package caida.otter;
import java.awt.*;

/*****************************************************************************
* File: StepByStep.java	Class: StepByStep
* Goal: To provide a method for showing hierarchy level step by step.
* 
* For: Cooperative Association for Internet Data Analysis
******************************************************************************
******************************************************************************
*  By accessing this software, STEPBYSTEP, you are duly informed of
*  and agree to be bound by the conditions described below in
*  this notice:
*
*  This software product, STEPBYSTEP, is developed by Bradley Huffaker, and
*  copyrighted(C) 1998 by the University of California, San Diego (UCSD),
*  with all rights reserved.  UCSD administers the NSF grant to CAIDA,
*  number NCR-9711092, under which this code was developed. 
*
*  STEPBYSTEP is a free software. You can redistribute it and/or modify it
*  under the terms of the GNU Public License v.2 as
*  published by UCSD and is incorporated by reference herein.  STEPBYSTEP is
*  distributed WITHOUT ANY WARRANTY, IMPLIED OR EXPRESS, OF MERCHANTABILITY
*  OR FITNESS FOR A PARTICULAR PURPOSE or that the use of it will not
*  infringe on any third party's intellectual property rights.
*
*  You should have received a copy of the CAIDA General Public
*  License v.1 along with the STEPBYSTEP program.  If for any reason you
*  have not received a copy, please write to
*
*                       University of California, San Diego
*                       SDSC/CAIDA
*                       9500 Gilman Dr., MS-0505
*                       La Jolla, CA 92093 - 0505  USA
*
*  Or contact INFO@CAIDA.ORG
*****************************************************************************/ 
public class StepByStep extends Frame
{
 // The display that contains the nodes to highlight
 Display display;

 // The controlling buttons
 TextField Step;
 final int DEFAULT_STEP = 0;

 Button SetStep;
 Button Next;
 Button Back;
 Button Cancel;

 int current_step;

 public StepByStep(Display display_input)
 {
	super("Step by Step");
	current_step = 1;
	display = display_input;

	SetStep = new Button("Set Step");
	Next = new Button("Next");
	Back = new Button("Back");
	Step = new TextField();
	current_step = -1;

	Cancel = new Button("Cancel");

	Label top_label = new Label("Will show the hierarchy level by level");  
	//Label middle_label= new Label("level by level");  
	Panel middle_panel = new Panel();
	middle_panel.setLayout(new BorderLayout());
	Label middle_label= new Label("Level");  
	middle_panel.add("West",middle_label);
	middle_panel.add("Center",Step);

	Panel bottom_panel = new Panel();
	//bottom_panel.setLayout(new BorderLayout());
	bottom_panel.setLayout(new FlowLayout());
	bottom_panel.add(SetStep);
	bottom_panel.add(Back);
	bottom_panel.add(Next);
	bottom_panel.add(Cancel);
	
	add("North", top_label);
	add("Center", middle_panel);
	add("South",bottom_panel);

	pack();
	
 }

 public void show()
 {
	setStep(DEFAULT_STEP);
	super.show();
 }

 public void hide()
 {
	current_step = -1;
	display.stepBystep(false);
	display.printMessage("");
	display.setMode(display.MOVE);
	super.hide();
 }

 public boolean handleEvent(Event event)
 {
	if (event.id == Event.ACTION_EVENT)
	{
		if (event.target == Cancel) 
			this.hide();
		else if (event.target == Next)
			setStep(current_step+1);
		else if (event.target == Back)
			setStep(current_step-1);
		else
		{	
			int step = 0;
			try {
				step = Integer.parseInt(Step.getText());
				setStep(step);
			} catch (NumberFormatException exception) {
				getToolkit().beep();
				Step.setText(String.valueOf(current_step));
				System.err.println("StepByStep.Color():"
				+ exception.toString());
			}
		}
	}
	return super.handleEvent(event);
 }
 
 void setStep(int step)
 {
	if (step != current_step)
	{
		Step.setText(String.valueOf(step));
		current_step = step;
		display.stepBystep(step);
	}
 }
		
}