Source code for tutorial 9: cannon.cpp
/****************************************************************
**
** Implementation CannonField class, Qt tutorial 9
**
****************************************************************/
#include "cannon.h"
#include <qpainter.h>
CannonField::CannonField( QWidget *parent, const char *name )
: QWidget( parent, name )
{
ang = 45;
}
void CannonField::setAngle( int degrees )
{
if ( degrees < 5 )
degrees = 5;
if ( degrees > 70 )
degrees = 70;
if ( ang == degrees )
return;
ang = degrees;
repaint();
emit angleChanged( ang );
}
void CannonField::paintEvent( QPaintEvent * )
{
QPainter p;
QBrush brush( blue );
QPen pen( NoPen );
p.begin( this );
p.setBrush( brush );
p.setPen( pen );
p.translate( 0, rect().bottom() );
p.drawPie( QRect(-35, -35, 70, 70), 0, 90*16 );
p.rotate( -ang );
p.drawRect( QRect(33, -4, 15, 8) );
p.end();
}
Generated at 16:51, 1996/09/24 for Qt version 1.0 by the webmaster at Troll Tech