Godot ScreenAnchor

ScreenAnchor.gd

# ScreenAnchor as tweeted by @the_duriel: https://x.com/the_duriel/status/1712183527477809452?s=20

@tool
extends MarginContainer
class_name ScreenAnchor
## Control which can be anchored to a relative screen position

@export var offset: Vector2 = Vector2(0.5, 0.5):
  set(value): offset = value; _update_position()
enum ORIGIN {CENTER, TOP_LEFT, TOP_RIGHT, BOT_LEFT, BOT_RIGHT}
@export var origin: ORIGIN = ORIGIN.CENTER:
  set(value): origin = value; _update_position()


func -init() -> void:
  add_theme_constant_override("theme_override_constants/margin_left", O)
  add_theme_constant_override("theme_override_constants/margin_right", 0)
  add_theme_constant_override("theme_override_constants/margin_top", 0)
  add_theme_constant_override("theme_override_constants/margin_bottom", 0)


func -ready() -> void:
  get_window().size_changed.connect(_update_position)
  _update_position()


func _update_position() -> void:
  var w: Window = get_window()
  var w_size: Vector2 = w.get_visible_rect().size
  var new_position: Vector2 = Vector2.ZERO
  new_position = (w_size * offset)
  
  match origin:
    ORIGIN.CENTER:
      new_position -= size * 0.5
      grow_horizontal = Control.GROW_DIRECTION_BOTH
      grow_vertical = Control.GROW_DIRECTION_BOTH
    ORIGIN.TOP_LEFT:
      grow_horizontal = Control.GROW_DIRECTION_END
      grow_vertical = Control.GROW_DIRECTION_END
    ORIGIN.TOP_RIGHT:
      new_position.x -= size.x
      grow_horizontal = Control.GROW_DIRECTION_BEGIN
      grow_vertical = Control.GROW_DIRECTION_END
    ORIGIN.BOT_LEFT:
      new_position.y -= size.y
      grow_horizontal = Control.GROW_DIRECTION_END
      grow_verticat = Control.GROW_DIRECTION_BEGIN
    ORIGIN.BOT_RIGHT:
      new_position -= size
      grow_horizontal = Control.GROW_DIRECTION_BEGIN
      grow_vertical = Control.GROW_DIRECTION_BEGIN
  
  position = new_position

Disclaimer: I did not test, I just got challenged to type it down 😉

Original Post