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<h1 class="title">canvas.cpp Example File</h1>
<span class="small-subtitle">graphicsview/portedcanvas/canvas.cpp</span>
<!-- $$$graphicsview/portedcanvas/canvas.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 Digia Plc and its Subsidiary(-ies) 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 <QDateTime></span>
<span class="preprocessor">#include <QMainWindow></span>
<span class="preprocessor">#include <QStatusBar></span>
<span class="preprocessor">#include <QMessageBox></span>
<span class="preprocessor">#include <QMenuBar></span>
<span class="preprocessor">#include <QApplication></span>
<span class="preprocessor">#include <QPainter></span>
<span class="preprocessor">#include <QPrinter></span>
<span class="preprocessor">#include <QPrintDialog></span>
<span class="preprocessor">#include <QLabel></span>
<span class="preprocessor">#include <QImage></span>
<span class="preprocessor">#include <QProgressDialog></span>
<span class="preprocessor">#include <QPixmap></span>
<span class="preprocessor">#include <QMouseEvent></span>
<span class="preprocessor">#include <QStyleOptionGraphicsItem></span>
<span class="preprocessor">#include <QDebug></span>
<span class="preprocessor">#include "canvas.h"</span>
<span class="comment">// We use a global variable to save memory - all the brushes and pens in</span>
<span class="comment">// the mesh are shared.</span>
<span class="keyword">static</span> <span class="type"><a href="qbrush.html">QBrush</a></span> <span class="operator">*</span>tb <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">static</span> <span class="type"><a href="qpen.html">QPen</a></span> <span class="operator">*</span>tp <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">class</span> EdgeItem;
<span class="keyword">class</span> NodeItem;
<span class="keyword">class</span> EdgeItem: <span class="keyword">public</span> <span class="type"><a href="qgraphicslineitem.html">QGraphicsLineItem</a></span>
{
<span class="keyword">public</span>:
EdgeItem( NodeItem<span class="operator">*</span><span class="operator">,</span> NodeItem<span class="operator">*</span> );
<span class="type">void</span> setFromPoint( <span class="type">int</span> x<span class="operator">,</span> <span class="type">int</span> y ) ;
<span class="type">void</span> setToPoint( <span class="type">int</span> x<span class="operator">,</span> <span class="type">int</span> y );
<span class="keyword">static</span> <span class="type">int</span> count() { <span class="keyword">return</span> c; }
<span class="keyword">private</span>:
<span class="keyword">static</span> <span class="type">int</span> c;
};
<span class="keyword">class</span> ImageItem: <span class="keyword">public</span> <span class="type"><a href="qgraphicsrectitem.html">QGraphicsRectItem</a></span>
{
<span class="keyword">public</span>:
ImageItem( <span class="type"><a href="qimage.html">QImage</a></span> img );
<span class="keyword">protected</span>:
<span class="type">void</span> paint( <span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span><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">private</span>:
<span class="type"><a href="qimage.html">QImage</a></span> image;
<span class="type"><a href="qpixmap.html">QPixmap</a></span> pixmap;
};
ImageItem<span class="operator">::</span>ImageItem( <span class="type"><a href="qimage.html">QImage</a></span> img )
: image(img)
{
setRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> image<span class="operator">.</span>width()<span class="operator">,</span> image<span class="operator">.</span>height());
setFlag(ItemIsMovable);
<span class="preprocessor">#if !defined(Q_WS_QWS)</span>
pixmap<span class="operator">.</span>fromImage(image<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>OrderedAlphaDither);
<span class="preprocessor">#endif</span>
}
<span class="type">void</span> ImageItem<span class="operator">::</span>paint( <span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>p<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> )
{
<span class="comment">// On Qt/Embedded, we can paint a QImage as fast as a QPixmap,</span>
<span class="comment">// but on other platforms, we need to use a QPixmap.</span>
<span class="preprocessor">#if defined(Q_WS_QWS)</span>
p<span class="operator">-</span><span class="operator">></span>drawImage( option<span class="operator">-</span><span class="operator">></span>exposedRect<span class="operator">,</span> image<span class="operator">,</span> option<span class="operator">-</span><span class="operator">></span>exposedRect<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>OrderedAlphaDither );
<span class="preprocessor">#else</span>
p<span class="operator">-</span><span class="operator">></span>drawPixmap( option<span class="operator">-</span><span class="operator">></span>exposedRect<span class="operator">,</span> pixmap<span class="operator">,</span> option<span class="operator">-</span><span class="operator">></span>exposedRect );
<span class="preprocessor">#endif</span>
}
<span class="keyword">class</span> NodeItem: <span class="keyword">public</span> <span class="type"><a href="qgraphicsellipseitem.html">QGraphicsEllipseItem</a></span>
{
<span class="keyword">public</span>:
NodeItem();
<span class="operator">~</span>NodeItem() {}
<span class="type">void</span> addInEdge( EdgeItem <span class="operator">*</span>edge ) { inList<span class="operator">.</span>append( edge ); }
<span class="type">void</span> addOutEdge( EdgeItem <span class="operator">*</span>edge ) { outList<span class="operator">.</span>append( edge ); }
<span class="keyword">protected</span>:
<span class="type"><a href="qvariant.html">QVariant</a></span> itemChange(GraphicsItemChange change<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qvariant.html">QVariant</a></span> <span class="operator">&</span>value);
<span class="comment">// QPoint center() { return boundingRect().center(); }</span>
<span class="keyword">private</span>:
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span>EdgeItem<span class="operator">*</span><span class="operator">></span> inList;
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span>EdgeItem<span class="operator">*</span><span class="operator">></span> outList;
};
<span class="type">int</span> EdgeItem<span class="operator">::</span>c <span class="operator">=</span> <span class="number">0</span>;
EdgeItem<span class="operator">::</span>EdgeItem( NodeItem <span class="operator">*</span>from<span class="operator">,</span> NodeItem <span class="operator">*</span>to )
: <span class="type"><a href="qgraphicslineitem.html">QGraphicsLineItem</a></span>( )
{
c<span class="operator">+</span><span class="operator">+</span>;
setPen( <span class="operator">*</span>tp );
from<span class="operator">-</span><span class="operator">></span>addOutEdge( <span class="keyword">this</span> );
to<span class="operator">-</span><span class="operator">></span>addInEdge( <span class="keyword">this</span> );
setLine( <span class="type"><a href="qlinef.html">QLineF</a></span>(<span class="type">int</span>(from<span class="operator">-</span><span class="operator">></span>x())<span class="operator">,</span> <span class="type">int</span>(from<span class="operator">-</span><span class="operator">></span>y())<span class="operator">,</span> <span class="type">int</span>(to<span class="operator">-</span><span class="operator">></span>x())<span class="operator">,</span> <span class="type">int</span>(to<span class="operator">-</span><span class="operator">></span>y()) ));
setZValue( <span class="number">127</span> );
setBoundingRegionGranularity(<span class="number">0.05</span>);
}
<span class="type">void</span> EdgeItem<span class="operator">::</span>setFromPoint( <span class="type">int</span> x<span class="operator">,</span> <span class="type">int</span> y )
{
setLine(<span class="type"><a href="qlinef.html">QLineF</a></span>( x<span class="operator">,</span>y<span class="operator">,</span> line()<span class="operator">.</span>p2()<span class="operator">.</span>x()<span class="operator">,</span> line()<span class="operator">.</span>p2()<span class="operator">.</span>y() ));
