Add recent file handling to SDI/MDI and remove the recentfiles example.
The existing recentfiles example was basically a clone of the SDI example with a "Recent" menu added. Assuming it is better to have it all in one place, the functionality is merged into the existing SDI/MDI examples. - Implement recently opened files handling using a submenu and a QSettings array in the SDI/MDI examples. - Remove recentfiles example. Change-Id: Id5a1ab9fa1c2e6b9ec81309cfe74cf86f450392a Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
This commit is contained in:
Friedemann Kleint
parent
57dbdcd92f
commit
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@ -50,11 +50,10 @@
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To keep the example simple, recently opened files aren't shown in
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the \uicontrol{File} menu, even though this feature is desired in 90%
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of applications. The \l{mainwindows/recentfiles}{Recent Files}
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example shows how to implement this. Furthermore, this example
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can only load one file at a time. The \l{mainwindows/sdi}{SDI}
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and \l{mainwindows/mdi}{MDI} examples shows how to lift these
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restrictions.
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of applications. Furthermore, this example can only load one file at a
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time. The \l{mainwindows/sdi}{SDI} and \l{mainwindows/mdi}{MDI} examples
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show how to lift these restrictions and how to implement recently opened files
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handling.
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\section1 MainWindow Class Definition
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@ -1,37 +0,0 @@
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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the documentation of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:FDL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
|
||||
** accordance with the commercial license agreement provided with the
|
||||
** Software or, alternatively, in accordance with the terms contained in
|
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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||||
** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Free Documentation License Usage
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** Alternatively, this file may be used under the terms of the GNU Free
|
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** Documentation License version 1.3 as published by the Free Software
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** Foundation and appearing in the file included in the packaging of
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** this file. Please review the following information to ensure
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** the GNU Free Documentation License version 1.3 requirements
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** will be met: http://www.gnu.org/copyleft/fdl.html.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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/*!
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\example mainwindows/recentfiles
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\title Recent Files Example
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\ingroup examples-mainwindow
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\brief The Recent Files example shows how a standard File menu can be extended to show
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the most recent files loaded by a main window application.
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\image recentfiles-example.png
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*/
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@ -4,5 +4,4 @@ SUBDIRS = application \
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mainwindow \
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mdi \
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menus \
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recentfiles \
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sdi
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@ -49,6 +49,8 @@ int main(int argc, char *argv[])
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Q_INIT_RESOURCE(mdi);
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QApplication app(argc, argv);
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QCoreApplication::setApplicationName("MDI Example");
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QCoreApplication::setOrganizationName("QtProject");
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QCoreApplication::setApplicationVersion(QT_VERSION_STR);
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QCommandLineParser parser;
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parser.setApplicationDescription("Qt MDI Example");
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@ -82,19 +82,24 @@ void MainWindow::newFile()
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void MainWindow::open()
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{
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QString fileName = QFileDialog::getOpenFileName(this);
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if (!fileName.isEmpty()) {
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if (QMdiSubWindow *existing = findMdiChild(fileName)) {
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mdiArea->setActiveSubWindow(existing);
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return;
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}
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if (openFile(fileName))
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statusBar()->showMessage(tr("File loaded"), 2000);
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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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@ -102,9 +107,87 @@ bool MainWindow::openFile(const QString &fileName)
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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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@ -113,8 +196,11 @@ void MainWindow::save()
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void MainWindow::saveAs()
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{
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if (activeMdiChild() && activeMdiChild()->saveAs())
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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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@ -262,8 +348,23 @@ void MainWindow::createActions()
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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::closeAllWindows);
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@ -68,6 +68,8 @@ private slots:
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void open();
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void save();
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void saveAs();
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void updateRecentFileActions();
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void openRecentFile();
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#ifndef QT_NO_CLIPBOARD
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void cut();
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void copy();
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@ -80,10 +82,16 @@ private slots:
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void switchLayoutDirection();
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private:
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enum { MaxRecentFiles = 5 };
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void createActions();
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void createStatusBar();
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void readSettings();
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void writeSettings();
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bool loadFile(const QString &fileName);
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static bool hasRecentFiles();
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void prependToRecentFiles(const QString &fileName);
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void setRecentFilesVisible(bool visible);
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MdiChild *activeMdiChild() const;
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QMdiSubWindow *findMdiChild(const QString &fileName) const;
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@ -93,6 +101,9 @@ private:
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QAction *newAct;
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QAction *saveAct;
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QAction *saveAsAct;
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QAction *recentFileActs[MaxRecentFiles];
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QAction *recentFileSeparator;
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QAction *recentFileSubMenuAct;
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#ifndef QT_NO_CLIPBOARD
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QAction *cutAct;
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QAction *copyAct;
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@ -1,53 +0,0 @@
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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
|
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** modification, are permitted provided that the following conditions are
