From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <4761300C.6070208@gmx.de>
Date: Thu, 13 Dec 2007 14:13:48 +0100
From: Kernel Panic <cinap_lenrek@gmx.de>
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To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
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Subject: [9fans] rio scaling
Topicbox-Message-UUID: 1707e106-ead3-11e9-9d60-3106f5b1d025

Hi,

I often use rio-in-rio to group windows. If you draw a new window, rio 
prevents you from
making the window too small to manage (goodrect), but it is possible to 
make windows
smaller by starting a rio-in-rio, create a window in the subrio and 
shrink the parent window,
so the parent scales its children down to a bad size. This results in 
rio to crash in
libframe sometimes:

"draw: frcanfit == 0: screen id in use"

My question is:

Should programs rely on rio making ther windows always a goodrect or 
should it deal with the
case of drawing in a 10x10 or 1x1 image?

I experimented a little bit to find a work arround to this problem. I 
added code to rio
to not making windows smaller than 100 x (3*font->height), but if you 
make rio bigger again
(after shrinking) the window gets too big. So i think about just not to 
scale subwindows at all
to preserve position and size of the subwindows.

Any better ideas?

cinap