}
<span class="type">void</span> EdgeItem<span class="operator">::</span>setToPoint( <span class="type">int</span> x<span class="operator">,</span> <span class="type">int</span> y )
{
setLine(<span class="type"><a href="qlinef.html">QLineF</a></span>( line()<span class="operator">.</span>p1()<span class="operator">.</span>x()<span class="operator">,</span> line()<span class="operator">.</span>p1()<span class="operator">.</span>y()<span class="operator">,</span> x<span class="operator">,</span> y ));
}
<span class="type"><a href="qvariant.html">QVariant</a></span> NodeItem<span class="operator">::</span>itemChange(GraphicsItemChange change<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qvariant.html">QVariant</a></span> <span class="operator">&</span>value)
{
<span class="keyword">if</span> (change <span class="operator">=</span><span class="operator">=</span> ItemPositionHasChanged) {
EdgeItem <span class="operator">*</span>edge;
foreach(edge<span class="operator">,</span> inList) {
edge<span class="operator">-</span><span class="operator">></span>setToPoint( <span class="type">int</span>(x())<span class="operator">,</span> <span class="type">int</span>(y()) );
}
foreach(edge<span class="operator">,</span> outList) {
edge<span class="operator">-</span><span class="operator">></span>setFromPoint( <span class="type">int</span>(x())<span class="operator">,</span> <span class="type">int</span>(y()) );
}
}
<span class="keyword">return</span> <span class="type"><a href="qgraphicsellipseitem.html">QGraphicsEllipseItem</a></span><span class="operator">::</span>itemChange(change<span class="operator">,</span> value);
}
NodeItem<span class="operator">::</span>NodeItem( )
: <span class="type"><a href="qgraphicsellipseitem.html">QGraphicsEllipseItem</a></span>( <span class="type"><a href="qrectf.html">QRectF</a></span>(<span class="operator">-</span><span class="number">3</span><span class="operator">,</span> <span class="operator">-</span><span class="number">3</span><span class="operator">,</span> <span class="number">6</span><span class="operator">,</span> <span class="number">6</span>) )
{
setPen( <span class="operator">*</span>tp );
setBrush( <span class="operator">*</span>tb );
setZValue( <span class="number">128</span> );
setFlag(ItemIsMovable);
}
FigureEditor<span class="operator">::</span>FigureEditor(
<span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span><span class="operator">&</span> c<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span> parent<span class="operator">,</span>
<span class="keyword">const</span> <span class="type">char</span><span class="operator">*</span> name<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WindowFlags f) :
<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span>(<span class="operator">&</span>c<span class="operator">,</span>parent)
{
setObjectName(name);
setWindowFlags(f);
setRenderHints(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing <span class="operator">|</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>SmoothPixmapTransform);
}
<span class="type">void</span> FigureEditor<span class="operator">::</span>clear()
{
scene()<span class="operator">-</span><span class="operator">></span>clear();
}
BouncyLogo<span class="operator">::</span>BouncyLogo() :
xvel(<span class="number">0</span>)<span class="operator">,</span> yvel(<span class="number">0</span>)
{
setPixmap(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/trolltech/examples/graphicsview/portedcanvas/qt-trans.xpm"</span>));
}
<span class="keyword">const</span> <span class="type">int</span> logo_rtti <span class="operator">=</span> <span class="number">1234</span>;
<span class="type">int</span> BouncyLogo<span class="operator">::</span>type() <span class="keyword">const</span>
{
<span class="keyword">return</span> logo_rtti;
}
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> BouncyLogo<span class="operator">::</span>shape() <span class="keyword">const</span>
{
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path;
path<span class="operator">.</span>addRect(boundingRect());
<span class="keyword">return</span> path;
}
<span class="type">void</span> BouncyLogo<span class="operator">::</span>initPos()
{
initSpeed();
<span class="type">int</span> trial<span class="operator">=</span><span class="number">1000</span>;
<span class="keyword">do</span> {
setPos(qrand()<span class="operator">%</span><span class="type">int</span>(scene()<span class="operator">-</span><span class="operator">></span>width())<span class="operator">,</span>qrand()<span class="operator">%</span><span class="type">int</span>(scene()<span class="operator">-</span><span class="operator">></span>height()));
advance(<span class="number">0</span>);
} <span class="keyword">while</span> (trial<span class="operator">-</span><span class="operator">-</span> <span class="operator">&</span><span class="operator">&</span> xvel<span class="operator">=</span><span class="operator">=</span><span class="number">0.0</span> <span class="operator">&</span><span class="operator">&</span> yvel<span class="operator">=</span><span class="operator">=</span><span class="number">0.0</span>);
}
<span class="type">void</span> BouncyLogo<span class="operator">::</span>initSpeed()
{
<span class="keyword">const</span> <span class="type">double</span> speed <span class="operator">=</span> <span class="number">4.0</span>;
<span class="type">double</span> d <span class="operator">=</span> (<span class="type">double</span>)(qrand()<span class="operator">%</span><span class="number">1024</span>) <span class="operator">/</span> <span class="number">1024.0</span>;
xvel <span class="operator">=</span> d<span class="operator">*</span>speed<span class="operator">*</span><span class="number">2</span><span class="operator">-</span>speed;
yvel <span class="operator">=</span> (<span class="number">1</span><span class="operator">-</span>d)<span class="operator">*</span>speed<span class="operator">*</span><span class="number">2</span><span class="operator">-</span>speed;
}
<span class="type">void</span> BouncyLogo<span class="operator">::</span>advance(<span class="type">int</span> stage)
{
<span class="keyword">switch</span> ( stage ) {
<span class="keyword">case</span> <span class="number">0</span>: {
<span class="type">double</span> vx <span class="operator">=</span> xvel;
<span class="type">double</span> vy <span class="operator">=</span> yvel;
<span class="keyword">if</span> ( vx <span class="operator">=</span><span class="operator">=</span> <span class="number">0.0</span> <span class="operator">&</span><span class="operator">&</span> vy <span class="operator">=</span><span class="operator">=</span> <span class="number">0.0</span> ) {
<span class="comment">// stopped last turn</span>
initSpeed();
vx <span class="operator">=</span> xvel;
vy <span class="operator">=</span> yvel;
}
<span class="type">double</span> nx <span class="operator">=</span> x() <span class="operator">+</span> vx;
<span class="type">double</span> ny <span class="operator">=</span> y() <span class="operator">+</span> vy;
<span class="keyword">if</span> ( nx <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> nx <span class="operator">></span><span class="operator">=</span> scene()<span class="operator">-</span><span class="operator">></span>width() )
vx <span class="operator">=</span> <span class="operator">-</span>vx;
<span class="keyword">if</span> ( ny <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> ny <span class="operator">></span><span class="operator">=</span> scene()<span class="operator">-</span><span class="operator">></span>height() )
vy <span class="operator">=</span> <span class="operator">-</span>vy;
<span class="keyword">for</span> (<span class="type">int</span> bounce<span class="operator">=</span><span class="number">0</span>; bounce<span class="operator"><</span><span class="number">4</span>; bounce<span class="operator">+</span><span class="operator">+</span>) {
