SelectionHandler.java Source code

Introduction

Here is the source code for SelectionHandler.java

Source

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;

import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class SelectionHandler implements ActionListener, ListSelectionListener {
    private JLabel direction;

    private JList source, destination;

    public SelectionHandler(JLabel d, JList left, JList right) {
        direction = d;
        source = left;
        destination = right;
    }

    public void actionPerformed(ActionEvent a) {
        JComboBox cb = (JComboBox) a.getSource();
        String selected = (String) cb.getSelectedItem();
        String current = direction.getText();
        if (!selected.equals(current)) {
            direction.setText(selected);
            JList temp = source;
            source = destination;
            destination = temp;
            source.clearSelection();
            destination.clearSelection();
        }

    }

    public void valueChanged(ListSelectionEvent e) {
        JList list = (JList) e.getSource();
        String item = (String) source.getSelectedValue();
        System.out.println(item);
        if (item != null && !item.equals("")) {
            removeFromSource(item);
            addToDestination(item);
        }
    }

    private void removeFromSource(String item) {
        ListModel model = source.getModel();
        Vector listData = new Vector();
        for (int i = 0; i < model.getSize(); i++) {
            listData.addElement(model.getElementAt(i));
        }
        listData.removeElement(item);
        source.setListData(listData);
    }

    private void addToDestination(String item) {
        ListModel model = destination.getModel();
        Vector listData = new Vector();
        for (int i = 0; i < model.getSize(); i++) {
            listData.addElement(model.getElementAt(i));
        }
        listData.addElement(item);
        destination.setListData(listData);
    }
}