setting axis limits weirdness

[Ben Abbott]

On Sep 24, 2008, at 3:07 AM, Michael Goffioul wrote:

> On Tue, Sep 23, 2008 at 5:37 PM, Ben Abbott  
> <benjamin.abbott at tqs.com> wrote:
>> hmmm ...
>>
>> I notice that a subsequent attempt to set the limits does work.
>>
>> x = [-0.1, 1.0];
>> y = [-0.7, 0.7];
>> figure (1, 'visible', 'off');
>> h = plot (x, y);
>> set (gca, 'xlim', x);
>> set (gca, 'ylim', y);
>> set (gca, 'xlim', x);
>> set (gca, 'ylim', y);
>> xlimits = get (gca, 'xlim')
>>
>> Looks like the limmode is switching to manual a bit late.
>
> The problem is that xlimmode is switched to manual
> after calling the updater (update_xlim). This updater is
> responsible for computing the tick marks, but when it
> is called, xlimmode is still auto. I think the fix would be
> to switch xxxmode properties before anything else in
> genprops.awk. This might have other unwanted side effects,
> but the only way to know is to try it.
>
> Ben or John, could you take care of the change (it's only
> moving 2 lines of code in genprops.awk, around line 341)?
>
> Michael.

Michael,

Can you be more specific. Is it as simple as placing "limits[i]" ahead  
of "updater[i]"?

324     if (emit_set[i])
325     {
326       printf ("  void set_%s (const octave_value& val)", name[i],  
type[i]);
327
328       if (emit_set[i] == "definition")
329       {
330         if (updaters[i] || limits[i] || mode[i])
331           has_builtin_listeners = 1;
332         else
333           has_builtin_listeners = 0;
334
335         printf ("\n  {\n    if (! error_state)\n      {\n         
if (%s.set (val, %s))\n          {\n",
336           name[i], (has_builtin_listeners ? "false" : "true"));
337         if (updater[i])
338           printf ("            update_%s ();\n", name[i]);
339         if (limits[i])
340           printf ("            update_axis_limits (\"%s\");\n",  
name[i]);
341         if (mode[i])
342           printf ("            set_%smode (\"manual\");\n",  
name[i]);
343         if (has_builtin_listeners)
344           printf ("            %s.run_listeners (POSTSET);\n",  
name[i]);
345         printf ("            mark_modified ();\n");
346         printf ("          }\n");
347         if (mode[i])
348           printf ("        else\n          set_%smode (\"manual\"); 
\n", name[i]);
349         printf ("      }\n  }\n\n");
350       }
351       else
352         printf (";\n\n");
353     }

Ben