Hi everyone,
This is how I do to update a JMapPane. I created an update method
taking as arguments the new area of interest and the new CRS (if you
wish to change it, to perform a map rotation for instance).
The fixAspectRatio method is the same than the JMapPane one. There is
maybe a smarter way to do it but this method works.
The only problem is when you decide to resize the window containing
the map : at some point, it seems the JMapPane (or is it the
StreamingRenderer ?) asks all layers for their bounds and goes back to
a view containing all your data (even if you were zoomed in...). Not
very convenient...
public final Envelope update(final Envelope newBounds,
final CoordinateReferenceSystem newCRS) {
// Computes the new envelope with the same aspect ratio
Envelope newEnv = fixAspectRatio(newBounds);
// Applies the transformation
mapViewer.setMapArea(newEnv);
mapViewer.getContext().setAreaOfInterest(newEnv, newCRS);
// Redraw the map
mapViewer.repaint();
return newEnv;
}
Le 27 févr. 09 à 00:15, Michael Bedward a écrit :
> Hi Carsten,
>
> I thought the same as you. The method name, setAreaOfInterest,
> certainly implies that it should do what you are expecting, but it
> doesn't :-(
>
> All that happens is that the bounds you set are stored by the context
> and can be retrieved (by you) later with the getter method. I think
> it would be nicer if the MapContext fired an event when the user
> changes the AOI.
>
> Michael
>
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