From: Richard Stallman <rms@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: No possibility of determining image position/object from click
Date: Sun, 9 Jun 2002 09:19:15 -0600 (MDT) [thread overview]
Message-ID: <200206091519.g59FJFk00269@aztec.santafe.edu> (raw)
In-Reply-To: <x5r8jnfi8a.fsf@tupik.goethe.zz> (David.Kastrup@t-online.de)
GNU Emacs is missing an API for finding out where a click occured. If
I have a string or an image as part of a display property, or as a
before-string or after-string, the only way to let Emacs react to
clicks on different images differently is to generate individual
keymaps for each of them.
I see. All it provides is the buffer position, which won't tell
you the position within the before-string.
I think we should replace the buffer position with a list that gives
the full story.
Even then, you cannot find out the
relative coordinates of a click on such an image.
It does give the x and y pixel coordinates of the click. If you can
determine the coordinates of a corner of the image, you can subtract
and get the relative position. But I am not sure there is any way to
determine the corner's coordinates, if the image comes from a
before-string.
In principle, these are good features to add. Do you have an
immediate practical application for them?
next parent reply other threads:[~2002-06-09 15:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <x5r8jnfi8a.fsf@tupik.goethe.zz>
2002-06-09 15:19 ` Richard Stallman [this message]
2002-06-09 20:36 ` No possibility of determining image position/object from click David Kastrup
2002-06-15 14:13 ` Richard Stallman
2002-06-15 14:34 ` David Kastrup
2002-06-15 16:58 ` Eli Zaretskii
2002-06-15 17:10 ` David Kastrup
2002-06-16 23:29 ` Richard Stallman
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