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QTeletextMaker/mainwidget.cpp
G.K.MacGregor 021fbfa60f Rewrite the decoder 
A complete rewrite of decode.cpp and decode.h to make it easier to follow
and maintain. Rather than a set of "layers" descended from C++ classes, the
for-loop across the rows and columns explicitly lays out the order of
processing the Level 1 characters and attributes, the X/26 enhancements
that affect the page directly as well as those within each Invocation of an
Object, followed by selecting which Invoked Object to place in the character
cell or in the absence of an Object the underlying page fragment will be
placed in the cell.

The new decoder has the following improvements over the old...
- Local Enhancement Data has priority over Active Objects.
- Active Objects can set Full Screen and Full Row colours.
- Incremental/decremental flash phases are tracked correctly within Objects.
- X/26 characters overwriting the bottom half of Level 1 Double Height rows.
- Interaction between the underlying page and Objects where characters of
  different sizes overlap.
2023-05-07 19:25:06 +01:00

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/*
* Copyright (C) 2020-2023 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 <QBitmap>
#include <QClipboard>
#include <QFrame>
#include <QGraphicsItem>
#include <QGraphicsItemGroup>
#include <QGraphicsProxyWidget>
#include <QGraphicsScene>
#include <QGraphicsSceneEvent>
#include <QKeyEvent>
#include <QMenu>
#include <QMimeData>
#include <QPainter>
#include <QPair>
#include <QUndoCommand>
#include <QWidget>
#include <vector>
#include <iostream>
#include "mainwidget.h"
#include "decode.h"
#include "document.h"
#include "keymap.h"
#include "levelonecommands.h"
#include "levelonepage.h"
#include "render.h"
#include "x26triplets.h"
TeletextWidget::TeletextWidget(QFrame *parent) : QFrame(parent)
{
this->resize(QSize(480, 250));
this->setAttribute(Qt::WA_NoSystemBackground);
this->setAttribute(Qt::WA_InputMethodEnabled, true);
m_teletextDocument = new TeletextDocument();
m_levelOnePage = m_teletextDocument->currentSubPage();
m_pageDecode.setTeletextPage(m_levelOnePage);
m_pageRender.setDecoder(&m_pageDecode);
m_insertMode = false;
m_selectionInProgress = false;
setFocusPolicy(Qt::StrongFocus);
m_flashTiming = m_flashPhase = 0;
connect(&m_pageRender, &TeletextPageRender::flashChanged, this, &TeletextWidget::updateFlashTimer);
connect(&m_pageDecode, &TeletextPageDecode::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);
connect(m_teletextDocument, &TeletextDocument::colourChanged, &m_pageRender, &TeletextPageRender::colourChanged);
}
TeletextWidget::~TeletextWidget()
{
if (m_flashTimer.isActive())
m_flashTimer.stop();
delete m_teletextDocument;
}
// Re-implemented so compose/dead keys work properly
void TeletextWidget::inputMethodEvent(QInputMethodEvent* event)
{
if (!event->commitString().isEmpty()) {
QKeyEvent keyEvent(QEvent::KeyPress, 0, Qt::NoModifier, event->commitString());
keyPressEvent(&keyEvent);
}
event->accept();
}
void TeletextWidget::subPageSelected()
{
m_levelOnePage = m_teletextDocument->currentSubPage();
m_pageDecode.setTeletextPage(m_levelOnePage);
m_pageDecode.decodePage();
m_pageRender.renderPage(true);
update();
}
void TeletextWidget::refreshRow(int rowChanged)
{
Q_UNUSED(rowChanged);
// TODO trace signals where this is called so we can remove this
m_pageDecode.decodePage();
update();
}
void TeletextWidget::refreshPage()
{
m_pageDecode.decodePage();
update();
}
void TeletextWidget::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
QPainter widgetPainter(this);
m_pageRender.renderPage();
widgetPainter.drawPixmap(m_pageDecode.leftSidePanelColumns()*12, 0, *m_pageRender.pagePixmap(m_flashPhase), 0, 0, 480, 250);
if (m_pageDecode.leftSidePanelColumns())
