Examples of org.geotools.map.MapContent.layers()

org.geotools.map.MapContent.layers()
Gets the list of layers for this map content. The returned list has the following characteristics:
- It is "live", ie. changes to its contents will be reflected in this map content.
- It is thread-safe. Accessing list elements directly or via a {@linkplain java.util.ListIterator} returns a snapshot view of the list contents (as per Java's {@linkplain CopyOnWriteArrayList} class).
- Adding a layer to the list, or removing a layer from it, results in a {@linkplain MapLayerListEvent} being published by the map content.
For these reasons, you should always work directly with the list returned by this method and avoid making copies since they will not have the above behaviour. @return a "live" reference to the layer list for this map content


        menu.add( new SafeAction("Grayscale display") {
            public void action(ActionEvent e) throws Throwable {
                Style style = createGreyscaleStyle();
                if (style != null) {
                    ((StyleLayer) map.layers().get(0)).setStyle(style);
                    frame.repaint();
                }
            }
        });

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        menu.add( new SafeAction("RGB display") {
            public void action(ActionEvent e) throws Throwable {
                Style style = createRGBStyle();
                if (style != null) {
                    ((StyleLayer) map.layers().get(0)).setStyle(style);
                    frame.repaint();
                }
           }
        });
        // Finally display the map frame.

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        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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        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;

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        /*
        * 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);

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    @Test
    public void resetAfterRemovingAllLayersIsIgnored() {
        MapContent mapContent = createMapContent(WORLD);
        mapPane.setMapContent(mapContent);
        mapContent.removeLayer(mapContent.layers().get(0));


        // just checking no exception is thrown
        mapPane.reset();
    }

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        DirectPosition2D pos = ev.getWorldPos();
        createReporter();
        report(pos);


        MapContent content = getMapPane().getMapContent();
        final int nlayers = content.layers().size();
        int n = 0;
        for (Layer layer : content.layers()) {
            if (layer.isSelected()) {
                InfoToolHelper helper = null;

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        report(pos);


        MapContent content = getMapPane().getMapContent();
        final int nlayers = content.layers().size();
        int n = 0;
        for (Layer layer : content.layers()) {
            if (layer.isSelected()) {
                InfoToolHelper helper = null;


                String layerName = layer.getTitle();
                if (layerName == null || layerName.length() == 0) {

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        DirectPosition2D pos = ev.getMapPosition();
        report(pos);


        MapContent context = getMapPane().getMapContent();
        for( Layer layer : context.layers() ) {
            if (layer.isSelected()) {
                InfoToolHelper<?> helper = null;


                String layerName = layer.getTitle();
                if (layerName == null || layerName.length() == 0) {

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            disconnectFromMapContent();
            MapContent newMapContent = (MapContent) ev.getData();
            connectToMapContent(newMapContent);
            
            if (newMapContent != null) {
                for (Layer layer : newMapContent.layers()) {
                    table.onAddLayer(layer);
                }
            }
        }

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