Animation exercise Extra Credit CS 210 import java awt. public class Car public

Question

Animation exercise Extra Credit CS 210 import java awt. public class Car public static void main (String args) Drawing Panel panel E new Drawing Panel (200 100) panel setBackground (Color.LIGHT GRAY) Graphics g panel. getGraphics car body g. set Color (Color BLACK) g. fill Rect (10, 30, 100 50) a Drawing pane x wheels g. set Color (Color RED File Help g. fill Oval (20, 70, 20, 20) g. filloval (80, 70, 20, 20) window g set Color (Color CYAN) g. fill Rect (80, 40, 30, 20) 7/13/2015 Portions Copyright 2008 by Pearson Education

Explanation / Answer

import aLibrary.*; import java.awt.Color; public class Car { /** whether this Car is selected */ private boolean isSelected; /** the graphics object displayed in the window */ private ARoundRectangle rrect; /** the window where graphics are displayed */ private A3ButtonWindow win; /** the court where cars are displayed */ private Court court; /** the car width */ public final int CAR_WIDTH = 60; /** the car height */ public final int CAR_HEIGHT = 40; /** the car movement increment each time the 'Move' button is pressed */ private final int CAR_INCREMENT = 10; /** stores the direction this Car is moving in */ private int direction; /** constant for right direction */ private static final int RIGHT = 0; /** constant for up direction */ private static final int UP = 1; /** constant for left direction */ private static final int LEFT = 2; /** constant for down direction */ private static final int DOWN = 3; /** * Constructor for objects of class Car *

• initializes all instance variables of Car class
  *
• instantiates the RoundRectangle graphics object
  *
• initializes the color of the graphics object
  *
• sets graphics object as Filled if this is the selected Car
  *
• places the graphics object in the window container

* @param upperLeftX the x coordinate of the upper left corner of this Car * @param upperLeftY the y coordinate of the upper left corner of this Car * @param newColor the desired color for this Car * @param newSelect true if this Car is the selected Car, false otherwise * @param newWin a reference variable to the A3ButtonWindow */ public Car( int upperLeftX, int upperLeftY, Color newColor, boolean newSelect, A3ButtonWindow newWin, Court c ) { win = newWin; court = c; isSelected = newSelect; direction = RIGHT; rrect = new ARoundRectangle( upperLeftX, upperLeftY, CAR_WIDTH, CAR_HEIGHT ); // passes the values ( size ) of this car if( isSelected ) rrect.setToFill(); rrect.setColor( newColor ); rrect.place( win ); win.repaint(); } /** @return true if this is the selected Car, false otherwise */ public boolean isSelected(){ return isSelected; } /** sets this Car as the selected Car

* also sets fill and updates the mid button text

* repaints the window */ public void select(){ isSelected = true; rrect.setToFill(); switch ( direction ){ case RIGHT: win.setMidText("Right"); break; case UP: win.setMidText("Up"); break; case LEFT: win.setMidText("Left"); break; case DOWN: win.setMidText("Down"); } win.repaint(); } /** sets this Car as NOT selected

* also sets outline display and repaints the window */ public void deSelect(){ isSelected = false; rrect.setToOutline(); win.repaint(); } /** moves the selected Car in the direction * that is set within its direction variable */ public void moveCar(){ int stepX =0; int stepY=0; Car other = court.getOtherCar(this); boolean tooHighToCollide= ((this.rrect.getY()+CAR_HEIGHT)(other.rrect.getY()+CAR_HEIGHT)) ; // checks if this car is too low to collide if moving other than down boolean farLeftToCollide=(this.rrect.getX()>other.rrect.getX()+CAR_WIDTH); // checks if this car is too left to collide if moving other than left boolean farRightToCollide = ((this.rrect.getX()+CAR_WIDTH) ((this.rrect.getX() + CAR_WIDTH + CAR_INCREMENT))) // tests if the next move left will be beyond the right border of the window { if ( ( ((this.rrect.getX() + CAR_WIDTH + CAR_INCREMENT)< ((other.rrect.getX()))) ||(tooHighToCollide) ||tooLowToCollide ) ) stepX = CAR_INCREMENT; else if (farLeftToCollide) stepX = CAR_INCREMENT; } break; case UP: if ((0) < ((this.rrect.getY()- CAR_INCREMENT))) // tests if the next move up will be beyond the top border of the window if ((this.rrect.getY()-CAR_INCREMENT>(other.rrect.getY()+CAR_HEIGHT)) || (farLeftToCollide) || (farRightToCollide) ) stepY = -CAR_INCREMENT; else if (tooHighToCollide) stepY = -CAR_INCREMENT; break; case LEFT: if ((0) < ((this.rrect.getX()- CAR_INCREMENT))) // tests if the next move left will be beyond the Left border of the window { if(( ((this.rrect.getX() - CAR_INCREMENT)> ((other.rrect.getX()+CAR_WIDTH))) ||(tooHighToCollide) ||tooLowToCollide ) ) stepX =-CAR_INCREMENT; else if (this.rrect.getX() ((this.rrect.getY()+CAR_HEIGHT+ CAR_INCREMENT)- court.BOTTOM_LINE)) // tests if the next move down will be beyond the BottomLine if (((this.rrect.getY()+CAR_INCREMENT+CAR_HEIGHT)

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