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| 32 | <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>
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| 33 |
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| 34 |
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| 35 | <pre>/****************************************************************
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| 36 | **
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| 37 | ** Implementation CannonField class, Qt tutorial 8
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| 38 | **
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| 39 | ****************************************************************/
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| 40 |
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| 41 | #include "cannon.h"
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| 42 | #include <<a href="qpainter-h.html">qpainter.h</a>>
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| 43 |
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| 44 |
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| 45 | <a name="f34"></a>CannonField::CannonField( <a href="qwidget.html">QWidget</a> *parent, const char *name )
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| 46 | : <a href="qwidget.html">QWidget</a>( parent, name )
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| 47 | {
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| 48 | ang = 45;
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| 49 | <a href="qwidget.html#setPalette">setPalette</a>( QPalette( QColor( 250, 250, 200) ) );
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| 50 | }
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| 51 |
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| 52 |
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| 53 | void <a name="f35"></a>CannonField::setAngle( int degrees )
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| 54 | {
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| 55 | if ( degrees < 5 )
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| 56 | degrees = 5;
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| 57 | if ( degrees > 70 )
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| 58 | degrees = 70;
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| 59 | if ( ang == degrees )
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| 60 | return;
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| 61 | ang = degrees;
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| 62 | <a href="qwidget.html#repaint">repaint</a>();
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| 63 | emit angleChanged( ang );
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| 64 | }
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| 65 |
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| 66 |
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| 67 | void CannonField::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a> * )
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| 68 | {
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| 69 | <a href="qstring.html">QString</a> s = "Angle = " + QString::number( ang );
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| 70 | <a href="qpainter.html">QPainter</a> p( this );
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| 71 | p.<a href="qpainter.html#drawText">drawText</a>( 200, 200, s );
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| 72 | }
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| 73 |
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| 74 |
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| 75 | QSizePolicy CannonField::<a href="qwidget.html#sizePolicy">sizePolicy</a>() const
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| 76 | {
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| 77 | return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
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| 78 | }
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| 79 |
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| 80 | </pre><!-- eof -->
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| 81 | <p><address><hr><div align=center>
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| 85 | <td align=right><div align=right>Qt 3.3.8</div>
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