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# t9/cannon.cpp Example File

    /****************************************************************
    **
    ** Implementation CannonField class, TQt tutorial 9
    **
    ****************************************************************/

    #include "cannon.h"
    #include <tqpainter.h>

    CannonField::CannonField( TQWidget *parent, const char *name )
            : TQWidget( parent, name )
    {
        ang = 45;
        setPalette( TQPalette( TQColor( 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( TQPaintEvent * )
    {
        TQPainter p( this );

        p.setBrush( blue );
        p.setPen( NoPen );

        p.translate( 0, rect().bottom() );
        p.drawPie( TQRect(-35, -35, 70, 70), 0, 90*16 );
        p.rotate( -ang );
        p.drawRect( TQRect(33, -4, 15, 8) );
    }

    TQSizePolicy CannonField::sizePolicy() const
    {
        return TQSizePolicy( TQSizePolicy::Expanding, TQSizePolicy::Expanding );
    }