<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>mainwindow.cpp Example File | Qt Widgets 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-tools-plugandpaint-app-example.html">Plug & Paint Example</a></td><td >mainwindow.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">mainwindow.cpp Example File</h1> <span class="subtitle">tools/plugandpaint/app/mainwindow.cpp</span> <!-- $$$tools/plugandpaint/app/mainwindow.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "interfaces.h"</span> <span class="preprocessor">#include "mainwindow.h"</span> <span class="preprocessor">#include "paintarea.h"</span> <span class="preprocessor">#include "plugindialog.h"</span> <span class="preprocessor">#include <QAction></span> <span class="preprocessor">#include <QActionGroup></span> <span class="preprocessor">#include <QApplication></span> <span class="preprocessor">#include <QColorDialog></span> <span class="preprocessor">#include <QFileDialog></span> <span class="preprocessor">#include <QInputDialog></span> <span class="preprocessor">#include <QMenu></span> <span class="preprocessor">#include <QMenuBar></span> <span class="preprocessor">#include <QMessageBox></span> <span class="preprocessor">#include <QPluginLoader></span> <span class="preprocessor">#include <QScrollArea></span> <span class="preprocessor">#include <QTimer></span> MainWindow<span class="operator">::</span>MainWindow() : paintArea(<span class="keyword">new</span> PaintArea)<span class="operator">,</span> scrollArea(<span class="keyword">new</span> <span class="type"><a href="qscrollarea.html">QScrollArea</a></span>) { scrollArea<span class="operator">-</span><span class="operator">></span>setBackgroundRole(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Dark); scrollArea<span class="operator">-</span><span class="operator">></span>setWidget(paintArea); setCentralWidget(scrollArea); createActions(); createMenus(); loadPlugins(); setWindowTitle(tr(<span class="string">"Plug & Paint"</span>)); <span class="keyword">if</span> (<span class="operator">!</span>brushActionGroup<span class="operator">-</span><span class="operator">></span>actions()<span class="operator">.</span>isEmpty()) brushActionGroup<span class="operator">-</span><span class="operator">></span>actions()<span class="operator">.</span>first()<span class="operator">-</span><span class="operator">></span>trigger(); <span class="type"><a href="../qtcore/qtimer.html">QTimer</a></span><span class="operator">::</span>singleShot(<span class="number">500</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>aboutPlugins); } <span class="type">void</span> MainWindow<span class="operator">::</span>open() { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open File"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>currentPath()); <span class="keyword">if</span> (<span class="operator">!</span>fileName<span class="operator">.</span>isEmpty()) { <span class="keyword">if</span> (<span class="operator">!</span>paintArea<span class="operator">-</span><span class="operator">></span>openImage(fileName)) { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Plug & Paint"</span>)<span class="operator">,</span> tr(<span class="string">"Cannot load %1."</span>)<span class="operator">.</span>arg(fileName)); <span class="keyword">return</span>; } paintArea<span class="operator">-</span><span class="operator">></span>adjustSize(); } } bool MainWindow<span class="operator">::</span>saveAs() { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> initialPath <span class="operator">=</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>currentPath() <span class="operator">+</span> <span class="string">"/untitled.png"</span>; <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getSaveFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Save As"</span>)<span class="operator">,</span> initialPath); <span class="keyword">if</span> (fileName<span class="operator">.</span>isEmpty()) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="keyword">return</span> paintArea<span class="operator">-</span><span class="operator">></span>saveImage(fileName<span class="operator">,</span> <span class="string">"png"</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>brushColor() { <span class="keyword">const</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> newColor <span class="operator">=</span> <span class="type"><a href="qcolordialog.html">QColorDialog</a></span><span class="operator">::</span>getColor(paintArea<span class="operator">-</span><span class="operator">></span>brushColor()); <span class="keyword">if</span> (newColor<span class="operator">.</span>isValid()) paintArea<span class="operator">-</span><span class="operator">></span>setBrushColor(newColor); } <span class="type">void</span> MainWindow<span class="operator">::</span>brushWidth() { bool ok; <span class="keyword">const</span> <span class="type">int</span> newWidth <span class="operator">=</span> <span class="type"><a href="qinputdialog.html">QInputDialog</a></span><span class="operator">::</span>getInt(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Plug & Paint"</span>)<span class="operator">,</span> tr(<span class="string">"Select brush width:"</span>)<span class="operator">,</span> paintArea<span class="operator">-</span><span class="operator">></span>brushWidth()<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">50</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="operator">&</span>ok); <span class="keyword">if</span> (ok) paintArea<span class="operator">-</span><span class="operator">></span>setBrushWidth(newWidth); } <span class="type">void</span> MainWindow<span class="operator">::</span>changeBrush() { <span class="keyword">auto</span> action <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span><span class="operator">></span>(sender()); <span class="keyword">auto</span> iBrush <span class="operator">=</span> qobject_cast<span class="operator"><</span>BrushInterface <span class="operator">*</span><span class="operator">></span>(action<span class="operator">-</span><span class="operator">></span>parent()); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> brush <span class="operator">=</span> action<span class="operator">-</span><span