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+<title>t8/cannon.cpp Example File</title>
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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>t8/cannon.cpp Example File</h1>
+
+
+<pre>/****************************************************************
+**
+** Implementation CannonField class, Qt tutorial 8
+**
+****************************************************************/
+
+#include "cannon.h"
+#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
+
+
+<a name="f34"></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#setPalette">setPalette</a>( QPalette( QColor( 250, 250, 200) ) );
+}
+
+
+void <a name="f35"></a>CannonField::setAngle( int degrees )
+{
+ if ( degrees &lt; 5 )
+ degrees = 5;
+ if ( degrees &gt; 70 )
+ degrees = 70;
+ if ( ang == degrees )
+ return;
+ ang = degrees;
+ <a href="qwidget.html#repaint">repaint</a>();
+ emit angleChanged( ang );
+}
+
+
+void CannonField::<a href="qwidget.html#paintEvent">paintEvent</a>( <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#drawText">drawText</a>( 200, 200, s );
+}
+
+
+QSizePolicy CannonField::<a href="qwidget.html#sizePolicy">sizePolicy</a>() const
+{
+ return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
+}
+
+</pre><!-- eof -->
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+<td align=right><div align=right>Qt 3.3.8</div>
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