<?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>view.cpp 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-graphicsview-chip-example.html">40000 Chips</a></td><td >view.cpp 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">view.cpp Example File</h1> <span class="subtitle">graphicsview/chip/view.cpp</span> <!-- $$$graphicsview/chip/view.cpp-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">#include "view.h"</span> <span class="preprocessor">#if defined(QT_PRINTSUPPORT_LIB)</span> <span class="preprocessor">#include <QtPrintSupport/qtprintsupportglobal.h></span> <span class="preprocessor">#if QT_CONFIG(printdialog)</span> <span class="preprocessor">#include <QPrinter></span> <span class="preprocessor">#include <QPrintDialog></span> <span class="preprocessor">#endif</span> <span class="preprocessor">#endif</span> <span class="preprocessor">#ifndef QT_NO_OPENGL</span> <span class="preprocessor">#include <QtOpenGL></span> <span class="preprocessor">#else</span> <span class="preprocessor">#include <QtWidgets></span> <span class="preprocessor">#endif</span> <span class="preprocessor">#include <qmath.h></span> <span class="preprocessor">#if QT_CONFIG(wheelevent)</span> <span class="type">void</span> GraphicsView<span class="operator">::</span>wheelEvent(<span class="type"><a href="../qtgui/qwheelevent.html">QWheelEvent</a></span> <span class="operator">*</span>e) { <span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">></span>modifiers() <span class="operator">&</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ControlModifier) { <span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">></span>delta() <span class="operator">></span> <span class="number">0</span>) view<span class="operator">-</span><span class="operator">></span>zoomIn(<span class="number">6</span>); <span class="keyword">else</span> view<span class="operator">-</span><span class="operator">></span>zoomOut(<span class="number">6</span>); e<span class="operator">-</span><span class="operator">></span>accept(); } <span class="keyword">else</span> { <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>wheelEvent(e); } } <span class="preprocessor">#endif</span> View<span class="operator">::</span>View(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>name<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qframe.html">QFrame</a></span>(parent) { setFrameStyle(Sunken <span class="operator">|</span> StyledPanel); graphicsView <span class="operator">=</span> <span class="keyword">new</span> GraphicsView(<span class="keyword">this</span>); graphicsView<span class="operator">-</span><span class="operator">></span>setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing<span class="operator">,</span> <span class="keyword">false</span>); graphicsView<span class="operator">-</span><span class="operator">></span>setDragMode(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>RubberBandDrag); graphicsView<span class="operator">-</span><span class="operator">></span>setOptimizationFlags(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>DontSavePainterState); graphicsView<span class="operator">-</span><span class="operator">></span>setViewportUpdateMode(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>SmartViewportUpdate); graphicsView<span class="operator">-</span><span class="operator">></span>setTransformationAnchor(<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>AnchorUnderMouse); <span class="type">int</span> size <span class="operator">=</span> style()<span class="operator">-</span><span class="operator">></span>pixelMetric(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>PM_ToolBarIconSize); <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> iconSize(size<span class="operator">,</span> size); <span class="type"><a href="qtoolbutton.html">QToolButton</a></span> <span class="operator">*</span>zoomInIcon <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; zoomInIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeat(<span class="keyword">true</span>); zoomInIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeatInterval(<span class="number">33</span>); zoomInIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeatDelay(<span class="number">0</span>); zoomInIcon<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span>(<span class="string">":/zoomin.png"</span>)); zoomInIcon<span class="operator">-</span><span class="operator">></span>setIconSize(iconSize); <span class="type"><a href="qtoolbutton.html">QToolButton</a></span> <span class="operator">*</span>zoomOutIcon <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; zoomOutIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeat(<span class="keyword">true</span>); zoomOutIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeatInterval(<span class="number">33</span>); zoomOutIcon<span class="operator">-</span><span class="operator">></span>setAutoRepeatDelay(<span class="number">0</span>); zoomOutIcon<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span>(<span class="string">":/zoomout.png"</span>)); zoomOutIcon<span class="operator">-</span><span class="operator">></span>setIconSize(iconSize); zoomSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>; zoomSlider<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="number">0</span>); zoomSlider<span class="operator">-</span><span class="operator">></span>setMaximum(<span class="number">500</span>); zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">250</span>); zoomSlider<span class="operator">-</span><span class="operator">></span>setTickPosition(<span class="type"><a href="qslider.html">QSlider</a></span><span class="operator">::</span>TicksRight); <span class="comment">// Zoom slider layout</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>zoomSliderLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>; zoomSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(zoomInIcon); zoomSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(zoomSlider); zoomSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(zoomOutIcon); <span class="type"><a href="qtoolbutton.html">QToolButton</a></span> <span class="operator">*</span>rotateLeftIcon <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; rotateLeftIcon<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span>(<span class="string">":/rotateleft.png"</span>)); rotateLeftIcon<span class="operator">-</span><span class="operator">></span>setIconSize(iconSize); <span