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<h1 class="title">document.cpp Example File</h1>
<span class="small-subtitle">demos/undo/document.cpp</span>
<!-- $$$demos/undo/document.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 <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="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="qcolor.html">QColor</a></span> <span class="operator">&</span>color<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="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="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="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="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="qrect.html">QRect</a></span> Shape<span class="operator">::</span>resizeHandle() <span class="keyword">const</span>
{
<span class="type"><a href="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="qrect.html">QRect</a></span>(br <span class="operator">-</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(resizeHandleWidth<span class="operator">,</span> resizeHandleWidth)<span class="operator">,</span> br);
}
<span class="type"><a href="qstring.html">QString</a></span> Shape<span class="operator">::</span>typeToString(Type type)
{
<span class="type"><a href="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="qstring.html">QString</a></span> <span class="operator">&</span>s<span class="operator">,</span> <span class="type">bool</span> <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="qpalette.html">QPalette</a></span><span class="operator">::</span>Base);
<span class="type"><a href="qpalette.html">QPalette</a></span> pal <span class="operator">=</span> palette();
pal<span class="operator">.</span>setBrush(<span class="type"><a href="qpalette.html">QPalette</a></span><span class="operator">::</span>Base<span class="operator">,</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/icons/background.png"</span>));
pal<span class="operator">.</span>setColor(<span class="type"><a href="qpalette.html">QPalette</a></span><span class="operator">::</span>HighlightedText<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>red);
setPalette(pal);
}
<span class="type"><a href="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="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="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="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="qstring.html">QString</a></span> <span class="operator">&</span>shapeName<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="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="qstring.html">QString</a></span> <span class="operator">&</span>shapeName<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="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;
}
<span class="type">bool</span> Document<span class="operator">::</span>load(<span class="type"><a href="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="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="qtextstream.html">QTextStream</a></span><span class="operator">::</span>Ok)
<span class="keyword">return</span> <span class="keyword">false</span>;
<span class="type">bool</span> 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="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="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="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="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="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="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="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="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="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="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="qrect.html">QRect</a></span> rect;
<span class="keyword">if</span> (m_resizeHandlePressed) {
rect <span class="operator">=</span> <span class="type"><a href="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="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="qgradient.html">QGradient</a></span> gradient(<span class="keyword">const</span> <span class="type"><a href="qcolor.html">QColor</a></span> <span class="operator">&</span>color<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> <span class="operator">&</span>rect)
{
<span class="type"><a href="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="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="qpolygon.html">QPolygon</a></span> triangle(<span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> <span class="operator">&</span>rect)
{
<span class="type"><a href="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="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>event)
{
<span class="type"><a href="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="qpainter.html">QPainter</a></span> painter(<span class="keyword">this</span>);
<span class="type"><a href="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="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="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="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="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="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="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="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="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="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="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="qstring.html">QString</a></span> Document<span class="operator">::</span>uniqueName(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>name) <span class="keyword">const</span>
{
<span class="type"><a href="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="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="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="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>
<!-- @@@demos/undo/document.cpp -->
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Documentation contributions included herein are the copyrights of
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License version 1.3</a> as published by the Free Software Foundation.</p>
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www.qt-project.org</a>.</p>
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