[Rd] Windows testing

[Duncan Murdoch]

Some bugs in graphics windows.  I'm using a new build based on today's
r-devel.  In all cases, I started a new copy of Rgui, and ran 

 plot(1,1)

then started playing with the menus on the graphics window.

1.  The "copy as metafile" popup doesn't work.  It gives an error
message on the console, and leaves R in an unstable state.

Here's the error:

Error: axis style "
> > 

2.  Selecting "Resize|fit to window" crashes the window if you shrink
it so small that there is no space for the graph, just space for the
margins. There should be some limit to how small you're allowed to
shrink the window.

3.  Selecting "Resize|fixed size" allows you to move the view of the
graph around if you've got a smaller window than the graph.  But if
you 
  - shrink the height of the window
  - scroll to the bottom of the graph
  - grow the window back to its original size
you end up still only able to see the bottom part of the graph.  The
graph should automatically scroll back down, so as much as possible of
it is visible.

4.  Not reproducible, but while experimenting with 3, it appeared
sometimes "mouse up" events were being missed, so you'd still be
resizing the window after you'd let go of the corner of it.

5.  And a suggestion for some future release:  using a double-buffered
display would make resizing less "flashy".

Duncan
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