<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Qt 4.8: view.cpp Example File (demos/chip/view.cpp)</title> <link rel="stylesheet" type="text/css" href="style/style.css" /> <script src="scripts/jquery.js" type="text/javascript"></script> <script src="scripts/functions.js" type="text/javascript"></script> <link rel="stylesheet" type="text/css" href="style/superfish.css" /> <link rel="stylesheet" type="text/css" href="style/narrow.css" /> <!--[if IE]> <meta name="MSSmartTagsPreventParsing" content="true"> <meta http-equiv="imagetoolbar" content="no"> <![endif]--> <!--[if lt IE 7]> <link rel="stylesheet" type="text/css" href="style/style_ie6.css"> <![endif]--> <!--[if IE 7]> <link rel="stylesheet" type="text/css" href="style/style_ie7.css"> <![endif]--> <!--[if IE 8]> <link rel="stylesheet" type="text/css" href="style/style_ie8.css"> <![endif]--> <script src="scripts/superfish.js" type="text/javascript"></script> <script src="scripts/narrow.js" type="text/javascript"></script> </head> <body class="" onload="CheckEmptyAndLoadList();"> <div class="header" id="qtdocheader"> <div class="content"> <div id="nav-logo"> <a href="index.html">Home</a></div> <a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a> <div id="narrowsearch"></div> <div id="nav-topright"> <ul> <li class="nav-topright-home"><a href="http://qt.digia.com/">Qt HOME</a></li> <li class="nav-topright-dev"><a href="http://qt-project.org/">DEV</a></li> <li class="nav-topright-doc nav-topright-doc-active"><a href="http://qt-project.org/doc/"> DOC</a></li> <li class="nav-topright-blog"><a href="http://blog.qt.digia.com/">BLOG</a></li> </ul> </div> <div id="shortCut"> <ul> <li class="shortCut-topleft-inactive"><span><a href="index.html">Qt 4.8</a></span></li> <li class="shortCut-topleft-active"><a href="http://qt-project.org/doc/">ALL VERSIONS </a></li> </ul> </div> <ul class="sf-menu" id="narrowmenu"> <li><a href="#">API Lookup</a> <ul> <li><a href="classes.html">Class index</a></li> <li><a href="functions.html">Function index</a></li> <li><a href="modules.html">Modules</a></li> <li><a href="namespaces.html">Namespaces</a></li> <li><a href="qtglobal.html">Global Declarations</a></li> <li><a href="qdeclarativeelements.html">QML elements</a></li> </ul> </li> <li><a href="#">Qt Topics</a> <ul> <li><a href="qt-basic-concepts.html">Programming with Qt</a></li> <li><a href="qtquick.html">Device UIs & Qt Quick</a></li> <li><a href="qt-gui-concepts.html">UI Design with Qt</a></li> <li><a href="supported-platforms.html">Supported Platforms</a></li> <li><a href="technology-apis.html">Qt and Key Technologies</a></li> <li><a href="best-practices.html">How-To's and Best Practices</a></li> </ul> </li> <li><a href="#">Examples</a> <ul> <li><a href="all-examples.html">Examples</a></li> <li><a href="tutorials.html">Tutorials</a></li> <li><a href="demos.html">Demos</a></li> <li><a href="qdeclarativeexamples.html">QML Examples</a></li> </ul> </li> </ul> </div> </div> <div class="wrapper"> <div class="hd"> <span></span> </div> <div class="bd group"> <div class="sidebar"> <div class="searchlabel"> Search index:</div> <div class="search" id="sidebarsearch"> <form id="qtdocsearch" action="" onsubmit="return false;"> <fieldset> <input type="text" name="searchstring" id="pageType" value="" /> <div id="resultdialog"> <a href="#" id="resultclose">Close</a> <p id="resultlinks" class="all"><a href="#" id="showallresults">All</a> | <a href="#" id="showapiresults">API</a> | <a href="#" id="showarticleresults">Articles</a> | <a href="#" id="showexampleresults">Examples</a></p> <p id="searchcount" class="all"><span id="resultcount"></span><span id="apicount"></span><span id="articlecount"></span><span id="examplecount"></span> results:</p> <ul id="resultlist" class="all"> </ul> </div> </fieldset> </form> </div> <div class="box first bottombar" id="lookup"> <h2 title="API Lookup"><span></span> API Lookup</h2> <div id="list001" class="list"> <ul id="ul001" > <li class="defaultLink"><a href="classes.html">Class index</a></li> <li class="defaultLink"><a href="functions.html">Function index</a></li> <li class="defaultLink"><a href="modules.html">Modules</a></li> <li class="defaultLink"><a href="namespaces.html">Namespaces</a></li> <li class="defaultLink"><a href="qtglobal.html">Global Declarations</a></li> <li class="defaultLink"><a href="qdeclarativeelements.html">QML elements</a></li> </ul> </div> </div> <div class="box bottombar" id="topics"> <h2 title="Qt Topics"><span></span> Qt Topics</h2> <div id="list002" class="list"> <ul id="ul002" > <li class="defaultLink"><a href="qt-basic-concepts.html">Programming with Qt</a></li> <li class="defaultLink"><a href="qtquick.html">Device UIs & Qt Quick</a></li> <li class="defaultLink"><a href="qt-gui-concepts.html">UI Design with Qt</a></li> <li class="defaultLink"><a href="supported-platforms.html">Supported Platforms</a></li> <li class="defaultLink"><a href="technology-apis.html">Qt and Key Technologies</a></li> <li class="defaultLink"><a href="best-practices.html">How-To's and Best Practices</a></li> </ul> </div> </div> <div class="box" id="examples"> <h2 title="Examples"><span></span> Examples</h2> <div id="list003" class="list"> <ul id="ul003"> <li class="defaultLink"><a href="all-examples.html">Examples</a></li> <li class="defaultLink"><a href="tutorials.html">Tutorials</a></li> <li class="defaultLink"><a href="demos.html">Demos</a></li> <li class="defaultLink"><a href="qdeclarativeexamples.html">QML Examples</a></li> </ul> </div> </div> </div> <div class="wrap"> <div class="toolbar"> <div class="breadcrumb toolblock"> <ul> <li class="first"><a href="index.html">Home</a></li> <!-- Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">view.cpp Example File</h1> <span class="small-subtitle">demos/chip/view.cpp</span> <!-- $$$demos/chip/view.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** 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 http://www.qt.io/terms-conditions. For further ** information use the contact form at http://www.qt.io/contact-us. ** ** 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 or version 3 as published by the Free ** Software Foundation and appearing in the file LICENSE.LGPLv21 and ** LICENSE.LGPLv3 included in the packaging of this file. Please review the ** following information to ensure the GNU Lesser General Public License ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** As a special exception, The Qt Company gives you certain additional ** rights. These rights are described in The Qt Company LGPL Exception ** version 1.1, 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. ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "view.h"</span> <span class="preprocessor">#include <QtGui></span> <span class="preprocessor">#ifndef QT_NO_OPENGL</span> <span class="preprocessor">#include <QtOpenGL></span> <span class="preprocessor">#endif</span> <span class="preprocessor">#include <qmath.h></span> <span class="type">void</span> GraphicsView<span class="operator">::</span>wheelEvent(<span class="type"><a href="qwheelevent.html">QWheelEvent</a></span> <span class="operator">*</span>e) { <span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">></span>modifiers() <span class="operator">&</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ControlModifier) { <span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">></span>delta() <span class="operator">></span> <span class="number">0</span>) view<span class="operator">-</span><span class="operator">></span>zoomIn(<span class="number">6</span>); <span class="keyword">else</span> view<span class="operator">-</span><span class="operator">></span>zoomOut(<span class="number">6</span>); e<span class="operator">-</span><span class="operator">></span>accept(); } <span class="keyword">else</span> { <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>wheelEvent(e); } } View<span class="operator">::</span>View(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>name<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qframe.html">QFrame</a></span>(parent) { setFrameStyle(Sunken <span class="operator">|</span> StyledPanel); graphicsView <span class="operator">=</span> <span class="keyword">new</span> GraphicsView(<span class="keyword">this</span>); graphicsView<span class="operator">-</span><span class="operator">></span>setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing<span class="operator">,</span> <span class="keyword">false</span>); graphicsView<span class="operator">-</span><span class="operator">></span>setDragMode(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>RubberBandDrag); graphicsView<span class="operator">-</span><span class="operator">></span>setOptimizationFlags(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>DontSavePainterState); graphicsView<span class="operator">-</span><span class="operator">></span>setViewportUpdateMode(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>SmartViewportUpdate); graphicsView<span class="operator">-</span><span class="operator">></span>setTransformationAnchor(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>AnchorUnderMouse); <span class="type">int</span> size <span class="operator">=</span> style()<span class="operator">-</span><span class="operator">></span>pixelMetric(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>PM_ToolBarIconSize); <span class="type"><a href="qsize.html">QSize</a></span> iconSize(size<span class="operator">,</span> size); <span class="type"><a href="qtoolbutton.html">QToolButton</a></span> <span class="operator">*</span>zoomInIcon <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; zoomInIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeat(<span class="keyword">true</span>); zoomInIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeatInterval(<span class="number">33</span>); zoomInIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeatDelay(<span class="number">0</span>); zoomInIcon<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/zoomin.png"</span>)); zoomInIcon<span class="operator">-</span><span class="operator">></span>setIconSize(iconSize); <span class="type"><a href="qtoolbutton.html">QToolButton</a></span> <span class="operator">*</span>zoomOutIcon <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; zoomOutIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeat(<span class="keyword">true</span>); zoomOutIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeatInterval(<span class="number">33</span>); zoomOutIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeatDelay(<span class="number">0</span>); zoomOutIcon<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/zoomout.png"</span>)); zoomOutIcon<span class="operator">-</span><span class="operator">></span>setIconSize(iconSize); zoomSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>; zoomSlider<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="number">0</span>); zoomSlider<span class="operator">-</span><span class="operator">></span>setMaximum(<span class="number">500</span>); zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">250</span>); zoomSlider<span class="operator">-</span><span class="operator">></span>setTickPosition(<span class="type"><a href="qslider.html">QSlider</a></span><span class="operator">::</span>TicksRight); <span class="comment">// Zoom slider layout</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>zoomSliderLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>; zoomSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(zoomInIcon); zoomSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(zoomSlider); zoomSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(zoomOutIcon); <span class="type"><a href="qtoolbutton.html">QToolButton</a></span> <span class="operator">*</span>rotateLeftIcon <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; rotateLeftIcon<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/rotateleft.png"</span>)); rotateLeftIcon<span class="operator">-</span><span class="operator">></span>setIconSize(iconSize); <span class="type"><a href="qtoolbutton.html">QToolButton</a></span> <span class="operator">*</span>rotateRightIcon <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; rotateRightIcon<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/rotateright.png"</span>)); rotateRightIcon<span class="operator">-</span><span class="operator">></span>setIconSize(iconSize); rotateSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>; rotateSlider<span class="operator">-</span><span