Re: [gtkextra] labels in the X axis

hi!

>   I'm using GtkPlot and Gtkextra, and i don't know how
> i can put labels like (Monday, thuesday, ...) in X
> axis, i sow iin the examples of Scigraphica that it
> coull be posible.

have a look at testgtkplot.c for these lines:

/* lines 217-226 */
my_tick_label(GtkPlotAxis *axis, gdouble *tick_value, gchar *label,
gpointer data)
{
  gboolean return_value = FALSE;

  if(*tick_value == 0.0){
    g_snprintf(label, 100, "custom label at 0.0");
    return_value = TRUE;
  }
  return return_value;
}

/* lines 246-249 */
gtk_plot_axis_use_custom_tick_labels(GTK_PLOT(active_plot),
GTK_PLOT_AXIS_RIGHT, TRUE);
axis = gtk_plot_get_axis(GTK_PLOT(active_plot), GTK_PLOT_AXIS_RIGHT);
gtk_signal_connect(GTK_OBJECT(axis), "tick_label", 
                   GTK_SIGNAL_FUNC(my_tick_label), NULL);


if you want to use your custom x-labels you just have to use the
GTK_PLOT_AXIS_BOTTOM instead and use your custom tick_label handler. in
this handler you could read the numerical x-value through *tick_value,
convert it to a string representing a day and save the string in 'label' as
shown above.

hint: if you use dates as x-values it is perhaps most useful to use the
time_t (an integer) as the numerical representation and the strftime() or a
simillar function to convert it into a string representation.

greetings,
tobias

-- 
tobias rapp  --  homepage: http://yahuxo.de

stimm mit gegen die schwerkraft: http://yahuxo.de/guestbook.html



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