Assigns the given @width, @height, and @baseline to a @widget, and computes the position and sizes of the children of the @widget using the layout management policy of @manager.
the GtkWidget using @manager
the new width of the @widget
the new height of the @widget
the baseline position of the @widget, or -1
See Implementation
Assigns the given @width, @height, and @baseline to a @widget, and computes the position and sizes of the children of the @widget using the layout management policy of @manager.