<?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: context2d.h Example File (script/context2d/context2d.h)</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">context2d.h Example File</h1> <span class="small-subtitle">script/context2d/context2d.h</span> <!-- $$$script/context2d/context2d.h-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 Digia Plc and its Subsidiary(-ies) 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">#ifndef CONTEXT2D_H</span> <span class="preprocessor">#define CONTEXT2D_H</span> <span class="preprocessor">#include "domimage.h"</span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QPainterPath></span> <span class="preprocessor">#include <QString></span> <span class="preprocessor">#include <QStack></span> <span class="preprocessor">#include <QMetaType></span> <span class="preprocessor">#include <QTimerEvent></span> <span class="comment">// [3]</span> <span class="keyword">class</span> CanvasGradient { <span class="keyword">public</span>: CanvasGradient(<span class="keyword">const</span> <span class="type"><a href="qgradient.html">QGradient</a></span> <span class="operator">&</span>v) : value(v) {} CanvasGradient() {} <span class="type"><a href="qgradient.html">QGradient</a></span> value; }; <span class="comment">// [3]</span> <a href="qmetatype.html#Q_DECLARE_METATYPE">Q_DECLARE_METATYPE</a>(CanvasGradient) <a href="qmetatype.html#Q_DECLARE_METATYPE">Q_DECLARE_METATYPE</a>(CanvasGradient<span class="operator">*</span>) <span class="keyword">class</span> ImageData { }; <span class="keyword">class</span> QContext2DCanvas; <span class="keyword">class</span> Context2D : <span class="keyword">public</span> <span class="type"><a href="qobject.html">QObject</a></span> { Q_OBJECT <span class="comment">// compositing</span> Q_PROPERTY(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> globalAlpha READ globalAlpha WRITE setGlobalAlpha) Q_PROPERTY(<span class="type"><a href="qstring.html">QString</a></span> globalCompositeOperation READ globalCompositeOperation WRITE setGlobalCompositeOperation) Q_PROPERTY(<span class="type"><a href="qvariant.html">QVariant</a></span> strokeStyle READ strokeStyle WRITE setStrokeStyle) Q_PROPERTY(<span class="type"><a href="qvariant.html">QVariant</a></span> fillStyle READ fillStyle WRITE setFillStyle) <span class="comment">// line caps/joins</span> Q_PROPERTY(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> lineWidth READ lineWidth WRITE setLineWidth) Q_PROPERTY(<span class="type"><a href="qstring.html">QString</a></span> lineCap READ lineCap WRITE setLineCap) Q_PROPERTY(<span class="type"><a href="qstring.html">QString</a></span> lineJoin READ lineJoin WRITE setLineJoin) Q_PROPERTY(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> miterLimit READ miterLimit WRITE setMiterLimit) <span class="comment">// shadows</span> Q_PROPERTY(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowOffsetX READ shadowOffsetX WRITE setShadowOffsetX) Q_PROPERTY(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowOffsetY READ shadowOffsetY WRITE setShadowOffsetY) Q_PROPERTY(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowBlur READ shadowBlur WRITE setShadowBlur) Q_PROPERTY(<span class="type"><a href="qstring.html">QString</a></span> shadowColor READ shadowColor WRITE setShadowColor) <span class="keyword">public</span>: Context2D(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>); <span class="type">void</span> setSize(<span class="type">int</span> width<span class="operator">,</span> <span class="type">int</span> height); <span class="type">void</span> setSize(<span class="keyword">const</span> <span class="type"><a href="qsize.html">QSize</a></span> <span class="operator">&</span>size); <span class="type"><a href="qsize.html">QSize</a></span> size() <span class="keyword">const</span>; <span class="type">void</span> clear(); <span class="type">void</span> reset(); <span class="comment">// compositing</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> globalAlpha() <span class="keyword">const</span>; <span class="comment">// (default 1.0)</span> <span class="type"><a href="qstring.html">QString</a></span> globalCompositeOperation() <span class="keyword">const</span>; <span class="comment">// (default over)</span> <span class="type"><a href="qvariant.html">QVariant</a></span> strokeStyle() <span class="keyword">const</span>; <span class="comment">// (default black)</span> <span class="type"><a href="qvariant.html">QVariant</a></span> fillStyle() <span class="keyword">const</span>; <span class="comment">// (default black)</span> <span class="type">void</span> setGlobalAlpha(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> alpha); <span class="type">void</span> setGlobalCompositeOperation(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>op); <span class="type">void</span> setStrokeStyle(<span class="keyword">const</span> <span class="type"><a href="qvariant.html">QVariant</a></span> <span class="operator">&</span>style); <span class="type">void</span> setFillStyle(<span class="keyword">const</span> <span class="type"><a href="qvariant.html">QVariant</a></span> <span class="operator">&</span>style); <span class="comment">// line caps/joins</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> lineWidth() <span class="keyword">const</span>; <span class="comment">// (default 1)</span> <span class="type"><a href="qstring.html">QString</a></span> lineCap() <span class="keyword">const</span>; <span class="comment">// "butt", "round", "square" (default "butt")</span> <span class="type"><a href="qstring.html">QString</a></span> lineJoin() <span class="keyword">const</span>; <span class="comment">// "round", "bevel", "miter" (default "miter")</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> miterLimit() <span class="keyword">const</span>; <span class="comment">// (default 10)</span> <span class="type">void</span> setLineWidth(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w); <span class="type">void</span> setLineCap(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>s); <span class="type">void</span> setLineJoin(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>s); <span class="type">void</span> setMiterLimit(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m); <span class="comment">// shadows</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowOffsetX() <span class="keyword">const</span>; <span class="comment">// (default 0)</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowOffsetY() <span class="keyword">const</span>; <span class="comment">// (default 0)</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowBlur() <span class="keyword">const</span>; <span class="comment">// (default 0)</span> <span class="type"><a href="qstring.html">QString</a></span> shadowColor() <span class="keyword">const</span>; <span class="comment">// (default black)</span> <span class="type">void</span> setShadowOffsetX(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x); <span class="type">void</span> setShadowOffsetY(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y); <span class="type">void</span> setShadowBlur(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> b); <span class="type">void</span> setShadowColor(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>str); <span class="keyword">public</span> <span class="keyword">slots</span>: <span class="type">void</span> save(); <span class="comment">// push state on state stack</span> <span class="type">void</span> restore(); <span class="comment">// pop state stack and restore state</span> <span class="type">void</span> scale(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y); <span class="type">void</span> rotate(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> angle); <span class="type">void</span> translate(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y); <span class="type">void</span> transform(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m11<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m12<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m21<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m22<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy); <span class="type">void</span> setTransform(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m11<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m12<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m21<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m22<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy); CanvasGradient createLinearGradient(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x0<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y0<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y1); CanvasGradient createRadialGradient(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x0<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y0<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> r0<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> r1); <span class="comment">// rects</span> <span class="type">void</span> clearRect(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h); <span class="type">void</span> fillRect(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h); <span class="type">void</span> strokeRect(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h); <span class="comment">// path API</span> <span class="type">void</span> beginPath(); <span class="type">void</span> closePath(); <span class="type">void</span> moveTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y); <span class="type">void</span> lineTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y); <span class="type">void</span> quadraticCurveTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cpx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cpy<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y); <span class="type">void</span> bezierCurveTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cp1x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cp1y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cp2x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cp2y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y); <span class="type">void</span> arcTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x2<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y2<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> radius); <span class="type">void</span> rect(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h); <span class="type">void</span> arc(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> radius<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> startAngle<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> endAngle<span class="operator">,</span> <span class="type">bool</span> anticlockwise); <span class="type">void</span> fill(); <span class="type">void</span> stroke(); <span class="type">void</span> clip(); <span class="type">bool</span> isPointInPath(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y) <span class="keyword">const</span>; <span class="comment">// drawing images</span> <span class="type">void</span> drawImage(DomImage <span class="operator">*</span>image<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy); <span class="type">void</span> drawImage(DomImage <span class="operator">*</span>image<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dw<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dh); <span