<?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>document.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-tools-undo-example.html">Undo Framework</a></td><td >document.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">document.cpp Example File</h1> <span class="subtitle">tools/undo/document.cpp</span> <!-- $$$tools/undo/document.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 <qevent.h></span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QTextStream></span> <span class="preprocessor">#include <QUndoStack></span> <span class="preprocessor">#include "document.h"</span> <span class="preprocessor">#include "commands.h"</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="type">int</span> resizeHandleWidth <span class="operator">=</span> <span class="number">6</span>; <span class="comment">/****************************************************************************** ** Shape */</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> Shape<span class="operator">::</span>minSize(<span class="number">80</span><span class="operator">,</span> <span class="number">50</span>); Shape<span class="operator">::</span>Shape(Type type<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> <span class="operator">&</span>color<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> <span class="operator">&</span>rect) : m_type(type)<span class="operator">,</span> m_rect(rect)<span class="operator">,</span> m_color(color) { } Shape<span class="operator">::</span>Type Shape<span class="operator">::</span>type() <span class="keyword">const</span> { <span class="keyword">return</span> m_type; } <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> Shape<span class="operator">::</span>rect() <span class="keyword">const</span> { <span class="keyword">return</span> m_rect; } <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> Shape<span class="operator">::</span>color() <span class="keyword">const</span> { <span class="keyword">return</span> m_color; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> Shape<span class="operator">::</span>name() <span class="keyword">const</span> { <span class="keyword">return</span> m_name; } <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> Shape<span class="operator">::</span>resizeHandle() <span class="keyword">const</span> { <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> br <span class="operator">=</span> m_rect<span class="operator">.</span>bottomRight(); <span class="keyword">return</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(br <span class="operator">-</span> <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span>(resizeHandleWidth<span class="operator">,</span> resizeHandleWidth)<span class="operator">,</span> br); } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> Shape<span class="operator">::</span>typeToString(Type type) { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> result; <span class="keyword">switch</span> (type) { <span class="keyword">case</span> Rectangle: result <span class="operator">=</span> QLatin1String(<span class="string">"Rectangle"</span>); <span class="keyword">break</span>; <span class="keyword">case</span> Circle: result <span class="operator">=</span> QLatin1String(<span class="string">"Circle"</span>); <span class="keyword">break</span>; <span class="keyword">case</span> Triangle: result <span class="operator">=</span> QLatin1String(<span class="string">"Triangle"</span>); <span class="keyword">break</span>; } <span class="keyword">return</span> result; } Shape<span class="operator">::</span>Type Shape<span class="operator">::</span>stringToType(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>s<span class="operator">,</span> bool <span class="operator">*</span>ok) { <span class="keyword">if</span> (ok <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>) <span class="operator">*</span>ok <span class="operator">=</span> <span class="keyword">true</span>; <span class="keyword">if</span> (s <span class="operator">=</span><span class="operator">=</span> QLatin1String(<span class="string">"Rectangle"</span>)) <span class="keyword">return</span> Rectangle; <span class="keyword">if</span> (s <span class="operator">=</span><span class="operator">=</span> QLatin1String(<span class="string">"Circle"</span>)) <span class="keyword">return</span> Circle; <span class="keyword">if</span> (s <span class="operator">=</span><span class="operator">=</span> QLatin1String(<span class="string">"Triangle"</span>)) <span class="keyword">return</span> Triangle; <span class="keyword">if</span> (ok <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>) <span class="operator">*</span>ok <span class="operator">=</span> <span class="keyword">false</span>; <span class="keyword">return</span> Rectangle; } <span class="comment">/****************************************************************************** ** Document */</span> Document<span class="operator">::</span>Document(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)<span class="operator">,</span> m_currentIndex(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_mousePressIndex(<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> m_resizeHandlePressed(<span class="keyword">false</span>) { m_undoStack <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qundostack.html">QUndoStack</a></span>(<span class="keyword">this</span>); setAutoFillBackground(<span class="keyword">true</span>); setBackgroundRole(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Base); <span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span> pal <span class="operator">=</span> palette(); pal<span class="operator">.</span>setBrush(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Base<span class="operator">,</span> <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span>(<span class="string">":/icons/background.png"</span>)); pal<span class="operator">.