2002-12-04  Mark McLoughlin  <mark@skynet.ie>

	Re-write the background rendering code to be
	less buggy and to be less resource hungry for
	opaque backgrounds. Code is a lot clearer now.

	* Makefile.am: add panel-background.[ch] to the
	build.

	* panel-background.[ch]: re-written implementation
	of the background rendering. Less resource hungry
	for non-alpha backgrounds and colours. And a lot,
	lot less buggy.

	* launcher.c: include egg-screen-exec.h to fix
	warning.

	* menu.c: (create_new_panel): initialise colour
	correctly.

	* panel-applet-frame.c:
	(panel_applet_frame_get_background_string): move the
	implementation of this to panel-background.c.
	(panel_applet_frame_change_background),
	(panel_applet_frame_construct_moniker): upd.

	* panel-background-monitor.[ch]:
	(panel_background_monitor_finalize): don't unref
	NULL references.
	(panel_background_monitor_get): ref the return
	value so we can destroy it when not needed.
	(panel_background_monitor_setup_pixmap): don't leak
	the property data.
	(panel_background_monitor_get_widget_background): kill.

	* panel-types.h: rename PanelBackType to PanelBackgroundType
	and PANEL_BACK_PIXMAP to PANEL_BACK_IMAGE.

	* panel-widget.[ch]: Kill all the old background code and:
	(panel_widget_style_set), (panel_widget_state_changed):
	set the theme defaults on the PanelBackground when they change.
	(toplevel_configure_event): change the desktop background
	region when the toplevel is moved or resized.
	(panel_widget_realize), (panel_widget_unrealize): impl

	* aligned-widget.[ch], basep-widget.[ch], border-widget.[ch],
	  drawer-widget.[ch], edge-widget.[ch], floating-widget.[ch],
	  panel-config.[ch], panel-util.c, panel.c, sliding-widget.[ch]:
	Mucho minor and boring updates for changes in the various
	background structs and enums.