def build(self):
"""Initializes the user interface and starts timed events."""
#TODO: Reorganize and consolidate; make necessary helper functions
self.title = 'Open Lighting Architecture'
self.ui_queue = Queue()
self.layout = BoxLayout(orientation='vertical')
self.selected_universe_service = UniverseSelectedService()
self.ola_listener = OLAListener(self.ui_queue,
self.create_select_server,
self.create_ola_client,
self.start_ola,
self.stop_ola)
#Screen creation and layout placing
self.screen_tabs = ScreenTabs()
self.monitor_screen = MonitorScreen(self.ola_listener,
self.selected_universe_service,
name='DMX Monitor')
self.console_screen = ConsoleScreen(self.ola_listener,
self.selected_universe_service,
name='DMX Console')
self.devsets = MainScreen(self.ola_listener,
self.selected_universe_service,
name='Device Settings')
self.screen_tabs.ids.monitor_screen.add_widget(self.monitor_screen)
self.screen_tabs.ids.console_screen.add_widget(self.console_screen)
self.screen_tabs.ids.settings_screen.add_widget(self.devsets)
self.layout.add_widget(self.screen_tabs)
Clock.schedule_interval(lambda dt: self.display_tasks(),
self.EVENT_POLL_INTERVAL)
Clock.schedule_interval(self._update_clock, 1 / 60.)
return self.layout
class RPiUI(App):
"""Class for drawing and handling the Kivy application itself."""
EVENT_POLL_INTERVAL = 1 / 20
UNIVERSE_POLL_INTERVAL = 1 / 10
index = NumericProperty(-1)
time = NumericProperty(0)
current_title = StringProperty()
screen_names = ListProperty([])
def build(self):
"""Initializes the user interface and starts timed events."""
#TODO: Reorganize and consolidate; make necessary helper functions
self.title = 'Open Lighting Architecture'
self.ui_queue = Queue()
self.layout = BoxLayout(orientation='vertical')
self.selected_universe_service = UniverseSelectedService()
self.ola_listener = OLAListener(self.ui_queue,
self.create_select_server,
self.create_ola_client,
self.start_ola,
self.stop_ola)
#Screen creation and layout placing
self.screen_tabs = ScreenTabs()
self.monitor_screen = MonitorScreen(self.ola_listener,
self.selected_universe_service,
name='DMX Monitor')
self.console_screen = ConsoleScreen(self.ola_listener,
self.selected_universe_service,
name='DMX Console')
self.devsets = MainScreen(self.ola_listener,
self.selected_universe_service,
name='Device Settings')
self.screen_tabs.ids.monitor_screen.add_widget(self.monitor_screen)
self.screen_tabs.ids.console_screen.add_widget(self.console_screen)
self.screen_tabs.ids.settings_screen.add_widget(self.devsets)
self.layout.add_widget(self.screen_tabs)
Clock.schedule_interval(lambda dt: self.display_tasks(),
self.EVENT_POLL_INTERVAL)
Clock.schedule_interval(self._update_clock, 1 / 60.)
return self.layout
def on_start(self):
"""Executed after build()"""
signal(SIGINT, self.stop) #Captures ctrl-c to exit correctly
self.ola_listener.start()
def on_stop(self):
"""Executed when the application quits"""
self.ola_listener.stop()
def on_pause(self):
"""Pausing is not allowed; the application will close instead"""
return False
def on_resume(self):
"""Because pausing is not allowed, nothing to do here"""
pass
@staticmethod
def create_select_server():
return SelectServer()
@staticmethod
def create_ola_client():
return OlaClient()
def start_ola(self):
"""Executed when OLAD starts, enables proper UI actions"""
self.devsets.start_ola(self.UNIVERSE_POLL_INTERVAL)
def stop_ola(self):
"""Executed when OLAD stops, disables proper UI actions"""
self.devsets.stop_ola()
def display_tasks(self):
"""Polls for events that need to update the UI,
then updates the UI accordingly.
"""
try:
event = self.ui_queue.get(False)
event.run()
except Empty:
pass
def _update_clock(self, dt):
self.time = time()
def olad_listen(self, dt):
self.ola_listener.listen(self)