</span>setColor(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>HighlightedText<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>red); setPalette(pal); } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> Document<span class="operator">::</span>addShape(<span class="keyword">const</span> Shape <span class="operator">&</span>shape) { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> name <span class="operator">=</span> Shape<span class="operator">::</span>typeToString(shape<span class="operator">.</span>type()); name <span class="operator">=</span> uniqueName(name); m_shapeList<span class="operator">.</span>append(shape); m_shapeList<span class="operator">[</span>m_shapeList<span class="operator">.</span>count() <span class="operator">-</span> <span class="number">1</span><span class="operator">]</span><span class="operator">.</span>m_name <span class="operator">=</span> name; setCurrentShape(m_shapeList<span class="operator">.</span>count() <span class="operator">-</span> <span class="number">1</span>); <span class="keyword">return</span> name; } <span class="type">void</span> Document<span class="operator">::</span>deleteShape(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>shapeName) { <span class="type">int</span> index <span class="operator">=</span> indexOf(shapeName); <span class="keyword">if</span> (index <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">return</span>; update(m_shapeList<span class="operator">.</span>at(index)<span class="operator">.</span>rect()); m_shapeList<span class="operator">.</span>removeAt(index); <span class="keyword">if</span> (index <span class="operator"><</span><span class="operator">=</span> m_currentIndex) { m_currentIndex <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; <span class="keyword">if</span> (index <span class="operator">=</span><span class="operator">=</span> m_shapeList<span class="operator">.</span>count()) <span class="operator">-</span><span class="operator">-</span>index; setCurrentShape(index); } } Shape Document<span class="operator">::</span>shape(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>shapeName) <span class="keyword">const</span> { <span class="type">int</span> index <span class="operator">=</span> indexOf(shapeName); <span class="keyword">if</span> (index <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">return</span> Shape(); <span class="keyword">return</span> m_shapeList<span class="operator">.</span>at(index); } <span class="type">void</span> Document<span class="operator">::</span>setShapeRect(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>shapeName<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> <span class="operator">&</span>rect) { <span class="type">int</span> index <span class="operator">=</span> indexOf(shapeName); <span class="keyword">if</span> (index <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">return</span>; Shape <span class="operator">&</span>shape <span class="operator">=</span> m_shapeList<span class="operator">[</span>index<span class="operator">]</span>; update(shape<span class="operator">.</span>rect()); update(rect); shape<span class="operator">.</span>m_rect <span class="operator">=</span> rect; } <span class="type">void</span> Document<span class="operator">::</span>setShapeColor(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>shapeName<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> <span class="operator">&</span>color) { <span class="type">int</span> index <span class="operator">=</span> indexOf(shapeName); <span class="keyword">if</span> (index <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">return</span>; Shape <span class="operator">&</span>shape <span class="operator">=</span> m_shapeList<span class="operator">[</span>index<span class="operator">]</span>; shape<span class="operator">.</span>m_color <span class="operator">=</span> color; update(shape<span class="operator">.</span>rect()); } <span class="type"><a href="qundostack.html">QUndoStack</a></span> <span class="operator">*</span>Document<span class="operator">::</span>undoStack() <span class="keyword">const</span> { <span class="keyword">return</span> m_undoStack; } bool Document<span class="operator">::</span>load(<span class="type"><a href="../qtcore/qtextstream.html">QTextStream</a></span> <span class="operator">&</span>stream) { m_shapeList<span class="operator">.</span>clear(); <span class="keyword">while</span> (<span class="operator">!</span>stream<span class="operator">.</span>atEnd()) { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> shapeType<span class="operator">,</span> shapeName<span class="operator">,</span> colorName; <span class="type">int</span> left<span class="operator">,</span> top<span class="operator">,</span> width<span class="operator">,</span> height; stream <span class="operator">></span><span class="operator">></span> shapeType <span class="operator">></span><span class="operator">></span> shapeName <span class="operator">></span><span class="operator">></span> colorName <span class="operator">></span><span class="operator">></span> left <span class="operator">></span><span class="operator">></span> top <span class="operator">></span><span class="operator">></span> width <span class="operator">></span><span class="operator">></span> height; <span class="keyword">if</span> (stream<span class="operator">.</span>status() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qtextstream.html">QTextStream</a></span><span class="operator">::</span>Ok) <span class="keyword">return</span> <span class="keyword">false</span>; bool ok; Shape<span class="operator">::</span>Type type <span class="operator">=</span> Shape<span class="operator">::</span>stringToType(shapeType<span class="operator">,</span> <span class="operator">&</span>ok); <span class="keyword">if</span> (<span class="operator">!