def present_trial(imagepath):
"""
This is the main function used to run this demo. It is fed an imagepath and uses this to create a CommandableImageSprite offscreen. This Sprite is later moved onto the screen, where it hangs out until it is clicked.
"""
## Images here are commandable sprites, so we can tell them what to do using Q below
img = TobiiSprite( screen, spot.center, imagepath, tobii_controller, scale=IMAGE_SCALE)
img.enable_follow()
drum = DropSprite(screen, (609,407), kstimulus("common_objects/drum.png"), scale=IMAGE_SCALE)
img.register_drag_zone(drum)
images = [drum, img]
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Set up the updates, etc.
# A queue of animation operations
Q = DisplayQueue()
# What order do we draw sprites and things in?
dos = OrderedUpdates(images) # Draw and update in this order
start_time = time()
#start tracking
tobii_controller.start_tracking()
## The standard event loop in kelpy -- this loops infinitely to process interactions
## and throws events depending on what the user does
for event in kelpy_standard_event_loop(screen, Q, dos, throw_null_events=True):
# This also turns it off when the sprite it not looked at any longer.
img.process_follow(event) ## simple, right?
if was_dragged_into_zone(event): ## This is a function located in the EventHandler that watches for drag zone events.
print "Nice Drumming!"
play_sound(kstimulus("sounds/Button-Reverb.wav"))
if event.type == QUIT:
tobii_controller.close_data_file()
tobii_controller.destroy()
tobii_controller.stop_tracking()