class="operator">></span>setOrientation(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal); rotateSlider<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="operator">-</span><span class="number">360</span>); rotateSlider<span class="operator">-</span><span class="operator">></span>setMaximum(<span class="number">360</span>); rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">0</span>); rotateSlider<span class="operator">-</span><span class="operator">></span>setTickPosition(<span class="type"><a href="qslider.html">QSlider</a></span><span class="operator">::</span>TicksBelow); <span class="comment">// Rotate slider layout</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>rotateSliderLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>; rotateSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotateLeftIcon); rotateSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotateSlider); rotateSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotateRightIcon); resetButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; resetButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"0"</span>)); resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); <span class="comment">// Label layout</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>labelLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>; label <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(name); label2 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Pointer Mode"</span>)); selectModeButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; selectModeButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Select"</span>)); selectModeButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); selectModeButton<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>); dragModeButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; dragModeButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Drag"</span>)); dragModeButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); dragModeButton<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">false</span>); antialiasButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; antialiasButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Antialiasing"</span>)); antialiasButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); antialiasButton<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">false</span>); openGlButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; openGlButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"OpenGL"</span>)); openGlButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); <span class="preprocessor">#ifndef QT_NO_OPENGL</span> openGlButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="type"><a href="qglformat.html">QGLFormat</a></span><span class="operator">::</span>hasOpenGL()); <span class="preprocessor">#else</span> openGlButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); <span class="preprocessor">#endif</span> printButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; printButton<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="qicon.html">QIcon</a></span>(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/fileprint.png"</span>))); <span class="type"><a href="qbuttongroup.html">QButtonGroup</a></span> <span class="operator">*</span>pointerModeGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbuttongroup.html">QButtonGroup</a></span>; pointerModeGroup<span class="operator">-</span><span class="operator">></span>setExclusive(<span class="keyword">true</span>); pointerModeGroup<span class="operator">-</span><span class="operator">></span>addButton(selectModeButton); pointerModeGroup<span class="operator">-</span><span class="operator">></span>addButton(dragModeButton); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(label); labelLayout<span class="operator">-</span><span class="operator">></span>addStretch(); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(label2); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(selectModeButton); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(dragModeButton); labelLayout<span class="operator">-</span><span class="operator">></span>addStretch(); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(antialiasButton); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(openGlButton); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(printButton); <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>topLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>; topLayout<span class="operator">-</span><span class="operator">></span>addLayout(labelLayout<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); topLayout<span class="operator">-</span><span class="operator">></span>addWidget(graphicsView<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>); topLayout<span class="operator">-</span><span class="operator">></span>addLayout(zoomSliderLayout<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); topLayout<span class="operator">-</span><span class="operator">></span>addLayout(rotateSliderLayout<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>); topLayout<span class="operator">-</span><span class="operator">></span>addWidget(resetButton<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>); setLayout(topLayout); connect(resetButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(resetView())); connect(zoomSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setupMatrix())); connect(rotateSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setupMatrix())); connect(graphicsView<span class="operator">-</span><span class="operator">></span>verticalScrollBar()<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setResetButtonEnabled())); connect(graphicsView<span class="operator">-</span><span class="operator">></span>horizontalScrollBar()<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setResetButtonEnabled())); connect(selectModeButton<span class="operator">,</span> SIGNAL(toggled(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(togglePointerMode())); connect(dragModeButton<span class="operator">,</span> SIGNAL(toggled(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(togglePointerMode())); connect(antialiasButton<span