test/bumpmap.py

   1 """
   2 bumpmap.py - S.Fourmanoit <syfou@users.sourceforge.net>, 2005
   3
   4 Short, but more involved adesklets test script. It demonstrates
   5 Imlib2 dynamic filtering capabilities and how you can modify
   6 a background image dynamically.
   7
   8 Note: I strongly advise against using an effect that CPU intensive
   9 in real life desklets - remember adesklets was made to be 'light'.
  10
  11 To try it:
  12         - Install adesklets with python support enabled (default)
  13         - Run python bumpmap.py from this directory.
  14 """
  15 import adesklets
  16
  17 class My_Events(adesklets.Events_handler):
  18     x = 100     # Initial spot position
  19     y = 100
  20
  21     def __init__(self):
  22         adesklets.Events_handler.__init__(self)
  23
  24     def __del__(self):
  25         adesklets.Events_handler.__del__(self)
  26
  27     def ready(self):
  28         adesklets.window_resize(200,200)
  29         adesklets.window_set_background_image(adesklets.clone_image())
  30         adesklets.window_set_transparency(True)
  31         adesklets.window_reset(adesklets.WINDOW_MANAGED)
  32
  33         # Now, let us set a 'Test!' text on foreground image:
  34         # we will not modify it any more
  35         #
  36         adesklets.context_set_image(0)
  37         adesklets.context_set_font(adesklets.load_font('Vera/60'))
  38         adesklets.context_set_color(255,0,0,200)
  39         adesklets.context_set_direction(adesklets.TEXT_TO_ANGLE)
  40         adesklets.context_set_angle(45)
  41         adesklets.text_draw(20,0,'Test!')
  42         adesklets.free_font(0)
  43
  44         adesklets.window_show()
  45
  46     def background_grab(self,delayed):
  47         self._display()
  48
  49     def motion_notify(self, delayed, x, y):
  50         if not delayed:
  51             self.x = x
  52             self.y = y
  53             self._display()
  54
  55     def _display(self):
  56         """
  57         The  drawing method. Please remember this nomenclature:
  58
  59           image 0: foreground image, left untouched here
  60           image 1: original background, automatically kept up to date
  61                    by adesklets - hence we keep ourselves from modify it.
  62           image 2: Our displayed background - set My_Events::ready() for
  63                    initialisation details
  64           image 3: transient image on which we operate the
  65                    current transformation, before updating image 2
  66                    and destroying it.
  67         """
  68         adesklets.context_set_image(1)
  69         adesklets.context_set_image(adesklets.clone_image())
  70         adesklets.apply_filter("bump_map_point(x=%d,y=%d);" % (self.x, self.y))
  71         adesklets.context_set_image(2)
  72         adesklets.blend_image_onto_image(3,0,0,0,200,200,0,0,200,200)
  73         adesklets.free_image(3)
  74
  75 My_Events().pause()