widgetPainter.drawPixmap(0, 0, *m_pageRender.pagePixmap(m_flashPhase), 864-m_pageDecode.leftSidePanelColumns()*12, 0, m_pageDecode.leftSidePanelColumns()*12, 250);
if (m_pageDecode.rightSidePanelColumns())
widgetPainter.drawPixmap(480+m_pageDecode.leftSidePanelColumns()*12, 0, *m_pageRender.pagePixmap(m_flashPhase), 480, 0, m_pageDecode.rightSidePanelColumns()*12, 250);
}
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::pauseFlash(bool pauseNow)
{
if (pauseNow && m_flashTiming != 0) {
m_flashTimer.stop();
m_flashPhase = 0;
update();
} else if (m_flashTiming != 0)
m_flashTimer.start((m_flashTiming == 1) ? 500 : 167, this);
}
void TeletextWidget::setInsertMode(bool insertMode)
{
m_insertMode = insertMode;
}
void TeletextWidget::setReveal(bool reveal)
{
m_pageRender.setReveal(reveal);
update();
}
void TeletextWidget::setMix(bool mix)
{
m_pageRender.setMix(mix);
update();
}
void TeletextWidget::setShowControlCodes(bool showControlCodes)
{
m_pageRender.setShowControlCodes(showControlCodes);
update();
}
void TeletextWidget::setControlBit(int bitNumber, bool active)
{
m_levelOnePage->setControlBit(bitNumber, active);
if (bitNumber == 1 || bitNumber == 2) {
m_pageDecode.decodePage();
m_pageRender.renderPage(true);
}
}
void TeletextWidget::setDefaultCharSet(int newDefaultCharSet)
{
m_levelOnePage->setDefaultCharSet(newDefaultCharSet);
}
void TeletextWidget::setDefaultNOS(int newDefaultNOS)
{
m_levelOnePage->setDefaultNOS(newDefaultNOS);
}
void TeletextWidget::setDefaultScreenColour(int newColour)
{
m_levelOnePage->setDefaultScreenColour(newColour);
m_pageDecode.decodePage();
}
void TeletextWidget::setDefaultRowColour(int newColour)
{
m_levelOnePage->setDefaultRowColour(newColour);
m_pageDecode.decodePage();
update();
}
void TeletextWidget::setColourTableRemap(int newMap)
{
m_levelOnePage->setColourTableRemap(newMap);
m_pageDecode.decodePage();
update();
}
void TeletextWidget::setBlackBackgroundSubst(bool substOn)
{
m_levelOnePage->setBlackBackgroundSubst(substOn);
m_pageDecode.decodePage();
update();
}
void TeletextWidget::setSidePanelWidths(int newLeftSidePanelColumns, int newRightSidePanelColumns)
{
m_levelOnePage->setLeftSidePanelDisplayed(newLeftSidePanelColumns != 0);
m_levelOnePage->setRightSidePanelDisplayed(newRightSidePanelColumns != 0);
if (newLeftSidePanelColumns)
m_levelOnePage->setSidePanelColumns((newLeftSidePanelColumns == 16) ? 0 : newLeftSidePanelColumns);
else
m_levelOnePage->setSidePanelColumns((newRightSidePanelColumns == 0) ? 0 : 16-newRightSidePanelColumns);
m_pageDecode.updateSidePanels();
}
void TeletextWidget::setSidePanelAtL35Only(bool newSidePanelAtL35Only)
{
m_levelOnePage->setSidePanelStatusL25(!newSidePanelAtL35Only);
m_pageDecode.updateSidePanels();
}
void TeletextWidget::changeSize()
{
setFixedSize(QSize(480+(pageDecode()->leftSidePanelColumns()+pageDecode()->rightSidePanelColumns())*12, 250));
emit sizeChanged();
}
void TeletextWidget::keyPressEvent(QKeyEvent *event)
{
if (event->key() < 0x01000000) {
// A character-typing key was pressed
// Try to keymap it, if not keymapped then plain ASCII code (may be) returned
char mappedKeyPress = keymapping[m_pageDecode.level1CharSet(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn())].value(event->text().at(0), *qPrintable(event->text().at(0)));
if (mappedKeyPress >= 0x00 && mappedKeyPress <= 0x1f)
return;
// If outside ASCII map then the character can't be represented by current Level 1 character set
// Map it to block character so it doesn't need to be inserted-between later on
if (mappedKeyPress & 0x80)
mappedKeyPress = 0x7f;
if (m_pageDecode.level1MosaicAttribute(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn()) && (mappedKeyPress < 0x40 || mappedKeyPress > 0x5f)) {
// We're on a mosaic and a blast-through character was NOT pressed
