Re: map 2nd 3rd mouse buttons?

[mallum <breakfast@10.am>]

Attached is a quick hack for X, that allows you to hold a key down 
( option key in my case ) and click the mouse for a right click, double
tap and hold the key, then click mouse for a middle click.

You may need to change the value 115 in the source for your keyboard -
find keycode with xev.

Probably not a good idea to release the key before the mouse button.

Worked more natural for me than reaching up for function keys. 

  -- mallum

on Tue, Mar 26, 2002 at 07:51:23PM -0500, B.C.J.O wrote:
> On Tue, 19 Mar 2002, ragnar wrote:
> 
> > I'm using a powerbook 3400c which of course has a one button touch pad.
> > Does anyone know how to map mouse events generated by a middle and right
> > button click of a  typical 3-button mouse to either a keyboard key or
> > combo of key and mouse click?
> 
> This was one of my first questions after migrating my lombard to debian..
> the solution is painless. Add the following lines to /etc/sysctl.conf
> 
> dev.mac_hid.mouse_button2_keycode = 87
> dev.mac_hid.mouse_button3_keycode = 88
> dev.mac_hid.mouse_button_emulation = 1
> 
> which binds the middle and right mouse buttons to f11 and f12
> respectively, after you run 'sysctl -p' which will apply the new lines
> from sysctl.conf
> 
> If you don't like f11 and f12, you'll have to look up the keycodes for the
> other keys. =)
> 
> Brian
> fade@etc.etc.etc.
> 
> "You can't depend on your judgement when your imagination
> is out of focus."			-- Mark Twain
> 
> 
> -- 
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> with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org

/* XMonobut - Modify mouse button behaviour with keyboard.

   o Usage

   Hold selected key ( KEYSYM_TO_GRAB ) down and click mouse button for
   right click.
   Quickly press selected key once, then again holding down for middle click.

   o Compiling
   
   gcc -Wall XMonobut.c -o xmonobut -L/usr/X11R6/lib -lX11

   
   Copyright 2002 Matthew Allum <mallum@handhelds.org>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xmd.h>
#include <X11/keysym.h>
#include <X11/cursorfont.h>

#define KEYSYM_TO_GRAB 115 /* get from xev or keysym.h  */
#define DCLICK_TIME    200

int main(int argc, char **argv)
{
   Display *dpy;
   char *dpy_name = NULL;
   Window root;
   XEvent ev;
   Cursor right_curs, middle_curs, orig_curs;
   Time lasttime = 0;
   unsigned char map[5];
   
   if ((dpy = XOpenDisplay(dpy_name)) == NULL) {
      fprintf(stderr, "can't open display! check your DISPLAY variable.\n");
      exit(1);
   }
   root = RootWindow(dpy, DefaultScreen(dpy));

   /* see http://tronche.com/gui/x/xlib/appendix/b/ for more cursors */
   right_curs  = XCreateFontCursor(dpy, XC_mouse);
   middle_curs = XCreateFontCursor(dpy, XC_gumby);    /* :) */
   orig_curs   = XCreateFontCursor(dpy, XC_left_ptr);
   
   XGrabKey(dpy, 115, 0 /*XKeysymToKeycode(dpy, KEYSYM_TO_GRAB), AnyModifier*/ ,
	    root, True, GrabModeAsync, GrabModeAsync);

   XSelectInput(dpy, root, KeyPressMask | KeyReleaseMask );
   
   for (;;) {
      XNextEvent(dpy, &ev);
      switch (ev.type) {
	 case KeyPress:
	    if (ev.xkey.keycode != 115) break;
	    XAutoRepeatOff(dpy);
	    XGetPointerMapping(dpy, map, 5);
	    if (lasttime && (ev.xkey.time-lasttime < DCLICK_TIME) )
	    {  /* double press - remap for middle button  */
	       map[0] = (unsigned char) 2;
	       map[1] = (unsigned char) 3;
	       map[2] = (unsigned char) 1;
	       XDefineCursor(dpy, root, middle_curs);
	    } else {
	       map[0] = (unsigned char) 3;
	       map[1] = (unsigned char) 2;
	       map[2] = (unsigned char) 1;
	       XDefineCursor(dpy, root, right_curs);
	    }
	    lasttime = ev.xkey.time;
	    XSetPointerMapping(dpy, map, 5);
	    break;
	    
	 case KeyRelease:
	    if (ev.xkey.keycode != 115) break;
	    /* Put everything back to normal */
	    map[0] = (unsigned char) 1;
	    map[1] = (unsigned char) 2;
	    map[2] = (unsigned char) 3;
	    XSetPointerMapping(dpy, map, 5);
	    XDefineCursor(dpy, root, orig_curs);
	    XAutoRepeatOn(dpy);
	    break;
	    
	}
    }

   XUngrabKey(dpy, 115 /* XKeysymToKeycode(dpy, KEYSYM_TO_GRAB) */, AnyModifier, root);
   XCloseDisplay(dpy);
}