Application: gvSIG desktop

package org.gvsig.fmap.mapcontext.raster.swing.impl.previewer;

import java.awt.BorderLayout;

import java.awt.Dimension;

import java.awt.Rectangle;

import javax.swing.JComponent;

import javax.swing.JPanel;

import org.cresques.cts.IProjection;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.fmap.dal.exception.ReadException;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.MapContextLocator;

import org.gvsig.fmap.mapcontext.layers.FLayer;

import org.gvsig.fmap.mapcontext.layers.FLayers;

import org.gvsig.fmap.mapcontext.layers.FLyrDefault;

import org.gvsig.fmap.mapcontext.raster.swing.previewer.OneLayerPreviewer;

import org.gvsig.fmap.mapcontext.rendering.legend.events.LegendChangedEvent;

import org.gvsig.fmap.mapcontext.rendering.legend.events.listeners.LegendListener;

import org.gvsig.fmap.mapcontrol.MapControl;

import org.gvsig.fmap.mapcontrol.MapControlCreationException;

import org.gvsig.fmap.mapcontrol.MapControlLocator;

import org.gvsig.fmap.mapcontrol.tools.PanListenerImpl;

import org.gvsig.fmap.mapcontrol.tools.ZoomInListenerImpl;

import org.gvsig.fmap.mapcontrol.tools.ZoomOutListenerImpl;

import org.gvsig.fmap.mapcontrol.tools.Behavior.Behavior;

import org.gvsig.fmap.mapcontrol.tools.Behavior.MouseWheelBehavior;

import org.gvsig.fmap.mapcontrol.tools.Behavior.MoveBehavior;

import org.gvsig.fmap.mapcontrol.tools.Behavior.PointBehavior;

import org.gvsig.fmap.mapcontrol.tools.Behavior.RectangleBehavior;

import org.gvsig.fmap.mapcontrol.tools.Listeners.PanListener;

import org.gvsig.tools.dispose.Disposable;

import org.gvsig.tools.dispose.DisposeUtils;

import org.gvsig.tools.locator.LocatorException;

/**

 * @author fdiaz

 *

 */

public class DefaultOneLayerPreviewer extends JPanel implements OneLayerPreviewer, Disposable {

    /**

     *

     */

    private static final long serialVersionUID = -2657400357281080433L;

    private static final Logger LOG = LoggerFactory.getLogger(DefaultOneLayerPreviewer.class);

    private MapControl mapControl;

    private FLayer layer;

    private LegendListener legendListener;

    /**

     *

     */

    public DefaultOneLayerPreviewer() {

        this.setPreferredSize(new Dimension(300, 200));

        legendListener = new LegendListener() {

            @Override

            public void legendChanged(LegendChangedEvent e) {

                doLegendChanged(e);

            }

        };

        this.setLayout(new BorderLayout());

        this.add(getMapControl(), BorderLayout.CENTER);

    }

    @Override

    public JComponent asJComponent() {

        return this;

    }

    @Override

    public void setProjection(IProjection projection) {

        MapContext mapContext = mapControl.getMapContext();

        mapContext.setProjection(projection);

    }

    @Override

    public void setLayer(FLayer layer) {

        this.layer = layer;

        MapControl mapControl = getMapControl();

        MapContext mapContext = mapControl.getMapContext();

        FLayers layers = mapContext.getLayers();

        while (layers.size() > 0) {

            layers.remove(0);

        }

        if (layer != null) {

            DisposeUtils.bind(layer);

            if (mapContext.getProjection() == null) {

                setProjection(layer.getProjection());

            }

            layers.add(layer);

            ((FLyrDefault) this.layer).addLegendListener(legendListener);

            try {

                mapControl.getViewPort().setEnvelope(layer.getFullEnvelope());

            } catch (ReadException e) {

                LOG.warn("Can't get the full envelope of the layer.", e);

            }

        }

    }

    /**

     *

     */

    protected MapControl getMapControl() {

        if (mapControl == null) {

            try {

                final MapContext mapContext = MapContextLocator.getMapContextManager().createMapContext();

                mapControl = MapControlLocator.getMapControlManager().createJMapControlPanel(mapContext);

                // pan

                PanListener panListener = new PanListenerImpl(mapControl);

                mapControl.addBehavior("pan", new MoveBehavior(panListener, Behavior.BUTTON_LEFT));

                // Zoom out (pinchas y el mapa se centra y te muestra m?s).

                // No es dibujando un rect?ngulo, es solo pinchando.

                ZoomOutListenerImpl zoomOutListener = new ZoomOutListenerImpl(mapControl);

                mapControl.addBehavior("zoomOut", new PointBehavior(zoomOutListener));

                // Zoom por rect?ngulo

                ZoomInListenerImpl zoomInListener = new ZoomInListenerImpl(mapControl);

                mapControl.addBehavior("zoomIn", new Behavior[] { new RectangleBehavior(zoomInListener),

                    new PointBehavior(zoomOutListener, Behavior.BUTTON_RIGHT) });

                mapControl.setTool("zoomIn");

                mapControl.addCombinedBehavior(new MouseWheelBehavior());

                mapControl.addCombinedBehavior(new MoveBehavior(panListener, Behavior.BUTTON_MIDDLE));

            } catch (MapControlCreationException | LocatorException e) {

                LOG.warn("Can't create mapControl to preview.", e);

            }

        }

        return mapControl;

    }

    /**

     * @param e

     */

    private void doLegendChanged(LegendChangedEvent e) {

        MapContext mapContext = mapControl.getMapContext();

        mapContext.invalidate();

        mapControl.paintImmediately(new Rectangle(mapControl.getSize()));

    }

    @Override

    public FLayer getLayer() {

        return layer;

    }

    @Override

    public void dispose() {

        if(mapControl==null){

            return;

        }

        MapContext mapContext = mapControl.getMapContext();

        FLayers layers = mapContext.getLayers();

        while (layers.size() > 0) {

            ((FLyrDefault)layers.get(0)).removeLegendListener(legendListener);

            layers.remove(0);

        }

        DisposeUtils.dispose(layer);

        layer = null;

        DisposeUtils.dispose(mapContext);

        mapContext = null;

        mapControl.dispose();

    }

}