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from OpenGL.GLUT import *
class MouseDragMonitor:
def __init__(self, button, callback):
self.button = button
self.callback = callback
self.active = False
def on_mouse(self, button, state, x, y):
if button == self.button:
self.active = (state == GLUT_DOWN)
self.last_x = x
self.last_y = y
def on_mouse_move(self, x, y):
if self.active:
delta_x = self.last_x - x
delta_y = y - self.last_y
self.last_x = x
self.last_y = y
self.callback(delta_x, delta_y)
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