graticulelayer.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, a Verizon Company
// 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/GraticuleLayer.java,v $
// $RCSfile: GraticuleLayer.java,v $
// $Revision: 1.7.2.6 $
// $Date: 2005/08/09 18:10:43 $
// $Author: dietrick $
//
// **********************************************************************

// Modified 28 September 2002 by David N. Allsopp to allow font size
// to be changed. See sections commented with 'DNA'.

package com.bbn.openmap.layer;

import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Properties;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JPanel;

import com.bbn.openmap.Environment;
import com.bbn.openmap.I18n;
import com.bbn.openmap.LatLonPoint;
import com.bbn.openmap.MoreMath;
import com.bbn.openmap.event.ProjectionEvent;
import com.bbn.openmap.omGraphics.OMGraphic;
import com.bbn.openmap.omGraphics.OMGraphicList;
import com.bbn.openmap.omGraphics.OMPoly;
import com.bbn.openmap.omGraphics.OMText;
import com.bbn.openmap.proj.Cylindrical;
import com.bbn.openmap.proj.Projection;
import com.bbn.openmap.util.Debug;
import com.bbn.openmap.util.PaletteHelper;
import com.bbn.openmap.util.PropUtils;

/**
 * Layer that draws graticule lines. If the showRuler property is set
 * to true, then longitude values are displayed on the bottom of the
 * map, and latitude values are displayed on the left side. If the
 * show1And5Lines property is true, then 5 degree lines are drawn when
 * there are &lt;= threshold ten degree latitude or longitude lines,
 * and 1 degree lines are drawn when there are &lt;= threshold five
 * degree latitude or longitude degree lines.
 * 
 * <P>
 * The openmap.properties file can control the layer with the
 * following settings: <code><pre>
 * 
 *  
 *   # Show lat / lon spacing labels
 *   graticule.showRuler=true
 *   graticule.show1And5Lines=true
 *   # Controls when the five degree lines and one degree lines kick in
 *   #- when there is less than the threshold of ten degree lat or lon
 *   #lines, five degree lines are drawn. The same relationship is there
 *   #for one to five degree lines.
 *   graticule.threshold=2
 *   # the color of 10 degree spacing lines (Hex ARGB)
 *   graticule.10DegreeColor=FF000000
 *   # the color of 5 degree spacing lines (Hex ARGB)
 *   graticule.5DegreeColor=C7009900
 *   # the color of 1 degree spacing lines (Hex ARGB)
 *   graticule.1DegreeColor=C7003300
 *   # the color of the equator (Hex ARGB)
 *   graticule.equatorColor=FFFF0000
 *   # the color of the international dateline (Hex ARGB)
 *   graticule.datelineColor=7F000099
 *   # the color of the special lines (Hex ARGB)
 *   graticule.specialLineColor=FF000000
 *   # the color of the labels (Hex ARGB)
 *   graticule.textColor=FF000000
 *   
 *  
 * </pre></code> In addition, you can get this layer to work with the
 * OpenMap viewer by editing your openmap.properties file: <code><pre>
 * 
 *  
 *   # layers
 *   openmap.layers=graticule ...
 *   # class
 *   graticule.class=com.bbn.openmap.layer.GraticuleLayer
 *   # name
 *   graticule.prettyName=Graticule
 *   
 *  
 * </pre></code>
 *  
 */
public class GraticuleLayer extends OMGraphicHandlerLayer implements
        ActionListener {

    protected I18n i18n = Environment.getI18n();
    // default to not showing the ruler (mimicing older
    // GraticuleLayer)
    protected boolean defaultShowRuler = true;
    protected boolean defaultShowOneAndFiveLines = true;
    protected boolean defaultShowBelowOneLines = false;
    protected int defaultThreshold = 2;

    /**
     * Flag for lineType - true is LINETYPE_STRAIGHT, false is
     * LINETYPE_GREATCIRCLE.
     */
    protected boolean boxy = true;
    /**
     * Threshold is the total number of ten lines on the screen before
     * the five lines appear, and the total number of five lines on
     * the screen before the one lines appear.
     */
    protected int threshold = defaultThreshold;
    /** The ten degree latitude and longitude lines, premade. */
    protected OMGraphicList tenDegreeLines = null;
    /** The equator, dateline and meridian lines, premade. */
    protected OMGraphicList markerLines = null;

    private final static int SHOW_TENS = 0;
    private final static int SHOW_FIVES = 1;
    private final static int SHOW_ONES = 2;

    protected boolean showOneAndFiveLines = defaultShowOneAndFiveLines;
    protected boolean showBelowOneLines = defaultShowBelowOneLines;
    protected boolean showRuler = defaultShowRuler;

    // protected Font font = new Font("Helvetica",
    // java.awt.Font.PLAIN, 10);
    protected Font font = null;
    protected int fontSize = 10;

    // Color variables for different line types
    protected Color tenDegreeColor = null;
    protected Color fiveDegreeColor = null;
    protected Color oneDegreeColor = null;
    protected Color belowOneDegreeColor = null;
    protected Color equatorColor = null;
    protected Color dateLineColor = null;
    protected Color specialLineColor = null; // Tropic of Cancer,
    // Capricorn
    protected Color textColor = null;

