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From: dshr@eng.sun.COM (David Rosenthal)
Newsgroups: comp.windows.x
Subject: Re: Setting input focus to terminal window
Message-ID: <9103221516.AA19243@devnull.Eng.Sun.COM>
Date: 22 Mar 91 15:08:32 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 25

> There's something I'm missing regarding the management of keyboard
> focus in the presence of a manager.  I have a program in which I want
> to switch focus back to the terminal window from which the program
> is running (away from the work window the program itself has created)
> so that the user can type in some new parameters; the switch is triggered
> by some event in the main window (mouse-click or key-press).  (...Okay,
> I know that the "proper" way to do it would be to pop up a dialog window
> using one of the toolkits, but this program is a conversion from an old
> X10 one, and I'm trying to keep it as close as I can to the original
> for now.)
> 
The ICCCM Section 4.1.7 [page 524 of the Digital Press 2nd edition]
describes four possible models of input focus handling for
non-window-manager clients.  They all assume that if a client sets
the input focus,  it does so to a window that it itself owns.  This
should probably be stated explicitly.

Attempts by one client to set the input focus to a window belonging to
another client are unlikely to succeed - you are attempting to usurp
the functions of the window manager,  and you are trying to wire in to
your program details of the way a particular window manager works.
I'm afraid that you will have to make the effort to do it the proper
way.

	David.