simple clutter drag_action test

dragaction.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from gi.repository import Clutter

def drag_begin_cb (action, actor, event_x, event_y, modifiers, arg = None):
    print "DRAG START\t", event_x, event_y, arg
    if arg:
        action.set_drag_handle (arg)

def drag_end_cb (action, actor, event_x, event_y, modifiers):
    print "DRAG END\t\t", event_x, event_y

def drag_progress_cb (action, actor, delta_x, delta_y):
    print "DRAG:\t", delta_x, delta_y
    return True

if __name__ == '__main__':
    Clutter.init(None)
    stage = Clutter.Stage.get_default()
    stage.set_size(500, 500)
    stage.set_color(Clutter.Color.new(0,255,0,0))

    scroll = Clutter.Group()
    scroll.set_size(250, 500)
    scroll.set_position (250, 0)
    stage.add_actor (scroll)
    for i in range (10):
        for j in range (3):
            actor = Clutter.Rectangle()
            actor.set_size (30, 30)
            actor.set_border_width (5)
            actor.set_color  (Clutter.Color.new (255,0,0,200))
            actor.set_position (i*30,100 + j*30)

            action = Clutter.DragAction()
            action.connect ("drag-begin", drag_begin_cb, scroll)
            action.connect ("drag-end",   drag_end_cb)
            action.connect ("drag-progress",drag_progress_cb)
            actor.add_action (action)
            actor.set_reactive (True)

            scroll.add_actor (actor)

    stage.show_all()
    stage.connect('destroy', Clutter.main_quit)
    Clutter.main()