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Diffstat (limited to 'examples/widgets/mainwindows/mdi/mainwindow.cpp')
-rw-r--r--examples/widgets/mainwindows/mdi/mainwindow.cpp215
1 files changed, 101 insertions, 114 deletions
diff --git a/examples/widgets/mainwindows/mdi/mainwindow.cpp b/examples/widgets/mainwindows/mdi/mainwindow.cpp
index 83ffbf6557..4dada5ce70 100644
--- a/examples/widgets/mainwindows/mdi/mainwindow.cpp
+++ b/examples/widgets/mainwindows/mdi/mainwindow.cpp
@@ -44,20 +44,15 @@
#include "mdichild.h"
MainWindow::MainWindow()
+ : mdiArea(new QMdiArea)
{
- mdiArea = new QMdiArea;
mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setCentralWidget(mdiArea);
- connect(mdiArea, SIGNAL(subWindowActivated(QMdiSubWindow*)),
- this, SLOT(updateMenus()));
- windowMapper = new QSignalMapper(this);
- connect(windowMapper, SIGNAL(mapped(QWidget*)),
- this, SLOT(setActiveSubWindow(QWidget*)));
+ connect(mdiArea, &QMdiArea::subWindowActivated,
+ this, &MainWindow::updateMenus);
createActions();
- createMenus();
- createToolBars();
createStatusBar();
updateMenus();
@@ -89,8 +84,7 @@ void MainWindow::open()
{
QString fileName = QFileDialog::getOpenFileName(this);
if (!fileName.isEmpty()) {
- QMdiSubWindow *existing = findMdiChild(fileName);
- if (existing) {
+ if (QMdiSubWindow *existing = findMdiChild(fileName)) {
mdiArea->setActiveSubWindow(existing);
return;
}
@@ -164,7 +158,7 @@ void MainWindow::updateMenus()
cascadeAct->setEnabled(hasMdiChild);
nextAct->setEnabled(hasMdiChild);
previousAct->setEnabled(hasMdiChild);
- separatorAct->setVisible(hasMdiChild);
+ windowMenuSeparatorAct->setVisible(hasMdiChild);
#ifndef QT_NO_CLIPBOARD
bool hasSelection = (activeMdiChild() &&
@@ -174,6 +168,16 @@ void MainWindow::updateMenus()
#endif
}
+class ActiveMdiSubWindowFunctor {
+public:
+ explicit ActiveMdiSubWindowFunctor(QMdiArea *mdiArea, QMdiSubWindow *activeWindow) : m_mdiArea(mdiArea), m_activeWindow(activeWindow) {}
+ void operator()() const { m_mdiArea->setActiveSubWindow(m_activeWindow); }
+
+private:
+ QMdiArea *m_mdiArea;
+ QMdiSubWindow *m_activeWindow;
+};
+
void MainWindow::updateWindowMenu()
{
windowMenu->clear();
@@ -185,13 +189,14 @@ void MainWindow::updateWindowMenu()
windowMenu->addSeparator();
windowMenu->addAction(nextAct);
windowMenu->addAction(previousAct);
- windowMenu->addAction(separatorAct);
+ windowMenu->addAction(windowMenuSeparatorAct);
QList<QMdiSubWindow *> windows = mdiArea->subWindowList();
- separatorAct->setVisible(!windows.isEmpty());
+ windowMenuSeparatorAct->setVisible(!windows.isEmpty());
for (int i = 0; i < windows.size(); ++i) {
- MdiChild *child = qobject_cast<MdiChild *>(windows.at(i)->widget());
+ QMdiSubWindow *mdiSubWindow = windows.at(i);
+ MdiChild *child = qobject_cast<MdiChild *>(mdiSubWindow->widget());
QString text;
if (i < 9) {
@@ -201,11 +206,9 @@ void MainWindow::updateWindowMenu()
text = tr("%1 %2").arg(i + 1)
.arg(child->userFriendlyCurrentFile());
}
- QAction *action = windowMenu->addAction(text);
+ QAction *action = windowMenu->addAction(text, mdiSubWindow, ActiveMdiSubWindowFunctor(mdiArea, mdiSubWindow));
action->setCheckable(true);
action ->setChecked(child == activeMdiChild());
- connect(action, SIGNAL(triggered()), windowMapper, SLOT(map()));
- windowMapper->setMapping(action, windows.at(i));
}
}
@@ -215,10 +218,8 @@ MdiChild *MainWindow::createMdiChild()
mdiArea->addSubWindow(child);
#ifndef QT_NO_CLIPBOARD
- connect(child, SIGNAL(copyAvailable(bool)),
- cutAct, SLOT(setEnabled(bool)));
- connect(child, SIGNAL(copyAvailable(bool)),
