Re: Multimedia dashboard in GNU Emacs

[Po Lu <luangruo@yahoo.com>]

Aiko Kyle <aikokyle@gmail.com> writes:

> I think that the question of how well an xwidget obeys "the emacs
> paradigm" depends on the content it's displaying. If it were a button
> or some other element in a larger button, I agree that the current
> model fits the emacs way well enough. However I think when the xwidget
> is the only element in a buffer and takes up a large portion or even
> the whole window, then I think the correct paradigm would resemble
> something like doc-view, where the two widow's xwidgets can show
> different views if they have some notion of scrolling.

I think Doc View uses per-window overlays to achieve that, which you can
also do with xwidgets.

> This is the current implementation that Po Lu has fixed various
> flickering bugs on master for xwidgets on x.

That was the old implementation as well, but it used GDK windows instead
of X windows, which could be painted over by Emacs drawing commands, and
caused flickering.

That doesn't make sense with a GtkSocket, because it uses XEmbed
under-the-hood, which basically tells some other program where to place
a window.  A GtkSocket does no drawing by itself.

A better solution would be to redirect a window (given an XID) to some
off-screen pixmap, and to display that pixmap in every window instead.