if (event->key() >= Qt::Key_0 && event->key() <= Qt::Key_9 && event->modifiers() & Qt::KeypadModifier) {
switch (event->key()) {
case Qt::Key_7:
toggleCharacterBit(0x01); // Top left
break;
case Qt::Key_8:
toggleCharacterBit(0x02); // Top right
break;
case Qt::Key_4:
toggleCharacterBit(0x04); // Middle left
break;
case Qt::Key_5:
toggleCharacterBit(0x08); // Middle right
break;
case Qt::Key_1:
toggleCharacterBit(0x10); // Bottom left
break;
case Qt::Key_2:
toggleCharacterBit(0x40); // Bottom right
break;
case Qt::Key_9:
toggleCharacterBit(0x5f); // Invert
break;
case Qt::Key_6:
toggleCharacterBit(0x7f); // Set all
break;
case Qt::Key_3:
toggleCharacterBit(0x20); // Clear all
break;
case Qt::Key_0:
toggleCharacterBit(0x66); // Dither
break;
}
return;
}
if (event->key() == Qt::Key_Space) {
setCharacter(0x20);
return;
}
// This macro is defined in keymap.h if no native scan codes are defined
// for the platform we are compiling on
#ifndef QTTM_NONATIVESCANCODES
if (event->nativeScanCode() > 1) {
switch (event->nativeScanCode()) {
case mosaicNativeScanCodes[0]:
toggleCharacterBit(0x01); // Top left
break;
case mosaicNativeScanCodes[1]:
toggleCharacterBit(0x02); // Top right
break;
case mosaicNativeScanCodes[2]:
toggleCharacterBit(0x04); // Middle left
break;
case mosaicNativeScanCodes[3]:
toggleCharacterBit(0x08); // Middle right
break;
case mosaicNativeScanCodes[4]:
toggleCharacterBit(0x10); // Bottom left
break;
case mosaicNativeScanCodes[5]:
toggleCharacterBit(0x40); // Bottom right
break;
case mosaicNativeScanCodes[6]:
toggleCharacterBit(0x5f); // Invert
break;
case mosaicNativeScanCodes[7]:
toggleCharacterBit(0x7f); // Set all
break;
case mosaicNativeScanCodes[8]:
toggleCharacterBit(0x20); // Clear all
break;
case mosaicNativeScanCodes[9]:
toggleCharacterBit(0x66); // Dither
break;
}
return;
} else
qDebug("nativeScanCode not usable! Please use numeric keypad to toggle mosaic bits.");
#else
qDebug("nativeScanCode was not compiled in! Please use numeric keypad to toggle mosaic bits.");
#endif
// TODO some contingency plan if nativeScanCode didn't work?
return;
}
setCharacter(mappedKeyPress);
return;
}
switch (event->key()) {
case Qt::Key_Backspace:
m_teletextDocument->undoStack()->push(new BackspaceKeyCommand(m_teletextDocument, m_insertMode));
break;
case Qt::Key_Tab:
m_teletextDocument->undoStack()->push(new TypeCharacterCommand(m_teletextDocument, 0x20, true));
break;
case Qt::Key_Delete:
m_teletextDocument->undoStack()->push(new DeleteKeyCommand(m_teletextDocument));
break;
case Qt::Key_Insert:
emit insertKeyPressed();
break;
case Qt::Key_Up:
m_teletextDocument->cursorUp(event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_Down:
m_teletextDocument->cursorDown(event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_Left:
m_teletextDocument->cursorLeft(event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_Right:
m_teletextDocument->cursorRight(event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_Return:
case Qt::Key_Enter:
m_teletextDocument->cursorDown();
m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 0);
break;
case Qt::Key_Home:
m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 0, event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_End:
m_teletextDocument->moveCursor(m_teletextDocument->cursorRow(), 39, event->modifiers() & Qt::ShiftModifier);
break;
case Qt::Key_PageUp:
m_teletextDocument->selectSubPageNext();
break;
case Qt::Key_PageDown:
m_teletextDocument->selectSubPagePrevious();
break;
case Qt::Key_F6:
m_pageDecode.decodePage();
m_pageRender.renderPage(true);
update();
break;
default:
QFrame::keyPressEvent(event);
}
}
void TeletextWidget::setCharacter(unsigned char newCharacter)
{
m_teletextDocument->undoStack()->push(new TypeCharacterCommand(m_teletextDocument, newCharacter, m_insertMode));
}
