music_sampler/key.py

   1 from kivy.uix.widget import Widget
   2 from kivy.properties import AliasProperty, BooleanProperty, \
   3                             ListProperty, StringProperty
   4 from kivy.uix.behaviors import ButtonBehavior
   5
   6 from .action import Action
   7 from .helpers import debug_print
   8 import time
   9 import threading
  10 from transitions.extensions import HierarchicalMachine as Machine
  11
  12 class Key(ButtonBehavior, Widget):
  13     STATES = [
  14         'initial',
  15         'configuring',
  16         'configured',
  17         'loading',
  18         'failed',
  19         {
  20             'name': 'loaded',
  21             'children': [
  22                 'no_config',
  23                 'no_actions',
  24                 'running',
  25                 'protecting_repeat'
  26             ]
  27         }
  28     ]
  29
  30     TRANSITIONS = [
  31         {
  32             'trigger': 'configure',
  33             'source': 'initial',
  34             'dest': 'configuring'
  35         },
  36         {
  37             'trigger': 'fail',
  38             'source': 'configuring',
  39             'dest': 'failed',
  40             'after': 'key_loaded_callback'
  41         },
  42         {
  43             'trigger': 'success',
  44             'source': 'configuring',
  45             'dest': 'configured',
  46             'after': 'load'
  47         },
  48         {
  49             'trigger': 'no_config',
  50             'source': 'configuring',
  51             'dest': 'loaded_no_config',
  52             'after': 'key_loaded_callback'
  53         },
  54         {
  55             'trigger': 'load',
  56             'source': 'configured',
  57             'dest': 'loading'
  58         },
  59         {
  60             'trigger': 'fail',
  61             'source': 'loading',
  62             'dest': 'failed',
  63             'after': 'key_loaded_callback'
  64         },
  65         {
  66             'trigger': 'success',
  67             'source': 'loading',
  68             'dest': 'loaded',
  69             'after': 'key_loaded_callback'
  70         },
  71         {
  72             'trigger': 'no_actions',
  73             'source': 'loading',
  74             'dest': 'loaded_no_actions',
  75             'after': 'key_loaded_callback'
  76         },
  77         {
  78             'trigger': 'reload',
  79             'source': ['loaded','failed'],
  80             'dest': 'configuring',
  81             'after': 'key_loaded_callback'
  82         },
  83         {
  84             'trigger': 'run',
  85             'source': 'loaded',
  86             'dest': 'loaded_running',
  87             'after': ['run_actions', 'finish'],
  88             # if a child, like loaded_no_actions, has no transitions, then it
  89             # is bubbled to the parent, and we don't want that.
  90             'conditions': ['is_loaded']
  91         },
  92         {
  93             'trigger': 'finish',
  94             'source': 'loaded_running',
  95             'dest': 'loaded_protecting_repeat'
  96         },
  97         {
  98             'trigger': 'repeat_protection_finished',
  99             'source': 'loaded_protecting_repeat',
 100             'dest': 'loaded'
 101         },
 102     ]
 103
 104     key_sym = StringProperty(None)
 105     custom_color = ListProperty([0, 1, 0])
 106     description_title = StringProperty("")
 107     description = ListProperty([])
 108     state = StringProperty("")
 109
 110     def get_alias_line_cross_color(self):
 111         if not self.is_failed() and (
 112                 not self.is_loaded(allow_substates=True)\
 113                 or self.is_loaded_running()\
 114                 or self.is_loaded_protecting_repeat()):
 115             return [120/255, 120/255, 120/255, 1]
 116         else:
 117             return [0, 0, 0, 0]
 118
 119     def set_alias_line_cross_color(self):
 120         pass
 121
 122     line_cross_color = AliasProperty(
 123             get_alias_line_cross_color,
 124             set_alias_line_cross_color,
 125             bind=['state'])
 126
 127     def get_alias_line_color(self):
 128         if self.is_loaded_running():
 129             return [0, 0, 0, 1]
 130         else:
 131             return [120/255, 120/255, 120/255, 1]
 132
 133     def set_alias_line_color(self):
 134         pass
 135
 136     line_color = AliasProperty(get_alias_line_color, set_alias_line_color,
 137             bind=['state'])
 138
 139     def get_alias_color(self):
 140         if self.is_loaded_inactive():
 141             return [1, 1, 1, 1]
 142         elif self.is_loaded_protecting_repeat():
 143             return [*self.custom_color, 100/255]
 144         elif self.is_loaded_running():
 145             return [*self.custom_color, 100/255]
 146         elif self.is_loaded(allow_substates=True):
 147             return [*self.custom_color, 1]
 148         elif self.is_failed():
 149             return [0, 0, 0, 1]
 150         else:
 151             return [*self.custom_color, 100/255]
