Hi, I'm trying to put a ComboBoxEntry inside a TreeView (and inside my Grid) so I made a CellRendererCombo for this purpose. I also added a minimal implementation of the GtkCellEditable interface to GtkComboBox. By the way, I'm using GTK+-2.4.0. So, in the start_editing method of CellRendererCombo I create a new GtkComboBox and return it. Then GtkTreeViewColumn gets it and gives it to GtkTreeView, which make that combo box its own child (via the gtk_tree_view_put method). This is exactly the same that the GtkCellRendererText does with GtkEntry. And it also worked for me for a CellRendererSpin with a GtkSpinButton. But, GtkComboBox is a no (gdk) window widget and I think that's why I'm not getting good results [1]. [1] http://www.sicem.biz/personal/lgs/hacks/combo-problem.jpg The problem is that the expose method of GtkComboBox is not being called and that's why the button with the arrow is not drawn. I didn't give up and I tried the following code in the start_editing of the ComboBox (not the start_editing method of the CellRendererCombo): static void gtk_combo_box_start_editing (GtkCellEditable *cell_editable, GdkEvent *event) { GtkWidget *widget; widget = GTK_WIDGET (cell_editable); gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE); } I also tried with gtk_widget_queue_draw (widget) instead of gdk_window_invalidate but none of them worked. Now I'm pretty lost as I don't really know how drawing works in GTK+ for non window widgets. I just know that they use the gdk window of their parent to draw themselves but this knowledge doesn't help too much. Any clue? Thanks in advance Lorenzo _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list