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From: "Jan D." <jan.h.d@swipnet.se>
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Subject: Re: x-popup-menu pops up at funny positions
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>>     One could replace parent_desc with the root window, but it
>>     seemd pointless to do a query to the X server when Emacs
>>     has all the information already and a simple addition finds
>>     the current position.
>>
>> I am not sure it is always up to date.  Could you check?
>
> I will check some more on different window managers, but so far
> it has been up to date.  I studied the code and I believe it keeps
> things up to date.

There is one border case.  When a dialog is up and the Emacs frame is
moved, then the positions will be wrong.  Updating the positions
on EnterNotify by calling x_real_position fixes that.

	Jan D.