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package org.openoffice.accessibility.awb.view.text;
import java.lang.Integer;
import java.util.Vector;
import javax.swing.SpinnerModel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import com.sun.star.accessibility.XAccessibleText;
import com.sun.star.lang.IndexOutOfBoundsException;
/** A simple model for JSpinner objects that clips the spinner values to valid
text indices.
*/
public class CaretSpinnerModel
implements SpinnerModel
{
public CaretSpinnerModel (XAccessibleText xText)
{
mxText = xText;
maListeners = new Vector ();
}
public void addChangeListener (ChangeListener aListener)
{
if (aListener != null)
maListeners.add (aListener);
}
public void removeChangeListener (ChangeListener aListener)
{
maListeners.removeElement (aListener);
}
public Object getNextValue ()
{
if (mxText != null)
{
int nPosition = mxText.getCaretPosition();
if (nPosition+1 <= mxText.getCharacterCount())
return new Integer (nPosition+1);
}
return null;
}
public Object getPreviousValue ()
{
if (mxText != null)
{
int nPosition = mxText.getCaretPosition();
if (nPosition > 0)
return new Integer (nPosition-1);
}
return null;
}
public Object getValue ()
{
if (mxText != null)
return new Integer (mxText.getCaretPosition());
else
return null;
}
public void setValue (Object aValue)
{
if (mxText != null)
if (aValue instanceof Integer)
{
try
{
if( ((Integer)aValue).intValue() != mxText.getCaretPosition() )
mxText.setCaretPosition (((Integer)aValue).intValue());
}
catch (IndexOutOfBoundsException aException)
{
}
}
}
/** Call this method when the caret position has changes so that the model
can inform its listeners about it.
*/
public void Update ()
{
ChangeEvent aEvent = new ChangeEvent (this);
for (int i=0; i<maListeners.size(); i++)
((ChangeListener)maListeners.elementAt(i)).stateChanged (aEvent);
}
private XAccessibleText mxText;
private Integer maValue;
private Vector maListeners;
}