def GetDeltaAngle(self):
radius = 60.0
pos = wx.GetMousePosition()
d = pos - self.motion_reference
self.motion_reference = pos
self.CalcRotationVector(d.x, d.y)
arc = math.sqrt(d.x**2 + d.y**2)
return arc / radius
def OnLeftDown(self, evt):
self.motion_reference = wx.GetMousePosition()
self.dragging = True