 152     def set_alias_color(self):
 153         pass
 154
 155     color = AliasProperty(get_alias_color, set_alias_color,
 156             bind=['state', 'custom_color'])
 157
 158     def __init__(self, **kwargs):
 159         self.actions = []
 160         self.current_action = None
 161
 162         Machine(model=self, states=self.STATES,
 163                 transitions=self.TRANSITIONS, initial='initial',
 164                 ignore_invalid_triggers=True, queued=True)
 165         super(Key, self).__init__(**kwargs)
 166
 167     # Kivy events
 168     def on_key_sym(self, key, key_sym):
 169         if key_sym != "":
 170             self.configure()
 171
 172     def on_press(self):
 173         self.list_actions()
 174
 175     # Machine states / events
 176     def is_loaded_or_failed(self):
 177         return self.is_loaded(allow_substates=True) or self.is_failed()
 178
 179     def is_loaded_inactive(self):
 180         return self.is_loaded_no_config() or self.is_loaded_no_actions()
 181
 182     def on_enter_configuring(self):
 183         if self.key_sym in self.parent.key_config:
 184             self.config = self.parent.key_config[self.key_sym]
 185
 186             self.actions = []
 187             for key_action in self.config['actions']:
 188                 self.add_action(key_action[0], **key_action[1])
 189
 190             if 'description' in self.config['properties']:
 191                 self.set_description(self.config['properties']['description'])
 192             if 'color' in self.config['properties']:
 193                 self.set_color(self.config['properties']['color'])
 194             self.success()
 195         else:
 196             self.no_config()
 197
 198     def on_enter_loading(self):
 199         if len(self.actions) > 0:
 200             for action in self.actions:
 201                 action.load()
 202         else:
 203             self.no_actions()
 204
 205     def run_actions(self, modifiers):
 206         self.parent.parent.ids['KeyList'].append(self.key_sym)
 207         debug_print("running actions for {}".format(self.key_sym))
 208         start_time = time.time()
 209         self.parent.start_running(self, start_time)
 210         for self.current_action in self.actions:
 211             if self.parent.keep_running(self, start_time):
 212                 self.list_actions()
 213                 self.current_action.run(start_time)
 214         self.list_actions(last_action_finished=True)
 215
 216         self.parent.finished_running(self, start_time)
 217
 218     def on_enter_loaded_protecting_repeat(self, modifiers):
 219         if 'repeat_delay' in self.config['properties']:
 220             self.protecting_repeat_timer = threading.Timer(
 221                     self.config['properties']['repeat_delay'],
 222                     self.repeat_protection_finished)
 223             self.protecting_repeat_timer.start()
 224         else:
 225             self.repeat_protection_finished()
 226
 227     # This one cannot be in the Machine state since it would be queued to run
 228     # *after* the loop is ended...
 229     def interrupt(self):
 230         self.current_action.interrupt()
 231
 232     # Callbacks
 233     def key_loaded_callback(self):
 234         self.parent.key_loaded_callback()
 235
 236     def callback_action_ready(self, action, success):
 237         if not success:
 238             self.fail()
 239         elif all(action.is_loaded_or_failed() for action in self.actions):
 240             self.success()
 241
 242     # Setters
 243     def set_description(self, description):
 244         if description[0] is not None:
 245             self.description_title = str(description[0])
 246         self.description = []
 247         for desc in description[1 :]:
 248             if desc is None:
 249                 self.description.append("")
 250             else:
 251                 self.description.append(str(desc).replace(" ", " "))
 252
 253     def set_color(self, color):
 254         color = [x / 255 for x in color]
 255         self.custom_color = color
 256
 257     # Actions handling
 258     def add_action(self, action_name, **arguments):
 259         self.actions.append(Action(action_name, self, **arguments))
 260
 261     def list_actions(self, last_action_finished=False):
 262         not_running = (not self.is_loaded_running())
 263         current_action_seen = False
 264         action_descriptions = []
 265         for action in self.actions:
 266             if not_running:
 267                 state = "inactive"
 268             elif last_action_finished:
 269                 state = "done"
 270             elif current_action_seen:
 271                 state = "pending"
 272             elif action == self.current_action:
 273                 current_action_seen = True
 274                 state = "current"
 275             else:
 276                 state = "done"
 277             action_descriptions.append([action.description(), state])
 278         self.parent.parent.ids['ActionList'].update_list(
 279                 self,
 280                 action_descriptions)