Added a collection argument to this to set the GalViewCollection.

2001-01-17  Christopher James Lahey  <clahey@helixcode.com>

	* gal-define-views-dialog.c, gal-define-views-dialog.h: Added a
	collection argument to this to set the GalViewCollection.
	Connected up the modify, delete, and copy buttons.  Documented.

	* gal-define-views-model.c, gal-define-views-model.h: Added
	gal_define_views_model_get_view,
	gal_define_views_model_delete_view, and
	gal_define_views_model_copy_view methods.  Documented.

	* gal-view-collection.c: Documented.

	* gal-view-etable.c, gal-view-etable.h: Documented.  Implemented
	edit and clone methods of GalView.  Initialized state to a
	non-NULL value.  Added a name parameter to gal_view_etable_new.

	* gal-view-factory-etable.c: Documented.  Added the name argument
	to gal_view_etable_new.

	* gal-view-factory.c: Fixed the g_return_val_if_fails to check for
	GalViewFactory as the type instead of GalView.

	* gal-view.c, gal-view.h: Added the clone method.

svn path=/trunk/; revision=7599

11 files changed, 315 insertions, 36 deletions

diff --git a/widgets/menus/gal-define-views-dialog.c b/widgets/menus/gal-define-views-dialog.c
index f92f1520c7..b1e5d6aba6 100644
--- a/widgets/menus/gal-define-views-dialog.c
+++ b/widgets/menus/gal-define-views-dialog.c
@@ -38,6 +38,7 @@ static GnomeDialogClass *parent_class = NULL;
 /* The arguments we take */
 enum {
 	ARG_0,
+	ARG_COLLECTION,
 };
 
 typedef struct {
@@ -82,10 +83,13 @@ gal_define_views_dialog_class_init (GalDefineViewsDialogClass *klass)
 	object_class->set_arg = gal_define_views_dialog_set_arg;
 	object_class->get_arg = gal_define_views_dialog_get_arg;
 	object_class->destroy = gal_define_views_dialog_destroy;
+
+	gtk_object_add_arg_type("GalDefineViewsDialog::collection", GTK_TYPE_OBJECT,
+				GTK_ARG_READWRITE, ARG_COLLECTION);
 }
 
 /* ETable creation */
-#define SPEC "<ETableSpecification cursor-mode=\"line\" draw-grid=\"true\">" \
+#define SPEC "<ETableSpecification cursor-mode=\"line\" draw-grid=\"true\" selection-mode=\"single\">" \
 	     "<ETableColumn model_col= \"0\" _title=\"Name\" expansion=\"1.0\" minimum_width=\"18\" resizable=\"true\" cell=\"string\" compare=\"string\"/>" \
              "<ETableState> <column source=\"0\"/> <grouping> </grouping> </ETableState>" \
 	     "</ETableSpecification>"
@@ -139,6 +143,62 @@ gdvd_button_new_callback(GtkWidget *widget, GalDefineViewsDialog *dialog)
 }
 
 static void
+gdvd_button_modify_callback(GtkWidget *widget, GalDefineViewsDialog *dialog)
+{
+	int row;
+	GtkWidget *scrolled;
+	ETable *etable;
+
+	scrolled = glade_xml_get_widget(dialog->gui, "custom-table");
+	etable = e_table_scrolled_get_table(E_TABLE_SCROLLED(scrolled));
+	row = e_table_get_cursor_row (E_TABLE(etable));
+
+	if (row != -1) {
+		GalView *view;
+		view = gal_define_views_model_get_view(GAL_DEFINE_VIEWS_MODEL(dialog->model),
+						       row);
+		gal_view_edit(view);
+	}
+
+}
+
+static void
+gdvd_button_delete_callback(GtkWidget *widget, GalDefineViewsDialog *dialog)
+{
+	int row;
+	GtkWidget *scrolled;
+	ETable *etable;
+
+	scrolled = glade_xml_get_widget(dialog->gui, "custom-table");
+	etable = e_table_scrolled_get_table(E_TABLE_SCROLLED(scrolled));
+	row = e_table_get_cursor_row (E_TABLE(etable));
+
+	if (row != -1) {
+		gal_define_views_model_delete_view(GAL_DEFINE_VIEWS_MODEL(dialog->model),
+						   row);
+	}
+
+}
+
+static void
+gdvd_button_copy_callback(GtkWidget *widget, GalDefineViewsDialog *dialog)
+{
+	int row;
+	GtkWidget *scrolled;
+	ETable *etable;
+
+	scrolled = glade_xml_get_widget(dialog->gui, "custom-table");
+	etable = e_table_scrolled_get_table(E_TABLE_SCROLLED(scrolled));
+	row = e_table_get_cursor_row (E_TABLE(etable));
+
+	if (row != -1) {
+		gal_define_views_model_copy_view(GAL_DEFINE_VIEWS_MODEL(dialog->model),
+						 row);
+	}
+
+}
+
+static void
 gdvd_connect_signal(GalDefineViewsDialog *dialog, char *widget_name, char *signal, GtkSignalFunc handler)
 {
 	GtkWidget *widget;
@@ -173,7 +233,10 @@ gal_define_views_dialog_init (GalDefineViewsDialog *dialog)
 				    GNOME_STOCK_BUTTON_CANCEL,
 				    NULL);
 
