Returns the baseline that has currently been allocated to @widget.
This function is intended to be used when implementing handlers for the GtkWidgetClass.snapshot() function, and when allocating child widgets in GtkWidgetClass.size_allocate().
the baseline of the @widget, or -1 if none
See Implementation
Returns the baseline that has currently been allocated to @widget.
This function is intended to be used when implementing handlers for the GtkWidgetClass.snapshot() function, and when allocating child widgets in GtkWidgetClass.size_allocate().