributes
+							// Text size
+							return (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x01) | ((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x40) >> 5);
+						case 0x0e: // Font style
+							// Number of rows
+							return m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() >> 4;
+					}
+		}
+
+	return QVariant();
+}
+
+bool X26Model::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+	if (!index.isValid())
+		return false;
+
+	int mode = m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).mode();
+
+	if (role == Qt::UserRole && value.canConvert<int>() && index.column() <= 2) {
+		int intValue = value.toInt();
+		switch (index.column()) {
+			case 0:
+				m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setAddress(intValue);
+				break;
+			case 1:
+				m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setMode(intValue);
+				break;
+			case 2:
+				m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData(intValue);
+				break;
+		}
+		emit dataChanged(createIndex(index.row(), 0), createIndex(index.row(), 4), {role});
+		m_parentMainWidget->refreshPage();
+		return true;
+	}
+	if (role == Qt::EditRole && value.canConvert<int>()) {
+		int intValue = value.toInt();
+		if (intValue < 0)
+			return false;
+		switch (index.column()) {
+			case 0:
+				if (intValue > 24)
+					return false;
+				m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setAddressRow(intValue);
+				break;
+			case 1:
+				if (intValue > 39)
+					return false;
+				// For Set Active Position and Origin Modifier, data is the column
+				if (mode == 0x04 || mode == 0x10)
+					m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData(intValue);
+				else
+					m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setAddressColumn(intValue);
+				break;
+			case 2:
+				if (intValue < 0x20 && !m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet()) {
+					// Changing mode from column triplet to row triplet
+					m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setAddressRow(1);
+					m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData(0);
+				}
+				if (intValue >= 0x20 && m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet()) {
+					// Changing mode from row triplet to column triplet
+					m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setAddressColumn(0);
+					m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData(0);
+				}
+				m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setMode(intValue & 0x1f);
+				break;
+			case 3:
+				if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					// Row address group
+					switch (mode) {
+						case 0x00: // Full screen colour
+						case 0x01: // Full row colour
+						case 0x07: // Address row 0
+							// Colour index
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x60) | intValue);
+							break;
+						case 0x04: // Set Active Position
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData(intValue);
+							break;
+						case 0x11 ... 0x13: // Invoke object
+							// Local, POP or GPOP
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setAddress((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x67) | ((intValue+1) << 3));
+							break;
+						case 0x15 ... 0x17: // Define object
+							// required at level 2.5 and/or 3.5
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setAddress((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x67) | ((intValue+1) << 3));
+							break;
+						case 0x1f: // Termination
+							// Intermed POP subpage|Last POP subpage|Local Object|Local enhance
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x01) | (intValue << 1));
+							break;
+					}
+				else
+					// Column address group
+					switch (mode) {
+						case 0x07: // Flash functions
+							// Flash mode
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x1c) | intValue);
