2002-08-05  Zbigniew Chyla  <cyba@gnome.pl>

	* src/plugin-service.h
	(PluginServiceUICallbacks, GNM_PLUGIN_SERVICE_UI_TYPE,
	GNM_PLUGIN_SERVICE_UI, GNM_IS_PLUGIN_SERVICE_UI): New

	* src/plugin-service.c
	(PluginServiceUIClass, struct _PluginServiceUI, plugin_service_ui_init,
	plugin_service_ui_finalize, plugin_service_ui_read_xml, ui_verb_fn,
	plugin_service_ui_activate, plugin_service_ui_deactivate,
	plugin_service_ui_class_init): Implementation of the "ui" service.
	(service_types): Added "ui".

	* src/plugin-loader.h
	(struct _GnumericPluginLoaderClass):
	Added load_service_ui and load_service_ui methods.

	* src/plugin-loader.c
	(gnumeric_plugin_loader_unload_service_ui_real,
	gnumeric_plugin_loader_class_init,
	gnumeric_plugin_loader_load_service,
	gnumeric_plugin_loader_unload_service): Added support for ui service

	* plugin-loader-module.h
	(ModulePluginUIVerbInfo): New

	* src/plugin-loader-module.c
	gnumeric_plugin_loader_module_class_init
	ServiceLoaderDataUI
	gnumeric_plugin_loader_module_func_exec_verb
	gnumeric_plugin_loader_module_load_service_ui
	gnumeric_plugin_loader_module_unload_service_ui

	* src/workbook-control-gui-priv.h
	(struct _WorkbookControlGUI): Added custom_ui_components field

	* src/workbook-control-gui.h
	(register_xml_ui, unregister_xml_ui): New

	* src/workbook-control-gui.c
	(struct _CustomXmlUI, registered_xml_uis,
	wbcg_add_custom_ui, wbcg_remove_custom_ui,
	add_ui_to_workbook_controls, remove_ui_from_workbook_controls,
	register_xml_ui, unregister_xml_ui): New
	(workbook_control_gui_init): Initialize wbcg->custom_ui_components
	hash table, add all registered uis to the workbook control.
	(wbcg_finalize): Destroy wbcg->custom_ui_components