mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-30 07:46:51 +08:00
464 lines
15 KiB
C++
464 lines
15 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include <QtWidgets>
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#include "mainwindow.h"
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#include "mdichild.h"
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MainWindow::MainWindow()
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: mdiArea(new QMdiArea)
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{
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mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
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mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
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setCentralWidget(mdiArea);
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connect(mdiArea, &QMdiArea::subWindowActivated,
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this, &MainWindow::updateMenus);
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createActions();
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createStatusBar();
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updateMenus();
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readSettings();
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setWindowTitle(tr("MDI"));
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setUnifiedTitleAndToolBarOnMac(true);
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}
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void MainWindow::closeEvent(QCloseEvent *event)
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{
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mdiArea->closeAllSubWindows();
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if (mdiArea->currentSubWindow()) {
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event->ignore();
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} else {
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writeSettings();
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event->accept();
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}
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}
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void MainWindow::newFile()
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{
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MdiChild *child = createMdiChild();
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child->newFile();
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child->show();
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}
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void MainWindow::open()
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{
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const QString fileName = QFileDialog::getOpenFileName(this);
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if (!fileName.isEmpty())
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openFile(fileName);
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}
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bool MainWindow::openFile(const QString &fileName)
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{
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if (QMdiSubWindow *existing = findMdiChild(fileName)) {
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mdiArea->setActiveSubWindow(existing);
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return true;
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}
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const bool succeeded = loadFile(fileName);
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if (succeeded)
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statusBar()->showMessage(tr("File loaded"), 2000);
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return succeeded;
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}
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bool MainWindow::loadFile(const QString &fileName)
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{
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MdiChild *child = createMdiChild();
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const bool succeeded = child->loadFile(fileName);
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if (succeeded)
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child->show();
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else
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child->close();
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MainWindow::prependToRecentFiles(fileName);
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return succeeded;
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}
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static inline QString recentFilesKey() { return QStringLiteral("recentFileList"); }
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static inline QString fileKey() { return QStringLiteral("file"); }
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static QStringList readRecentFiles(QSettings &settings)
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{
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QStringList result;
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const int count = settings.beginReadArray(recentFilesKey());
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for (int i = 0; i < count; ++i) {
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settings.setArrayIndex(i);
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result.append(settings.value(fileKey()).toString());
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}
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settings.endArray();
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return result;
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}
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static void writeRecentFiles(const QStringList &files, QSettings &settings)
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{
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const int count = files.size();
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settings.beginWriteArray(recentFilesKey());
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for (int i = 0; i < count; ++i) {
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settings.setArrayIndex(i);
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settings.setValue(fileKey(), files.at(i));
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}
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settings.endArray();
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}
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bool MainWindow::hasRecentFiles()
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{
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QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
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const int count = settings.beginReadArray(recentFilesKey());
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settings.endArray();
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return count > 0;
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}
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void MainWindow::prependToRecentFiles(const QString &fileName)
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{
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QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
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const QStringList oldRecentFiles = readRecentFiles(settings);
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QStringList recentFiles = oldRecentFiles;
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recentFiles.removeAll(fileName);
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recentFiles.prepend(fileName);
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if (oldRecentFiles != recentFiles)
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writeRecentFiles(recentFiles, settings);
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setRecentFilesVisible(!recentFiles.isEmpty());
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}
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void MainWindow::setRecentFilesVisible(bool visible)
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{
