/*
* Open Source Physics software is free software as described near the bottom of this code file.
*
* For additional information and documentation on Open Source Physics please see:
* <http://www.opensourcephysics.org/>
*/
package org.opensourcephysics.ejs.control.swing;
import java.text.ParsePosition;
import javax.swing.JTextField;
import org.opensourcephysics.ejs.control.value.DoubleValue;
import org.opensourcephysics.numerics.ParserException;
import org.opensourcephysics.numerics.SuryonoParser;
/**
* A textfield to display double values. When this value changes,
* it invokes both the VARIABLE_CHANGED and the ACTION actions.
*/
public class ControlParsedNumberField extends ControlNumberField {
protected SuryonoParser parser = new SuryonoParser(0);
// ------------------------------------------------
// Visual component
// ------------------------------------------------
/**
* Constructor ControlParsedNumberField
* @param _visual
*/
public ControlParsedNumberField(Object _visual) {
super(_visual);
}
protected java.awt.Component createVisual(Object _visual) {
if(_visual instanceof JTextField) {
textfield = (JTextField) _visual;
} else {
textfield = new JTextField();
}
format = defaultFormat;
defaultValue = 0.0;
defaultValueSet = false;
internalValue = new DoubleValue(defaultValue);
textfield.setText(format.format(internalValue.value));
textfield.addActionListener(new MyActionListener());
textfield.addKeyListener(new MyKeyListener());
decideColors(textfield.getBackground());
return textfield;
}
// -------------------------------------
// Private methods and inner classes
// -------------------------------------
private class MyActionListener implements java.awt.event.ActionListener {
public void actionPerformed(java.awt.event.ActionEvent _e) {
// System.out.println ("Action for "+textfield.getText());
setColor(defaultColor);
String text = textfield.getText().trim(); // remove whitespace
try {
ParsePosition parsePosition = new ParsePosition(0);
//setInternalValue(format.parse(text).doubleValue()); // change by W. Christian
setInternalValue(format.parse(text, parsePosition).doubleValue());
if(text.length()==parsePosition.getIndex()) {
return; // return only if all characters were parsed
}
} catch(Exception exc) {} // Do nothing
// see if text is a formula
try {
parser.parse(text);
setInternalValue(parser.evaluate());
return;
} catch(ParserException exc) {
setColor(errorColor);
//exc.printStackTrace(System.err);
}
}
}
} // End of class
/*
* Open Source Physics software is free software; you can redistribute
* it and/or modify it under the terms of the GNU General Public License (GPL) as
* published by the Free Software Foundation; either version 2 of the License,
* or(at your option) any later version.
* Code that uses any portion of the code in the org.opensourcephysics package
* or any subpackage (subdirectory) of this package must must also be be released
* under the GNU GPL license.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
* or view the license online at http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2007 The Open Source Physics project
* http://www.opensourcephysics.org
*/