</span>ok) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> color(colorName); <span class="keyword">if</span> (<span class="operator">!</span>color<span class="operator">.</span>isValid()) <span class="keyword">return</span> <span class="keyword">false</span>; Shape shape(type); shape<span class="operator">.</span>m_name <span class="operator">=</span> shapeName; shape<span class="operator">.</span>m_color <span class="operator">=</span> color; shape<span class="operator">.</span>m_rect <span class="operator">=</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(left<span class="operator">,</span> top<span class="operator">,</span> width<span class="operator">,</span> height); m_shapeList<span class="operator">.</span>append(shape); } m_currentIndex <span class="operator">=</span> m_shapeList<span class="operator">.</span>isEmpty() <span class="operator">?</span> <span class="operator">-</span><span class="number">1</span> : <span class="number">0</span>; <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="type">void</span> Document<span class="operator">::</span>save(<span class="type"><a href="../qtcore/qtextstream.html">QTextStream</a></span> <span class="operator">&</span>stream) { <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> m_shapeList<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">const</span> Shape <span class="operator">&</span>shape <span class="operator">=</span> m_shapeList<span class="operator">.</span>at(i); <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> r <span class="operator">=</span> shape<span class="operator">.</span>rect(); stream <span class="operator"><</span><span class="operator"><</span> Shape<span class="operator">::</span>typeToString(shape<span class="operator">.</span>type()) <span class="operator"><</span><span class="operator"><</span> QLatin1Char(<span class="char">' '</span>) <span class="operator"><</span><span class="operator"><</span> shape<span class="operator">.</span>name() <span class="operator"><</span><span class="operator"><</span> QLatin1Char(<span class="char">' '</span>) <span class="operator"><</span><span class="operator"><</span> shape<span class="operator">.</span>color()<span class="operator">.</span>name() <span class="operator"><</span><span class="operator"><</span> QLatin1Char(<span class="char">' '</span>) <span class="operator"><</span><span class="operator"><</span> r<span class="operator">.</span>left() <span class="operator"><</span><span class="operator"><</span> QLatin1Char(<span class="char">' '</span>) <span class="operator"><</span><span class="operator"><</span> r<span class="operator">.</span>top() <span class="operator"><</span><span class="operator"><</span> QLatin1Char(<span class="char">' '</span>) <span class="operator"><</span><span class="operator"><</span> r<span class="operator">.</span>width() <span class="operator"><</span><span class="operator"><</span> QLatin1Char(<span class="char">' '</span>) <span class="operator"><</span><span class="operator"><</span> r<span class="operator">.</span>height(); <span class="keyword">if</span> (i <span class="operator">!</span><span class="operator">=</span> m_shapeList<span class="operator">.</span>count() <span class="operator">-</span> <span class="number">1</span>) stream <span class="operator"><</span><span class="operator"><</span> QLatin1Char(<span class="char">'\n'</span>); } m_undoStack<span class="operator">-</span><span class="operator">></span>setClean(); } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> Document<span class="operator">::</span>fileName() <span class="keyword">const</span> { <span class="keyword">return</span> m_fileName; } <span class="type">void</span> Document<span class="operator">::</span>setFileName(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName) { m_fileName <span class="operator">=</span> fileName; } <span class="type">int</span> Document<span class="operator">::</span>indexAt(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> <span class="operator">&</span>pos) <span class="keyword">const</span> { <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> m_shapeList<span class="operator">.</span>count() <span class="operator">-</span> <span class="number">1</span>; i <span class="operator">></span><span class="operator">=</span> <span class="number">0</span>; <span class="operator">-</span><span class="operator">-</span>i) { <span class="keyword">if</span> (m_shapeList<span class="operator">.</span>at(i)<span class="operator">.</span>rect()<span class="operator">.</span>contains(pos)) <span class="keyword">return</span> i; } <span class="keyword">return</span> <span class="operator">-</span><span class="number">1</span>; } <span class="type">void</span> Document<span class="operator">::</span>mousePressEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) { event<span class="operator">-</span><span class="operator">></span>accept(); <span class="type">int</span> index <span class="operator">=</span> indexAt(event<span class="operator">-</span><span class="operator">></span>pos());; <span class="keyword">if</span> (index <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) { setCurrentShape(index); <span class="keyword">const</span> Shape <span class="operator">&</span>shape <span class="operator">=</span> m_shapeList<span class="operator">.</span>at(index); m_resizeHandlePressed <span class="operator">=</span> shape<span class="operator">.</span>resizeHandle()<span class="operator">.</span>contains(event<span class="operator">-</span><span class="operator">></span>pos()); <span class="keyword">if</span> (m_resizeHandlePressed) m_mousePressOffset <span class="operator">=</span> shape<span class="operator">.</span>rect()<span class="operator">.</span>bottomRight() <span class="operator">-</span> event<span class="operator">-</span><span class="operator">></span>pos(); <span class="keyword">else</span> m_mousePressOffset <span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>pos() <span class="operator">-</span> shape<span class="operator">.