Returns the baseline that has currently been allocated to @widget. This function is intended to be used when implementing handlers for the #GtkWidget::draw function, and when allocating child widgets in #GtkWidget::size_allocate.
the baseline of the @widget, or -1 if none
3.10
See Implementation
Returns the baseline that has currently been allocated to @widget. This function is intended to be used when implementing handlers for the #GtkWidget::draw function, and when allocating child widgets in #GtkWidget::size_allocate.