-	gdvd_connect_signal(dialog, "button-new", "clicked", GTK_SIGNAL_FUNC(gdvd_button_new_callback));
+	gdvd_connect_signal(dialog, "button-new",    "clicked", GTK_SIGNAL_FUNC(gdvd_button_new_callback));
+	gdvd_connect_signal(dialog, "button-modify", "clicked", GTK_SIGNAL_FUNC(gdvd_button_modify_callback));
+	gdvd_connect_signal(dialog, "button-delete", "clicked", GTK_SIGNAL_FUNC(gdvd_button_delete_callback));
+	gdvd_connect_signal(dialog, "button-copy",   "clicked", GTK_SIGNAL_FUNC(gdvd_button_copy_callback));
 
 	dialog->model = NULL;
 	etable = glade_xml_get_widget(dialog->gui, "custom-table");
@@ -187,10 +250,17 @@ gal_define_views_dialog_init (GalDefineViewsDialog *dialog)
 static void
 gal_define_views_dialog_destroy (GtkObject *object) {
 	GalDefineViewsDialog *gal_define_views_dialog = GAL_DEFINE_VIEWS_DIALOG(object);
-	
+
 	gtk_object_unref(GTK_OBJECT(gal_define_views_dialog->gui));
 }
 
+/**
+ * gal_define_views_dialog_new
+ *
+ * Returns a new dialog for defining views.
+ *
+ * Returns: The GalDefineViewsDialog.
+ */
 GtkWidget*
 gal_define_views_dialog_new (void)
 {
@@ -201,11 +271,18 @@ gal_define_views_dialog_new (void)
 static void
 gal_define_views_dialog_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
 {
-	GalDefineViewsDialog *editor;
+	GalDefineViewsDialog *dialog;
 
-	editor = GAL_DEFINE_VIEWS_DIALOG (o);
+	dialog = GAL_DEFINE_VIEWS_DIALOG (o);
 	
 	switch (arg_id){
+	case ARG_COLLECTION:
+		if (GTK_VALUE_OBJECT(*arg))
+			dialog->collection = GAL_VIEW_COLLECTION(GTK_VALUE_OBJECT(*arg));
+		else
+			dialog->collection = NULL;
+		break;
+
 	default:
 		return;
 	}
@@ -214,11 +291,18 @@ gal_define_views_dialog_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
 static void
 gal_define_views_dialog_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
 {
-	GalDefineViewsDialog *gal_define_views_dialog;
+	GalDefineViewsDialog *dialog;
 
-	gal_define_views_dialog = GAL_DEFINE_VIEWS_DIALOG (object);
+	dialog = GAL_DEFINE_VIEWS_DIALOG (object);
 
 	switch (arg_id) {
+	case ARG_COLLECTION:
+		if (dialog->collection)
+			GTK_VALUE_OBJECT(*arg) = GTK_OBJECT(dialog->collection);
+		else
+			GTK_VALUE_OBJECT(*arg) = NULL;
+		break;
+
 	default:
 		arg->type = GTK_TYPE_INVALID;
 		break;
diff --git a/widgets/menus/gal-define-views-dialog.h b/widgets/menus/gal-define-views-dialog.h
index 11daec5897..b4ac80c492 100644
--- a/widgets/menus/gal-define-views-dialog.h
+++ b/widgets/menus/gal-define-views-dialog.h
@@ -51,7 +51,7 @@ typedef struct _GalDefineViewsDialogClass  GalDefineViewsDialogClass;
 struct _GalDefineViewsDialog
 {
 	GnomeDialog parent;
-	
+
 	/* item specific fields */
 	GladeXML *gui;
 	ETableModel *model;
@@ -67,8 +67,6 @@ struct _GalDefineViewsDialogClass
 GtkWidget               *gal_define_views_dialog_new          (void);
 GtkType                  gal_define_views_dialog_get_type     (void);
 
