--- /dev/null
+/****************************************************************************
+ **
+ ** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
+ **
+ ** This file is part of the documentation of the Qt Toolkit.
+ **
+ ** This file may be used under the terms of the GNU General Public
+** License version 2.0 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 GNU
+** General Public Licensing requirements will be met:
+** http://www.trolltech.com/products/qt/opensource.html
+**
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://www.trolltech.com/products/qt/licensing.html or contact the
+** sales department at sales@trolltech.com.
+ **
+ ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ **
+ ****************************************************************************/
+
+ #include <QtGui>
+
+ #include "mainwindow.h"
+
+ MainWindow::MainWindow()
+ {
+ textEdit = new QTextEdit;
+ setCentralWidget(textEdit);
+
+ createActions();
+ createMenus();
+ createToolBars();
+ createStatusBar();
+
+ readSettings();
+
+ connect(textEdit->document(), SIGNAL(contentsChanged()),
+ this, SLOT(documentWasModified()));
+
+ setCurrentFile("");
+ }
+
+ void MainWindow::closeEvent(QCloseEvent *event)
+ {
+ if (maybeSave()) {
+ writeSettings();
+ event->accept();
+ } else {
+ event->ignore();
+ }
+ }
+
+ void MainWindow::newFile()
+ {
+ if (maybeSave()) {
+ textEdit->clear();
+ setCurrentFile("");
+ }
+ }
+
+ void MainWindow::open()
+ {
+ if (maybeSave()) {
+ QString fileName = QFileDialog::getOpenFileName(this);
+ if (!fileName.isEmpty())
+ loadFile(fileName);
+ }
+ }
+
+ bool MainWindow::save()
+ {
+ if (curFile.isEmpty()) {
+ return saveAs();
+ } else {
+ return saveFile(curFile);
+ }
+ }
+
+ bool MainWindow::saveAs()
+ {
+ QString fileName = QFileDialog::getSaveFileName(this);
+ if (fileName.isEmpty())
+ return false;
+
+ return saveFile(fileName);
+ }
+
+ void MainWindow::about()
+ {
+ QMessageBox::about(this, tr("About Application"),
+ tr("The <b>Application</b> example demonstrates how to "
+ "write modern GUI applications using Qt, with a menu bar, "
+ "toolbars, and a status bar."));
+ }
+
+ void MainWindow::documentWasModified()
+ {
+ setWindowModified(true);
+ }
+
+ void MainWindow::createActions()
+ {
+ newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
+ newAct->setShortcut(tr("Ctrl+N"));
+ 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->setShortcut(tr("Ctrl+O"));
+ 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->setShortcut(tr("Ctrl+S"));
+ saveAct->setStatusTip(tr("Save the document to disk"));
+ connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+ saveAsAct = new QAction(tr("Save &As..."), this);
+ saveAsAct->setStatusTip(tr("Save the document under a new name"));
+ connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
+
+ exitAct = new QAction(tr("E&xit"), this);
+ exitAct->setShortcut(tr("Ctrl+Q"));
+ exitAct->setStatusTip(tr("Exit the application"));
+ connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+ cutAct = new QAction(QIcon(":/images/cut.png"), tr("Cu&t"), this);
+ cutAct->setShortcut(tr("Ctrl+X"));
+ 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->setShortcut(tr("Ctrl+C"));
+ 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->setShortcut(tr("Ctrl+V"));
+ 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)));
+ }
+
+ void MainWindow::createMenus()
+ {
+ fileMenu = menuBar()->addMenu(tr("&File"));
+ fileMenu->addAction(newAct);
+ fileMenu->addAction(openAct);
+ fileMenu->addAction(saveAct);
+ fileMenu->addAction(saveAsAct);
+ fileMenu->addSeparator();
+ 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()
+ {
+ 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", "Application Example");
+ QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
+ QSize size = settings.value("size", QSize(400, 400)).toSize();
+ resize(size);
+ move(pos);
+ }
+
+ void MainWindow::writeSettings()
+ {
+ QSettings settings("Trolltech", "Application Example");
+ settings.setValue("pos", pos());
+ settings.setValue("size", size());
+ }
+
+ bool MainWindow::maybeSave()
+ {
+ if (textEdit->document()->isModified()) {
+ int ret = QMessageBox::warning(this, tr("Application"),
+ tr("The document has been modified.\n"
+ "Do you want to save your changes?"),
+ QMessageBox::Yes | QMessageBox::Default,
+ QMessageBox::No,
+ QMessageBox::Cancel | QMessageBox::Escape);
+ if (ret == QMessageBox::Yes)
+ 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("Application"),
+ 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("Application"),
+ 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)
+ {
+ curFile = fileName;
+ textEdit->document()->setModified(false);
+ setWindowModified(false);
+
+ QString shownName;
+ if (curFile.isEmpty())
+ shownName = "untitled.txt";
+ else
+ shownName = strippedName(curFile);
+
+ setWindowTitle(tr("%1[*] - %2").arg(shownName).arg(tr("Application")));
+ }
+
+ QString MainWindow::strippedName(const QString &fullFileName)
+ {
+ return QFileInfo(fullFileName).fileName();
+ }
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