====== A Solution on Assignment 2 - Problem 3 ======

This is "a" Solution of Assignment 2 - Problem 3 from the [[http://see.stanford.edu/see/courseinfo.aspx?coll=824a47e1-135f-4508-a5aa-866adcae1111|Computer Science Course CS106A of Prof. Mehran Sahami]] at the [[http://www.stanford.edu|STANFORD University]]. 

In fact, i cant realy tell anymore if I wrote this code or if i found it somewhere on the internet :). It looks pretty much like programm code i usualy make. But will not claim that this is MY Code. Just a Code that solves the Problem as requested for example purposes.

<code java ProgramHierarchy.java>
/*
 * File: ProgramHierarchy.java
 * Name: 
 * Section Leader: 
 * ---------------------------
 * This file is the starter file for the ProgramHierarchy problem.
 */

import acm.graphics.*;
import acm.program.*;


public class ProgramHierarchy_example_solution1 extends GraphicsProgram {

	public static final double BOX_WIDTH = 200.0;
	public static final double BOX_HEIGHT = 80.0;

	public void run() {
		double horizontalMargin = (getWidth() - BOX_WIDTH * 3) / 4;
		double verticalMargin = (getHeight() - BOX_HEIGHT * 2) / 3;

		double x = horizontalMargin * 2 + BOX_WIDTH;
		double y = verticalMargin;

		GRect box1 = drawBox(x, y, "Program");

		x = horizontalMargin;
		y = verticalMargin * 2 + BOX_HEIGHT;

		GRect box2 = drawBox(x, y, "GraphicsProgram");

		x = horizontalMargin * 2 + BOX_WIDTH;
		y = verticalMargin * 2 + BOX_HEIGHT;

		GRect box3 = drawBox(x, y, "ConsoleProgram");

		x = horizontalMargin * 3 + BOX_WIDTH * 2;
		y = verticalMargin * 2 + BOX_HEIGHT;

		GRect box4 = drawBox(x, y, "DialogProgram");

		drawConnectingLine(box1, box2);
		drawConnectingLine(box1, box3);
		drawConnectingLine(box1, box4);
	}

	public GRect drawBox (double x, double y, String text) {

		GRect box = new GRect (x, y, BOX_WIDTH, BOX_HEIGHT);
		add(box);

		GLabel label = new GLabel (text, x, y);

		x = x  + BOX_WIDTH / 2 - label.getWidth() / 2;
		y = y + BOX_HEIGHT / 2 + label.getAscent() / 2 ;

		label.setLocation (x, y);
		add (label);

		return box;
	}

	public void drawConnectingLine(GRect fromBox, GRect toBox) {

		double fromX = fromBox.getX() + BOX_WIDTH / 2;
		double fromY = fromBox.getY() + BOX_HEIGHT;

		double toX = toBox.getX() + BOX_WIDTH / 2;
		double toY = toBox.getY();

		GLine line = new GLine (fromX, fromY, toX, toY);
		add(line);
	}
}
</code>

 --- //[[mail@awerner.homeip.net|Axel Werner]] 2012-04-02 16:07//

{{tag>java karel stanford university cs106 computer science learning programming}}