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recentFileSubMenuAct->setVisible(visible);
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recentFileSeparator->setVisible(visible);
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}
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void MainWindow::updateRecentFileActions()
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{
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QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
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const QStringList recentFiles = readRecentFiles(settings);
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const int count = qMin(int(MaxRecentFiles), recentFiles.size());
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int i = 0;
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for ( ; i < count; ++i) {
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const QString fileName = QFileInfo(recentFiles.at(i)).fileName();
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recentFileActs[i]->setText(tr("&%1 %2").arg(i + 1).arg(fileName));
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recentFileActs[i]->setData(recentFiles.at(i));
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recentFileActs[i]->setVisible(true);
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}
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for ( ; i < MaxRecentFiles; ++i)
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recentFileActs[i]->setVisible(false);
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}
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void MainWindow::openRecentFile()
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{
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if (const QAction *action = qobject_cast<const QAction *>(sender()))
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openFile(action->data().toString());
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}
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void MainWindow::save()
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{
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if (activeMdiChild() && activeMdiChild()->save())
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statusBar()->showMessage(tr("File saved"), 2000);
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}
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void MainWindow::saveAs()
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{
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MdiChild *child = activeMdiChild();
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if (child && child->saveAs()) {
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statusBar()->showMessage(tr("File saved"), 2000);
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MainWindow::prependToRecentFiles(child->currentFile());
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}
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}
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#ifndef QT_NO_CLIPBOARD
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void MainWindow::cut()
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{
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if (activeMdiChild())
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activeMdiChild()->cut();
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}
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void MainWindow::copy()
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{
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if (activeMdiChild())
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activeMdiChild()->copy();
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}
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void MainWindow::paste()
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{
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if (activeMdiChild())
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activeMdiChild()->paste();
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}
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#endif
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void MainWindow::about()
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{
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QMessageBox::about(this, tr("About MDI"),
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tr("The <b>MDI</b> example demonstrates how to write multiple "
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"document interface applications using Qt."));
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}
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void MainWindow::updateMenus()
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{
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bool hasMdiChild = (activeMdiChild() != nullptr);
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saveAct->setEnabled(hasMdiChild);
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saveAsAct->setEnabled(hasMdiChild);
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#ifndef QT_NO_CLIPBOARD
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pasteAct->setEnabled(hasMdiChild);
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#endif
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closeAct->setEnabled(hasMdiChild);
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closeAllAct->setEnabled(hasMdiChild);
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tileAct->setEnabled(hasMdiChild);
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cascadeAct->setEnabled(hasMdiChild);
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nextAct->setEnabled(hasMdiChild);
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previousAct->setEnabled(hasMdiChild);
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windowMenuSeparatorAct->setVisible(hasMdiChild);
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#ifndef QT_NO_CLIPBOARD
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bool hasSelection = (activeMdiChild() &&
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activeMdiChild()->textCursor().hasSelection());
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cutAct->setEnabled(hasSelection);
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copyAct->setEnabled(hasSelection);
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#endif
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}
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void MainWindow::updateWindowMenu()
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{
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windowMenu->clear();
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windowMenu->addAction(closeAct);
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windowMenu->addAction(closeAllAct);
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windowMenu->addSeparator();
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windowMenu->addAction(tileAct);
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windowMenu->addAction(cascadeAct);
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windowMenu->addSeparator();
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windowMenu->addAction(nextAct);
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windowMenu->addAction(previousAct);
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windowMenu->addAction(windowMenuSeparatorAct);
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QList<QMdiSubWindow *> windows = mdiArea->subWindowList();
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windowMenuSeparatorAct->setVisible(!windows.isEmpty());
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for (int i = 0; i < windows.size(); ++i) {
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QMdiSubWindow *mdiSubWindow = windows.at(i);
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MdiChild *child = qobject_cast<MdiChild *>(mdiSubWindow->widget());
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QString text;
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if (i < 9) {
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text = tr("&%1 %2").arg(i + 1)
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.arg(child->userFriendlyCurrentFile());
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} else {
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text = tr("%1 %2").arg(i + 1)
