Re: Recording widget motion

["Samuel Cormier-Iijima" <sciyoshi gmail com>]

Yea... after thinking about it more I think I'll stick with either
implementing my own widget or using a graph widget (time vs value)
that the user can edit with a pencil, eraser, or line (how reason does
it).

On 9/7/06, David Nečas (Yeti) <yeti physics muni cz> wrote:
> On Thu, Sep 07, 2006 at 09:42:16AM -0400, Samuel Cormier-Iijima wrote:
> >
> > I thought g_timeout_add
> > would cause timing to be off (it would unsynchronize over time), but
> > using a GTimer fixed it.
>
> Yes, g_timeout_add() is just a best-effort timer, no
> real-time.  But many apps do not need to run the callbacks
> in precise intervals, they only need to know precisely when
> the callback is actually called -- and this can be done with
> a GTimer as you did.
>
> > The problem I'm currently having is this: I'd
> > like to know when the user is "holding" the slider, that is, has the
> > mouse button pressed on the slider itself, not in the "trough", so
> > that the user can record "over" his previous recording. This is kinda
> > hard to explain, and I'm not sure if it's a good idea from a UI point
> > of view...
>
> I think I understand, but I'm afraid Gtk+ provides no public
> interface for that.  Especially the extreme no-motion case
> is hardly detectable, that is when user just presses the
> slider but does not move it at all to set a fixed value over
> a time interval.  IMO it's not a bad UI idea, except that
> the value the slider `wants' at given moment (from previous
> recording) becomes invisible once you press it.  So it's
> hard not to cause a jump when you release it.  But it can be
> visualized somehow.
>
> In similar situations one can fork the Gtk+ widget and add
> the required functionality, although in this case the fork
> would have to include at least GtkRange, GtkScale, GtkHScale
> and/or GtkVScale.
>
> Yeti
>
>
> --
> Anonyms eat their boogers.
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