+							break;
+						case 0x0c: // Display attributes
+							// underline/separated, invert, conceal, boxing/window
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x41) | ((intValue & 0x0c) << 2) | ((intValue & 0x03) << 1));
+							break;
+						case 0x0e: // Font style
+							// Proportional, Bold, Italics
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x70) | intValue);
+							break;
+						default:
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData(intValue);
+					}
+				break;
+			case 4:
+				if (m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).isRowTriplet())
+					// Row address group
+					switch (mode) {
+						case 0x00: // Full screen colour
+						case 0x01: // Full row colour
+						case 0x07: // Address row 0
+							// "this row only" or "down to bottom"
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x1f) | (intValue * 0x60));
+							break;
+						case 0x11 ... 0x13: // Invoke object
+							// Object source
+							//TODO POP and GPOP, if ((x26Triplet.address() & 0x08) == 0x08)
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData(intValue & 0x7f);
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setAddress((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).address() & 0x3e) | (intValue >> 7));
+							break;
+						case 0x1f: // Termination
+							// More follows/Last
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x06) | intValue);
+							break;
+					}
+				else
+					// Column address group
+					switch (mode) {
+						case 0x07: // Flash functions
+							// Flash rate and phase
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x03) | (intValue << 2));
+							break;
+						case 0x0c: // Display attributes
+							// Text size
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x36) | ((intValue & 0x02) << 5) | (intValue & 0x01));
+							break;
+						case 0x0e: // Font style
+							// Number of rows
+							m_parentMainWidget->document()->currentSubPage()->localEnhance[index.row()].setData((m_parentMainWidget->document()->currentSubPage()->localEnhance.at(index.row()).data() & 0x07) | (intValue << 4));
+							break;
+					}
+		}
+		emit dataChanged(index, index, {role});
+		m_parentMainWidget->refreshPage();
+		return true;
+	}
+	return false;
+}
+
+QVariant X26Model::headerData(int section, Qt::Orientation orientation, int role) const
+{
+	if (role == Qt::DisplayRole) {
+		if (orientation == Qt::Horizontal) {
+			switch (section) {
+				case 0:
+					return tr("Row");
+				case 1:
+					return tr("Col");
+				case 2:
+					return tr("Mode");
+				case 3:
+					return tr("Data");
+				default:
+					return QString("");
+			}
+		} else if (orientation == Qt::Vertical)
+			return QString("d%1 t%2").arg(section / 13).arg(section % 13);
+	}
+	return QVariant();
+}
+
+bool X26Model::insertFirstRow()
+{
+	X26Triplet firstTriplet;
+
+	firstTriplet.setAddress(63);
+	firstTriplet.setMode(31);
+	firstTriplet.setData(7);
+
+	beginInsertRows(QModelIndex(), 0, 0);
+	m_parentMainWidget->document()->currentSubPage()->localEnhance.insert(0, firstTriplet);
+	endInsertRows();
+	return true;
+}
+
+bool X26Model::insertRows(int position, int rows, const QModelIndex &parent)
+{
+	Q_UNUSED(parent);
+	X26Triplet copyTriplet = m_parentMainWidget->document()->currentSubPage()->localEnhance.at(position);
+
+	beginInsertRows(QModelIndex(), position, position+rows-1);
+	for (int row=0; row<rows; ++row)
+		m_parentMainWidget->document()->currentSubPage()->localEnhance.insert(position+row, copyTriplet);
+	endInsertRows();
+	return true;
+}
+
+bool X26Model::removeRows(int position, int rows, const QModelIndex &index)
+{
+	Q_UNUSED(index);
+	beginRemoveRows(QModelIndex(), position, position+rows-1);
+
+	for (int row=0; row<rows; ++row)
+		m_parentMainWidget->document()->currentSubPage()->localEnhance.removeAt(position+row);
