There must be an JMapPane.setReset(true) before the repaint.
I think this will solve your problem.
Kind regards
Martin Schmitz
dziadgba dziadgba schrieb:
> hy to everybody,
> a few years ago I used geotools to calculate and visualize itineraries for
> bikers using shape files containing road information.
>
> No I would like to provide an interface for the placement of antennas in
> the territory, but it seems that everything changed in geotools. I did
> the following to visualize a shapefile but nothing is visualized and no
> error message occurs. Shapefile includes roads. Maybe someone more
> expert can have a look on it?
>
> thanks
> dyiadgba
>
> URL shapefileURL = getClass().getResource("data/str/str.shp");
>
> ShapefileDataStore dsRoads = new ShapefileDataStore( shapefileURL );
> FeatureSource source = dsRoads.getFeatureSource ("str");
>
> public Style demoStyle(String typeName) throws Exception {
> StyleBuilder sb = new StyleBuilder();
>
> LineSymbolizer lsStream = sb.createLineSymbolizer (Color.BLUE, 8);
> Style style = sb.createStyle (lsStream);
>
> JFrame frame = new JFrame("FOSS4G");
> frame.setBounds(20,20,450,200);
> frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE );
>
> JMapPane mp = new JMapPane();
> frame.getContentPane ().add( mp);
> mp.setMapArea(source.getBounds());
>
> MapContext context = new DefaultMapContext(DefaultGeographicCRS.WGS84);
> context.setAreaOfInterest( new ReferencedEnvelope(-179.0,179.0,-80.0,80.0,
> DefaultGeographicCRS.WGS84 ));
> context.addLayer( source, style );
>
> GTRenderer renderer = new StreamingRenderer();
> HashMap hints = new HashMap();
> hints.put("memoryPreloadingEnabled", Boolean.TRUE);
> renderer.setRendererHints ( hints );
>
> mp.setRenderer(renderer);
> mp.setContext(context);
>
> frame.setVisible(true);
> frame.repaint();
>
>
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