class="operator">></span>text(); paintArea<span class="operator">-</span><span class="operator">></span>setBrush(iBrush<span class="operator">,</span> brush); } <span class="type">void</span> MainWindow<span class="operator">::</span>insertShape() { <span class="keyword">auto</span> action <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span><span class="operator">></span>(sender()); <span class="keyword">auto</span> iShape <span class="operator">=</span> qobject_cast<span class="operator"><</span>ShapeInterface <span class="operator">*</span><span class="operator">></span>(action<span class="operator">-</span><span class="operator">></span>parent()); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qpainterpath.html">QPainterPath</a></span> path <span class="operator">=</span> iShape<span class="operator">-</span><span class="operator">></span>generateShape(action<span class="operator">-</span><span class="operator">></span>text()<span class="operator">,</span> <span class="keyword">this</span>); <span class="keyword">if</span> (<span class="operator">!</span>path<span class="operator">.</span>isEmpty()) paintArea<span class="operator">-</span><span class="operator">></span>insertShape(path); } <span class="type">void</span> MainWindow<span class="operator">::</span>applyFilter() { <span class="keyword">auto</span> action <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span><span class="operator">></span>(sender()); <span class="keyword">auto</span> iFilter <span class="operator">=</span> qobject_cast<span class="operator"><</span>FilterInterface <span class="operator">*</span><span class="operator">></span>(action<span class="operator">-</span><span class="operator">></span>parent()); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> image <span class="operator">=</span> iFilter<span class="operator">-</span><span class="operator">></span>filterImage(action<span class="operator">-</span><span class="operator">></span>text()<span class="operator">,</span> paintArea<span class="operator">-</span><span class="operator">></span>image()<span class="operator">,</span> <span class="keyword">this</span>); paintArea<span class="operator">-</span><span class="operator">></span>setImage(image); } <span class="type">void</span> MainWindow<span class="operator">::</span>about() { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>about(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"About Plug & Paint"</span>)<span class="operator">,</span> tr(<span class="string">"The <b>Plug & Paint</b> example demonstrates how to write Qt "</span> <span class="string">"applications that can be extended through plugins."</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>aboutPlugins() { PluginDialog dialog(pluginsDir<span class="operator">.</span>path()<span class="operator">,</span> pluginFileNames<span class="operator">,</span> <span class="keyword">this</span>); dialog<span class="operator">.</span>exec(); } <span class="type">void</span> MainWindow<span class="operator">::</span>createActions() { openAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Open..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); openAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Open); connect(openAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>open); saveAsAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Save As..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); saveAsAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>SaveAs); connect(saveAsAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>saveAs); exitAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"E&xit"</span>)<span class="operator">,</span> <span class="keyword">this</span>); exitAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Quit); connect(exitAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>close); brushColorAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Brush Color..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(brushColorAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>brushColor); brushWidthAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Brush Width..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(brushWidthAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>brushWidth); brushActionGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qactiongroup.html">QActionGroup</a></span>(<span class="keyword">this</span>); aboutAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&About"</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(aboutAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>about); aboutQtAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"About &Qt"</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(aboutQtAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <a href="qapplication.html#qApp">qApp</a><span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>aboutQt); aboutPluginsAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"About &Plugins"</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(aboutPluginsAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>aboutPlugins); } <span class="type">void</span> MainWindow<span class="operator">::</span>createMenus() { fileMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&File"</span>)); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(openAct); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(saveAsAct); fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(exitAct); brushMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Brush"</span>)); brushMenu<span class="operator">-</span><span class="operator">></span>addAction(brushColorAct); brushMenu<span class="operator">-</span><span class="operator">></span>addAction(brushWidthAct); brushMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); shapesMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Shapes"</span>)); filterMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Filter"</span>)); menuBar()<span class="operator">-</span><span class="operator">></span>addSeparator(); helpMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Help"</span>)); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutAct); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutQtAct); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutPluginsAct); } <span class="type">void</span> MainWindow<span class="operator">::</span>loadPlugins() { <span class="keyword">const</span> <span class="keyword">auto</span> staticInstances <span class="operator">=</span> <span class="type"><a href="../qtcore/qpluginloader.html">QPluginLoader</a></span><span class="operator">::</span>staticInstances(); <span class="keyword">for</span> (<span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>plugin : staticInstances) populateMenus(plugin); pluginsDir <span class="operator">=</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span>(<a href="qapplication.html#qApp">qApp</a><span class="operator">-</span><span class="operator">></span>applicationDirPath()); <span class="preprocessor">#if defined(Q_OS_WIN)</span> <span class="keyword">if</span> (pluginsDir<span class="operator">.