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Re: Coordinates and Windows

From: martin rudalics
Subject: Re: Coordinates and Windows
Date: Mon, 20 Jul 2015 09:04:50 +0200

>> So couldn't we do away with those pseudo-windows needed
>> for tool and menu bars?
> Not on GUI frames, no.  On text-mode frames we have per-frame glyph
> matrices (and actually the glyph matrices of the windows are just
> slices of their frame's matrix).  But on GUI frames, there's no frame
> glyph matrix, so you need a window to be able to draw anything.
> (And they are not pseudo-windows, btw; they are full-fledged windows,
> they just display stuff that comes from strings generated by the
> display engine, not from some buffer.)

If they are not pseudo-windows then why do they have the pseudo_window_p
flag get set in adjust_frame_glyphs_for_window_redisplay?


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