nl.cloudfarming.client.geoviewer.render.GridCoverage2DPreviewPanel Maven / Gradle / Ivy

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AgroSense geoviewer render - contains classes for rendering of various geo objects
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/**
 * Copyright (C) 2008-2012 AgroSense Foundation.
 *
 * AgroSense 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 3 of the License, or
 * (at your option) any later version.
 *
 * There are special exceptions to the terms and conditions of the GPLv3 as it is applied to
 * this software, see the FLOSS License Exception
 * .
 *
 * AgroSense 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 AgroSense.  If not, see .
 */
package nl.cloudfarming.client.geoviewer.render;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.JPanel;
import nl.cloudfarming.client.geoviewer.Geographical;
import nl.cloudfarming.client.geoviewer.Palette;
import org.geotools.coverage.grid.GridCoverage2D;
import org.netbeans.api.visual.model.ObjectState;

/**
 * Panel which displays a GridCoverage2D object
 *
 * Uses the {@link RasterRenderer} to render the content on the
 * JPanel
 *
 * @author Timon Veenstra
 * @author Maciek Dulkiewicz
 */
public class GridCoverage2DPreviewPanel extends JPanel {

    private GridCoverage2D coverage;
    private Palette palette;
    private Geographical geographical;
    // TODO: busy state either via icon or layered panels with progress handle on top of grid
//    private JLayeredPane layeredPane = new JLayeredPane();
//    private JPanel loadingPanel;
//    private JPanel coveragePanel;    
    private PaletteListener paletteListener = new PaletteListener();
    private GeographicalListener geographicalListener = new GeographicalListener();
    
    // TODO: show legend when palette instance of LegendPalette
    // - extract superclass from nl.cloudfarming.client.geoviewer.jxmap.map.LegendPanel,
    // - move coverage painting to nested panel.

    public GridCoverage2DPreviewPanel(GridCoverage2D coverage, Palette palette) {
        this.coverage = coverage;
        this.palette = palette != null ? palette : defaultPalette();
        this.palette.addPropertyChangeListener(paletteListener);
    }

    public GridCoverage2DPreviewPanel(GridCoverage2D coverage) {
        this(coverage, defaultPalette());
    }
    
    public GridCoverage2DPreviewPanel(Geographical geographical, Palette palette) {
        this(geographical.getRenderObject(null), palette);
        this.geographical = geographical;
        this.geographical.addPropertyChangeListener(geographicalListener);
    }

    @Override
    public void paint(Graphics g) {
        RasterRenderer rasterRenderer = RasterRendererFactory.getRenderer(coverage);
        rasterRenderer.paint(coverage, getVisibleRect(), (Graphics2D) g, palette, ObjectState.createNormal(), new SimpleGeoTranslator());
        
        if (geographical != null && geographical instanceof Geographical.AsyncRenderObject){
            Geographical.AsyncRenderObject asyncRenderObject = (Geographical.AsyncRenderObject) geographical;
            if (asyncRenderObject.hasStaleRenderObject()) {
                // TODO: show hourglass / progress handle
            }
        }
    }
    
    public void setGridCoverage2D(GridCoverage2D gridCoverage) {
        this.coverage = gridCoverage;
        repaint();
    }
    
    private static Palette defaultPalette() {
        return new Palette(Color.BLACK); // renderer will use hardcoded fallback range and colors instead.
    }

    @Override
    public void removeNotify() {
        super.removeNotify();
        // clean up listeners:
        palette.removePropertyChangeListener(paletteListener);
        if (geographical != null) {
            geographical.removePropertyChangeListener(geographicalListener);
        }
    }
    
    private class PaletteListener implements PropertyChangeListener {

        @Override
        public void propertyChange(PropertyChangeEvent evt) {
           repaint();
        }
    }
    
    private class GeographicalListener implements PropertyChangeListener {

        @Override
        public void propertyChange(PropertyChangeEvent evt) {
            if (Geographical.PROP_RENDER_OBJECT.equals(evt.getPropertyName())) {
                setGridCoverage2D(geographical.getRenderObject(null));
            }
        }
    }
    
}