class="type">void</span> drawImage(DomImage <span class="operator">*</span>image<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sy<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sw<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sh<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dw<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dh); <span class="comment">// pixel manipulation</span> ImageData getImageData(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sy<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sw<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sh); <span class="type">void</span> putImageData(ImageData image<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy); <span class="keyword">signals</span>: <span class="type">void</span> changed(<span class="keyword">const</span> <span class="type"><a href="qimage.html">QImage</a></span> <span class="operator">&</span>image); <span class="keyword">protected</span>: <span class="type">void</span> timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>e); <span class="keyword">private</span>: <span class="type">void</span> beginPainting(); <span class="keyword">const</span> <span class="type"><a href="qimage.html">QImage</a></span> <span class="operator">&</span>endPainting(); <span class="type">void</span> scheduleChange(); <span class="type">int</span> m_changeTimerId; <span class="type"><a href="qimage.html">QImage</a></span> m_image; <span class="type"><a href="qpainter.html">QPainter</a></span> m_painter; <span class="type"><a href="qpainterpath.html">QPainterPath</a></span> m_path; <span class="keyword">enum</span> DirtyFlag { DirtyTransformationMatrix <span class="operator">=</span> <span class="number">0x00001</span><span class="operator">,</span> DirtyClippingRegion <span class="operator">=</span> <span class="number">0x00002</span><span class="operator">,</span> DirtyStrokeStyle <span class="operator">=</span> <span class="number">0x00004</span><span class="operator">,</span> DirtyFillStyle <span class="operator">=</span> <span class="number">0x00008</span><span class="operator">,</span> DirtyGlobalAlpha <span class="operator">=</span> <span class="number">0x00010</span><span class="operator">,</span> DirtyLineWidth <span class="operator">=</span> <span class="number">0x00020</span><span class="operator">,</span> DirtyLineCap <span class="operator">=</span> <span class="number">0x00040</span><span class="operator">,</span> DirtyLineJoin <span class="operator">=</span> <span class="number">0x00080</span><span class="operator">,</span> DirtyMiterLimit <span class="operator">=</span> <span class="number">0x00100</span><span class="operator">,</span> MDirtyPen <span class="operator">=</span> DirtyStrokeStyle <span class="operator">|</span> DirtyLineWidth <span class="operator">|</span> DirtyLineCap <span class="operator">|</span> DirtyLineJoin <span class="operator">|</span> DirtyMiterLimit<span class="operator">,</span> DirtyShadowOffsetX <span class="operator">=</span> <span class="number">0x00200</span><span class="operator">,</span> DirtyShadowOffsetY <span class="operator">=</span> <span class="number">0x00400</span><span class="operator">,</span> DirtyShadowBlur <span class="operator">=</span> <span class="number">0x00800</span><span class="operator">,</span> DirtyShadowColor <span class="operator">=</span> <span class="number">0x01000</span><span class="operator">,</span> DirtyGlobalCompositeOperation <span class="operator">=</span> <span class="number">0x2000</span><span class="operator">,</span> DirtyFont <span class="operator">=</span> <span class="number">0x04000</span><span class="operator">,</span> DirtyTextAlign <span class="operator">=</span> <span class="number">0x08000</span><span class="operator">,</span> DirtyTextBaseline <span class="operator">=</span> <span class="number">0x10000</span><span class="operator">,</span> AllIsFullOfDirt <span class="operator">=</span> <span class="number">0xfffff</span> }; <span class="keyword">struct</span> State { State() : flags(<span class="number">0</span>) {} <span class="type"><a href="qmatrix.html">QMatrix</a></span> matrix; <span class="type"><a href="qpainterpath.html">QPainterPath</a></span> clipPath; <span class="type"><a href="qbrush.html">QBrush</a></span> strokeStyle; <span class="type"><a href="qbrush.html">QBrush</a></span> fillStyle; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> globalAlpha; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> lineWidth; <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>PenCapStyle lineCap; <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>PenJoinStyle lineJoin; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> miterLimit; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowOffsetX; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowOffsetY; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> shadowBlur; <span class="type"><a href="qcolor.html">QColor</a></span> shadowColor; <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode globalCompositeOperation; <span class="type"><a href="qfont.html">QFont</a></span> font; <span class="type">int</span> textAlign; <span class="type">int</span> textBaseline; <span class="type">int</span> flags; }; State m_state; <span class="type"><a href="qstack.html">QStack</a></span><span class="operator"><</span>State<span class="operator">></span> m_stateStack; }; <span class="preprocessor">#endif</span></pre> </div> <!-- @@@script/context2d/context2d.h --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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> Digia, Qt and their respective logos are trademarks of Digia Plc 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>