apps.carUi.car_ui_frontend.CarUiFrontend Class Reference

Render the Car UI shell and delegate application wiring. More...

Inheritance diagram for apps.carUi.car_ui_frontend.CarUiFrontend:

Public Member Functions
bool	initialize (self)
	Start composed services and make the frontend ready to run.
None	run (self)
	Run the Tk event loop until shutdown.
None	shutdown (self)
	Perform idempotent frontend shutdown.
None	close (self)
	Stop composed services and destroy the Tk application.
None	handle_ui_action (self, UiAction action)
	Route a semantic action through the application composition.
str	empty_value (self)
	Return the theme placeholder for unavailable compact values.
None	dispatch_ui (self, Callable[[], None] callback)
	Queue work for execution by the Tk event-loop thread.
tk.Misc	screen_parent (self)
	Return the container for navigable screen content.
None	activate_screen (self, ScreenUiIf screen)
	Make a screen the active semantic action target.
None	clear_screen_content (self)
	Destroy widgets belonging to the previous destination.
ScreenId|None	active_screen_id (self)
	Return the current route identifier, or None on the main menu.
None	show_screen (self, ScreenId screen_id)
	Navigate to a registered screen while recording history.
bool	go_back (self)
	Navigate to the previous route.
None	go_home (self)
	Clear navigation history and display the main menu.

Protected Member Functions
None	_apply_app_icon (self)
	Apply the OpenRoadCode logo to the Tk window and desktop shell.
None	_drain_ui_queue (self)
	Execute queued worker callbacks exclusively on the Tk main thread.

Detailed Description

Render the Car UI shell and delegate application wiring.

Member Function Documentation

activate_screen()

None apps.carUi.car_ui_frontend.CarUiFrontend.activate_screen	(		self,
		ScreenUiIf	screen
	)

Make a screen the active semantic action target.

Parameters

screen

Screen to activate.

dispatch_ui()

None apps.carUi.car_ui_frontend.CarUiFrontend.dispatch_ui	(		self,
		Callable[[], None]	callback
	)

Queue work for execution by the Tk event-loop thread.

This method may be called from worker threads. It intentionally performs no Tk/Tcl calls; the main thread drains the Python queue on a short timer.

Parameters

callback

Work to invoke on the Tk thread.

empty_value()

str apps.carUi.car_ui_frontend.CarUiFrontend.empty_value

(

self

)

Return the theme placeholder for unavailable compact values.

Returns

Configured placeholder text.

handle_ui_action()

None apps.carUi.car_ui_frontend.CarUiFrontend.handle_ui_action	(		self,
		UiAction	action
	)

Route a semantic action through the application composition.

Parameters

action

Toolkit-independent UI action to route.

Reimplemented from ui.ui_event_handler_if.UiEventHandlerIf.

initialize()

bool apps.carUi.car_ui_frontend.CarUiFrontend.initialize

(

self

)

Start composed services and make the frontend ready to run.

Returns

True unless the frontend has already been closed.

Reimplemented from ui.ui_if.UiIf.

screen_parent()

tk.Misc apps.carUi.car_ui_frontend.CarUiFrontend.screen_parent

(

self

)

Return the container for navigable screen content.

Returns

Tk content frame owned by the application shell.

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The documentation for this class was generated from the following file:

• apps/carUi/car_ui_frontend.py