<?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>composition.h 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-painting-composition-example.html">Composition Modes</a></td><td >composition.h 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">composition.h Example File</h1> <span class="subtitle">painting/composition/composition.h</span> <!-- $$$painting/composition/composition.h-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 demonstration applications 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">#ifndef COMPOSITION_H</span> <span class="preprocessor">#define COMPOSITION_H</span> <span class="preprocessor">#include "arthurwidgets.h"</span> <span class="preprocessor">#if QT_CONFIG(opengl)</span> <span class="preprocessor">#include "fbopaintdevice.h"</span> <span class="preprocessor">#include <QOpenGLTextureBlitter></span> <span class="preprocessor">#endif</span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QEvent></span> <span class="keyword">class</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>; <span class="keyword">class</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>; <span class="keyword">class</span> CompositionWidget : <span class="keyword">public</span> <span class="type"><a href="qwidget.html">QWidget</a></span> { Q_OBJECT <span class="keyword">public</span>: CompositionWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent); <span class="keyword">public</span> <span class="keyword">slots</span>: <span class="type">void</span> nextMode(); <span class="keyword">private</span>: bool m_cycle_enabled; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbClear; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbSource; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbDest; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbSourceOver; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbDestOver; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbSourceIn; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbDestIn; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbSourceOut; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbDestOut; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbSourceAtop; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbDestAtop; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbXor; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbPlus; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbMultiply; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbScreen; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbOverlay; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbDarken; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbLighten; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbColorDodge; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbColorBurn; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbHardLight; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbSoftLight; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbDifference; <span class="type"><a href="qradiobutton.html">QRadioButton</a></span> <span class="operator">*</span>rbExclusion; }; <span class="keyword">class</span> CompositionRenderer : <span class="keyword">public</span> ArthurFrame { Q_OBJECT <span class="keyword">enum</span> ObjectType { NoObject<span class="operator">,</span> Circle<span class="operator">,</span> Rectangle<span class="operator">,</span> Image }; Q_PROPERTY(<span class="type">int</span> circleColor READ circleColor WRITE setCircleColor) Q_PROPERTY(<span class="type">int</span> circleAlpha READ circleAlpha WRITE setCircleAlpha) Q_PROPERTY(bool animation READ animationEnabled WRITE setAnimationEnabled) <span class="keyword">public</span>: CompositionRenderer(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent); <span class="type">void</span> paint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> <span class="operator">*</span>) override; <span class="type">void</span> setCirclePos(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> <span class="operator">&</span>pos); <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> sizeHint() <span class="keyword">const</span> override { <span class="keyword">return</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(<span class="number">500</span><span class="operator">,</span> <span class="number">400</span>); } bool animationEnabled() <span class="keyword">const</span> { <span class="keyword">return</span> m_animation_enabled; } <span class="type">int</span> circleColor() <span class="keyword">const</span> { <span class="keyword">return</span> m_circle_hue; } <span class="type">int</span> circleAlpha() <span class="keyword">const</span> { <span class="keyword">return</span> m_circle_alpha; } <span class="keyword">protected</span>: <span class="type">void</span> mousePressEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>) override; <span class="type">void</span> mouseMoveEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>) override; <span class="type">void</span> mouseReleaseEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>) override; <span class="type">void</span> timerEvent(<span class="type"><a href="../qtcore/qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>) override; <span class="keyword">public</span> <span class="keyword">slots</span>: <span class="type">void</span> setClearMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Clear; update(); } <span class="type">void</span> setSourceMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Source; update(); } <span class="type">void</span> setDestMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Destination; update(); } <span class="type">void</span> setSourceOverMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOver; update(); } <span class="type">void</span> setDestOverMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationOver; update(); } <span class="type">void</span> setSourceInMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceIn; update(); } <span class="type">void</span> setDestInMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationIn; update(); } <span class="type">void</span> setSourceOutMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOut; update(); } <span class="type">void</span> setDestOutMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationOut; update(); } <span class="type">void</span> setSourceAtopMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceAtop; update(); } <span class="type">void</span> setDestAtopMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationAtop; update(); } <span class="type">void</span> setXorMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Xor; update(); } <span class="type">void</span> setPlusMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Plus; update(); } <span class="type">void</span> setMultiplyMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Multiply; update(); } <span class="type">void</span> setScreenMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Screen; update(); } <span class="type">void</span> setOverlayMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Overlay; update(); } <span class="type">void</span> setDarkenMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Darken; update(); } <span class="type">void</span> setLightenMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Lighten; update(); } <span class="type">void</span> setColorDodgeMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_ColorDodge; update(); } <span class="type">void</span> setColorBurnMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_ColorBurn; update(); } <span class="type">void</span> setHardLightMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_HardLight; update(); } <span class="type">void</span> setSoftLightMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SoftLight; update(); } <span class="type">void</span> setDifferenceMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Difference; update(); } <span class="type">void</span> setExclusionMode() { m_composition_mode <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Exclusion; update(); } <span class="type">void</span> setCircleAlpha(<span class="type">int</span> alpha) { m_circle_alpha <span class="operator">=</span> alpha; update(); } <span class="type">void</span> setCircleColor(<span class="type">int</span> hue) { m_circle_hue <span class="operator">=</span> hue; update(); } <span class="type">void</span> setAnimationEnabled(bool enabled); <span class="keyword">private</span>: <span class="type">void</span> updateCirclePos(); <span class="type">void</span> drawBase(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> <span class="operator">&</span>p); <span class="type">void</span> drawSource(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> <span class="operator">&</span>p); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode m_composition_mode; <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> m_image; <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> m_buffer; <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> m_base_buffer; <span class="type">int</span> m_circle_alpha; <span class="type">int</span> m_circle_hue; <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> m_circle_pos; <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> m_offset; ObjectType m_current_object; bool m_animation_enabled; <span class="type">int</span> m_animationTimer; <span class="preprocessor">#if QT_CONFIG(opengl)</span> <span class="type"><a href="../qtcore/qscopedpointer.html">QScopedPointer</a></span><span class="operator"><</span><span class="type">QFboPaintDevice</span><span class="operator">></span> m_fbo; <span class="type">int</span> m_pbuffer_size; <span class="comment">// width==height==size of pbuffer</span> <span class="type"><a href="../qtcore/qtglobal.html#uint-typedef">uint</a></span> m_base_tex; <span class="type"><a href="../qtcore/qtglobal.html#uint-typedef">uint</a></span> m_compositing_tex; <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> m_previous_size; <span class="type"><a href="../qtgui/qopengltextureblitter.html">QOpenGLTextureBlitter</a></span> m_blitter; <span class="preprocessor">#endif</span> }; <span class="preprocessor">#endif // COMPOSITION_H</span> </pre> </div> <!-- @@@painting/composition/composition.h --> </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>