Set new object definitions to Levels 2.5 and 3.5

Closes GH-14 where flashing text in Mix mode would not flash to the
transparent background.

The bundled QtGifImage does not expose a way to change the DisposalMode in
giflib and thus it is fixed at 0 or DISPOSAL_UNSPECIFIED. This is a quick and
dirty change to fix it to 2 or DISPOSAL_BACKGROUND for our needs.

A proper fix would be to fork QtGifImage and add a more accessible API call
to choose the DisposalMode value.

3rdparty/QtGifImage/include/gifimage/qgifimage.cpp

@@ -306,7 +306,7 @@ bool QGifImagePrivate::save(QIODevice *device) const {
 	}
 
 	GraphicsControlBlock gcbBlock;
-	gcbBlock.DisposalMode = 0;
+	gcbBlock.DisposalMode = 2;
 	gcbBlock.UserInputFlag = false;
 	gcbBlock.TransparentColor = getFrameTransparentColorIndex(frameInfo);
 

src/qteletextdecoder/decode.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextdecoder/decode.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextdecoder/drcspage.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -36,6 +36,11 @@ DRCSPage::DRCSPage(const PageBase &other)
 		setControlBit(b, other.controlBit(b));
 }
 
+PageBase::PageFunctionEnum DRCSPage::pageFunction() const
+{
+	return PFGlobalPOP;
+}
+
 int DRCSPage::drcsMode(int c) const
 {
 	if (!packetExists(28, 3))

src/qteletextdecoder/drcspage.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -30,8 +30,7 @@ public:
 	DRCSPage(const PageBase &other);
 
 	// TODO PFNormalPOP as well?
-	PageFunctionEnum pageFunction() const { return PFGlobalPOP; }
+	PageFunctionEnum pageFunction() const;
-	PacketCodingEnum packetCoding() const override { return Coding7bit; }
 
 	int drcsMode(int c) const;
 	bool ptu(int c, uchar *data) const;

src/qteletextdecoder/levelonepage.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -295,10 +295,47 @@ bool LevelOnePage::setControlBit(int b, bool active)
 	return PageX26Base::setControlBit(b, active);
 }
 
+int LevelOnePage::maxEnhancements() const
+{
+	return 208;
+}
+
 /* void LevelOnePage::setSubPageNumber(int newSubPageNumber) { m_subPageNumber = newSubPageNumber; } */
-void LevelOnePage::setCycleValue(int newValue) { m_cycleValue = newValue; };
+
-void LevelOnePage::setCycleType(CycleTypeEnum newType) { m_cycleType = newType; }
+int LevelOnePage::cycleValue() const
-void LevelOnePage::setDefaultCharSet(int newDefaultCharSet) { m_defaultCharSet = newDefaultCharSet; }
+{
+	return m_cycleValue;
+}
+
+void LevelOnePage::setCycleValue(int newValue)
+{
+	m_cycleValue = newValue;
+}
+
+LevelOnePage::CycleTypeEnum LevelOnePage::cycleType() const
+{
+	return m_cycleType;
+}
+
+void LevelOnePage::setCycleType(CycleTypeEnum newType)
+{
+	m_cycleType = newType;
+}
+
+int LevelOnePage::defaultCharSet() const
+{
+	return m_defaultCharSet;
+}
+
+void LevelOnePage::setDefaultCharSet(int newDefaultCharSet)
+{
+	m_defaultCharSet = newDefaultCharSet;
+}
+
+int LevelOnePage::defaultNOS() const
+{
+	return m_defaultNOS;
+}
 
 void LevelOnePage::setDefaultNOS(int defaultNOS)
 {
@@ -309,6 +346,11 @@ void LevelOnePage::setDefaultNOS(int defaultNOS)
 	PageX26Base::setControlBit(C14NOS, m_defaultNOS & 0x4);
 }
 
+int LevelOnePage::secondCharSet() const
+{
+	return m_secondCharSet;
+}
+
 void LevelOnePage::setSecondCharSet(int newSecondCharSet)
 {
 	m_secondCharSet = newSecondCharSet;
@@ -316,8 +358,18 @@ void LevelOnePage::setSecondCharSet(int newSecondCharSet)
 		m_secondNOS = 0x7;
 }
 
+int LevelOnePage::secondNOS() const
+{
+	return m_secondNOS;
+}
+
 void LevelOnePage::setSecondNOS(int newSecondNOS) { m_secondNOS = newSecondNOS; }
 
+unsigned char LevelOnePage::character(int r, int c) const
+{
+	return PageX26Base::packetExists(r) ? PageX26Base::packet(r).at(c) : 0x20;
+}
+
 void LevelOnePage::setCharacter(int r, int c, unsigned char newCharacter)
 {
 	QByteArray pkt;
@@ -338,10 +390,45 @@ void LevelOnePage::setCharacter(int r, int c, unsigned char newCharacter)
 	}
 }
 
-void LevelOnePage::setDefaultScreenColour(int newDefaultScreenColour) { m_defaultScreenColour = newDefaultScreenColour; }
+int LevelOnePage::defaultScreenColour() const
-void LevelOnePage::setDefaultRowColour(int newDefaultRowColour) { m_defaultRowColour = newDefaultRowColour; }
+{
-void LevelOnePage::setColourTableRemap(int newColourTableRemap) { m_colourTableRemap = newColourTableRemap; }
+	return m_defaultScreenColour;
-void LevelOnePage::setBlackBackgroundSubst(bool newBlackBackgroundSubst) { m_blackBackgroundSubst = newBlackBackgroundSubst; }
+}
+
+void LevelOnePage::setDefaultScreenColour(int newDefaultScreenColour)
+{
+	m_defaultScreenColour = newDefaultScreenColour;
+}
+
+int LevelOnePage::defaultRowColour() const
+{
+	return m_defaultRowColour;
+}
+
+void LevelOnePage::setDefaultRowColour(int newDefaultRowColour)
+{
+	m_defaultRowColour = newDefaultRowColour;
+}
+
+int LevelOnePage::colourTableRemap() const
+{
+	return m_colourTableRemap;
+}
+
+void LevelOnePage::setColourTableRemap(int newColourTableRemap)
+{
+	m_colourTableRemap = newColourTableRemap;
+}
+
+bool LevelOnePage::blackBackgroundSubst() const
+{
+	return m_blackBackgroundSubst;
+}
+
+void LevelOnePage::setBlackBackgroundSubst(bool newBlackBackgroundSubst)
+{
+	m_blackBackgroundSubst = newBlackBackgroundSubst;
+}
 
 int LevelOnePage::CLUT(int index, int renderLevel) const
 {
@@ -420,7 +507,8 @@ int LevelOnePage::dCLUT(bool globalDrcs, int mode, int index) const
 
 void LevelOnePage::setDCLUT(bool globalDrcs, int mode, int index, int colour)
 {
-	const QByteArray defaultPkt = QByteArray("\x01\x00\x00\x00\x20\x20\x18\x00\x02\x22\x01\x08\x08\x06\x24\x22\x39\x20\x12\x2a\x05\x2b\x39\x1e\x20\x20\x18\x10\x0a\x26\x03\x0a\x29\x16\x2c\x26\x3b\x01\x00\x00", 40);
+	// Default DCLUT as per D.1.6 and D.2.2 in the ETSI spec
+	const QByteArray defaultPkt = QByteArrayLiteral("\x01\x00\x00\x00\x20\x20\x18\x00\x02\x22\x01\x08\x08\x06\x24\x22\x39\x20\x12\x2a\x05\x2b\x39\x1e\x20\x20\x18\x10\x0a\x26\x03\x0a\x29\x16\x2c\x26\x3b\x01\x00\x00");
 
 	if (!packetExists(28, 1))
 		setPacket(28, 1, defaultPkt);
@@ -552,36 +640,101 @@ int LevelOnePage::levelRequired() const
 	return levelSeen;
 }
 
