Re: Decorating scales

["Tristan Van Berkom" <tvb gnome org>]

On Tue, Jan 6, 2009 at 12:41 AM, Yu Feng <rainwoodman gmail com> wrote:
> Hi,
>
> If GtkRange were a gtk container perhaps using gtk_container_xxx with
> child_properties will be an alternative. GtkContainer also has bettern
> granularity - the programmers can modify/remove each marker
> individually.
>
> Unfortunately it isn't a Container.

Oh yeah, time for those GContainer/GContainable interfaces, nudge nudge ;-)

Wink,
              -Tristan

>
> Regards,
>
> Yu
> On Tue, 2009-01-06 at 00:31 -0500, Matthias Clasen wrote:
>> 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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>
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