ConditionedProperty.java

/*******************************************************************************
 * Copyright (c) 2003-2005, 2013 Till Zoppke.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Till Zoppke - initial API and implementation
 ******************************************************************************/
/*
 * Created on 21.12.2003
 *
 * To change the template for this generated file go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
package eniac.property;

import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;

import javax.swing.JComponent;
import javax.swing.JTextField;

/**
 * @author zoppke
 * 
 *         To change the template for this generated type comment go to Window -
 *         Preferences - Java - Code Generation - Code and Comments
 */
public abstract class ConditionedProperty extends Property {

	private String _value;

	private JTextField _field;

	public ConditionedProperty(String name, String value) {
		_name = name;
		_value = value;
	}

	public String getValue() {
		setValue(_field.getText());
		return _value;
	}

	public void setValue(String value) {
		if (checkValue(value)) {
			_value = value;
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see eniac.data.property.AbstractProperty#getValueComponent()
	 */
	public JComponent getValueComponent() {
		_field = new JTextField(_value);
		_field.addFocusListener(new FocusAdapter() {
			public void focusLost(FocusEvent e) {
				lostFocus();
			}
		});
		return _field;
	}

	protected abstract boolean checkValue(String value);

	void lostFocus() {
		setValue(_field.getText());
		_field.setText(_value);
	}
}