Re: Graphing - axis tick autospacing

[Jody Goldberg <jody gnome org>]

On Wed, Oct 15, 2003 at 04:05:42PM +0200, Jean Brefort wrote:
> After more reflection, I think that the zero pull should be optionnaly
> removed at least for xy plots as is usual in scientific works (a check
> box can be added in the axis properties page).

I was against adding yet another flag to the axis bound
specification.  However, we're going to need a few extras for radial
plots so I've decided that instead of adding more aguments to :

        GOData    *(*axis_bounds)       (GogPlot *plot, GogAxisType axis,
                                         double *min, double *max,
                                         double *logical_min, double *logical_max,
                                         gboolean *is_discrete);

I'll move to

        struct {
                unsigned fields_of_interest;

                double  minima, maxima;
                double  logical_minima, logical_maxima,
                unsigned   n;
                gboolean   pull_to_zero;
                gboolean   is_discrete;
                GOData    *discrete_labels;
        } GogAxisBounds;
        void (*axis_bounds)  (GogPlot *plot, GogAxisType a, GogAxisBounds *res);

I'd still like to keep the number of fields relatively low, but it
will give us better support for discrete axis labels, and will allow
for N & max specification for radial plots.