/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package components;import javax.swing.SpinnerModel;import javax.swing.SpinnerListModel;/** * This 1.4 example is used by the various SpinnerDemos. * It implements a SpinnerListModel that works only with * an Object array and that implements cycling (the next * value and previous value are never null).  It also * lets you optionally associate a spinner model that's * linked to this one, so that when a cycle occurs the * linked spinner model is updated. * The SpinnerDemos use the CyclingSpinnerListModel for * a month spinner that (in SpinnerDemo3) is tied to the * year spinner, so that -- for example -- when the month * changes from December to January, the year increases. */public 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;    }}