Gabby Pelton
141 lines
4.6 KiB
Python
141 lines
4.6 KiB
Python
import time
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import threading
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class WhisplayInterface:
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def __init__(self, board=None, long_press_threshold=0.5, double_press_threshold=0.3):
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self._board = board
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self._long_press_threshold = long_press_threshold
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self._double_press_threshold = double_press_threshold
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self._button_is_double_pressed_set = False
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self._button_press_start = None
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self._button_press_end = None
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self._button_is_pressed = False
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self._button_was_pressed = False
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self._button_is_long_pressed = False
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self._button_was_long_pressed = False
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self._button_is_double_pressed = False
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self._button_was_double_pressed = False
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self._press_callbacks = []
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self._release_callbacks = []
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self._running = False
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self._gesture_thread = None
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if board is not None:
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self.attach(board)
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@property
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def long_press_threshold(self):
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return self._long_press_threshold
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@property
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def double_press_threshold(self):
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return self._double_press_threshold
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@property
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def is_pressed(self):
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return self._button_is_pressed
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@property
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def was_pressed(self):
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return self._button_was_pressed
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@property
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def is_long_pressed(self):
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return self._button_is_long_pressed
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@property
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def was_long_pressed(self):
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return self._button_was_long_pressed
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@property
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def is_double_pressed(self):
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return self._button_is_double_pressed
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@property
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def was_double_pressed(self):
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return self._button_was_double_pressed
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@property
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def press_duration(self):
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if self._button_press_start is None:
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return 0.0
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end = self._button_press_end if self._button_press_end is not None else time.time()
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return end - self._button_press_start
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def attach(self, board):
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self._board = board
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self._board.on_button_press(self._on_button_press)
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self._board.on_button_release(self._on_button_release)
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self.start()
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def start(self):
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if self._gesture_thread is not None:
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return
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self._running = True
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self._gesture_thread = threading.Thread(daemon=True, target=self._gesture_loop)
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self._gesture_thread.start()
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def stop(self):
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self._running = False
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def on_press(self, callback):
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self._press_callbacks.append(callback)
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def on_release(self, callback):
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self._release_callbacks.append(callback)
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def acknowledge_press(self):
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self._button_was_pressed = False
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def acknowledge_long_press(self):
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self._button_was_long_pressed = False
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def acknowledge_double_press(self):
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self._button_was_double_pressed = False
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def _on_button_press(self):
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self._button_is_pressed = True
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self._button_press_start = time.time()
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if self._button_press_end is not None:
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gap = self._button_press_start - self._button_press_end
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if gap < self._double_press_threshold:
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self._button_is_double_pressed = True
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self._button_is_double_pressed_set = True
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for cb in self._press_callbacks:
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cb()
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def _on_button_release(self):
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self._button_was_pressed = self._button_is_pressed
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self._button_press_end = time.time()
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self._button_was_long_pressed = self._button_is_long_pressed
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self._button_was_double_pressed = self._button_is_double_pressed
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self._button_is_pressed = False
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self._button_is_double_pressed = False
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self._button_is_long_pressed = False
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self._button_is_double_pressed_set = False
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for cb in self._release_callbacks:
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cb()
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def _gesture_loop(self):
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while self._running:
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try:
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current_time = time.time()
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if self._button_is_pressed:
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if not self._button_is_double_pressed_set:
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self._button_is_double_pressed = (
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self._button_was_pressed
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and self._button_press_end is not None
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and current_time - self._button_press_end < self._double_press_threshold
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)
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if self._button_is_double_pressed:
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self._button_is_double_pressed_set = True
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self._button_is_long_pressed = (
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current_time - self._button_press_start > self._long_press_threshold
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)
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except Exception:
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pass
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time.sleep(0.05)
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