- copyAct, SLOT(setEnabled(bool)));
+ connect(child, &QTextEdit::copyAvailable, cutAct, &QAction::setEnabled);
+ connect(child, &QTextEdit::copyAvailable, copyAct, &QAction::setEnabled);
#endif
return child;
@@ -226,139 +227,128 @@ MdiChild *MainWindow::createMdiChild()
void MainWindow::createActions()
{
- newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
+ QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
+ QToolBar *fileToolBar = addToolBar(tr("File"));
+
+ const QIcon newIcon = QIcon::fromTheme("document-new", QIcon(":/images/new.png"));
+ newAct = new QAction(newIcon, tr("&New"), this);
newAct->setShortcuts(QKeySequence::New);
newAct->setStatusTip(tr("Create a new file"));
- connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
+ connect(newAct, &QAction::triggered, this, &MainWindow::newFile);
+ fileMenu->addAction(newAct);
+ fileToolBar->addAction(newAct);
- openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this);
+ const QIcon openIcon = QIcon::fromTheme("document-open", QIcon(":/images/open.png"));
+ QAction *openAct = new QAction(openIcon, tr("&Open..."), this);
openAct->setShortcuts(QKeySequence::Open);
openAct->setStatusTip(tr("Open an existing file"));
- connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+ connect(openAct, &QAction::triggered, this, &MainWindow::open);
+ fileMenu->addAction(openAct);
+ fileToolBar->addAction(openAct);
- saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save"), this);
+ const QIcon saveIcon = QIcon::fromTheme("document-save", QIcon(":/images/save.png"));
+ saveAct = new QAction(saveIcon, tr("&Save"), this);
saveAct->setShortcuts(QKeySequence::Save);
saveAct->setStatusTip(tr("Save the document to disk"));
- connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+ connect(saveAct, &QAction::triggered, this, &MainWindow::save);
+ fileToolBar->addAction(saveAct);
- saveAsAct = new QAction(tr("Save &As..."), this);
+ const QIcon saveAsIcon = QIcon::fromTheme("document-save-as");
+ saveAsAct = new QAction(saveAsIcon, tr("Save &As..."), this);
saveAsAct->setShortcuts(QKeySequence::SaveAs);
saveAsAct->setStatusTip(tr("Save the document under a new name"));
- connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
+ connect(saveAsAct, &QAction::triggered, this, &MainWindow::saveAs);
+ fileMenu->addAction(saveAsAct);
+
+ fileMenu->addSeparator();
+
+ fileMenu->addAction(tr("Switch layout direction"), this, &MainWindow::switchLayoutDirection);
//! [0]
- exitAct = new QAction(tr("E&xit"), this);
+ const QIcon exitIcon = QIcon::fromTheme("application-exit");
+ QAction *exitAct = fileMenu->addAction(exitIcon, tr("E&xit"), qApp, &QApplication::closeAllWindows);
exitAct->setShortcuts(QKeySequence::Quit);
exitAct->setStatusTip(tr("Exit the application"));
- connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
+ fileMenu->addAction(exitAct);
//! [0]
#ifndef QT_NO_CLIPBOARD
- cutAct = new QAction(QIcon(":/images/cut.png"), tr("Cu&t"), this);
+ QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
+ QToolBar *editToolBar = addToolBar(tr("Edit"));
+
+ const QIcon cutIcon = QIcon::fromTheme("edit-cut", QIcon(":/images/cut.png"));
+ cutAct = new QAction(cutIcon, tr("Cu&t"), this);
cutAct->setShortcuts(QKeySequence::Cut);
cutAct->setStatusTip(tr("Cut the current selection's contents to the "
"clipboard"));
- connect(cutAct, SIGNAL(triggered()), this, SLOT(cut()));
+ connect(cutAct, &QAction::triggered, this, &MainWindow::cut);
+ editMenu->addAction(cutAct);
+ editToolBar->addAction(cutAct);
