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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">embeddedsvgviewer.cpp Example File</h1> <span class="small-subtitle">demos/embedded/embeddedsvgviewer/embeddedsvgviewer.cpp</span> <!-- $$$demos/embedded/embeddedsvgviewer/embeddedsvgviewer.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 demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** 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 http://www.qt.io/terms-conditions. For further ** information use the contact form at http://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 or version 3 as published by the Free ** Software Foundation and appearing in the file LICENSE.LGPLv21 and ** LICENSE.LGPLv3 included in the packaging of this file. Please review the ** following information to ensure the GNU Lesser General Public License ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** As a special exception, The Qt Company gives you certain additional ** rights. These rights are described in The Qt Company LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QApplication></span> <span class="preprocessor">#include "embeddedsvgviewer.h"</span> EmbeddedSvgViewer<span class="operator">::</span>EmbeddedSvgViewer(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>filePath) { qApp<span class="operator">-</span><span class="operator">></span>setStyleSheet(<span class="string">" QSlider:vertical { width: 50px; } \ QSlider::groove:vertical { border: 1px solid black; border-radius: 3px; width: 6px; } \ QSlider::handle:vertical { height: 25px; margin: 0 -22px; image: url(':/files/v-slider-handle.svg'); } \ "</span>); m_renderer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsvgrenderer.html">QSvgRenderer</a></span>(filePath); m_imageSize <span class="operator">=</span> m_renderer<span class="operator">-</span><span class="operator">></span>viewBox()<span class="operator">.</span>size(); m_viewBoxCenter <span class="operator">=</span> (<span class="type"><a href="qpointf.html">QPointF</a></span>(m_imageSize<span class="operator">.</span>width() <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">2.0</span>)<span class="operator">,</span> m_imageSize<span class="operator">.</span>height() <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">2.0</span>))); m_zoomSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Vertical<span class="operator">,</span> <span class="keyword">this</span>); m_zoomSlider<span class="operator">-</span><span class="operator">></span>setMaximum(<span class="number">150</span>); m_zoomSlider<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="number">1</span>); connect(m_zoomSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setZoom(<span class="type">int</span>))); m_zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">100</span>); m_quitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(<span class="string">"Quit"</span><span class="operator">,</span> <span class="keyword">this</span>); connect(m_quitButton<span class="operator">,</span> SIGNAL(pressed())<span class="operator">,</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>instance()<span class="operator">,</span> SLOT(quit())); <span class="keyword">if</span> (m_renderer<span class="operator">-</span><span class="operator">></span>animated()) connect(m_renderer<span class="operator">,</span> SIGNAL(repaintNeeded())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(update())); } <span class="type">void</span> EmbeddedSvgViewer<span class="operator">::</span>paintEvent(<span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>event) { Q_UNUSED(event) <span class="type"><a href="qpainter.html">QPainter</a></span> painter(<span class="keyword">this</span>); m_renderer<span class="operator">-</span><span class="operator">></span>setViewBox(m_viewBox); m_renderer<span class="operator">-</span><span class="operator">></span>render(<span class="operator">&</span>painter); } <span class="type">void</span> EmbeddedSvgViewer<span class="operator">::</span>mouseMoveEvent ( <span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span> event ) { <span class="type">int</span> incX <span class="operator">=</span> <span class="type">int</span>((event<span class="operator">-</span><span class="operator">></span>globalX() <span class="operator">-</span> m_mousePress<span class="operator">.</span>x()) <span class="operator">*</span> m_imageScale); <span class="type">int</span> incY <span class="operator">=</span> <span class="type">int</span>((event<span class="operator">-</span><span class="operator">></span>globalY() <span class="operator">-</span> m_mousePress<span class="operator">.</span>y()) <span class="operator">*</span> m_imageScale); <span class="type"><a href="qpointf.html">QPointF</a></span> newCenter; newCenter<span class="operator">.</span>setX(m_viewBoxCenterOnMousePress<span class="operator">.</span>x() <span class="operator">-</span> incX); newCenter<span class="operator">.</span>setY(m_viewBoxCenterOnMousePress<span class="operator">.</span>y() <span class="operator">-</span> incY); <span class="type"><a href="qrectf.html">QRectF</a></span> newViewBox <span class="operator">=</span> getViewBox(newCenter); <span class="comment">// Do a bounded move on the horizontal:</span> <span class="keyword">if</span> ( (newViewBox<span class="operator">.</span>left() <span class="operator">></span><span class="operator">=</span> m_viewBoxBounds<span class="operator">.</span>left()) <span class="operator">&</span><span class="operator">&</span> (newViewBox<span class="operator">.</span>right() <span class="operator"><</span><span class="operator">=</span> m_viewBoxBounds<span class="operator">.</span>right()) ) { m_viewBoxCenter<span class="operator">.