require 'Qt' class CannonField < TQt::Widget signals 'angleChanged(int)' slots 'setAngle(int)' def initialize(parent, name) super @ang = 45 setPalette( TQt::Palette.new( TQt::Color.new( 250, 250, 200) ) ) end def setAngle( degrees ) if degrees < 5 degrees = 5 elsif degrees > 70 degrees = 70 end if @ang == degrees return end @ang = degrees repaint() emit angleChanged( @ang ) end def paintEvent( event ) p = TQt::Painter.new( self ) p.setBrush( blue ) p.setPen( TQt::NoPen ) p.translate( 0, rect().bottom() ) p.drawPie( TQt::Rect.new(-35, -35, 70, 70), 0, 90*16 ) p.rotate( - @ang ) p.drawRect( TQt::Rect.new(33, -4, 15, 8) ) p.end() end def sizePolicy() return TQt::SizePolicy.new( TQt::SizePolicy::Expanding, TQt::SizePolicy::Expanding ) end end