Source Code for Module _Framework.ButtonElement

 1  #Embedded file name: /Users/versonator/Hudson/live/Projects/AppLive/Resources/MIDI Remote Scripts/_Framework/ButtonElement.py 
 2  import Live 
 3  from InputControlElement import InputControlElement, MIDI_CC_TYPE 
 4  ON_VALUE = int(127) 
 5  OFF_VALUE = int(0) 
 6   
 7 -class DummyUndoStepHandler(object): 
 8   
 9 -    def begin_undo_step(self): 
10          pass 
11   
12 -    def end_undo_step(self): 
13          pass 
14   
15   
16 -class ButtonElementMixin(object): 
17      """ 
18      Mixin for sending values to button-like control-elements elements. 
19      """ 
20   
21 -    def set_light(self, is_turned_on): 
22          if is_turned_on: 
23              self.turn_on() 
24          else: 
25              self.turn_off() 
26   
27 -    def turn_on(self): 
28          self.send_value(ON_VALUE) 
29   
30 -    def turn_off(self): 
31          self.send_value(OFF_VALUE) 
32   
33   
34 -class ButtonElement(InputControlElement, ButtonElementMixin): 
35      """ 
36      Class representing a button a the controller 
37      """ 
38   
39 -    def __init__(self, is_momentary, msg_type, channel, identifier, undo_step_handler = DummyUndoStepHandler(), *a, **k): 
40          super(ButtonElement, self).__init__(msg_type, channel, identifier, *a, **k) 
41          self.__is_momentary = bool(is_momentary) 
42          self._last_received_value = -1 
43          self._undo_step_handler = undo_step_handler 
44   
45 -    def is_momentary(self): 
46          """ returns true if the buttons sends a message on being released """ 
47          return self.__is_momentary 
48   
49 -    def message_map_mode(self): 
50          raise self.message_type() is MIDI_CC_TYPE or AssertionError 
51          return Live.MidiMap.MapMode.absolute 
52   
53 -    def is_pressed(self): 
54          return self.__is_momentary and self._last_received_value > 0 
55   
56 -    def receive_value(self, value): 
57          pressed_before = self.is_pressed() 
58          self._last_received_value = value 
59          if not pressed_before and self.is_pressed(): 
60              self._undo_step_handler.begin_undo_step() 
61          super(ButtonElement, self).receive_value(value) 
62          if pressed_before and not self.is_pressed(): 
63              self._undo_step_handler.end_undo_step() 
64