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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Tutorial - t8/cannon.cpp</title>
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<h1 align=center>Source code for <a href="t8.html">tutorial 8</a>: cannon.cpp</h1><br clear="all">
<hr> <pre>/****************************************************************
**
** Implementation CannonField class, Qt tutorial 8
**
****************************************************************/
#include "cannon.h"
#include <<a href="qpainter-h.html">qpainter.h</a>>
CannonField::CannonField( <a href="qwidget.html">QWidget</a> *parent, const char *name )
: <a href="qwidget.html">QWidget</a>( parent, name )
{
ang = 45;
<a href="qwidget.html#379ca0">setPalette</a>( <a href="qpalette.html">QPalette</a>( <a href="qcolor.html">QColor</a>( 250, 250, 200) ) );
}
void <a name="675"></a>CannonField::setAngle( int degrees )
{
if ( degrees < 5 )
degrees = 5;
if ( degrees > 70 )
degrees = 70;
if ( ang == degrees )
return;
ang = degrees;
<a href="qwidget.html#977d49">repaint</a>();
emit angleChanged( ang );
}
void <a name="676"></a>CannonField::paintEvent( <a href="qpaintevent.html">QPaintEvent</a> * )
{
<a href="qstring.html">QString</a> s = "Angle = " + QString::number( ang );
<a href="qpainter.html">QPainter</a> p( this );
p.<a href="qpainter.html#8a59ed">drawText</a>( 200, 200, s );
}
<a href="qsizepolicy.html">QSizePolicy</a> <a name="677"></a>CannonField::sizePolicy() const
{
return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
}
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