def hovered_element(self, new_hover: UIElement):
if self._hovered_element is not None:
self._hovered_element.on_unhover()
self._hovered_element = None
if new_hover is not None:
new_hover.on_hover()
self._hovered_element = new_hover
def focused_element(self, new_focus: UIElement):
if self._focused_element is not None:
self._focused_element.on_unfocus()
self._focused_element = None
if new_focus is not None:
new_focus.on_focus()
self._focused_element = new_focus
def update(self, element: UIElement, space=0, **kwargs):
cx, cy = self.cursor
if self._vertical:
# add offset
cy -= space
# position element
element.center_x = cx
element.center_y = cy - space - element.height // 2
# update cursor
self.cursor = cx, cy - space - element.height
else:
# add offset
cx += space
# position element
element.center_x = cx + space + element.width // 2
element.center_y = cy
# update cursor
self.cursor = cx + space + element.width, cy
def add_ui_element(self, ui_element: UIElement):
"""
Adds a :py:class:`arcade.gui.UIElement` to the :py:class:`arcade.gui.UIManager`.
:py:attr:`arcade.gui.UIElement.id` has to be unique.
The :py:class:`arcade.gui.UIElement` will be drawn by the :py:class:`arcade.gui.UIManager`.
:param UIElement ui_element: element to add.
"""
if not hasattr(ui_element, 'id'):
raise UIException('UIElement seems not to be properly setup, please check if you'
' overwrite the constructor and forgot "super().__init__(**kwargs)"')
ui_element.render()
self._ui_elements.append(ui_element)
ui_element.mng = self
# Add elements with id to lookup
if ui_element.id is not None:
if ui_element.id in self._id_cache:
raise UIException(f'duplicate id "{ui_element.id}"')
self._id_cache[ui_element.id] = ui_element
def add_ui_element(self, ui_element: UIElement):
if not hasattr(ui_element, 'id'):
raise UIException(
'UIElement seems not to be properly setup, please check if you'
' overwrite the constructor and forgot "super().__init__(**kwargs)"'
)
self._ui_elements.append(ui_element)
ui_element.mng = self
# Add elements with id to lookup
if ui_element.id is not None:
if ui_element.id in self._id_cache:
raise UIException(f'duplicate id "{ui_element.id}"')
self._id_cache[ui_element.id] = ui_element