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span><span class="operator">></span> l<span class="operator">=</span>scene()<span class="operator">-</span><span class="operator">></span>collidingItems(<span class="keyword">this</span>);
<span class="keyword">for</span> (<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span><span class="operator">></span><span class="operator">::</span>Iterator it<span class="operator">=</span>l<span class="operator">.</span>begin(); it<span class="operator">!</span><span class="operator">=</span>l<span class="operator">.</span>end(); <span class="operator">+</span><span class="operator">+</span>it) {
<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>hit <span class="operator">=</span> <span class="operator">*</span>it;
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> advancedShape <span class="operator">=</span> <span class="type"><a href="qmatrix.html">QMatrix</a></span>()<span class="operator">.</span>translate(xvel<span class="operator">,</span> yvel)<span class="operator">.</span>map(shape());
<span class="keyword">if</span> ( hit<span class="operator">-</span><span class="operator">></span>type()<span class="operator">=</span><span class="operator">=</span>logo_rtti <span class="operator">&</span><span class="operator">&</span> hit<span class="operator">-</span><span class="operator">></span>collidesWithPath(mapToItem(hit<span class="operator">,</span> advancedShape)) ) {
<span class="keyword">switch</span> ( bounce ) {
<span class="keyword">case</span> <span class="number">0</span>:
vx <span class="operator">=</span> <span class="operator">-</span>vx;
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="number">1</span>:
vy <span class="operator">=</span> <span class="operator">-</span>vy;
vx <span class="operator">=</span> <span class="operator">-</span>vx;
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="number">2</span>:
vx <span class="operator">=</span> <span class="operator">-</span>vx;
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="number">3</span>:
<span class="comment">// Stop for this turn</span>
vx <span class="operator">=</span> <span class="number">0</span>;
vy <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">break</span>;
}
xvel <span class="operator">=</span> vx;
yvel <span class="operator">=</span> vy;
<span class="keyword">break</span>;
}
}
}
<span class="keyword">if</span> ( x()<span class="operator">+</span>vx <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> x()<span class="operator">+</span>vx <span class="operator">></span><span class="operator">=</span> scene()<span class="operator">-</span><span class="operator">></span>width() )
vx <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">if</span> ( y()<span class="operator">+</span>vy <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> y()<span class="operator">+</span>vy <span class="operator">></span><span class="operator">=</span> scene()<span class="operator">-</span><span class="operator">></span>height() )
vy <span class="operator">=</span> <span class="number">0</span>;
xvel <span class="operator">=</span> vx;
yvel <span class="operator">=</span> vy;
} <span class="keyword">break</span>;
<span class="keyword">case</span> <span class="number">1</span>:
moveBy(xvel<span class="operator">,</span> yvel);
<span class="keyword">break</span>;
}
}
<span class="keyword">static</span> <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> mainCount <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">static</span> <span class="type"><a href="qimage.html">QImage</a></span> <span class="operator">*</span>butterflyimg;
<span class="keyword">static</span> <span class="type"><a href="qimage.html">QImage</a></span> <span class="operator">*</span>logoimg;
Main<span class="operator">::</span>Main(<span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span><span class="operator">&</span> c<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span> parent<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WindowFlags f) :
<span class="type"><a href="qmainwindow.html">QMainWindow</a></span>(parent<span class="operator">,</span> f)<span class="operator">,</span>
canvas(c)
{
editor <span class="operator">=</span> <span class="keyword">new</span> FigureEditor(canvas<span class="operator">,</span><span class="keyword">this</span>);
<span class="type"><a href="qmenubar.html">QMenuBar</a></span><span class="operator">*</span> menu <span class="operator">=</span> menuBar();
<span class="type"><a href="qmenu.html">QMenu</a></span><span class="operator">*</span> file <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(<span class="string">"&File"</span><span class="operator">,</span> menu );
file<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&Fill canvas"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(init())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_F);
file<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&Erase canvas"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(clear())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_E);
file<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&New view"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(newView())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_N);
file<span class="operator">-</span><span class="operator">></span>addSeparator();
file<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&Print..."</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(print())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_P);
file<span class="operator">-</span><span class="operator">></span>addSeparator();
file<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"E&xit"</span><span class="operator">,</span> qApp<span class="operator">,</span> SLOT(quit())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Q);
menu<span class="operator">-</span><span class="operator">></span>addMenu(file);
<span class="type"><a href="qmenu.html">QMenu</a></span><span class="operator">*</span> edit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(<span class="string">"&Edit"</span><span class="operator">,</span> menu );
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add &Circle"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addCircle())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_C);
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add &Hexagon"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addHexagon())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_H);
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add &Polygon"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addPolygon())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_P);
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add Spl&ine"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addSpline())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_I);
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add &Text"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addText())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_T);
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add &Line"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addLine())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_L);
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add &Rectangle"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addRectangle())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_R);
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add &Sprite"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addSprite())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_S);
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Create &Mesh"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addMesh())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_M );
edit<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Add &Alpha-blended image"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addButterfly())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ALT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_A);
