test/fading.py

   1 """
   2 fading.py - S.Fourmanoit <syfou@users.sourceforge.net>, 2005
   3
   4 adesklets test script for indirect mode, introduced in adesklets 0.2.0:
   5
   6 - It creates a transpaent window of the same size than supplied image
   7   ('image/frog.png'; you do not like it? Maybe, but it's mine)
   8 - It then draws the image on in
   9 - It checks for the cursor entering and leaving its window visible parts,
  10   firing a half second fade-out effect (ten frames) on leaving,
  11   interrupting it as needed by new cursor change of position
  12
  13 To try it:
  14         - Install adesklets with both python support enabled (default)
  15           and GNU history support (default)
  16         - Run python fading.py from this directory
  17 """
  18 import adesklets
  19
  20 class My_Events(adesklets.Events_handler):
  21     witdh  = 1
  22     height = 1
  23     fade   = ()
  24     image  = 'images/frog.png'
  25
  26     def __init__(self):
  27         adesklets.Events_handler.__init__(self)
  28
  29     def __del__(self):
  30         adesklets.Events_handler.__del__(self)
  31
  32     def ready(self):
  33         # Load the image, set the window accordingly
  34         #
  35         adesklets.context_set_image(adesklets.load_image(self.image))
  36         self.width=adesklets.image_get_width();
  37         self.height=adesklets.image_get_height();
  38         adesklets.window_resize(self.width,self.height)
  39
  40         # Let's create our ten step fading tool: a plain color modifier
  41         #
  42         adesklets.context_set_color_modifier(adesklets.create_color_modifier())
  43         adesklets.set_color_modifier_tables(
  44             range(0,256)*3 + [max(0,val-26) for val in range(0,256)])
  45
  46         # Now, let's toggle the interpreter mode,
  47         # and record the complete fading sequence
  48         #
  49         adesklets.start_recording()
  50         for i in range(1,11):
  51             adesklets.context_set_image(3)
  52             adesklets.apply_color_modifier()
  53             adesklets.context_set_image(0)
  54             adesklets.blend_image_onto_image(3,1,
  55                                              0,0,self.width,self.height,
  56                                              0,0,self.width,self.height)
  57             adesklets.time_gate(i*.05)
  58         self.fade = adesklets.stop_recording()
  59
  60         # Let's finish seting up the window
  61         #
  62         adesklets.context_set_blend(False)
  63         self._display()
  64         adesklets.play_set_abort_on_events(True)  # <== Note this !
  65         adesklets.window_set_transparency(True);
  66         adesklets.window_show()
  67
  68     def leave_notify(self,delayed,x,y):
  69         # Fade-out event handler...
  70         #
  71         if not delayed:
  72             print 'Fading out...',
  73             adesklets.context_set_image(2)
  74             adesklets.clone_image()
  75             if adesklets.play(*self.fade) is None:
  76                 print 'ended.'
  77             else:
  78                 print 'interrupted.'
  79             adesklets.free_image(3)
  80
  81     def menu_fire(self,delayed,id,str):
  82         # This will get generated first whenever
  83         # the user moves the window, so the LeaveNotify
  84         # afterwards will get delayed, thus go unseen.
  85         pass
  86
  87     def enter_notify(self,delayed,x,y):
  88         # ...that can be aborted (not interrupted!) by this one.
  89         #
  90         self._display()
  91
  92     def _display(self):
  93         # Reset the window to the original image
  94         #
  95         adesklets.context_set_image(0)
  96         adesklets.blend_image_onto_image(2,1,
  97                                          0,0,self.width,self.height,
  98                                          0,0,self.width,self.height)
  99 My_Events().pause()