[gimp] app: more coordinate conversion in GimpContainerTreeView.

[Jehan <jehanp src gnome org>]

commit 9b7c868f4d022069325e5a1df8813bbd7ddbef1f
Author: Jehan <jehan girinstud io>
Date:   Tue Mar 9 22:12:51 2021 +0100

    app: more coordinate conversion in GimpContainerTreeView.

 app/widgets/gimpcontainertreeview-dnd.c | 3 +++
 app/widgets/gimpcontainertreeview.c     | 3 +++
 2 files changed, 6 insertions(+)
---
diff --git a/app/widgets/gimpcontainertreeview-dnd.c b/app/widgets/gimpcontainertreeview-dnd.c
index 37aec76ebf..da073f27a6 100644
--- a/app/widgets/gimpcontainertreeview-dnd.c
+++ b/app/widgets/gimpcontainertreeview-dnd.c
@@ -253,6 +253,9 @@ gimp_container_tree_view_drop_status (GimpContainerTreeView    *tree_view,
       g_object_unref (renderer);
 
       gtk_tree_view_get_cell_area (tree_view->view, drop_path, NULL, &cell_area);
+      gtk_tree_view_convert_bin_window_to_widget_coords (tree_view->view,
+                                                         cell_area.x, cell_area.y, &cell_area.x, 
&cell_area.y);
+
 
       if (gimp_viewable_get_children (dest_viewable))
         {
diff --git a/app/widgets/gimpcontainertreeview.c b/app/widgets/gimpcontainertreeview.c
index c346ba5699..6177aa0621 100644
--- a/app/widgets/gimpcontainertreeview.c
+++ b/app/widgets/gimpcontainertreeview.c
@@ -451,6 +451,9 @@ gimp_container_tree_view_popup_menu (GtkWidget *widget)
   path = gtk_tree_model_get_path (tree_view->model, &iter);
   gtk_tree_view_get_cell_area (tree_view->view, path,
                                tree_view->main_column, &rect);
+  gtk_tree_view_convert_bin_window_to_widget_coords (tree_view->view,
+                                                     rect.x, rect.y,
+                                                     &rect.x, &rect.y);
   gtk_tree_path_free (path);
 
   return gimp_editor_popup_menu_at_rect (GIMP_EDITOR (widget),