Re: GtkTreeView selection- troubles in managing "changed" signal

[Rosa Mannini <rosma77 yahoo com>]

Sorry ...
I just tried with gtk_tree_view_set_cursor .... it
works!!!!!!

Thank you very much!!!!!

Rosa



 --- Rosa Mannini <rosma77@yahoo.com> ha scritto: > 
--- Kristian Rietveld <kris@gtk.org> ha scritto: >
> On
> Tue, 2003-10-14 at 10:02, Rosa Mannini wrote:
> > > I can't understand why for the real FIRST time I
> > > select an item different from the first one (row
> 0
> > of
> > > the list) the row 0 is selected automatically,
> and
> > 
> > When the GtkTreeView gets focus for the first time
> > (for example when the
> > application window is showed up for the first
> time),
> > it will check if
> > the cursor has been set. If not, it will set the
> > cursor on row 0 by
> > default, and this is what's happening here.
> > 
> > The problem is that we can't change that behavior
> at
> > this time. To get
> > around it you have two options:
> > 
> > - Set the cursor on row "0" yourself (using
> > gtk_tree_view_set_cursor)
> > before connecting to the changed signal.
> > - Keep a boolean value "first_sel_changed",
> > initially set to TRUE, and
> > make your ::changed signal handler look like this:
> > 
> > void selection_changed (GtkTreeSelection *sel,
> > gpointer data)
> > {
> >   if (first_sel_changed)
> >     {
> >       first_sel_changed = FALSE;
> >       return;
> >     }
> > 
> >   /* else do stuff */
> > }
> > 
> > So the first changed signal will be ignored. (If
> you
> > are using a struct
> > or object to keep your widgets together, it's of
> > course a very good idea
> > to put this boolean there).
> > 
> > 
> I haven't already test your advice .. but I have
> some
> doubts about the possibility it has to work. As I
> said
> in my PS I tried to use a counter, that is very
> similar to the boolean parameter. But if the first
> really selected row is really row 0 the signal isn't
> emitted.
> 
> Do you think your implementation will have a
> different
> beaviour?
> > 
> 
> Thank you very very much!!!!
> Rosa
> 
> 
> 
>
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