Creates a canvas context menu with view-level and scene-level actions.
Constructor params placeholder.
Sets the active context for this menu.
Current canvas menu context.
Emits an event to current subscribers.
Event name.
Event payload.
Subscribes to a menu event.
Supported events currently include:
"shown""hidden"Event name.
Subscriber callback.
Context menu for interacting with the canvas or empty view area.
Includes only actions that apply to the view, scene, or model as a whole, and excludes actions that require a specific ViewObject.