+
+	endRemoveRows();
+	return true;
+}
+/*
+Qt::ItemFlags X26Model::flags(const QModelIndex &index) const
+{
+	if (!index.isValid())
+		return QAbstractItemModel::flags(index);
+
+	if (index.column() <= 1)
+		return QAbstractItemModel::flags(index);
+	if (index.column() >= 2)
+		return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
+
+	return QAbstractItemModel::flags(index);
+}
+*/

x26model.h

@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef X26MODEL_H
+#define X26MODEL_H
+
+#include <QAbstractListModel>
+#include "mainwidget.h"
+
+class X26Model : public QAbstractListModel
+{
+	Q_OBJECT
+
+public:
+	X26Model(TeletextWidget *parent);
+	void setX26ListLoaded(bool);
+	int rowCount(const QModelIndex &parent = QModelIndex()) const override ;
+	int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+	bool setData(const QModelIndex &index, const QVariant &value, int role);
+	QVariant headerData(int section, Qt::Orientation orientation, int role) const;
+	bool insertFirstRow();
+	bool insertRows(int position, int rows, const QModelIndex &parent);
+	bool removeRows(int position, int rows, const QModelIndex &index);
+//	Qt::ItemFlags flags(const QModelIndex &index) const;
+
+private:
+	TeletextWidget *m_parentMainWidget;
+	bool m_listLoaded;
+};
+
+static const QString modeTripletName[64] {
+	// Row triplet modes
+	"Full screen colour",
+	"Full row colour",
+	"Reserved 0x02",
+	"Reserved 0x03",
+
+	"Set Active Position",
+	"Reserved 0x05",
+	"Reserved 0x06",
+	"Address row 0",
+
+	"PDC origin, source",
+	"PDC month and day",
+	"PDC cursor and start hour",
+	"PDC cursor and end hour",
+
+	"PDC cursor local offset",
+	"PDC series ID and code",
+	"Reserved 0x0e",
+	"Reserved 0x0f",
+
+	"Origin modifier",
+	"Invoke active object",
+	"Invoke adaptive object",
+	"Invoke passive object",
+
+	"Reserved 0x14",
+	"Define active object",
+	"Define adaptive object",
+	"Define passive object",
+
+	"DRCS mode",
+	"Reserved 0x19",
+	"Reserved 0x1a",
+	"Reserved 0x1b",
+
+	"Reserved 0x1c",
+	"Reserved 0x1d",
+	"Reserved 0x1e",
+	"Termination marker",
+
+	// Column triplet modes
+	"Foreground colour",
+	"G1 character",
+	"G3 character, level 1.5",
+	"Background colour",
+
+	"Reserved 0x04",
+	"Reserved 0x05",
+	"PDC cursor, start end min",
+	"Additional flash functions",
+
+	"Modified G0/G2 character set",
+	"G0 character",
+	"Reserved 0x0a",
+	"G3 character, level 2.5",
+
+	"Display attributes",
+	"DRCS character",
+	"Font style",
+	"G2 character",
+
+	"G0 character no diacritical",
+	"G0 character diacritical 1",
+	"G0 character diacritical 2",
+	"G0 character diacritical 3",
+	"G0 character diacritical 4",
+	"G0 character diacritical 5",
+	"G0 character diacritical 6",
+	"G0 character diacritical 7",
+	"G0 character diacritical 8",
+	"G0 character diacritical 9",
+	"G0 character diacritical A",
+	"G0 character diacritical B",
+	"G0 character diacritical C",
+	"G0 character diacritical D",
+	"G0 character diacritical E",
+	"G0 character diacritical F"
+};
+
+#endif

x26triplets.cpp

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "x26triplets.h"
+
+void X26Triplet::setAddress(int newAddress) { myTriplet.m_address = newAddress; }
+void X26Triplet::setMode(int newMode) { myTriplet.m_mode = newMode; }
+void X26Triplet::setData(int newData) { myTriplet.m_data = newData; }
+void X26Triplet::setAddressRow(int newAddressRow) { myTriplet.m_address = (newAddressRow == 24) ? 40 : newAddressRow+40; }
+void X26Triplet::setAddressColumn(int newAddressColumn) { myTriplet.m_address = newAddressColumn; }

x26triplets.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef X26TRIPLETS_H
+#define X26TRIPLETS_H
+
+class X26Triplet
+{
+public:
+//	X26Triplet() {}
+//	X26Triplet(const X26Triplet &other);
+
+//	X26Triplet &operator=(const X26Triplet &other);
+
+	int address() const { return myTriplet.m_address; }