class="operator">,</span> SIGNAL(toggled(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(toggleAntialiasing())); connect(openGlButton<span class="operator">,</span> SIGNAL(toggled(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(toggleOpenGL())); connect(rotateLeftIcon<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(rotateLeft())); connect(rotateRightIcon<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(rotateRight())); connect(zoomInIcon<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(zoomIn())); connect(zoomOutIcon<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(zoomOut())); connect(printButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(print())); setupMatrix(); } <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span> <span class="operator">*</span>View<span class="operator">::</span>view() <span class="keyword">const</span> { <span class="keyword">return</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span> <span class="operator">*</span><span class="operator">></span>(graphicsView); } <span class="type">void</span> View<span class="operator">::</span>resetView() { zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">250</span>); rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">0</span>); setupMatrix(); graphicsView<span class="operator">-</span><span class="operator">></span>ensureVisible(<span class="type"><a href="qrectf.html">QRectF</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)); resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); } <span class="type">void</span> View<span class="operator">::</span>setResetButtonEnabled() { resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); } <span class="type">void</span> View<span class="operator">::</span>setupMatrix() { <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> scale <span class="operator">=</span> <a href="qtcore-qmath-h.html#qPow">qPow</a>(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">2</span>)<span class="operator">,</span> (zoomSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">-</span> <span class="number">250</span>) <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">50</span>)); <span class="type"><a href="qmatrix.html">QMatrix</a></span> matrix; matrix<span class="operator">.</span>scale(scale<span class="operator">,</span> scale); matrix<span class="operator">.</span>rotate(rotateSlider<span class="operator">-</span><span class="operator">></span>value()); graphicsView<span class="operator">-</span><span class="operator">></span>setMatrix(matrix); setResetButtonEnabled(); } <span class="type">void</span> View<span class="operator">::</span>togglePointerMode() { graphicsView<span class="operator">-</span><span class="operator">></span>setDragMode(selectModeButton<span class="operator">-</span><span class="operator">></span>isChecked() <span class="operator">?</span> <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>RubberBandDrag : <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>ScrollHandDrag); graphicsView<span class="operator">-</span><span class="operator">></span>setInteractive(selectModeButton<span class="operator">-</span><span class="operator">></span>isChecked()); } <span class="type">void</span> View<span class="operator">::</span>toggleOpenGL() { <span class="preprocessor">#ifndef QT_NO_OPENGL</span> graphicsView<span class="operator">-</span><span class="operator">></span>setViewport(openGlButton<span class="operator">-</span><span class="operator">></span>isChecked() <span class="operator">?</span> <span class="keyword">new</span> <span class="type"><a href="qglwidget.html">QGLWidget</a></span>(<span class="type"><a href="qglformat.html">QGLFormat</a></span>(QGL<span class="operator">::</span>SampleBuffers)) : <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>); <span class="preprocessor">#endif</span> } <span class="type">void</span> View<span class="operator">::</span>toggleAntialiasing() { graphicsView<span class="operator">-</span><span class="operator">></span>setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing<span class="operator">,</span> antialiasButton<span class="operator">-</span><span class="operator">></span>isChecked()); } <span class="type">void</span> View<span class="operator">::</span>print() { <span class="preprocessor">#ifndef QT_NO_PRINTER</span> <span class="type"><a href="qprinter.html">QPrinter</a></span> printer; <span class="type"><a href="qprintdialog.html">QPrintDialog</a></span> dialog(<span class="operator">&</span>printer<span class="operator">,</span> <span class="keyword">this</span>); <span class="keyword">if</span> (dialog<span class="operator">.</span>exec() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted) { <span class="type"><a href="qpainter.html">QPainter</a></span> painter(<span class="operator">&</span>printer); graphicsView<span class="operator">-</span><span class="operator">></span>render(<span class="operator">&</span>painter); } <span class="preprocessor">#endif</span> } <span class="type">void</span> View<span class="operator">::</span>zoomIn(<span class="type">int</span> level) { zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(zoomSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">+</span> level); } <span class="type">void</span> View<span class="operator">::</span>zoomOut(<span class="type">int</span> level) { zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(zoomSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">-</span> level); } <span class="type">void</span> View<span class="operator">::</span>rotateLeft() { rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(rotateSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">-</span> <span class="number">10</span>); } <span class="type">void</span> View<span class="operator">::</span>rotateRight() { rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(rotateSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">+</span> <span class="number">10</span>); }</pre> </div> <!-- @@@demos/chip/view.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> 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.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> 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. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>