-void                     gal_define_views_dialog_add_section  (GalDefineViewsDialog      *gal_define_views_dialog);
-
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
diff --git a/widgets/menus/gal-define-views-model.c b/widgets/menus/gal-define-views-model.c
index 79fbf56c4a..4f988c09bb 100644
--- a/widgets/menus/gal-define-views-model.c
+++ b/widgets/menus/gal-define-views-model.c
@@ -130,6 +130,13 @@ gdvm_value_to_string (ETableModel *etc, int col, const void *value)
 	return g_strdup(value);
 }
 
+/**
+ * gal_define_views_model_append
+ * @model: The model to add to.
+ * @view: The view to add.
+ *
+ * Adds the given view to the gal define views model.
+ */
 void
 gal_define_views_model_append (GalDefineViewsModel *model,
 			       GalView             *view)
@@ -157,7 +164,7 @@ gal_define_views_model_class_init (GtkObjectClass *object_class)
 
 	gtk_object_add_arg_type ("GalDefineViewsModel::editable", GTK_TYPE_BOOL,
 				 GTK_ARG_READWRITE, ARG_EDITABLE);
-	
+
 	model_class->column_count     = gdvm_col_count;
 	model_class->row_count        = gdvm_row_count;
 	model_class->value_at         = gdvm_value_at;
@@ -187,7 +194,7 @@ gal_define_views_model_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
 	GalDefineViewsModel *model;
 
 	model = GAL_DEFINE_VIEWS_MODEL (o);
-	
+
 	switch (arg_id){
 	case ARG_EDITABLE:
 		model->editable = GTK_VALUE_BOOL (*arg);
@@ -235,12 +242,78 @@ gal_define_views_model_get_type (void)
 	return type;
 }
 
+/**
+ * gal_define_views_model_new
+ *
+ * Returns a new define views model.  This is a list of views as an
+ * ETable for use in the GalDefineViewsDialog.
+ *
+ * Returns: The new GalDefineViewsModel.
+ */
 ETableModel *
 gal_define_views_model_new (void)
 {
 	GalDefineViewsModel *et;
 
 	et = gtk_type_new (gal_define_views_model_get_type ());
-	
+
 	return E_TABLE_MODEL(et);
 }
+
+/**
+ * gal_define_views_model_get_view:
+ * @model: The GalDefineViewsModel.
+ * @n: Which view to get.
+ *
+ * Gets the nth view.
+ *
+ * Returns: The view.
+ */
+GalView *
+gal_define_views_model_get_view (GalDefineViewsModel *model,
+				 int n)
+{
+	return model->data[n];
+}
+
+/**
+ * gal_define_views_model_delete_view:
+ * @model: The GalDefineViewsModel.
+ * @n: Which view to delete.
+ *
+ * Deletes the nth view.
+ */
+void
+gal_define_views_model_delete_view (GalDefineViewsModel *model,
+				    int n)
+{
+	e_table_model_pre_change(E_TABLE_MODEL(model));
+	gtk_object_unref(GTK_OBJECT(model->data[n]));
+	model->data_count --;
+	memmove(model->data + n, model->data + n + 1, (model->data_count - n) * sizeof(*model->data));
+	model->data = g_renew(GalView *, model->data, model->data_count);
+	e_table_model_row_deleted(E_TABLE_MODEL(model), n);
+}
+
+/**
+ * gal_define_views_model_copy_view:
+ * @model: The GalDefineViewsModel.
+ * @n: Which view to copy.
+ *
+ * Copys the nth view.
+ */
+void
+gal_define_views_model_copy_view (GalDefineViewsModel *model,
+				  int n)
+{
+	ETableModel *etm = E_TABLE_MODEL(model);
+	GalView *view;
+
+	view = gal_view_clone (model->data[n]);
+
+	e_table_model_pre_change(etm);
+	model->data = g_renew(GalView *, model->data, model->data_count + 1);
+	model->data[model->data_count] = view;
+	model->data_count++;
+	e_table_model_row_inserted(etm, model->data_count - 1);
+}
diff --git a/widgets/menus/gal-define-views-model.h b/widgets/menus/gal-define-views-model.h
index cdd729eef0..4f1115d66a 100644
--- a/widgets/menus/gal-define-views-model.h
+++ b/widgets/menus/gal-define-views-model.h
@@ -34,10 +34,16 @@ typedef struct {
 } GalDefineViewsModelClass;
 
