[josm-dev] Need advice about a recent change in Mapview blocking the plugin cadastre-fr and its Lambert zone projections

[Pieren]

On Tue, Nov 17, 2009 at 9:10 AM, Dirk Stöcker
<openstreetmap at dstoecker.de> wrote:

> Implement preferences into Lambert and drop the autodetection. This is
> anyway a necessary step.
>
> Instead of auto-detection you can then implement a "suggest projection
> switch" requester when user tries to initialy use cadastre-fr in an
> outside region.
>

I'm trying to implement to subprojection and manual configuration of
the Lambert zone but I still have the problem with the recent change
in MapView.paint.

When the projection is configured for a certain zone and MapView calls
the projection for values outside the box in paint(), I cannot warn
the user and I don't have to warn the user because those values are
non-sens since they have nothing to do with the user and its current
activities. The coordinates are not related to the OSM data or any
geodata. They are just based on fancyfull values and I don't know what
to do in latlon2eastNorth in such cases.
I cannot use a JOptionPane because it's called from MapView.paint()
and if I just convert the values silently, the projection is wrong and
the user is never informed even when he is really working outside the
box.

Pieren