Re: g_signal_emit()

[dhk <dhkuhl optonline net>]

dhk wrote:
> Kristian Rietveld wrote:
> > On Sun, Aug 31, 2008 at 2:08 PM, dhk <dhkuhl optonline net> wrote:
> > > > I have two callback functions.  The first for when a cell in a treeview
> > > > gets edited and the second for when the tab key is pressed.  The 
> > > > first works
> > > > fine.  In the second, I want to emit the "edited" signal so it acts 
> > > > as if
> > > > the first event happened.  However, the g_signal_emit() in the
> > > > "key-press-event" callback does not seem to work.
> > > >
> > > > I am doing the following and the renderer and sig_id are valid.
> > > >
> > > > sig_id=g_signal_lookup("edited", G_OBJECT_TYPE(renderer));
> > > > g_signal_emit(renderer, sig_id, 0);
> >
> > It looks like you are trying to emit the edited signal here without
> > specifying the correct arguments.
> >
> > > In short what I'm trying to do is emit the "edited" event when the
> > > "key-press-event" occurs.  That way when the use tabs off the cell in 
> > > the
> > > treeview the callback for the "edited" event is called.  It doesn't make
> > > sense the if there are two way to leave a cell (tabbing off it or 
> > > clicking
> > > outside of it) that you can't call the same event.
> >
> > Maybe you can try using gtk_cell_editable_editing_done() here?  The
> > editing-done signal handler of the respective cell editable will take
> > care of emitting the edited signal.  You can get hold of the correct
> > cell editable by listening for the editing-started signal on the cell
> > renderer.
> >
> >
> > regards,
> >
> > -kris.
> That sounds like it could work.  I'll see if I can get the 
> GtkCellEditable from gtk_cell_renderer_start_editing().  That seems to 
> take a lot of parameter that I don't have.  I'll let you know what happens.
>
> Thanks,
> dave
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Kris, that was a great idea.  The tricky part was getting the 
GtkCellEditable pointer without doing a lot of work.  Doing a lot of 
work usually means I'm doing something wrong.  After looking at the gtk 
source, I was able to come up with the following four lines.  It will 
emit the "edited" signal from a "key-press-event" callback.

gtk_tree_view_get_cursor(GTK_TREE_VIEW(treeview), &tp, &focus_column);
if(focus_column!=NULL) {
  gtk_cell_editable_editing_done(focus_column->editable_widget);
}

Thanks,

dave