Examples of org.geotools.map.MapContent$LayerList

org.geotools.map.MapContent
Stores the contents of a map for display, including a list of layers, a {@linkplain MapViewport} defining the device and world bounds of displayarea, and optional user data.
Methods are provided to add, remove and reorder layers. Alternatively, the list of layers can be accessed directly with the {@linkplain #layers()}. For example:
```
 mapContent.layers().add( newLayer ); 
```
Operations on the list returned by the {@code} layersmethod are guaranteed to be thread safe, and modifying the list contents will result in {@code MapLayerListEvents}being published.
Note: This object is similar to early drafts of the OGC Open Web Service Context specification. @author Jody Garnett @since 2.7 @source $URL$ @version $Id$

      ReferencedEnvelope read3857 = read26915.transform(mapCRS, true);
      
      // setup map content
      StyleBuilder sb = new StyleBuilder();
        Layer layer = new GridReaderLayer(new GeoTiffReader(testFile), sb.createStyle(sb.createRasterSymbolizer()));
        MapContent mc = new MapContent();
        mc.getViewport().setBounds(read3857);
        mc.addLayer(layer);
        
        StreamingRenderer sr = new StreamingRenderer();
        sr.setMapContent(mc);
        BufferedImage result = RendererBaseTest.showRender("testGridCoverageBoundsReprojection", sr, 1000, read3857);

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        g.dispose();
        GridCoverage2D coverage = new GridCoverageFactory().create("test_red", bi, bounds);
        
        Style rst = sb.createStyle(sb.createRasterSymbolizer());
    
    MapContent mc = new MapContent();
    mc.addLayer(new FeatureLayer(fs, pst));
    mc.addLayer(new GridCoverageLayer(coverage, rst));
    
    StreamingRenderer renderer = new StreamingRenderer();
    renderer.setMapContent(mc);
    BufferedImage img = RendererBaseTest.renderImage(renderer, bounds, null);

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    public void testCircle() throws Exception {
        Style pStyle = RendererBaseTest.loadStyle(this, "markCircle.sld");
        Style lStyle = RendererBaseTest.loadStyle(this, "lineGray.sld");
        
        MapContent mc = new MapContent();
        mc.addLayer(new FeatureLayer(lineFS, lStyle));
        mc.addLayer(new FeatureLayer(pointFS, pStyle));
        
        StreamingRenderer renderer = new StreamingRenderer();
        renderer.setMapContent(mc);
        renderer.setJava2DHints(new RenderingHints(KEY_ANTIALIASING, VALUE_ANTIALIAS_ON));

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    }
    
    public void testRenderingBufferCircle() throws Exception {
        Style pStyle = RendererBaseTest.loadStyle(this, "markCircle.sld");


        MapContent mc = new MapContent();
        mc.addLayer(new FeatureLayer(pointFS, pStyle));


        StreamingRenderer renderer = new StreamingRenderer();
        renderer.setMapContent(mc);
        renderer.setRendererHints(Collections.singletonMap(
                StreamingRenderer.ADVANCED_PROJECTION_HANDLING_KEY, true));

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    public void testTriangle() throws Exception {
        Style pStyle = RendererBaseTest.loadStyle(this, "markTriangle.sld");
        Style lStyle = RendererBaseTest.loadStyle(this, "lineGray.sld");
        
        MapContent mc = new MapContent();
        mc.addLayer(new FeatureLayer(lineFS, lStyle));
        mc.addLayer(new FeatureLayer(pointFS, pStyle));
        
        StreamingRenderer renderer = new StreamingRenderer();
        renderer.setMapContent(mc);
        renderer.setJava2DHints(new RenderingHints(KEY_ANTIALIASING, VALUE_ANTIALIAS_ON));

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    public void testDecorative() throws Exception {
        Style pStyle = RendererBaseTest.loadStyle(this, "markDecorative.sld");
        Style lStyle = RendererBaseTest.loadStyle(this, "lineGray.sld");
        
        MapContent mc = new MapContent();
        mc.addLayer(new FeatureLayer(lineFS, lStyle));
        mc.addLayer(new FeatureLayer(pointFS, pStyle));
        
        StreamingRenderer renderer = new StreamingRenderer();
        renderer.setMapContent(mc);
        renderer.setJava2DHints(new RenderingHints(KEY_ANTIALIASING, VALUE_ANTIALIAS_ON));

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        mapLayerTableViewer.clear();


        pane.setMapLayerTable(this);
        mapLayerTableViewer.setPane(pane);


        MapContent mapContent = pane.getMapContent();
        List<Layer> layers = mapContent.layers();
        for( Layer mapLayer : layers ) {
            mapLayerTableViewer.addLayer(mapLayer);
        }
    }

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            public void widgetSelected( SelectionEvent e ) {
                Layer selectedMapLayer = mapLayerTableViewer.getSelectedMapLayer();
                if (selectedMapLayer == null) {
                    return;
                }
                MapContent mapContext = pane.getMapContent();
                mapContext.removeLayer(selectedMapLayer);
                mapLayerTableViewer.selectionChanged(null);
            }
        });


        Button showLayersButton = new Button(buttonComposite, SWT.PUSH);

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    private void moveLayer( int delta ) {
        Layer selectedMapLayer = mapLayerTableViewer.getSelectedMapLayer();
        if (selectedMapLayer == null)
            return;
        List<Layer> layersList = mapLayerTableViewer.getLayersList();
        MapContent mapContent = pane.getMapContent();


        int contextIndex = mapContent.layers().indexOf(selectedMapLayer);


        int viewerIndex = layersList.indexOf(selectedMapLayer);
        int newViewerIndex = viewerIndex + delta;
        if (newViewerIndex < 0 || newViewerIndex > layersList.size() - 1) {
            return;
        }


        /*
        * MapLayerTable stores layers in the reverse order to
        * DefaultMapContext (see comment in javadocs for this class)
        */
        int newContextIndex = contextIndex - delta;
        if (newContextIndex < 0 || newContextIndex > mapContent.layers().size() - 1) {
            return;
        }


        if (contextIndex != newContextIndex) {
            mapContent.moveLayer(contextIndex, newContextIndex);
            pane.redraw();
            Collections.swap(layersList, viewerIndex, newViewerIndex);
            mapLayerTableViewer.refresh();
        }

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     * @return the transform or {@code null} if either the layer's coordinate system is the same
     *         as that of the map context, or either has a {@code null} CRS.
     */
    public MathTransform getTransform() {
        if (transform == null && !transformFailed && dataCRS != null) {
            MapContent content = getMapContent();
            if (content == null) {
                throw new IllegalStateException("map context should not be null");
            }


            CoordinateReferenceSystem contextCRS = content.getCoordinateReferenceSystem();
            try {
                transform = CRS.findMathTransform(contextCRS, dataCRS, true);
            } catch (Exception ex) {
                LOGGER.warning("Can't transform map context to map layer CRS");
                transformFailed = true;

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