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||||
** met:
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||||
** * Redistributions of source code must retain the above copyright
|
||||
** notice, this list of conditions and the following disclaimer.
|
||||
** * Redistributions in binary form must reproduce the above copyright
|
||||
** notice, this list of conditions and the following disclaimer in
|
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** the documentation and/or other materials provided with the
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** distribution.
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||||
** * Neither the name of The Qt Company Ltd nor the names of its
|
||||
** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
|
||||
**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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||||
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QApplication>
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#include "mainwindow.h"
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int main(int argc, char *argv[])
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{
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QApplication app(argc, argv);
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app.setOrganizationName("QtProject");
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app.setApplicationName("Recent Files Example");
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MainWindow *mainWin = new MainWindow;
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mainWin->show();
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return app.exec();
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}
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@ -1,251 +0,0 @@
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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
|
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** "Redistribution and use in source and binary forms, with or without
|
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** modification, are permitted provided that the following conditions are
|
||||
** met:
|
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** * Redistributions of source code must retain the above copyright
|
||||
** notice, this list of conditions and the following disclaimer.
|
||||
** * Redistributions in binary form must reproduce the above copyright
|
||||
** notice, this list of conditions and the following disclaimer in
|
||||
** the documentation and/or other materials provided with the
|
||||
** distribution.
|
||||
** * Neither the name of The Qt Company Ltd nor the names of its
|
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** contributors may be used to endorse or promote products derived
|
||||
** from this software without specific prior written permission.
|
||||
**
|
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
||||
**
|
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** $QT_END_LICENSE$
|
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**
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****************************************************************************/
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#include <QtWidgets>
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#include "mainwindow.h"
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MainWindow::MainWindow()
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{
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setAttribute(Qt::WA_DeleteOnClose);
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textEdit = new QTextEdit;
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setCentralWidget(textEdit);
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createActions();
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createMenus();
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(void)statusBar();
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setWindowFilePath(QString());
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resize(400, 300);
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}
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void MainWindow::newFile()
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{
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MainWindow *other = new MainWindow;
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other->show();
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}
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void MainWindow::open()
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{
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QString fileName = QFileDialog::getOpenFileName(this);
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if (!fileName.isEmpty())
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loadFile(fileName);
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}
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void MainWindow::save()
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{
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if (curFile.isEmpty())
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saveAs();
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else
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saveFile(curFile);
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}
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void MainWindow::saveAs()
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{
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QString fileName = QFileDialog::getSaveFileName(this);
