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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">bubble.cpp Example File</h1> <span class="small-subtitle">opengl/overpainting/bubble.cpp</span> <!-- $$$opengl/overpainting/bubble.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 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 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 <QtGui></span> <span class="preprocessor">#include "bubble.h"</span> Bubble<span class="operator">::</span>Bubble(<span class="keyword">const</span> <span class="type"><a href="qpointf.html">QPointF</a></span> <span class="operator">&</span>position<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> radius<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qpointf.html">QPointF</a></span> <span class="operator">&</span>velocity) : position(position)<span class="operator">,</span> vel(velocity)<span class="operator">,</span> radius(radius) { innerColor <span class="operator">=</span> randomColor(); outerColor <span class="operator">=</span> randomColor(); updateBrush(); } <span class="type">void</span> Bubble<span class="operator">::</span>updateBrush() { <span class="type"><a href="qradialgradient.html">QRadialGradient</a></span> gradient(<span class="type"><a href="qpointf.html">QPointF</a></span>(radius<span class="operator">,</span> radius)<span class="operator">,</span> radius<span class="operator">,</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(radius<span class="operator">*</span><span class="number">0.5</span><span class="operator">,</span> radius<span class="operator">*</span><span class="number">0.5</span>)); gradient<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">255</span><span class="operator">,</span> <span class="number">255</span><span class="operator">,</span> <span class="number">255</span><span class="operator">,</span> <span class="number">255</span>)); gradient<span class="operator">.</span>setColorAt(<span class="number">0.25</span><span class="operator">,</span> innerColor); gradient<span class="operator">.</span>setColorAt(<span class="number">1</span><span class="operator">,</span> outerColor); brush <span class="operator">=</span> <span class="type"><a href="qbrush.html">QBrush</a></span>(gradient); } <span class="type">void</span> Bubble<span class="operator">::</span>drawBubble(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>painter) { painter<span class="operator">-</span><span class="operator">></span>save(); painter<span class="operator">-</span><span class="operator">></span>translate(position<span class="operator">.</span>x() <span class="operator">-</span> radius<span class="operator">,</span> position<span class="operator">.</span>y() <span class="operator">-</span> radius); painter<span class="operator">-</span><span class="operator">></span>setBrush(brush); painter<span class="operator">-</span><span class="operator">></span>drawEllipse(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type">int</span>(<span class="number">2</span><span class="operator">*</span>radius)<span class="operator">,</span> <span class="type">int</span>(<span class="number">2</span><span class="operator">*</span>radius)); painter<span class="operator">-</span><span class="operator">></span>restore(); } <span class="type"><a href="qcolor.html">QColor</a></span> Bubble<span class="operator">::</span>randomColor() { <span class="type">int</span> red <span class="operator">=</span> <span class="type">int</span>(<span class="number">205</span> <span class="operator">+</span> <span class="number">50.0</span><span class="operator">*</span>qrand()<span class="operator">/</span>(RAND_MAX<span class="operator">+</span><span class="number">1.0</span>)); <span class="type">int</span> green <span class="operator">=</span> <span class="type">int</span>(<span class="number">205</span> <span class="operator">+</span> <span class="number">50.0</span><span class="operator">*</span>qrand()<span class="operator">/</span>(RAND_MAX<span class="operator">+</span><span class="number">1.0</span>)); <span class="type">int</span> blue <span class="operator">=</span> <span class="type">int</span>(<span class="number">205</span> <span class="operator">+</span> <span class="number">50.0</span><span class="operator">*</span>qrand()<span class="operator">/</span>(RAND_MAX<span class="operator">+</span><span class="number">1.0</span>)); <span class="type">int</span> alpha <span class="operator">=</span> <span class="type">int</span>(<span class="number">91</span> <span class="operator">+</span> <span class="number">100.0</span><span class="operator">*</span>qrand()<span class="operator">/</span>(RAND_MAX<span class="operator">+</span><span class="number">1.0</span>)); <span class="keyword">return</span> <span class="type"><a href="qcolor.html">QColor</a></span>(red<span class="operator">,</span> green<span class="operator">,</span> blue<span class="operator">,</span> alpha); } <span class="type">void</span> Bubble<span class="operator">::</span>move(<span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> <span class="operator">&</span>bbox) { position <span class="operator">+</span><span class="operator">=</span> vel; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> leftOverflow <span class="operator">=</span> position<span class="operator">.</span>x() <span class="operator">-</span> radius <span class="operator">-</span> bbox<span class="operator">.</span>left(); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> rightOverflow <span class="operator">=</span> position<span class="operator">.</span>x() <span class="operator">+</span> radius <span class="operator">-</span> bbox<span class="operator">.</span>right(); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> topOverflow <span class="operator">=</span> position<span class="operator">.</span>y() <span class="operator">-</span> radius <span class="operator">-</span> bbox<span class="operator">.</span>top(); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> bottomOverflow <span class="operator">=</span> position<span class="operator">.</span>y() <span class="operator">+</span> radius <span class="operator">-</span> bbox<span class="operator">.</span>bottom(); <span class="keyword">if</span> (leftOverflow <span class="operator"><</span> <span class="number">0.0</span>) { position<span class="operator">.</span>setX(position<span class="operator">.</span>x() <span class="operator">-</span> <span class="number">2</span> <span class="operator">*</span> leftOverflow); vel<span class="operator">.</span>setX(<span class="operator">-</span>vel<span class="operator">.</span>x()); } <span class="keyword">else</span> <span class="keyword">if</span> (rightOverflow <span class="operator">></span> <span class="number">0.0</span>) { position<span class="operator">.</span>setX(position<span class="operator">.</span>x() <span class="operator">-</span> <span class="number">2</span> <span class="operator">*</span> rightOverflow); vel<span class="operator">.</span>setX(<span class="operator">-</span>vel<span class="operator">.</span>x()); } <span class="keyword">if</span> (topOverflow <span class="operator"><</span> <span class="number">0.0</span>) { position<span class="operator">.</span>setY(position<span class="operator">.</span>y() <span class="operator">-</span> <span class="number">2</span> <span class="operator">*</span> topOverflow); vel<span class="operator">.</span>setY(<span class="operator">-</span>vel<span class="operator">.</span>y()); } <span class="keyword">else</span> <span class="keyword">if</span> (bottomOverflow <span class="operator">></span> <span class="number">0.0</span>) { position<span class="operator">.</span>setY(position<span class="operator">.</span>y() <span class="operator">-</span> <span class="number">2</span> <span class="operator">*</span> bottomOverflow); vel<span class="operator">.</span>setY(<span class="operator">-</span>vel<span class="operator">.</span>y()); } } <span class="type"><a href="qrectf.html">QRectF</a></span> Bubble<span class="operator">::</span>rect() { <span class="keyword">return</span> <span class="type"><a href="qrectf.html">QRectF</a></span>(position<span class="operator">.</span>x() <span class="operator">-</span> radius<span class="operator">,</span> position<span class="operator">.</span>y() <span class="operator">-</span> radius<span class="operator">,</span> <span class="number">2</span> <span class="operator">*</span> radius<span class="operator">,</span> <span class="number">2</span> <span class="operator">*</span> radius); }</pre> </div> <!-- @@@opengl/overpainting/bubble.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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