1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
require 'Qt4'
class CannonField < Qt::Widget
signals 'angleChanged(int)'
slots 'setAngle(int)'
def initialize(parent = nil)
super
@currentAngle = 45
setPalette( Qt::Palette.new( Qt::Color.new( 250, 250, 200) ) )
setAutoFillBackground(true)
end
def setAngle( degrees )
if degrees < 5
degrees = 5
elsif degrees > 70
degrees = 70
end
if @currentAngle == degrees
return
end
@currentAngle = degrees
repaint()
emit angleChanged( @currentAngle )
end
def paintEvent( event )
p = Qt::Painter.new( self )
p.drawText( 200, 200, "Angle = %d" % @currentAngle )
p.end()
end
def sizePolicy()
return Qt::SizePolicy.new( Qt::SizePolicy::Expanding, Qt::SizePolicy::Expanding )
end
end
|
