Re: forcing immediate redraw on widget

[M Santhoff t-online de (Marc Santhoff)]

Am Di, den 27.04.2004 schrieb Gus Koppel um 01:57:
> Marc Santhoff wrote:
>
> > > Your latest description sounds like a different problem than the one
> > > I understood and tried to help you with. Am I right that your actual
> > > problem isn't just to redraw the widget *immediately* but rather to
> > > redraw the widget with a changed appearance *at all*? In this case
> > > for a GtkHScale? So your problem is actually "how to change the
> > > appearance of a GtkHScale" and not "how to immediately redraw a
> > > widget"?
> >
> > It is both:
> >
> > Setting the bg color on the hscale does work, but the changed color
> > shows effect only after the value of the slider is changed by mouse or
> > keyboard. And it does change only at the area where the slider has
> > been resulting in sort of a dashed line.
> >
> > In this situation i decided to force the redraw for circumventing this
> > behaviour.
>
> So changing the attribute (BG colour) of the GtkHScale basically works
> for you but your problem is still that it doesn't get completely redrawn
> immediately? So your problem is simply that the lines
>
>     gtk_widget_queue_draw (widget_to_redraw);
>     while (gtk_events_pending ())
>         gtk_main_iteration ();
>
> have no effect at all for you? You know, you have to place those lines

Yes, exactly.

> after(!) the location where you change the attributes of the widget,
> i.e. your former code example!?

Sure, they follow directly after the changing code. :)

If this works on GtkHScales at all, i wonder why it doesn't for me. The
only thing to mention is that the function doing this is called from a
generic event handler (bound on both hscales at "event") for catching
special keystrokes (F5...F8). If a key is trapped the function returns
TRUE for signalling the event is handled, otherwise returning FALSE.

Any further ideas?

Marc