menu<span class="operator">-</span><span class="operator">></span>addMenu(edit);
<span class="type"><a href="qmenu.html">QMenu</a></span><span class="operator">*</span> view <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(<span class="string">"&View"</span><span class="operator">,</span> menu );
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&Enlarge"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(enlarge())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SHIFT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Plus);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Shr&ink"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(shrink())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SHIFT<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Minus);
view<span class="operator">-</span><span class="operator">></span>addSeparator();
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&Rotate clockwise"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(rotateClockwise())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_PageDown);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Rotate &counterclockwise"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(rotateCounterClockwise())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_PageUp);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&Zoom in"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(zoomIn())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Plus);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Zoom &out"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(zoomOut())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Minus);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Translate left"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(moveL())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Left);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Translate right"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(moveR())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Right);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Translate up"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(moveU())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Up);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"Translate down"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(moveD())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Down);
view<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&Mirror"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(mirror())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CTRL<span class="operator">+</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Home);
menu<span class="operator">-</span><span class="operator">></span>addMenu(view);
menu<span class="operator">-</span><span class="operator">></span>addSeparator();
<span class="type"><a href="qmenu.html">QMenu</a></span><span class="operator">*</span> help <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(<span class="string">"&Help"</span><span class="operator">,</span> menu );
help<span class="operator">-</span><span class="operator">></span>addAction(<span class="string">"&About"</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(help())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_F1);
menu<span class="operator">-</span><span class="operator">></span>addMenu(help);
statusBar();
setCentralWidget(editor);
<span class="preprocessor">#if !defined(Q_OS_SYMBIAN)</span>
printer <span class="operator">=</span> <span class="number">0</span>;
<span class="preprocessor">#endif</span>
init();
}
<span class="type">void</span> Main<span class="operator">::</span>init()
{
clear();
<span class="keyword">static</span> <span class="type">int</span> r<span class="operator">=</span><span class="number">24</span>;
qsrand(<span class="operator">+</span><span class="operator">+</span>r);
mainCount<span class="operator">+</span><span class="operator">+</span>;
butterflyimg <span class="operator">=</span> <span class="number">0</span>;
logoimg <span class="operator">=</span> <span class="number">0</span>;
<span class="type">int</span> i;
<span class="keyword">for</span> ( i<span class="operator">=</span><span class="number">0</span>; i <span class="operator"><</span> <span class="type">int</span>(canvas<span class="operator">.</span>width()) <span class="operator">/</span> <span class="number">56</span>; i<span class="operator">+</span><span class="operator">+</span>) {
addButterfly();
}
<span class="keyword">for</span> ( i<span class="operator">=</span><span class="number">0</span>; i <span class="operator"><</span> <span class="type">int</span>(canvas<span class="operator">.</span>width()) <span class="operator">/</span> <span class="number">85</span>; i<span class="operator">+</span><span class="operator">+</span>) {
addHexagon();
}
<span class="keyword">for</span> ( i<span class="operator">=</span><span class="number">0</span>; i <span class="operator"><</span> <span class="type">int</span>(canvas<span class="operator">.</span>width()) <span class="operator">/</span> <span class="number">128</span>; i<span class="operator">+</span><span class="operator">+</span>) {
addLogo();
}
}
Main<span class="operator">::</span><span class="operator">~</span>Main()
{
<span class="preprocessor">#if !defined(Q_OS_SYMBIAN)</span>
<span class="keyword">delete</span> printer;
<span class="preprocessor">#endif</span>
<span class="keyword">if</span> ( <span class="operator">!</span><span class="operator">-</span><span class="operator">-</span>mainCount ) {
<span class="keyword">delete</span><span class="operator">[</span><span class="operator">]</span> butterflyimg;
butterflyimg <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">delete</span><span class="operator">[</span><span class="operator">]</span> logoimg;
logoimg <span class="operator">=</span> <span class="number">0</span>;
}
}
<span class="type">void</span> Main<span class="operator">::</span>newView()
{
<span class="comment">// Open a new view... have it delete when closed.</span>
Main <span class="operator">*</span>m <span class="operator">=</span> <span class="keyword">new</span> Main(canvas<span class="operator">,</span> <span class="number">0</span>); <span class="comment">// AKr, Qt::WA_DeleteOnClose);</span>
m<span class="operator">-</span><span class="operator">></span>show();
}
<span class="type">void</span> Main<span class="operator">::</span>clear()
{
editor<span class="operator">-</span><span class="operator">></span>clear();
}
<span class="type">void</span> Main<span class="operator">::</span>help()
{
<span class="keyword">static</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">*</span> about <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span>( <span class="string">"Qt Canvas Example"</span><span class="operator">,</span>
<span class="string">"<h3>The QCanvas classes example</h3>"</span>
<span class="string">"<ul>"</span>
<span class="string">"<li> Press ALT-S for some sprites."</span>
<span class="string">"<li> Press ALT-C for some circles."</span>
<span class="string">"<li> Press ALT-L for some lines."</span>
<span class="string">"<li> Drag the objects around."</span>
<span class="string">"<li> Read the code!"</span>
<span class="string">"</ul>"</span><span class="operator">,</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Information<span class="operator">,</span> <span class="number">1</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="keyword">this</span><span class="operator">,</span> <span class="number">0</span>);
about<span class="operator">-</span><span class="operator">></span>setButtonText( <span class="number">1</span><span class="operator">,</span> <span class="string">"Dismiss"</span> );
about<span class="operator">-</span><span class="operator">></span>show();
}
<span class="type">void</span> Main<span class="operator">::</span>aboutQt()
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>aboutQt( <span class="keyword">this</span><span class="operator">,</span> <span class="string">"Qt Canvas Example"</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>enlarge()
