From: Eli Zaretskii <eliz@gnu.org>
To: Dov Grobgeld <dov.grobgeld@gmail.com>
Cc: Luangruo@yahoo.com, emacs-devel@gnu.org, tomas@tuxteam.de
Subject: Re: Stylus drawing input?
Date: Tue, 24 Jan 2023 14:27:20 +0200 [thread overview]
Message-ID: <83zga8glsn.fsf@gnu.org> (raw)
In-Reply-To: <CA++fsGEGfKu_baZw7LcqPNUGtWtgduk4ZGh3GbH_9V0pyt=jLg@mail.gmail.com> (message from Dov Grobgeld on Tue, 24 Jan 2023 10:03:02 +0200)
> From: Dov Grobgeld <dov.grobgeld@gmail.com>
> Date: Tue, 24 Jan 2023 10:03:02 +0200
> Cc: emacs-devel@gnu.org, tomas@tuxteam.de
>
> Thanks. I need some guidance on how feasible the following is and how
> I would go about doing it.
>
> 1. How do I draw vector graphics object in an emacs buffer. I.e.
> line-to, move-to, close-path, fill etc. Do I need to generate the
> pixels on my own (can be done e.g. with the agg library or with
> libcairo) and then place the image as on overlay (how?), or is there
> higher lever interface? Is it accessible from elisp or from C?
> 2. How can I trace the x,y input coordinates of mouse movement. E.g.
> I'd like to run a command to enter capture mode, and then catch
> subsequent motion events of the mouse, until the mouse button is
> raised. The resulting object should be a list of motion coordinates.
> 3. How would I do the same for a stylus while catching additional pressure data?
> 4. Given some vector graphics objects drawn on the screen, how would I
> do mouse hit detection, so that doing a mouse click on the object,
> returns the object id? (This I can do "offline" though, by drawing a
> "label image" of the buffer contents on mouse press end then finding
> the label of the object under the mouse.)
Does the svg.el library help with some of the above?
next prev parent reply other threads:[~2023-01-24 12:27 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-12 6:39 Stylus drawing input? Dov Grobgeld
2023-01-14 6:06 ` Richard Stallman
2023-01-14 8:17 ` Dr. Arne Babenhauserheide
2023-01-14 9:38 ` Peter
2023-01-14 9:57 ` Eli Zaretskii
2023-01-14 10:49 ` Dr. Arne Babenhauserheide
2023-01-15 5:13 ` Richard Stallman
2023-01-16 7:41 ` Dr. Arne Babenhauserheide
2023-01-16 7:45 ` Dr. Arne Babenhauserheide
2023-01-16 8:26 ` tomas
2023-01-23 21:15 ` Dov Grobgeld
2023-01-23 23:48 ` Po Lu
2023-01-24 8:03 ` Dov Grobgeld
2023-01-24 10:50 ` Po Lu
2023-01-24 12:27 ` Eli Zaretskii [this message]
2023-01-24 15:55 ` Dov Grobgeld
2023-01-24 17:00 ` Eli Zaretskii
2023-01-14 9:50 ` Po Lu
2023-01-15 5:13 ` Richard Stallman
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