CS106A: Assignment 2.3

Program Hierarchy

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

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

/* This program draws the acm hierarchy. The philosphy behind it
 * is that the boxes are first created at the origin, then moved
 * to their correct positions. The same applies to the labels and
 * the lines.
 */
public class ProgramHierarchy extends GraphicsProgram {	
	
	// assigns boxes a constant width of 150 pixels
	private static final double BOX_WIDTH = 150;
	
	// assigns boxes a constant height of 50 pixels
	private static final double BOX_HEIGHT = 50;
	
	public void run() {
		createFigure();
	}
	
	// creates entire figure
	private void createFigure() {
		createBoxes();
		createLabels();
		drawLines();
	}
	
	// creates boxes and positions them
	private void createBoxes() {
		createCentreBox();
		createFlankBoxes();
		createTopBox();
	}
	
	// creates labels and positions them
	private void createLabels() {
		createConsoleLabel();
		createGraphicsLabel();
		createDialogLabel();
		createProgramLabel();
	}
	
	// draws lines and positions them
	private void drawLines() {
		drawVerticalLine();
		drawDiagonalLines();
	}
	
	// creates centre box and positions it
	private void createCentreBox() {
		positionCentre();
	}
	
	// creates flank boxes and positions them
	private void createFlankBoxes() {
		positionRightFlank();
		positionLeftFlank();
	}
	
	// creates top box and positions it
	private void createTopBox() {
		positionTop();
	}
	
	// creates console label and positions it
	private void createConsoleLabel() {
		GLabel consoleLabel = new GLabel ("ConsoleProgram", 0, 0);
		add (consoleLabel);
		consoleLabel.move((getWidth() / 2) - (consoleLabel.getWidth() / 2), getHeight() / 2 + (consoleLabel.getHeight()/2));
	}
	
	// creates graphics label and positions it
	private void createGraphicsLabel() {
		GLabel graphicsLabel = new GLabel ("GraphicsProgram", 0, 0);
		add (graphicsLabel);
		graphicsLabel.move((getWidth() / 4) - (graphicsLabel.getWidth() / 2), getHeight() / 2 + (graphicsLabel.getHeight()/2));
	}
	
	// creates dialog label and positions it
	private void createDialogLabel() {
		GLabel dialogLabel = new GLabel ("DiaologProgram", 0, 0);
		add (dialogLabel);
		dialogLabel.move((getWidth() / 4*3) - (dialogLabel.getWidth() / 2), getHeight() / 2 + (dialogLabel.getHeight()/2));
	}
	
	// creates program label and positions it
	private void createProgramLabel() {
		GLabel programLabel = new GLabel ("Program", 0, 0);
		add (programLabel);
		programLabel.move((getWidth() / 2) - (programLabel.getWidth() / 2), getHeight() / 4 + (programLabel.getHeight()/2));
	}
	
	// draws vertical line and positions it
	private void drawVerticalLine() {
		GLine verticalLine = new GLine (getWidth()/2, (getHeight() / 2) - (BOX_HEIGHT/2), getWidth() / 2, (getHeight()/4) + (BOX_HEIGHT/2));
		add (verticalLine);
	}
	
	// draws diagonal lines and positions them
	private void drawDiagonalLines() {
		GLine diagonalRightLine = new GLine (getWidth()/4*3, (getHeight() / 2) - (BOX_HEIGHT/2), getWidth() / 2, (getHeight()/4) + (BOX_HEIGHT/2));
		add (diagonalRightLine);
		GLine diagonalLeftLine = new GLine (getWidth()/4, (getHeight() / 2) - (BOX_HEIGHT/2), getWidth() / 2, (getHeight()/4) + (BOX_HEIGHT/2));
		add (diagonalLeftLine);
	}
	
	// creates box at origin coordinates
	private GRect createBox() {
		GRect box = new GRect (0, 0, BOX_WIDTH, BOX_HEIGHT);
		add (box);
		return box;
	}
	
	// creates a box called centreBox
	GRect centreBox = createBox();
	
	// moves centreBox box to the centre of the program
	private void positionCentre() {
		findXCentre();
		findYCentre();
		double x = findXCentre();
		double y = findYCentre();
		centreBox.move(x, y);
	}

	// returns the centre coordinates for x minus half the box width
	private double findXCentre() {
		double x = getWidth() / 2 - (BOX_WIDTH/2);
		return x;
	}
	
	// returns the centre coordinates for y minus half the box height
	private double findYCentre() {
		double y = getHeight() / 2 - (BOX_HEIGHT/2);
		return y;
	}

	// creates a box called rightBox
	GRect rightBox = createBox();
	
	// moves rightBox from origin to right of centreBox
	private void positionRightFlank() {
		findXCentre();
		findYCentre();
		double rx = findXCentre() + getWidth() / 4;
		rightBox.move(rx, findYCentre());
	}
	
	// creates a box called leftBox
	GRect leftBox = createBox();
	
	// moves leftBox from origin to left of centreBox
	private void positionLeftFlank() {
		findXCentre();
		findYCentre();
		double rx = findXCentre() - getWidth() / 4;
		leftBox.move(rx, findYCentre());
	}
	
	// creates a box called topBox
	GRect topBox = createBox();
	
	// moves topBox from origin to top of centreBox
	private void positionTop() {
		findXCentre();
		findYCentre();
		double ry = findYCentre() - getHeight() / 4;
		topBox.move(findXCentre(), ry);
	}
	
}