You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
197 lines
6.9 KiB
197 lines
6.9 KiB
13 years ago
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
|
||
|
|
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/forever/forever.doc:5 -->
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||
|
|
<title>A Rectangle Draw "Benchmark"</title>
|
||
|
|
<style type="text/css"><!--
|
||
|
|
fn { margin-left: 1cm; text-indent: -1cm; }
|
||
|
|
a:link { color: #004faf; text-decoration: none }
|
||
|
|
a:visited { color: #672967; text-decoration: none }
|
||
|
|
body { background: #ffffff; color: black; }
|
||
|
|
--></style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<table border="0" cellpadding="0" cellspacing="0" width="100%">
|
||
|
|
<tr bgcolor="#E5E5E5">
|
||
|
|
<td valign=center>
|
||
|
|
<a href="index.html">
|
||
|
|
<font color="#004faf">Home</font></a>
|
||
|
|
| <a href="classes.html">
|
||
|
|
<font color="#004faf">All Classes</font></a>
|
||
|
|
| <a href="mainclasses.html">
|
||
|
|
<font color="#004faf">Main Classes</font></a>
|
||
|
|
| <a href="annotated.html">
|
||
|
|
<font color="#004faf">Annotated</font></a>
|
||
|
|
| <a href="groups.html">
|
||
|
|
<font color="#004faf">Grouped Classes</font></a>
|
||
|
|
| <a href="functions.html">
|
||
|
|
<font color="#004faf">Functions</font></a>
|
||
|
|
</td>
|
||
|
|
<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>A Rectangle Draw "Benchmark"</h1>
|
||
|
|
|
||
|
|
|
||
|
|
<p>
|
||
|
|
This example continuously draws rectangles in a window and
|
||
|
|
has another widget that counts the number of rectangles that
|
||
|
|
are drawn per second.
|
||
|
|
<p> <hr>
|
||
|
|
<p> Header file:
|
||
|
|
<p> <pre>/****************************************************************************
|
||
|
|
** $Id: qt/forever.h 3.3.8 edited Jan 11 14:46 $
|
||
|
|
**
|
||
|
|
** Definition of something or other
|
||
|
|
**
|
||
|
|
** Created : 979899
|
||
|
|
**
|
||
|
|
** Copyright (C) 1997-2007 Trolltech ASA. All rights reserved.
|
||
|
|
**
|
||
|
|
** This file is part of an example program for TQt. This example
|
||
|
|
** program may be used, distributed and modified without limitation.
|
||
|
|
**
|
||
|
|
*****************************************************************************/
|
||
|
|
|
||
|
|
#ifndef FOREVER_H
|
||
|
|
#define FOREVER_H
|
||
|
|
|
||
|
|
#include <<a href="qwidget-h.html">qwidget.h</a>>
|
||
|
|
|
||
|
|
|
||
|
|
const int numColors = 120;
|
||
|
|
|
||
|
|
|
||
|
|
class Forever : public <a href="qwidget.html">TQWidget</a>
|
||
|
|
{
|
||
|
|
<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
|
||
|
|
public:
|
||
|
|
Forever( <a href="qwidget.html">TQWidget</a> *parent=0, const char *name=0 );
|
||
|
|
protected:
|
||
|
|
void paintEvent( <a href="qpaintevent.html">TQPaintEvent</a> * );
|
||
|
|
void timerEvent( <a href="qtimerevent.html">TQTimerEvent</a> * );
|
||
|
|
private slots:
|
||
|
|
void updateCaption();
|
||
|
|
private:
|
||
|
|
int rectangles;
|
||
|
|
TQColor colors[numColors];
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p> <hr>
|
||
|
|
<p> Implementation:
|
||
|
|
<p> <pre>/****************************************************************************
|
||
|
|
** $Id: qt/forever.cpp 3.3.8 edited Jan 11 14:37 $
|
||
|
|
**
|
||
|
|
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
|
||
|
|
**
|
||
|
|
** This file is part of an example program for TQt. This example
|
||
|
|
** program may be used, distributed and modified without limitation.
|
||
|
|
**
|
||
|
|
*****************************************************************************/
|
||
|
|
|
||
|
|
#include <<a href="qtimer-h.html">qtimer.h</a>>
|
||
|
|
#include <<a href="qpainter-h.html">qpainter.h</a>>
|
||
|
|
#include <<a href="qapplication-h.html">qapplication.h</a>>
|
||
|
|
#include <stdlib.h> // defines rand() function
|
||
|
|
|
||
|
|
#include "forever.h"
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Forever - a widget that draws rectangles forever.
|
||
|
|
//
|
||
|
|
|
||
|
|
//
|
||
|
|
// Constructs a Forever widget.