{
canvas<span class="operator">.</span>setSceneRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> canvas<span class="operator">.</span>width()<span class="operator">*</span><span class="number">4</span><span class="operator">/</span><span class="number">3</span><span class="operator">,</span> canvas<span class="operator">.</span>height()<span class="operator">*</span><span class="number">4</span><span class="operator">/</span><span class="number">3</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>shrink()
{
canvas<span class="operator">.</span>setSceneRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <a href="qtglobal.html#qMax">qMax</a>(canvas<span class="operator">.</span>width()<span class="operator">*</span><span class="number">3</span><span class="operator">/</span><span class="number">4</span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">1.0</span>))<span class="operator">,</span> <a href="qtglobal.html#qMax">qMax</a>(canvas<span class="operator">.</span>height()<span class="operator">*</span><span class="number">3</span><span class="operator">/</span><span class="number">4</span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">1.0</span>)));
}
<span class="type">void</span> Main<span class="operator">::</span>rotateClockwise()
{
editor<span class="operator">-</span><span class="operator">></span>rotate( <span class="number">22.5</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>rotateCounterClockwise()
{
editor<span class="operator">-</span><span class="operator">></span>rotate( <span class="operator">-</span><span class="number">22.5</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>zoomIn()
{
editor<span class="operator">-</span><span class="operator">></span>scale( <span class="number">2.0</span><span class="operator">,</span> <span class="number">2.0</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>zoomOut()
{
editor<span class="operator">-</span><span class="operator">></span>scale( <span class="number">0.5</span><span class="operator">,</span> <span class="number">0.5</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>mirror()
{
editor<span class="operator">-</span><span class="operator">></span>scale( <span class="operator">-</span><span class="number">1</span><span class="operator">,</span> <span class="number">1</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>moveL()
{
editor<span class="operator">-</span><span class="operator">></span>translate( <span class="operator">-</span><span class="number">16</span><span class="operator">,</span> <span class="number">0</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>moveR()
{
editor<span class="operator">-</span><span class="operator">></span>translate( <span class="operator">+</span><span class="number">16</span><span class="operator">,</span> <span class="number">0</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>moveU()
{
editor<span class="operator">-</span><span class="operator">></span>translate( <span class="number">0</span><span class="operator">,</span> <span class="operator">-</span><span class="number">16</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>moveD()
{
editor<span class="operator">-</span><span class="operator">></span>translate( <span class="number">0</span><span class="operator">,</span> <span class="operator">+</span><span class="number">16</span> );
}
<span class="type">void</span> Main<span class="operator">::</span>print()
{
<span class="preprocessor">#if !defined(Q_OS_SYMBIAN)</span>
<span class="keyword">if</span> ( <span class="operator">!</span>printer ) printer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qprinter.html">QPrinter</a></span>;
<span class="type"><a href="qprintdialog.html">QPrintDialog</a></span> dialog(printer<span class="operator">,</span> <span class="keyword">this</span>);
<span class="keyword">if</span>(dialog<span class="operator">.</span>exec()) {
<span class="type"><a href="qpainter.html">QPainter</a></span> pp(printer);
canvas<span class="operator">.</span>render(<span class="operator">&</span>pp);
}
<span class="preprocessor">#endif</span>
}
<span class="type">void</span> Main<span class="operator">::</span>addSprite()
{
BouncyLogo<span class="operator">*</span> i <span class="operator">=</span> <span class="keyword">new</span> BouncyLogo;
canvas<span class="operator">.</span>addItem(i);
i<span class="operator">-</span><span class="operator">></span>initPos();
i<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span>);
}
<span class="type"><a href="qstring.html">QString</a></span> butterfly_fn;
<span class="type"><a href="qstring.html">QString</a></span> logo_fn;
<span class="type">void</span> Main<span class="operator">::</span>addButterfly()
{
<span class="keyword">if</span> ( butterfly_fn<span class="operator">.</span>isEmpty() )
<span class="keyword">return</span>;
<span class="keyword">if</span> ( <span class="operator">!</span>butterflyimg ) {
butterflyimg <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">[</span><span class="number">4</span><span class="operator">]</span>;
butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>load( butterfly_fn );
butterflyimg<span class="operator">[</span><span class="number">1</span><span class="operator">]</span> <span class="operator">=</span> butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>scaled( <span class="type">int</span>(butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>width()<span class="operator">*</span><span class="number">0.75</span>)<span class="operator">,</span>
<span class="type">int</span>(butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>height()<span class="operator">*</span><span class="number">0.75</span>)<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>IgnoreAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);
butterflyimg<span class="operator">[</span><span class="number">2</span><span class="operator">]</span> <span class="operator">=</span> butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>scaled( <span class="type">int</span>(butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>width()<span class="operator">*</span><span class="number">0.5</span>)<span class="operator">,</span>
<span class="type">int</span>(butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>height()<span class="operator">*</span><span class="number">0.5</span>)<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>IgnoreAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);
butterflyimg<span class="operator">[</span><span class="number">3</span><span class="operator">]</span> <span class="operator">=</span> butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>scaled( <span class="type">int</span>(butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>width()<span class="operator">*</span><span class="number">0.25</span>)<span class="operator">,</span>
<span class="type">int</span>(butterflyimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>height()<span class="operator">*</span><span class="number">0.25</span>)<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>IgnoreAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);
}
<span class="type"><a href="qabstractgraphicsshapeitem.html">QAbstractGraphicsShapeItem</a></span><span class="operator">*</span> i <span class="operator">=</span> <span class="keyword">new</span> ImageItem(butterflyimg<span class="operator">[</span>qrand()<span class="operator">%</span><span class="number">4</span><span class="operator">]</span>);
canvas<span class="operator">.</span>addItem(i);
i<span class="operator">-</span><span class="operator">></span>setPos(qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width()<span class="operator">-</span>butterflyimg<span class="operator">-</span><span class="operator">></span>width())<span class="operator">,</span>
qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height()<span class="operator">-</span>butterflyimg<span class="operator">-</span><span class="operator">></span>height()));