</span>rect()<span class="operator">.</span>topLeft(); } m_mousePressIndex <span class="operator">=</span> index; } <span class="type">void</span> Document<span class="operator">::</span>mouseReleaseEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) { event<span class="operator">-</span><span class="operator">></span>accept(); m_mousePressIndex <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; } <span class="type">void</span> Document<span class="operator">::</span>mouseMoveEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) { event<span class="operator">-</span><span class="operator">></span>accept(); <span class="keyword">if</span> (m_mousePressIndex <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">return</span>; <span class="keyword">const</span> Shape <span class="operator">&</span>shape <span class="operator">=</span> m_shapeList<span class="operator">.</span>at(m_mousePressIndex); <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> rect; <span class="keyword">if</span> (m_resizeHandlePressed) { rect <span class="operator">=</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(shape<span class="operator">.</span>rect()<span class="operator">.</span>topLeft()<span class="operator">,</span> event<span class="operator">-</span><span class="operator">></span>pos() <span class="operator">+</span> m_mousePressOffset); } <span class="keyword">else</span> { rect <span class="operator">=</span> shape<span class="operator">.</span>rect(); rect<span class="operator">.</span>moveTopLeft(event<span class="operator">-</span><span class="operator">></span>pos() <span class="operator">-</span> m_mousePressOffset); } <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> size <span class="operator">=</span> rect<span class="operator">.</span>size()<span class="operator">.</span>expandedTo(Shape<span class="operator">::</span>minSize); rect<span class="operator">.</span>setSize(size); m_undoStack<span class="operator">-</span><span class="operator">></span>push(<span class="keyword">new</span> SetShapeRectCommand(<span class="keyword">this</span><span class="operator">,</span> shape<span class="operator">.</span>name()<span class="operator">,</span> rect)); } <span class="keyword">static</span> <span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span> gradient(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> <span class="operator">&</span>color<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> <span class="operator">&</span>rect) { <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> c <span class="operator">=</span> color; c<span class="operator">.</span>setAlpha(<span class="number">160</span>); <span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span> result(rect<span class="operator">.</span>topLeft()<span class="operator">,</span> rect<span class="operator">.</span>bottomRight()); result<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> c<span class="operator">.</span>dark(<span class="number">150</span>)); result<span class="operator">.</span>setColorAt(<span class="number">0.5</span><span class="operator">,</span> c<span class="operator">.</span>light(<span class="number">200</span>)); result<span class="operator">.</span>setColorAt(<span class="number">1</span><span class="operator">,</span> c<span class="operator">.</span>dark(<span class="number">150</span>)); <span class="keyword">return</span> result; } <span class="keyword">static</span> <span class="type"><a href="../qtgui/qpolygon.html">QPolygon</a></span> triangle(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> <span class="operator">&</span>rect) { <span class="type"><a href="../qtgui/qpolygon.html">QPolygon</a></span> result(<span class="number">3</span>); result<span class="operator">.</span>setPoint(<span class="number">0</span><span class="operator">,</span> rect<span class="operator">.</span>center()<span class="operator">.</span>x()<span class="operator">,</span> rect<span class="operator">.</span>top()); result<span class="operator">.</span>setPoint(<span class="number">1</span><span class="operator">,</span> rect<span class="operator">.</span>right()<span class="operator">,</span> rect<span class="operator">.</span>bottom()); result<span class="operator">.</span>setPoint(<span class="number">2</span><span class="operator">,</span> rect<span class="operator">.</span>left()<span class="operator">,</span> rect<span class="operator">.</span>bottom()); <span class="keyword">return</span> result; } <span class="type">void</span> Document<span class="operator">::</span>paintEvent(<span class="type"><a href="../qtgui/qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>event) { <span class="type"><a href="../qtgui/qregion.html">QRegion</a></span> paintRegion <span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>region(); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> painter(<span class="keyword">this</span>); <span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span> pal <span class="operator">=</span> palette(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> m_shapeList<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">const</span> Shape <span class="operator">&</span>shape <span class="operator">=</span> m_shapeList<span class="operator">.</span>at(i); <span class="keyword">if</span> (<span class="operator">!</span>paintRegion<span class="operator">.</span>contains(shape<span class="operator">.</span>rect())) <span class="keyword">continue</span>; <span class="type"><a href="../qtgui/qpen.html">QPen</a></span> pen <span class="operator">=</span> pal<span class="operator">.</span>text()<span class="operator">.</span>color(); pen<span class="operator">.