def _setup_mask(self):
mask = array(b'B', b'\xff' * 32)
if self._keys_to_ignore >= self.IGNORE_MODIFIER_KEYS:
modifier_mappings = xlib.get_modifier_mapping(self.display)
for modifier_keys in modifier_mappings:
for keycode in modifier_keys:
mask[keycode // 8] &= ~(1 << (keycode % 8))
return mask
def __init__(self, parent=None):
AbstractKeyboardMonitor.__init__(self, parent)
self.display = Display.from_qt()
# this timer is started on every keyboard event, its timeout signals,
# that the keyboard is to be considered inactive again
self._idle_timer = QTimer(self)
self._idle_timer.setInterval(self.DEFAULT_IDLETIME)
self._idle_timer.timeout.connect(self.typingStopped)
self._idle_timer.setSingleShot(True)
# this object records events
self._recorder = EventRecorder(self)
self._recorder.keyPressed.connect(self._key_pressed)
self._recorder.keyReleased.connect(self._key_released)
self._recorder.started.connect(self.started)
self._recorder.finished.connect(self.stopped)
# a set of all known modifier keycodes
modifier_mapping = xlib.get_modifier_mapping(self.display)
self._modifiers = frozenset(keycode for modifiers in modifier_mapping
for keycode in modifiers if keycode != 0)
# a set holding all pressed, but not yet released modifier keys
self._pressed_modifiers = set()
# the value of keys to ignore
self._keys_to_ignore = self.IGNORE_NO_KEYS
