Allocates a width and/or a height for all rows which are to be
rendered with @context.
Usually allocation is performed only horizontally or sometimes
vertically since a group of rows are usually rendered side by
side vertically or horizontally and share either the same width
or the same height. Sometimes they are allocated in both horizontal
and vertical orientations producing a homogeneous effect of the
rows. This is generally the case for #GtkTreeView when
#GtkTreeView:fixed-height-mode is enabled.
Allocates a width and/or a height for all rows which are to be rendered with @context.
Usually allocation is performed only horizontally or sometimes vertically since a group of rows are usually rendered side by side vertically or horizontally and share either the same width or the same height. Sometimes they are allocated in both horizontal and vertical orientations producing a homogeneous effect of the rows. This is generally the case for #GtkTreeView when #GtkTreeView:fixed-height-mode is enabled.