 
-GtkType      gal_define_views_model_get_type  (void);
-ETableModel *gal_define_views_model_new       (void);
-
-void         gal_define_views_model_append    (GalDefineViewsModel *model,
-					       GalView             *view);
+GtkType      gal_define_views_model_get_type     (void);
+ETableModel *gal_define_views_model_new          (void);
+
+void         gal_define_views_model_append       (GalDefineViewsModel *model,
+						  GalView             *view);
+GalView     *gal_define_views_model_get_view     (GalDefineViewsModel *model,
+						  int                  i);
+void         gal_define_views_model_delete_view  (GalDefineViewsModel *model,
+						  int                  i);
+void         gal_define_views_model_copy_view    (GalDefineViewsModel *model,
+						  int                  i);
 
 #endif /* _GAL_DEFINE_VIEWS_MODEL_H_ */
diff --git a/widgets/menus/gal-view-collection.c b/widgets/menus/gal-view-collection.c
index 5b625c44f4..30652f064f 100644
--- a/widgets/menus/gal-view-collection.c
+++ b/widgets/menus/gal-view-collection.c
@@ -83,6 +83,10 @@ gal_view_collection_init (GalViewCollection *collection)
 	collection->factory_list = NULL;
 }
 
+/**
+ * gal_view_collection_get_type:
+ *
+ */
 guint
 gal_view_collection_get_type (void)
 {
@@ -108,20 +112,44 @@ gal_view_collection_get_type (void)
   return type;
 }
 
-GalViewCollection *gal_view_collection_new                      (void)
+/**
+ * gal_view_collection_new:
+ *
+ * A collection of views and view factories.
+ */
+GalViewCollection *
+gal_view_collection_new                      (void)
 {
 	return gtk_type_new(gal_view_collection_get_type());
 }
 
-/* Set up the view collection */
-void               gal_view_collection_set_storage_directories  (GalViewCollection *collection,
-								 char              *system_dir,
-								 char              *local_dir)
+/**
+ * gal_view_collection_set_storage_directories
+ * @collection: The view collection to initialize
+ * @system_dir: The location of the system built in views
+ * @local_dir: The location to store the users set up views
+ *
+ * Sets up the GalViewCollection.
+ */
+void
+gal_view_collection_set_storage_directories  (GalViewCollection *collection,
+					      char              *system_dir,
+					      char              *local_dir)
 {
 }
 
-void               gal_view_collection_add_factory              (GalViewCollection *collection,
-								 GalViewFactory    *factory)
+/**
+ * gal_view_collection_add_factory
+ * @collection: The view collection to add a factory to
+ * @factory: The factory to add
+ *
+ * Adds the given factory to this collection.  This list is used both
+ * when loading views from their xml description as well as when the
+ * user tries to create a new view.
+ */
+void
+gal_view_collection_add_factory              (GalViewCollection *collection,
+					      GalViewFactory    *factory)
 {
 	gtk_object_ref(GTK_OBJECT(factory));
 	collection->factory_list = g_list_prepend(collection->factory_list, factory);
diff --git a/widgets/menus/gal-view-etable.c b/widgets/menus/gal-view-etable.c
index d990e29ff9..b748f66952 100644
--- a/widgets/menus/gal-view-etable.c
+++ b/widgets/menus/gal-view-etable.c
@@ -9,6 +9,7 @@
  */
 #include <config.h>
 #include "gal-view-etable.h"
+#include <gal/e-table/e-table-config.h>
 
 #define PARENT_TYPE gal_view_get_type ()
 
@@ -17,7 +18,10 @@ static GalViewClass *gal_view_etable_parent_class;
 static void
 gal_view_etable_edit            (GalView *view)
 {
-
+	GalViewEtable *etable_view = GAL_VIEW_ETABLE(view);
+	e_table_config_new(etable_view->title,
+			   etable_view->spec,
+			   etable_view->state);
 }
 
 static void  
@@ -40,6 +44,23 @@ gal_view_etable_get_title       (GalView *view)
 	return GAL_VIEW_ETABLE(view)->title;
 }
 