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if (fileName.isEmpty())
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return;
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saveFile(fileName);
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}
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void MainWindow::openRecentFile()
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{
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QAction *action = qobject_cast<QAction *>(sender());
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if (action)
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loadFile(action->data().toString());
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}
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void MainWindow::about()
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{
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QMessageBox::about(this, tr("About Recent Files"),
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tr("The <b>Recent Files</b> example demonstrates how to provide a "
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"recently used file menu in a Qt application."));
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}
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void MainWindow::createActions()
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{
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newAct = new QAction(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, SIGNAL(triggered()), this, SLOT(newFile()));
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openAct = new QAction(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, SIGNAL(triggered()), this, SLOT(open()));
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saveAct = new QAction(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, SIGNAL(triggered()), this, SLOT(save()));
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saveAsAct = new QAction(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, SIGNAL(triggered()), this, SLOT(saveAs()));
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for (int i = 0; i < MaxRecentFiles; ++i) {
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recentFileActs[i] = new QAction(this);
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recentFileActs[i]->setVisible(false);
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connect(recentFileActs[i], SIGNAL(triggered()),
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this, SLOT(openRecentFile()));
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}
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exitAct = new QAction(tr("E&xit"), this);
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exitAct->setShortcuts(QKeySequence::Quit);
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exitAct->setStatusTip(tr("Exit the application"));
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connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
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aboutAct = new QAction(tr("&About"), this);
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aboutAct->setStatusTip(tr("Show the application's About box"));
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connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
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aboutQtAct = new QAction(tr("About &Qt"), this);
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aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
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connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
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}
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void MainWindow::createMenus()
|
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{
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fileMenu = menuBar()->addMenu(tr("&File"));
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fileMenu->addAction(newAct);
|
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fileMenu->addAction(openAct);
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fileMenu->addAction(saveAct);
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fileMenu->addAction(saveAsAct);
|
||||
separatorAct = fileMenu->addSeparator();
|
||||
for (int i = 0; i < MaxRecentFiles; ++i)
|
||||
fileMenu->addAction(recentFileActs[i]);
|
||||
fileMenu->addSeparator();
|
||||
fileMenu->addAction(exitAct);
|
||||
updateRecentFileActions();
|
||||
|
||||
menuBar()->addSeparator();
|
||||
|
||||
helpMenu = menuBar()->addMenu(tr("&Help"));
|
||||
helpMenu->addAction(aboutAct);
|
||||
helpMenu->addAction(aboutQtAct);
|
||||
}
|
||||
|
||||
void MainWindow::loadFile(const QString &fileName)
|
||||
{
|
||||
QFile file(fileName);
|
||||
if (!file.open(QFile::ReadOnly | QFile::Text)) {
|
||||
QMessageBox::warning(this, tr("Recent Files"),
|
||||
tr("Cannot read file %1:\n%2.")
|
||||
.arg(fileName)
|
||||
.arg(file.errorString()));
|
||||
return;
|
||||
}
|
||||
|
||||
QTextStream in(&file);
|
||||
QApplication::setOverrideCursor(Qt::WaitCursor);
|
||||
textEdit->setPlainText(in.readAll());
|
||||
QApplication::restoreOverrideCursor();
|
||||
|
||||
setCurrentFile(fileName);
|
||||
statusBar()->showMessage(tr("File loaded"), 2000);
|
||||
}
|
||||
|
||||
void MainWindow::saveFile(const QString &fileName)
|
||||
{
|
||||
QFile file(fileName);
|
||||
if (!file.open(QFile::WriteOnly | QFile::Text)) {
|
||||
QMessageBox::warning(this, tr("Recent Files"),
|
||||
tr("Cannot write file %1:\n%2.")