-void LevelOnePage::setLeftSidePanelDisplayed(bool newLeftSidePanelDisplayed) { m_leftSidePanelDisplayed = newLeftSidePanelDisplayed; }
+bool LevelOnePage::leftSidePanelDisplayed() const
-void LevelOnePage::setRightSidePanelDisplayed(bool newRightSidePanelDisplayed) { m_rightSidePanelDisplayed = newRightSidePanelDisplayed; }
+{
-void LevelOnePage::setSidePanelColumns(int newSidePanelColumns) { m_sidePanelColumns = newSidePanelColumns; }
+	return m_leftSidePanelDisplayed;
-void LevelOnePage::setSidePanelStatusL25(bool newSidePanelStatusL25) { m_sidePanelStatusL25 = newSidePanelStatusL25; }
+}
+
+void LevelOnePage::setLeftSidePanelDisplayed(bool newLeftSidePanelDisplayed)
+{
+	m_leftSidePanelDisplayed = newLeftSidePanelDisplayed;
+}
+
+bool LevelOnePage::rightSidePanelDisplayed() const
+{
+	return m_rightSidePanelDisplayed;
+}
+
+void LevelOnePage::setRightSidePanelDisplayed(bool newRightSidePanelDisplayed)
+{
+	m_rightSidePanelDisplayed = newRightSidePanelDisplayed;
+}
+
+int LevelOnePage::sidePanelColumns() const
+{
+	return m_sidePanelColumns;
+}
+
+void LevelOnePage::setSidePanelColumns(int newSidePanelColumns)
+{
+	m_sidePanelColumns = newSidePanelColumns;
+}
+
+bool LevelOnePage::sidePanelStatusL25() const
+{
+	return m_sidePanelStatusL25;
+}
+
+void LevelOnePage::setSidePanelStatusL25(bool newSidePanelStatusL25)
+{
+	m_sidePanelStatusL25 = newSidePanelStatusL25;
+}
+
+int LevelOnePage::fastTextLinkPageNumber(int linkNumber) const
+{
+	return m_fastTextLink[linkNumber].pageNumber;
+}
 
 void LevelOnePage::setFastTextLinkPageNumber(int linkNumber, int pageNumber)
 {
 	m_fastTextLink[linkNumber].pageNumber = pageNumber;
 }
 
+int LevelOnePage::composeLinkFunction(int linkNumber) const
+{
+	return m_composeLink[linkNumber].function;
+}
+
 void LevelOnePage::setComposeLinkFunction(int linkNumber, int newFunction)
 {
 	m_composeLink[linkNumber].function = newFunction;
 }
 
+bool LevelOnePage::composeLinkLevel2p5(int linkNumber) const
+{
+	return m_composeLink[linkNumber].level2p5;
+}
+
 void LevelOnePage::setComposeLinkLevel2p5(int linkNumber, bool newRequired)
 {
 	m_composeLink[linkNumber].level2p5 = newRequired;
 }
 
+bool LevelOnePage::composeLinkLevel3p5(int linkNumber) const
+{
+	return m_composeLink[linkNumber].level3p5;
+}
+
 void LevelOnePage::setComposeLinkLevel3p5(int linkNumber, bool newRequired)
 {
 	m_composeLink[linkNumber].level3p5 = newRequired;
 }
 
+int LevelOnePage::composeLinkPageNumber(int linkNumber) const
+{
+	return m_composeLink[linkNumber].pageNumber;
+}
+
 void LevelOnePage::setComposeLinkPageNumber(int linkNumber, int newPageNumber)
 {
 	m_composeLink[linkNumber].pageNumber = newPageNumber;
 }
 
+int LevelOnePage::composeLinkSubPageCodes(int linkNumber) const
+{
+	return m_composeLink[linkNumber].subPageCodes;
+}
+
 void LevelOnePage::setComposeLinkSubPageCodes(int linkNumber, int newSubPageCodes)
 {
 	m_composeLink[linkNumber].subPageCodes = newSubPageCodes;

src/qteletextdecoder/levelonepage.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -42,9 +42,6 @@ public:
 	LevelOnePage();
 	LevelOnePage(const PageBase &other);
 
-	PageFunctionEnum pageFunction() const override { return PFLevelOnePage; }
-	PacketCodingEnum packetCoding() const override { return Coding7bit; }
-
 	bool isEmpty() const override;
 
 	QByteArray packet(int y, int d) const override;
@@ -55,30 +52,30 @@ public:
 
 	void clearPage();
 
-	int maxEnhancements() const override { return 208; };
+	int maxEnhancements() const override;
 
