Application: gvSIG desktop

package org.gvsig.raster.app.mainplugin;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.ComponentAdapter;

import java.awt.event.ComponentEvent;

import javax.swing.JComponent;

import javax.swing.SwingUtilities;

import javax.swing.event.AncestorEvent;

import javax.swing.event.AncestorListener;

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

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

import org.gvsig.fmap.mapcontext.raster.api.RasterLayer;

import org.gvsig.propertypage.PropertiesPage;

import org.gvsig.raster.lib.buffer.api.statistics.Statistics;

import org.gvsig.raster.swing.buffer.RasterSwingBufferLocator;

import org.gvsig.raster.swing.buffer.RasterSwingBufferManager;

import org.gvsig.raster.swing.buffer.statistics.StatisticsPanel;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.i18n.I18nManager;

/**

 * @author fdiaz

 *

 */

public class StatisticsPage extends javax.swing.JPanel implements PropertiesPage {

    /**

     *

     */

    private static final long serialVersionUID = 8264136278039978040L;

    private StatisticsPanel panel;

    private RasterLayer layer;

    private Thread updateStatisticsThread;

    /**

     * @param layer

     */

    public StatisticsPage(RasterLayer layer) {

        this.layer = layer;

        initializePanel();

    }

    private void initializePanel(){

        if (this.panel == null) {

            RasterSwingBufferManager manager = RasterSwingBufferLocator.getSwingManager();

            panel = manager.createStatisticsPanel();

            final LayerListener layerListener = new LayerListener() {

                @Override

                public void visibilityChanged(LayerEvent arg0) {

                    //Do nothing

                }

                @Override

                public void nameChanged(LayerEvent arg0) {

                    //Do nothing

                }

                @Override

                public void editionChanged(LayerEvent arg0) {

                    //Do nothing

                }

                @Override

                public void drawValueChanged(LayerEvent arg0) {

                    if(asJComponent().isVisible()){

                        updateStatisticsPanel();

                    }

                }

                @Override

                public void activationChanged(LayerEvent arg0) {

                    //Do nothing

                }

            };

            layer.addLayerListener(layerListener);

            this.asJComponent().addAncestorListener(new AncestorListener() {

                @Override

                public void ancestorRemoved(AncestorEvent event) {

                    layer.removeLayerListener(layerListener);

                }

                @Override

                public void ancestorMoved(AncestorEvent event) {

                    //Do nothing

                }

                @Override

                public void ancestorAdded(AncestorEvent event) {

                    layer.addLayerListener(layerListener);

                    updateStatisticsPanel();

                }

            });

            updateStatisticsPanel();

//            panel.set(this.layer.getStatistics(null));

            panel.addActionListener(new ActionListener() {

                @Override

                public void actionPerformed(ActionEvent e) {

                    if(e.getActionCommand().equalsIgnoreCase("_recalculate_statistics")){

                        layer.recalculateStatistics();

                        updateStatisticsPanel();

                    }

                }

            });

        }

    }

    @Override

    public JComponent asJComponent() {

        if (this.panel == null) {

            initializePanel();

        }

        return (JComponent)this.panel;

    }

    @Override

    public String getTitle() {

        I18nManager i18nManager = ToolsLocator.getI18nManager();

        return i18nManager.getTranslation("_statistics");

    }

    @Override

    public int getPriority() {

        return 500;

    }

    @Override

    public boolean whenAccept() {

        return true;

    }

    @Override

    public boolean whenApply() {

        return true;

    }

    @Override

    public boolean whenCancel() {

        return true;

    }

    /**

     *

     */

    private synchronized void updateStatisticsPanel() {

        if( updateStatisticsThread!=null ) {

            return;

        }

        this.updateStatisticsThread = new Thread(new Runnable() {

            @Override

            public void run() {

                final Statistics statistics = layer.getStatistics(null);

                SwingUtilities.invokeLater(new Runnable() {

                    @Override

                    public void run() {

                        panel.set(statistics);

                    }

                });

                updateStatisticsThread = null;

            }

        }, "Calculate statistics");

        updateStatisticsThread.setDaemon(false);

        updateStatisticsThread.start();

    }

}