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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the $MODULE$ of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial Usage
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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 "scribblearea.h"
+
+//! [0]
+MainWindow::MainWindow()
+{
+ scribbleArea = new ScribbleArea;
+ setCentralWidget(scribbleArea);
+
+ createActions();
+ createMenus();
+
+ setWindowTitle(tr("Finger Paint"));
+ resize(500, 500);
+}
+//! [0]
+
+//! [1]
+void MainWindow::closeEvent(QCloseEvent *event)
+//! [1] //! [2]
+{
+ if (maybeSave()) {
+ event->accept();
+ } else {
+ event->ignore();
+ }
+}
+//! [2]
+
+//! [3]
+void MainWindow::open()
+//! [3] //! [4]
+{
+ if (maybeSave()) {
+ QString fileName = QFileDialog::getOpenFileName(this,
+ tr("Open File"), QDir::currentPath());
+ if (!fileName.isEmpty())
+ scribbleArea->openImage(fileName);
+ }
+}
+//! [4]
+
+//! [5]
+void MainWindow::save()
+//! [5] //! [6]
+{
+ QAction *action = qobject_cast<QAction *>(sender());
+ QByteArray fileFormat = action->data().toByteArray();
+ saveFile(fileFormat);
+}
+//! [6]
+
+//! [11]
+void MainWindow::about()
+//! [11] //! [12]
+{
+ QMessageBox::about(this, tr("About Scribble"),
+ tr("<p>The <b>Scribble</b> example shows how to use QMainWindow as the "
+ "base widget for an application, and how to reimplement some of "
+ "QWidget's event handlers to receive the events generated for "
+ "the application's widgets:</p><p> We reimplement the mouse event "
+ "handlers to facilitate drawing, the paint event handler to "
+ "update the application and the resize event handler to optimize "
+ "the application's appearance. In addition we reimplement the "
+ "close event handler to intercept the close events before "
+ "terminating the application.</p><p> The example also demonstrates "
+ "how to use QPainter to draw an image in real time, as well as "
+ "to repaint widgets.</p>"));
+}
+//! [12]
+
+//! [13]
+void MainWindow::createActions()
+//! [13] //! [14]
+{
+ openAct = new QAction(tr("&Open..."), this);
+ openAct->setShortcut(tr("Ctrl+O"));
+ connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+
+ foreach (QByteArray format, QImageWriter::supportedImageFormats()) {
+ QString text = tr("%1...").arg(QString(format).toUpper());
+
+ QAction *action = new QAction(text, this);
+ action->setData(format);
+ connect(action, SIGNAL(triggered()), this, SLOT(save()));
+ saveAsActs.append(action);
+ }
+
+ printAct = new QAction(tr("&Print..."), this);
+ connect(printAct, SIGNAL(triggered()), scribbleArea, SLOT(print()));
+
+ exitAct = new QAction(tr("E&xit"), this);
+ exitAct->setShortcut(tr("Ctrl+Q"));
+ connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+ clearScreenAct = new QAction(tr("&Clear Screen"), this);
+ clearScreenAct->setShortcut(tr("Ctrl+L"));
+ connect(clearScreenAct, SIGNAL(triggered()),
+ scribbleArea, SLOT(clearImage()));
+
+ aboutAct = new QAction(tr("&About"), this);
+ connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+ aboutQtAct = new QAction(tr("About &Qt"), this);
+ connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+//! [14]
+
+//! [15]
+void MainWindow::createMenus()
+//! [15] //! [16]
+{
+ saveAsMenu = new QMenu(tr("&Save As"), this);
+ foreach (QAction *action, saveAsActs)
+ saveAsMenu->addAction(action);
+
+ fileMenu = new QMenu(tr("&File"), this);
+ fileMenu->addAction(openAct);
+ fileMenu->addMenu(saveAsMenu);
+ fileMenu->addAction(printAct);
+ fileMenu->addSeparator();
+ fileMenu->addAction(exitAct);
+
+ optionMenu = new QMenu(tr("&Options"), this);
+ optionMenu->addAction(clearScreenAct);
+
+ helpMenu = new QMenu(tr("&Help"), this);
+ helpMenu->addAction(aboutAct);
+ helpMenu->addAction(aboutQtAct);
+
+ menuBar()->addMenu(fileMenu);
+ menuBar()->addMenu(optionMenu);
+ menuBar()->addMenu(helpMenu);
+}
+//! [16]
+
+//! [17]
+bool MainWindow::maybeSave()
+//! [17] //! [18]
+{
+ if (scribbleArea->isModified()) {
+ QMessageBox::StandardButton ret;
+ ret = QMessageBox::warning(this, tr("Scribble"),
+ tr("The image has been modified.\n"
+ "Do you want to save your changes?"),
+ QMessageBox::Save | QMessageBox::Discard
+ | QMessageBox::Cancel);
+ if (ret == QMessageBox::Save) {
+ return saveFile("png");
+ } else if (ret == QMessageBox::Cancel) {
+ return false;
+ }
+ }
+ return true;
+}
+//! [18]
+
+//! [19]
+bool MainWindow::saveFile(const QByteArray &fileFormat)
+//! [19] //! [20]
+{
+ QString initialPath = QDir::currentPath() + "/untitled." + fileFormat;
+
+ QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
+ initialPath,
+ tr("%1 Files (*.%2);;All Files (*)")
+ .arg(QString(fileFormat.toUpper()))
+ .arg(QString(fileFormat)));
+ if (fileName.isEmpty()) {
+ return false;
+ } else {
+ return scribbleArea->saveImage(fileName, fileFormat);
+ }
+}
+//! [20]