Implement DRCS rendering
External pages with DRCS definitions can be loaded using the options in the "DRCS pages" submenu within the "View" menu. Two DRCS pages can be loaded, one for Global DRCS definitions and the other for Normal DRCS definitions. Level 2.5 mode 0 PTUs are fully supported. Partial support for Level 3.5 mode 1, 2 and 3 PTUs. DCLUTs defined in X/28/1 on the main page are not yet implemented; the characters currently appear in the default DCLUTs described in D.1.6 and D.2.2 of the ETSI spec.
This commit is contained in:
Gavin MacGregor
@@ -21,6 +21,7 @@
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#include <QApplication>
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#include <QDesktopServices>
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#include <QFileDialog>
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#include <QFileSystemWatcher>
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#include <QImage>
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#include <QList>
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#include <QMenuBar>
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@@ -42,6 +43,7 @@
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#include "mainwindow.h"
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#include "drcspage.h"
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#include "hashformats.h"
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#include "levelonecommands.h"
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#include "loadformats.h"
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@@ -378,6 +380,8 @@ void MainWindow::init()
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connect(m_textScene, &LevelOneScene::mouseZoomIn, this, &MainWindow::zoomIn);
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connect(m_textScene, &LevelOneScene::mouseZoomOut, this, &MainWindow::zoomOut);
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connect(&m_fileWatcher, &QFileSystemWatcher::fileChanged, this, &MainWindow::updateWatchedFile);
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QShortcut *blockShortCut = new QShortcut(QKeySequence(Qt::Key_Escape, Qt::Key_J), m_textView);
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connect(blockShortCut, &QShortcut::activated, [=]() { m_textWidget->setCharacter(0x7f); });
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@@ -678,6 +682,35 @@ void MainWindow::createActions()
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zoomResetAct->setStatusTip(tr("Reset zoom level"));
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connect(zoomResetAct, &QAction::triggered, this, &MainWindow::zoomReset);
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viewMenu->addSeparator();
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QMenu *drcsSubMenu = viewMenu->addMenu(tr("DRCS pages"));
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m_drcsSeparator[1] = drcsSubMenu->addSeparator();
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m_drcsSeparator[1]->setText("Global DRCS");
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QAction *gDrcsFileSelect = drcsSubMenu->addAction(tr("Load file..."));
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gDrcsFileSelect->setStatusTip(tr("Load a file to use for Global DRCS definitions"));
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connect(gDrcsFileSelect, &QAction::triggered, [=]() { loadDRCSFile(1); });
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m_drcsClear[1] = drcsSubMenu->addAction(tr("Clear"));
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m_drcsClear[1]->setStatusTip(tr("Clear Global DRCS definitions"));
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m_drcsClear[1]->setEnabled(false);
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connect(m_drcsClear[1], &QAction::triggered, [=]() { clearDRCSFile(1); });
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m_drcsSeparator[0] = drcsSubMenu->addSeparator();
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m_drcsSeparator[0]->setText("Normal DRCS");
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QAction *nDrcsFileSelect = drcsSubMenu->addAction(tr("Load file..."));
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nDrcsFileSelect->setStatusTip(tr("Load a file to use for Normal DRCS definitions"));
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connect(nDrcsFileSelect, &QAction::triggered, [=]() { loadDRCSFile(0); });
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m_drcsClear[0] = drcsSubMenu->addAction(tr("Clear"));
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m_drcsClear[0]->setStatusTip(tr("Clear Normal DRCS definitions"));
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m_drcsClear[0]->setEnabled(false);
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connect(m_drcsClear[0], &QAction::triggered, [=]() { clearDRCSFile(0); });
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drcsSubMenu->addSeparator();
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m_drcsSwap = drcsSubMenu->addAction(tr("Swap Global and Normal"));
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m_drcsSwap->setStatusTip(tr("Swap the files used for Global and Normal DRCS definitions"));
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m_drcsSwap->setEnabled(false);
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connect(m_drcsSwap, &QAction::triggered, this, &MainWindow::swapDRCS);
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QMenu *insertMenu = menuBar()->addMenu(tr("&Insert"));
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QMenu *alphaColourSubMenu = insertMenu->addMenu(tr("Alphanumeric colour"));
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@@ -900,6 +933,119 @@ void MainWindow::zoomReset()
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m_zoomSlider->setValue(2);
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}
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void MainWindow::loadDRCSFile(int drcsType, QString fileName)
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{
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const QString drcsTypeName = drcsType == 1 ? "Global DRCS" : "Normal DRCS";
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const bool updatingWatched = !fileName.isEmpty();
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if (!updatingWatched)
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fileName = QFileDialog::getOpenFileName(this, tr("Select %1 file").arg(drcsTypeName), m_drcsFileName[drcsType], m_loadFormats.filters());
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if (!fileName.isEmpty()) {
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QFile file(fileName);
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LoadFormat *loadingFormat = m_loadFormats.findFormat(QFileInfo(fileName).suffix());
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if (loadingFormat == nullptr) {
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if (updatingWatched)
