| gvSIG desktop 1

/* gvSIG. Sistema de Informaci�n Geogr�fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib��ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package org.gvsig.app.project.documents.view.toolListeners;

import java.awt.Image;

import java.util.HashMap;

import java.util.Map;

import javax.swing.JDialog;

import javax.swing.JPanel;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.messages.NotificationManager;

import org.gvsig.andami.ui.mdiManager.IWindow;

import org.gvsig.app.ApplicationLocator;

import org.gvsig.app.ApplicationManager;

import org.gvsig.app.project.documents.view.info.gui.FInfoDialog;

import org.gvsig.fmap.geom.primitive.Point;

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

import org.gvsig.fmap.mapcontext.layers.operations.InfoByPoint;

import org.gvsig.fmap.mapcontrol.MapControl;

import org.gvsig.fmap.mapcontrol.MapControlLocator;

import org.gvsig.fmap.mapcontrol.swing.dynobject.LayersDynObjectSetComponent;

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

import org.gvsig.fmap.mapcontrol.tools.Events.PointEvent;

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

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynObjectSet;

import org.gvsig.tools.extensionpoint.ExtensionPoint;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

import org.gvsig.tools.extensionpoint.ExtensionSingleton;

/**

 * Listener that looks for information at the point selected by one

 * click of any mouse's button, in the active layers of the associated

 * <code>MapControl</code>, and displays that data on a {@link FInfoDialog

 * FInfoDialog} dialog.

 *

 * @author -2009 Vicente Caballero Navarro

 * @author 2009- gvSIG Team

 */

public class InfoListener implements PointListener {

    /**

     * Object used to log messages for this listener.

     */

//

    private static final Logger logger = LoggerFactory.getLogger(InfoListener.class);

    private static final String EP_INFOTOOL_NAME = "org.gvsig.app.infotool";

    private static final String EP_INFOTOOL_RENDERER = "renderer";

    public static void initializeExtensionPoint() {

        ExtensionPointManager manager = ToolsLocator.getExtensionPointManager();

        ExtensionPoint point = manager.add(EP_INFOTOOL_NAME, "Register of data relative to infotool");

        point.append(

            EP_INFOTOOL_RENDERER,

            "Renderer used to show in a panel the info by point tool.",

            new DefaultInfoByPointRenderer()

        );

    }

    /**

     * The image to display when the cursor is active.

     */

    private final Image img = PluginServices.getIconTheme()

        .get("cursor-info-by-point").getImage();

    /**

     * Reference to the <code>MapControl</code> object that uses.

     */

    private MapControl mapCtrl;

    /**

     * Radius as tolerance around the selected point, the area will be used to

     * look for information.

     */

    private static int TOL = 7;

    /**

     * <p>

     * Creates a new <code>InfoListener</code> object.

     * </p>

     *

     * @param mc

     *            the <code>MapControl</code> where will be applied the changes

     */

    public InfoListener(MapControl mc) {

        this.mapCtrl = mc;

    }

    public void point(PointEvent event) throws BehaviorException {

        try {

            ApplicationManager application = ApplicationLocator.getManager();

            int numLayersInfoable = 0;

            Point point = event.getMapPoint();

            double tolerance = mapCtrl.getViewPort().toMapDistance(TOL);

            FLayer[] sel = mapCtrl.getMapContext().getLayers().getActives();

            Map<String, DynObjectSet> layer2info =

                new HashMap<String, DynObjectSet>(sel.length);

            for (int i = 0; i < sel.length; i++) {

                FLayer laCapa = sel[i];

                if (laCapa instanceof InfoByPoint) {

                    InfoByPoint layer = (InfoByPoint) laCapa;

                    DynObjectSet info = layer.getInfo(point, tolerance);

                    layer2info.put(laCapa.getName(), info);

                    numLayersInfoable++;

                }

            }

            if (numLayersInfoable == 0) {

                return;

            }

            ExtensionPointManager extensionPoints = ToolsLocator.getExtensionPointManager();

            InfoByPointRenderer renderer = (InfoByPointRenderer)extensionPoints.get(EP_INFOTOOL_NAME).create(EP_INFOTOOL_RENDERER);

            IWindow window = renderer.getPanel();

            boolean first_time = (window == null);

            renderer.resetPanel(layer2info);

            window = renderer.getPanel();

            if (window == null) {

                logger.info("Error. Unable to create info panel.");

                return;

            }

            if (first_time) {

                PluginServices.getMDIManager().addCentredWindow(window);

            } else {

                // perhaps bring to front

            }

        } catch (Exception e) {

            NotificationManager.addError("Info by Point", e);

            e.printStackTrace();

        }

    }

    public Image getImageCursor() {

        return img;

    }

    public boolean cancelDrawing() {

        return false;

    }

    public void pointDoubleClick(PointEvent event) throws BehaviorException {

        // Nothing to do

    }

    public interface InfoByPointRenderer {

       public FInfoDialog getPanel();

       public void resetPanel(Map<String, DynObjectSet> layersInfo);

    }

    public static class DefaultInfoByPointRenderer implements InfoByPointRenderer, ExtensionSingleton {

        private FInfoDialog dlgInfo = null;

        public FInfoDialog getPanel() {

            return dlgInfo;

        }

        public void resetPanel(Map<String, DynObjectSet> layersInfo) {

            // TODO: set the writable parameter to true to activate

            // edition of the info by point information.

            LayersDynObjectSetComponent infoComponent =

                MapControlLocator.getMapControlManager()

                    .createLayersDynObjectSetComponent(layersInfo, false);

            if (dlgInfo == null) {

                dlgInfo = new FInfoDialog(infoComponent);

            } else {

                dlgInfo.setInfo(infoComponent);

            }

        }

    }

}