Re: window groups

[martin rudalics]

>      The most common example would be an in-frame speedbar, which is
>      something people (including me) want, but which is not offered by
>      the version of speedbar in Emacs because it just doesn't work well
>      with Emacs' primitive management of in-frame windows.

I wrote my own sidebar to show various things like files, buffers, tags,
bookmarks or search results.  For example, I browse tags by moving
up-/downwards in the tag-sidebar and, after a short timeout, have the
window on the right move point to the location referenced by the tag.
This movement is synchronized in a way that the line showing the tag and
the line showing the defun always occupy the same screen line.

All this worked well but was continuously screwed up by `display-buffer'
splitting the right window and breaking my line-to-line correspondence.
Now I have sidebar and main window form a window group and the problem
is gone.