ReadonlytooltipReadonlytooltipProtectedtopThe top-most container in the current UI tree
Add a layer for the TooltipController#tooltipContainer. If there is a layer and adding another one would succeed, remove the old one.
True if the layer was addedd successfully, or false if there was no top layered container.
ProtecteddoImplementation for BaseTooltipController#updateTooltipRect. Must be implemented by base class. BaseTooltipController#topLayeredContainer is guaranteed to be set when this method is called.
Find the top-most layered container that is an ascendant of the BaseTooltipController#tooltipWrapper. You must call this when the wrapper widget is attached to a parent.
Removes the current layer if there is any, and if the top-most layered container changed.
Remove the layer of the TooltipController#tooltipContainer if there is any.
Update the TooltipContainer#tooltipRect of the TooltipController#tooltipContainer.
The default implementation of BaseTooltipController. Used by TooltipContainer, which lets you provide an anchor point to position the tooltip around.