|
||||
.arg(fileName)
|
||||
.arg(file.errorString()));
|
||||
return;
|
||||
}
|
||||
|
||||
QTextStream out(&file);
|
||||
QApplication::setOverrideCursor(Qt::WaitCursor);
|
||||
out << textEdit->toPlainText();
|
||||
QApplication::restoreOverrideCursor();
|
||||
|
||||
setCurrentFile(fileName);
|
||||
statusBar()->showMessage(tr("File saved"), 2000);
|
||||
}
|
||||
|
||||
void MainWindow::setCurrentFile(const QString &fileName)
|
||||
{
|
||||
curFile = fileName;
|
||||
setWindowFilePath(curFile);
|
||||
|
||||
QSettings settings;
|
||||
QStringList files = settings.value("recentFileList").toStringList();
|
||||
files.removeAll(fileName);
|
||||
files.prepend(fileName);
|
||||
while (files.size() > MaxRecentFiles)
|
||||
files.removeLast();
|
||||
|
||||
settings.setValue("recentFileList", files);
|
||||
|
||||
foreach (QWidget *widget, QApplication::topLevelWidgets()) {
|
||||
MainWindow *mainWin = qobject_cast<MainWindow *>(widget);
|
||||
if (mainWin)
|
||||
mainWin->updateRecentFileActions();
|
||||
}
|
||||
}
|
||||
|
||||
void MainWindow::updateRecentFileActions()
|
||||
{
|
||||
QSettings settings;
|
||||
QStringList files = settings.value("recentFileList").toStringList();
|
||||
|
||||
int numRecentFiles = qMin(files.size(), (int)MaxRecentFiles);
|
||||
|
||||
for (int i = 0; i < numRecentFiles; ++i) {
|
||||
QString text = tr("&%1 %2").arg(i + 1).arg(strippedName(files[i]));
|
||||
recentFileActs[i]->setText(text);
|
||||
recentFileActs[i]->setData(files[i]);
|
||||
recentFileActs[i]->setVisible(true);
|
||||
}
|
||||
for (int j = numRecentFiles; j < MaxRecentFiles; ++j)
|
||||
recentFileActs[j]->setVisible(false);
|
||||
|
||||
separatorAct->setVisible(numRecentFiles > 0);
|
||||
}
|
||||
|
||||
QString MainWindow::strippedName(const QString &fullFileName)
|
||||
{
|
||||
return QFileInfo(fullFileName).fileName();
|
||||
}
|
||||
@ -1,96 +0,0 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Copyright (C) 2015 The Qt Company Ltd.
|
||||
** Contact: http://www.qt.io/licensing/
|
||||
**
|
||||
** This file is part of the examples of the Qt Toolkit.
|
||||
**
|
||||
** $QT_BEGIN_LICENSE:BSD$
|
||||
** You may use this file under the terms of the BSD license as follows:
|
||||
**
|
||||
** "Redistribution and use in source and binary forms, with or without
|
||||
** modification, are permitted provided that the following conditions are
|
||||
** met:
|
||||
** * Redistributions of source code must retain the above copyright
|
||||
** notice, this list of conditions and the following disclaimer.
|
||||
** * Redistributions in binary form must reproduce the above copyright
|
||||
** notice, this list of conditions and the following disclaimer in
|
||||
** the documentation and/or other materials provided with the
|
||||
** distribution.
|
||||
** * Neither the name of The Qt Company Ltd nor the names of its
|
||||
** contributors may be used to endorse or promote products derived
|
||||
** from this software without specific prior written permission.
|
||||
**
|
||||
**
|
||||
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
||||
**
|
||||
** $QT_END_LICENSE$
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef MAINWINDOW_H
|
||||
#define MAINWINDOW_H
|
||||
|
||||
#include <QList>
|
||||
#include <QMainWindow>
|
||||
|
||||
QT_BEGIN_NAMESPACE
|
||||
class QAction;
|
||||
class QMenu;
|
||||
class QTextEdit;
|
||||
QT_END_NAMESPACE
|
||||
|
||||
class MainWindow : public QMainWindow
|
||||
{
|
||||
Q_OBJECT
|
||||
|
||||
public:
|
||||
