2001-11-14  Michael Natterer  <mitch@gimp.org>

	* app/tools/tool_manager.[ch]: added
	tool_manager_button_press_active() and friends functions.

	* app/display/gimpdisplayshell-callbacks.c:
	gimp_display_shell_canvas_events(): use the functions instead of
	re-fetching the active_tool whenever it may have changed
	(which requires knowledge about the tools' implementation).
	Also moved lots of variables around.