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Diffstat (limited to 'examples/mainwindows/mdi/mainwindow.cpp')
| -rw-r--r-- | examples/mainwindows/mdi/mainwindow.cpp | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/examples/mainwindows/mdi/mainwindow.cpp b/examples/mainwindows/mdi/mainwindow.cpp new file mode 100644 index 0000000..49f9b21 --- /dev/null +++ b/examples/mainwindows/mdi/mainwindow.cpp @@ -0,0 +1,399 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#include "mainwindow.h" +#include "mdichild.h" + +MainWindow::MainWindow() +{ + 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 *))); + + createActions(); + createMenus(); + createToolBars(); + createStatusBar(); + updateMenus(); + + readSettings(); + + setWindowTitle(tr("MDI")); + setUnifiedTitleAndToolBarOnMac(true); +} + +void MainWindow::closeEvent(QCloseEvent *event) +{ + mdiArea->closeAllSubWindows(); + if (activeMdiChild()) { + event->ignore(); + } else { + writeSettings(); + event->accept(); + } +} + +void MainWindow::newFile() +{ + MdiChild *child = createMdiChild(); + child->newFile(); + child->show(); +} + +void MainWindow::open() +{ + QString fileName = QFileDialog::getOpenFileName(this); + if (!fileName.isEmpty()) { + QMdiSubWindow *existing = findMdiChild(fileName); + if (existing) { + mdiArea->setActiveSubWindow(existing); + return; + } + + MdiChild *child = createMdiChild(); + if (child->loadFile(fileName)) { + statusBar()->showMessage(tr("File loaded"), 2000); + child->show(); + } else { + child->close(); + } + } +} + +void MainWindow::save() +{ + if (activeMdiChild() && activeMdiChild()->save()) + statusBar()->showMessage(tr("File saved"), 2000); +} + +void MainWindow::saveAs() +{ + if (activeMdiChild() && activeMdiChild()->saveAs()) + statusBar()->showMessage(tr("File saved"), 2000); +} + +void MainWindow::cut() +{ + if (activeMdiChild()) + activeMdiChild()->cut(); +} + +void MainWindow::copy() +{ + if (activeMdiChild()) + activeMdiChild()->copy(); +} + +void MainWindow::paste() +{ + if (activeMdiChild()) + activeMdiChild()->paste(); +} + +void MainWindow::about() +{ + QMessageBox::about(this, tr("About MDI"), + tr("The <b>MDI</b> example demonstrates how to write multiple " + "document interface applications using Qt.")); +} + +void MainWindow::updateMenus() +{ + bool hasMdiChild = (activeMdiChild() != 0); + saveAct->setEnabled(hasMdiChild); + saveAsAct->setEnabled(hasMdiChild); + pasteAct->setEnabled(hasMdiChild); + closeAct->setEnabled(hasMdiChild); + closeAllAct->setEnabled(hasMdiChild); + tileAct->setEnabled(hasMdiChild); + cascadeAct->setEnabled(hasMdiChild); + nextAct->setEnabled(hasMdiChild); + previousAct->setEnabled(hasMdiChild); + separatorAct->setVisible(hasMdiChild); + + bool hasSelection = (activeMdiChild() && + activeMdiChild()->textCursor().hasSelection()); + cutAct->setEnabled(hasSelection); + copyAct->setEnabled(hasSelection); +} + +void MainWindow::updateWindowMenu() +{ + windowMenu->clear(); + windowMenu->addAction(closeAct); + windowMenu->addAction(closeAllAct); + windowMenu->addSeparator(); + windowMenu->addAction(tileAct); + windowMenu->addAction(cascadeAct); + windowMenu->addSeparator(); + windowMenu->addAction(nextAct); + windowMenu->addAction(previousAct); + windowMenu->addAction(separatorAct); + + QList<QMdiSubWindow *> windows = mdiArea->subWindowList(); + separatorAct->setVisible(!windows.isEmpty()); + + for (int i = 0; i < windows.size(); ++i) { + MdiChild *child = qobject_cast<MdiChild *>(windows.at(i)->widget()); + + QString text; + if (i < 9) { + text = tr("&%1 %2").arg(i + 1) + .arg(child->userFriendlyCurrentFile()); + } else { + text = tr("%1 %2").arg(i + 1) + .arg(child->userFriendlyCurrentFile()); + } + QAction *action = windowMenu->addAction(text); + action->setCheckable(true); + action ->setChecked(child == activeMdiChild()); + connect(action, SIGNAL(triggered()), windowMapper, SLOT(map())); + windowMapper->setMapping(action, windows.at(i)); + } +} + +MdiChild *MainWindow::createMdiChild() +{ + MdiChild *child = new MdiChild; + mdiArea->addSubWindow(child); + + connect(child, SIGNAL(copyAvailable(bool)), + cutAct, SLOT(setEnabled(bool))); + connect(child, SIGNAL(copyAvailable(bool)), + copyAct, SLOT(setEnabled(bool))); + + return