Emacs:如何绑定(bind)两次点击的键？

Question

我正在使用 Emacs (23) 并且我正在将 C-. 组合键绑定(bind)到一个函数:

(global-set-key (kbd "C-.") 'myfunction)

是否可以绑定(bind)一个快速的“双击”键？例如，我想在快速键入 . 两次时调用函数 myfunction。

Answer 1

没有内置任何内容，但您可以使用此代码。将变量 dc-single-click-cmd 和 dc-double-click-cmd 自定义为您想要的命令。

注意:这会带来轻微的延迟，b/c 代码需要等待一点时间来确定事件是单击还是双击。

(defvar dc-single-click-cmd 'dc-example-single-click)
(defvar dc-double-click-cmd 'dc-example-double-click)
(defvar dc-click-timer nil
  "Pending single-click event.")
(defun dc-example-single-click ()
  (interactive)
  (message "A single click just happened."))
(defun dc-example-double-click ()
  (interactive)
  (message "Wait!  I meant double click."))
(defun dc-click-cmd ()
  "Either kick off a single click, or a double click."
  (interactive)
  (if dc-click-timer
      (progn
        (cancel-timer dc-click-timer)
        (setq dc-click-timer nil)
        (call-interactively dc-double-click-cmd))
    (setq dc-click-timer (run-at-time (when double-click-time 
                                            (/ 1000.0 double-click-time))
                                      nil
                                      'dc-call-single-click))))
(defun dc-call-single-click ()
  "spawn the single click"
  (setq dc-click-timer nil)
  (call-interactively dc-single-click-cmd))