--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/tools/plugandpaint/mainwindow.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,310 @@
+/****************************************************************************
+**
+** 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 "interfaces.h"
+#include "mainwindow.h"
+#include "paintarea.h"
+#include "plugindialog.h"
+
+#include <QPluginLoader>
+#include <QTimer>
+
+#include <QScrollArea>
+#include <QMessageBox>
+#include <QActionGroup>
+#include <QAction>
+#include <QMenu>
+#include <QMenuBar>
+#include <QFileDialog>
+#include <QColorDialog>
+#include <QInputDialog>
+#include <QApplication>
+
+MainWindow::MainWindow() :
+ paintArea(new PaintArea),
+ scrollArea(new QScrollArea)
+{
+ scrollArea->setBackgroundRole(QPalette::Dark);
+ scrollArea->setWidget(paintArea);
+ setCentralWidget(scrollArea);
+
+ createActions();
+ createMenus();
+ loadPlugins();
+
+ setWindowTitle(tr("Plug & Paint"));
+
+ if (!brushActionGroup->actions().isEmpty())
+ brushActionGroup->actions().first()->trigger();
+
+ QTimer::singleShot(500, this, SLOT(aboutPlugins()));
+}
+
+void MainWindow::open()
+{
+ const QString fileName = QFileDialog::getOpenFileName(this,
+ tr("Open File"),
+ QDir::currentPath());
+ if (!fileName.isEmpty()) {
+ if (!paintArea->openImage(fileName)) {
+ QMessageBox::information(this, tr("Plug & Paint"),
+ tr("Cannot load %1.").arg(fileName));
+ return;
+ }
+ paintArea->adjustSize();
+ }
+}
+
+bool MainWindow::saveAs()
+{
+ const QString initialPath = QDir::currentPath() + "/untitled.png";
+
+ const QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
+ initialPath);
+ if (fileName.isEmpty()) {
+ return false;
+ } else {
+ return paintArea->saveImage(fileName, "png");
+ }
+}
+
+void MainWindow::brushColor()
+{
+ const QColor newColor = QColorDialog::getColor(paintArea->brushColor());
+ if (newColor.isValid())
+ paintArea->setBrushColor(newColor);
+}
+
+void MainWindow::brushWidth()
+{
+ bool ok;
+ const int newWidth = QInputDialog::getInteger(this, tr("Plug & Paint"),
+ tr("Select brush width:"),
+ paintArea->brushWidth(),
+ 1, 50, 1, &ok);
+ if (ok)
+ paintArea->setBrushWidth(newWidth);
+}
+
+//! [0]
+void MainWindow::changeBrush()
+{
+ QAction *action = qobject_cast<QAction *>(sender());
+ BrushInterface *iBrush = qobject_cast<BrushInterface *>(action->parent());
+ const QString brush = action->text();
+
+ paintArea->setBrush(iBrush, brush);
+}
+//! [0]
+
+//! [1]
+void MainWindow::insertShape()
+{
+ QAction *action = qobject_cast<QAction *>(sender());
+ ShapeInterface *iShape = qobject_cast<ShapeInterface *>(action->parent());
+
+ const QPainterPath path = iShape->generateShape(action->text(), this);
+ if (!path.isEmpty())
+ paintArea->insertShape(path);
+}
+//! [1]
+
+//! [2]
+void MainWindow::applyFilter()
+{
+ QAction *action = qobject_cast<QAction *>(sender());
+ FilterInterface *iFilter =
+ qobject_cast<FilterInterface *>(action->parent());
+
+ const QImage image = iFilter->filterImage(action->text(), paintArea->image(),
+ this);
+ paintArea->setImage(image);
+}
+//! [2]
+
+void MainWindow::about()
+{
+ QMessageBox::about(this, tr("About Plug & Paint"),
+ tr("The <b>Plug & Paint</b> example demonstrates how to write Qt "
+ "applications that can be extended through plugins."));
+}
+
+//! [3]
+void MainWindow::aboutPlugins()
+{
+ PluginDialog dialog(pluginsDir.path(), pluginFileNames, this);
+ dialog.exec();
+}
+//! [3]
+
+void MainWindow::createActions()
+{
+ openAct = new QAction(tr("&Open..."), this);
