2003-10-29  Michael Natterer  <mitch@gimp.org>

	* app/display/gimpdisplayshell-callbacks.c
	(gimp_display_shell_tool_events): call
	tool_manager_oper_active_update() also on GDK_ENTER_NOTIFY,
	GDK_LEAVE_NOTIFY, GDK_PROXIMITY_IN and GDK_PROXIMITY_OUT so the
	active tool's state is updated when the current device
	enters/leaves the canvas area.

	* app/tools/gimpmovetool.[ch]: added GimpTool::oper_update() and
	prelight the guide which will be moved there. Prelight the guide
	only while the while the cursor is in the guide's sensitive area,
	not until another guide is selected.
	Feels better and fixes bug #125474.

	Removed "guide_disp" member from the GimpMoveTool because
	GipmTool::oper_update() is called reliably now and we don't need
	to worry about guide prelighting across different displays any
	more.

	(gimp_move_tool_cursor_update): removed guide prelighting code,
	cleaned up and simplified.

	(gimp_move_tool_button_press): never activate the tool after
	calling init_edit_selection(). Fixes more tool control warnings.

	* app/display/gimpdisplay-foreach.[ch]: removed
	gdisplays_check_valid().