import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.ListSelectionListener;
import java.util.EventListener;
import javax.swing.event.ListSelectionEvent;
public class NewList extends JList implements ListSelectionListener
{
int sel[];
boolean manualset;
public void setSelectedIndices(int a[])
{
manualset=true;
System.out.println("NewList.setSelectedIndices");
if(a!=null)
super.setSelectedIndices(a);
else
this.clearSelection();
sel = a;
}
public NewList()
{
addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent me)
{
if(me.getClickCount()<2)
return;
JList list = (JList) me.getSource();
int index = list.locationToIndex(me.getPoint());
int oldsel[]=list.getSelectedIndices();
int newsel[];
if(list.isSelectedIndex(index))
{
//list.setSelectedIndices(int[] indices)
newsel=new int[oldsel.length-1];
int j=0;
for(int i=0;i<oldsel.length;i++)
{
if(oldsel[i]!=index)
{
newsel[j]=oldsel[i];
j++;
}
}
}
else
{
newsel=new int[oldsel.length+1];
if(oldsel.length>0)
System.arraycopy(oldsel,0,newsel,0,oldsel.length);
newsel[oldsel.length]=index;
}
list.setSelectedIndices(newsel);
Rectangle rect = list.getCellBounds(index, index);
list.repaint(rect);
}
});
addListSelectionListener(this);
}
public static void main(String args[])
{
JFrame frame=new JFrame("new list test");
NewList newlist=new NewList();
String[] listdata={"item1","item2","item3"};
newlist.setListData(listdata);
frame.getContentPane().add(newlist);
frame.setSize(400,400);
frame.setVisible(true);
frame.show();
}
boolean reset=false;
public void valueChanged(ListSelectionEvent e)
{
if(reset==true)
{
return;
}
reset=true;
if(!manualset)
{
if(sel!=null)
super.setSelectedIndices(sel);
else
clearSelection();
}
manualset=false;
reset=false;
//System.out.println("valueChanged");
}
}