 /*	void setSubPageNumber(int); */
-	int cycleValue() const { return m_cycleValue; };
+	int cycleValue() const;
 	void setCycleValue(int newValue);
-	CycleTypeEnum cycleType() const { return m_cycleType; };
+	CycleTypeEnum cycleType() const;
 	void setCycleType(CycleTypeEnum newType);
-	int defaultCharSet() const { return m_defaultCharSet; }
+	int defaultCharSet() const;
 	void setDefaultCharSet(int newDefaultCharSet);
-	int defaultNOS() const { return m_defaultNOS; }
+	int defaultNOS() const;
 	void setDefaultNOS(int defaultNOS);
-	int secondCharSet() const { return m_secondCharSet; }
+	int secondCharSet() const;
 	void setSecondCharSet(int newSecondCharSet);
-	int secondNOS() const { return m_secondNOS; }
+	int secondNOS() const;
 	void setSecondNOS(int newSecondNOS);
-	unsigned char character(int r, int c) const { return PageX26Base::packetExists(r) ? PageX26Base::packet(r).at(c) : 0x20; }
+	unsigned char character(int r, int c) const;
 	void setCharacter(int r, int c, unsigned char newChar);
-	int defaultScreenColour() const { return m_defaultScreenColour; }
+	int defaultScreenColour() const;
 	void setDefaultScreenColour(int newDefaultScreenColour);
-	int defaultRowColour() const { return m_defaultRowColour; }
+	int defaultRowColour() const;
 	void setDefaultRowColour(int newDefaultRowColour);
-	int colourTableRemap() const { return m_colourTableRemap; }
+	int colourTableRemap() const;
 	void setColourTableRemap(int newColourTableRemap);
-	bool blackBackgroundSubst() const { return m_blackBackgroundSubst; }
+	bool blackBackgroundSubst() const;
 	void setBlackBackgroundSubst(bool newBlackBackgroundSubst);
 	int CLUT(int index, int renderLevel=3) const;
 	void setCLUT(int index, int newColour);
@@ -88,25 +85,25 @@ public:
 	int dCLUT(bool globalDrcs, int mode, int index) const;
 	void setDCLUT(bool globalDrcs, int mode, int index, int colour);
 	int levelRequired() const;
-	bool leftSidePanelDisplayed() const { return m_leftSidePanelDisplayed; }
+	bool leftSidePanelDisplayed() const;
 	void setLeftSidePanelDisplayed(bool newLeftSidePanelDisplayed);
-	bool rightSidePanelDisplayed() const { return m_rightSidePanelDisplayed; }
+	bool rightSidePanelDisplayed() const;
 	void setRightSidePanelDisplayed(bool newRightSidePanelDisplayed);
-	int sidePanelColumns() const { return m_sidePanelColumns; }
+	int sidePanelColumns() const;
 	void setSidePanelColumns(int newSidePanelColumns);
-	bool sidePanelStatusL25() const { return m_sidePanelStatusL25; }
+	bool sidePanelStatusL25() const;
 	void setSidePanelStatusL25(bool newSidePanelStatusL25);
-	int fastTextLinkPageNumber(int linkNumber) const { return m_fastTextLink[linkNumber].pageNumber; }
+	int fastTextLinkPageNumber(int linkNumber) const;
 	void setFastTextLinkPageNumber(int linkNumber, int pageNumber);
-	int composeLinkFunction(int linkNumber) const { return m_composeLink[linkNumber].function; }
+	int composeLinkFunction(int linkNumber) const;
 	void setComposeLinkFunction(int linkNumber, int newFunction);
-	bool composeLinkLevel2p5(int linkNumber) const { return m_composeLink[linkNumber].level2p5; }
+	bool composeLinkLevel2p5(int linkNumber) const;
 	void setComposeLinkLevel2p5(int linkNumber, bool newRequired);
-	bool composeLinkLevel3p5(int linkNumber) const { return m_composeLink[linkNumber].level3p5; }
+	bool composeLinkLevel3p5(int linkNumber) const;
 	void setComposeLinkLevel3p5(int linkNumber, bool newRequired);
-	int composeLinkPageNumber(int linkNumber) const { return m_composeLink[linkNumber].pageNumber; }
+	int composeLinkPageNumber(int linkNumber) const;
 	void setComposeLinkPageNumber(int linkNumber, int newPageNumber);
-	int composeLinkSubPageCodes(int linkNumber) const { return m_composeLink[linkNumber].subPageCodes; }
+	int composeLinkSubPageCodes(int linkNumber) const;
 	void setComposeLinkSubPageCodes(int linkNumber, int newSubPageCodes);
 
 private:

src/qteletextdecoder/pagebase.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -27,6 +27,24 @@ PageBase::PageBase()
 		m_controlBits[b] = false;
 }
 
+PageBase::PageFunctionEnum PageBase::pageFunction() const
+{
+	return PFLevelOnePage;
+}
+
+PageBase::PacketCodingEnum PageBase::packetCoding() const
+{
+	return Coding7bit;
+}
+
+PageBase::PacketCodingEnum PageBase::packetCoding(int y, int d) const
+{
+	if (y == 27 && d < 4)
+		return Coding4bit;
+	else
+		return Coding18bit;
+}
+
 bool PageBase::isEmpty() const
 {
 	for (int y=0; y<26; y++)
@@ -40,6 +58,16 @@ bool PageBase::isEmpty() const
 	return true;
 }
 
+QByteArray PageBase::packet(int y) const
+{
+	return m_displayPackets[y];
+}
+
+QByteArray PageBase::packet(int y, int d) const
+{
+	return m_designationPackets[y-26][d];
+}
+
 bool PageBase::setPacket(int y, QByteArray pkt)
 {
 	m_displayPackets[y] = pkt;
@@ -54,6 +82,16 @@ bool PageBase::setPacket(int y, int d, QByteArray pkt)
 	return true;
 }
 
+bool PageBase::packetExists(int y) const
+{
+	return !m_displayPackets[y].isEmpty();
+}
+
+bool PageBase::packetExists(int y, int d) const
+{
+	return !m_designationPackets[y-26][d].isEmpty();
+}
+
 bool PageBase::clearPacket(int y)
 {
 	m_displayPackets[y] = QByteArray();
@@ -77,6 +115,11 @@ void PageBase::clearAllPackets()
 			clearPacket(y, d);
 }
 
+bool PageBase::controlBit(int b) const
+{
+	return m_controlBits[b];
+}
+
 bool PageBase::setControlBit(int b, bool active)
 {
 	m_controlBits[b] = active;

src/qteletextdecoder/pagebase.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -22,36 +22,34 @@
 
 #include <QByteArray>
 
-// 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 PageBase
-class PageBase //: public QObject
 {
-	//Q_OBJECT
-
 public:
 	enum ControlBitsEnum { C4ErasePage, C5Newsflash, C6Subtitle, C7SuppressHeader, C8Update, C9InterruptedSequence, C10InhibitDisplay, C11SerialMagazine, C12NOS, C13NOS, C14NOS };
 	// Available Page Functions according to 9.4.2.1 of the spec
-	enum PageFunctionEnum { PFUnknown = -1, PFLevelOnePage, PFDataBroadcasting, PFGlobalPOP, PFNormalPOP, PFGlobalDRCS, PFNormalDRCS, PFMOT, PFMIP, PFBasicTOPTable, PFAdditionalInformationTable, PFMultiPageTable, PFMultiPageExtensionTable, PFTriggerMessages };
+	enum PageFunctionEnum { PFLevelOnePage, PFDataBroadcasting, PFGlobalPOP, PFNormalPOP, PFGlobalDRCS, PFNormalDRCS, PFMOT, PFMIP, PFBasicTOPTable, PFAdditionalInformationTable, PFMultiPageTable, PFMultiPageExtensionTable, PFTriggerMessages };
 	// Available Page Codings of X/1 to X/25 according to 9.4.2.1 of the spec
-	enum PacketCodingEnum { CodingUnknown = -1, Coding7bit, Coding8bit, Coding18bit, Coding4bit, Coding4bitThen7bit, CodingPerPacket };
+	enum PacketCodingEnum { Coding7bit, Coding8bit, Coding18bit, Coding4bit, Coding4bitThen7bit, CodingPerPacket };
 
 	PageBase();
 
-	virtual PageFunctionEnum pageFunction() const { return PFUnknown; }
+	virtual PageFunctionEnum pageFunction() const;
-	virtual PacketCodingEnum packetCoding() const { return CodingUnknown; }
+	virtual PacketCodingEnum packetCoding() const;
+	virtual PacketCodingEnum packetCoding(int y, int d) const;
 
 	virtual bool isEmpty() const;
 
