StickFigure

This program draws a stick figure where the user clicks. Whenever the user depresses the mouse, the word "Hi" appears where the mouse is. When the user moves the mouse out of the window, a stick figure is drawn in the upper left corner of the window.

import objectdraw.*;
import java.awt.*;

/**
 * Draws a stick figure on the display.  When the user depresses the mouse
 * button, the stick figure says "hi"
 * 
 * @author Barbara Lerner
 * @version March 3, 2008
 */
public class DrawAStickFigure extends WindowController
{
    /**
     * Resize the window
     */
    public void begin() {
        resize (600, 600);
    }
    
    /**
     * Draw a stick figure where the user clicks.
     */
    public void onMouseClick (Location point) {
        new StickFigure (point, canvas);
    }        
    
    /**
     * Draw a stick figure in the upper left corner of the window.
     */
    public void onMouseExit (Location point) {
        new StickFigure (new Location(0, 0), canvas);
    }        
    
     /**
     * Add the text "hi" to the screen when the user depresses the mouse
     * button.
     */
    public void onMousePress (Location point) {
        new Text ("Hi!", point, canvas);
    }
}

import objectdraw.*;
import java.awt.*;

/**
 * Draws a stick figure
 * 
 * @author Barbara Lerner
 * @version October 9, 2008
 */
public class StickFigure
{
    // The size of the head
    private static final int HEAD_SIZE = 100;
    
    // The size of the body
    private static final int BODY_SIZE = HEAD_SIZE * 2;
    
    // The relative location of the hand to the shoulder
    private static final int ARM_X_OFFSET = HEAD_SIZE / 2;
    private static final int ARM_Y_OFFSET = HEAD_SIZE / 2;
    
    // The relative location of the foot from the shoulder
    private static final int LEG_X_OFFSET = HEAD_SIZE / 2;
    private static final int LEG_Y_OFFSET = LEG_X_OFFSET * 2;
    
    /**
     * Draws a stick figure
     * 
     * @param upperLeft the upper left location for the stick figure
     * @param figureCanvas the canvas to draw on
     */
    public StickFigure (Location upperLeft, DrawingCanvas figureCanvas) {
        // The location of the head
        double headLeft = upperLeft.getX();
        double headTop = upperLeft.getY();
        
        // The location of the body
        double bodyLeft = headLeft + (HEAD_SIZE / 2);
        double bodyTop = headTop + HEAD_SIZE;
        
        // The location of the arms
        double armBottom = bodyTop + ARM_Y_OFFSET;
        double armTop = bodyTop;
        double leftArmLeft = bodyLeft - ARM_X_OFFSET;
        double rightArmRight = bodyLeft + ARM_X_OFFSET;
        
        // The location of the legs.
        double legTop = bodyTop + BODY_SIZE;
        double leftLegLeft = bodyLeft - LEG_X_OFFSET;
        double rightLegRight = bodyLeft + LEG_X_OFFSET;
        double legBottom = legTop + LEG_Y_OFFSET;

        // Draw the head
        new FramedOval (headLeft, headTop, HEAD_SIZE, HEAD_SIZE, figureCanvas);
        
        // Draw the body
        new Line (bodyLeft, bodyTop, bodyLeft, bodyTop + BODY_SIZE, figureCanvas);
        
        // Draw the arms
        new Line (leftArmLeft, armTop, bodyLeft, armBottom, figureCanvas);
        new Line (rightArmRight, armTop, bodyLeft, armBottom, figureCanvas);
        
        // Draw the legs
        new Line (bodyLeft, legTop, leftLegLeft, legBottom, figureCanvas);
        new Line (bodyLeft, legTop, rightLegRight, legBottom, figureCanvas);
    }
}