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*
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*
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*
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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*/
package javademo.swing.spinner;
import javax.swing.SpinnerListModel;
import javax.swing.SpinnerModel;
/**
* 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
{
private static final long serialVersionUID = 1L;
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;
}
}