test-kivy-app/kivy_venv/share/kivy-examples/miscellaneous/joystick.py

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2024-09-15 12:12:16 +00:00
# Joystick / Gamepad example
# STOP_FIRE from https://wiki.libsdl.org/SDL_JoyAxisEvent
from kivy.app import App
from kivy.clock import Clock
from kivy.uix.widget import Widget
from kivy.core.window import Window
from kivy.properties import ObjectProperty, ListProperty
class Listener(Widget):
# fire / trigger axis
FIRE = (2, 5)
STOP_FIRE = -32767
# min value for user to actually trigger axis
OFFSET = 15000
# current values + event instance
VALUES = ListProperty([])
HOLD = ObjectProperty(None)
def __init__(self, **kwargs):
super(Listener, self).__init__(**kwargs)
# get joystick events first
Window.bind(on_joy_hat=self.on_joy_hat)
Window.bind(on_joy_ball=self.on_joy_ball)
Window.bind(on_joy_axis=self.on_joy_axis)
Window.bind(on_joy_button_up=self.on_joy_button_up)
Window.bind(on_joy_button_down=self.on_joy_button_down)
# show values in console
def print_values(self, *args):
print(self.VALUES)
def joy_motion(self, event, id, axis, value):
# HAT first, returns max values
if isinstance(value, tuple):
if not value[0] and not value[1]:
Clock.unschedule(self.HOLD)
else:
self.VALUES = [event, id, axis, value]
self.HOLD = Clock.schedule_interval(self.print_values, 0)
return
# unschedule if at zero or at minimum (FIRE)
if axis in self.FIRE and value < self.STOP_FIRE:
Clock.unschedule(self.HOLD)
return
elif abs(value) < self.OFFSET or self.HOLD:
Clock.unschedule(self.HOLD)
# schedule if over OFFSET (to prevent accidental event with low value)
if (axis in self.FIRE and value > self.STOP_FIRE or
axis not in self.FIRE and abs(value) >= self.OFFSET):
self.VALUES = [event, id, axis, value]
self.HOLD = Clock.schedule_interval(self.print_values, 0)
# replace window instance with identifier
def on_joy_axis(self, win, stickid, axisid, value):
self.joy_motion('axis', stickid, axisid, value)
def on_joy_ball(self, win, stickid, ballid, xvalue, yvalue):
self.joy_motion('ball', stickid, ballid, (xvalue, yvalue))
def on_joy_hat(self, win, stickid, hatid, value):
self.joy_motion('hat', stickid, hatid, value)
def on_joy_button_down(self, win, stickid, buttonid):
print('button_down', stickid, buttonid)
def on_joy_button_up(self, win, stickid, buttonid):
print('button_up', stickid, buttonid)
class JoystickApp(App):
def build(self):
return Listener()
if __name__ == '__main__':
JoystickApp().run()