CyclingSpinnerListModel.java Source code

Introduction

Here is the source code for CyclingSpinnerListModel.java

Source

/*
 *
 * Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */

import javax.swing.JFrame;
import javax.swing.JSpinner;
import javax.swing.SpinnerListModel;
import javax.swing.SpinnerModel;

class CyclingSpinnerListModel extends SpinnerListModel {
    Object firstValue, lastValue;

    SpinnerModel linkedModel = null;

    public CyclingSpinnerListModel(Object[] values) {
        super(values);
        firstValue = values[0];
        lastValue = values[values.length - 1];
    }

    public void setLinkedModel(SpinnerModel linkedModel) {
        this.linkedModel = linkedModel;
    }

    public Object getNextValue() {
        Object value = super.getNextValue();
        if (value == null) {
            value = firstValue;
            if (linkedModel != null) {
                linkedModel.setValue(linkedModel.getNextValue());
            }
        }
        return value;
    }

    public Object getPreviousValue() {
        Object value = super.getPreviousValue();
        if (value == null) {
            value = lastValue;
            if (linkedModel != null) {
                linkedModel.setValue(linkedModel.getPreviousValue());
            }
        }
        return value;
    }
}

public class Main {

    public static void main(String[] a) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JSpinner spinner = new JSpinner(new CyclingSpinnerListModel(new String[] { "A", "B", "C" }));
        frame.add(spinner);

        frame.setSize(300, 200);
        frame.setVisible(true);
    }

}