- copyAct = new QAction(QIcon(":/images/copy.png"), tr("&Copy"), this);
+ const QIcon copyIcon = QIcon::fromTheme("edit-copy", QIcon(":/images/copy.png"));
+ copyAct = new QAction(copyIcon, tr("&Copy"), this);
copyAct->setShortcuts(QKeySequence::Copy);
copyAct->setStatusTip(tr("Copy the current selection's contents to the "
"clipboard"));
- connect(copyAct, SIGNAL(triggered()), this, SLOT(copy()));
+ connect(copyAct, &QAction::triggered, this, &MainWindow::copy);
+ editMenu->addAction(copyAct);
+ editToolBar->addAction(copyAct);
- pasteAct = new QAction(QIcon(":/images/paste.png"), tr("&Paste"), this);
+ const QIcon pasteIcon = QIcon::fromTheme("edit-paste", QIcon(":/images/paste.png"));
+ pasteAct = new QAction(pasteIcon, tr("&Paste"), this);
pasteAct->setShortcuts(QKeySequence::Paste);
pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
"selection"));
- connect(pasteAct, SIGNAL(triggered()), this, SLOT(paste()));
+ connect(pasteAct, &QAction::triggered, this, &MainWindow::paste);
+ editMenu->addAction(pasteAct);
+ editToolBar->addAction(pasteAct);
#endif
+ windowMenu = menuBar()->addMenu(tr("&Window"));
+ connect(windowMenu, &QMenu::aboutToShow, this, &MainWindow::updateWindowMenu);
+
closeAct = new QAction(tr("Cl&ose"), this);
closeAct->setStatusTip(tr("Close the active window"));
- connect(closeAct, SIGNAL(triggered()),
- mdiArea, SLOT(closeActiveSubWindow()));
+ connect(closeAct, &QAction::triggered,
+ mdiArea, &QMdiArea::closeActiveSubWindow);
closeAllAct = new QAction(tr("Close &All"), this);
closeAllAct->setStatusTip(tr("Close all the windows"));
- connect(closeAllAct, SIGNAL(triggered()),
- mdiArea, SLOT(closeAllSubWindows()));
+ connect(closeAllAct, &QAction::triggered, mdiArea, &QMdiArea::closeAllSubWindows);
tileAct = new QAction(tr("&Tile"), this);
tileAct->setStatusTip(tr("Tile the windows"));
- connect(tileAct, SIGNAL(triggered()), mdiArea, SLOT(tileSubWindows()));
+ connect(tileAct, &QAction::triggered, mdiArea, &QMdiArea::tileSubWindows);
cascadeAct = new QAction(tr("&Cascade"), this);
cascadeAct->setStatusTip(tr("Cascade the windows"));
- connect(cascadeAct, SIGNAL(triggered()), mdiArea, SLOT(cascadeSubWindows()));
+ connect(cascadeAct, &QAction::triggered, mdiArea, &QMdiArea::cascadeSubWindows);
nextAct = new QAction(tr("Ne&xt"), this);
nextAct->setShortcuts(QKeySequence::NextChild);
nextAct->setStatusTip(tr("Move the focus to the next window"));
- connect(nextAct, SIGNAL(triggered()),
- mdiArea, SLOT(activateNextSubWindow()));
+ connect(nextAct, &QAction::triggered, mdiArea, &QMdiArea::activateNextSubWindow);
previousAct = new QAction(tr("Pre&vious"), this);
previousAct->setShortcuts(QKeySequence::PreviousChild);
previousAct->setStatusTip(tr("Move the focus to the previous "
"window"));
- connect(previousAct, SIGNAL(triggered()),
- mdiArea, SLOT(activatePreviousSubWindow()));
-
- separatorAct = new QAction(this);
- separatorAct->setSeparator(true);
-
- aboutAct = new QAction(tr("&About"), this);
- aboutAct->setStatusTip(tr("Show the application's About box"));
- connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
-
- aboutQtAct = new QAction(tr("About &Qt"), this);
- aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
- connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
-}
-
-void MainWindow::createMenus()
-{
- fileMenu = menuBar()->addMenu(tr("&File"));
- fileMenu->addAction(newAct);
- fileMenu->addAction(openAct);
- fileMenu->addAction(saveAct);
- fileMenu->addAction(saveAsAct);
- fileMenu->addSeparator();
- QAction *action = fileMenu->addAction(tr("Switch layout direction"));