+	int mode() const { return myTriplet.m_mode; }
+	int data() const { return myTriplet.m_data; }
+	int addressRow() const { return (myTriplet.m_address == 40) ? 24 : myTriplet.m_address-40; }
+	int addressColumn() const { return (myTriplet.m_address); }
+	bool isRowTriplet() const { return (myTriplet.m_address >= 40); }
+
+	void setAddress(int);
+	void setMode(int);
+	void setData(int);
+	void setAddressRow(int);
+	void setAddressColumn(int);
+
+private:
+	struct x26TripletStruct {
+		int m_address;
+		int m_mode;
+		int m_data;
+	} myTriplet;
+};
+
+#endif

x28dockwidget.cpp

@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QCheckBox>
+#include <QComboBox>
+#include <QGridLayout>
+#include <QLabel>
+#include <QSpinBox>
+
+#include "x28dockwidget.h"
+
+X28DockWidget::X28DockWidget(TeletextWidget *parent): QDockWidget(parent)
+{
+	QGridLayout *x28Layout = new QGridLayout;
+	QWidget *x28Widget = new QWidget;
+
+	m_parentMainWidget = parent;
+
+	this->setObjectName("X28DockWidget");
+	this->setWindowTitle("X/28 enhancements");
+	x28Layout->addWidget(new QLabel(tr("Default screen colour")), 0, 0, 1, 1);
+	x28Layout->addWidget(new QLabel(tr("Default row colour")), 1, 0, 1, 1);
+	m_defaultScreenColourCombo = new QComboBox;
+	m_defaultRowColourCombo = new QComboBox;
+	for (int r=0; r<=3; r++)
+		for (int c=0; c<=7; c++) {
+			m_defaultScreenColourCombo->addItem(tr("CLUT %1:%2").arg(r).arg(c));
+			m_defaultRowColourCombo->addItem(tr("CLUT %1:%2").arg(r).arg(c));
+		}
+	x28Layout->addWidget(m_defaultScreenColourCombo, 0, 1, 1, 1, Qt::AlignTop);
+	connect(m_defaultScreenColourCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), [=](int index){ m_parentMainWidget->setDefaultScreenColour(index); });
+	x28Layout->addWidget(m_defaultRowColourCombo, 1, 1, 1, 1, Qt::AlignTop);
+	connect(m_defaultRowColourCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), [=](int index){ m_parentMainWidget->setDefaultRowColour(index); });
+	x28Layout->addWidget(new QLabel(tr("Colour remapping")), 2, 0, 1, 1);
+	m_colourTableCombo = new QComboBox;
+	m_colourTableCombo->addItem("Fore 0  Back 0");
+	m_colourTableCombo->addItem("Fore 0  Back 1");
+	m_colourTableCombo->addItem("Fore 0  Back 2");
+	m_colourTableCombo->addItem("Fore 1  Back 1");
+	m_colourTableCombo->addItem("Fore 1  Back 2");
+	m_colourTableCombo->addItem("Fore 2  Back 1");
+	m_colourTableCombo->addItem("Fore 2  Back 2");
+	m_colourTableCombo->addItem("Fore 2  Back 3");
+	x28Layout->addWidget(m_colourTableCombo, 2, 1, 1, 1, Qt::AlignTop);
+	connect(m_colourTableCombo, QOverload<int>::of(&QComboBox::currentIndexChanged), [=](int index){ m_parentMainWidget->setColourTableRemap(index); });
+	m_blackBackgroundSubstAct = new QCheckBox("Black background colour substitution");
+	x28Layout->addWidget(m_blackBackgroundSubstAct, 3, 0, 1, 2, Qt::AlignTop);
+	connect(m_blackBackgroundSubstAct, &QCheckBox::stateChanged, m_parentMainWidget, &TeletextWidget::setBlackBackgroundSubst);
+
+	x28Layout->addWidget(new QLabel(tr("Left side panel columns")), 4, 0, 1, 1);
+	m_leftSidePanelSpinBox = new QSpinBox(this);
+	m_leftSidePanelSpinBox->setMaximum(16);
+	x28Layout->addWidget(m_leftSidePanelSpinBox, 4, 1, 1, 1, Qt::AlignTop);
+	connect(m_leftSidePanelSpinBox, QOverload<int>::of(&QSpinBox::valueChanged), [=](int index){ setLeftSidePanelWidth(index); });
+
+	x28Layout->addWidget(new QLabel(tr("Right side panel columns")), 5, 0, 1, 1);
+	m_rightSidePanelSpinBox = new QSpinBox(this);
+	m_rightSidePanelSpinBox->setMaximum(16);
+	x28Layout->addWidget(m_rightSidePanelSpinBox, 5, 1, 1, 1, Qt::AlignTop);
+	connect(m_rightSidePanelSpinBox, QOverload<int>::of(&QSpinBox::valueChanged), [=](int index){ setRightSidePanelWidth(index); });
+
+	m_sidePanelStatusAct = new QCheckBox("Side panels at level 3.5 only");
