Re: scrolledview

[James Scott Jr <skoona verizon net>]

On Thu, 2007-02-08 at 05:53 +0000, tomas tuxteam de wrote:

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> On Wed, Feb 07, 2007 at 08:32:26PM +0100, Mehmet YASAR wrote:
> > tomas tuxteam de a Ãcrit :
> [...]
> > > > how can I know that all the widget have done their size negotiations ?
> > > > I can't rely on the "realized" signal since the gtkvbox is already realized ...
> > >
> > > I'd put my bets on the widget's size-allocate signal -- but I don't know
> > > for sure.
> >
> > I had already done some experimentation and I've found that widgets may 
> > get more than one size-allocate signal.
>
> [...]
>
> Yes, I suppose you'd have to "track" the size as it changes. If you have
> to do an action  hwenever the size really, truly changed (meaning it has
> been displayed and all is quiescent), perhaps an idle handler would be
> the right place.
>
> Regards
> - -- tomÃs
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Mehmet,

An idle handler would be a good fit here.  I assumed that you are
creating and filling textviews during the startup of your program and
possibly before you enter the main_loop or gtk_main.  Or possibly in a
routine that does everything at once.  Here is the potential problem:
your create and populate actions require some additional gtk messages to
be processed, which are waiting to get serviced by the gtk_main() loop.
So thing s will not appear to settle down until after the gtk_main has
been allowed to run.  Using an idle handler puts your call to a
Position/Size routine at the back of the waiting queue of needed
messages, so by the time it's processed the other messages have done
their job and all the textviews/scrollbars/gtkvboxes, and scrolled
windows have settled down.  -- wait, this assumes you issued a
gtk_widget_show{_all} on the main window containing all this stuff!  Its
the gtk_widget_show that starts the cascade of messages which includes
the size and realize messages.  

g_idle_add() or g_timeout_add(250,...) show do the trick.

James,



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James Scott, Jr.                                                 
Registered Linux User #270764
FC6 on Dual AMD-MP 2400+
Author: {gfhcm, gkrellfah2,gapcmon,giw}.sourceforge.net
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