[goffice] Radar/Polar: improve handling of log axis.

[Morten Welinder <mortenw src gnome org>]

commit ba078227e0445d496111f5317808ac1b632dee95
Author: Morten Welinder <terra gnome org>
Date:   Wed Mar 25 08:27:43 2015 -0400

    Radar/Polar: improve handling of log axis.

 ChangeLog                      |    6 ++++++
 NEWS                           |    1 +
 plugins/plot_radar/gog-radar.c |   17 +++++++++++------
 3 files changed, 18 insertions(+), 6 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index e50898b..083e626 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2015-03-25  Morten Welinder  <terra gnome org>
+
+       * plugins/plot_radar/gog-radar.c (gog_rt_plot_update): Handle log
+       radial axis better.
+       (gog_polar_plot_axis_get_bounds): Ditto.
+
 2015-03-24  Morten Welinder  <terra gnome org>
 
        * plugins/plot_barcol/gog-1.5d.c (gog_plot1_5d_axis_get_bounds):
diff --git a/NEWS b/NEWS
index d85cc6b..7f60a6c 100644
--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,7 @@ Morten:
        * Improve log axis bounds.
        * Fix format used for stacked percentage graphs.
        * Don't force bar/col axis to include 0 for log axis.
+       * Don't force radial plots to include 0 for log axis.
 
 --------------------------------------------------------------------------
 goffice 0.10.21:
diff --git a/plugins/plot_radar/gog-radar.c b/plugins/plot_radar/gog-radar.c
index 3bcb466..7dc85d2 100644
--- a/plugins/plot_radar/gog-radar.c
+++ b/plugins/plot_radar/gog-radar.c
@@ -159,6 +159,7 @@ gog_rt_plot_update (GogObject *obj)
        double val_min, val_max, tmp_min, tmp_max;
        GSList *ptr;
        GogErrorBar *errors;
+       GogAxis *raxis = model->base.axis[GOG_AXIS_RADIAL];
 
        val_min =  DBL_MAX;
        val_max = -DBL_MAX;
@@ -169,7 +170,7 @@ gog_rt_plot_update (GogObject *obj)
 
                if (num_elements < series->base.num_elements)
                        num_elements = series->base.num_elements;
-               go_data_get_bounds (series->base.values[1].data, &tmp_min, &tmp_max);
+               gog_axis_data_get_bounds (raxis, series->base.values[1].data, &tmp_min, &tmp_max);
                if (val_min > tmp_min) val_min = tmp_min;
                if (val_max < tmp_max) val_max = tmp_max;
 
@@ -187,7 +188,7 @@ gog_rt_plot_update (GogObject *obj)
        if (model->r.minima != val_min || model->r.maxima != val_max) {
                model->r.minima = val_min;
                model->r.maxima = val_max;
-               gog_axis_bound_changed (model->base.axis [GOG_AXIS_RADIAL], GOG_OBJECT (model));
+               gog_axis_bound_changed (raxis, GOG_OBJECT (model));
        }
 
        model->t.minima = 1;
@@ -479,25 +480,29 @@ gog_polar_plot_type_name (G_GNUC_UNUSED GogObject const *item)
 }
 
 static GOData *
-gog_polar_plot_axis_get_bounds (GogPlot *plot, GogAxisType axis,
+gog_polar_plot_axis_get_bounds (GogPlot *plot, GogAxisType atype,
                                GogPlotBoundInfo * bounds)
 {
        GogRTPlot *rt = GOG_RT_PLOT (plot);
+       GogAxis *axis = gog_plot_get_axis (plot, atype);
 
-       switch (axis) {
+       switch (atype) {
        case GOG_AXIS_CIRCULAR:
                bounds->val.minima = bounds->logical.minima= -G_MAXDOUBLE;
                bounds->val.maxima = bounds->logical.maxima=  G_MAXDOUBLE;
                bounds->is_discrete    = FALSE;
                break;
        case GOG_AXIS_RADIAL:
-               bounds->val.minima = bounds->logical.minima = 0.;
+               bounds->val.minima = bounds->logical.minima =
+                       gog_axis_is_zero_important (axis)
+                       ? 0.0
+                       : rt->r.minima;
                bounds->val.maxima = rt->r.maxima;
                bounds->logical.maxima = go_nan;
                bounds->is_discrete = FALSE;
                break;
        default:
-               g_warning("[GogPolarPlot::axis_set_bounds] bad axis (%i)", axis);
+               g_warning("[GogPolarPlot::axis_set_bounds] bad axis (%i)", atype);
                break;
        }