Gets the accumulative preferred width for @height for all rows which have been requested for the same said @height with this context.
After gtk_cell_area_context_reset() is called and/or before ever requesting the size of a #GtkCellArea, the returned values are -1.
a proposed height for allocation
location to store the minimum width, or %NULL
location to store the natural width, or %NULL
3.0
See Implementation
Gets the accumulative preferred width for @height for all rows which have been requested for the same said @height with this context.
After gtk_cell_area_context_reset() is called and/or before ever requesting the size of a #GtkCellArea, the returned values are -1.