?? cannon.cpp
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/******************************************************************** 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( 100, 100, s );}QSizePolicy CannonField::sizePolicy() const{ return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );}
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