- connect(action, SIGNAL(triggered()), this, SLOT(switchLayoutDirection()));
- fileMenu->addAction(exitAct);
+ connect(previousAct, &QAction::triggered, mdiArea, &QMdiArea::activatePreviousSubWindow);
- editMenu = menuBar()->addMenu(tr("&Edit"));
-#ifndef QT_NO_CLIPBOARD
- editMenu->addAction(cutAct);
- editMenu->addAction(copyAct);
- editMenu->addAction(pasteAct);
-#endif
+ windowMenuSeparatorAct = new QAction(this);
+ windowMenuSeparatorAct->setSeparator(true);
- windowMenu = menuBar()->addMenu(tr("&Window"));
updateWindowMenu();
- connect(windowMenu, SIGNAL(aboutToShow()), this, SLOT(updateWindowMenu()));
menuBar()->addSeparator();
- helpMenu = menuBar()->addMenu(tr("&Help"));
- helpMenu->addAction(aboutAct);
- helpMenu->addAction(aboutQtAct);
-}
+ QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
-void MainWindow::createToolBars()
-{
- fileToolBar = addToolBar(tr("File"));
- fileToolBar->addAction(newAct);
- fileToolBar->addAction(openAct);
- fileToolBar->addAction(saveAct);
+ QAction *aboutAct = helpMenu->addAction(tr("&About"), this, &MainWindow::about);
+ aboutAct->setStatusTip(tr("Show the application's About box"));
-#ifndef QT_NO_CLIPBOARD
- editToolBar = addToolBar(tr("Edit"));
- editToolBar->addAction(cutAct);
- editToolBar->addAction(copyAct);
- editToolBar->addAction(pasteAct);
-#endif
+ QAction *aboutQtAct = helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
+ aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
}
void MainWindow::createStatusBar()
@@ -368,28 +358,32 @@ void MainWindow::createStatusBar()
void MainWindow::readSettings()
{
- QSettings settings("QtProject", "MDI Example");
- QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
- QSize size = settings.value("size", QSize(400, 400)).toSize();
- move(pos);
- resize(size);
+ QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+ const QByteArray geometry = settings.value("geometry", QByteArray()).toByteArray();
+ if (geometry.isEmpty()) {
+ const QRect availableGeometry = QApplication::desktop()->availableGeometry(this);
+ resize(availableGeometry.width() / 3, availableGeometry.height() / 2);
+ move((availableGeometry.width() - width()) / 2,
+ (availableGeometry.height() - height()) / 2);
+ } else {
+ restoreGeometry(geometry);
+ }
}
void MainWindow::writeSettings()
{
- QSettings settings("QtProject", "MDI Example");
- settings.setValue("pos", pos());
- settings.setValue("size", size());
+ QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+ settings.setValue("geometry", saveGeometry());
}
-MdiChild *MainWindow::activeMdiChild()
+MdiChild *MainWindow::activeMdiChild() const
{
if (QMdiSubWindow *activeSubWindow = mdiArea->activeSubWindow())
return qobject_cast<MdiChild *>(activeSubWindow->widget());
return 0;
}
-QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName)
+QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName) const
{
QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
@@ -404,14 +398,7 @@ QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName)
void MainWindow::switchLayoutDirection()
{
if (layoutDirection() == Qt::LeftToRight)
- qApp->setLayoutDirection(Qt::RightToLeft);
+ QGuiApplication::setLayoutDirection(Qt::RightToLeft);
else
- qApp->setLayoutDirection(Qt::LeftToRight);
-}
-
-void MainWindow::setActiveSubWindow(QWidget *window)
-{
- if (!window)
- return;
- mdiArea->setActiveSubWindow(qobject_cast<QMdiSubWindow *>(window));
+ QGuiApplication::setLayoutDirection(Qt::LeftToRight);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 23:55:41 +0000