|
||
|
|
//
|
||
|
|
|
||
|
|
<a name="f365"></a>Forever::Forever( <a href="qwidget.html">TQWidget</a> *parent, const char *name )
|
||
|
|
: <a href="qwidget.html">TQWidget</a>( parent, name )
|
||
|
|
{
|
||
|
|
for (int a=0; a<numColors; a++) {
|
||
|
|
colors[a] = TQColor( rand()&255,
|
||
|
|
rand()&255,
|
||
|
|
rand()&255 );
|
||
|
|
}
|
||
|
|
rectangles = 0;
|
||
|
|
<a href="qobject.html#startTimer">startTimer</a>( 0 ); // run continuous timer
|
||
|
|
<a href="qtimer.html">TQTimer</a> * counter = new <a href="qtimer.html">TQTimer</a>( this );
|
||
|
|
<a name="x1054"></a> <a href="qobject.html#connect">connect</a>( counter, SIGNAL(<a href="qtimer.html#timeout">timeout</a>()),
|
||
|
|
this, SLOT(updateCaption()) );
|
||
|
|
<a name="x1053"></a> counter-><a href="qtimer.html#start">start</a>( 1000 );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void <a name="f366"></a>Forever::updateCaption()
|
||
|
|
{
|
||
|
|
<a href="qstring.html">TQString</a> s;
|
||
|
|
<a name="x1052"></a> s.<a href="qstring.html#sprintf">sprintf</a>( "TQt Example - Forever - %d rectangles/second", rectangles );
|
||
|
|
rectangles = 0;
|
||
|
|
<a href="qwidget.html#setCaption">setCaption</a>( s );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Handles paint events for the Forever widget.
|
||
|
|
//
|
||
|
|
|
||
|
|
<a name="x1055"></a>void Forever::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">TQPaintEvent</a> * )
|
||
|
|
{
|
||
|
|
<a href="qpainter.html">TQPainter</a> paint( this ); // painter object
|
||
|
|
int w = <a href="qwidget.html#width">width</a>();
|
||
|
|
int h = <a href="qwidget.html#height">height</a>();
|
||
|
|
if(w <= 0 || h <= 0)
|
||
|
|
return;
|
||
|
|
paint.<a href="qpainter.html#setPen">setPen</a>( NoPen ); // do not draw outline
|
||
|
|
paint.<a href="qpainter.html#setBrush">setBrush</a>( colors[rand() % numColors]);// set random brush color
|
||
|
|
|
||
|
|
<a href="qpoint.html">TQPoint</a> p1( rand()%w, rand()%h ); // p1 = top left
|
||
|
|
<a href="qpoint.html">TQPoint</a> p2( rand()%w, rand()%h ); // p2 = bottom right
|
||
|
|
|
||
|
|
<a href="qrect.html">TQRect</a> r( p1, p2 );
|
||
|
|
paint.<a href="qpainter.html#drawRect">drawRect</a>( r ); // draw filled rectangle
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Handles timer events for the Forever widget.
|
||
|
|
//
|
||
|
|
|
||
|
|
<a name="x1048"></a>void Forever::<a href="qobject.html#timerEvent">timerEvent</a>( <a href="qtimerevent.html">TQTimerEvent</a> * )
|
||
|
|
{
|
||
|
|
for ( int i=0; i<100; i++ ) {
|
||
|
|
<a href="qwidget.html#repaint">repaint</a>( FALSE ); // repaint, don't erase
|
||
|
|
rectangles++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Create and display Forever widget.
|
||
|
|
//
|
||
|
|
|
||
|
|
int main( int argc, char **argv )
|
||
|
|
{
|
||
|
|
<a href="qapplication.html">TQApplication</a> a( argc, argv ); // create application object
|
||
|
|
Forever always; // create widget
|
||
|
|
always.<a href="qwidget.html#resize">resize</a>( 400, 250 ); // start up with size 400x250
|
||
|
|
a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &always ); // set as main widget
|
||
|
|
always.<a href="qwidget.html#setCaption">setCaption</a>("TQt Example - Forever");
|
||
|
|
always.<a href="qwidget.html#show">show</a>(); // show widget
|
||
|
|
return a.<a href="qapplication.html#exec">exec</a>(); // run event loop
|
||
|
|
}
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p>See also <a href="examples.html">Examples</a>.
|
||
|
|
|
||
|
|
<!-- eof -->
|
||
|
|
<p><address><hr><div align=center>
|
||
|
|
<table width=100% cellspacing=0 border=0><tr>
|
||
|
|
<td>Copyright © 2007
|
||
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
||
|
|
<td align=right><div align=right>TQt 3.3.8</div>
|
||
|
|
</table></div></address></body>
|
||
|
|
</html>
|