[gimp] Add action and callback for adding a group layer (works but is not used yet)

[Michael Natterer <mitch src gnome org>]

commit e8bd830f486cb3f76df6185157891ddabd1b6100
Author: Michael Natterer <mitch gimp org>
Date:   Thu Aug 6 18:37:54 2009 +0200

    Add action and callback for adding a group layer (works but is not used yet)

 app/actions/layers-actions.c  |    7 +++++++
 app/actions/layers-commands.c |   18 +++++++++++++++++-
 app/actions/layers-commands.h |    3 +++
 3 files changed, 27 insertions(+), 1 deletions(-)
---
diff --git a/app/actions/layers-actions.c b/app/actions/layers-actions.c
index b60bc30..3064e81 100644
--- a/app/actions/layers-actions.c
+++ b/app/actions/layers-actions.c
@@ -97,6 +97,12 @@ static const GimpActionEntry layers_actions[] =
     G_CALLBACK (layers_new_from_visible_cmd_callback),
     GIMP_HELP_LAYER_NEW_FROM_VISIBLE },
 
+  { "layers-new-group", GTK_STOCK_DIRECTORY,
+    NC_("layers-action", "_New Group Layer..."), NULL,
+    NC_("layers-action", "Create a new group layer and add it to the image"),
+    G_CALLBACK (layers_new_group_cmd_callback),
+    GIMP_HELP_LAYER_NEW },
+
   { "layers-duplicate", GIMP_STOCK_DUPLICATE,
     NC_("layers-action", "D_uplicate Layer"), "<control><shift>D",
     NC_("layers-action",
@@ -544,6 +550,7 @@ layers_actions_update (GimpActionGroup *group,
   SET_SENSITIVE ("layers-new",              image);
   SET_SENSITIVE ("layers-new-last-values",  image);
   SET_SENSITIVE ("layers-new-from-visible", image);
+  SET_SENSITIVE ("layers-new-group",        image);
   SET_SENSITIVE ("layers-duplicate",        layer && !fs && !ac);
   SET_SENSITIVE ("layers-delete",           layer && !ac);
 
diff --git a/app/actions/layers-commands.c b/app/actions/layers-commands.c
index 527d216..2499aac 100644
--- a/app/actions/layers-commands.c
+++ b/app/actions/layers-commands.c
@@ -33,12 +33,12 @@
 #include "core/gimp.h"
 #include "core/gimpchannel-select.h"
 #include "core/gimpcontext.h"
+#include "core/gimpgrouplayer.h"
 #include "core/gimpimage.h"
 #include "core/gimpimage-merge.h"
 #include "core/gimpimage-undo.h"
 #include "core/gimpimage-undo-push.h"
 #include "core/gimpitemundo.h"
-#include "core/gimplayer.h"
 #include "core/gimplayer-floating-sel.h"
 #include "core/gimplayermask.h"
 #include "core/gimppickable.h"
@@ -361,6 +361,22 @@ layers_new_from_visible_cmd_callback (GtkAction *action,
 }
 
 void
+layers_new_group_cmd_callback (GtkAction *action,
+                               gpointer   data)
+{
+  GimpImage *image;
+  GimpLayer *layer;
+  return_if_no_image (image, data);
+
+  layer = gimp_group_layer_new (image);
+
+  gimp_image_add_layer (image, layer,
+                        GIMP_IMAGE_ACTIVE_PARENT, -1, TRUE);
+
+  gimp_image_flush (image);
+}
+
+void
 layers_select_cmd_callback (GtkAction *action,
                             gint       value,
                             gpointer   data)
diff --git a/app/actions/layers-commands.h b/app/actions/layers-commands.h
index a458a0e..9c9a019 100644
--- a/app/actions/layers-commands.h
+++ b/app/actions/layers-commands.h
@@ -31,6 +31,9 @@ void   layers_new_last_vals_cmd_callback      (GtkAction   *action,
 void   layers_new_from_visible_cmd_callback   (GtkAction   *action,
                                                gpointer     data);
 
+void   layers_new_group_cmd_callback          (GtkAction   *action,
+                                               gpointer     data);
+
 void   layers_select_cmd_callback             (GtkAction   *action,
                                                gint         value,
                                                gpointer     data);