class="type"><a href="qtoolbutton.html">QToolButton</a></span> <span class="operator">*</span>rotateRightIcon <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; rotateRightIcon<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span>(<span class="string">":/rotateright.png"</span>)); rotateRightIcon<span class="operator">-</span><span class="operator">></span>setIconSize(iconSize); rotateSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>; rotateSlider<span class="operator">-</span><span class="operator">></span>setOrientation(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal); rotateSlider<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="operator">-</span><span class="number">360</span>); rotateSlider<span class="operator">-</span><span class="operator">></span>setMaximum(<span class="number">360</span>); rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">0</span>); rotateSlider<span class="operator">-</span><span class="operator">></span>setTickPosition(<span class="type"><a href="qslider.html">QSlider</a></span><span class="operator">::</span>TicksBelow); <span class="comment">// Rotate slider layout</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>rotateSliderLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>; rotateSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotateLeftIcon); rotateSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotateSlider); rotateSliderLayout<span class="operator">-</span><span class="operator">></span>addWidget(rotateRightIcon); resetButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; resetButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"0"</span>)); resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); <span class="comment">// Label layout</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>labelLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>; label <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(name); label2 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Pointer Mode"</span>)); selectModeButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; selectModeButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Select"</span>)); selectModeButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); selectModeButton<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>); dragModeButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; dragModeButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Drag"</span>)); dragModeButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); dragModeButton<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">false</span>); antialiasButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; antialiasButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Antialiasing"</span>)); antialiasButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); antialiasButton<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">false</span>); openGlButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; openGlButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"OpenGL"</span>)); openGlButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); <span class="preprocessor">#ifndef QT_NO_OPENGL</span> openGlButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="type">QGLFormat</span><span class="operator">::</span>hasOpenGL()); <span class="preprocessor">#else</span> openGlButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); <span class="preprocessor">#endif</span> printButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>; printButton<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span>(<span class="string">":/fileprint.png"</span>))); <span class="type"><a href="qbuttongroup.html">QButtonGroup</a></span> <span class="operator">*</span>pointerModeGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbuttongroup.html">QButtonGroup</a></span>(<span class="keyword">this</span>); pointerModeGroup<span class="operator">-</span><span class="operator">></span>setExclusive(<span class="keyword">true</span>); pointerModeGroup<span class="operator">-</span><span class="operator">></span>addButton(selectModeButton); pointerModeGroup<span class="operator">-</span><span class="operator">></span>addButton(dragModeButton); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(label); labelLayout<span class="operator">-</span><span class="operator">></span>addStretch(); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(label2); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(selectModeButton); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(dragModeButton); labelLayout<span class="operator">-</span><span class="operator">></span>addStretch(); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(antialiasButton); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(openGlButton); labelLayout<span class="operator">-</span><span class="operator">></span>addWidget(printButton); <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>topLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>; topLayout<span class="operator">-</span><span class="operator">></span>addLayout(labelLayout<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); topLayout<span class="operator">-</span><span class="operator">></span>addWidget(graphicsView<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>); topLayout<span class="operator">-</span><span class="operator">></span>addLayout(zoomSliderLayout<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); topLayout<span class="operator">-</span><span class="operator">></span>addLayout(rotateSliderLayout<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>); topLayout<span class="operator">-</span><span class="operator">></span>addWidget(resetButton<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>); setLayout(topLayout); connect(resetButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(resetView())); connect(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(setupMatrix())); connect(rotateSlider<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(setupMatrix())); connect(graphicsView<span class="operator">-</span><span class="operator">></span>verticalScrollBar()<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(setResetButtonEnabled())); connect(graphicsView<span class="operator">-</span><span class="operator">></span>horizontalScrollBar()<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(setResetButtonEnabled())); connect(selectModeButton<span