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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">coloritem.cpp Example File</h1> <span class="small-subtitle">graphicsview/dragdroprobot/coloritem.cpp</span> <!-- $$$graphicsview/dragdroprobot/coloritem.cpp-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">#include <QtGui></span> <span class="preprocessor">#include "coloritem.h"</span> ColorItem<span class="operator">::</span>ColorItem() : color(qrand() <span class="operator">%</span> <span class="number">256</span><span class="operator">,</span> qrand() <span class="operator">%</span> <span class="number">256</span><span class="operator">,</span> qrand() <span class="operator">%</span> <span class="number">256</span>) { setToolTip(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"QColor(%1, %2, %3)\n%4"</span>) <span class="operator">.</span>arg(color<span class="operator">.</span>red())<span class="operator">.</span>arg(color<span class="operator">.</span>green())<span class="operator">.</span>arg(color<span class="operator">.</span>blue()) <span class="operator">.</span>arg(<span class="string">"Click and drag this color onto the robot!"</span>)); setCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>OpenHandCursor); setAcceptedMouseButtons(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton); } <span class="type"><a href="qrectf.html">QRectF</a></span> ColorItem<span class="operator">::</span>boundingRect() <span class="keyword">const</span> { <span class="keyword">return</span> <span class="type"><a href="qrectf.html">QRectF</a></span>(<span class="operator">-</span><span class="number">15.5</span><span class="operator">,</span> <span class="operator">-</span><span class="number">15.5</span><span class="operator">,</span> <span class="number">34</span><span class="operator">,</span> <span class="number">34</span>); } <span class="type">void</span> ColorItem<span class="operator">::</span>paint(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>painter<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstyleoptiongraphicsitem.html">QStyleOptionGraphicsItem</a></span> <span class="operator">*</span>option<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget) { Q_UNUSED(option); Q_UNUSED(widget); painter<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen); painter<span class="operator">-</span><span class="operator">></span>setBrush(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>darkGray); painter<span class="operator">-</span><span class="operator">></span>drawEllipse(<span class="operator">-</span><span class="number">12</span><span class="operator">,</span> <span class="operator">-</span><span class="number">12</span><span class="operator">,</span> <span class="number">30</span><span class="operator">,</span> <span class="number">30</span>); painter<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="qpen.html">QPen</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black<span class="operator">,</span> <span class="number">1</span>)); painter<span class="operator">-</span><span class="operator">></span>setBrush(<span class="type"><a href="qbrush.html">QBrush</a></span>(color)); painter<span class="operator">-</span><span class="operator">></span>drawEllipse(<span class="operator">-</span><span class="number">15</span><span class="operator">,</span> <span class="operator">-</span><span class="number">15</span><span class="operator">,</span> <span class="number">30</span><span class="operator">,</span> <span class="number">30</span>); } <span class="type">void</span> ColorItem<span class="operator">::</span>mousePressEvent(<span class="type"><a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a></span> <span class="operator">*</span>) { setCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ClosedHandCursor); } <span class="type">void</span> ColorItem<span class="operator">::</span>mouseMoveEvent(<span class="type"><a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a></span> <span class="operator">*</span>event) { <span class="keyword">if</span> (<span class="type"><a href="qlinef.html">QLineF</a></span>(event<span class="operator">-</span><span class="operator">></span>screenPos()<span class="operator">,</span> event<span class="operator">-</span><span class="operator">></span>buttonDownScreenPos(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton)) <span class="operator">.</span>length() <span class="operator"><</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>startDragDistance()) { <span class="keyword">return</span>; } <span class="type"><a href="qdrag.html">QDrag</a></span> <span class="operator">*</span>drag <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qdrag.html">QDrag</a></span>(event<span class="operator">-</span><span class="operator">></span>widget()); <span class="type"><a href="qmimedata.html">QMimeData</a></span> <span class="operator">*</span>mime <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmimedata.html">QMimeData</a></span>; drag<span class="operator">-</span><span class="operator">></span>setMimeData(mime); <span class="keyword">static</span> <span class="type">int</span> n <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">if</span> (n<span class="operator">+</span><span class="operator">+</span> <span class="operator">></span> <span class="number">2</span> <span class="operator">&</span><span class="operator">&</span> (qrand() <span class="operator">%</span> <span class="number">3</span>) <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) { <span class="type"><a href="qimage.html">QImage</a></span> image(<span class="string">":/images/head.png"</span>); mime<span class="operator">-</span><span class="operator">></span>setImageData(image); drag<span class="operator">-</span><span class="operator">></span>setPixmap(<span class="type"><a href="qpixmap.html">QPixmap</a></span><span class="operator">::</span>fromImage(image)<span class="operator">.</span>scaled(<span class="number">30</span><span class="operator">,</span> <span class="number">40</span>)); drag<span class="operator">-</span><span class="operator">></span>setHotSpot(<span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">15</span><span class="operator">,</span> <span class="number">30</span>)); } <span class="keyword">else</span> { mime<span class="operator">-</span><span class="operator">></span>setColorData(color); mime<span class="operator">-</span><span class="operator">></span>setText(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"#%1%2%3"</span>) <span class="operator">.</span>arg(color<span class="operator">.</span>red()<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">16</span><span class="operator">,</span> QLatin1Char(<span class="char">'0'</span>)) <span class="operator">.</span>arg(color<span class="operator">.</span>green()<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">16</span><span class="operator">,</span> QLatin1Char(<span class="char">'0'</span>)) <span class="operator">.</span>arg(color<span class="operator">.</span>blue()<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">16</span><span class="operator">,</span> QLatin1Char(<span class="char">'0'</span>))); <span class="type"><a href="qpixmap.html">QPixmap</a></span> pixmap(<span class="number">34</span><span class="operator">,</span> <span class="number">34</span>); pixmap<span class="operator">.</span>fill(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>white); <span class="type"><a href="qpainter.html">QPainter</a></span> painter(<span class="operator">&</span>pixmap); painter<span class="operator">.</span>translate(<span class="number">15</span><span class="operator">,</span> <span class="number">15</span>); painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing); paint(<span class="operator">&</span>painter<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); painter<span class="operator">.</span>end(); pixmap<span class="operator">.</span>setMask(pixmap<span class="operator">.</span>createHeuristicMask()); drag<span class="operator">-</span><span class="operator">></span>setPixmap(pixmap); drag<span class="operator">-</span><span class="operator">></span>setHotSpot(<span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">15</span><span class="operator">,</span> <span class="number">20</span>)); } drag<span class="operator">-</span><span class="operator">></span>exec(); setCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>OpenHandCursor); } <span class="type">void</span> ColorItem<span class="operator">::</span>mouseReleaseEvent(<span class="type"><a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a></span> <span class="operator">*</span>) { setCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>OpenHandCursor); }</pre> </div> <!-- @@@graphicsview/dragdroprobot/coloritem.cpp --> </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. 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