MainWindow();
|
||||
|
||||
private slots:
|
||||
void newFile();
|
||||
void open();
|
||||
void save();
|
||||
void saveAs();
|
||||
void openRecentFile();
|
||||
void about();
|
||||
|
||||
private:
|
||||
void createActions();
|
||||
void createMenus();
|
||||
void loadFile(const QString &fileName);
|
||||
void saveFile(const QString &fileName);
|
||||
void setCurrentFile(const QString &fileName);
|
||||
void updateRecentFileActions();
|
||||
QString strippedName(const QString &fullFileName);
|
||||
|
||||
QString curFile;
|
||||
|
||||
QTextEdit *textEdit;
|
||||
QMenu *fileMenu;
|
||||
QMenu *recentFilesMenu;
|
||||
QMenu *helpMenu;
|
||||
QAction *newAct;
|
||||
QAction *openAct;
|
||||
QAction *saveAct;
|
||||
QAction *saveAsAct;
|
||||
QAction *exitAct;
|
||||
QAction *aboutAct;
|
||||
QAction *aboutQtAct;
|
||||
QAction *separatorAct;
|
||||
|
||||
enum { MaxRecentFiles = 5 };
|
||||
QAction *recentFileActs[MaxRecentFiles];
|
||||
};
|
||||
|
||||
#endif
|
||||
@ -1,9 +0,0 @@
|
||||
QT += widgets
|
||||
|
||||
HEADERS = mainwindow.h
|
||||
SOURCES = main.cpp \
|
||||
mainwindow.cpp
|
||||
|
||||
# install
|
||||
target.path = $$[QT_INSTALL_EXAMPLES]/widgets/mainwindows/recentfiles
|
||||
INSTALLS += target
|
||||
@ -74,9 +74,12 @@ void MainWindow::newFile()
|
||||
void MainWindow::open()
|
||||
{
|
||||
const QString fileName = QFileDialog::getOpenFileName(this);
|
||||
if (fileName.isEmpty())
|
||||
return;
|
||||
if (!fileName.isEmpty())
|
||||
openFile(fileName);
|
||||
}
|
||||
|
||||
void MainWindow::openFile(const QString &fileName)
|
||||
{
|
||||
MainWindow *existing = findMainWindow(fileName);
|
||||
if (existing) {
|
||||
existing->show();
|
||||
@ -196,6 +199,19 @@ void MainWindow::createActions()
|
||||
|
||||
fileMenu->addSeparator();
|
||||
|
||||
QMenu *recentMenu = fileMenu->addMenu(tr("Recent..."));
|
||||
connect(recentMenu, &QMenu::aboutToShow, this, &MainWindow::updateRecentFileActions);
|
||||
recentFileSubMenuAct = recentMenu->menuAction();
|
||||
|
||||
for (int i = 0; i < MaxRecentFiles; ++i) {
|
||||
recentFileActs[i] = recentMenu->addAction(QString(), this, &MainWindow::openRecentFile);
|
||||
recentFileActs[i]->setVisible(false);
|
||||
}
|
||||
|
||||
recentFileSeparator = fileMenu->addSeparator();
|
||||
|
||||
setRecentFilesVisible(MainWindow::hasRecentFiles());
|
||||
|
||||
QAction *closeAct = fileMenu->addAction(tr("&Close"), this, &QWidget::close);
|
||||
closeAct->setShortcut(tr("Ctrl+W"));
|
||||
closeAct->setStatusTip(tr("Close this window"));
|
||||
@ -316,6 +332,83 @@ void MainWindow::loadFile(const QString &fileName)
|
||||
statusBar()->showMessage(tr("File loaded"), 2000);
|
||||
}
|
||||
|
||||
void MainWindow::setRecentFilesVisible(bool visible)
|
||||
{
|
||||
recentFileSubMenuAct->setVisible(visible);
|
||||
recentFileSeparator->setVisible(visible);
|
||||
}
|
||||
|
||||
static inline QString recentFilesKey() { return QStringLiteral("recentFileList"); }
|
||||
static inline QString fileKey() { return QStringLiteral("file"); }
|
||||
|
||||
static QStringList readRecentFiles(QSettings &settings)
|
||||
{
|
||||
QStringList result;
|
||||
const int count = settings.beginReadArray(recentFilesKey());
|
||||
for (int i = 0; i < count; ++i) {
|
||||
settings.setArrayIndex(i);
|
||||
result.append(settings.value(fileKey()).toString());
|
||||
}
|
||||
settings.endArray();
|
||||
return result;
|
||||
}
|
||||
|
||||
static void writeRecentFiles(const QStringList &files, QSettings &settings)
|
||||
{
|
||||
