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Re: Emacs 21 font issues and manual window manipulation.

From: Kevin A. Burton
Subject: Re: Emacs 21 font issues and manual window manipulation.
Date: 22 Oct 2001 02:11:09 -0700
User-agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/21.1

Hash: SHA1

Eli Zaretskii <address@hidden> writes:

> On 22 Oct 2001, Kevin A. Burton wrote:
> > > > This work in theory but there is no way for me to get an x-offset and
> > > > y-offset for the tooltip because Emacs doesn't provide any way for me to
> > > > find the x-offset and y-offset for the pointer.
> > > 
> > > I think you don't need to.  See the doc string of x-show-tip: it says 
> > > that if
> > > tooltip-frame-parameters alist includes `left' and `top' parameters, these
> > > parameters determine where the tooltip is popped.
> > 
> > Yes... but where do I get the integer value for left and top?
> These are the coordinates of point in character cell units,

No.  Left and top are *not* character cell units.  They are pixel relative to
the current display.

> like for any other Emacs frame.  You should be able to compute them from the
> top and left coordinates of the frame or window and the relative position of
> point inside the window.

I tried this too.  It is too flaky.

- - menu-bar-mode, scroll-bar-mode, etc get in the way.

- - the presence of setnu-mode and other glyphs can screw this up :(

> > > Adding this would be a simple matter of providing a Lisp wrapper around
> > > glyph_to_pixel_coords, I think.
> > 
> > I assume that on *NIX systems this is defined in xterm.c?
> Probably, but "M-." will tell ;-)
> > This is frame-relative and x-show-tip is display relative.  I need to get 
> > the
> > x,y coords for the point WRT the display.
> ??? Why wrt the display?  Don't you want the tooltip at some frame-relative
> position, or even just near point, as if the user moved the mouse pointer
> above the text she just typed?

It shouldn't have anything to do with the mouse pointer.  :).  This can be too
far away from where the users eyes are currently directed (just like the

Instead I need this right next to the point.  The current x-show-tip is relative
to the mouse pointer and not the (point) :(

> > BTW it is *REALLY* awesome to see this mailing list has been created :)
> It existed for more than a year, the only news is that it is now public, so
> you can subscribe if you want.  But you could post to it even before.

OK.. must have missed it.  I didn't see savanah until about 3 months ago.


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