void TeletextWidget::toggleCharacterBit(unsigned char bitToToggle)
{
m_teletextDocument->undoStack()->push(new ToggleMosaicBitCommand(m_teletextDocument, bitToToggle));
}
void TeletextWidget::selectionToClipboard()
{
QByteArray nativeData;
QString plainTextData;
QClipboard *clipboard = QApplication::clipboard();
nativeData.resize(2 + m_teletextDocument->selectionWidth() * m_teletextDocument->selectionHeight());
nativeData[0] = m_teletextDocument->selectionHeight();
nativeData[1] = m_teletextDocument->selectionWidth();
plainTextData.reserve((m_teletextDocument->selectionWidth()+1) * m_teletextDocument->selectionHeight() - 1);
int i=2;
for (int r=m_teletextDocument->selectionTopRow(); r<=m_teletextDocument->selectionBottomRow(); r++) {
for (int c=m_teletextDocument->selectionLeftColumn(); c<=m_teletextDocument->selectionRightColumn(); c++) {
nativeData[i++] = m_teletextDocument->currentSubPage()->character(r, c);
if (m_teletextDocument->currentSubPage()->character(r, c) >= 0x20)
plainTextData.append(keymapping[m_pageDecode.level1CharSet(r, c)].key(m_teletextDocument->currentSubPage()->character(r, c), m_teletextDocument->currentSubPage()->character(r, c)));
else
plainTextData.append(' ');
}
plainTextData.append('\n');
}
QMimeData *mimeData = new QMimeData();
mimeData->setData("application/x-teletext", nativeData);
mimeData->setText(plainTextData);
clipboard->setMimeData(mimeData);
}
void TeletextWidget::cut()
{
if (!m_teletextDocument->selectionActive())
return;
selectionToClipboard();
m_teletextDocument->undoStack()->push(new CutCommand(m_teletextDocument));
}
void TeletextWidget::copy()
{
if (!m_teletextDocument->selectionActive())
return;
selectionToClipboard();
}
void TeletextWidget::paste()
{
m_teletextDocument->undoStack()->push(new PasteCommand(m_teletextDocument, m_pageDecode.level1CharSet(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn())));
}
QPair<int, int> TeletextWidget::mouseToRowAndColumn(const QPoint &mousePosition)
{
int row = mousePosition.y() / 10;
int column = mousePosition.x() / 12 - m_pageDecode.leftSidePanelColumns();
if (row < 1)
row = 1;
if (row > 24)
row = 24;
if (column < 0)
column = 0;
if (column > 39)
column = 39;
return qMakePair(row, column);
}
void TeletextWidget::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
m_teletextDocument->cancelSelection();
QPair<int, int> position = mouseToRowAndColumn(event->pos());
m_teletextDocument->moveCursor(position.first, position.second);
update();
}
}
void TeletextWidget::mouseMoveEvent(QMouseEvent *event)
{
if (event->buttons() & Qt::LeftButton) {
QPair<int, int> position = mouseToRowAndColumn(event->pos());
if (position.first != m_teletextDocument->cursorRow() || position.second != m_teletextDocument->cursorColumn()) {
if (!m_selectionInProgress) {
m_selectionInProgress = true;
m_teletextDocument->setSelectionCorner(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn());
}
m_teletextDocument->moveCursor(position.first, position.second, true);
}
}
}
void TeletextWidget::mouseReleaseEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton)
m_selectionInProgress = false;
}
void TeletextWidget::focusInEvent(QFocusEvent *event)
{
QFrame::focusInEvent(event);
}
void TeletextWidget::focusOutEvent(QFocusEvent *event)
{
QFrame::focusOutEvent(event);
}
LevelOneScene::LevelOneScene(QWidget *levelOneWidget, QObject *parent) : QGraphicsScene(parent)
{
m_grid = false;
// These dimensions are scratch, setBorderDimensions will get called straight away to adjust them
setSceneRect(0, 0, 600, 288);
// Full screen colours
m_fullScreenTopRectItem = new QGraphicsRectItem(0, 0, 600, 19);
m_fullScreenTopRectItem->setPen(Qt::NoPen);
m_fullScreenTopRectItem->setBrush(QBrush(QColor(0, 0, 0)));
addItem(m_fullScreenTopRectItem);
m_fullScreenBottomRectItem = new QGraphicsRectItem(0, 269, 600, 19);