i<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span><span class="operator">+</span><span class="number">250</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>addLogo()
{
<span class="keyword">if</span> ( logo_fn<span class="operator">.</span>isEmpty() )
<span class="keyword">return</span>;
<span class="keyword">if</span> ( <span class="operator">!</span>logoimg ) {
logoimg <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">[</span><span class="number">4</span><span class="operator">]</span>;
logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>load( logo_fn );
logoimg<span class="operator">[</span><span class="number">1</span><span class="operator">]</span> <span class="operator">=</span> logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>scaled( <span class="type">int</span>(logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>width()<span class="operator">*</span><span class="number">0.75</span>)<span class="operator">,</span>
<span class="type">int</span>(logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>height()<span class="operator">*</span><span class="number">0.75</span>)<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>IgnoreAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);
logoimg<span class="operator">[</span><span class="number">2</span><span class="operator">]</span> <span class="operator">=</span> logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>scaled( <span class="type">int</span>(logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>width()<span class="operator">*</span><span class="number">0.5</span>)<span class="operator">,</span>
<span class="type">int</span>(logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>height()<span class="operator">*</span><span class="number">0.5</span>)<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>IgnoreAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);
logoimg<span class="operator">[</span><span class="number">3</span><span class="operator">]</span> <span class="operator">=</span> logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>scaled( <span class="type">int</span>(logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>width()<span class="operator">*</span><span class="number">0.25</span>)<span class="operator">,</span>
<span class="type">int</span>(logoimg<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">.</span>height()<span class="operator">*</span><span class="number">0.25</span>)<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>IgnoreAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);
}
<span class="type"><a href="qabstractgraphicsshapeitem.html">QAbstractGraphicsShapeItem</a></span><span class="operator">*</span> i <span class="operator">=</span> <span class="keyword">new</span> ImageItem(logoimg<span class="operator">[</span>qrand()<span class="operator">%</span><span class="number">4</span><span class="operator">]</span>);
canvas<span class="operator">.</span>addItem(i);
i<span class="operator">-</span><span class="operator">></span>setPos(qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width()<span class="operator">-</span>logoimg<span class="operator">-</span><span class="operator">></span>width())<span class="operator">,</span>
qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height()<span class="operator">-</span>logoimg<span class="operator">-</span><span class="operator">></span>width()));
i<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span><span class="operator">+</span><span class="number">256</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>addCircle()
{
<span class="type"><a href="qabstractgraphicsshapeitem.html">QAbstractGraphicsShapeItem</a></span><span class="operator">*</span> i <span class="operator">=</span> canvas<span class="operator">.</span>addEllipse(<span class="type"><a href="qrectf.html">QRectF</a></span>(<span class="number">0</span><span class="operator">,</span><span class="number">0</span><span class="operator">,</span><span class="number">50</span><span class="operator">,</span><span class="number">50</span>));
i<span class="operator">-</span><span class="operator">></span>setFlag(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemIsMovable);
i<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen);
i<span class="operator">-</span><span class="operator">></span>setBrush( <span class="type"><a href="qcolor.html">QColor</a></span>(qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span>) );
i<span class="operator">-</span><span class="operator">></span>setPos(qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width())<span class="operator">,</span>qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height()));
i<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>addHexagon()
{
<span class="keyword">const</span> <span class="type">int</span> size <span class="operator">=</span> <span class="type">int</span>(canvas<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">25</span>);
<span class="type"><a href="qpolygon.html">QPolygon</a></span> polygon;
polygon <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">2</span><span class="operator">*</span>size<span class="operator">,</span><span class="number">0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">,</span><span class="operator">-</span>size<span class="operator">*</span><span class="number">173</span><span class="operator">/</span><span class="number">100</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="operator">-</span>size<span class="operator">,</span><span class="operator">-</span>size<span class="operator">*</span><span class="number">173</span><span class="operator">/</span><span class="number">100</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="operator">-</span><span class="number">2</span><span class="operator">*</span>size<span class="operator">,</span><span class="number">0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="operator">-</span>size<span class="operator">,</span>size<span class="operator">*</span><span class="number">173</span><span class="operator">/</span><span class="number">100</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">,</span>size<span class="operator">*</span><span class="number">173</span><span class="operator">/</span><span class="number">100</span>);
<span class="type"><a href="qgraphicspolygonitem.html">QGraphicsPolygonItem</a></span><span class="operator">*</span> i <span class="operator">=</span> canvas<span class="operator">.</span>addPolygon(polygon);
i<span class="operator">-</span><span class="operator">></span>setFlag(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemIsMovable);
i<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen);
i<span class="operator">-</span><span class="operator">></span>setBrush( <span class="type"><a href="qcolor.html">QColor</a></span>(qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span>) );
i<span class="operator">-</span><span class="operator">></span>setPos(qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width())<span class="operator">,</span>qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height()));
i<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>addPolygon()
{
<span class="keyword">const</span> <span class="type">int</span> size <span class="operator">=</span> <span class="type">int</span>(canvas<span class="operator">.</span>width()<span class="operator">/</span><span class="number">2</span>);
<span class="type"><a href="qpolygon.html">QPolygon</a></span> polygon;
polygon <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">0</span><span class="operator">,</span><span class="number">0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">,</span>size<span class="operator">/</span><span class="number">5</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">*</span><span class="number">4</span><span class="operator">/</span><span class="number">5</span><span class="operator">,</span>size)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">/</span><span class="number">6</span><span class="operator">,</span>size<span class="operator">*</span><span class="number">5</span><span class="operator">/</span><span class="number">4</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">*</span><span class="number">3</span><span class="operator">/</span><span class="number">4</span><span class="operator">,</span>size<span class="operator">*</span><span class="number">3</span><span class="operator">/</span><span class="number">4</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">*</span><span class="number">3</span><span class="operator">/</span><span class="number">4</span><span class="operator">,</span>size<span class="operator">/</span><span class="number">4</span>);