-	virtual QByteArray packet(int y) const { return m_displayPackets[y]; }
+	virtual QByteArray packet(int y) const;
-	virtual QByteArray packet(int y, int d) const { return m_designationPackets[y-26][d]; }
+	virtual QByteArray packet(int y, int d) const;
 	virtual bool setPacket(int y, QByteArray pkt);
 	virtual bool setPacket(int y, int d, QByteArray pkt);
-	virtual bool packetExists(int y) const { return !m_displayPackets[y].isEmpty(); }
+	virtual bool packetExists(int y) const;
-	virtual bool packetExists(int y, int d) const { return !m_designationPackets[y-26][d].isEmpty(); }
+	virtual bool packetExists(int y, int d) const;
 	virtual bool clearPacket(int y);
 	virtual bool clearPacket(int y, int d);
 	virtual void clearAllPackets();
 
-	virtual bool controlBit(int b) const { return m_controlBits[b]; }
+	virtual bool controlBit(int b) const;
 	virtual bool setControlBit(int b, bool active);
 
 private:

src/qteletextdecoder/pagex26base.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -21,6 +21,11 @@
 
 #include "pagex26base.h"
 
+X26TripletList *PageX26Base::enhancements()
+{
+	return &m_enhancements;
+}
+
 QByteArray PageX26Base::packetFromEnhancementList(int p) const
 {
 	QByteArray result(40, 0x00);
@@ -31,9 +36,13 @@ QByteArray PageX26Base::packetFromEnhancementList(int p) const
 		const int enhanceListPointer = p*13+t;
 
 		if (enhanceListPointer < m_enhancements.size()) {
+			if (!m_enhancements.at(enhanceListPointer).isValid())
+				result[t*3+1] = result[t*3+2] = result[t*3+3] = 0xff;
+			else {
 				result[t*3+1] = m_enhancements.at(enhanceListPointer).address();
 				result[t*3+2] = m_enhancements.at(enhanceListPointer).mode() | ((m_enhancements.at(enhanceListPointer).data() & 1) << 5);
 				result[t*3+3] = m_enhancements.at(enhanceListPointer).data() >> 1;
+			}
 
 			// If this is the last triplet, get a copy to repeat to the end of the packet
 			if (enhanceListPointer == m_enhancements.size()-1) {
@@ -59,19 +68,24 @@ QByteArray PageX26Base::packetFromEnhancementList(int p) const
 void PageX26Base::setEnhancementListFromPacket(int p, QByteArray pkt)
 {
 	// Preallocate entries in the m_enhancements list to hold our incoming triplets.
-	// We write "dummy" reserved 11110 Row Triplets in the allocated entries which then get overwritten by the packet contents.
+	// We write invalid triplets in the allocated entries which then get overwritten by the packet contents.
 	// This is in case of missing packets so we can keep Local Object pointers valid.
 	while (m_enhancements.size() < (p+1)*13)
-		m_enhancements.append( X26Triplet{ 41, 0x1e, 0 } );
+		m_enhancements.append( X26Triplet{ 0xff, 0xff, 0xff } );
 
 	X26Triplet newX26Triplet;
 
 	for (int t=0; t<13; t++) {
 		const int enhanceListPointer = p*13+t;
 
+		// Need the "& 0xff" since QByteArray.at() returns (signed) chars
+		if ((pkt.at(t*3+2) & 0xff) == 0xff)
+			newX26Triplet.setInvalid();
+		else {
 			newX26Triplet.setAddress(pkt.at(t*3+1) & 0x3f);
 			newX26Triplet.setMode(pkt.at(t*3+2) & 0x1f);
 			newX26Triplet.setData(((pkt.at(t*3+3) & 0x3f) << 1) | ((pkt.at(t*3+2) & 0x20) >> 5));
+		}
 		m_enhancements.replace(enhanceListPointer, newX26Triplet);
 	}
 	if (newX26Triplet.mode() == 0x1f && newX26Triplet.address() == 0x3f && newX26Triplet.data() & 0x01)
@@ -79,3 +93,8 @@ void PageX26Base::setEnhancementListFromPacket(int p, QByteArray pkt)
 		while (m_enhancements.size()>1 && m_enhancements.at(m_enhancements.size()-2).mode() == 0x1f && m_enhancements.at(m_enhancements.size()-2).address() == 0x3f && m_enhancements.at(m_enhancements.size()-2).data() == newX26Triplet.data())
 			m_enhancements.removeLast();
 }
+
+bool PageX26Base::packetFromEnhancementListNeeded(int n) const
+{
+	return ((m_enhancements.size()+12) / 13) > n;
+}

src/qteletextdecoder/pagex26base.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -26,18 +26,16 @@
 #include "pagebase.h"
 #include "x26triplets.h"
 
-class PageX26Base : public PageBase //: public QObject
+class PageX26Base : public PageBase
 {
-	//Q_OBJECT
-
 public:
-	X26TripletList *enhancements() { return &m_enhancements; };
+	X26TripletList *enhancements();
 	virtual int maxEnhancements() const =0;
 
 protected:
 	QByteArray packetFromEnhancementList(int p) const;
 	void setEnhancementListFromPacket(int p, QByteArray pkt);
-	bool packetFromEnhancementListNeeded(int n) const { return ((m_enhancements.size()+12) / 13) > n; };
+	bool packetFromEnhancementListNeeded(int n) const;
 
 	X26TripletList m_enhancements;
 };

src/qteletextdecoder/render.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextdecoder/render.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextdecoder/x26triplets.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -26,6 +26,51 @@ X26Triplet::X26Triplet(int address, int mode, int data)
 	m_data = data;
 }
 
+bool X26Triplet::isValid() const
+{
+	return m_mode != 0xff;
+}
+
+int X26Triplet::address() const
+{
+	return m_address;
+}
+
+int X26Triplet::mode() const
+{
+	return m_mode;
+}
+
+int X26Triplet::modeExt() const
+{
+	return (m_address >= 40) ? m_mode : (m_mode | 0x20);
+}
+
+int X26Triplet::data() const
+{
+	return m_data;
+}
+
+int X26Triplet::addressRow() const
+{
+	return (m_address == 40) ? 24 :m_address-40;
+}
+
+int X26Triplet::addressColumn() const
+{
+	return (m_address);
+}
+
+bool X26Triplet::isRowTriplet() const
+{
+	return (m_address >= 40);
+}
+
+void X26Triplet::setInvalid()
+{
+	m_address = m_mode = m_data = 0xff;
+}
+
 void X26Triplet::setAddress(int address)
 {
 	m_address = address;
@@ -51,6 +96,26 @@ void X26Triplet::setAddressColumn(int addressColumn)
 	m_address = addressColumn;
 }
 