</span>dirName()<span class="operator">.</span>toLower() <span class="operator">=</span><span class="operator">=</span> <span class="string">"debug"</span> <span class="operator">|</span><span class="operator">|</span> pluginsDir<span class="operator">.</span>dirName()<span class="operator">.</span>toLower() <span class="operator">=</span><span class="operator">=</span> <span class="string">"release"</span>) pluginsDir<span class="operator">.</span>cdUp(); <span class="preprocessor">#elif defined(Q_OS_MAC)</span> <span class="keyword">if</span> (pluginsDir<span class="operator">.</span>dirName() <span class="operator">=</span><span class="operator">=</span> <span class="string">"MacOS"</span>) { pluginsDir<span class="operator">.</span>cdUp(); pluginsDir<span class="operator">.</span>cdUp(); pluginsDir<span class="operator">.</span>cdUp(); } <span class="preprocessor">#endif</span> pluginsDir<span class="operator">.</span>cd(<span class="string">"plugins"</span>); <span class="keyword">const</span> <span class="keyword">auto</span> entryList <span class="operator">=</span> pluginsDir<span class="operator">.</span>entryList(<span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>Files); <span class="keyword">for</span> (<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName : entryList) { <span class="type"><a href="../qtcore/qpluginloader.html">QPluginLoader</a></span> loader(pluginsDir<span class="operator">.</span>absoluteFilePath(fileName)); <span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>plugin <span class="operator">=</span> loader<span class="operator">.</span>instance(); <span class="keyword">if</span> (plugin) { populateMenus(plugin); pluginFileNames <span class="operator">+</span><span class="operator">=</span> fileName; } } brushMenu<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="operator">!</span>brushActionGroup<span class="operator">-</span><span class="operator">></span>actions()<span class="operator">.</span>isEmpty()); shapesMenu<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="operator">!</span>shapesMenu<span class="operator">-</span><span class="operator">></span>actions()<span class="operator">.</span>isEmpty()); filterMenu<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="operator">!</span>filterMenu<span class="operator">-</span><span class="operator">></span>actions()<span class="operator">.</span>isEmpty()); } <span class="type">void</span> MainWindow<span class="operator">::</span>populateMenus(<span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>plugin) { <span class="keyword">auto</span> iBrush <span class="operator">=</span> qobject_cast<span class="operator"><</span>BrushInterface <span class="operator">*</span><span class="operator">></span>(plugin); <span class="keyword">if</span> (iBrush) addToMenu(plugin<span class="operator">,</span> iBrush<span class="operator">-</span><span class="operator">></span>brushes()<span class="operator">,</span> brushMenu<span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>changeBrush<span class="operator">,</span> brushActionGroup); <span class="keyword">auto</span> iShape <span class="operator">=</span> qobject_cast<span class="operator"><</span>ShapeInterface <span class="operator">*</span><span class="operator">></span>(plugin); <span class="keyword">if</span> (iShape) addToMenu(plugin<span class="operator">,</span> iShape<span class="operator">-</span><span class="operator">></span>shapes()<span class="operator">,</span> shapesMenu<span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>insertShape); <span class="keyword">auto</span> iFilter <span class="operator">=</span> qobject_cast<span class="operator"><</span>FilterInterface <span class="operator">*</span><span class="operator">></span>(plugin); <span class="keyword">if</span> (iFilter) addToMenu(plugin<span class="operator">,</span> iFilter<span class="operator">-</span><span class="operator">></span>filters()<span class="operator">,</span> filterMenu<span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>applyFilter); } <span class="type">void</span> MainWindow<span class="operator">::</span>addToMenu(<span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>plugin<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> <span class="operator">&</span>texts<span class="operator">,</span> <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>menu<span class="operator">,</span> Member member<span class="operator">,</span> <span class="type"><a href="qactiongroup.html">QActionGroup</a></span> <span class="operator">*</span>actionGroup) { <span class="keyword">for</span> (<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>text : texts) { <span class="keyword">auto</span> action <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(text<span class="operator">,</span> plugin); connect(action<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> member); menu<span class="operator">-</span><span class="operator">></span>addAction(action); <span class="keyword">if</span> (actionGroup) { action<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); actionGroup<span class="operator">-</span><span class="operator">></span>addAction(action); } } } </pre> </div> <!-- @@@tools/plugandpaint/app/mainwindow.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>