OcempGUI FAQ

   1 import sys, random, pygame
   2 from ocempgui.widgets import Button, Renderer, Constants
   3 # Used to see some action happending in the GUI.
   4 amount = 0
   5 def _count_clicks (b):
   6     global amount
   7     amount += 1
   8     b.text = "Clicked %d times" % amount
   9 # Initialize pygame window
  10 pygame.init ()
  11 screen = pygame.display.set_mode ((200, 200))
  12 screen.fill ((255, 200, 100))
  13 # Create the Renderer to use for the UI elements.
  14 re = Renderer ()
  15 # Bind it to a part of the screen, which it will use to draw the widgets.
  16 # Here we use the complete screen.
  17 re.screen = screen
  18 # Create a button, place it at x=10, y=30, bind a callback to its
  19 # clicking action and add it to the Renderer instance.
  20 button = Button ("Simple Button")
  21 button.topleft = 10, 30
  22 button.connect_signal (Constants.SIG_CLICKED, _count_clicks, button)
  23 re.add_widget (button)
  24 # Some variables we will need in the main loop for drawing a rect.
  25 rnd = None
  26 color = None
  27 cnt = 100
  28 while True:
  29     events = pygame.event.get ()
  30     for ev in events:
  31         if ev.type == pygame.QUIT:
  32             sys.exit ()
  33         # We could handle other events separately, too, but do not care.
  34     # Draw the rectangle on the screen.
  35     cnt -= 1
  36     if cnt == 0:
  37         rnd = (random.randint (0, 5), random.randint (0, 5), random.randint (0, 5))
  38         color = (rnd[0] * 340) % 255,  (rnd[1] * 122) % 255, (rnd[2] * 278) % 255
  39         pygame.draw.rect (screen, color, (60, 50, 50, 50))
  40         cnt = 100
  41     # Pass all received events to the Renderer. We also could pass only
  42     # a subset of them, but want it to get all.
  43     re.distribute_events (*events)
  44     # Force a refresh of the UI elements as our main screen changed and
  45     # we want them to be placed upon the changes (look at the
  46     # intersection with the rectangle).
  47     re.refresh ()
  48     # We do not need to flip as it is done in the refresh() method of
  49     # the Renderer. If we assign just a part of the screen to the
  50     # Renderer, we would have to, of course.
  51     # pygame.display.flip ()
  52     # Do not use 100% CPU.
  53     pygame.time.delay (15)