+static GalView *
+gal_view_etable_clone       (GalView *view)
+{
+	GalViewEtable *gve, *new;
+
+	gve = GAL_VIEW_ETABLE(view);
+
+	new        = gtk_type_new (gal_view_etable_get_type ());
+	new->spec  = gve->spec;
+	new->title = g_strdup (gve->title);
+	new->state = e_table_state_duplicate(gve->state);
+
+	gtk_object_ref(GTK_OBJECT(new->spec));
+
+	return GAL_VIEW(new);
+}
+
 static void
 gal_view_etable_destroy         (GtkObject *object)
 {
@@ -61,6 +82,7 @@ gal_view_etable_class_init      (GtkObjectClass *object_class)
 	gal_view_class->load_from_node = gal_view_etable_load_from_node;
 	gal_view_class->save_to_node   = gal_view_etable_save_to_node  ;
 	gal_view_class->get_title      = gal_view_etable_get_title     ;
+	gal_view_class->clone          = gal_view_etable_clone         ;
 
 	object_class->destroy          = gal_view_etable_destroy       ;
 }
@@ -69,23 +91,47 @@ static void
 gal_view_etable_init      (GalViewEtable *gve)
 {
 	gve->spec  = NULL;
-	gve->state = NULL;
+	gve->state = e_table_state_new();
 	gve->title = NULL;
 }
 
+/**
+ * gal_view_etable_new
+ * @spec: The ETableSpecification that this view will be based upon.
+ * @title: The name of the new view.
+ *
+ * Returns a new GalViewEtable.  This is primarily for use by
+ * GalViewFactoryEtable.
+ *
+ * Returns: The new GalViewEtable.
+ */
 GalView *
-gal_view_etable_new (ETableSpecification *spec)
+gal_view_etable_new (ETableSpecification *spec,
+		     const gchar *title)
 {
-	return gal_view_etable_construct (gtk_type_new (gal_view_etable_get_type ()), spec);
+	return gal_view_etable_construct (gtk_type_new (gal_view_etable_get_type ()), spec, title);
 }
 
+/**
+ * gal_view_etable_construct
+ * @view: The view to construct.
+ * @spec: The ETableSpecification that this view will be based upon.
+ * @title: The name of the new view.
+ *
+ * constructs the GalViewEtable.  To be used by subclasses and
+ * language bindings.
+ *
+ * Returns: The GalViewEtable.
+ */
 GalView *
 gal_view_etable_construct  (GalViewEtable *view,
-			    ETableSpecification *spec)
+			    ETableSpecification *spec,
+			    const gchar *title)
 {
 	if (spec)
 		gtk_object_ref(GTK_OBJECT(spec));
 	view->spec = spec;
+	view->title = g_strdup(title);
 	return GAL_VIEW(view);
 }
 
diff --git a/widgets/menus/gal-view-etable.h b/widgets/menus/gal-view-etable.h
index 5744da52ec..98a1ddc861 100644
--- a/widgets/menus/gal-view-etable.h
+++ b/widgets/menus/gal-view-etable.h
@@ -27,8 +27,10 @@ typedef struct {
 
 /* Standard functions */
 GtkType  gal_view_etable_get_type   (void);
-GalView *gal_view_etable_new        (ETableSpecification *spec);
+GalView *gal_view_etable_new        (ETableSpecification *spec,
+				     const gchar         *title);
 GalView *gal_view_etable_construct  (GalViewEtable       *view,
-				     ETableSpecification *spec);
+				     ETableSpecification *spec,
+				     const gchar         *title);
 
 #endif /* _GAL_VIEW_ETABLE_H_ */
diff --git a/widgets/menus/gal-view-factory-etable.c b/widgets/menus/gal-view-factory-etable.c
index 918838050a..0a013c71e6 100644
--- a/widgets/menus/gal-view-factory-etable.c
+++ b/widgets/menus/gal-view-factory-etable.c
@@ -29,7 +29,7 @@ static GalView *
 gal_view_factory_etable_new_view        (GalViewFactory *factory,
 					 const char     *name)
 {
-	return gal_view_etable_new(GAL_VIEW_FACTORY_ETABLE(factory)->spec);
+	return gal_view_etable_new(GAL_VIEW_FACTORY_ETABLE(factory)->spec, name);
 }
 
 static void
@@ -59,12 +59,31 @@ gal_view_factory_etable_init            (GalViewFactoryEtable *factory)
 	factory->spec = NULL;
 }
 
