Re: Get column no. of edited cell.

[dE <de techno gmail com>]

On 06/02/13 14:30, Arnel A. Borja wrote:
> On Sunday, 02 June, 2013 03:35 PM, dE wrote:
> > On 06/02/13 12:49, Arnel A. Borja wrote:
> > > On Sunday, 02 June, 2013 02:15 PM, dE wrote:
> > > > I'm trying this out, but isnt this also possible with 
> > > > gtk_tree_view_get_cursor clubbed with 
> > > > gtk_tree_view_column_get_sort_column_id.
> > > >
> > > > Cause I'm getting segfault with --
> > > >
> > > > gtk_tree_view_get_cursor ( detect_object ( "DataDisplay", 
> > > > build_object ), tree_path, focus_column );
> > > >
> > > > Where --
> > > >
> > > > GtkTreeViewColumn **focus_column;
> > > > GtkTreePath **tree_path;
> > >
> > > This is what the documentation says about the parameters of 
> > > gtk_tree_view_get_cursor 
> > > (https://developer.gnome.org/gtk3/stable/GtkTreeView.html#gtk-tree-view-get-cursor):
> > > /|
> > > tree_view|/ : A GtkTreeView
> > > /|path|/ : A pointer to be filled with the current cursor path, 
> > > orNULL.*[**out**]*[transfer full][allow-none]
> > > /|focus_column|/: A pointer to be filled with the current focus 
> > > column, orNULL.*[**out**]*[transfer full][allow-none]
> > >
> > > Noticed the [out] in path and focus column? That means you have to 
> > > pass the pointers to a (GtkTreeViewColumn *) variable and a 
> > > (GtkTreePath *) variable, instead of passing a (GtkTreeViewColumn 
> > > **) variable and a (GtkTreePath **) variable.
> > >
> > > You may do something like this then:
> > >
> > > GtkTreeViewColumn *focus_column;
> > > GtkTreePath *tree_path;
> > >
> > > gtk_tree_view_get_cursor ( detect_object ( "DataDisplay", 
> > > build_object ), &tree_path, &focus_column );
> > >
> > > Now focus_column and tree_path contains the currently focused column 
> > > and path to its row, respectively.
> >
> > Yes, now it works. Thanks!
> >
> > However, it appears that this is not something suitable for the task, 
> > since this particular event "edited" (GtkCellRender) is triggered 
> > after the editing has finished. As a result, I get -1 with 
> > gtk_tree_view_column_get_sort_column_id (focus_column).
> >
> > So I've tried out your original technique, but I'm having some issues 
> > there --
> >
> > I'm comparing the passed over GtkCellRenderer * with all renderers as 
> > such --
> >
> >     while ( mod_renderer != *(renderer + i) )
> >         i++;
> >
> > Where mod_renderer is the passed over GtkCellRenderer and renderer 
> > is  --
> >
> > GtkCellRenderer **renderer;
> >
> > and allocated memory via --
> >
> > GtkCellRenderer **renderer = g_malloc (sizeof (GtkCellRenderer*) * 2);
> >     renderer[0] = gtk_cell_renderer_text_new ();
> >     renderer[1] = gtk_cell_renderer_text_new ();
> >
> > I'm getting sefault in the while loop.
> Your comparing a GtkCellRenderer and a GtkCellRendererText here. Try 
> casting like this:
>
> while (GTK_CELL_RENDERER (mod_renderer) != GTK_CELL_RENDERER 
> (renderer[i]))
>     i++;
>
> Or just store them as GtkCellRendererText:
>
> GtkCellRendererText **renderer = g_malloc (sizeof 
> (GtkCellRendererText*) * 2);
> renderer[0] = gtk_cell_renderer_text_new ();
> renderer[1] = gtk_cell_renderer_text_new ();
>
> But still, this is quite dangerous, since mod_renderer may really not 
> in renderer. You may use if/else blocks:
>
> /* mod_renderer and renderer[i] should be GtkCellRendererText */
> if (mod_renderer == renderer[0])
> {
>     /* renderer[0] edited */
> }
> else if (mod_renderer == renderer[1])
> {
>     /* renderer[1] edited */
> }
>
> Though usually when I want to do something like this, I would connect 
> to each cell renderer, with each one have their own callback.
>
> Something like this:
>
> renderer1 = gtk_cell_renderer_text_new ();
> g_signal_connect (renderer1, "edited", on_renderer1_edited, my_data);
>
> renderer2 = gtk_cell_renderer_text_new ();
> g_signal_connect (renderer2, "edited", on_renderer2_edited, my_data);
>
> Then I'll just do what I need to do inside the two callbacks.
>
> You may also want to read this tutorial about GtkTreeView's: 
> http://scentric.net/tutorial/


YES GOT IT!!

It was g_object_get/set_data. Although I did view that tutorial, but not 
in that much detail.

Thank you so much!!