1 files changed, 38 insertions, 0 deletions
diff --git a/qtruby/rubylib/tutorial/t8/cannon.rb b/qtruby/rubylib/tutorial/t8/cannon.rb
new file mode 100644
index 00000000..b3202a93
--- /dev/null
+++ b/qtruby/rubylib/tutorial/t8/cannon.rb
@@ -0,0 +1,38 @@
+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 )
+		s = "Angle = #{@ang}"
+		p = Qt::Painter.new( self )
+		p.drawText( 200, 200, s )
+		p.end()
+	end
+
+
+	def sizePolicy()
+    	return Qt::SizePolicy.new( Qt::SizePolicy::Expanding, Qt::SizePolicy::Expanding )
+	end
+end