dtedcoveragelayer.java

openmap java写的开源数字地图程序. 用applet实现,可以像google map 那样放大缩小地图.

// **********************************************************************
// 
// <copyright>
// 
//  BBN Technologies
//  10 Moulton Street
//  Cambridge, MA 02138
//  [phone]
// 
//  Copyright (C) BBNT Solutions LLC. All rights reserved.
// 
// </copyright>
// **********************************************************************
// 
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/layer/dted/DTEDCoverageLayer.java,v $
// $RCSfile: DTEDCoverageLayer.java,v $
// $Revision: 1.3.2.2 $
// $Date: 2004/10/14 18:27:03 $
// $Author: dietrick $
// 
// **********************************************************************

package com.bbn.openmap.layer.dted;

/*  Java Core  */
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JCheckBox;
import javax.swing.Box;

/*  OpenMap  */
import com.bbn.openmap.layer.OMGraphicHandlerLayer;
import com.bbn.openmap.omGraphics.OMGraphicList;
import com.bbn.openmap.proj.Projection;
import com.bbn.openmap.util.Debug;
import com.bbn.openmap.util.PropUtils;

/**
 * This is a Layer that provides coverage information on the DTED
 * data. The layer really uses the properties passed in to it to
 * determine which directories should be scanned for the data, and
 * where to locate a coverage file. If a coverage file is not
 * available, the layer will take the time to scan the directories and
 * create one, placing it in the desired location (as specified in the
 * properties). There is a palette for this layer, that lets you turn
 * off the coverage for different levels of DTED. Right now, only
 * level 0, 1 and 2 are handled.
 * 
 * <pre>
 * 
 *  The properties for this file are:
 *  
 *  # Java DTED properties
 *  dtedcov.class=com.bbn.openmap.layer.dted.DTEDCoverageLayer
 *  dtedcov.prettyName=DTED Coverage
 *  # This property should reflect the paths to the RPF directories
 *  #jdted.paths=/tmp/data/dted
 *  dtedcov.paths=/usr/local/matt/data/dted /cdrom/cdrom0/dted
 *  #DTED Level 2 data!
 *  dtedcov.level2.paths=/net/blatz/u5/DTEDLV2
 *  # Number between 0-255: 0 is transparent, 255 is opaque
 *  dtedcov.opaque=255
 *  dtedcov.coverageFile=/usr/local/matt/data/dted/coverage.dat
 *  # option ----
 *  #dtedcov.coverageURL=http://location.of.coverage.file
 *  #Default is true, don't need this entry if you like it...
 *  dtedcov.level0.showcov=true
 *  #Default colors don't need this entry
 *  dtedcov.level0.color=CE4F3F
 *  #Default is true, don't need this entry if you like it...
 *  dtedcov.level1.showcov=true
 *  #Default colors don't need this entry
 *  dtedcov.level1.color=339159
 *  #Default is true, don't need this entry if you like it...
 *  dtedcov.level2.showcov=true
 *  #Default colors don't need this entry
 *  dtedcov.level2.color=0C75D3
 *  
 * </pre>
 */
public class DTEDCoverageLayer extends OMGraphicHandlerLayer implements
        ActionListener {

    /** The graphic list of objects to draw. */
    protected OMGraphicList[] omGraphics;
    /** The paths to the DTED directories, telling where the data is. */
    protected String[] paths;
    /**
     * The paths to the DTED Level 2 directories, telling where the
     * data is.
     */
    protected String[] paths2;

    /** Flag to tell the cache to return the coverage for level 0 dted. */
    protected boolean showDTEDLevel0;
    /** Flag to tell the cache to return the coverage for level 1 dted. */
    protected boolean showDTEDLevel1;
    /** Flag to tell the cache to return the coverage for level 0 dted. */
    protected boolean showDTEDLevel2;

    /** The color to outline the shapes for level 0. */
    protected Color level0Color;
    /** The color to outline the shapes for level 1. */
    protected Color level1Color;
    /** The color to outline the shapes for level 2. */
    protected Color level2Color;

    /**
     * A setting for how transparent to make the images. The default
     * is 255, which is totally opaque.
     */
    protected int opaqueness;
    /** Flag to fill the coverage rectangles. */
    protected boolean fillRects;
    /*
     * Location of coverage summary file. If it doesn't exists, one
     * will be created here for later use.
     */
    protected String coverageFile = null;

    /**
     * Location of coverage summary file, if supplied as a URL. If it
     * doesn't exists, a coverage file will be used instead.
     */
    protected String coverageURL = null;

    protected DTEDCoverageManager coverageManager = null;

    private static final String showLevel0Command = "showLevel0";
    private static final String showLevel1Command = "showLevel1";
    private static final String showLevel2Command = "showLevel2";

    /** The property describing the locations of level 0 and 1 data. */
    public static final String DTEDPathsProperty = "paths";
    /** The property describing the locations of level 2 data. */
    public static final String DTED2PathsProperty = "level2.paths";

    /** Property setting to show level 0 data on startup. */
    public static final String ShowLevel0Property = "level0.showcov";
    /**
     * Property to use to change the color for coverage of level 0
     * data.
     */
    public static final String Level0ColorProperty = "level0.color";

    /** Property setting to show level 1 data on startup. */
    public static final String ShowLevel1Property = "level1.showcov";
    /**
     * Property to use to change the color for coverage of level 1
     * data.
     */
    public static final String Level1ColorProperty = "level1.color";

    /** Property setting to show level 2 data on startup. */
    public static final String ShowLevel2Property = "level2.showcov";
    /**
     * Property to use to change the color for coverage of level 2
     * data.
     */
    public static final String Level2ColorProperty = "level2.color";
    /** Property to use for filled rectangles (when java supports it). */
    public static final String OpaquenessProperty = "opaque";
    /** Property to use to fill rectangles. */
    public static final String FillProperty = "fill";
    /**
     * The file to read/write coverage summary. If it doesn't exist
     * here, it will be created and placed here.
     */
    public static final String CoverageFileProperty = "coverageFile";
    /**
     * A URL to read coverage summary. If it doesn't exist, the
     * coverage file will be tried.
     */
    public static final String CoverageURLProperty = "coverageURL";

    /**
     * The default constructor for the Layer. All of the attributes
     * are set to their default values.
     */
    public DTEDCoverageLayer() {
        setProjectionChangePolicy(new com.bbn.openmap.layer.policy.ListResetPCPolicy(this));
    }

    /** Method that sets all the variables to the default values. */
    protected void setDefaultValues() {
        paths = null;
        paths2 = null;

        showDTEDLevel0 = true;
        showDTEDLevel1 = true;
        showDTEDLevel2 = true;
        opaqueness = DTEDFrameColorTable.DEFAULT_OPAQUENESS;
        fillRects = false;
    }

    /**
     * Set all the DTED properties from a properties object.
     * 
     * @param prefix string prefix used in the properties file for
     *        this layer.
     * @param properties the properties set in the properties file.
     */
    public void setProperties(String prefix, java.util.Properties properties) {

        super.setProperties(prefix, properties);
        setDefaultValues();

        prefix = PropUtils.getScopedPropertyPrefix(prefix);

        paths = PropUtils.initPathsFromProperties(properties, prefix