+ openAct->setShortcuts(QKeySequence::Open);
+ connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+
+ saveAsAct = new QAction(tr("&Save As..."), this);
+ saveAsAct->setShortcuts(QKeySequence::SaveAs);
+ connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
+
+ exitAct = new QAction(tr("E&xit"), this);
+ exitAct->setShortcuts(QKeySequence::Quit);
+ connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+ brushColorAct = new QAction(tr("&Brush Color..."), this);
+ connect(brushColorAct, SIGNAL(triggered()), this, SLOT(brushColor()));
+
+ brushWidthAct = new QAction(tr("&Brush Width..."), this);
+ connect(brushWidthAct, SIGNAL(triggered()), this, SLOT(brushWidth()));
+
+ brushActionGroup = new QActionGroup(this);
+
+ 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()));
+
+ aboutPluginsAct = new QAction(tr("About &Plugins"), this);
+ connect(aboutPluginsAct, SIGNAL(triggered()), this, SLOT(aboutPlugins()));
+}
+
+void MainWindow::createMenus()
+{
+ fileMenu = menuBar()->addMenu(tr("&File"));
+ fileMenu->addAction(openAct);
+ fileMenu->addAction(saveAsAct);
+ fileMenu->addSeparator();
+ fileMenu->addAction(exitAct);
+
+ brushMenu = menuBar()->addMenu(tr("&Brush"));
+ brushMenu->addAction(brushColorAct);
+ brushMenu->addAction(brushWidthAct);
+ brushMenu->addSeparator();
+
+ shapesMenu = menuBar()->addMenu(tr("&Shapes"));
+
+ filterMenu = menuBar()->addMenu(tr("&Filter"));
+
+ menuBar()->addSeparator();
+
+ helpMenu = menuBar()->addMenu(tr("&Help"));
+ helpMenu->addAction(aboutAct);
+ helpMenu->addAction(aboutQtAct);
+ helpMenu->addAction(aboutPluginsAct);
+}
+
+//! [4]
+void MainWindow::loadPlugins()
+{
+ foreach (QObject *plugin, QPluginLoader::staticInstances())
+ populateMenus(plugin);
+//! [4] //! [5]
+
+ pluginsDir = QDir(qApp->applicationDirPath());
+
+#if defined(Q_OS_WIN)
+ if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release")
+ pluginsDir.cdUp();
+#elif defined(Q_OS_MAC)
+ if (pluginsDir.dirName() == "MacOS") {
+ pluginsDir.cdUp();
+ pluginsDir.cdUp();
+ pluginsDir.cdUp();
+ }
+#endif
+ pluginsDir.cd("plugins");
+//! [5]
+
+//! [6]
+ foreach (QString fileName, pluginsDir.entryList(QDir::Files)) {
+ QPluginLoader loader(pluginsDir.absoluteFilePath(fileName));
+ QObject *plugin = loader.instance();
+ if (plugin) {
+ populateMenus(plugin);
+ pluginFileNames += fileName;
+//! [6] //! [7]
+ }
+//! [7] //! [8]
+ }
+//! [8]
+
+//! [9]
+ brushMenu->setEnabled(!brushActionGroup->actions().isEmpty());
+ shapesMenu->setEnabled(!shapesMenu->actions().isEmpty());
+ filterMenu->setEnabled(!filterMenu->actions().isEmpty());
+}
+//! [9]
+
+//! [10]
+void MainWindow::populateMenus(QObject *plugin)
+{
+ BrushInterface *iBrush = qobject_cast<BrushInterface *>(plugin);
+ if (iBrush)
+ addToMenu(plugin, iBrush->brushes(), brushMenu, SLOT(changeBrush()),
+ brushActionGroup);
+
+ ShapeInterface *iShape = qobject_cast<ShapeInterface *>(plugin);
+ if (iShape)
+ addToMenu(plugin, iShape->shapes(), shapesMenu, SLOT(insertShape()));
+
+ FilterInterface *iFilter = qobject_cast<FilterInterface *>(plugin);
+ if (iFilter)
+ addToMenu(plugin, iFilter->filters(), filterMenu, SLOT(applyFilter()));
+}
+//! [10]
+
+void MainWindow::addToMenu(QObject *plugin, const QStringList &texts,
+ QMenu *menu, const char *member,
+ QActionGroup *actionGroup)
+{
+ foreach (QString text, texts) {
+ QAction *action = new QAction(text, plugin);
+ connect(action, SIGNAL(triggered()), this, member);
+ menu->addAction(action);
+
+ if (actionGroup) {
+ action->setCheckable(true);
+ actionGroup->addAction(action);
+ }
+ }
+}