Re: GtkComboBox cell rendering?

[Iago Rubio <iago iagorubio com>]

On Sat, 2006-08-19 at 17:22 +0200, Daniel Pekelharing wrote:
> Hi all,
>
> I have for the first had the need of a GtkComboBox in my app...
>
> I am a little confused about how to use it.
>
> I have:
>
> GtkWidget *box;
> GtkTreeList *list = gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_INT);

This GtkTreeList thing is a typo, right? 

> ... fill in the list store ...
>
> box = gtk_combo_box_new_with_model(list);
> ...
>
> However the combo box remains empty.. ?

May be the cell renderers ?

> The documentation mentions that GtkComboBox uses the same cell rendering
> setup as GtkTreeView, but I can find no functions that allow one to set
> rendering attributes..

It implements GtkCellLayout.

> Obviously I'm just missing something obvious somewhere ...
>
> Any ideas / clues?

Check this out:

// save as "test.c",  compile with:
// gcc test.c -o test `pkg-config --cflags --libs gtk+-2.0`
// run with ./test
#include <gtk/gtk.h>

int main(int argc, char **argv)
{
  GtkWidget *dialog, *dialog_vbox;
  GtkWidget *combo;
  GtkListStore *store;
  GtkTreeIter iter;
  GtkCellRenderer *text_renderer;
  
  gtk_init (&argc, &argv);
      
  dialog = gtk_dialog_new();  
  dialog_vbox = GTK_DIALOG (dialog)->vbox;
  gtk_widget_show (dialog_vbox);

  store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT);
  
  combo = gtk_combo_box_new_with_model  (GTK_TREE_MODEL(store));
  gtk_widget_show (combo);
  gtk_box_pack_start (GTK_BOX (dialog_vbox), combo, TRUE, TRUE, 0);

  text_renderer = gtk_cell_renderer_text_new ();
  gtk_cell_layout_pack_start (GTK_CELL_LAYOUT(combo), 
                              text_renderer, TRUE);
  gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT(combo),
                                 text_renderer, "text", 0);  
 
  text_renderer = gtk_cell_renderer_text_new ();
  gtk_cell_layout_pack_end (GTK_CELL_LAYOUT(combo), 
                            text_renderer, TRUE);
  gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT(combo),
                                 text_renderer, "text", 1); 
                                                         
  gtk_list_store_append (store, &iter);
  gtk_list_store_set (store, &iter, 0, "Hi", 1, 0, -1);
  
  gtk_list_store_append (store, &iter);
  gtk_list_store_set (store, &iter, 0, "Hi one", 1, 1, -1);
                   
  g_signal_connect_swapped ( dialog,
                      "response", 
                      gtk_main_quit,
                      NULL );                      
                      
  gtk_widget_show (dialog);
  gtk_main ();
  
  return 0;
}

-- 
Iago Rubio