2004-01-19  Mark McLoughlin  <mark@skynet.ie>

	Based on a patch from Matt Keenan <matt.keenan@sun.com>

	Add some more lockdown keys:

	  /desktop/gnome/lockdown/disable_command_line
	  /apps/panel/global/disable_log_out
	  /apps/panel/global/disable_lock_screen
	  /apps/panel/globak/disable_force_quit

	Also, consolidate the per-profile and per-panel "locked_down"
	keys into a single key:

	  /apps/panel/global/locked_down

	* Makefile.am: add panel-lockdown.[ch]

	* panel-lockdown.[ch]: utilities for reading and monitoring
	the lockdown keys.

	* applet.[ch]:
	(panel_applet_toggle_locked): don't handle lock toggling
	lockdown conditions - the toggle isn't visible when locked
	down.
	(panel_applet_recreate_menu): impl. re-creating the context
	menu.
	(panel_applet_add_callback): add an "is_enabled" callback
	so we can implement this in the applets themselves.
	(panel_applet_remove_callback): kill, unused.
	(panel_applet_create_menu): check if the item is enabled.
	Don't add remove/move/lock items if locked down.
	(panel_applet_destroy): remove the lockdown notification.
	(panel_applet_register): add the lockdown notification.

	* button-widget.[ch]: implement an "activatable" property
	and grey out the button if its not activatable.

	* drawer.c: (load_drawer_applet): only have propertis menu
	item if not locked down.

	* launcher.c:
	(launcher_properties): shouldn't be reached if locked down.
	(lancher_properties_enabled), (load_launcher_applet): don't
	enable launcher properties if not locked down and
	disable_command_line isn't set.

	* menu.c:
	(show_item_menu): don't show the menu's context menu if
	locked down.
	(setup_full_menuitem), (setup_applet_drag),
	(setup_internal_applet_drag): disable dnd if locked down.
	(append_internal_applets): decide which action buttons to
	have in the menu depending on disable_command_line etc.
	(create_applets_menu): only add if the applet isn't in
	the disabled_applets list.
	(create_desktop_menu): respect disable_log_out etc.

	* panel-action-button.c: grey out any action button that should
	be disabled.

	* panel-applet-frame.c: respect changes in the lockdown keys.

	* panel-global.schemas.in: add new lockdown keys.

	* panel-menu-bar.c: respect the lockdown keys when creating
	the menus.

	* panel-menu-button.c: ditto.

	* panel-profile.[ch]: remove per-profile and per-toplevel
	locked_down keys.

	* panel-run-dialog.c: (panel_run_dialog_present): don't show
	the run dialog if locked down.

	* panel-toplevel.c: (panel_toplevel_begin_grab_op): don't
	allow moving the panel if locked down.

	* panel-toplevel.schemas.in: remove per-panel locked_down
	key.

	* panel.c: respect the locked_down key when creating the
	panel context menu.