You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
qt3/tutorial/t8/cannon.cpp

46 lines
910 B

/****************************************************************
**
** Implementation CannonField class, Qt tutorial 8
**
****************************************************************/
#include "cannon.h"
#include <qpainter.h>
CannonField::CannonField( QWidget *parent, const char *name )
: QWidget( parent, name )
{
ang = 45;
setPalette( QPalette( QColor( 250, 250, 200) ) );
}
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 * )
{
QString s = "Angle = " + QString::number( ang );
QPainter p( this );
p.drawText( 200, 200, s );
}
QSizePolicy CannonField::sizePolicy() const
{
return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
}