2 /* $Id: treedragsource.ccg,v 1.4 2006/05/11 11:40:24 murrayc Exp $ */
4 /* Copyright 1998-2002 The gtkmm Development Team
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the Free
18 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <gtkmm/treepath.h>
22 #include <gtkmm/selectiondata_private.h> //For SelectionData_WithoutOwnership
23 #include <gtk/gtktreednd.h>
29 #ifdef GLIBMM_VFUNCS_ENABLED
30 //This vfunc wrapper is manually written, so that we can use a temporary instance for the SelectionData& output parameter:
32 gboolean TreeDragSource_Class::drag_data_get_vfunc_callback(GtkTreeDragSource* self, GtkTreePath* path, GtkSelectionData* selection_data)
34 CppObjectType *const obj = dynamic_cast<CppObjectType*>(
35 Glib::ObjectBase::_get_current_wrapper((GObject*)self));
37 // Non-gtkmmproc-generated custom classes implicitly call the default
38 // Glib::ObjectBase constructor, which sets is_derived_. But gtkmmproc-
39 // generated classes can use this optimisation, which avoids the unnecessary
40 // parameter conversions if there is no possibility of the virtual function
42 if(obj && obj->is_derived_())
44 #ifdef GLIBMM_EXCEPTIONS_ENABLED
45 try // Trap C++ exceptions which would normally be lost because this is a C callback.
47 #endif //GLIBMM_EXCEPTIONS_ENABLED
48 // Call the virtual member method, which derived classes might override.
49 SelectionData_WithoutOwnership temp_instance(selection_data);
50 return static_cast<int>(obj->drag_data_get_vfunc(Gtk::TreePath(path, true), temp_instance));
51 #ifdef GLIBMM_EXCEPTIONS_ENABLED
55 Glib::exception_handlers_invoke();
57 #endif //GLIBMM_EXCEPTIONS_ENABLED
61 BaseClassType *const base = static_cast<BaseClassType*>(
62 g_type_interface_peek_parent( // Get the parent interface of the interface (The original underlying C interface).
63 g_type_interface_peek(G_OBJECT_GET_CLASS(self), CppObjectType::get_type()) // Get the interface.
66 // Call the original underlying C function:
67 if(base && base->drag_data_get)
68 return (*base->drag_data_get)(self, path, selection_data);
71 typedef gboolean RType;
75 bool Gtk::TreeDragSource::drag_data_get_vfunc(const TreeModel::Path& path, SelectionData& selection_data) const
77 BaseClassType *const base = static_cast<BaseClassType*>(
78 g_type_interface_peek_parent( // Get the parent interface of the interface (The original underlying C interface).
79 g_type_interface_peek(G_OBJECT_GET_CLASS(gobject_), CppObjectType::get_type()) // Get the interface.
82 if(base && base->drag_data_get)
83 return (*base->drag_data_get)(const_cast<GtkTreeDragSource*>(gobj()),const_cast<GtkTreePath*>((path).gobj()), selection_data.gobj());
88 #endif //GLIBMM_VFUNCS_ENABLED