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From: marbru@auto-trol.com (Martin Brunecky)
Newsgroups: comp.windows.x
Subject: Re: How to simulate mouse events from a data tablet
Message-ID: <1991May31.163832.22933@auto-trol.com>
Date: 31 May 91 16:38:32 GMT
References: <1991May30.191703.11099@engage.pko.dec.com>
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Organization: Auto-trol Technology Corporation
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In article <1991May30.191703.11099@engage.pko.dec.com> davis@3d.enet.dec.com (Peter Davis) writes:
>
>>    Can you elaborate on why you have to XGrabPointer ? (I don't, and have
>>    no problems I can see - so far).
>
>XWarpPointer generates it's own motion events.  However, the key/button mask
>in those events is that of the "real" pointing device, rather than the
>"fake" device you're simulating.  So, to get the events to have the correct
>key/button mask, I think you have to grab the pointer, move it, and then
>explicitly send events to the affected window(s).

    Which means you have to properly simulate all enter/leave events. No
    thanx, I am giving up on that one -).
   
>
>Yeah, I probably should do that too.  I don't think there's any trivial way
>to determine which window should get the events.  Nothing I've tried seems to
>work for window manager decoration.
>
        ....Window wins[...] - stack of windows containing the pointer
        /* find the window which wants our event, give up on don't propagate */
        for ( --iw; iw >= 0; --iw)
        {           
           XWindowAttributes attr;
           if ( XGetWindowAttributes ( dpy, wins[iw], &attr ))
           {
                if (attr.all_event_masks & mask       ) break;
                if (attr.map_state != IsViewable      ) continue;
                if (attr.do_not_propagate_mask & mask ) return(FALSE);
           }
        }



-- 
=*= Opinions presented here are solely of my own and not those of Auto-trol =*=
Martin Brunecky                      marbru%auto-trol@sunpeaks.central.sun.com
(303) 252-2499                       (better avoid:  marbru@auto-trol.COM )
Auto-trol Technology Corp. 12500 North Washington St., Denver, CO 80241-2404