Gets the accumulative preferred height for width for all rows which have been requested for the same said width with this context.
After gtk.cell_area_context.CellAreaContext.reset is called and/or before ever requesting the size of a #GtkCellArea, the returned values are -1.
a proposed width for allocation
location to store the minimum height, or null
location to store the natural height, or null
Gets the accumulative preferred height for width for all rows which have been requested for the same said width with this context.
After gtk.cell_area_context.CellAreaContext.reset is called and/or before ever requesting the size of a #GtkCellArea, the returned values are -1.