Over the Christmas vacation, I spent a day adding marks to scales. The motivation for this came from the new sound preferences capplet, which uses a GtkHScale for balance control. Jon did a nice job of adding Left/Right labels (see the screenshot), but what is really missing here is an easy to hit midpoint. So I wrote a patch for GtkRange and GtkScale that allows to add 'marks' to certain values. When dragging the scale over one of these marked values, there is a little resistance that makes it easy to select the exact value. The api also allows to show a label or icon next to the mark. http://bugzilla.gnome.org/attachment.cgi?id=125318&action=view shows the various possibilities. I'd like to get this functionality into 2.16, if nobody objects, but I'm not entirely sure that I have managed to come up with the best possible api for this yet: +void gtk_scale_add_mark (GtkScale *scale, + gdouble value, + GtkPositionType position); +void gtk_scale_add_mark_text (GtkScale *scale, + gdouble value, + GtkPositionType position, + const gchar *markup); +void gtk_scale_add_mark_icon (GtkScale *scale, + gdouble value, + GtkPositionType position, + GIcon *icon); +void gtk_scale_clear_marks (GtkScale *scale); Feedback appreciated, Matthias
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