child; +} + +void MainWindow::createActions() +{ + newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this); + newAct->setShortcuts(QKeySequence::New); + newAct->setStatusTip(tr("Create a new file")); + connect(newAct, SIGNAL(triggered()), this, SLOT(newFile())); + + openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this); + openAct->setShortcuts(QKeySequence::Open); + openAct->setStatusTip(tr("Open an existing file")); + connect(openAct, SIGNAL(triggered()), this, SLOT(open())); + + saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save"), this); + saveAct->setShortcuts(QKeySequence::Save); + saveAct->setStatusTip(tr("Save the document to disk")); + connect(saveAct, SIGNAL(triggered()), this, SLOT(save())); + + saveAsAct = new QAction(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())); + +//! [0] + exitAct = new QAction(tr("E&xit"), this); + exitAct->setShortcut(tr("Ctrl+Q")); + exitAct->setStatusTip(tr("Exit the application")); + connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows())); +//! [0] + + cutAct = new QAction(QIcon(":/images/cut.png"), 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())); + + copyAct = new QAction(QIcon(":/images/copy.png"), 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())); + + pasteAct = new QAction(QIcon(":/images/paste.png"), 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())); + + closeAct = new QAction(tr("Cl&ose"), this); + closeAct->setShortcut(tr("Ctrl+F4")); + closeAct->setStatusTip(tr("Close the active window")); + connect(closeAct, SIGNAL(triggered()), + mdiArea, SLOT(closeActiveSubWindow())); + + closeAllAct = new QAction(tr("Close &All"), this); + closeAllAct->setStatusTip(tr("Close all the windows")); + connect(closeAllAct, SIGNAL(triggered()), + mdiArea, SLOT(closeAllSubWindows())); + + tileAct = new QAction(tr("&Tile"), this); + tileAct->setStatusTip(tr("Tile the windows")); + connect(tileAct, SIGNAL(triggered()), mdiArea, SLOT(tileSubWindows())); + + cascadeAct = new QAction(tr("&Cascade"), this); + cascadeAct->setStatusTip(tr("Cascade the windows")); + connect(cascadeAct, SIGNAL(triggered()), mdiArea, SLOT(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())); + + 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); + + editMenu = menuBar()->addMenu(tr("&Edit")); + editMenu->addAction(cutAct); + editMenu->addAction(copyAct); + editMenu->addAction(pasteAct); + + 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); +} + +void MainWindow::createToolBars() +{ + fileToolBar = addToolBar(tr("File")); + fileToolBar->addAction(newAct); + fileToolBar->addAction(openAct); + fileToolBar->addAction(saveAct); + + editToolBar = addToolBar(tr("Edit")); + editToolBar->addAction(cutAct); + editToolBar->addAction(copyAct); + editToolBar->addAction(pasteAct); +} + +void MainWindow::createStatusBar() +{ + statusBar()->showMessage(tr("Ready")); +} + +void MainWindow::readSettings() +{ + QSettings settings("Trolltech", "MDI Example"); + QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint(); + QSize size = settings.value("size", QSize(400, 400)).toSize(); + move(pos); + resize(size); +} + +void MainWindow::writeSettings() +{ + QSettings settings("Trolltech", "MDI Example"); + settings.setValue("pos", pos()); + settings.setValue("size", size()); +} + +MdiChild *MainWindow::activeMdiChild() +{ + if (QMdiSubWindow *activeSubWindow = mdiArea->activeSubWindow()) + return qobject_cast<MdiChild *>(activeSubWindow->widget()); + return 0; +} + +QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName) +{ + QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath(); + + foreach (QMdiSubWindow *window, mdiArea->subWindowList()) { + MdiChild *mdiChild = qobject_cast<MdiChild *>(window->widget()); + if (mdiChild->currentFile() == canonicalFilePath) + return window; + } + return 0; +} + +void MainWindow::switchLayoutDirection() +{ + if (layoutDirection() == Qt::LeftToRight) + qApp->setLayoutDirection(Qt::RightToLeft); + else + qApp->setLayoutDirection(Qt::LeftToRight); +} + +void MainWindow::setActiveSubWindow(QWidget *window) +{ + if (!window) + return; + mdiArea->setActiveSubWindow(qobject_cast<QMdiSubWindow *>(window)); +} |