Delay between widget background and widget contents

[Christoph Bartoschek]

Am Freitag, 4. Dezember 2009 schrieb Peter Harris:

> 
> It's not clear where the Expose is coming from. It doesn't appear to be
> in response to a MapWindow or ClearArea. It somewhat looks as though
> another (unrelated?) window is unmapped, but you don't see that in the
> trace since it doesn't include the rest of the desktop.
> 
> I might suspect that the app is unnecessarily stalling waiting for an
> event, when it should just continue processing. But I have no evidence
> for this assertion.

I was wrong with the packets. The delay is caused earlier. The problem are all 
the ListFonts calls.

The application calls XCreateFontSet with the string "-*-fixed-medium-r-*-
*-16-*,-*-*-medium-r-*-*-16-*"

The result is that lots of ListFonts requests and replys are exchanged 
followed by ListFontsWithInfo requests.

Is it correct that libX11 behaves in this way? If it is necessary to send all 
this requests, wouldn't it be possible to send all requests in a bundle?

Christoph