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clearDRCSFile(drcsType);
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else
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QMessageBox::warning(this, QApplication::applicationDisplayName(), tr("Cannot load file %1:\nUnknown file format or extension").arg(QDir::toNativeSeparators(fileName)));
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return;
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}
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if (!file.open(QFile::ReadOnly)) {
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if (updatingWatched)
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clearDRCSFile(drcsType);
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else
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QMessageBox::warning(this, QApplication::applicationDisplayName(), tr("Cannot read file %1:\n%2.").arg(QDir::toNativeSeparators(fileName), file.errorString()));
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return;
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}
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QList<PageBase> loadedPages;
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if (loadingFormat->load(&file, loadedPages, nullptr)) {
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if (!m_drcsFileName[drcsType].isEmpty())
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m_fileWatcher.removePath(m_drcsFileName[drcsType]);
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m_textWidget->pageDecode()->clearDRCSPage((TeletextPageDecode::DRCSPageType)drcsType);
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m_drcsPage[drcsType].clear();
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for (int i=0; i<loadedPages.size(); i++)
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m_drcsPage[drcsType].append(loadedPages.at(i));
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m_textWidget->pageDecode()->setDRCSPage((TeletextPageDecode::DRCSPageType)drcsType, &m_drcsPage[drcsType]);
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m_textWidget->refreshPage();
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m_fileWatcher.addPath(fileName);
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m_drcsFileName[drcsType] = fileName;
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m_drcsSeparator[drcsType]->setText(QString("%1: %2").arg(drcsTypeName).arg(QFileInfo(fileName).fileName()));
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m_drcsClear[drcsType]->setEnabled(true);
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m_drcsSwap->setEnabled(true);
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} else {
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if (updatingWatched)
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clearDRCSFile(drcsType);
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else
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QMessageBox::warning(this, QApplication::applicationDisplayName(), tr("Cannot load file %1\n%2").arg(QDir::toNativeSeparators(fileName), loadingFormat->errorString()));
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return;
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}
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}
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}
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void MainWindow::clearDRCSFile(int drcsType)
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{
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m_fileWatcher.removePath(m_drcsFileName[drcsType]);
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m_textWidget->pageDecode()->clearDRCSPage((TeletextPageDecode::DRCSPageType)drcsType);
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m_drcsPage[drcsType].clear();
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m_textWidget->refreshPage();
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m_drcsFileName[drcsType].clear();
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m_drcsSeparator[drcsType]->setText(drcsType == 1 ? "Global DRCS" : "Normal DRCS");
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m_drcsClear[drcsType]->setEnabled(false);
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m_drcsSwap->setEnabled(m_drcsClear[0]->isEnabled() || m_drcsClear[1]->isEnabled());
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}
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void MainWindow::swapDRCS()
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{
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m_drcsPage[0].swap(m_drcsPage[1]);
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m_drcsFileName[0].swap(m_drcsFileName[1]);
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for (int i=0; i<2; i++) {
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const QString drcsTypeName = i == 1 ? "Global DRCS" : "Normal DRCS";
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if (m_drcsPage[i].isEmpty()) {
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m_textWidget->pageDecode()->clearDRCSPage((TeletextPageDecode::DRCSPageType)i);
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m_drcsSeparator[i]->setText(drcsTypeName);
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} else {
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m_textWidget->pageDecode()->setDRCSPage((TeletextPageDecode::DRCSPageType)i, &m_drcsPage[i]);
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m_drcsSeparator[i]->setText(QString("%1: %2").arg(drcsTypeName).arg(QFileInfo(m_drcsFileName[i]).fileName()));
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}
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m_drcsClear[i]->setEnabled(!m_drcsPage[i].isEmpty());
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}
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m_textWidget->refreshPage();
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}
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void MainWindow::updateWatchedFile(const QString &path)
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{
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int drcsType;
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if (path == m_drcsFileName[1])
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drcsType = 1;
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else if (path == m_drcsFileName[0])
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drcsType = 0;
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else
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return;
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loadDRCSFile(drcsType, path);
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}
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void MainWindow::toggleInsertMode()
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{
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m_textWidget->setInsertMode(!m_textWidget->insertMode());
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