<?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>customproxy.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-embeddeddialogs-example.html">Embedded Dialogs</a></td><td >customproxy.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">customproxy.cpp Example File</h1> <span class="subtitle">graphicsview/embeddeddialogs/customproxy.cpp</span> <!-- $$$graphicsview/embeddeddialogs/customproxy.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 "customproxy.h"</span> <span class="preprocessor">#include <QStyleOptionGraphicsItem></span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QGraphicsScene></span> CustomProxy<span class="operator">::</span>CustomProxy(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>WindowFlags wFlags) : <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span>(parent<span class="operator">,</span> wFlags)<span class="operator">,</span> popupShown(<span class="keyword">false</span>)<span class="operator">,</span> currentPopup(<span class="number">0</span>) { timeLine <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span>(<span class="number">250</span><span class="operator">,</span> <span class="keyword">this</span>); connect(timeLine<span class="operator">,</span> SIGNAL(valueChanged(<span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateStep(<span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span>))); connect(timeLine<span class="operator">,</span> SIGNAL(stateChanged(<span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>State))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(stateChanged(<span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>State))); } <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> CustomProxy<span class="operator">::</span>boundingRect() <span class="keyword">const</span> { <span class="keyword">return</span> <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span><span class="operator">::</span>boundingRect()<span class="operator">.</span>adjusted(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">10</span>); } <span class="type">void</span> CustomProxy<span class="operator">::</span>paintWindowFrame(<span class="type"><a href="../qtgui/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="keyword">const</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> color(<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">64</span>); <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> r <span class="operator">=</span> windowFrameRect(); <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> right(r<span class="operator">.</span>right()<span class="operator">,</span> r<span class="operator">.</span>top() <span class="operator">+</span> <span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> r<span class="operator">.</span>height() <span class="operator">-</span> <span class="number">10</span>); <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> bottom(r<span class="operator">.</span>left() <span class="operator">+</span> <span class="number">10</span><span class="operator">,</span> r<span class="operator">.</span>bottom()<span class="operator">,</span> r<span class="operator">.</span>width()<span class="operator">,</span> <span class="number">10</span>); bool intersectsRight <span class="operator">=</span> right<span class="operator">.</span>intersects(option<span class="operator">-</span><span class="operator">></span>exposedRect); bool intersectsBottom <span class="operator">=</span> bottom<span class="operator">.</span>intersects(option<span class="operator">-</span><span class="operator">></span>exposedRect); <span class="keyword">if</span> (intersectsRight <span class="operator">&</span><span class="operator">&</span> intersectsBottom) { <span class="type"><a href="../qtgui/qpainterpath.html">QPainterPath</a></span> path; path<span class="operator">.</span>addRect(right); path<span class="operator">.</span>addRect(bottom); painter<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoPen); painter<span class="operator">-</span><span class="operator">></span>setBrush(color); painter<span class="operator">-</span><span class="operator">></span>drawPath(path); } <span class="keyword">else</span> <span class="keyword">if</span> (intersectsBottom) { painter<span class="operator">-</span><span class="operator">></span>fillRect(bottom<span class="operator">,</span> color); } <span class="keyword">else</span> <span class="keyword">if</span> (intersectsRight) { painter<span class="operator">-</span><span class="operator">></span>fillRect(right<span class="operator">,</span> color); } <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span><span class="operator">::</span>paintWindowFrame(painter<span class="operator">,</span> option<span class="operator">,</span> widget); } <span class="type">void</span> CustomProxy<span class="operator">::</span>hoverEnterEvent(<span class="type"><a href="qgraphicsscenehoverevent.html">QGraphicsSceneHoverEvent</a></span> <span class="operator">*</span>event) { <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span><span class="operator">::</span>hoverEnterEvent(event); scene()<span class="operator">-</span><span class="operator">></span>setActiveWindow(<span class="keyword">this</span>); <span class="keyword">if</span> (timeLine<span class="operator">-</span><span class="operator">></span>currentValue() <span class="operator">!</span><span class="operator">=</span> <span class="number">1</span>) zoomIn(); } <span class="type">void</span> CustomProxy<span class="operator">::</span>hoverLeaveEvent(<span class="type"><a href="qgraphicsscenehoverevent.html">QGraphicsSceneHoverEvent</a></span> <span class="operator">*</span>event) { <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span><span class="operator">::</span>hoverLeaveEvent(event); <span class="keyword">if</span> (<span class="operator">!</span>popupShown <span class="operator">&</span><span class="operator">&</span> (timeLine<span class="operator">-</span><span class="operator">></span>direction() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Backward <span class="operator">|</span><span class="operator">|</span> timeLine<span class="operator">-</span><span class="operator">></span>currentValue() <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>)) { zoomOut(); } } bool CustomProxy<span class="operator">::</span>sceneEventFilter(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>watched<span class="operator">,</span> <span class="type"><a href="../qtcore/qevent.html">QEvent</a></span> <span class="operator">*</span>event) { <span class="keyword">if</span> (watched<span class="operator">-</span><span class="operator">></span>isWindow() <span class="operator">&</span><span class="operator">&</span> (event<span class="operator">-</span><span class="operator">></span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qevent.html">QEvent</a></span><span class="operator">::</span>UngrabMouse <span class="operator">|</span><span class="operator">|</span> event<span class="operator">-</span><span class="operator">></span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qevent.html">QEvent</a></span><span class="operator">::</span>GrabMouse)) { popupShown <span class="operator">=</span> watched<span class="operator">-</span><span class="operator">></span>isVisible(); <span class="keyword">if</span> (<span class="operator">!