    // Default colors to use, if not specified in the properties.
    protected String defaultTenDegreeColorString = "000000";
    protected String defaultFiveDegreeColorString = "33009900";
    protected String defaultOneDegreeColorString = "33003300";
    protected String defaultBelowOneDegreeColorString = "9900ff00";
    protected String defaultEquatorColorString = "990000";
    protected String defaultDateLineColorString = "000099";
    protected String defaultSpecialLineColorString = "000000";
    protected String defaultTextColorString = "000000";

    // property text values
    public static final String TenDegreeColorProperty = "10DegreeColor";
    public static final String FiveDegreeColorProperty = "5DegreeColor";
    public static final String OneDegreeColorProperty = "1DegreeColor";
    public static final String BelowOneDegreeColorProperty = "Below1DegreeColor";
    public static final String EquatorColorProperty = "equatorColor";
    public static final String DateLineColorProperty = "datelineColor";
    public static final String SpecialLineColorProperty = "specialLineColor";
    public static final String TextColorProperty = "textColor";
    public static final String ThresholdProperty = "threshold";
    public static final String ShowRulerProperty = "showRuler";
    public static final String ShowOneAndFiveProperty = "show1And5Lines";
    public static final String ShowBelowOneProperty = "showBelow1Lines";
    public static final String FontSizeProperty = "fontSize"; //DNA

    /**
     * Construct the GraticuleLayer.
     */
    public GraticuleLayer() {
        // precalculate for boxy
        boxy = true;
        setName("Graticule");
    }

    /**
     * The properties and prefix are managed and decoded here, for the
     * standard uses of the GraticuleLayer.
     * 
     * @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);
        prefix = PropUtils.getScopedPropertyPrefix(prefix);

        tenDegreeColor = PropUtils.parseColorFromProperties(properties, prefix
                + TenDegreeColorProperty, defaultTenDegreeColorString);

        fiveDegreeColor = PropUtils.parseColorFromProperties(properties, prefix
                + FiveDegreeColorProperty, defaultFiveDegreeColorString);

        oneDegreeColor = PropUtils.parseColorFromProperties(properties, prefix
                + OneDegreeColorProperty, defaultOneDegreeColorString);

        belowOneDegreeColor = PropUtils.parseColorFromProperties(properties,
                prefix + BelowOneDegreeColorProperty,
                defaultBelowOneDegreeColorString);

        equatorColor = PropUtils.parseColorFromProperties(properties, prefix
                + EquatorColorProperty, defaultEquatorColorString);

        dateLineColor = PropUtils.parseColorFromProperties(properties, prefix
                + DateLineColorProperty, defaultDateLineColorString);

        specialLineColor = PropUtils.parseColorFromProperties(properties,
                prefix + SpecialLineColorProperty,
                defaultSpecialLineColorString);

        textColor = PropUtils.parseColorFromProperties(properties, prefix
                + TextColorProperty, defaultTextColorString);

        threshold = PropUtils.intFromProperties(properties, prefix
                + ThresholdProperty, defaultThreshold);

        fontSize = PropUtils.intFromProperties(properties, prefix
                + FontSizeProperty, fontSize);

        font = new Font("Helvetica", java.awt.Font.PLAIN, fontSize);

        setShowOneAndFiveLines(PropUtils.booleanFromProperties(properties,
                prefix + ShowOneAndFiveProperty,
                defaultShowOneAndFiveLines));

        setShowBelowOneLines(PropUtils.booleanFromProperties(properties, prefix
                + ShowBelowOneProperty, defaultShowBelowOneLines));

        setShowRuler(PropUtils.booleanFromProperties(properties, prefix
                + ShowRulerProperty, defaultShowRuler));

        // So they will get re-created.
        tenDegreeLines = null;
        markerLines = null;
    }

    protected JCheckBox showRulerButton = null;
    protected JCheckBox show15Button = null;
    protected JCheckBox showBelow1Button = null;

    public void setShowOneAndFiveLines(boolean set) {
        showOneAndFiveLines = set;
        if (show15Button != null) {
            show15Button.setSelected(set);
        }
    }

    public void setShowBelowOneLines(boolean set) {
        showBelowOneLines = set;
        if (showBelow1Button != null) {
            showBelow1Button.setSelected(set);
        }
    }

    public boolean getShowOneAndFiveLines() {
        return showOneAndFiveLines;
    }

    public boolean getShowBelowOneLines() {
        return showBelowOneLines;
    }

    public void setShowRuler(boolean set) {
        showRuler = set;
        if (showRulerButton != null) {
            showRulerButton.setSelected(set);
        }
    }

    public boolean getShowRuler() {
        return showRuler;
    }

    /**
     * The properties and prefix are managed and decoded here, for the
     * standard uses of the GraticuleLayer.
     * 
     * @param properties the properties set in the properties file.
     */
    public Properties getProperties(Properties properties) {
        properties = super.getProperties(properties);

        String prefix = PropUtils.getScopedPropertyPrefix(this);
        String colorString;

        if (tenDegreeColor == null) {
            colorString = defaultTenDegreeColorString;
        } else {
            colorString = Integer.toHexString(tenDegreeColor.getRGB());
        }
        properties.put(prefix + TenDegreeColorProperty, colorString);

        if (fiveDegreeColor == null) {
            colorString = defaultFiveDegreeColorString;
        } else {
            colorString = Integer.toHexString(fiveDegreeColor.getRGB());
        }
        properties.put(prefix + FiveDegreeColorProperty, colorString);

        if (oneDegreeColor == null) {
            colorString = defaultOneDegreeColorString;
        } else {
            colorString = Integer.toHexString(oneDegreeColor.getRGB());