2b75c156b6
Change-Id: I6441ff931dbd33b698d762e6f6784898f3f60fe7 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
418 lines
13 KiB
C++
418 lines
13 KiB
C++
/****************************************************************************
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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
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** 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
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** 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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**
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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
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** 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 <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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{
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mdiArea = new QMdiArea;
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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, SIGNAL(subWindowActivated(QMdiSubWindow*)),
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this, SLOT(updateMenus()));
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windowMapper = new QSignalMapper(this);
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connect(windowMapper, SIGNAL(mapped(QWidget*)),
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this, SLOT(setActiveSubWindow(QWidget*)));
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createActions();
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createMenus();
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createToolBars();
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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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QString fileName = QFileDialog::getOpenFileName(this);
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if (!fileName.isEmpty()) {
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QMdiSubWindow *existing = findMdiChild(fileName);
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if (existing) {
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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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}
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bool MainWindow::openFile(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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return succeeded;
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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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if (activeMdiChild() && activeMdiChild()->saveAs())
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statusBar()->showMessage(tr("File saved"), 2000);
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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() != 0);
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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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separatorAct->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(separatorAct);
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QList<QMdiSubWindow *> windows = mdiArea->subWindowList();
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separatorAct->setVisible(!windows.isEmpty());
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for (int i = 0; i < windows.size(); ++i) {
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MdiChild *child = qobject_cast<MdiChild *>(windows.at(i)->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);
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action->setCheckable(true);
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action ->setChecked(child == activeMdiChild());
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connect(action, SIGNAL(triggered()), windowMapper, SLOT(map()));
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windowMapper->setMapping(action, windows.at(i));
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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, SIGNAL(copyAvailable(bool)),
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cutAct, SLOT(setEnabled(bool)));
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connect(child, SIGNAL(copyAvailable(bool)),
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copyAct, SLOT(setEnabled(bool)));
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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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newAct = new QAction(QIcon(":/images/new.png"), 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(QIcon(":/images/open.png"), 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(QIcon(":/images/save.png"), 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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//! [0]
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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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//! [0]
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#ifndef QT_NO_CLIPBOARD
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cutAct = new QAction(QIcon(":/images/cut.png"), 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, SIGNAL(triggered()), this, SLOT(cut()));
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copyAct = new QAction(QIcon(":/images/copy.png"), 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, SIGNAL(triggered()), this, SLOT(copy()));
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pasteAct = new QAction(QIcon(":/images/paste.png"), 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, SIGNAL(triggered()), this, SLOT(paste()));
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#endif
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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, SIGNAL(triggered()),
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mdiArea, SLOT(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, SIGNAL(triggered()),
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mdiArea, SLOT(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, SIGNAL(triggered()), mdiArea, SLOT(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, SIGNAL(triggered()), mdiArea, SLOT(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, SIGNAL(triggered()),
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mdiArea, SLOT(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, SIGNAL(triggered()),
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mdiArea, SLOT(activatePreviousSubWindow()));
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separatorAct = new QAction(this);
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separatorAct->setSeparator(true);
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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);
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fileMenu->addSeparator();
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QAction *action = fileMenu->addAction(tr("Switch layout direction"));
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connect(action, SIGNAL(triggered()), this, SLOT(switchLayoutDirection()));
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fileMenu->addAction(exitAct);
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editMenu = menuBar()->addMenu(tr("&Edit"));
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#ifndef QT_NO_CLIPBOARD
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editMenu->addAction(cutAct);
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editMenu->addAction(copyAct);
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editMenu->addAction(pasteAct);
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#endif
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windowMenu = menuBar()->addMenu(tr("&Window"));
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updateWindowMenu();
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connect(windowMenu, SIGNAL(aboutToShow()), this, SLOT(updateWindowMenu()));
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menuBar()->addSeparator();
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helpMenu = menuBar()->addMenu(tr("&Help"));
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helpMenu->addAction(aboutAct);
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helpMenu->addAction(aboutQtAct);
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}
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void MainWindow::createToolBars()
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{
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fileToolBar = addToolBar(tr("File"));
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fileToolBar->addAction(newAct);
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fileToolBar->addAction(openAct);
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fileToolBar->addAction(saveAct);
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#ifndef QT_NO_CLIPBOARD
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editToolBar = addToolBar(tr("Edit"));
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editToolBar->addAction(cutAct);
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editToolBar->addAction(copyAct);
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editToolBar->addAction(pasteAct);
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#endif
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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("QtProject", "MDI Example");
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QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
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QSize size = settings.value("size", QSize(400, 400)).toSize();
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move(pos);
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resize(size);
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}
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void MainWindow::writeSettings()
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{
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QSettings settings("QtProject", "MDI Example");
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settings.setValue("pos", pos());
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settings.setValue("size", size());
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}
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MdiChild *MainWindow::activeMdiChild()
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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 0;
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}
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QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName)
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{
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QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
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foreach (QMdiSubWindow *window, mdiArea->subWindowList()) {
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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 0;
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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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qApp->setLayoutDirection(Qt::RightToLeft);
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else
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qApp->setLayoutDirection(Qt::LeftToRight);
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}
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void MainWindow::setActiveSubWindow(QWidget *window)
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{
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if (!window)
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return;
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mdiArea->setActiveSubWindow(qobject_cast<QMdiSubWindow *>(window));
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}
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