[Xprint] IDEA: A tool which prints an application window
roland.mainz at nrubsig.org
Thu Oct 7 14:53:02 PDT 2004
> I spend some time with reading the XPrint documentation today - and
> after some time I was thinking myself 'hey, wouldn't it be cool if I
> can make snapshots from any application using XPrint? Its a Xserver
> after all, kind of, so any X application runs on it, right?'. Is that
> feasible - a tool which redirects an application window to the print
> server and prints that?
I thought a little bit about the issue. The primary problems are:
1. How to display the application on the Xprint server that it appears
within the paper surface (in Xprint the X11 windows usually represent
surfaces on paper) ?
2. How can it be detected that the application finished content loading
(for example a browser), layout, rendering etc. ?
3. How should pagination be implemented ?
4. How should the launched application be terminated ? There is no
window manager running on Xprt so another way is needed to send a
"window close" message to the application.
 can be realised quite easy using the APPGROUP extension which allows
an application to specify a window as display area. Then a special
MIT-MAGIC-COOKIE-1 gets generated using the SECURITY extension - all
applications which use this cookie will automagically apper within the
appgroup display area.
 is much harder to realise
 could be done using XawPrintShell, however the limitation is than
the total height of pages cannot exceed 2^15-1 pixels due a limitation
in the XawPrintShell code.
 I remember that somewhere was some example code whoch showed how to
send a "window close" message to an application using it's window id.
Alternatively |XKillClient()| could be used, however I don't like that
We need a name for the tool. Suggested names:
Better suggestions welcome...
__ . . __
(o.\ \/ /.o) roland.mainz at nrubsig.org
\__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer
/O /==\ O\ TEL +49 641 7950090
(;O/ \/ \O;)
More information about the xorg