</span>setWidth(i <span class="operator">=</span><span class="operator">=</span> m_currentIndex <span class="operator">?</span> <span class="number">2</span> : <span class="number">1</span>); painter<span class="operator">.</span>setPen(pen); painter<span class="operator">.</span>setBrush(gradient(shape<span class="operator">.</span>color()<span class="operator">,</span> shape<span class="operator">.</span>rect())); <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> rect <span class="operator">=</span> shape<span class="operator">.</span>rect(); rect<span class="operator">.</span>adjust(<span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="operator">-</span>resizeHandleWidth<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="operator">-</span>resizeHandleWidth<span class="operator">/</span><span class="number">2</span>); <span class="comment">// paint the shape</span> <span class="keyword">switch</span> (shape<span class="operator">.</span>type()) { <span class="keyword">case</span> Shape<span class="operator">::</span>Rectangle: painter<span class="operator">.</span>drawRect(rect); <span class="keyword">break</span>; <span class="keyword">case</span> Shape<span class="operator">::</span>Circle: painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing); painter<span class="operator">.</span>drawEllipse(rect); painter<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>); <span class="keyword">break</span>; <span class="keyword">case</span> Shape<span class="operator">::</span>Triangle: painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing); painter<span class="operator">.</span>drawPolygon(triangle(rect)); painter<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>); <span class="keyword">break</span>; } <span class="comment">// paint the resize handle</span> painter<span class="operator">.</span>setPen(pal<span class="operator">.</span>text()<span class="operator">.</span>color()); painter<span class="operator">.</span>setBrush(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>white); painter<span class="operator">.</span>drawRect(shape<span class="operator">.</span>resizeHandle()<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="operator">-</span><span class="number">1</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1</span>)); <span class="comment">// paint the shape name</span> painter<span class="operator">.</span>setBrush(pal<span class="operator">.</span>text()); <span class="keyword">if</span> (shape<span class="operator">.</span>type() <span class="operator">=</span><span class="operator">=</span> Shape<span class="operator">::</span>Triangle) rect<span class="operator">.</span>adjust(<span class="number">0</span><span class="operator">,</span> rect<span class="operator">.</span>height()<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); painter<span class="operator">.</span>drawText(rect<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignCenter<span class="operator">,</span> shape<span class="operator">.</span>name()); } } <span class="type">void</span> Document<span class="operator">::</span>setCurrentShape(<span class="type">int</span> index) { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> currentName; <span class="keyword">if</span> (m_currentIndex <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) update(m_shapeList<span class="operator">.</span>at(m_currentIndex)<span class="operator">.</span>rect()); m_currentIndex <span class="operator">=</span> index; <span class="keyword">if</span> (m_currentIndex <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) { <span class="keyword">const</span> Shape <span class="operator">&</span>current <span class="operator">=</span> m_shapeList<span class="operator">.</span>at(m_currentIndex); update(current<span class="operator">.</span>rect()); currentName <span class="operator">=</span> current<span class="operator">.</span>name(); } <span class="keyword">emit</span> currentShapeChanged(currentName); } <span class="type">int</span> Document<span class="operator">::</span>indexOf(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>shapeName) <span class="keyword">const</span> { <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> m_shapeList<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">if</span> (m_shapeList<span class="operator">.</span>at(i)<span class="operator">.</span>name() <span class="operator">=</span><span class="operator">=</span> shapeName) <span class="keyword">return</span> i; } <span class="keyword">return</span> <span class="operator">-</span><span class="number">1</span>; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> Document<span class="operator">::</span>uniqueName(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>name) <span class="keyword">const</span> { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> unique; <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; ; <span class="operator">+</span><span class="operator">+</span>i) { unique <span class="operator">=</span> name; <span class="keyword">if</span> (i <span class="operator">></span> <span class="number">0</span>) unique <span class="operator">+</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>number(i); <span class="keyword">if</span> (indexOf(unique) <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">break</span>; } <span class="keyword">return</span> unique; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> Document<span class="operator">::</span>currentShapeName() <span class="keyword">const</span> { <span class="keyword">if</span> (m_currentIndex <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">return</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span>(); <span class="keyword">return</span> m_shapeList<span class="operator">.</span>at(m_currentIndex)<span class="operator">.</span>name(); } </pre> </div> <!-- @@@tools/undo/document.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>