Re: [Geotools-gt2-users] JMapPane force repaint

[Greg E. <gr...@er...>]

Hi Michael,

This does not quite work because the the compiler is unable to locate  
the newly defined method in the anonymous subclass.  But, creating a  
named subclass of DefaultMapLayer with your dataChanged method does  
work.

You have to override all of the constructors in DefaultMapLayer, since  
it has no public constructor, like so:

public class UpdatingMapLayer
         extends DefaultMapLayer
{
   UpdatingMapLayer(AbstractGridCoverage2DReader reader, Style style)
           throws Exception
   {
     super(reader, style);
   }

   UpdatingMapLayer(AbstractGridCoverage2DReader reader, Style style,  
String title)
           throws Exception
   {
     super(reader, style, title);
   }

   UpdatingMapLayer(CollectionSource source, Style style, String title)
   {
     super(source, style, title);
   }

   UpdatingMapLayer(Collection collection, Style style)
   {
     super(collection, style);
   }

   UpdatingMapLayer(Collection collection, Style style, String title)
   {
     super(collection, style, title);
   }

   UpdatingMapLayer(FeatureCollection<SimpleFeatureType,  
SimpleFeature> collection, Style style)
   {
     super(collection, style);
   }

   UpdatingMapLayer(FeatureCollection<SimpleFeatureType,  
SimpleFeature> collection, Style style, String title)
   {
     super(collection, style, title);
   }

   UpdatingMapLayer(FeatureSource<SimpleFeatureType, SimpleFeature>  
featureSource, Style style)
   {
     super(featureSource, style);
   }

   UpdatingMapLayer(FeatureSource<SimpleFeatureType, SimpleFeature>  
featureSource, Style style, String title)
   {
     super(featureSource, style, title);
   }

   UpdatingMapLayer(GridCoverage coverage, Style style)
           throws Exception
   {
     super(coverage, style);
   }

   UpdatingMapLayer(GridCoverage coverage, Style style, String title)
           throws Exception
   {
     super(coverage, style, title);
   }

   public void dataChanged()
   {
     sourceListener.changed(null);
   }
}

Cheers,

Greg

On Jan 21, 2009, at 4:53 PM, Michael Bedward wrote:

> Greg,
>
> Could you test this for me please ?
>
>        // instead of myMapContext.addLayer( myGrid, myStyle ) do  
> this...
>        //
>        MapLayer myGridLayer = new DefaultMapLayer(myGrid, myStyle) {
>            public void dataChanged() {
>                sourceListener.changed(null);
>            }
>        };
>
>        myMapContext.addLayer(myGridLayer);
>
>        // later when you've changed the grid data
>        myGridLayer.dataChanged();
>
> Fingers crossed...
>
> Michael