gfio: hide graph if all values are zero
If all visible data points in a label are zero, don't display it
and don't show tooltips.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/graph.h b/graph.h
index 0099525..2315045 100644
--- a/graph.h
+++ b/graph.h
@@ -86,6 +86,7 @@
extern int graph_contains_xy(struct graph *p, int x, int y);
extern void graph_set_base_offset(struct graph *g, unsigned int base_offset);
+extern void graph_set_graph_all_zeroes(struct graph *g, unsigned int set);
#endif