m_fullScreenBottomRectItem->setPen(Qt::NoPen);
m_fullScreenBottomRectItem->setBrush(QBrush(QColor(0, 0, 0)));
addItem(m_fullScreenBottomRectItem);
// Full row colours
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)));
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)));
addItem(m_fullRowRightRectItem[r]);
}
// Main text widget
m_levelOneProxyWidget = addWidget(levelOneWidget);
m_levelOneProxyWidget->setPos(60, 19);
m_levelOneProxyWidget->setAutoFillBackground(false);
m_levelOneProxyWidget->setFocus();
// Selection
m_selectionRectItem = new QGraphicsRectItem(0, 0, 12, 10);
m_selectionRectItem->setVisible(false);
m_selectionRectItem->setPen(QPen(QColor(192, 192, 192), 1, Qt::DashLine));
m_selectionRectItem->setBrush(QBrush(QColor(255, 255, 255, 64)));
addItem(m_selectionRectItem);
// Cursor
m_cursorRectItem = new QGraphicsRectItem(0, 0, 12, 10);
m_cursorRectItem->setPen(Qt::NoPen);
m_cursorRectItem->setBrush(QBrush(QColor(128, 128, 128, 192)));
addItem(m_cursorRectItem);
// Optional grid overlay for text widget
m_mainGridItemGroup = new QGraphicsItemGroup;
m_mainGridItemGroup->setVisible(false);
addItem(m_mainGridItemGroup);
// Additional vertical pieces of grid for side panels
for (int i=0; i<32; i++) {
m_sidePanelGridNeeded[i] = false;
m_sidePanelGridItemGroup[i] = new QGraphicsItemGroup;
m_sidePanelGridItemGroup[i]->setVisible(false);
addItem(m_sidePanelGridItemGroup[i]);
}
for (int r=1; r<25; r++) {
for (int c=0; c<40; c++) {
QGraphicsRectItem *gridPiece = new QGraphicsRectItem(c*12, r*10, 12, 10);
gridPiece->setPen(QPen(QBrush(QColor(128, 128, 128, r<24 ? 192 : 128)), 0));
m_mainGridItemGroup->addToGroup(gridPiece);
}
if (r < 24)
for (int c=0; c<32; c++) {
QGraphicsRectItem *gridPiece = new QGraphicsRectItem(0, r*10, 12, 10);
gridPiece->setPen(QPen(QBrush(QColor(128, 128, 128, 64)), 0));
m_sidePanelGridItemGroup[c]->addToGroup(gridPiece);
}
}
installEventFilter(this);
}
void LevelOneScene::setBorderDimensions(int sceneWidth, int sceneHeight, int widgetWidth, int leftSidePanelColumns, int rightSidePanelColumns)
{
setSceneRect(0, 0, sceneWidth, sceneHeight);
// Assume text widget height is always 250
int topBottomBorders = (sceneHeight-250) / 2;
// Ideally we'd use m_levelOneProxyWidget->size() to discover the widget width ourselves
// but this causes a stubborn segfault, so we have to receive the widgetWidth as a parameter
int leftRightBorders = (sceneWidth-widgetWidth) / 2;
m_levelOneProxyWidget->setPos(leftRightBorders, topBottomBorders);
// Position grid to cover central 40 columns
m_mainGridItemGroup->setPos(leftRightBorders + leftSidePanelColumns*12, topBottomBorders);
updateCursor();
updateSelection();
// Grid for right side panel
for (int c=0; c<16; c++)
if (rightSidePanelColumns > c) {
m_sidePanelGridItemGroup[c]->setPos(leftRightBorders + leftSidePanelColumns*12 + 480 + c*12, topBottomBorders);
m_sidePanelGridItemGroup[c]->setVisible(m_grid);
m_sidePanelGridNeeded[c] = true;
} else {
m_sidePanelGridItemGroup[c]->setVisible(false);
m_sidePanelGridNeeded[c] = false;
}
// Grid for left side panel
for (int c=0; c<16; c++)
if (c < leftSidePanelColumns) {
m_sidePanelGridItemGroup[31-c]->setPos(leftRightBorders + (leftSidePanelColumns-c-1)*12, topBottomBorders);
m_sidePanelGridItemGroup[31-c]->setVisible(m_grid);
m_sidePanelGridNeeded[31-c] = true;
} else {
m_sidePanelGridItemGroup[31-c]->setVisible(false);
m_sidePanelGridNeeded[31-c] = false;
}
// Full screen colours
m_fullScreenTopRectItem->setRect(0, 0, sceneWidth, topBottomBorders);
m_fullScreenBottomRectItem->setRect(0, 250+topBottomBorders, sceneWidth, topBottomBorders);
// Full row colours
for (int r=0; r<25; r++) {
m_fullRowLeftRectItem[r]->setRect(0, topBottomBorders+r*10, leftRightBorders+1, 10);