+int X26Triplet::objectSource() const
+{
+	return (m_address & 0x18) >> 3;
+}
+
+int X26Triplet::objectLocalDesignationCode() const
+{
+	return (((m_address & 0x01) << 3) | (m_data >> 4));
+}
+
+int X26Triplet::objectLocalTripletNumber() const
+{
+	return m_data & 0x0f;
+}
+
+int X26Triplet::objectLocalIndex() const
+{
+	return objectLocalDesignationCode() * 13 + objectLocalTripletNumber();
+}
+
 void X26Triplet::setObjectLocalDesignationCode(int i)
 {
 	m_address = (m_address & 0x38) | (i >> 3);
@@ -68,6 +133,46 @@ void X26Triplet::setObjectLocalIndex(int i)
 	m_data = (((i / 13) & 0x07) << 4) | (i % 13);
 }
 
+int X26Triplet::activePositionRow() const
+{
+	return m_activePositionRow;
+}
+
+int X26Triplet::activePositionColumn() const
+{
+	return m_activePositionColumn;
+}
+
+int X26Triplet::activePositionRow1p5() const
+{
+	return m_activePositionRow1p5;
+}
+
+int X26Triplet::activePositionColumn1p5() const
+{
+	return m_activePositionColumn1p5;
+}
+
+X26Triplet::X26TripletError X26Triplet::error() const
+{
+	return m_error;
+}
+
+bool X26Triplet::reservedMode() const
+{
+	return m_reservedMode;
+}
+
+bool X26Triplet::reservedData() const
+{
+	return m_reservedData;
+}
+
+bool X26Triplet::activePosition1p5Differs() const
+{
+	return m_activePosition1p5Differs;
+}
+
 
 void X26TripletList::updateInternalData()
 {
@@ -85,7 +190,9 @@ void X26TripletList::updateInternalData()
 		triplet->m_reservedMode = false;
 		triplet->m_reservedData = false;
 
-		if (triplet->isRowTriplet()) {
+		if (!triplet->isValid())
+			triplet->m_error = X26Triplet::ErrorDecodingTriplet;
+		else if (triplet->isRowTriplet()) {
 			switch (triplet->modeExt()) {
 				case 0x00: // Full screen colour
 					if (activePosition.isDeployed())
@@ -239,17 +346,16 @@ void X26TripletList::updateInternalData()
 			case 0x2f: // G2 character
 				activePosition.setColumn(triplet->addressColumn());
 
-				if (activePosition.row() != triplet->m_activePositionRow || activePosition.column() != triplet->m_activePositionColumn)
+				triplet->m_activePosition1p5Differs = activePosition.row() != triplet->m_activePositionRow || activePosition.column() != triplet->m_activePositionColumn;
-					triplet->m_activePosition1p5Differs = true;
 				break;
 			default:
 				if (triplet->modeExt() >= 0x30 && triplet->modeExt() <= 0x3f) {
 					// G0 diacritical mark
 					activePosition.setColumn(triplet->addressColumn());
 
-					if (activePosition.row() != triplet->m_activePositionRow || activePosition.column() != triplet->m_activePositionColumn)
+					triplet->m_activePosition1p5Differs = activePosition.row() != triplet->m_activePositionRow || activePosition.column() != triplet->m_activePositionColumn;
-						triplet->m_activePosition1p5Differs = true;
+				} else
-				}
+					triplet->m_activePosition1p5Differs = false;
 		}
 
 		triplet->m_activePositionRow1p5 = activePosition.row();
@@ -282,6 +388,35 @@ void X26TripletList::replace(int i, const X26Triplet &value)
 	updateInternalData();
 }
 
+void X26TripletList::removeLast()
+{
+	m_list.removeLast();
+}
+
+const X26Triplet &X26TripletList::at(int i) const
+{
+	return m_list.at(i);
+}
+
+bool X26TripletList::isEmpty() const
+{
+	return m_list.isEmpty();
+}
+
+void X26TripletList::reserve(int alloc)
+{
+	m_list.reserve(alloc);
+}
+
+int X26TripletList::size() const
+{
+	return m_list.size();
+}
+
+const QList<int> &X26TripletList::objects(int t) const
+{
+	return m_objects[t];
+};
 
 X26TripletList::ActivePosition::ActivePosition()
 {
@@ -293,6 +428,21 @@ void X26TripletList::ActivePosition::reset()
 	m_row = m_column = -1;
 }
 
+int X26TripletList::ActivePosition::row() const
+{
+	return m_row; // return (m_row == -1) ? 0 : m_row;
+}
+
+int X26TripletList::ActivePosition::column() const
+{
+	return m_column; // return (m_column == -1) ? 0 : m_column;
+}
+
+bool X26TripletList::ActivePosition::isDeployed() const
+{
+	return m_row != -1;
+}
+
 bool X26TripletList::ActivePosition::setRow(int row)
 {
 	if (row < m_row)

src/qteletextdecoder/x26triplets.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -26,7 +26,7 @@ class X26Triplet
 {
 public:
 	// x26model.h has the Plain English descriptions of these errors
-	enum X26TripletError { NoError, ActivePositionMovedUp, ActivePositionMovedLeft, InvokePointerInvalid, InvokeTypeMismatch, OriginModifierAlone };
+	enum X26TripletError { NoError, ErrorDecodingTriplet, ActivePositionMovedUp, ActivePositionMovedLeft, InvokePointerInvalid, InvokeTypeMismatch, OriginModifierAlone };
 	enum ObjectSource { InvalidObjectSource, LocalObject, POPObject, GPOPObject };
 
 	X26Triplet() {}
@@ -36,37 +36,39 @@ public:
 
 	X26Triplet(int address, int mode, int data);
 
-	int address() const { return m_address; }
+	bool isValid() const;
-	int mode() const { return m_mode; }
+	int address() const;
-	int modeExt() const { return (m_address >= 40) ? m_mode : (m_mode | 0x20); }
+	int mode() const;
-	int data() const { return m_data; }
+	int modeExt() const;
-	int addressRow() const { return (m_address == 40) ? 24 :m_address-40; }
+	int data() const;
-	int addressColumn() const { return (m_address); }
+	int addressRow() const;
-	bool isRowTriplet() const { return (m_address >= 40); }
+	int addressColumn() const;
+	bool isRowTriplet() const;
 
+	void setInvalid();
 	void setAddress(int address);
 	void setMode(int mode);
 	void setData(int data);
 	void setAddressRow(int addressRow);
 	void setAddressColumn(int addressColumn);
 
-	int objectSource() const { return (m_address & 0x18) >> 3; }
+	int objectSource() const;
 
-	int objectLocalDesignationCode() const { return (((m_address & 0x01) << 3) | (m_data >> 4)); }
+	int objectLocalDesignationCode() const;
-	int objectLocalTripletNumber() const { return m_data & 0x0f; }
+	int objectLocalTripletNumber() const;
-	int objectLocalIndex() const { return objectLocalDesignationCode() * 13 + objectLocalTripletNumber(); }
+	int objectLocalIndex() const;
 	void setObjectLocalDesignationCode(int i);
 	void setObjectLocalTripletNumber(int i);
 	void setObjectLocalIndex(int i);
 
