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"""A gamepad.
This module contains a class implementing a pygame gamepad.
"""
__author__ = 'Florian Krause <florian@expyriment.org>, \
Oliver Lindemann <oliver@expyriment.org>'
__version__ = '0.7.0'
__revision__ = '55a4e7e'
__date__ = 'Wed Mar 26 14:33:37 2014 +0100'
import pygame
import time
import expyriment
from expyriment.misc._timer import get_time
from _keyboard import Keyboard
from _input_output import Input, Output
pygame.joystick.init()
class GamePad(Input, Output):
"""A class for creating gamepad/joystick input."""
@staticmethod
def get_gampad_count():
"""Get the number of gamepads/joysticks connected to the system."""
return pygame.joystick.get_count()
def __init__(self, gamepad_id, track_button_events=True,
track_motion_events=False):
"""Create a gamepad/joystick input.
Parameters
----------
gamepad_id : int
id of the gamepad
track_button_events : bool, optional
Track button events (default=True)
track_motion_events : bool, optional
Track motion events (default=False)
"""
if not expyriment._active_exp.is_initialized:
raise RuntimeError(
"Cannot create GamePad before expyriment.initialize()!")
Input.__init__(self)
Output.__init__(self)
self.track_button_events = track_button_events
self.track_motion_events = track_motion_events
self._joystick = pygame.joystick.Joystick(gamepad_id)
self._joystick.init()
@property
def track_button_events(self):
"""Getter for track_button_events."""
return self._track_button_events
@track_button_events.setter
def track_button_events(self, value):
"""Setter for track_button_events.
Switch on/off the processing of button events.
"""
self._track_button_events = value
if value:
pygame.event.set_allowed(pygame.JOYBUTTONDOWN)
pygame.event.set_allowed(pygame.JOYBUTTONUP)
else:
pygame.event.set_blocked(pygame.JOYBUTTONDOWN)
pygame.event.set_blocked(pygame.JOYBUTTONUP)
@property
def track_motion_events(self):
"""Getter for track_motion_events."""
return self._track_motion_events
@track_motion_events.setter
def track_motion_events(self, value):
"""Setter for track_motion_events.
Switch on/off the processing of motion events.
"""
self._track_motion_events = value
if value:
pygame.event.set_allowed(pygame.JOYAXISMOTION)
pygame.event.set_allowed(pygame.JOYBALLMOTION)
pygame.event.set_allowed(pygame.JOYHATMOTION)
else:
pygame.event.set_blocked(pygame.JOYAXISMOTION)
pygame.event.set_blocked(pygame.JOYBALLMOTION)
pygame.event.set_blocked(pygame.JOYHATMOTION)
@property
def id(self):
"""Getter for id."""
return self._joystick.get_id()
@property
def name(self):
"""Getter for name."""
return self._joystick.get_name()
@property
def joystick(self):
"""Getter for joystick."""
return self._joystick
def get_numaxes(self):
"""Get the number of axes."""
return self._joystick.get_numaxes()
def get_axis(self, axis):
"""Get current axis state.
Parameters
----------
axis : int
axis to get the current state from
"""
pygame.event.pump()
return self._joystick.get_axis(axis)
def get_numballs(self):
"""Get the number of balls."""
return self._joystick.get_numballs()
def get_ball(self, ball):
"""Get current ball state.
Parameters
----------
ball : int
ball to get the current state from
"""
pygame.event.pump()
return self._joystick.get_ball(ball)
def get_numbuttons(self):
"""Get the number of buttons."""
return self._joystick.get_numbuttons()
def get_button(self, button):
"""Get current button state.
Parameters
----------
button : int
button to get the current state from
"""
pygame.event.pump()
return self._joystick.get_button(button)
def get_numhats(self):
"""Get the number of hats."""
return self._joystick.get_numhats()
def get_hat(self, hat):
"""Get current hat state.
Parameters
----------
hat : int
hat to get the current state from
"""
pygame.event.pump()
return self._joystick.get_hat(hat)
def clear(self):
"""Clear gamepad events from cue."""
pygame.event.clear(pygame.JOYBUTTONDOWN)
pygame.event.clear(pygame.JOYBUTTONUP)
pygame.event.clear(pygame.JOYAXISMOTION)
pygame.event.clear(pygame.JOYBALLMOTION)
pygame.event.clear(pygame.JOYHATMOTION)
if self._logging:
expyriment._active_exp._event_file_log("GamePad,cleared", 2)
def wait_press(self, buttons=None, duration=None):
"""Wait for gamepad button press.
Returns the found button and the reaction time.
Parameters
----------
buttons : int or list, optional
specific buttons to wait for
duration : int, optional
maximal time to wait in ms
Returns
-------
button : int
button _id of the pressed button
rt : int
reaction time in ms
"""
start = get_time()
rt = None
_button = None
self.clear()
if buttons is None:
buttons = range(self.get_numbuttons())
if type(buttons) is not list:
buttons = [buttons]
done = False
while not done:
expyriment._active_exp._execute_wait_callback()
for button in buttons:
if self.get_button(button):
_button = button
rt = int((get_time() - start) * 1000)
done = True
break
if _button is not None or Keyboard.process_control_keys():
done = True
break
if duration:
if int((get_time() - start) * 1000) >= duration:
done = True
break
time.sleep(0.0005)
if self._logging:
expyriment._active_exp._event_file_log(
"Gamepad,received,{0},wait_press".format(_button))
return _button, rt
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