</span>setX(newCenter<span class="operator">.</span>x()); m_viewBox<span class="operator">.</span>setLeft(newViewBox<span class="operator">.</span>left()); m_viewBox<span class="operator">.</span>setRight(newViewBox<span class="operator">.</span>right()); } <span class="comment">// do a bounded move on the vertical:</span> <span class="keyword">if</span> ( (newViewBox<span class="operator">.</span>top() <span class="operator">></span><span class="operator">=</span> m_viewBoxBounds<span class="operator">.</span>top()) <span class="operator">&</span><span class="operator">&</span> (newViewBox<span class="operator">.</span>bottom() <span class="operator"><</span><span class="operator">=</span> m_viewBoxBounds<span class="operator">.</span>bottom()) ) { m_viewBoxCenter<span class="operator">.</span>setY(newCenter<span class="operator">.</span>y()); m_viewBox<span class="operator">.</span>setTop(newViewBox<span class="operator">.</span>top()); m_viewBox<span class="operator">.</span>setBottom(newViewBox<span class="operator">.</span>bottom()); } update(); } <span class="type">void</span> EmbeddedSvgViewer<span class="operator">::</span>mousePressEvent ( <span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span> event ) { m_viewBoxCenterOnMousePress <span class="operator">=</span> m_viewBoxCenter; m_mousePress <span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>globalPos(); } <span class="type"><a href="qrectf.html">QRectF</a></span> EmbeddedSvgViewer<span class="operator">::</span>getViewBox(<span class="type"><a href="qpointf.html">QPointF</a></span> viewBoxCenter) { <span class="type"><a href="qrectf.html">QRectF</a></span> result; result<span class="operator">.</span>setLeft(viewBoxCenter<span class="operator">.</span>x() <span class="operator">-</span> (m_viewBoxSize<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">2</span>)); result<span class="operator">.</span>setTop(viewBoxCenter<span class="operator">.</span>y() <span class="operator">-</span> (m_viewBoxSize<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2</span>)); result<span class="operator">.</span>setRight(viewBoxCenter<span class="operator">.</span>x() <span class="operator">+</span> (m_viewBoxSize<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">2</span>)); result<span class="operator">.</span>setBottom(viewBoxCenter<span class="operator">.</span>y() <span class="operator">+</span> (m_viewBoxSize<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2</span>)); <span class="keyword">return</span> result; } <span class="type">void</span> EmbeddedSvgViewer<span class="operator">::</span>updateImageScale() { m_imageScale <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>( (<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>)m_imageSize<span class="operator">.</span>width() <span class="operator">/</span> (<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>)width()<span class="operator">,</span> (<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>)m_imageSize<span class="operator">.</span>height() <span class="operator">/</span> (<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>)height())<span class="operator">*</span>m_zoomLevel; m_viewBoxSize<span class="operator">.</span>setWidth((<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>)width() <span class="operator">*</span> m_imageScale); m_viewBoxSize<span class="operator">.</span>setHeight((<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>)height() <span class="operator">*</span> m_imageScale); } <span class="type">void</span> EmbeddedSvgViewer<span class="operator">::</span>resizeEvent ( <span class="type"><a href="qresizeevent.html">QResizeEvent</a></span> <span class="operator">*</span> <span class="comment">/* event */</span> ) { <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> origZoom <span class="operator">=</span> m_zoomLevel; <span class="comment">// Get the new bounds:</span> m_zoomLevel <span class="operator">=</span> <span class="number">1.0</span>; updateImageScale(); m_viewBoxBounds <span class="operator">=</span> getViewBox(<span class="type"><a href="qpointf.html">QPointF</a></span>(m_imageSize<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">2.0</span><span class="operator">,</span> m_imageSize<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2.0</span>)); m_zoomLevel <span class="operator">=</span> origZoom; updateImageScale(); m_viewBox <span class="operator">=</span> getViewBox(m_viewBoxCenter); <span class="type"><a href="qrect.html">QRect</a></span> sliderRect; sliderRect<span class="operator">.</span>setLeft(width() <span class="operator">-</span> m_zoomSlider<span class="operator">-</span><span class="operator">></span>sizeHint()<span class="operator">.</span>width()); sliderRect<span class="operator">.</span>setRight(width()); sliderRect<span class="operator">.</span>setTop(height()<span class="operator">/</span><span class="number">4</span>); sliderRect<span class="operator">.</span>setBottom(height() <span class="operator">-</span> (height()<span class="operator">/</span><span class="number">4</span>)); m_zoomSlider<span class="operator">-</span><span class="operator">></span>setGeometry(sliderRect); } <span class="type">void</span> EmbeddedSvgViewer<span class="operator">::</span>setZoom(<span class="type">int</span> newZoom) { m_zoomLevel <span class="operator">=</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(newZoom) <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">100</span>); updateImageScale(); m_viewBox <span class="operator">=</span> getViewBox(m_viewBoxCenter); update(); }</pre> </div> <!-- @@@demos/embedded/embeddedsvgviewer/embeddedsvgviewer.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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