[frogr] New function frogr_picture_add_group()

[Mario Sanchez Prada <msanchez src gnome org>]

commit ea742a342b862f6613f558ce58ce51dd70302c4e
Author: Mario Sanchez Prada <msanchez gnome org>
Date:   Sat Nov 10 03:17:20 2012 +0100

    New function frogr_picture_add_group()

 src/frogr-picture.c |   16 ++++++++++++++++
 src/frogr-picture.h |    1 +
 2 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/src/frogr-picture.c b/src/frogr-picture.c
index fb3c0c4..abe9e5a 100644
--- a/src/frogr-picture.c
+++ b/src/frogr-picture.c
@@ -1337,6 +1337,22 @@ frogr_picture_set_groups (FrogrPicture *self, GSList *groups)
 }
 
 void
+frogr_picture_add_group (FrogrPicture *self, FrogrGroup *group)
+{
+  FrogrPicturePrivate *priv = NULL;
+
+  g_return_if_fail(FROGR_IS_PICTURE(self));
+  g_return_if_fail(FROGR_IS_GROUP(group));
+
+  /* Do not add the same set twice */
+  if (frogr_picture_in_group (self, group))
+    return;
+
+  priv = FROGR_PICTURE_GET_PRIVATE (self);
+  priv->groups = g_slist_append (priv->groups, g_object_ref (group));
+}
+
+void
 frogr_picture_remove_groups (FrogrPicture *self)
 {
   g_return_if_fail(FROGR_IS_PICTURE(self));
diff --git a/src/frogr-picture.h b/src/frogr-picture.h
index b6dc881..3c85f2c 100644
--- a/src/frogr-picture.h
+++ b/src/frogr-picture.h
@@ -136,6 +136,7 @@ gboolean frogr_picture_in_photoset (FrogrPicture *self, FrogrPhotoSet *set);
 
 GSList *frogr_picture_get_groups (FrogrPicture *self);
 void frogr_picture_set_groups (FrogrPicture *self, GSList *groups);
+void frogr_picture_add_group (FrogrPicture *self, FrogrGroup *group);
 void frogr_picture_remove_groups (FrogrPicture *self);
 gboolean frogr_picture_in_group (FrogrPicture *self, FrogrGroup *group);