private fun accept_event(event: InputEvent): Bool
	do
		if not visible then return false

		var display = app.display
		if display == null then return false

		if event isa PointerEvent then
			var ui_pos = app.ui_camera.camera_to_ui(event.x, event.y)

			for control in controls do
				if control.accept_event(event, ui_pos) then
					var prev_control = control_under_pointer.get_or_null(event.pointer_id)
					if prev_control != null and prev_control != control then
						prev_control.depressed_down
					end
					control_under_pointer[event.pointer_id] = control
					return true
				end
			end

			var prev_control = control_under_pointer.get_or_null(event.pointer_id)
			if prev_control != null then prev_control.depressed_down
			control_under_pointer.keys.remove event.pointer_id
		end

		return false
	end