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.arg(child->userFriendlyCurrentFile());
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}
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QAction *action = windowMenu->addAction(text, mdiSubWindow, [this, mdiSubWindow]() {
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mdiArea->setActiveSubWindow(mdiSubWindow);
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});
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action->setCheckable(true);
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action ->setChecked(child == activeMdiChild());
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}
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}
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MdiChild *MainWindow::createMdiChild()
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{
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MdiChild *child = new MdiChild;
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mdiArea->addSubWindow(child);
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#ifndef QT_NO_CLIPBOARD
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connect(child, &QTextEdit::copyAvailable, cutAct, &QAction::setEnabled);
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connect(child, &QTextEdit::copyAvailable, copyAct, &QAction::setEnabled);
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#endif
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return child;
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}
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void MainWindow::createActions()
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{
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QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
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QToolBar *fileToolBar = addToolBar(tr("File"));
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const QIcon newIcon = QIcon::fromTheme("document-new", QIcon(":/images/new.png"));
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newAct = new QAction(newIcon, tr("&New"), this);
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newAct->setShortcuts(QKeySequence::New);
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newAct->setStatusTip(tr("Create a new file"));
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connect(newAct, &QAction::triggered, this, &MainWindow::newFile);
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fileMenu->addAction(newAct);
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fileToolBar->addAction(newAct);
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//! [qaction setup]
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const QIcon openIcon = QIcon::fromTheme("document-open", QIcon(":/images/open.png"));
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QAction *openAct = new QAction(openIcon, tr("&Open..."), this);
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openAct->setShortcuts(QKeySequence::Open);
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openAct->setStatusTip(tr("Open an existing file"));
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connect(openAct, &QAction::triggered, this, &MainWindow::open);
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fileMenu->addAction(openAct);
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fileToolBar->addAction(openAct);
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//! [qaction setup]
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const QIcon saveIcon = QIcon::fromTheme("document-save", QIcon(":/images/save.png"));
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saveAct = new QAction(saveIcon, tr("&Save"), this);
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saveAct->setShortcuts(QKeySequence::Save);
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saveAct->setStatusTip(tr("Save the document to disk"));
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connect(saveAct, &QAction::triggered, this, &MainWindow::save);
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fileToolBar->addAction(saveAct);
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const QIcon saveAsIcon = QIcon::fromTheme("document-save-as");
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saveAsAct = new QAction(saveAsIcon, tr("Save &As..."), this);
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saveAsAct->setShortcuts(QKeySequence::SaveAs);
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saveAsAct->setStatusTip(tr("Save the document under a new name"));
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connect(saveAsAct, &QAction::triggered, this, &MainWindow::saveAs);
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fileMenu->addAction(saveAsAct);
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fileMenu->addSeparator();
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QMenu *recentMenu = fileMenu->addMenu(tr("Recent..."));
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connect(recentMenu, &QMenu::aboutToShow, this, &MainWindow::updateRecentFileActions);
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recentFileSubMenuAct = recentMenu->menuAction();
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for (int i = 0; i < MaxRecentFiles; ++i) {
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recentFileActs[i] = recentMenu->addAction(QString(), this, &MainWindow::openRecentFile);
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recentFileActs[i]->setVisible(false);
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}
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recentFileSeparator = fileMenu->addSeparator();
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setRecentFilesVisible(MainWindow::hasRecentFiles());
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fileMenu->addAction(tr("Switch layout direction"), this, &MainWindow::switchLayoutDirection);
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fileMenu->addSeparator();
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//! [0]
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const QIcon exitIcon = QIcon::fromTheme("application-exit");
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QAction *exitAct = fileMenu->addAction(exitIcon, tr("E&xit"), qApp, &QApplication::quit);
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exitAct->setShortcuts(QKeySequence::Quit);
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exitAct->setStatusTip(tr("Exit the application"));
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fileMenu->addAction(exitAct);
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//! [0]
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#ifndef QT_NO_CLIPBOARD
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QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
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QToolBar *editToolBar = addToolBar(tr("Edit"));
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const QIcon cutIcon = QIcon::fromTheme("edit-cut", QIcon(":/images/cut.png"));
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cutAct = new QAction(cutIcon, tr("Cu&t"), this);
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cutAct->setShortcuts(QKeySequence::Cut);
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cutAct->setStatusTip(tr("Cut the current selection's contents to the "
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"clipboard"));
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connect(cutAct, &QAction::triggered, this, &MainWindow::cut);
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editMenu->addAction(cutAct);
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editToolBar->addAction(cutAct);
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const QIcon copyIcon = QIcon::fromTheme("edit-copy", QIcon(":/images/copy.png"));
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copyAct = new QAction(copyIcon, tr("&Copy"), this);
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copyAct->setShortcuts(QKeySequence::Copy);
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copyAct->setStatusTip(tr("Copy the current selection's contents to the "
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"clipboard"));
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connect(copyAct, &QAction::triggered, this, &MainWindow::copy);
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editMenu->addAction(copyAct);
