Enable mouse in emacs

emacs

;; Enable mouse support
(unless window-system
  (require 'mouse)
  (xterm-mouse-mode t)
  (global-set-key [mouse-4] '(lambda ()
                              (interactive)
                              (scroll-down 1)))
  (global-set-key [mouse-5] '(lambda ()
                              (interactive)
                              (scroll-up 1)))
  (defun track-mouse (e))
  (setq mouse-sel-mode t)
)