m_fullRowRightRectItem[r]->setRect(sceneWidth-leftRightBorders-1, topBottomBorders+r*10, leftRightBorders+1, 10);
}
}
void LevelOneScene::updateCursor()
{
m_cursorRectItem->setPos(m_mainGridItemGroup->pos().x() + static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->document()->cursorColumn()*12, m_mainGridItemGroup->pos().y() + static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->document()->cursorRow()*10);
}
void LevelOneScene::updateSelection()
{
if (!static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->document()->selectionActive()) {
m_selectionRectItem->setVisible(false);
return;
}
m_selectionRectItem->setRect(m_mainGridItemGroup->pos().x() + static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->document()->selectionLeftColumn()*12, m_mainGridItemGroup->pos().y() + static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->document()->selectionTopRow()*10, static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->document()->selectionWidth()*12-1, static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->document()->selectionHeight()*10-1);
m_selectionRectItem->setVisible(true);
}
void LevelOneScene::setMix(bool mix)
{
if (mix) {
m_fullScreenTopRectItem->setBrush(Qt::transparent);
m_fullScreenBottomRectItem->setBrush(Qt::transparent);
for (int r=0; r<25; r++) {
m_fullRowLeftRectItem[r]->setBrush(Qt::transparent);
m_fullRowRightRectItem[r]->setBrush(Qt::transparent);
}
} else {
setFullScreenColour(static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->pageDecode()->fullScreenQColor());
for (int r=0; r<25; r++)
setFullRowColour(r, static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->pageDecode()->fullRowQColor(r));
}
}
void LevelOneScene::toggleGrid(bool gridOn)
{
m_grid = gridOn;
m_mainGridItemGroup->setVisible(gridOn);
for (int i=0; i<32; i++)
if (m_sidePanelGridNeeded[i])
m_sidePanelGridItemGroup[i]->setVisible(gridOn);
}
void LevelOneScene::hideGUIElements(bool hidden)
{
if (hidden) {
m_cursorRectItem->setVisible(false);
m_selectionRectItem->setVisible(false);
} else {
if (static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->document()->selectionActive())
m_selectionRectItem->setVisible(true);
m_cursorRectItem->setVisible(true);
}
}
// Implements Ctrl+mousewheel zoom
bool LevelOneScene::eventFilter(QObject *object, QEvent *event)
{
Q_UNUSED(object);
if (event->type() == QEvent::GraphicsSceneWheel && static_cast<QGraphicsSceneWheelEvent *>(event)->modifiers() == Qt::ControlModifier) {
if (static_cast<QGraphicsSceneWheelEvent *>(event)->delta() > 0)
emit mouseZoomIn();
else if (static_cast<QGraphicsSceneWheelEvent *>(event)->delta() < 0)
emit mouseZoomOut();
event->accept();
return true;
}
return false;
}
// Clicking outside the main text widget but still within the scene would
// cause keyboard focus loss.
// So on every keypress within the scene, wrench the focus back to the widget
// if necessary.
void LevelOneScene::keyPressEvent(QKeyEvent *keyEvent)
{
if (focusItem() != m_levelOneProxyWidget)
setFocusItem(m_levelOneProxyWidget);
QGraphicsScene::keyPressEvent(keyEvent);
}
void LevelOneScene::keyReleaseEvent(QKeyEvent *keyEvent)
{
if (focusItem() != m_levelOneProxyWidget)
setFocusItem(m_levelOneProxyWidget);
QGraphicsScene::keyReleaseEvent(keyEvent);
}
void LevelOneScene::setFullScreenColour(const QColor &newColor)
{
if (!static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->pageRender()->mix()) {
m_fullScreenTopRectItem->setBrush(newColor);
m_fullScreenBottomRectItem->setBrush(newColor);
}
}
void LevelOneScene::setFullRowColour(int row, const QColor &newColor)
{
if (!static_cast<TeletextWidget *>(m_levelOneProxyWidget->widget())->pageRender()->mix()) {
m_fullRowLeftRectItem[row]->setBrush(newColor);
m_fullRowRightRectItem[row]->setBrush(newColor);
}
}
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