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editToolBar->addAction(copyAct);
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const QIcon pasteIcon = QIcon::fromTheme("edit-paste", QIcon(":/images/paste.png"));
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pasteAct = new QAction(pasteIcon, tr("&Paste"), this);
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pasteAct->setShortcuts(QKeySequence::Paste);
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pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
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"selection"));
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connect(pasteAct, &QAction::triggered, this, &MainWindow::paste);
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editMenu->addAction(pasteAct);
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editToolBar->addAction(pasteAct);
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#endif
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windowMenu = menuBar()->addMenu(tr("&Window"));
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connect(windowMenu, &QMenu::aboutToShow, this, &MainWindow::updateWindowMenu);
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closeAct = new QAction(tr("Cl&ose"), this);
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closeAct->setStatusTip(tr("Close the active window"));
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connect(closeAct, &QAction::triggered,
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mdiArea, &QMdiArea::closeActiveSubWindow);
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closeAllAct = new QAction(tr("Close &All"), this);
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closeAllAct->setStatusTip(tr("Close all the windows"));
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connect(closeAllAct, &QAction::triggered, mdiArea, &QMdiArea::closeAllSubWindows);
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tileAct = new QAction(tr("&Tile"), this);
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tileAct->setStatusTip(tr("Tile the windows"));
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connect(tileAct, &QAction::triggered, mdiArea, &QMdiArea::tileSubWindows);
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cascadeAct = new QAction(tr("&Cascade"), this);
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cascadeAct->setStatusTip(tr("Cascade the windows"));
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connect(cascadeAct, &QAction::triggered, mdiArea, &QMdiArea::cascadeSubWindows);
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nextAct = new QAction(tr("Ne&xt"), this);
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nextAct->setShortcuts(QKeySequence::NextChild);
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nextAct->setStatusTip(tr("Move the focus to the next window"));
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connect(nextAct, &QAction::triggered, mdiArea, &QMdiArea::activateNextSubWindow);
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previousAct = new QAction(tr("Pre&vious"), this);
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previousAct->setShortcuts(QKeySequence::PreviousChild);
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previousAct->setStatusTip(tr("Move the focus to the previous "
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"window"));
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connect(previousAct, &QAction::triggered, mdiArea, &QMdiArea::activatePreviousSubWindow);
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windowMenuSeparatorAct = new QAction(this);
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windowMenuSeparatorAct->setSeparator(true);
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updateWindowMenu();
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menuBar()->addSeparator();
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QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
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QAction *aboutAct = helpMenu->addAction(tr("&About"), this, &MainWindow::about);
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aboutAct->setStatusTip(tr("Show the application's About box"));
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QAction *aboutQtAct = helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
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aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
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}
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void MainWindow::createStatusBar()
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{
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statusBar()->showMessage(tr("Ready"));
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}
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void MainWindow::readSettings()
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{
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QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
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const QByteArray geometry = settings.value("geometry", QByteArray()).toByteArray();
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if (geometry.isEmpty()) {
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const QRect availableGeometry = screen()->availableGeometry();
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resize(availableGeometry.width() / 3, availableGeometry.height() / 2);
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move((availableGeometry.width() - width()) / 2,
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(availableGeometry.height() - height()) / 2);
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} else {
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restoreGeometry(geometry);
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}
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}
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void MainWindow::writeSettings()
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{
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QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
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settings.setValue("geometry", saveGeometry());
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}
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MdiChild *MainWindow::activeMdiChild() const
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{
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if (QMdiSubWindow *activeSubWindow = mdiArea->activeSubWindow())
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return qobject_cast<MdiChild *>(activeSubWindow->widget());
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return nullptr;
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}
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QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName) const
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{
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QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
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const QList<QMdiSubWindow *> subWindows = mdiArea->subWindowList();
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for (QMdiSubWindow *window : subWindows) {
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MdiChild *mdiChild = qobject_cast<MdiChild *>(window->widget());
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if (mdiChild->currentFile() == canonicalFilePath)
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return window;
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}
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return nullptr;
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}
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void MainWindow::switchLayoutDirection()
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{
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if (layoutDirection() == Qt::LeftToRight)
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QGuiApplication::setLayoutDirection(Qt::RightToLeft);
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else
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QGuiApplication::setLayoutDirection(Qt::LeftToRight);
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}
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