-	int activePositionRow() const { return m_activePositionRow; }
+	int activePositionRow() const;
-	int activePositionColumn() const { return m_activePositionColumn; }
+	int activePositionColumn() const;
-	int activePositionRow1p5() const { return m_activePositionRow1p5; }
+	int activePositionRow1p5() const;
-	int activePositionColumn1p5() const { return m_activePositionColumn1p5; }
+	int activePositionColumn1p5() const;
-	X26TripletError error() const { return m_error; }
+	X26TripletError error() const;
-	bool reservedMode() const { return m_reservedMode; }
+	bool reservedMode() const;
-	bool reservedData() const { return m_reservedData; }
+	bool reservedData() const;
-	bool activePosition1p5Differs() const { return m_activePosition1p5Differs; }
+	bool activePosition1p5Differs() const;
 
 	friend class X26TripletList;
 
@@ -91,14 +93,13 @@ public:
 	void insert(int i, const X26Triplet &value);
 	void removeAt(int i);
 	void replace(int i, const X26Triplet &value);
+	void removeLast();
+	const X26Triplet &at(int i) const;
+	bool isEmpty() const;
+	void reserve(int alloc);
+	int size() const;
 
-	void removeLast() { m_list.removeLast(); }
+	const QList<int> &objects(int t) const;
-
-	const X26Triplet &at(int i) const { return m_list.at(i); }
-	bool isEmpty() const { return m_list.isEmpty(); }
-	void reserve(int alloc) { m_list.reserve(alloc); }
-	int size() const { return m_list.size(); }
-	const QList<int> &objects(int t) const { return m_objects[t]; };
 
 private:
 	void updateInternalData();
@@ -111,11 +112,9 @@ private:
 	public:
 		ActivePosition();
 		void reset();
-//		int row() const { return (m_row == -1) ? 0 : m_row; }
+		int row() const;
-//		int column() const { return (m_column == -1) ? 0 : m_column; }
+		int column() const;
-		int row() const { return m_row; }
+		bool isDeployed() const;
-		int column() const { return m_column; }
-		bool isDeployed() const { return m_row != -1; }
 		bool setRow(int);
 		bool setColumn(int);
 //		bool setRowAndColumn(int, int);

src/qteletextmaker/dclutdockwidget.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/dclutdockwidget.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/document.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/document.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/hashformats.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/hashformats.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/keymap.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/levelonecommands.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/levelonecommands.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/loadformats.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -139,11 +139,11 @@ bool LoadTTIFormat::load(QFile *inFile, QList<PageBase>& subPages, QVariantHash
 							fastTextPacket[i*6+2] = (fastTextLinkRead & 0x0f0) >> 4;
 							fastTextPacket[i*6+4] = 0x7 | ((fastTextLinkRead & 0x100) >> 5);
 							fastTextPacket[i*6+6] = 0x3 | ((fastTextLinkRead & 0x600) >> 7);
-
+						}
+					}
+				}
 				loadingPage->setPacket(27, 0, fastTextPacket);
-						}
+
-					}
-				}
 				if (metadata != nullptr)
 					metadata->insert(QString("fastextAbsolute"), true);
 			}
@@ -227,6 +227,9 @@ bool LoadT42Format::load(QFile *inFile, QList<PageBase>& subPages, QVariantHash
 	int foundPageNumber = -1;
 	bool firstPacket0Found = false;
 	bool pageBodyPacketsFound = false;
+	bool errorEnhancements = false;
+	bool errorLinks = false;
+	bool errorPresentation = false;
 
 	m_inFile = inFile;
 
@@ -374,6 +377,7 @@ bool LoadT42Format::load(QFile *inFile, QList<PageBase>& subPages, QVariantHash
 					// Error found in at least one byte of the link
 					// Neutralise the whole link to same magazine, page FF, subcode 3F7F
 					qDebug("X/27/%d link %d decoding error", readDesignationCode, i);
+					errorLinks = true;
 					m_inLine[b]   = 0xf;
 					m_inLine[b+1] = 0xf;
 					m_inLine[b+2] = 0xf;
@@ -416,15 +420,17 @@ bool LoadT42Format::load(QFile *inFile, QList<PageBase>& subPages, QVariantHash
 				// Error decoding Hamming 24/18
 				qDebug("X/%d/%d triplet %d decoding error", readPacketNumber, readDesignationCode, i);
 				if (readPacketNumber == 26) {
-					// Enhancements packet, set to "dummy" Address 41, Mode 0x1e, Data 0
+					// Enhancements packet, set to invalid triplet
-					m_inLine[b]   = 41;
+					m_inLine[b]   = 0xff;
-					m_inLine[b+1] = 0x1e;
+					m_inLine[b+1] = 0xff;
-					m_inLine[b+2] = 0;
+					m_inLine[b+2] = 0xff;
+					errorEnhancements = true;
 				} else {
 					// Zero out whole decoded triplet, bound to make things go wrong...
 					m_inLine[b]   = 0x00;
 					m_inLine[b+1] = 0x00;
 					m_inLine[b+2] = 0x00;
+					errorPresentation = true;
 				}
 			} else {
 				m_inLine[b]   = d & 0x0003f;
@@ -441,7 +447,14 @@ bool LoadT42Format::load(QFile *inFile, QList<PageBase>& subPages, QVariantHash
 	} else if (!pageBodyPacketsFound) {
 		m_error = "X/0 found, but no page body packets were found.";
 		return false;
-	} else
+	}
+
+	if (errorEnhancements)
+		m_warnings.append("Error decoding triplet(s) in enhancement data.");
+	if (errorLinks)
+		m_warnings.append("Error decoding FLOF links.");
+	if (errorPresentation)
+		m_warnings.append("Error decoding triplet(s) in presentation data.");
 	return true;
 }
 

src/qteletextmaker/loadformats.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/main.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -30,7 +30,7 @@ int main(int argc, char *argv[])
 	QApplication::setApplicationDisplayName(QApplication::applicationName());
 	QApplication::setOrganizationName("gkmac.co.uk");
 	QApplication::setOrganizationDomain("gkmac.co.uk");
-	QApplication::setApplicationVersion("0.8.1-beta");
+	QApplication::setApplicationVersion("0.8.2-beta");
 	QCommandLineParser parser;
 	parser.setApplicationDescription(QApplication::applicationName());
 	parser.addHelpOption();

src/qteletextmaker/mainwidget.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -539,6 +539,11 @@ void TeletextWidget::paste()
 	m_teletextDocument->undoStack()->push(new PasteCommand(m_teletextDocument, m_pageDecode.level1CharSet(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn())));
 }
 
+void TeletextWidget::selectAll()
+{
+	m_teletextDocument->setSelection((int)!m_teletextDocument->rowZeroAllowed(), 0, 24, 39);
+}
+
 QPair<int, int> TeletextWidget::mouseToRowAndColumn(const QPoint &mousePosition)
 {
 	int row = mousePosition.y() / 10;

src/qteletextmaker/mainwidget.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -82,6 +82,8 @@ public slots:
 	void copy();
 	void paste();
 
