如何使用<escape>(有条件地)作为修饰键

问题描述

是否可以让 在某些条件存在时激活函数，但在不满足这些条件时表现得像一个修饰键?

Is it possible to have <escape> activate functions when certain conditions exist, yet behave like a modifier key when those conditions are not met?

(define-key lawlist-mode-map (kbd "<escape>") (lambda () (interactive)
  (cond
    ((ABC . . .)
      (message "You have satisfied condition ABC."))
    ((DEF . . .)
      (message "You have satisfied condition DEF."))
    (t (The <escape> key shall behave like a modifier key:  ESC- )) )))

根据 Stefan 提供的 awesome 解决方案/答案，以下说明了如何在多个条件下使用他的代码(例如，如果是 ABC，则执行 X；如果是 DEF，然后做Y).我为像我这样学习速度慢的人提供了这个例子——也就是说，我花了一些时间来理解如何正确应用代码.

---

 Based upon the awesome solution / answer provide by Stefan, the following is an illustration of how to use his code with multiple conditions (e.g., if ABC, then do X; if DEF, then do Y). I am including this example for slow-learners like myself -- i.e., it took me some time to understand how to apply the code correctly.

(global-set-key (kbd "<escape>") `(menu-item ""
  ,(lambda () (interactive)
  (cond
    ((Set forth condition ABC.)
      (message "You have satisfied condition ABC."))
    ((Set forth condition DEF.)
      (message "You have satisfied condition DEF."))))
  :filter ,(lambda (binding)
  (if (or (Set forth condition ABC.)
       (Set forth condition DEF.))
    binding))))

推荐答案

您可以执行以下操作:

(define-key lawlist-mode-map [?e]
  `(menu-item "" ,(lambda () (interactive) (message "You have satisfied condition ABC."))
              :filter ,(lambda (binding) (if (ABC ...) binding))))

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