bug#47162: Mouse Wheel Won't Work When Emacs Built without Any Window System

[张强]

Dear All,

I found the mouse wheel can't work when I build emacs without any window system, after some investigation I found below code snippet in file "lisp/loadup.el".

(if (fboundp 'x-create-frame)

    ;; Do it after loading term/foo-win.el since the value of the

    ;; mouse-wheel-*-event vars depends on those files being loaded or not.

    (load "mwheel"))

It is strange to me, because the mouse click work well no matter left/right mouse click or double click, but the mouse wheel will not, from comments in above code snippet, it seems the package "mwheel" need to be loaded after "xxx-win.el" for the initialization of variables "mouse-wheel-*-event".

After add below code snippet to my emacs configuration file, I found the package "mwheel" can work well when the emacs built without any window system.

  (load "mwheel")

  (mouse-wheel-mode t)

so I want to know whether the package "mwheel" should be loaded without precondition?

The window system is useless for me, and most of the time the lib needed by window system is not available, so I want to build emacs with configuration options like "--without-x / --without-ns" to reduce the dependent libraries as more as possible. But mouse wheel is important to me, it is very useful especially I discuss problem with my colleagues and they want scroll my emacs screen temporarily.

Thanks.

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Best Regards,

Qiang Zhang