const int count = files.size();
|
||||
settings.beginWriteArray(recentFilesKey());
|
||||
for (int i = 0; i < count; ++i) {
|
||||
settings.setArrayIndex(i);
|
||||
settings.setValue(fileKey(), files.at(i));
|
||||
}
|
||||
settings.endArray();
|
||||
}
|
||||
|
||||
bool MainWindow::hasRecentFiles()
|
||||
{
|
||||
QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
|
||||
const int count = settings.beginReadArray(recentFilesKey());
|
||||
settings.endArray();
|
||||
return count > 0;
|
||||
}
|
||||
|
||||
void MainWindow::prependToRecentFiles(const QString &fileName)
|
||||
{
|
||||
QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
|
||||
|
||||
const QStringList oldRecentFiles = readRecentFiles(settings);
|
||||
QStringList recentFiles = oldRecentFiles;
|
||||
recentFiles.removeAll(fileName);
|
||||
recentFiles.prepend(fileName);
|
||||
if (oldRecentFiles != recentFiles)
|
||||
writeRecentFiles(recentFiles, settings);
|
||||
|
||||
setRecentFilesVisible(!recentFiles.isEmpty());
|
||||
}
|
||||
|
||||
void MainWindow::updateRecentFileActions()
|
||||
{
|
||||
QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
|
||||
|
||||
const QStringList recentFiles = readRecentFiles(settings);
|
||||
const int count = qMin(int(MaxRecentFiles), recentFiles.size());
|
||||
int i = 0;
|
||||
for ( ; i < count; ++i) {
|
||||
const QString fileName = MainWindow::strippedName(recentFiles.at(i));
|
||||
recentFileActs[i]->setText(tr("&%1 %2").arg(i + 1).arg(fileName));
|
||||
recentFileActs[i]->setData(recentFiles.at(i));
|
||||
recentFileActs[i]->setVisible(true);
|
||||
}
|
||||
for ( ; i < MaxRecentFiles; ++i)
|
||||
recentFileActs[i]->setVisible(false);
|
||||
}
|
||||
|
||||
void MainWindow::openRecentFile()
|
||||
{
|
||||
if (const QAction *action = qobject_cast<const QAction *>(sender()))
|
||||
openFile(action->data().toString());
|
||||
}
|
||||
|
||||
bool MainWindow::saveFile(const QString &fileName)
|
||||
{
|
||||
QFile file(fileName);
|
||||
@ -349,6 +442,10 @@ void MainWindow::setCurrentFile(const QString &fileName)
|
||||
|
||||
textEdit->document()->setModified(false);
|
||||
setWindowModified(false);
|
||||
|
||||
if (!isUntitled && windowFilePath() != curFile)
|
||||
MainWindow::prependToRecentFiles(curFile);
|
||||
|
||||
setWindowFilePath(curFile);
|
||||
}
|
||||
|
||||
|
||||
@ -70,23 +70,36 @@ private slots:
|
||||
void open();
|
||||
bool save();
|
||||
bool saveAs();
|
||||
void updateRecentFileActions();
|
||||
void openRecentFile();
|
||||
void about();
|
||||
void documentWasModified();
|
||||
|
||||
private:
|
||||
enum { MaxRecentFiles = 5 };
|
||||
|
||||
void init();
|
||||
void createActions();
|
||||
void createStatusBar();
|
||||
void readSettings();
|
||||
void writeSettings();
|
||||
bool maybeSave();
|
||||
void openFile(const QString &fileName);
|
||||
void loadFile(const QString &fileName);
|
||||
static bool hasRecentFiles();
|
||||
void prependToRecentFiles(const QString &fileName);
|
||||
void setRecentFilesVisible(bool visible);
|
||||
bool saveFile(const QString &fileName);
|
||||
void setCurrentFile(const QString &fileName);
|
||||
static QString strippedName(const QString &fullFileName);
|
||||
MainWindow *findMainWindow(const QString &fileName) const;
|
||||
|
||||
QTextEdit *textEdit;
|
||||
|
||||
QAction *recentFileActs[MaxRecentFiles];
|
||||
QAction *recentFileSeparator;
|
||||
QAction *recentFileSubMenuAct;
|
||||
|
||||
QString curFile;
|
||||
bool isUntitled;
|
||||
};
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user