5635823e17
As in the past, to avoid rewriting various autotests that contain line-number information, an extra blank line has been inserted at the end of the license text to ensure that this commit does not change the total number of lines in the license header. Change-Id: I311e001373776812699d6efc045b5f742890c689 Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
398 lines
13 KiB
C++
398 lines
13 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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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 Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** 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
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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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MdiChild *child = createMdiChild();
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if (child->loadFile(fileName)) {
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statusBar()->showMessage(tr("File loaded"), 2000);
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child->show();
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} else {
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child->close();
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}
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}
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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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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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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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pasteAct->setEnabled(hasMdiChild);
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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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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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}
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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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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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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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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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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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editMenu->addAction(cutAct);
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editMenu->addAction(copyAct);
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editMenu->addAction(pasteAct);
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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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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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}
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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("Trolltech", "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("Trolltech", "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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