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123 lines
4.2 KiB
123 lines
4.2 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/tutorial.doc:1301 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>t10/cannon.cpp Example File</title>
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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</td>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>t10/cannon.cpp Example File</h1>
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<pre>/****************************************************************
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**
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** Implementation CannonField class, Qt tutorial 10
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**
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****************************************************************/
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#include "cannon.h"
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#include <<a href="qpainter-h.html">qpainter.h</a>>
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#include <<a href="qpixmap-h.html">qpixmap.h</a>>
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<a name="f48"></a>CannonField::CannonField( <a href="qwidget.html">QWidget</a> *parent, const char *name )
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: <a href="qwidget.html">QWidget</a>( parent, name )
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{
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ang = 45;
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f = 0;
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<a href="qwidget.html#setPalette">setPalette</a>( QPalette( QColor( 250, 250, 200) ) );
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}
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void <a name="f49"></a>CannonField::setAngle( int degrees )
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{
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if ( degrees < 5 )
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degrees = 5;
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if ( degrees > 70 )
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degrees = 70;
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if ( ang == degrees )
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return;
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ang = degrees;
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<a href="qwidget.html#repaint">repaint</a>( cannonRect(), FALSE );
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emit angleChanged( ang );
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}
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void <a name="f50"></a>CannonField::setForce( int newton )
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{
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if ( newton < 0 )
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newton = 0;
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if ( f == newton )
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return;
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f = newton;
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emit forceChanged( f );
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}
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void CannonField::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a> *e )
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{
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if ( !e-><a href="qpaintevent.html#rect">rect</a>().intersects( cannonRect() ) )
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return;
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<a href="qrect.html">QRect</a> cr = cannonRect();
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<a href="qpixmap.html">QPixmap</a> pix( cr.<a href="qrect.html#size">size</a>() );
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pix.<a href="qpixmap.html#fill">fill</a>( this, cr.<a href="qrect.html#topLeft">topLeft</a>() );
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<a href="qpainter.html">QPainter</a> p( &pix );
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p.<a href="qpainter.html#setBrush">setBrush</a>( blue );
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p.<a href="qpainter.html#setPen">setPen</a>( NoPen );
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p.<a href="qpainter.html#translate">translate</a>( 0, pix.<a href="qpixmap.html#height">height</a>() - 1 );
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p.<a href="qpainter.html#drawPie">drawPie</a>( QRect( -35,-35, 70, 70 ), 0, 90*16 );
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p.<a href="qpainter.html#rotate">rotate</a>( -ang );
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p.<a href="qpainter.html#drawRect">drawRect</a>( QRect(33, -4, 15, 8) );
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p.<a href="qpainter.html#end">end</a>();
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p.<a href="qpainter.html#begin">begin</a>( this );
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p.<a href="qpainter.html#drawPixmap">drawPixmap</a>( cr.<a href="qrect.html#topLeft">topLeft</a>(), pix );
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}
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QRect <a name="f51"></a>CannonField::cannonRect() const
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{
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<a href="qrect.html">QRect</a> r( 0, 0, 50, 50 );
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r.<a href="qrect.html#moveBottomLeft">moveBottomLeft</a>( <a href="qwidget.html#rect">rect</a>().bottomLeft() );
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return r;
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}
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QSizePolicy CannonField::<a href="qwidget.html#sizePolicy">sizePolicy</a>() const
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{
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return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
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}
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</pre><!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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</table></div></address></body>
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