def test_change_layer(self, _init_pygame, default_ui_manager):
element = UIElement(relative_rect=pygame.Rect(0, 0, 50, 50),
manager=default_ui_manager,
container=None,
starting_height=0,
layer_thickness=1)
assert element.get_top_layer() == 1
element.change_layer(4)
assert element.get_top_layer() == 5
def add_element(self, element: UIElement):
"""
Add a UIElement to the container. The UI's relative_rect parameter will be relative to
this container.
:param element: A UIElement to add to this container.
"""
element.change_layer(self._layer + element.starting_height)
self.elements.append(element)
self.recalculate_container_layer_thickness()