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51 lines
1.0 KiB
51 lines
1.0 KiB
/****************************************************************
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**
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** Implementation CannonField class, Qt tutorial 9
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**
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****************************************************************/
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#include "cannon.h"
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#include <qpainter.h>
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CannonField::CannonField( QWidget *parent, const char *name )
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: QWidget( parent, name )
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{
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ang = 45;
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setPalette( QPalette( QColor( 250, 250, 200) ) );
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}
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void 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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repaint();
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emit angleChanged( ang );
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}
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void CannonField::paintEvent( QPaintEvent * )
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{
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QPainter p( this );
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p.setBrush( blue );
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p.setPen( NoPen );
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p.translate( 0, rect().bottom() );
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p.drawPie( QRect(-35, -35, 70, 70), 0, 90*16 );
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p.rotate( -ang );
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p.drawRect( QRect(33, -4, 15, 8) );
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}
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QSizePolicy CannonField::sizePolicy() const
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{
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return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
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}
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