// **********************************************************************
//
// <copyright>
//
// BBN Technologies
// 10 Moulton Street
// Cambridge, MA 02138
// (617) 873-8000
//
// Copyright (C) BBNT Solutions LLC. All rights reserved.
//
// </copyright>
// **********************************************************************
//
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/gui/CoordPanel.java,v $
// $RCSfile: CoordPanel.java,v $
// $Revision: 1.3.2.2 $
// $Date: 2004/10/14 18:26:52 $
// $Author: dietrick $
//
// **********************************************************************
package com.bbn.openmap.gui;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.io.Serializable;
import java.text.DecimalFormat;
import javax.swing.*;
import javax.swing.border.*;
import com.bbn.openmap.LatLonPoint;
import com.bbn.openmap.event.CenterListener;
import com.bbn.openmap.event.CenterSupport;
import com.bbn.openmap.util.Debug;
import com.bbn.openmap.Environment;
import com.bbn.openmap.I18n;
/**
* CoordPanel is a simple gui with entry boxes and labels for latitude
* and longitude. It sets the center of a map with the entered
* coordinates by firing CenterEvents.
*/
public class CoordPanel extends JPanel implements Serializable {
protected transient JTextField latitude, longitude;
protected transient CenterSupport centerDelegate;
protected I18n i18n = Environment.getI18n();
protected DecimalFormat df = new DecimalFormat("0.###");
/**
* Creates the panel.
*/
public CoordPanel() {
centerDelegate = new CenterSupport(this);
makeWidgets();
}
/**
* Creates the panel.
*/
public CoordPanel(CenterSupport support) {
centerDelegate = support;
makeWidgets();
}
/**
* Creates and adds the labels and entry fields for latitude and
* longitude
*/
protected void makeWidgets() {
String locText;
GridBagLayout gridbag = new GridBagLayout();
GridBagConstraints c = new GridBagConstraints();
setLayout(gridbag);
locText = i18n.get(CoordPanel.class, "border", "Decimal Degrees");
setBorder(new TitledBorder(new EtchedBorder(), locText));
locText = i18n.get(CoordPanel.class, "latlabel", "Latitude: ");
JLabel latlabel = new JLabel(locText);
c.gridx = 0;
c.gridy = 0;
gridbag.setConstraints(latlabel, c);
add(latlabel);
latitude = new JTextField(10);
c.gridx = 1;
c.gridy = 0;
gridbag.setConstraints(latitude, c);
add(latitude);
locText = i18n.get(CoordPanel.class, "lonlabel", "Longitude: ");
JLabel lonlabel = new JLabel(locText);
c.gridx = 0;
c.gridy = 1;
gridbag.setConstraints(lonlabel, c);
add(lonlabel);
longitude = new JTextField(10);
c.gridx = 1;
c.gridy = 1;
gridbag.setConstraints(longitude, c);
add(longitude);
}
/**
* @return the LatLonPoint represented by contents of the entry
* boxes
*/
public LatLonPoint getLatLon() {
float lat, lon;
try {
lat = Float.valueOf(latitude.getText()).floatValue();
lon = Float.valueOf(longitude.getText()).floatValue();
} catch (NumberFormatException except) {
Debug.error("CoordPanel.getLatLon(): " + except.toString());
clearTextBoxes();
return null;
}
if (Debug.debugging("coordpanel")) {
Debug.output("CoordPanel.getLatLon(): lat= " + lat + ", lon= "
+ lon);
}
return (new LatLonPoint(lat, lon));
}
/**
* Sets the contents of the latitude and longitude entry boxes.
*
* @param llpoint the object containt the coordinates that should
* go in the boxes. If null, text boxes will be cleared.
*/
public void setLatLon(LatLonPoint llpoint) {
if (llpoint == null) {
clearTextBoxes();
} else {
latitude.setText("" + llpoint.getLatitude());
longitude.setText("" + llpoint.getLongitude());
}
}
/**
* Sets the center of the map to be the coordinates in the
* latitude and logitude entry boxes
*/
public boolean setCenter() {
LatLonPoint llp = getLatLon();
if (llp == null) {
return false;// invalid number
}
if (Debug.debugging("coordpanel")) {
Debug.output("CoordPanel.setCenter(): " + llp);
}
centerDelegate.fireCenter(llp.getLatitude(), llp.getLongitude());
return true;
}
protected void clearTextBoxes() {
latitude.setText("");
longitude.setText("");
}
/**
* Add a CenterListener to the listener list.
*
* @param listener The CenterListener to be added
*/
public void addCenterListener(CenterListener listener) {
centerDelegate.addCenterListener(listener);
}
/**
* Remove a CenterListener from the listener list.
*
* @param listener The CenterListener to be removed
*/
public void removeCenterListener(CenterListener listener) {
centerDelegate.removeCenterListener(listener);
}
}