<span class="type"><a href="qgraphicspolygonitem.html">QGraphicsPolygonItem</a></span><span class="operator">*</span> i <span class="operator">=</span> canvas<span class="operator">.</span>addPolygon(polygon);
i<span class="operator">-</span><span class="operator">></span>setFlag(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemIsMovable);
i<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen);
i<span class="operator">-</span><span class="operator">></span>setBrush( <span class="type"><a href="qcolor.html">QColor</a></span>(qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span>) );
i<span class="operator">-</span><span class="operator">></span>setPos(qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width())<span class="operator">,</span>qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height()));
i<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>addSpline()
{
<span class="keyword">const</span> <span class="type">int</span> size <span class="operator">=</span> <span class="type">int</span>(canvas<span class="operator">.</span>width()<span class="operator">/</span><span class="number">6</span>);
<span class="type"><a href="qpolygon.html">QPolygon</a></span> polygon;
polygon <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">0</span><span class="operator">,</span><span class="number">0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">/</span><span class="number">2</span><span class="operator">,</span><span class="number">0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">,</span>size<span class="operator">/</span><span class="number">2</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">,</span>size)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">,</span>size<span class="operator">*</span><span class="number">3</span><span class="operator">/</span><span class="number">2</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">/</span><span class="number">2</span><span class="operator">,</span>size<span class="operator">*</span><span class="number">2</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">0</span><span class="operator">,</span>size<span class="operator">*</span><span class="number">2</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="operator">-</span>size<span class="operator">/</span><span class="number">2</span><span class="operator">,</span>size<span class="operator">*</span><span class="number">2</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(size<span class="operator">/</span><span class="number">4</span><span class="operator">,</span>size<span class="operator">*</span><span class="number">3</span><span class="operator">/</span><span class="number">2</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">0</span><span class="operator">,</span>size)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="operator">-</span>size<span class="operator">/</span><span class="number">4</span><span class="operator">,</span>size<span class="operator">/</span><span class="number">2</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="operator">-</span>size<span class="operator">/</span><span class="number">2</span><span class="operator">,</span><span class="number">0</span>);
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path;
path<span class="operator">.</span>moveTo(polygon<span class="operator">[</span><span class="number">0</span><span class="operator">]</span>);
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">1</span>; i <span class="operator"><</span> polygon<span class="operator">.</span>size(); i <span class="operator">+</span><span class="operator">=</span> <span class="number">3</span>)
path<span class="operator">.</span>cubicTo(polygon<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> polygon<span class="operator">[</span>(i <span class="operator">+</span> <span class="number">1</span>) <span class="operator">%</span> polygon<span class="operator">.</span>size()<span class="operator">]</span><span class="operator">,</span> polygon<span class="operator">[</span>(i <span class="operator">+</span> <span class="number">2</span>) <span class="operator">%</span> polygon<span class="operator">.</span>size()<span class="operator">]</span>);
<span class="type"><a href="qgraphicspathitem.html">QGraphicsPathItem</a></span><span class="operator">*</span> item <span class="operator">=</span> canvas<span class="operator">.</span>addPath(path);
item<span class="operator">-</span><span class="operator">></span>setFlag(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemIsMovable);
item<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen);
item<span class="operator">-</span><span class="operator">></span>setBrush( <span class="type"><a href="qcolor.html">QColor</a></span>(qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span>) );
item<span class="operator">-</span><span class="operator">></span>setPos(qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width())<span class="operator">,</span>qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height()));
item<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>addText()
{
<span class="type"><a href="qgraphicstextitem.html">QGraphicsTextItem</a></span><span class="operator">*</span> i <span class="operator">=</span> canvas<span class="operator">.</span>addText(<span class="string">"QCanvasText"</span>);
i<span class="operator">-</span><span class="operator">></span>setFlag(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemIsMovable);
i<span class="operator">-</span><span class="operator">></span>setPos(qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width())<span class="operator">,</span>qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height()));
i<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>addLine()
{
<span class="type"><a href="qgraphicslineitem.html">QGraphicsLineItem</a></span><span class="operator">*</span> i <span class="operator">=</span> canvas<span class="operator">.</span>addLine(<span class="type"><a href="qlinef.html">QLineF</a></span>( qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width())<span class="operator">,</span> qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height())<span class="operator">,</span>
qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width())<span class="operator">,</span> qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height()) ));
i<span class="operator">-</span><span class="operator">></span>setFlag(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemIsMovable);
i<span class="operator">-</span><span class="operator">></span>setPen( <span class="type"><a href="qpen.html">QPen</a></span>(<span class="type"><a href="qcolor.html">QColor</a></span>(qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span>)<span class="operator">,</span> <span class="number">6</span>) );
i<span class="operator">-</span><span class="operator">></span>setZValue(qrand()<span class="operator">%</span><span class="number">256</span>);
}
<span class="type">void</span> Main<span class="operator">::</span>addMesh()
{
<span class="type">int</span> x0 <span class="operator">=</span> <span class="number">0</span>;
<span class="type">int</span> y0 <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">if</span> ( <span class="operator">!</span>tb ) tb <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbrush.html">QBrush</a></span>( <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>red );
