[gegl-edit] *Fixed "Delete" menu item to property disconnect and delete gegl node as well as graph-gtk node *Add

[Isaac Wagner <isaacbw src gnome org>]

commit ac5cf821c691f73ca38f4f4fbd8a6a7fe5c9ddac
Author: Isaac Wagner <isaacbw src gnome org>
Date:   Wed Aug 8 15:57:45 2012 -0400

    *Fixed "Delete" menu item to property disconnect and delete gegl node as well as graph-gtk node
    *Added functionality to "Disconnect" menu item

 gegl-edit/gegl-edit.c |   63 +++++++++++++++++++++++++++++++++++++++++++++++++
 gegl-edit/menubar.ui  |   29 +++++++++++-----------
 2 files changed, 78 insertions(+), 14 deletions(-)
---
diff --git a/gegl-edit/gegl-edit.c b/gegl-edit/gegl-edit.c
index e2f14ad..c20df30 100644
--- a/gegl-edit/gegl-edit.c
+++ b/gegl-edit/gegl-edit.c
@@ -35,6 +35,8 @@ static void load_graph(GraphGtkView *view, GeglNode *node);
 static void update_images(GraphGtkView *view);
 static void update_bg_image(GraphGtkView *view);
 
+static void gegl_node_disconnect_all_pads(GeglNode* node);
+
 //Undocumented gegl functions
 GSList		*gegl_node_get_input_pads(GeglNode*);
 GSList		*gegl_node_get_pads(GeglNode *self);
@@ -229,6 +231,31 @@ nodes_disconnected(GraphGtkView *view, GraphGtkNode *from, const gchar* output,
 
 
 //////////Gtk+ callbacks//////////
+G_MODULE_EXPORT void activated_disconnect(GtkMenuItem *menuitem, gpointer user_data)
+{
+  CallbackData *data = user_data;
+  GraphGtkView *view = g_queue_peek_head(data->view_stack);
+  gtk_widget_queue_draw(GTK_WIDGET(view));
+
+  if(view->selected_nodes)
+    {
+      GraphGtkNode *node = view->selected_nodes->data;
+
+      gegl_node_disconnect_all_pads(node->user_data);
+
+      GList *pad;
+      for(pad = graph_gtk_node_get_input_pads(node); pad != NULL; pad = pad->next)
+	{
+	  graph_gtk_pad_disconnect((GraphGtkPad*)(pad->data));
+	}
+
+      for(pad = graph_gtk_node_get_output_pads(node); pad != NULL; pad = pad->next)
+	{
+	  graph_gtk_pad_disconnect((GraphGtkPad*)(pad->data));
+	}
+    }
+}
+
 G_MODULE_EXPORT void activated_arrange(GtkMenuItem *menuitem, gpointer user_data)
 {
   CallbackData *data = user_data;
@@ -485,6 +512,18 @@ G_MODULE_EXPORT void activated_save(GtkMenuItem *menuitem, gpointer user_data)
 G_MODULE_EXPORT void activated_delete(GtkMenuItem *menuitem, gpointer user_data)
 {
   CallbackData *data = user_data;
+
+  GraphGtkView *view = g_queue_peek_head(data->view_stack);
+  GeglNode *graph = g_queue_peek_head(data->graph_stack);
+
+  GList *list;
+  for(list = view->selected_nodes; list != NULL; list = list->next)
+    {
+      GraphGtkNode *node = list->data;
+      gegl_node_disconnect_all_pads(node->user_data);
+      gegl_node_remove_child(graph, node);
+    }
+  
   graph_gtk_view_remove_selected_nodes(g_queue_peek_head(data->view_stack));
 }
 
@@ -792,3 +831,27 @@ static void load_graph(GraphGtkView *view, GeglNode *gegl)
 
   graph_gtk_view_arrange(view);
 }
+
+static void
+gegl_node_disconnect_all_pads(GeglNode* node)
+{
+  GSList* list;
+  for(list = gegl_node_get_pads(node); list != NULL; list = list->next)
+    {
+      if(gegl_pad_is_input(list->data)) //disconnect inputs
+	{
+	  gegl_node_disconnect(node, (gchar*)gegl_pad_get_name(list->data));
+	}
+      else if(gegl_pad_is_output(list->data)) //disconnect outputs
+	{
+	  GeglNode** nodes;
+	  const gchar** pads;
+	  gint num_consumers = gegl_node_get_consumers(node, gegl_pad_get_name(list->data), &nodes, &pads);
+	  gint i;
+	  for(i = 0; i < num_consumers; i++)
+	    {
+	      gegl_node_disconnect(nodes[i], pads[i]);
+	    }
+	}
+    }
+}
diff --git a/gegl-edit/menubar.ui b/gegl-edit/menubar.ui
index 7df9047..6317b89 100644
--- a/gegl-edit/menubar.ui
+++ b/gegl-edit/menubar.ui
@@ -1,6 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <!-- interface-requires gtk+ 3.0 -->
+  <object class="GtkImage" id="image6">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="xalign">0.47999998927116394</property>
+    <property name="stock">gtk-yes</property>
+  </object>
+  <object class="GtkImage" id="image7">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="xalign">0.49000000953674316</property>
+    <property name="yalign">0.49000000953674316</property>
+    <property name="stock">gtk-yes</property>
+  </object>
   <object class="GtkImage" id="image1">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
@@ -29,19 +42,6 @@
     <property name="can_focus">False</property>
     <property name="stock">gtk-cancel</property>
   </object>
-  <object class="GtkImage" id="image6">
-    <property name="visible">True</property>
-    <property name="can_focus">False</property>
-    <property name="xalign">0.47999998927116394</property>
-    <property name="stock">gtk-yes</property>
-  </object>
-  <object class="GtkImage" id="image7">
-    <property name="visible">True</property>
-    <property name="can_focus">False</property>
-    <property name="xalign">0.49000000953674316</property>
-    <property name="yalign">0.49000000953674316</property>
-    <property name="stock">gtk-yes</property>
-  </object>
   <object class="GtkImage" id="image8">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
@@ -173,12 +173,13 @@
               </object>
             </child>
             <child>
-              <object class="GtkMenuItem" id="imagemenuitem5">
+              <object class="GtkMenuItem" id="disconnect">
                 <property name="use_action_appearance">False</property>
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Disconnect</property>
                 <property name="use_underline">True</property>
+                <signal name="activate" handler="activated_disconnect" swapped="no"/>
               </object>
             </child>
             <child>