[gimp] Make sure all group layers' projections switch to GEGL with the main projection

[Michael Natterer <mitch src gnome org>]

commit 6934a0d2eb8a7bc17bb3ec1b46fbbc82b3312357
Author: Michael Natterer <mitch gimp org>
Date:   Mon Aug 24 22:38:16 2009 +0200

    Make sure all group layers' projections switch to GEGL with the main projection

 app/actions/view-commands.c |   16 ++++++++++++++++
 app/core/gimpgrouplayer.c   |    3 +++
 2 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/app/actions/view-commands.c b/app/actions/view-commands.c
index b5d12c4..16a648d 100644
--- a/app/actions/view-commands.c
+++ b/app/actions/view-commands.c
@@ -30,6 +30,7 @@
 #include "core/gimp.h"
 #include "core/gimpcontext.h"
 #include "core/gimpimage.h"
+#include "core/gimpgrouplayer.h"
 #include "core/gimpprojection.h"
 
 #include "display/gimpdisplay.h"
@@ -690,6 +691,8 @@ view_use_gegl_cmd_callback (GtkAction *action,
   GimpImage        *image;
   GimpDisplay      *display;
   GimpDisplayShell *shell;
+  GList            *layers;
+  GList            *list;
   gboolean          active;
   return_if_no_image (image, data);
   return_if_no_display (display, data);
@@ -699,6 +702,19 @@ view_use_gegl_cmd_callback (GtkAction *action,
   active = gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action));
 
   image->projection->use_gegl = active;
+
+  layers = gimp_image_get_layer_list (image);
+
+  for (list = layers; list; list = g_list_next (list))
+    {
+      GimpLayer *layer = list->data;
+
+      if (GIMP_IS_GROUP_LAYER (layer))
+        GIMP_GROUP_LAYER (layer)->projection->use_gegl = active;
+    }
+
+  g_list_free (layers);
+
   gimp_image_update (image, 0, 0, image->width, image->height);
   gimp_image_flush (image);
 }
diff --git a/app/core/gimpgrouplayer.c b/app/core/gimpgrouplayer.c
index 12f7912..cf7ea01 100644
--- a/app/core/gimpgrouplayer.c
+++ b/app/core/gimpgrouplayer.c
@@ -592,6 +592,9 @@ gimp_group_layer_new (GimpImage *image)
                            gimp_image_base_type_with_alpha (image),
                            _("Group Layer"));
 
+  if (gimp_image_get_projection (image)->use_gegl)
+    group->projection->use_gegl = TRUE;
+
   return GIMP_LAYER (group);
 }