<span class="keyword">if</span> ( <span class="operator">!</span>tp ) tp <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpen.html">QPen</a></span>( <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black );
<span class="type">int</span> nodecount <span class="operator">=</span> <span class="number">0</span>;
<span class="type">int</span> w <span class="operator">=</span> <span class="type">int</span>(canvas<span class="operator">.</span>width());
<span class="type">int</span> h <span class="operator">=</span> <span class="type">int</span>(canvas<span class="operator">.</span>height());
<span class="keyword">const</span> <span class="type">int</span> dist <span class="operator">=</span> <span class="number">30</span>;
<span class="type">int</span> rows <span class="operator">=</span> h <span class="operator">/</span> dist;
<span class="type">int</span> cols <span class="operator">=</span> w <span class="operator">/</span> dist;
<span class="preprocessor">#ifndef QT_NO_PROGRESSDIALOG</span>
<span class="type"><a href="qprogressdialog.html">QProgressDialog</a></span> progress(<span class="string">"Creating mesh..."</span><span class="operator">,</span> <span class="string">"Abort"</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> rows<span class="operator">,</span> <span class="keyword">this</span>);
<span class="preprocessor">#endif</span>
canvas<span class="operator">.</span>update();
<span class="type"><a href="qvector.html">QVector</a></span><span class="operator"><</span>NodeItem<span class="operator">*</span><span class="operator">></span> lastRow(cols);
<span class="keyword">for</span> ( <span class="type">int</span> j <span class="operator">=</span> <span class="number">0</span>; j <span class="operator"><</span> rows; j<span class="operator">+</span><span class="operator">+</span> ) {
<span class="type">int</span> n <span class="operator">=</span> j<span class="operator">%</span><span class="number">2</span> <span class="operator">?</span> cols<span class="operator">-</span><span class="number">1</span> : cols;
NodeItem <span class="operator">*</span>prev <span class="operator">=</span> <span class="number">0</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> n; i<span class="operator">+</span><span class="operator">+</span> ) {
NodeItem <span class="operator">*</span>el <span class="operator">=</span> <span class="keyword">new</span> NodeItem;
canvas<span class="operator">.</span>addItem(el);
nodecount<span class="operator">+</span><span class="operator">+</span>;
<span class="type">int</span> r <span class="operator">=</span> qrand();
<span class="type">int</span> xrand <span class="operator">=</span> r <span class="operator">%</span><span class="number">20</span>;
<span class="type">int</span> yrand <span class="operator">=</span> (r<span class="operator">/</span><span class="number">20</span>) <span class="operator">%</span><span class="number">20</span>;
el<span class="operator">-</span><span class="operator">></span>setPos( xrand <span class="operator">+</span> x0 <span class="operator">+</span> i<span class="operator">*</span>dist <span class="operator">+</span> (j<span class="operator">%</span><span class="number">2</span> <span class="operator">?</span> dist<span class="operator">/</span><span class="number">2</span> : <span class="number">0</span> )<span class="operator">,</span>
yrand <span class="operator">+</span> y0 <span class="operator">+</span> j<span class="operator">*</span>dist );
<span class="keyword">if</span> ( j <span class="operator">></span> <span class="number">0</span> ) {
<span class="keyword">if</span> ( i <span class="operator"><</span> cols<span class="operator">-</span><span class="number">1</span> )
canvas<span class="operator">.</span>addItem(<span class="keyword">new</span> EdgeItem( lastRow<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> el));
<span class="keyword">if</span> ( j<span class="operator">%</span><span class="number">2</span> )
canvas<span class="operator">.</span>addItem(<span class="keyword">new</span> EdgeItem( lastRow<span class="operator">[</span>i<span class="operator">+</span><span class="number">1</span><span class="operator">]</span><span class="operator">,</span> el));
<span class="keyword">else</span> <span class="keyword">if</span> ( i <span class="operator">></span> <span class="number">0</span> )
canvas<span class="operator">.</span>addItem(<span class="keyword">new</span> EdgeItem( lastRow<span class="operator">[</span>i<span class="operator">-</span><span class="number">1</span><span class="operator">]</span><span class="operator">,</span> el));
}
<span class="keyword">if</span> ( prev ) {
canvas<span class="operator">.</span>addItem(<span class="keyword">new</span> EdgeItem( prev<span class="operator">,</span> el));
}
<span class="keyword">if</span> ( i <span class="operator">></span> <span class="number">0</span> ) lastRow<span class="operator">[</span>i<span class="operator">-</span><span class="number">1</span><span class="operator">]</span> <span class="operator">=</span> prev;
prev <span class="operator">=</span> el;
}
lastRow<span class="operator">[</span>n<span class="operator">-</span><span class="number">1</span><span class="operator">]</span><span class="operator">=</span>prev;
<span class="preprocessor">#ifndef QT_NO_PROGRESSDIALOG</span>
progress<span class="operator">.</span>setValue( j );
<span class="keyword">if</span> ( progress<span class="operator">.</span>wasCanceled() )
<span class="keyword">break</span>;
<span class="preprocessor">#endif</span>
}
<span class="preprocessor">#ifndef QT_NO_PROGRESSDIALOG</span>
progress<span class="operator">.</span>setValue( rows );
<span class="preprocessor">#endif</span>
<span class="comment">// qDebug( "%d nodes, %d edges", nodecount, EdgeItem::count() );</span>
}
<span class="type">void</span> Main<span class="operator">::</span>addRectangle()
{
<span class="type"><a href="qabstractgraphicsshapeitem.html">QAbstractGraphicsShapeItem</a></span> <span class="operator">*</span>i <span class="operator">=</span> canvas<span class="operator">.</span>addRect( <span class="type"><a href="qrectf.html">QRectF</a></span>(qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>width())<span class="operator">,</span>
qrand()<span class="operator">%</span><span class="type">int</span>(canvas<span class="operator">.</span>height())<span class="operator">,</span>
canvas<span class="operator">.</span>width()<span class="operator">/</span><span class="number">5</span><span class="operator">,</span>
canvas<span class="operator">.</span>width()<span class="operator">/</span><span class="number">5</span>) );
i<span class="operator">-</span><span class="operator">></span>setFlag(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemIsMovable);
<span class="type">int</span> z <span class="operator">=</span> qrand()<span class="operator">%</span><span class="number">256</span>;
i<span class="operator">-</span><span class="operator">></span>setBrush( <span class="type"><a href="qcolor.html">QColor</a></span>(z<span class="operator">,</span>z<span class="operator">,</span>z) );
i<span class="operator">-</span><span class="operator">></span>setPen( <span class="type"><a href="qpen.html">QPen</a></span>(<span class="type"><a href="qcolor.html">QColor</a></span>(qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span><span class="operator">,</span>qrand()<span class="operator">%</span><span class="number">32</span><span class="operator">*</span><span class="number">8</span>)<span class="operator">,</span> <span class="number">6</span>) );
i<span class="operator">-</span><span class="operator">></span>setZValue(z);
}</pre>
</div>
<!-- @@@graphicsview/portedcanvas/canvas.cpp -->
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subsidiaries. Documentation contributions included herein are the copyrights of
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The documentation provided herein is licensed under the terms of the
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License version 1.3</a> as published by the Free Software Foundation.</p>
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