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require 'Qt'
class DynamicTip < Qt::ToolTip
def initialize(p)
super(p)
end
def maybeTip(p)
if !parentWidget.inherits('TellMe')
return
end
r = parentWidget.tip(p)
if !r.isValid
return
end
s = 'position: ' + r.center.x.to_s + ', ' + r.center.y.to_s
tip(r,s)
end
end
class TellMe < Qt::Widget
def initialize
super
setMinimumSize(30, 30)
@r1 = randomRect
@r2 = randomRect
@r3 = randomRect
@t = DynamicTip.new(self)
Qt::ToolTip.add(self, @r3, 'this color is called red') #TT says this is helpful, I'm not so sure
end
def tip(point)
if (@r1.contains(point))
@r1
elsif (@r2.contains(point))
@r2
else
Qt::Rect.new(0,0, -1, -1)
end
end
def paintEvent(e)
p = Qt::Painter.new(self)
if (e.rect.intersects(@r1))
p.setBrush(Qt::blue)
p.drawRect(@r1)
end
if (e.rect.intersects(@r2))
p.setBrush(Qt::blue)
p.drawRect(@r2)
end
if (e.rect.intersects(@r3))
p.setBrush(Qt::red)
p.drawRect(@r3)
end
p.end
end
def mousePressEvent (e)
if (@r1.contains(e.pos))
@r1 = randomRect
end
if (@r2.contains(e.pos))
@r2 = randomRect
end
repaint
end
def resizeEvent(e)
unless rect.contains(@r1)
@r1 = randomRect
end
unless rect.contains(@r2)
@r2 = randomRect
end
end
def randomRect
Qt::Rect.new(rand(width - 20), rand(height - 20), 20, 20)
end
end
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