+	void selectAll();
+
 	void changeSize();
 
 protected:

src/qteletextmaker/mainwindow.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -191,6 +191,9 @@ void MainWindow::extractImages(QImage sceneImage[], bool smooth, bool flashExtra
 	// Prepare widget image for extraction
 	m_textScene->hideGUIElements(true);
 
+	if (m_textWidget->pageRender()->renderMode() == TeletextPageRender::RenderMix)
+		m_textScene->setBackgroundBrush(Qt::NoBrush);
+
 	const int flashTiming = flashExtract ? m_textWidget->flashTiming() : 0;
 
 	// Allocate initial image, with additional images for flashing if necessary
@@ -221,6 +224,9 @@ void MainWindow::extractImages(QImage sceneImage[], bool smooth, bool flashExtra
 		}
 
 	// Now we've extracted the image we can put the GUI things back
+	if (m_textWidget->pageRender()->renderMode() == TeletextPageRender::RenderMix)
+		m_textScene->setBackgroundBrush(QColor(40, 54, 96));
+
 	m_textScene->hideGUIElements(false);
 	m_textWidget->resumeFlash();
 
@@ -365,7 +371,7 @@ void MainWindow::about()
 	QMessageBox::about(this, tr("About"), QString("<b>%1</b><br>"
 	"An open source Level 2.5 teletext page editor.<br>"
 	"<i>Version %2</i><br><br>"
-	"Copyright (C) 2020-2025 Gavin MacGregor<br><br>"
+	"Copyright (C) 2020-2026 Gavin MacGregor<br><br>"
 	"Released under the GNU General Public License version 3<br>"
 	"<a href=\"https://github.com/gkthemac/qteletextmaker\">https://github.com/gkthemac/qteletextmaker</a>").arg(QApplication::applicationDisplayName()).arg(QApplication::applicationVersion()));
 }
@@ -637,6 +643,13 @@ void MainWindow::createActions()
 	editMenu->addAction(pasteAct);
 	editToolBar->addAction(pasteAct);
 
+	const QIcon selectAllIcon = QIcon::fromTheme("edit-select-all");
+	QAction *selectAllAct = new QAction(selectAllIcon, tr("Select &all"), this);
+	selectAllAct->setShortcut(QKeySequence(Qt::CTRL | Qt::Key_A));
+	selectAllAct->setStatusTip(tr("Select the whole subpage"));
+	connect(selectAllAct, &QAction::triggered, m_textWidget, &TeletextWidget::selectAll);
+	editMenu->addAction(selectAllAct);
+
 	QAction *copyImageAct = editMenu->addAction(tr("Copy as image"));
 	copyImageAct->setShortcut(QKeySequence(Qt::CTRL | Qt::SHIFT | Qt::Key_C));
 	copyImageAct->setStatusTip(tr("Copy this subpage as an image to the clipboard"));
@@ -824,16 +837,23 @@ void MainWindow::createActions()
 	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" };
+		const char *colourNames[] = { "Black", "Red", "Green", "Yellow", "Blue", "Magenta", "Cyan", "White" };
+		const QChar azertyKeys[] = { 'P', 'A', 'Z', 'E', 'R', 'T', 'Y', 'U' };
 
-		QAction *alphaColour = alphaColourSubMenu->addAction(tr(colours[i]));
+		QAction *alphaColour = alphaColourSubMenu->addAction(tr(colourNames[i]));
-		alphaColour->setShortcut(QKeySequence(QString("Esc, %1").arg(i)));
+		alphaColour->setShortcuts(QList<QKeySequence> {
-		alphaColour->setStatusTip(QString("Insert alphanumeric %1 attribute").arg(QString(colours[i]).toLower()));
+			QKeySequence(QString("Esc, %1").arg(i)),
+			QKeySequence(QString("Esc, %1").arg(azertyKeys[i]))
+		} );
+		alphaColour->setStatusTip(QString("Insert alphanumeric %1 attribute").arg(QString(colourNames[i]).toLower()));
 		connect(alphaColour, &QAction::triggered, [=]() { m_textWidget->setCharacter(i); });
 
-		QAction *mosaicColour = mosaicColourSubMenu->addAction(tr(colours[i]));
+		QAction *mosaicColour = mosaicColourSubMenu->addAction(tr(colourNames[i]));
-		mosaicColour->setShortcut(QKeySequence(QString("Esc, Shift+%1").arg(i)));
+		mosaicColour->setShortcuts(QList<QKeySequence> {
-		mosaicColour->setStatusTip(QString("Insert mosaic %1 attribute").arg(QString(colours[i]).toLower()));
+			QKeySequence(QString("Esc, Shift+%1").arg(i)),
+			QKeySequence(QString("Esc, Shift+%1").arg(azertyKeys[i]))
+		} );
+		mosaicColour->setStatusTip(QString("Insert mosaic %1 attribute").arg(QString(colourNames[i]).toLower()));
 		connect(mosaicColour, &QAction::triggered, [=]() { m_textWidget->setCharacter(i+0x10); });
 	}
 

src/qteletextmaker/mainwindow.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/pagecomposelinksdockwidget.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/pagecomposelinksdockwidget.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/pageenhancementsdockwidget.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/pageenhancementsdockwidget.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/pageoptionsdockwidget.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/pageoptionsdockwidget.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/palettedockwidget.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/palettedockwidget.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/saveformats.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -160,8 +160,23 @@ QByteArray SaveTTIFormat::format18BitPacket(QByteArray packet)
 	// TTI stores the triplets 6 bits at a time like we do, without Hamming encoding
 	// We don't touch the first byte; the caller replaces it with the designation code
 	// unless it's X/1-X/25 used in (G)POP pages
-	for (int i=1; i<packet.size(); i++)
+	for (int i=1; i<packet.size(); i++) {
+		// Save invalid triplets as address 41, mode 0x1e, data 0
+		// which hopefully won't do anything when parsed as X/26 enhancements
+		if ((packet.at(i) & 0xff) == 0xff)
+			switch (i % 3) {
+				case 1:
+					packet[i] = 41;
+					break;
+				case 2:
+					packet[i] = 0x1e;
+					break;
+				case 0:
+					packet[i] = 0;
+					break;
+			}
 		packet[i] = packet.at(i) | 0x40;
+	}
 
 	return packet;
 }
@@ -322,7 +337,11 @@ QByteArray SaveT42Format::format4BitPacket(QByteArray packet)
 
 QByteArray SaveT42Format::format18BitPacket(QByteArray packet)
 {
-	for (int c=1; c<packet.size(); c+=3) {
+	for (int c=1; c<packet.size(); c+=3)
+		// For invalid packets, save as all zeroes which will fail Hamming 24/18 decoding
+		if ((packet.at(c) & 0xff) == 0xff)
+			packet[c] = packet[c+1] = packet[c+2] = 0;
+		else {
 			unsigned int D5_D11;
 			unsigned int D12_D18;
 			unsigned int P5, P6;
@@ -440,7 +459,14 @@ bool SaveEP1Format::getWarnings(const PageBase &subPage)
 
