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RE: Why mouse-1/2/3 ?
From: |
Drew Adams |
Subject: |
RE: Why mouse-1/2/3 ? |
Date: |
Tue, 28 Apr 2020 08:27:20 -0700 (PDT) |
> It comes straight from X11 terminology.
>
> 1 = left
> 2 = middle
> 3 = right
> 4 = scroll wheel up
> 5 = scroll wheel down
> 6 = scroll wheel left (yes, really)
> 7 = scroll wheel right
> 8 = 4th button (browser back)
> 9 = 5th button (browser forward)
>
> In point of fact, Emacs's first scroll-wheel support was on Windows. I
> know because I wrote it at the time. (This was in the '96-'97
> timeframe. I didn't even have a mouse with a wheel at the time. I had
> to borrow a coworker's in order to test the code.) At the time, I used
> a new event, mouse-wheel, for the mouse-wheel event. I don't know if
> X11 supported a mouse wheel at this time. Mainline (X11) emacs did not
> need to change to support a mouse wheel once X11 had support for it: it
> was just a new button number. The symbol was just a concatenation of
> "mouse-" and the button number. Later work was done to unify NTEmacs
> and mainline emacs, and the Windows-specific stuff changed to be more
> like the X11 version.
>
> One major advantage of the numbered naming system is listed above: the
> code in emacs didn't need to change in the slightest when new buttons
> were added.
Excellent. Thanks for reporting this, as the logic
behind this and as history.
- Re: Why mouse-1/2/3 ?, (continued)
Re: Why mouse-1/2/3 ?, Po Lu, 2020/04/26
Re: Why mouse-1/2/3 ?, Michael Welsh Duggan, 2020/04/27
- RE: Why mouse-1/2/3 ?,
Drew Adams <=
Re: Why mouse-1/2/3 ?, ndame, 2020/04/27
Re: Why mouse-1/2/3 ?, Andreas Schwab, 2020/04/27
Re: Why mouse-1/2/3 ?, ndame, 2020/04/27
Re: Why mouse-1/2/3 ?, Po Lu, 2020/04/27