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From: nazgul@alphalpha.com (Kee Hinckley)
Newsgroups: comp.windows.x.motif
Subject: Re: XtDestroyWidget & Gadgets
Message-ID: <901012171654.11385@alphalpha>
Date: 12 Oct 90 21:16:54 GMT
References: <9010111926.AA01346@crc.skl.dnd.ca>
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> As an aside, I haven't seen any info in the Motif docs regarding the
> when's & why's of destroying widgets.  What I've been doing is keeping

In 1.0 you almost always crash when you destroy widgets.  Much
better to just unmange (or for dialogs, unmap) them and reuse
them later.  Even if you don't crash you'll probably leak memory
like crazy.  In all fairness this isn't completely Motif's fault, there
are lots of problems in the Intrinsics as well.

In 1.1, with patchlevel 16 or so of Xt, things are much better.
There seem to be no major leaks on deletion (I've seen some
when I override translations in my program, but I think it's an
Intrinsics bug and I haven't had time to track it down for sure).
There are a couple places where Motif is referencing just
deleted widgets but those are rarely fatal and should be fixed
in 1.1.1.

However.  I don't know how fast your machines are, but
caching windows and even dialogs can make huge differences
in speed, so even without leaks and bugs I think it's well
worth it if you can.

A side question here.  Is there anyone on the motif list who
is using 1.1 and isn't a OSF support customer (and thus
on motif-talk)?  I've been assuming it hasn't filtered out
into binary-only form yet, but I could be wrong.