Re: tooltip can be displayed outside the screen

[Juri Linkov <juri@jurta.org>]

>> One idea that came to me is that negative offsets could be interpreted
>> as absolute distances between the X (Y) position of the mouse and the
>> right (bottom) border of the tooltip frame (and to leave positive offsets
>> relative to the left (top) border as they work now).  This way no matter
>> what values offsets will have, the tooltip frame will never cover the mouse
>> pointer.  And this will work exactly the same way as currently calculations
>> behave to avoid the tooltip displayed outside the screen (i.e. negating the
>> interpretation of offsets to opposite sides of the tooltip frame).
>
> That seems to complicated. I just fixed so negative offsets is handeled OK.

OK.

BTW, I think current docstrings are not clear.  I propose to change
them as below:

Index: lisp/tooltip.el
===================================================================
RCS file: /sources/emacs/emacs/lisp/tooltip.el,v
retrieving revision 1.70
diff -c -r1.70 tooltip.el
*** lisp/tooltip.el	12 Dec 2005 09:36:22 -0000	1.70
--- lisp/tooltip.el	15 Dec 2005 09:27:14 -0000
***************
*** 96,104 ****
  
  (defcustom tooltip-x-offset 5
    "X offset, in pixels, for the display of tooltips.
! The offset is relative to the position of the mouse.  It must
! be chosen so that the tooltip window doesn't contain the mouse
! when it pops up.
  
  If `tooltip-frame-parameters' includes the `left' parameter,
  the value of `tooltip-x-offset' is ignored."
--- 98,106 ----
  
  (defcustom tooltip-x-offset 5
    "X offset, in pixels, for the display of tooltips.
! The offset is the distance between the X position of the mouse and
! the left border of the tooltip frame.  It must be chosen so that the
! tooltip window doesn't contain the mouse when it pops up.
  
  If `tooltip-frame-parameters' includes the `left' parameter,
  the value of `tooltip-x-offset' is ignored."
***************
*** 108,116 ****
  
  (defcustom tooltip-y-offset +20
    "Y offset, in pixels, for the display of tooltips.
! The offset is relative to the position of the mouse.  It must
! be chosen so that the tooltip window doesn't contain the mouse
! when it pops up.
  
  If `tooltip-frame-parameters' includes the `top' parameter,
  the value of `tooltip-y-offset' is ignored."
--- 110,118 ----
  
  (defcustom tooltip-y-offset +20
    "Y offset, in pixels, for the display of tooltips.
! The offset is the distance between the Y position of the mouse and
! the top border of the tooltip frame.  It must be chosen so that the
! tooltip window doesn't contain the mouse when it pops up.
  
  If `tooltip-frame-parameters' includes the `top' parameter,
  the value of `tooltip-y-offset' is ignored."

-- 
Juri Linkov
http://www.jurta.org/emacs/