rem: cell_renderer = gtk_cell_renderer_text_new ();
add: if ( i ) { cell_renderer = gtk_cell_renderer_text_new ();  column = gtk_tree_view_column_new_with_attributes ( titres_colonnes_liste_operations[i], cell_renderer, "text", i, "cell-background-gdk", TRANSACTION_COL_NB_BACKGROUND, "font-desc", TRANSACTION_COL_NB_FONT, NULL ); } else { cell_renderer = gtk_cell_renderer_pixbuf_new ();  column = gtk_tree_view_column_new_with_attributes ( titres_colonnes_liste_operations[i], cell_renderer, "pixbuf-expander-closed", TRANSACTION_COL_NB_PIXBUF_CLOSED, "pixbuf-expander-open", TRANSACTION_COL_NB_PIXBUF_OPEN, "is-expanded", TRANSACTION_COL_NB_IS_EXPANDED, "is-expander", TRANSACTION_COL_NB_IS_EXPANDER, "cell-background-gdk", TRANSACTION_COL_NB_BACKGROUND, NULL ); }
context: void creation_colonnes_tree_view_par_compte ( gint no_compte ){    gint i;    gfloat alignement[] = {	COLUMN_CENTER,	COLUMN_CENTER,	COLUMN_LEFT,	COLUMN_CENTER,	COLUMN_RIGHT,	COLUMN_RIGHT,	COLUMN_RIGHT    };    gint column_balance;    /*     on récupère la position de cellule du solde pour pouvoir le mettre en rouge */    column_balance = find_balance_col ();    for ( i = 0 ; i < TRANSACTION_LIST_COL_NB ; i++ )    {	GtkTreeViewColumn *column;	GtkCellRenderer *cell_renderer;	cell_renderer = gtk_cell_renderer_text_new ();	g_object_set ( G_OBJECT ( GTK_CELL_RENDERER (cell_renderer )),		       "xalign",		       alignement[i],		       NULL );	column = gtk_tree_view_column_new_with_attributes ( titres_colonnes_liste_operations[i],							    cell_renderer,							    "text", i,							    "background-gdk", 7,							    "font-desc", 11,							    NULL );	gtk_tree_view_column_set_alignment ( column,					     alignement[i] );	gtk_tree_view_column_set_sizing ( column,					  GTK_TREE_VIEW_COLUMN_FIXED );	gtk_tree_view_column_set_sort_column_id ( column,						  i );	if ( etat.largeur_auto_colonnes )	    gtk_tree_view_column_set_resizable ( column,						 FALSE );	else	    gtk_tree_view_column_set_resizable ( column,						 TRUE );	gsb_account_set_column ( no_compte,				 i,				 column);    }    /*     pour la colonne du solde, on rajoute le foreground */    if ( column_balance != -1 )	gtk_tree_view_column_add_attribute ( gsb_account_get_column ( no_compte, column_balance),					     gtk_tree_view_column_get_cell_renderers ( gsb_account_get_column ( no_compte, column_balance)) -> data,					     "foreground", 8 );}