Check if given point is within the widget.
Override this to disambiguate clicks and mouse-over between widgets that
would otherwise partially overlap.
x and y are given in local widget coordinates.
IMPORTANT: a widget CANNOT be clickable beyond its _position.
For now, there is no good reason for that, but it could be useful
in the future if we get acceleration structure for picking elements.
Check if given point is within the widget. Override this to disambiguate clicks and mouse-over between widgets that would otherwise partially overlap.
x and y are given in local widget coordinates. IMPORTANT: a widget CANNOT be clickable beyond its _position. For now, there is no good reason for that, but it could be useful in the future if we get acceleration structure for picking elements.