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diff --git a/examples/widgets/tools/plugandpaint/app/mainwindow.cpp b/examples/widgets/tools/plugandpaint/app/mainwindow.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of The Qt Company Ltd nor the names of its
-** contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-
-#include "mainwindow.h"
-#include "interfaces.h"
-#include "paintarea.h"
-#include "plugindialog.h"
-
-#include <QAction>
-#include <QActionGroup>
-#include <QApplication>
-#include <QColorDialog>
-#include <QFileDialog>
-#include <QInputDialog>
-#include <QMenu>
-#include <QMenuBar>
-#include <QMessageBox>
-#include <QPluginLoader>
-#include <QScrollArea>
-#include <QTimer>
-
-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, &MainWindow::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;
-
- 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::getInt(this, tr("Plug & Paint"),
- tr("Select brush width:"),
- paintArea->brushWidth(),
- 1, 50, 1, &ok);
- if (ok)
- paintArea->setBrushWidth(newWidth);
-}
-
-//! [0]
-void MainWindow::changeBrush()
-{
- auto action = qobject_cast<QAction *>(sender());
- if (!action)
- return;
- auto iBrush = qobject_cast<BrushInterface *>(action->parent());
- if (!iBrush)
- return;
- const QString brush = action->text();
-
- paintArea->setBrush(iBrush, brush);
-}
-//! [0]
-
-//! [1]
-void MainWindow::insertShape()
-{
- auto action = qobject_cast<QAction *>(sender());
- if (!action)
- return;
- auto iShape = qobject_cast<ShapeInterface *>(action->parent());
- if (!iShape)
- return;
-
- const QPainterPath path = iShape->generateShape(action->text(), this);
- if (!path.isEmpty())
- paintArea->insertShape(path);
-}
-//! [1]
-
-//! [2]
-void MainWindow::applyFilter()
-{
- auto action = qobject_cast<QAction *>(sender());
- if (!action)
- return;
- auto iFilter = qobject_cast<FilterInterface *>(action->parent());
- if (!iFilter)
- return;
-
- 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, &QAction::triggered, this, &MainWindow::open);
-
- saveAsAct = new QAction(tr("&Save As..."), this);
- saveAsAct->setShortcuts(QKeySequence::SaveAs);
- connect(saveAsAct, &QAction::triggered, this, &MainWindow::saveAs);
-
- exitAct = new QAction(tr("E&xit"), this);
- exitAct->setShortcuts(QKeySequence::Quit);
- connect(exitAct, &QAction::triggered, this, &MainWindow::close);
-
- brushColorAct = new QAction(tr("&Brush Color..."), this);
- connect(brushColorAct, &QAction::triggered, this, &MainWindow::brushColor);
-
- brushWidthAct = new QAction(tr("&Brush Width..."), this);
- connect(brushWidthAct, &QAction::triggered, this, &MainWindow::brushWidth);
-
- brushActionGroup = new QActionGroup(this);
-
- aboutAct = new QAction(tr("&About"), this);
- connect(aboutAct, &QAction::triggered, this, &MainWindow::about);
-
- aboutQtAct = new QAction(tr("About &Qt"), this);
- connect(aboutQtAct, &QAction::triggered, qApp, &QApplication::aboutQt);
-
- aboutPluginsAct = new QAction(tr("About &Plugins"), this);
- connect(aboutPluginsAct, &QAction::triggered, this, &MainWindow::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()
-{
- const auto staticInstances = QPluginLoader::staticInstances();
- for (QObject *plugin : staticInstances)
- populateMenus(plugin);
-//! [4] //! [5]
-
- pluginsDir = QDir(QCoreApplication::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]
- const auto entryList = pluginsDir.entryList(QDir::Files);
- for (const QString &fileName : entryList) {
- 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)
-{
- auto iBrush = qobject_cast<BrushInterface *>(plugin);
- if (iBrush)
- addToMenu(plugin, iBrush->brushes(), brushMenu, &MainWindow::changeBrush,
- brushActionGroup);
-
- auto iShape = qobject_cast<ShapeInterface *>(plugin);
- if (iShape)
- addToMenu(plugin, iShape->shapes(), shapesMenu, &MainWindow::insertShape);
-
- auto iFilter = qobject_cast<FilterInterface *>(plugin);
- if (iFilter)
- addToMenu(plugin, iFilter->filters(), filterMenu, &MainWindow::applyFilter);
-}
-//! [10]
-
-void MainWindow::addToMenu(QObject *plugin, const QStringList &texts,
- QMenu *menu, Member member,
- QActionGroup *actionGroup)
-{
- for (const QString &text : texts) {
- auto action = new QAction(text, plugin);
- connect(action, &QAction::triggered, this, member);
- menu->addAction(action);
-
- if (actionGroup) {
- action->setCheckable(true);
- actionGroup->addAction(action);
- }
- }
-}