+/**
+ * gal_view_etable_new
+ * @spec: The spec to create GalViewEtables based upon.
+ *
+ * A new GalViewFactory for creating ETable views.  Create one of
+ * these and pass it to GalViewCollection for use.
+ *
+ * Returns: The new GalViewFactoryEtable.
+ */
 GalViewFactory *
 gal_view_factory_etable_new        (ETableSpecification  *spec)
 {
 	return gal_view_factory_etable_construct (gtk_type_new (gal_view_factory_etable_get_type ()), spec);
 }
 
+/**
+ * gal_view_etable_construct
+ * @factory: The factory to construct
+ * @spec: The spec to create GalViewEtables based upon.
+ *
+ * constructs the GalViewFactoryEtable.  To be used by subclasses and
+ * language bindings.
+ *
+ * Returns: The GalViewFactoryEtable.
+ */
 GalViewFactory *
 gal_view_factory_etable_construct  (GalViewFactoryEtable *factory,
 				    ETableSpecification  *spec)
diff --git a/widgets/menus/gal-view-factory.c b/widgets/menus/gal-view-factory.c
index 1ba3e061bf..32eb7ad016 100644
--- a/widgets/menus/gal-view-factory.c
+++ b/widgets/menus/gal-view-factory.c
@@ -30,7 +30,7 @@ const char *
 gal_view_factory_get_title       (GalViewFactory *factory)
 {
 	g_return_val_if_fail (factory != NULL, 0);
-	g_return_val_if_fail (GAL_IS_VIEW (factory), 0);
+	g_return_val_if_fail (GAL_IS_VIEW_FACTORY (factory), 0);
 
 	if (GVF_CLASS (factory)->get_title)
 		return GVF_CLASS (factory)->get_title (factory);
@@ -50,7 +50,7 @@ gal_view_factory_new_view        (GalViewFactory *factory,
 				  const char     *name)
 {
 	g_return_val_if_fail (factory != NULL, 0);
-	g_return_val_if_fail (GAL_IS_VIEW (factory), 0);
+	g_return_val_if_fail (GAL_IS_VIEW_FACTORY (factory), 0);
 
 	if (GVF_CLASS (factory)->new_view)
 		return GVF_CLASS (factory)->new_view (factory, name);
diff --git a/widgets/menus/gal-view.c b/widgets/menus/gal-view.c
index 1ff9ffab16..a9a57b5443 100644
--- a/widgets/menus/gal-view.c
+++ b/widgets/menus/gal-view.c
@@ -85,16 +85,35 @@ gal_view_get_title       (GalView *view)
 		return NULL;
 }
 
+/**
+ * gal_view_clone
+ * @view: The view to clone.
+ *
+ * Returns: The clone.
+ */
+GalView *
+gal_view_clone       (GalView *view)
+{
+	g_return_val_if_fail (view != NULL, NULL);
+	g_return_val_if_fail (GAL_IS_VIEW (view), NULL);
+
+	if (GV_CLASS (view)->clone)
+		return GV_CLASS (view)->clone (view);
+	else
+		return NULL;
+}
+
 static void
 gal_view_class_init      (GtkObjectClass *object_class)
 {
-	GalViewClass *klass = GAL_VIEW_CLASS(object_class);
+	GalViewClass *klass   = GAL_VIEW_CLASS(object_class);
 	gal_view_parent_class = gtk_type_class (PARENT_TYPE);
 	
 	klass->edit           = NULL;     
 	klass->load_from_node = NULL;     
 	klass->save_to_node   = NULL;     
 	klass->get_title      = NULL;     
+	klass->clone          = NULL;
 }
 
 GtkType
diff --git a/widgets/menus/gal-view.h b/widgets/menus/gal-view.h
index 7894e043dc..7860f08da7 100644
--- a/widgets/menus/gal-view.h
+++ b/widgets/menus/gal-view.h
@@ -27,6 +27,7 @@ typedef struct {
 	void        (*save_to_node)   (GalView *view,
 				       xmlNode *parent);
 	const char *(*get_title)      (GalView *view);
+	GalView    *(*clone)          (GalView *view);
 } GalViewClass;
 
 /* Standard functions */
@@ -44,5 +45,8 @@ void        gal_view_save_to_node    (GalView *view,
 /* Query functions */
 const char *gal_view_get_title       (GalView *view);
 
+/* Cloning the view */
+GalView    *gal_view_clone           (GalView *view);
+
 
 #endif /* _GAL_VIEW_H_ */