backend switching broken

[Michael Goffioul]

Note that "backend" function also accepts a handle (or list
of handles) to apply the new specified backend.

Michael.


On Thu, Jul 23, 2009 at 7:35 PM, John W. Eaton<jwe at octave.org> wrote:
> On 14-Jun-2009, Elias Pipping wrote:
>
> | --------
> | Bug report for Octave 3.2.0 configured for x86_64-pc-linux-gnu
> |
> | Description:
> | -----------
> |
> |   * Starting octave, running `backend("fltk")` and invoking plot
> |     yields a plot in fltk. Switching to gnuplot using
> |     `backend("gnuplot")` works, too -- the next plot will be done by
> |     gnuplot -- but switching back does not, i.e. `backend("fltk")` has
> |     no effect once gnuplot has been used.
>
> If I start a new Octave session and execute the commands
>
>  backend ("fltk")
>  sombrero
>  backend ("gnuplot")
>  peaks
>
> both surfaces are drawn in the figure 1 window using the fltk
> backend.  If I then do
>
>  figure
>
> the second figure window uses gnuplot.
>
> I'm not sure what the proper behavior is, but it seems OK to me that
> the new backend will only apply to new figure windows.  So if you want
> to switch, you need to either close existing figure windows or open a
> new figure.
>
> Maybe we should issue a warning stating that changing the backend will
> only apply to new figure windows?
>
> jwe
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