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package com.vci.client.ui.swing;
 
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseMotionListener;
 
import javax.swing.BorderFactory;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JList;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.MenuSelectionManager;
import javax.swing.SwingUtilities;
import javax.swing.plaf.basic.ComboPopup;
import javax.swing.tree.TreePath;
 
public class TreePopup extends JPopupMenu implements ComboPopup{
 
    /**
     * 
     */
    private static final long serialVersionUID = 6071571114509174652L;
    protected JTreeComboBox comboBox;
    protected JScrollPane scrollPane;
 
    protected MouseMotionListener mouseMotionListener;
    protected MouseListener mouseListener;
    private MouseListener treeSelectListener = new MouseAdapter(){
        public void mouseReleased(MouseEvent e){
            JTree tree = (JTree)e.getSource();
            TreePath tp = tree.getPathForLocation(e.getPoint().x,
                                                  e.getPoint().y);
            if(tp == null){
                return;
            }
            comboBox.setSelectedItem(tp);
            togglePopup();
            MenuSelectionManager.defaultManager().clearSelectedPath();
        }
    };
 
    public TreePopup(JComboBox comboBox){
        this.comboBox = (JTreeComboBox)comboBox;
        setBorder(BorderFactory.createLineBorder(Color.black));
        setLayout(new BorderLayout());
        setLightWeightPopupEnabled(comboBox.isLightWeightPopupEnabled());
        JTree tree = this.comboBox.getTree();
        if(tree != null){
            scrollPane = new JScrollPane(tree);
            scrollPane.setBorder(null);
            add(scrollPane, BorderLayout.CENTER);
            tree.addMouseListener(treeSelectListener);
        }
    }
 
    public void show(){
        updatePopup();
        show(comboBox, 0, comboBox.getHeight());
        comboBox.getTree().requestFocus();
    }
 
    public void hide(){
        setVisible(false);
        comboBox.firePropertyChange("popupVisible", true, false);
    }
 
    protected JList list = new JList();
    public JList getList(){
        return list;
    }
 
    public MouseMotionListener getMouseMotionListener(){
        if(mouseMotionListener == null){
            mouseMotionListener = new MouseMotionAdapter(){};
        }
        return mouseMotionListener;
    }
 
    public KeyListener getKeyListener(){
        return null;
    }
 
    public void uninstallingUI(){}
 
    /**
     * Implementation of ComboPopup.getMouseListener().
     *
     * @return a <code>MouseListener</code> or null
     * @see ComboPopup#getMouseListener
     */
    public MouseListener getMouseListener(){
        if(mouseListener == null){
            mouseListener = new InvocationMouseHandler();
        }
        return mouseListener;
    }
 
    protected void togglePopup(){
        if(isVisible()){
            hide();
        } else{
            show();
        }
    }
 
    protected void updatePopup(){
        setPreferredSize(new Dimension(comboBox.getSize().width, 200));
        Object selectedObj = comboBox.getSelectedItem();
        if(selectedObj != null){
            TreePath tp = (TreePath)selectedObj;
            ((JTreeComboBox)comboBox).getTree().setSelectionPath(tp);
        }
    }
 
    protected class InvocationMouseHandler extends MouseAdapter{
        public void mousePressed(MouseEvent e){
            if(!SwingUtilities.isLeftMouseButton(e) || !comboBox.isEnabled()){
                return;
            }
            if(comboBox.isEditable()){
                Component comp = comboBox.getEditor().getEditorComponent();
                if((!(comp instanceof JComponent)) ||
                   ((JComponent)comp).isRequestFocusEnabled()){
                    comp.requestFocus();
                }
            } else if(comboBox.isRequestFocusEnabled()){
                comboBox.requestFocus();
            }
            togglePopup();
        }
    }
}