 QByteArray SaveEP1Format::format18BitPacket(QByteArray packet)
 {
-	for (int c=1; c<packet.size(); c+=3) {
+	for (int c=1; c<packet.size(); c+=3)
+		if ((packet.at(c+1) & 0xff) == 0xff) {
+			// Save invalid triplets as address 41, mode 0x1e, data 0
+			// which hopefully won't do anything when parsed as X/26 enhancements
+			packet[c]   = 41;
+			packet[c+1] = 0x1e;
+			packet[c+2] = 0;
+		} else {
 			// Shuffle triplet bits to 6 bit address, 5 bit mode, 7 bit data
 			packet[c+2] = ((packet.at(c+2) & 0x3f) << 1) | ((packet.at(c+1) & 0x20) >> 5);
 			packet[c+1] = packet.at(c+1) & 0x1f;

src/qteletextmaker/saveformats.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/x26commands.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/x26commands.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/x26dockwidget.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -678,6 +678,13 @@ void X26DockWidget::updateAllCookedTripletWidgets(const QModelIndex &index)
 {
 	const int modeExt = index.model()->data(index.model()->index(index.row(), 2), Qt::EditRole).toInt();
 
+	if (modeExt == 0xff) {
+		disableTripletWidgets();
+		m_cookedModePushButton->setEnabled(true);
+		m_cookedModePushButton->setText("Replace...");
+		return;
+	}
+
 	m_cookedModePushButton->setEnabled(true);
 	m_cookedModePushButton->setText(m_modeTripletNames.modeName(modeExt));
 
@@ -1034,7 +1041,7 @@ void X26DockWidget::insertTriplet(int modeExt, int row)
 			if (modeExt >= 0x20 && modeExt != 0x24 && modeExt != 0x25 && modeExt != 0x26 && modeExt != 0x2a) {
 				const int existingTripletModeExt = index.model()->data(index.model()->index(index.row(), 2), Qt::EditRole).toInt();
 
-				if (existingTripletModeExt >= 0x20 && existingTripletModeExt != 0x24 && existingTripletModeExt != 0x25 && existingTripletModeExt != 0x26 && existingTripletModeExt != 0x2a)
+				if (existingTripletModeExt >= 0x20 && existingTripletModeExt <= 0x3f && existingTripletModeExt != 0x24 && existingTripletModeExt != 0x25 && existingTripletModeExt != 0x26 && existingTripletModeExt != 0x2a)
 					newTriplet.setAddress(index.model()->data(index.model()->index(index.row(), 0), Qt::UserRole).toInt());
 			}
 			// If we're inserting a Set Active Position or Full Row Colour triplet,
@@ -1059,11 +1066,15 @@ void X26DockWidget::insertTriplet(int modeExt, int row)
 	} else
 		row = 0;
 
-	// Avoid reserved bits
+	// Avoid reserved bits or suggest sane defaults
 	switch (modeExt) {
 		case 0x07: // Address Row 0
 			newTriplet.setAddress(63); // set Address to notreserved
 			break;
+		case 0x15: // Define Active Object
+		case 0x16: // Define Adaptive Object
+		case 0x17: // Define Passive Object
+			newTriplet.setAddress(0x38); // Required at Levels 2.5 and 3.5
 		case 0x18: // DRCS mode
 			newTriplet.setData(0x70); // Normal DRCS at Levels 2.5 and 3.5
 			break;

src/qteletextmaker/x26dockwidget.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/x26menus.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/x26menus.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/x26model.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -108,7 +108,7 @@ QVariant X26Model::data(const QModelIndex &index, int role) const
 				else
 					return QVariant();
 			case 1:
-				if (!triplet.isRowTriplet())
+				if (triplet.isValid() && !triplet.isRowTriplet())
 					return triplet.addressColumn();
 				// For Set Active Position and Origin Modifier, data is the column
 				else if (triplet.modeExt() == 0x04)
@@ -122,9 +122,14 @@ QVariant X26Model::data(const QModelIndex &index, int role) const
 	QString result;
 
 	if (role == Qt::DisplayRole) {
-		if (index.column() == 2)
+		if (index.column() == 2) {
+			if (!triplet.isValid())
+				return "Error decoding triplet";
 			return (m_modeTripletNames.modeName(triplet.modeExt()));
+		}
 		// Column 3 - describe effects of data/address triplet parameters in plain English
+		if (!triplet.isValid())
+			return QVariant();
 		switch (triplet.modeExt()) {
 			case 0x01: // Full row colour
 			case 0x07: // Address row 0
@@ -609,12 +614,15 @@ bool X26Model::setData(const QModelIndex &index, const QVariant &value, int role
 				return true;
 
 			case 2: // Cooked triplet mode
-				if (intValue < 0x20 && !triplet.isRowTriplet()) {
+				if (!triplet.isValid()) {
+					// Changing from invalid triplet
+					m_parentMainWidget->document()->undoStack()->push(new EditTripletCommand(m_parentMainWidget->document(), this, index.row(), EditTripletCommand::ETaddress, 0x00, intValue < 0x20 ? 41 : 0, role));
+					m_parentMainWidget->document()->undoStack()->push(new EditTripletCommand(m_parentMainWidget->document(), this, index.row(), EditTripletCommand::ETdata, 0x00, 32, role));
+				} else if (intValue < 0x20 && !triplet.isRowTriplet()) {
 					// Changing mode from column triplet to row triplet
 					m_parentMainWidget->document()->undoStack()->push(new EditTripletCommand(m_parentMainWidget->document(), this, index.row(), EditTripletCommand::ETaddress, 0x00, 41, role));
 					m_parentMainWidget->document()->undoStack()->push(new EditTripletCommand(m_parentMainWidget->document(), this, index.row(), EditTripletCommand::ETdata, 0x00, 0, role));
-				}
+				} else if (intValue >= 0x20 && triplet.isRowTriplet()) {
-				if (intValue >= 0x20 && triplet.isRowTriplet()) {
 					// Changing mode from row triplet to column triplet
 					m_parentMainWidget->document()->undoStack()->push(new EditTripletCommand(m_parentMainWidget->document(), this, index.row(), EditTripletCommand::ETaddress, 0x00, 0, role));
 					m_parentMainWidget->document()->undoStack()->push(new EditTripletCommand(m_parentMainWidget->document(), this, index.row(), EditTripletCommand::ETdata, 0x00, 0, role));

src/qteletextmaker/x26model.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -60,8 +60,9 @@ private:
 	};
 
 	// Needs to be in the same order as enum X26TripletError in x26triplets.h
-	const tripletErrorShow m_tripletErrors[6] {
+	const tripletErrorShow m_tripletErrors[7] {
 		{ "", 0 }, // No error
+		{ "Error decoding triplet", 2 },
 		{ "Active Position can't move up", 0 },
 		{ "Active Position can't move left within row", 1 },
 		{ "Invocation not pointing to Object Definition", 3 },

src/qteletextmaker/x28commands.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *

src/qteletextmaker/x28commands.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2025 Gavin MacGregor
+ * Copyright (C) 2020-2026 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *