package org.rosuda.JGR.toolkit;

//JGR - Java Gui for R, see http://www.rosuda.org/JGR/
//Copyright (C) 2003 - 2005 Markus Helbig
//--- for licensing information see LICENSE file in the original JGR distribution ---


import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;

import org.rosuda.JGR.*;
import org.rosuda.JGR.robjects.*;

/**
 * FunctionList - implemenation of a JList with some JGR specific features.
 * 
 * @author Markus Helbig
 *
 *	RoSuDa 2003 - 2005
 */

public class FunctionList extends JList implements KeyListener, MouseListener {

    private JGRObjectManager objmgr;
	private DefaultListModel fmodel = new DefaultListModel();

    public FunctionList(JGRObjectManager obm, Collection functions) {
        this.setModel(fmodel);
        fmodel.removeAllElements();
		Iterator i = functions.iterator();
		while (i.hasNext())
			fmodel.addElement(i.next());
        this.objmgr = obm;
        this.addMouseListener(this);
        this.addKeyListener(this);
    }

    /**
     * Refresh list and set supplied functions.
     * @param functions new functions
     */
    public void refresh(Collection functions) {
    	fmodel.removeAllElements();
		Iterator i = functions.iterator();
		while (i.hasNext())
			fmodel.addElement(i.next());
        
    }

    /**
     * mouseClicked: handle mouse event: double-click -> show function.
     */
    public void mouseClicked(MouseEvent e) {
        if (e.getClickCount()==2) {
            RObject o = null;
            try {
                o = (RObject) this.getSelectedValue();
            }
            catch (Exception ex) {
            }
            if (o != null)
                RController.newFunction(o);
        }
    }

    /**
     * mouseEntered: handle mouse event.
     */
    public void mouseEntered(MouseEvent e) {
    }

    /**
     * mouseExited: handle mouse event.
     */
    public void mouseExited(MouseEvent e) {
    }

    /**
     * mousePressed: handle mouse event.
     */
    public void mousePressed(MouseEvent e) {
        if (objmgr.summary != null)	objmgr.summary.hide();
    }

    /**
     * mouseReleased: handle mouse event.
     */
    public void mouseReleased(MouseEvent e) {
    }

    /**
     * keyTyped: handle key event.
     */
	public void keyTyped(KeyEvent e) {
	}

    /**
     * keyPressed: handle key event.
     */
	public void keyPressed(KeyEvent e) {
	}

    /**
     * keyReleased: handle key event: remove functions.
     */
	public void keyReleased(KeyEvent e) {
		if (e.getKeyCode() == KeyEvent.VK_DELETE || e.getKeyCode() == KeyEvent.VK_BACK_SPACE) {
			Object[] sfunctions = this.getSelectedValues();
			for (int i = 0; i < sfunctions.length; i++) {
				RObject o = null;
	            try {
	                o = (RObject) sfunctions[i];
	            }
	            catch (Exception ex) {
	            }
				if (o != null) {
					JGR.R.eval("rm("+o.getRName()+")");
					fmodel.removeElement(sfunctions[i]);
				}
			}
		}
	}

}