--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/mainwindows/sdi/mainwindow.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,373 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+ init();
+ setCurrentFile("");
+}
+
+MainWindow::MainWindow(const QString &fileName)
+{
+ init();
+ loadFile(fileName);
+}
+
+void MainWindow::closeEvent(QCloseEvent *event)
+{
+ if (maybeSave()) {
+ writeSettings();
+ event->accept();
+ } else {
+ event->ignore();
+ }
+}
+
+void MainWindow::newFile()
+{
+ MainWindow *other = new MainWindow;
+ other->move(x() + 40, y() + 40);
+ other->show();
+}
+
+void MainWindow::open()
+{
+ QString fileName = QFileDialog::getOpenFileName(this);
+ if (!fileName.isEmpty()) {
+ MainWindow *existing = findMainWindow(fileName);
+ if (existing) {
+ existing->show();
+ existing->raise();
+ existing->activateWindow();
+ return;
+ }
+
+ if (isUntitled && textEdit->document()->isEmpty()
+ && !isWindowModified()) {
+ loadFile(fileName);
+ } else {
+ MainWindow *other = new MainWindow(fileName);
+ if (other->isUntitled) {
+ delete other;
+ return;
+ }
+ other->move(x() + 40, y() + 40);
+ other->show();
+ }
+ }
+}
+
+bool MainWindow::save()
+{
+ if (isUntitled) {
+ return saveAs();
+ } else {
+ return saveFile(curFile);
+ }
+}
+
+bool MainWindow::saveAs()
+{
+ QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
+ curFile);
+ if (fileName.isEmpty())
+ return false;
+
+ return saveFile(fileName);
+}
+
+void MainWindow::about()
+{
+ QMessageBox::about(this, tr("About SDI"),
+ tr("The <b>SDI</b> example demonstrates how to write single "
+ "document interface applications using Qt."));
+}
+
+void MainWindow::documentWasModified()
+{
+ setWindowModified(true);
+}
+
+void MainWindow::init()
+{
+ setAttribute(Qt::WA_DeleteOnClose);
+
+ isUntitled = true;
+
+ textEdit = new QTextEdit;
+ setCentralWidget(textEdit);
+
+ createActions();
+ createMenus();
+ createToolBars();
+ createStatusBar();
+
+ readSettings();
+
+ connect(textEdit->document(), SIGNAL(contentsChanged()),
+ this, SLOT(documentWasModified()));
+
+ setUnifiedTitleAndToolBarOnMac(true);
+}
+
+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()));
+
+ closeAct = new QAction(tr("&Close"), this);
+ closeAct->setShortcut(tr("Ctrl+W"));
+ closeAct->setStatusTip(tr("Close this window"));
+ connect(closeAct, SIGNAL(triggered()), this, SLOT(close()));
+
+ exitAct = new QAction(tr("E&xit"), this);
+ exitAct->setShortcuts(QKeySequence::Quit);
+ exitAct->setStatusTip(tr("Exit the application"));
+ connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
+
+ 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()), textEdit, 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()), textEdit, 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()), textEdit, SLOT(paste()));
+
+ 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()));
+
+
+ cutAct->setEnabled(false);
+ copyAct->setEnabled(false);
+ connect(textEdit, SIGNAL(copyAvailable(bool)),
+ cutAct, SLOT(setEnabled(bool)));
+ connect(textEdit, SIGNAL(copyAvailable(bool)),
+ copyAct, SLOT(setEnabled(bool)));
+}
+
+//! [implicit tr context]
+void MainWindow::createMenus()
+{
+ fileMenu = menuBar()->addMenu(tr("&File"));
+//! [implicit tr context]
+ fileMenu->addAction(newAct);
+ fileMenu->addAction(openAct);
+ fileMenu->addAction(saveAct);
+ fileMenu->addAction(saveAsAct);
+ fileMenu->addSeparator();
+ fileMenu->addAction(closeAct);
+ fileMenu->addAction(exitAct);
+
+ editMenu = menuBar()->addMenu(tr("&Edit"));
+ editMenu->addAction(cutAct);
+ editMenu->addAction(copyAct);
+ editMenu->addAction(pasteAct);
+
+ menuBar()->addSeparator();
+
+ helpMenu = menuBar()->addMenu(tr("&Help"));
+ helpMenu->addAction(aboutAct);
+ helpMenu->addAction(aboutQtAct);
+}
+
+void MainWindow::createToolBars()
+{
+//! [0]
+ fileToolBar = addToolBar(tr("File"));
+ fileToolBar->addAction(newAct);
+ fileToolBar->addAction(openAct);
+//! [0]
+ 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;
+ 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;
+ settings.setValue("pos", pos());
+ settings.setValue("size", size());
+}
+
+bool MainWindow::maybeSave()
+{
+ if (textEdit->document()->isModified()) {
+ QMessageBox::StandardButton ret;
+ ret = QMessageBox::warning(this, tr("SDI"),
+ tr("The document has been modified.\n"
+ "Do you want to save your changes?"),
+ QMessageBox::Save | QMessageBox::Discard
+ | QMessageBox::Cancel);
+ if (ret == QMessageBox::Save)
+ return save();
+ else if (ret == QMessageBox::Cancel)
+ return false;
+ }
+ return true;
+}
+
+void MainWindow::loadFile(const QString &fileName)
+{
+
+ QFile file(fileName);
+ if (!file.open(QFile::ReadOnly | QFile::Text)) {
+ QMessageBox::warning(this, tr("SDI"),
+ 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);
+}
+
+bool MainWindow::saveFile(const QString &fileName)
+{
+ QFile file(fileName);
+ if (!file.open(QFile::WriteOnly | QFile::Text)) {
+ QMessageBox::warning(this, tr("SDI"),
+ tr("Cannot write file %1:\n%2.")
+ .arg(fileName)
+ .arg(file.errorString()));
+ return false;
+ }
+
+ QTextStream out(&file);
+ QApplication::setOverrideCursor(Qt::WaitCursor);
+ out << textEdit->toPlainText();
+ QApplication::restoreOverrideCursor();
+
+ setCurrentFile(fileName);
+ statusBar()->showMessage(tr("File saved"), 2000);
+ return true;
+}
+
+void MainWindow::setCurrentFile(const QString &fileName)
+{
+ static int sequenceNumber = 1;
+
+ isUntitled = fileName.isEmpty();
+ if (isUntitled) {
+ curFile = tr("document%1.txt").arg(sequenceNumber++);
+ } else {
+ curFile = QFileInfo(fileName).canonicalFilePath();
+ }
+
+ textEdit->document()->setModified(false);
+ setWindowModified(false);
+ setWindowFilePath(curFile);
+}
+
+QString MainWindow::strippedName(const QString &fullFileName)
+{
+ return QFileInfo(fullFileName).fileName();
+}
+
+MainWindow *MainWindow::findMainWindow(const QString &fileName)
+{
+ QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
+
+ foreach (QWidget *widget, qApp->topLevelWidgets()) {
+ MainWindow *mainWin = qobject_cast<MainWindow *>(widget);
+ if (mainWin && mainWin->curFile == canonicalFilePath)
+ return mainWin;
+ }
+ return 0;
+}