+ (while
+ (progn
+ (setq key (read-key-sequence "Describe the following key, mouse click, or menu item: "))
+ (and (vectorp key)
+ (consp (aref key 0))
+ (symbolp (car (aref key 0)))
+ (string-match "\\(mouse\\|down\\|click\\|drag\\)"
+ (symbol-name (car (aref key 0))))
+ (not (sit-for (/ double-click-time 1000.0) t)))))