CLG plotter cleanup

[John-Mark Bell]

On Tue, 2009-06-30 at 23:18 +0100, Chris Young wrote:
> I know I call ami_clg in a couple of places manually, IIRC the reason
> was that when clicking on a link to certain content (SVG, I'm sure
> there were others too) didn't clear the previous page so you ended up
> with the SVG superimposed on top of the previous page.
> 
> I can easily replace these calls, but there may be another issue there
> that needs looking at.

I guess there's 2 options here:

1) Expect that the frontend clears the window contents when a complete
redraw is performed.
2) The relevant content redraw functions clear the background of the
area they're going to draw.

Either way, I think this is orthogonal to removing the CLG hook.

Thoughts?


J.