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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: <1991May30.022513.15790@auto-trol.com>
Date: 30 May 91 02:25:13 GMT
References: <1991May29.150652.20665@engage.pko.dec.com>
Sender: news@auto-trol.com
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Organization: Auto-trol Technology Corporation
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In article <1991May29.150652.20665@engage.pko.dec.com> davis@3d.enet.dec.com (Peter Davis) writes:
>
>Gee, I'm trying to do almost this exact thing.  I'm looking at a whole
>bunch of input devices, and I want to be able to simulate mouse movements
>by sending events, and then send any additional data that the devices can
>input via the ClientMessage mechanism.
>
>To do motion, I found I had to:
>
>   1	XQueryPointer to get the current position,
>   2    find the lowest offspring of the pointer window which still contains
>	the pointer position,
>   3	XTranslateCoordinates to get the coordinates relative to that
>	offspring,
>   4	XSendEvent to send a motion event to that window,
>   5	XGrabPointer
>   6	XWarpPointer
>   7	XUngrabPointer
  .....
    Can you elaborate on why you have to XGrabPointer ? (I don't, and have
    no problems I can see - so far).
    Plus, I also found I have to look at what events those windows are
    interested in. The "propagate" mechanism did not work for me, so I am
    looking for the "topmost" window containing the pointer AND interested
    in a particular event.

>
>To do button transitions, I had to:
>
    ....(more of the same as above, without grabs - deleted).....

    I found I can easily send a button event. The problems arise when the
    client receiving this button event either:
    - assumes a passive grab
    - grabs the button explicitly.

    For example, trying to resize window from a "simulated" mouse under
    most widnow managers won't work - those guys grab the "real" mouse
    button - which is not depressed.
    Grabbing the pointer for motions might help, but I am worried it will
    confuse other things ....


-- 
=*= 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