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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">layoutitem.cpp Example File</h1> <span class="small-subtitle">graphicsview/basicgraphicslayouts/layoutitem.cpp</span> <!-- $$$graphicsview/basicgraphicslayouts/layoutitem.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 "layoutitem.h"</span> LayoutItem<span class="operator">::</span>LayoutItem(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>parent<span class="comment">/* = 0*/</span>) : <span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span>()<span class="operator">,</span> <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span>(parent) { m_pix <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(QLatin1String(<span class="string">":/images/block.png"</span>)); setGraphicsItem(<span class="keyword">this</span>); } LayoutItem<span class="operator">::</span><span class="operator">~</span>LayoutItem() { <span class="keyword">delete</span> m_pix; } <span class="type">void</span> LayoutItem<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 <span class="comment">/*= 0*/</span>) { Q_UNUSED(widget); Q_UNUSED(option); <span class="type"><a href="qrectf.html">QRectF</a></span> frame(<span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">0</span><span class="operator">,</span><span class="number">0</span>)<span class="operator">,</span> geometry()<span class="operator">.</span>size()); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w <span class="operator">=</span> m_pix<span class="operator">-</span><span class="operator">></span>width(); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h <span class="operator">=</span> m_pix<span class="operator">-</span><span class="operator">></span>height(); <span class="type"><a href="qgradient.html#QGradientStops-typedef">QGradientStops</a></span> stops; <span class="comment">// paint a background rect (with gradient)</span> <span class="type"><a href="qlineargradient.html">QLinearGradient</a></span> gradient(frame<span class="operator">.</span>topLeft()<span class="operator">,</span> frame<span class="operator">.</span>topLeft() <span class="operator">+</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">200</span><span class="operator">,</span><span class="number">200</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.0</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">60</span><span class="operator">,</span> <span class="number">60</span><span class="operator">,</span> <span class="number">60</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(frame<span class="operator">.</span>height()<span class="operator">/</span><span class="number">2</span><span class="operator">/</span>frame<span class="operator">.</span>height()<span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">102</span><span class="operator">,</span> <span class="number">176</span><span class="operator">,</span> <span class="number">54</span>)); <span class="comment">//stops << QGradientStop(((frame.height() + h)/2 )/frame.height(), QColor(157, 195, 55));</span> stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">1.0</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">215</span><span class="operator">,</span> <span class="number">215</span><span class="operator">,</span> <span class="number">215</span>)); gradient<span class="operator">.</span>setStops(stops); painter<span class="operator">-</span><span class="operator">></span>setBrush(<span class="type"><a href="qbrush.html">QBrush</a></span>(gradient)); painter<span class="operator">-</span><span class="operator">></span>drawRoundedRect(frame<span class="operator">,</span> <span class="number">10.0</span><span class="operator">,</span> <span class="number">10.0</span>); <span class="comment">// paint a rect around the pixmap (with gradient)</span> <span class="type"><a href="qpointf.html">QPointF</a></span> pixpos <span class="operator">=</span> frame<span class="operator">.</span>center() <span class="operator">-</span> (<span class="type"><a href="qpointf.html">QPointF</a></span>(w<span class="operator">,</span> h)<span class="operator">/</span><span class="number">2</span>); <span class="type"><a href="qrectf.html">QRectF</a></span> innerFrame(pixpos<span class="operator">,</span> <span class="type"><a href="qsizef.html">QSizeF</a></span>(w<span class="operator">,</span> h)); innerFrame<span class="operator">.</span>adjust(<span class="operator">-</span><span class="number">4</span><span class="operator">,</span> <span class="operator">-</span><span class="number">4</span><span class="operator">,</span> <span class="operator">+</span><span class="number">4</span><span class="operator">,</span> <span class="operator">+</span><span class="number">4</span>); gradient<span class="operator">.</span>setStart(innerFrame<span class="operator">.</span>topLeft()); gradient<span class="operator">.</span>setFinalStop(innerFrame<span class="operator">.</span>bottomRight()); stops<span class="operator">.</span>clear(); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.0</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">215</span><span class="operator">,</span> <span class="number">255</span><span class="operator">,</span> <span class="number">200</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.5</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">102</span><span class="operator">,</span> <span class="number">176</span><span class="operator">,</span> <span class="number">54</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">1.0</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</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>)); gradient<span class="operator">.</span>setStops(stops); painter<span class="operator">-</span><span class="operator">></span>setBrush(<span class="type"><a href="qbrush.html">QBrush</a></span>(gradient)); painter<span class="operator">-</span><span class="operator">></span>drawRoundedRect(innerFrame<span class="operator">,</span> <span class="number">10.0</span><span class="operator">,</span> <span class="number">10.0</span>); painter<span class="operator">-</span><span class="operator">></span>drawPixmap(pixpos<span class="operator">,</span> <span class="operator">*</span>m_pix); } <span class="type"><a href="qrectf.html">QRectF</a></span> LayoutItem<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="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">0</span><span class="operator">,</span><span class="number">0</span>)<span class="operator">,</span> geometry()<span class="operator">.</span>size()); } <span class="type">void</span> LayoutItem<span class="operator">::</span>setGeometry(<span class="keyword">const</span> <span class="type"><a href="qrectf.html">QRectF</a></span> <span class="operator">&</span>geom) { prepareGeometryChange(); <span class="type"><a href="qgraphicslayoutitem.html">QGraphicsLayoutItem</a></span><span class="operator">::</span>setGeometry(geom); setPos(geom<span class="operator">.</span>topLeft()); } <span class="type"><a href="qsizef.html">QSizeF</a></span> LayoutItem<span class="operator">::</span>sizeHint(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SizeHint which<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qsizef.html">QSizeF</a></span> <span class="operator">&</span>constraint) <span class="keyword">const</span> { <span class="keyword">switch</span> (which) { <span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>MinimumSize: <span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>PreferredSize: <span class="comment">// Do not allow a size smaller than the pixmap with two frames around it.</span> <span class="keyword">return</span> m_pix<span class="operator">-</span><span class="operator">></span>size() <span class="operator">+</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">12</span><span class="operator">,</span> <span class="number">12</span>); <span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>MaximumSize: <span class="keyword">return</span> <span class="type"><a href="qsizef.html">QSizeF</a></span>(<span class="number">1000</span><span class="operator">,</span><span class="number">1000</span>); <span class="keyword">default</span>: <span class="keyword">break</span>; } <span class="keyword">return</span> constraint; }</pre> </div> <!-- @@@graphicsview/basicgraphicslayouts/layoutitem.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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