added --alt-autoscale-min (see --alt-autoscale-max) -- Helge Oldach

[rrdtool.git] / src / rrd_graph.c

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 47c187ad981db4c6ec19046dd95a5639f6220d1c..e7554ac632b80648cfe3e728a74dbf1379dd4f57 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -399,6 +399,13 @@ expand_range(image_desc_t *im)
               im->minval -= adj;
               im->maxval += adj;
         }
+       else if(im->extra_flags & ALTAUTOSCALE_MIN) {
+           /* measure the amplitude of the function. Make sure that
+              graph boundaries are slightly lower than min vals
+              so we can see amplitude on the graph */
+             adj = (im->maxval - im->minval) * 0.1;
+             im->minval -= adj;
+       }
         else if(im->extra_flags & ALTAUTOSCALE_MAX) {
             /* measure the amplitude of the function. Make sure that
                graph boundaries are slightly higher than max vals
@@ -3223,6 +3230,7 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
             {"no-minor",   no_argument,       0,  'I'},
             {"slope-mode", no_argument,              0,  'E'},
             {"alt-autoscale", no_argument,    0,  'A'},
+           {"alt-autoscale-min", no_argument, 0, 'J'},
             {"alt-autoscale-max", no_argument, 0, 'M'},
             {"no-gridfit", no_argument,       0,   'N'},
             {"units-exponent",required_argument, 0, 'X'},
@@ -3255,6 +3263,9 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
             break;
         case 'A':
             im->extra_flags |= ALTAUTOSCALE;
+           break;
+       case 'J':
+           im->extra_flags |= ALTAUTOSCALE_MIN;
             break;
         case 'M':
             im->extra_flags |= ALTAUTOSCALE_MAX;