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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.Converter;
/*
* Works in 1.1+Swing, 1.4, and all releases in between.
* Used by the Converter example.
*/
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/**
* Implements a model whose data is actually in another model (the
* "source model"). The follower model adjusts the values obtained
* from the source model (or set in the follower model) to be in
* a different unit of measure.
*
*/
public class FollowerRangeModel extends ConverterRangeModel implements ChangeListener
{
ConverterRangeModel sourceModel; // the real model
/** Creates a FollowerRangeModel that gets its state from sourceModel. */
public FollowerRangeModel(ConverterRangeModel sourceModel)
{
this.sourceModel = sourceModel;
sourceModel.addChangeListener(this);
}
// The only method in the ChangeListener interface.
public void stateChanged(ChangeEvent e)
{
fireStateChanged();
}
public int getMaximum()
{
int modelMax = sourceModel.getMaximum();
double multiplyBy = sourceModel.getMultiplier() / this.getMultiplier();
return (int)(modelMax * multiplyBy);
}
public void setMaximum(int newMaximum)
{
sourceModel.setMaximum((int)(newMaximum * (this.getMultiplier() / sourceModel.getMultiplier())));
}
public int getValue()
{
return (int)getDoubleValue();
}
public void setValue(int newValue)
{
setDoubleValue((double)newValue);
}
public double getDoubleValue()
{
return sourceModel.getDoubleValue() * sourceModel.getMultiplier() / this.getMultiplier();
}
public void setDoubleValue(double newValue)
{
sourceModel.setDoubleValue(newValue * this.getMultiplier() / sourceModel.getMultiplier());
}
public int getExtent()
{
return super.getExtent();
}
public void setExtent(int newExtent)
{
super.setExtent(newExtent);
}
public void setRangeProperties(int value, int extent, int min, int max, boolean adjusting)
{
double multiplyBy = this.getMultiplier() / sourceModel.getMultiplier();
sourceModel.setRangeProperties(value * multiplyBy, extent, min, (int)(max * multiplyBy), adjusting);
}
}