diff options
Diffstat (limited to 'qtruby/rubylib/tutorial/t9/cannon.rb')
-rw-r--r-- | qtruby/rubylib/tutorial/t9/cannon.rb | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/qtruby/rubylib/tutorial/t9/cannon.rb b/qtruby/rubylib/tutorial/t9/cannon.rb new file mode 100644 index 00000000..14bcc70f --- /dev/null +++ b/qtruby/rubylib/tutorial/t9/cannon.rb @@ -0,0 +1,43 @@ +require 'Qt' + +class CannonField < Qt::Widget + signals 'angleChanged(int)' + slots 'setAngle(int)' + + def initialize(parent, name) + super + @ang = 45 + setPalette( Qt::Palette.new( Qt::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 = Qt::Painter.new( self ) + + p.setBrush( blue ) + p.setPen( Qt::NoPen ) + p.translate( 0, rect().bottom() ) + p.drawPie( Qt::Rect.new(-35, -35, 70, 70), 0, 90*16 ) + p.rotate( - @ang ) + p.drawRect( Qt::Rect.new(33, -4, 15, 8) ) + p.end() + end + + + def sizePolicy() + return Qt::SizePolicy.new( Qt::SizePolicy::Expanding, Qt::SizePolicy::Expanding ) + end +end |