+	x28Layout->addWidget(m_sidePanelStatusAct, 6, 0, 1, 2, Qt::AlignTop);
+	connect(m_sidePanelStatusAct, &QCheckBox::stateChanged, m_parentMainWidget, &TeletextWidget::setSidePanelAtL35Only);
+
+	x28Layout->setRowStretch(6, 1);
+	x28Widget->setLayout(x28Layout);
+	this->setWidget(x28Widget);
+}
+
+void X28DockWidget::setLeftSidePanelWidth(int newLeftPanelSize)
+{
+	if (newLeftPanelSize && m_rightSidePanelSpinBox->value()) {
+		int newRightPanelSize = 16-newLeftPanelSize;
+		m_rightSidePanelSpinBox->blockSignals(true);
+		m_rightSidePanelSpinBox->setValue(newRightPanelSize);
+		m_rightSidePanelSpinBox->blockSignals(false);
+	}
+	m_parentMainWidget->setSidePanelWidths(newLeftPanelSize, m_rightSidePanelSpinBox->value());
+}
+
+void X28DockWidget::setRightSidePanelWidth(int newRightPanelSize)
+{
+	if (newRightPanelSize && m_leftSidePanelSpinBox->value()) {
+		int newLeftPanelSize = 16-newRightPanelSize;
+		m_leftSidePanelSpinBox->blockSignals(true);
+		m_leftSidePanelSpinBox->setValue(newLeftPanelSize);
+		m_leftSidePanelSpinBox->blockSignals(false);
+	}
+	m_parentMainWidget->setSidePanelWidths(m_leftSidePanelSpinBox->value(), newRightPanelSize);
+}
+
+void X28DockWidget::updateWidgets()
+{
+	int leftSidePanelColumnsResult = 0;
+	int rightSidePanelColumnsResult = 0;
+
+	m_defaultScreenColourCombo->blockSignals(true);
+	m_defaultScreenColourCombo->setCurrentIndex(m_parentMainWidget->document()->currentSubPage()->defaultScreenColour());
+	m_defaultScreenColourCombo->blockSignals(false);
+	m_defaultRowColourCombo->blockSignals(true);
+	m_defaultRowColourCombo->setCurrentIndex(m_parentMainWidget->document()->currentSubPage()->defaultRowColour());
+	m_defaultRowColourCombo->blockSignals(false);
+	m_colourTableCombo->blockSignals(true);
+	m_colourTableCombo->setCurrentIndex(m_parentMainWidget->document()->currentSubPage()->colourTableRemap());
+	m_colourTableCombo->blockSignals(false);
+	m_blackBackgroundSubstAct->blockSignals(true);
+	m_blackBackgroundSubstAct->setChecked(m_parentMainWidget->document()->currentSubPage()->blackBackgroundSubst());
+	m_blackBackgroundSubstAct->blockSignals(false);
+
+	if (m_parentMainWidget->document()->currentSubPage()->leftSidePanelDisplayed())
+		leftSidePanelColumnsResult = (m_parentMainWidget->document()->currentSubPage()->sidePanelColumns() == 0) ? 16 : m_parentMainWidget->document()->currentSubPage()->sidePanelColumns();
+
+	if (m_parentMainWidget->document()->currentSubPage()->rightSidePanelDisplayed())
+		rightSidePanelColumnsResult = 16-m_parentMainWidget->document()->currentSubPage()->sidePanelColumns();
+
+	m_leftSidePanelSpinBox->blockSignals(true);
+	m_leftSidePanelSpinBox->setValue(leftSidePanelColumnsResult);
+	m_leftSidePanelSpinBox->blockSignals(false);
+	m_rightSidePanelSpinBox->blockSignals(true);
+	m_rightSidePanelSpinBox->setValue(rightSidePanelColumnsResult);
+	m_rightSidePanelSpinBox->blockSignals(false);
+	m_sidePanelStatusAct->blockSignals(true);
+	m_sidePanelStatusAct->setChecked(!m_parentMainWidget->document()->currentSubPage()->sidePanelStatusL25());
+	m_sidePanelStatusAct->blockSignals(false);
+}

x28dockwidget.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QTeletextMaker is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef X28DOCKWIDGET_H
+#define X28DOCKWIDGET_H
+
+#include <QCheckBox>
+#include <QComboBox>
+#include <QDockWidget>
+#include <QSpinBox>
+
+#include "mainwidget.h"
+
+class X28DockWidget : public QDockWidget
+{
+	Q_OBJECT
+
+public:
+	X28DockWidget(TeletextWidget *parent);
+	void updateWidgets();
+
+private:
+	void setLeftSidePanelWidth(int);
+	void setRightSidePanelWidth(int);
+
+	TeletextWidget *m_parentMainWidget;
+	QComboBox *m_defaultScreenColourCombo, *m_defaultRowColourCombo, *m_colourTableCombo;
+	QCheckBox *m_blackBackgroundSubstAct, *m_sidePanelStatusAct;
+	QSpinBox *m_leftSidePanelSpinBox, *m_rightSidePanelSpinBox;
+};
+
+#endif