gliderworldwindow.java

来自「world wind java sdk 源码」· Java 代码 · 共 132 行

/*
Copyright (C) 2001, 2008 United States Government
as represented by the Administrator of the
National Aeronautics and Space Administration.
All Rights Reserved.
*/

package gov.nasa.worldwind.applications.glider;

import gov.nasa.worldwind.avlist.AVKey;
import gov.nasa.worldwind.awt.WorldWindowGLCanvas;
import gov.nasa.worldwind.examples.ApplicationTemplate;
import gov.nasa.worldwind.layers.Layer;
import gov.nasa.worldwind.util.Logging;

import java.beans.*;
import java.io.IOException;
import java.util.*;
import java.util.concurrent.CopyOnWriteArraySet;

/**
 * View class to support GLIDER program. This class is internal to the Eclipse RCP implementation of EarthView in the
 * GLIDER source.
 *
 * @author tag
 * @version $Id: GliderWorldWindow.java 9226 2009-03-06 03:42:35Z tgaskins $
 */
public class GliderWorldWindow extends WorldWindowGLCanvas
{
    protected CopyOnWriteArraySet<GliderImage> imageTable = new CopyOnWriteArraySet<GliderImage>();
    protected LayerListener layerListener = new LayerListener();

    /**
     * Adds an image to display on the globe.
     *
     * @param image the image to display
     *
     * @throws IllegalArgumentException if <code>image</code> is null.
     * @throws IOException              if the image cannot be opened.
     */
    public void addImage(GliderImage image) throws IOException
    {
        if (image == null)
        {
            String message = Logging.getMessage("nullValue.ImageIsNull");
            Logging.logger().severe(message);
            throw new IllegalArgumentException(message);
        }

        if (this.imageTable.contains(image))
            this.removeImage(image);

        GliderImageLayer layer = new GliderImageLayer();

        image.setValue(AVKey.LAYER, layer);
        layer.setImage(image);
        ApplicationTemplate.insertBeforeCompass(this, layer);

        layer.addPropertyChangeListener(this.layerListener);

        this.imageTable.add(image);

        this.firePropertyChange(GliderImage.GLIDER_IMAGE_SOURCE, null, image);

        this.repaint();
    }

    /**
     * Removes a specified image from the globe.
     *
     * @param image the image to remove.
     *
     * @throws IllegalArgumentException if <code>image</code> is null.
     */
    public void removeImage(GliderImage image)
    {
        if (image == null)
        {
            String message = Logging.getMessage("nullValue.ImageIsNull");
            Logging.logger().severe(message);
            throw new IllegalArgumentException(message);
        }

        this.imageTable.remove(image);

        Layer layer = (Layer) image.getValue(AVKey.LAYER);
        if (layer != null)
        {
            layer.removePropertyChangeListener(this.layerListener);
            this.getModel().getLayers().remove(layer);
            layer.dispose();
        }

        this.firePropertyChange(GliderImage.GLIDER_IMAGE_SOURCE, null, image);

        this.repaint();
    }

    /**
     * Returns the set of currently associated images.
     *
     * @return the set of currently associated images. The returned set is not modifiable and cannot be used to
     *         associate or disassociate an image.
     */
    public Set<GliderImage> getImages()
    {
        return Collections.unmodifiableSet(this.imageTable);
    }

    /**
     * Indicates whether a specified image is associated.
     *
     * @param image the image in question.
     *
     * @return <code>true</code> if the image is associated, <code>false</code> if not or if <code>image</code> is
     *         null.
     */
    public boolean containsImage(GliderImage image)
    {
        return image != null && this.imageTable.contains(image);
    }

    protected class LayerListener implements PropertyChangeListener
    {
        public void propertyChange(PropertyChangeEvent evt)
        {
            GliderWorldWindow.this.firePropertyChange(GliderImage.GLIDER_IMAGE_SOURCE, null, this);
            GliderWorldWindow.this.repaint();
        }
    }
}