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Re: "Why is emacs so square?"

From: Eli Zaretskii
Subject: Re: "Why is emacs so square?"
Date: Sun, 07 Jun 2020 17:21:29 +0300

> From: Tomas Hlavaty <tom@logand.com>
> Cc: emacs-devel@gnu.org
> Date: Sun, 07 Jun 2020 10:03:35 +0200
> I poked around a bit and it seems that what I did in emacs-pdf
> (pdf-buffer function) is similar to what ps-print-buffer function does
> in ps-print and ps-mule with ps-multibyte-buffer set to nil.

BDF fonts were OK when ps-mule.el and ps-bdf.el were developed, but
nowadays I think you will find that many users will object to using
bitmapped fonts in printed matter.  (There were plans to develop
ps-type1.el, but I don't think they materialized.)  Caveat emptor.

> There is frame-position but no window-position.  Is there a way to get
> window position in a frame?

Is window-edges what you want?

> >>    For example, I would like to browse OpenStreetMap in Emacs.  I wrote
> >>    a console based OSM browser osmq
> >>    <https://logand.com/sw/osmq/log.html> and web-based OSM browser at
> >>    <https://osmq.eu/>.  I would prefer an Emacs based map browser.
> >>    However, I have not figured out how to lay out images in Emacs in a
> >>    grid and how to detect which image was clicked.  A bonus would be,
> >>    where exactly was clicked.  Any ideas what should I look into?
> >
> > Emacs supports "hot spots" on images for this: a click on an image
> > returns information about pixel-resolution offset of the click from
> > the image origin.  I think that's what you want, although I'm not 100%
> > sure.
> Yes.  Is there an example how to start with this?

I suggest to read "Click Events" and "Accessing Mouse" in the ELisp
manual, I think the description there is clear enough to let you write
code even without examples.

> > We also support displaying slices of images, in case that helps to
> > produce a smarter layout of images.
> Great.  Is there an example?

Likewise here: I suggest to read "Showing Images", where this is

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