class="operator">,</span> SIGNAL(toggled(bool))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(togglePointerMode())); connect(dragModeButton<span class="operator">,</span> SIGNAL(toggled(bool))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(togglePointerMode())); connect(antialiasButton<span class="operator">,</span> SIGNAL(toggled(bool))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(toggleAntialiasing())); connect(openGlButton<span class="operator">,</span> SIGNAL(toggled(bool))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(toggleOpenGL())); connect(rotateLeftIcon<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(rotateLeft())); connect(rotateRightIcon<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(rotateRight())); connect(zoomInIcon<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(zoomIn())); connect(zoomOutIcon<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(zoomOut())); connect(printButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(print())); setupMatrix(); } <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span> <span class="operator">*</span>View<span class="operator">::</span>view() <span class="keyword">const</span> { <span class="keyword">return</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span> <span class="operator">*</span><span class="operator">></span>(graphicsView); } <span class="type">void</span> View<span class="operator">::</span>resetView() { zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">250</span>); rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">0</span>); setupMatrix(); graphicsView<span class="operator">-</span><span class="operator">></span>ensureVisible(<span class="type"><a href="../qtcore/qrectf.html">QRectF</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><span class="operator">,</span> <span class="number">0</span>)); resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); } <span class="type">void</span> View<span class="operator">::</span>setResetButtonEnabled() { resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); } <span class="type">void</span> View<span class="operator">::</span>setupMatrix() { <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> scale <span class="operator">=</span> <a href="../qtcore/qtmath.html#qPow">qPow</a>(<span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">2</span>)<span class="operator">,</span> (zoomSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">-</span> <span class="number">250</span>) <span class="operator">/</span> <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">50</span>)); <span class="type"><a href="../qtgui/qmatrix.html">QMatrix</a></span> matrix; matrix<span class="operator">.</span>scale(scale<span class="operator">,</span> scale); matrix<span class="operator">.</span>rotate(rotateSlider<span class="operator">-</span><span class="operator">></span>value()); graphicsView<span class="operator">-</span><span class="operator">></span>setMatrix(matrix); setResetButtonEnabled(); } <span class="type">void</span> View<span class="operator">::</span>togglePointerMode() { graphicsView<span class="operator">-</span><span class="operator">></span>setDragMode(selectModeButton<span class="operator">-</span><span class="operator">></span>isChecked() <span class="operator">?</span> <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>RubberBandDrag : <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>ScrollHandDrag); graphicsView<span class="operator">-</span><span class="operator">></span>setInteractive(selectModeButton<span class="operator">-</span><span class="operator">></span>isChecked()); } <span class="type">void</span> View<span class="operator">::</span>toggleOpenGL() { <span class="preprocessor">#ifndef QT_NO_OPENGL</span> graphicsView<span class="operator">-</span><span class="operator">></span>setViewport(openGlButton<span class="operator">-</span><span class="operator">></span>isChecked() <span class="operator">?</span> <span class="keyword">new</span> <span class="type">QGLWidget</span>(<span class="type">QGLFormat</span>(QGL<span class="operator">::</span>SampleBuffers)) : <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>); <span class="preprocessor">#endif</span> } <span class="type">void</span> View<span class="operator">::</span>toggleAntialiasing() { graphicsView<span class="operator">-</span><span class="operator">></span>setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing<span class="operator">,</span> antialiasButton<span class="operator">-</span><span class="operator">></span>isChecked()); } <span class="type">void</span> View<span class="operator">::</span>print() { <span class="preprocessor">#if QT_CONFIG(printdialog)</span> <span class="type">QPrinter</span> printer; <span class="type">QPrintDialog</span> dialog(<span class="operator">&</span>printer<span class="operator">,</span> <span class="keyword">this</span>); <span class="keyword">if</span> (dialog<span class="operator">.</span>exec() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted) { <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> painter(<span class="operator">&</span>printer); graphicsView<span class="operator">-</span><span class="operator">></span>render(<span class="operator">&</span>painter); } <span class="preprocessor">#endif</span> } <span class="type">void</span> View<span class="operator">::</span>zoomIn(<span class="type">int</span> level) { zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(zoomSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">+</span> level); } <span class="type">void</span> View<span class="operator">::</span>zoomOut(<span class="type">int</span> level) { zoomSlider<span class="operator">-</span><span class="operator">></span>setValue(zoomSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">-</span> level); } <span class="type">void</span> View<span class="operator">::</span>rotateLeft() { rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(rotateSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">-</span> <span class="number">10</span>); } <span class="type">void</span> View<span class="operator">::</span>rotateRight() { rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(rotateSlider<span class="operator">-</span><span class="operator">></span>value() <span class="operator">+</span> <span class="number">10</span>); } </pre> </div> <!-- @@@graphicsview/chip/view.cpp --> </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>