/* gui to insert/delete from avl tree of integers, use with BST, BSTgraph 
2017 version
*/

import javax.swing.*;
import java.awt.*;
import java.awt.Graphics;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class avlgui extends JFrame implements ActionListener
{
    public JTextField ifd, dfd;    // single line editible area
    public JLabel il, dl;
    Bst<Integer> Tree;
    Bstgraph TG; // = new Bstgraph(1024,668);

    public avlgui(Bst<Integer> tr)
    {
	Tree = tr;
        ifd = new JTextField(4);
        dfd = new JTextField(4);
	il = new JLabel("Insert:");
	dl = new JLabel("Delete:");
	Container pane = this.getContentPane();
	pane.setLayout(new FlowLayout());
	pane.add(il);  pane.add(ifd);
	pane.add(dl);  pane.add(dfd);
	ifd.addActionListener(this);
	dfd.addActionListener(this);
	this.setBounds(924,600,120,100);
        this.setVisible(true);
        this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
	
      	TG = new Bstgraph(1024,660);
	TG.requestFocus();	
	TG.drawtree(Tree);
        try{Thread.sleep(400);} catch(Exception e) {} 
	this.ifd.requestFocus();
    } // constructor

    public void actionPerformed(ActionEvent e) 
    { 
	try {
	    String m = null;
	    vertex.message = "";
	    if (e.getSource() == ifd)  // insert
	    {
		int x = Integer.parseInt(ifd.getText());
		Tree = Tree.insert(x);
		TG.requestFocus();
		m = vertex.message;
		if (m!=null && m.length()>0)
		    {
			TG.display.drawString(m,20,TG.YDIM-40);
			try{Thread.sleep(2000);} catch(Exception e1) {}
		    }
		TG.drawtree(Tree);
		try{Thread.sleep(150);} catch(Exception e1) {} 				
		ifd.setText("");
		ifd.requestFocus();
	    }
	else if (e.getSource() == dfd)  // delete
	    {  
		int x = Integer.parseInt(dfd.getText());
		Tree = Tree.delete(x);
		TG.requestFocus();
		m = vertex.message;
		if (m!=null && m.length()>0)
		    {
			TG.display.drawString(m,20,TG.YDIM-40);
			try{Thread.sleep(2000);} catch(Exception e1) {}
		    }
		TG.drawtree(Tree);
		try{Thread.sleep(150);} catch(Exception e1) {} 					dfd.setText("");
		dfd.requestFocus();
	    }
	} catch (Exception ee) {}
    } // actionPerformed.


    public static void main(String[] args)
    {
	Bst<Integer> T = new nil<Integer>();
	//	if (args.length>0)  // build tree from args
	//	    T = new <Integer>(Integer.parseInt(args[0]));
	for(int i = 1; i<args.length;i++)
	    T = T.insert(Integer.parseInt(args[i]));
	avlgui W = new avlgui(T);
    }

} // avlgui