I am so confused . can anybody help me
need to supply code in method checkMouseClick(), so that whenever you click a single leaf, this single leaf will change color(change image), and all other leaves does not change colors (images).
import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
import java.util.List;
/**
* A block that bounces back and forth across the screen.
*
* @author Michael Kölling
* @version 1.0
*/
public class Block extends Actor
{
private int delta = 2;
/**
* Move across the screen, bounce off edges. Turn leaves, if we touch any.
*/
public void act()
{
move();
checkEdge();
checkLeaf();
checkMouseClick();
}
/**
* Move sideways, either left or right.
*/
private void move()
{
setLocation(getX()+delta, getY());
}
/**
* Check whether we are at the edge of the screen. If we are, turn around.
*/
private void checkEdge()
{
if (isAtEdge())
{
delta = -delta;
}
}
/**
* Check whether the mouse button was clicked. If it was, change all leaves.
*/
private void checkMouseClick()
{
if (Greenfoot.mouseClicked(null))
{
World world = getWorld();
List<Leaf> leaves = world.getObjects(Leaf.class);
for (Leaf leaf : leaves)
{
leaf.changeImage();
}
}
}
/**
* Check whether we're touching a leaf. If we are, turn it a bit.
*/
private void checkLeaf()
{
Leaf leaf = (Leaf) getOneIntersectingObject(Leaf.class);
if (leaf != null) {
leaf.turn(9);
}
}
}
import greenfoot.*;
/**
* A floating leaf that blows across the screen.
*
* @author Michael Kölling
* @version 1.0
*/
public class Leaf extends Actor
{
private int speed;
GreenfootImage img1 = new GreenfootImage("leaf-green.png");
GreenfootImage img2 = new GreenfootImage("leaf-brown.png");
/**
* Create the leaf.
*/
public Leaf()
{
setImage(img1);
speed = Greenfoot.getRandomNumber(3) + 1; // random speed: 1 to 3
setRotation(Greenfoot.getRandomNumber(360));
}
/**
* Move around.
*/
public void act()
{
if (isAtEdge())
{
turn(180);
}
move(speed);
if (Greenfoot.getRandomNumber(100) < 50)
{
turn(Greenfoot.getRandomNumber(5) - 2); // -2 to 2
}
}
/**
* Change the image to another leaf image. This toggles back and
* forth between two images.
*/
public void changeImage()
{
if (getImage() == img1)
{
setImage(img2);
}
else {
setImage(img1);
}
}
}
import greenfoot.*;
/**
* Autumn. A world with some leaves.
*
* @author Michael Kölling
* @version 1.0
*/
public class MyWorld extends World
{
/**
* Create the world and objects in it.
*/
public MyWorld()
{
// Create a new world with 600x400 cells with a cell size of 1x1 pixels.
super(600, 400, 1);
setUp();
}
/**
* Create the initial objects in the world.
*/
private void setUp()
{
int i = 0;
while (i<18) {
int x = Greenfoot.getRandomNumber(getWidth());
int y = Greenfoot.getRandomNumber(getHeight());
addObject( new Leaf(), x, y );
i++;
}
addObject(new Block(), 300, 200);
}
}
