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factory.h

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00001 /* Copyright 2003 libpanelappletmm Development Team
00002  *
00003  * This library is free software; you can redistribute it and/or
00004  * modify it under the terms of the GNU Library General Public
00005  * License as published by the Free Software Foundation; either
00006  * version 2 of the License, or (at your option) any later version.
00007  *
00008  * This library is distributed in the hope that it will be useful,
00009  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00010  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011  * Library General Public License for more details.
00012  *
00013  * You should have received a copy of the GNU Library General Public
00014  * License along with this library; if not, write to the Free
00015  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00016  */
00017 
00018 
00019 #ifndef _LIBPANELAPPLETMM_FACTORY_H
00020 #define _LIBPANELAPPLETMM_FACTORY_H
00021 
00022 #include <glibmm.h>
00023 #include <libpanelappletmm/applet.h>
00024 
00025 namespace Gnome
00026 {
00027 
00028 namespace Panel
00029 {
00030 
00031 typedef sigc::slot<bool, PanelApplet*, const Glib::ustring&> SlotFactory;
00032 
00033 namespace
00034 {
00035 
00036 //SignalProxy_Factory
00037 //This Signal Proxy allows the C++ coder to specify a SigC::Slot instead of a static function
00038 class SignalProxy_Factory
00039 {
00040 public:
00041   typedef Gnome::Panel::SlotFactory SlotType;
00042 
00043   SignalProxy_Factory(const SlotType& slot);
00044   ~SignalProxy_Factory();
00045   
00046   static gboolean c_callback(PanelApplet* applet, const gchar* iid, void* data);
00047 
00048   SlotType slot_;
00049 };
00050 
00051 SignalProxy_Factory::SignalProxy_Factory(const SlotType& slot) : slot_(slot)
00052 {
00053 }
00054 
00055 SignalProxy_Factory::~SignalProxy_Factory()
00056 {}
00057 
00058 gboolean SignalProxy_Factory::c_callback(PanelApplet* applet, const gchar* iid, void* data)
00059 {
00060   SignalProxy_Factory *const self = (SignalProxy_Factory*)(data);
00061 
00062   const Glib::ustring sp_iid = Glib::convert_const_gchar_ptr_to_ustring(iid);
00063   
00064   // Just pass the PanelApplet* because the developer will need to wrap
00065   // it with their own class that derives from Gnome::Panel::Applet.
00066   return (self->slot_)(applet, sp_iid);
00067 }
00068 
00069 template<class DerivedApplet>
00070 bool applet_factory_callback(PanelApplet* panel_applet, const Glib::ustring& iid)
00071 {
00072   //TODO: When will this C++ wrapper be deleted?
00073   //When the C object is deleted? When is that? murrayc
00074   DerivedApplet* applet = Gtk::manage(new DerivedApplet(panel_applet));
00075 
00076   applet->show();
00077 
00078   return true;
00079 }
00080 
00081 } // anonymous namespace
00082 
00083 template<class DerivedApplet>
00084 int factory_main(const Glib::ustring& iid);
00085 
00086 template<class DerivedApplet>
00087 Bonobo_Unknown shlib_factory(const Glib::ustring& iid, PortableServer_POA poa, void* impl_ptr, const SlotFactory& slot, CORBA_Environment* ev);
00088 
00089 int factory_main_closure(const Glib::ustring& iid, GClosure *closure);
00090 
00091 Bonobo_Unknown shlib_factory_closure(const Glib::ustring& iid, PortableServer_POA poa, void* impl_ptr, GClosure* closure, CORBA_Environment* ev);
00092 
00093 
00094 template<class DerivedApplet>
00095 int factory_main(const Glib::ustring& iid)
00096 {
00097   SignalProxy_Factory proxy( sigc::ptr_fun(&applet_factory_callback<DerivedApplet>) );
00098 
00099   return panel_applet_factory_main( iid.c_str(), Applet::get_type(), SignalProxy_Factory::c_callback, &proxy);
00100 }
00101 
00102 template<class DerivedApplet>
00103 Bonobo_Unknown shlib_factory(const Glib::ustring& iid, PortableServer_POA poa, void* impl_ptr, const SlotFactory& slot, CORBA_Environment* ev)
00104 {
00105   SignalProxy_Factory proxy( sigc::ptr_fun(&applet_factory_callback<DerivedApplet>) );
00106 
00107   return panel_applet_shlib_factory( iid.c_str(), Applet::get_type(), poa, impl_ptr, SignalProxy_Factory::c_callback, &proxy, ev);
00108 }
00109 
00110 } // namespace Panel
00111 } // namespace Gnome
00112 
00113 #endif /* _LIBPANELAPPLETMM_FACTORY_H */

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