</span>popupShown <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>isUnderMouse()) zoomOut(); } <span class="keyword">return</span> <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span><span class="operator">::</span>sceneEventFilter(watched<span class="operator">,</span> event); } <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> CustomProxy<span class="operator">::</span>itemChange(GraphicsItemChange change<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> <span class="operator">&</span>value) { <span class="keyword">if</span> (change <span class="operator">=</span><span class="operator">=</span> ItemChildAddedChange <span class="operator">|</span><span class="operator">|</span> change <span class="operator">=</span><span class="operator">=</span> ItemChildRemovedChange) { <span class="keyword">if</span> (change <span class="operator">=</span><span class="operator">=</span> ItemChildAddedChange) { currentPopup <span class="operator">=</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span><span class="operator">></span>(value); currentPopup<span class="operator">-</span><span class="operator">></span>setCacheMode(ItemCoordinateCache); <span class="keyword">if</span> (scene()) currentPopup<span class="operator">-</span><span class="operator">></span>installSceneEventFilter(<span class="keyword">this</span>); } <span class="keyword">else</span> <span class="keyword">if</span> (scene()) { currentPopup<span class="operator">-</span><span class="operator">></span>removeSceneEventFilter(<span class="keyword">this</span>); currentPopup <span class="operator">=</span> <span class="number">0</span>; } } <span class="keyword">else</span> <span class="keyword">if</span> (currentPopup <span class="operator">&</span><span class="operator">&</span> change <span class="operator">=</span><span class="operator">=</span> ItemSceneHasChanged) { currentPopup<span class="operator">-</span><span class="operator">></span>installSceneEventFilter(<span class="keyword">this</span>); } <span class="keyword">return</span> <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span><span class="operator">::</span>itemChange(change<span class="operator">,</span> value); } <span class="type">void</span> CustomProxy<span class="operator">::</span>updateStep(<span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> step) { <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> r <span class="operator">=</span> boundingRect(); setTransform(<span class="type"><a href="../qtgui/qtransform.html">QTransform</a></span>() <span class="operator">.</span>translate(r<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> r<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2</span>) <span class="operator">.</span>rotate(step <span class="operator">*</span> <span class="number">30</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>XAxis) <span class="operator">.</span>rotate(step <span class="operator">*</span> <span class="number">10</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>YAxis) <span class="operator">.</span>rotate(step <span class="operator">*</span> <span class="number">5</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ZAxis) <span class="operator">.</span>scale(<span class="number">1</span> <span class="operator">+</span> <span class="number">1.5</span> <span class="operator">*</span> step<span class="operator">,</span> <span class="number">1</span> <span class="operator">+</span> <span class="number">1.5</span> <span class="operator">*</span> step) <span class="operator">.</span>translate(<span class="operator">-</span>r<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> <span class="operator">-</span>r<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2</span>)); } <span class="type">void</span> CustomProxy<span class="operator">::</span>stateChanged(<span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>State state) { <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Running) { <span class="keyword">if</span> (timeLine<span class="operator">-</span><span class="operator">></span>direction() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Forward) setCacheMode(ItemCoordinateCache); } <span class="keyword">else</span> <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>NotRunning) { <span class="keyword">if</span> (timeLine<span class="operator">-</span><span class="operator">></span>direction() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Backward) setCacheMode(DeviceCoordinateCache); } } <span class="type">void</span> CustomProxy<span class="operator">::</span>zoomIn() { <span class="keyword">if</span> (timeLine<span class="operator">-</span><span class="operator">></span>direction() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Forward) timeLine<span class="operator">-</span><span class="operator">></span>setDirection(<span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Forward); <span class="keyword">if</span> (timeLine<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>NotRunning) timeLine<span class="operator">-</span><span class="operator">></span>start(); } <span class="type">void</span> CustomProxy<span class="operator">::</span>zoomOut() { <span class="keyword">if</span> (timeLine<span class="operator">-</span><span class="operator">></span>direction() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Backward) timeLine<span class="operator">-</span><span class="operator">></span>setDirection(<span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>Backward); <span class="keyword">if</span> (timeLine<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtimeline.html">QTimeLine</a></span><span class="operator">::</span>NotRunning) timeLine<span class="operator">-</span><span class="operator">></span>start(); } </pre> </div> <!-- @@@graphicsview/embeddeddialogs/customproxy.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>