/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotools.swing.wizard;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JComponent;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import org.geotools.data.Parameter;
import org.geotools.swing.wizard.JWizard.Controller;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.io.WKTReader;
import com.vividsolutions.jts.io.WKTWriter;
/**
* Text field for filling in a Geometry parameter using WKT.
*
*
*
*
* @source $URL$
*/
public class JGeometryField extends ParamField {
private JTextArea text;
public JGeometryField(Parameter<?> parameter) {
super(parameter);
}
public JComponent doLayout() {
text = new JTextArea(40, 3);
text.addKeyListener(new KeyAdapter() {
public void keyReleased(KeyEvent e) {
validate();
}
});
text.setWrapStyleWord(true);
JScrollPane scroll = new JScrollPane(text, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
scroll.setPreferredSize(new Dimension(400, 80));
return scroll;
}
public Object getValue() {
WKTReader reader = new WKTReader();
String wkt = text.getText();
if (wkt.length() == 0) {
return null;
}
try {
return reader.read(wkt);
} catch (Throwable eek) {
return null;
}
}
/**
* Determine the number of dimensions based on the CRS metadata.
*
* @return Number of dimensions expected based on metadata, default of 2
*/
int getD() {
try {
CoordinateReferenceSystem crs = (CoordinateReferenceSystem) parameter.metadata
.get(Parameter.CRS);
if (crs == null) {
return 2;
} else {
return crs.getCoordinateSystem().getDimension();
}
} catch (Throwable t){
return 2;
}
}
public void setValue(Object value) {
Geometry geom = (Geometry) value;
WKTWriter writer = new WKTWriter(getD());
String wkt = writer.write(geom);
text.setText(wkt);
}
public void addListener(Controller controller) {
text.addKeyListener(controller);
}
public void removeListener(Controller controller) {
text.addKeyListener(controller);
}
public boolean validate() {
WKTReader reader = new WKTReader();
String wkt = text.getText();
if (wkt.length() == 0) {
return true;
}
try {
Geometry geom = reader.read(wkt);
if (parameter.type.isInstance(geom)) {
text.setToolTipText(null);
text.setForeground(Color.BLACK);
return true;
} else {
text.setToolTipText("Could not use " + geom.getClass() + " as " + parameter.type);
text.setForeground(Color.RED);
return false;
}
} catch (Throwable eek) {
text.setToolTipText(eek.getLocalizedMessage());
text.setForeground(Color.RED);
return false;
}
}
}