solitaire with greenfoot #4
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1
Greenfoot
[email protected]/6/29
CC Attribution-ShareAlike 3.0 Unported
solitaire-4
Cardact()Pileact()
flipNextCard()
public class Card extends Actor
{
public void act()
{
//
if (!isFaceUp) {
if (Greenfoot.mouseClicked(this) && this == pile.getTopCard()) {
if (pile instanceof UnflippedPile) {
((UnflippedPile) pile).flipNextCard();
} else if (pile instanceof WorkingPile) {
((WorkingPile) pile).flipTopCard();
}
}
}
}
}
instanceof
WorkingPile x instanceof WorkingPile
WorkingPile x instanceof Pile
Card y instanceof Pile?
((WorkingPile) pile).flip()
pilePilePileflipTopCard()WorkingPileflipTopCard()
pileWorkingPileinstanceof
(WorkingPile) pile
flipTopCard()
public class UnflippedPile extends Pile
{
public void act()
{
//
if (Greenfoot.mouseClicked(this))
{
Table table = (Table) getWorld();
table.getFlippedPile().returnAllCards();
}
}
}
moveToWorking()
subclassMovingPile
act()
MovingPile
public class MovingPile extends Pile
{
/**
*
*/
public void act()
{
MouseInfo mouse = Greenfoot.getMouseInfo();
setLocation(mouse.getX(), mouse.getY());
}
}
MovingPile
Greenfoot 2.1.1
public class MovingPile extends Pile
{
/**
*
*/
public void act()
{
MouseInfo mouse = Greenfoot.getMouseInfo();
If (mouse != null) {
setLocation(mouse.getX(), mouse.getY());
}
}
}
MouseInfo
MouseInfo
Greenfoot APIMouseInfo
MouseInfo
getX()getY()
MovingPile
startMoving()Pile
public class Card extends Actor
{
private boolean isDragging = false;
public void act()
{
//
if (isFaceUp) {
if (!isDragging && Greenfoot.mouseDragged(this)) {
isDragging = true;
pile.startMoving(this);
}
//
} else {
if (Greenfoot.mouseClicked(this) && this == pile.getTopCard()) {
}
}
}
}
public class Pile extends Actor
{
public void startMoving(Card starCard)
{
int index = -1;
for (int i = 0; i < getSize(); i++) {
if (getCard(i) == starCard) {
index = i;
break;
}
}
if (index == -1) {
return;
}
MovingPile target = new MovingPile(this);
MouseInfo mouse = Greenfoot.getMouseInfo();
getWorld().addObject(target, mouse.getX(), mouse.getY());
while (index < getSize()) {
Card card = takeCard(index);
target.addCard(card);
}
}
}
public class MovingPile extends Pile
{
/** */
Pile from = null;
/**
*
*
* @param from
*/
public MovingPile(Pile from)
{
this.from = from;
}
}
public class MovingPile extends Pile
{
/**
*
*/
public void act()
{
MouseInfo mouse = Greenfoot.getMouseInfo();
setLocation(mouse.getX(), mouse.getY());
redrawCards();
}
}
public class MovingPile extends Pile
{
/**
*
*
*/
public void redrawCards()
{
for (int i = 0; i < getSize(); i++)
{
getCard(i).setLocation(getX(), getY() + 3 + 12 * i);
}
}
}
public class Card extends Actor {
public void act() {
if (isFaceUp) {
if (!isDragging && Greenfoot.mouseDragged(this)) {
} else if (isDragging && Greenfoot.mouseDragEnded(this)) {
isDragging = false;
MovingPile movingPile = (MovingPile) pile;
Pile target = movingPile.getNowOnPile();
if (target == null) {
movingPile.returnCards();
} else if (!target.isAcceptCard(this)) {
movingPile.returnCards();
} else {
movingPile.moveTo(target);
}
}
}
}
}
import java.util.List;
public class MovingPile extends Pile
{
/**
*
*
* @return null
*/
public Pile getNowOnPile()
{
MouseInfo mouse = Greenfoot.getMouseInfo();
List piles = getWorld().getObjectsAt(mouse.getX(), mouse.getY(), Pile.class);
piles.remove(this); // MovingPile
if (piles.size() == 0) {
return null;
}
return piles.get(0);
}
}
isAcceptCard()
WorkingPileResultPileisAcceptCard()
PileisAcceptCard()WorkingPileResultPileoverrideisAcceptCard()
isAcceptCard()
public class Pile extends Actor
{
/**
*
*
* @param card
* @return
*/
public boolean isAcceptCard(Card card)
{
return false;
}
}
returnCards()moveTo()
MovingPile
takeBottomCard()
public class MovingPile extends Pile
{
/**
* null
*
* @return
*/
public Card takeBottomCard()
{
if (getSize() == 0)
{
return null;
}
return takeCard(0);
}
}
returnCards()moveTo()
returnCards()
public class MovingPile extends Pile
{
/**
*
*
*/
public void returnCards()
{
while (getSize() > 0)
{
Card card = takeBottomCard();
from.addCard(card);
}
getWorld().removeObject(this);
}
}
moveTo()
public class MovingPile extends Pile
{
/**
*
*
* @param target
*/
public void moveTo(Pile target)
{
while (getSize() > 0)
{
Card card = takeBottomCard();
target.addCard(card);
}
getWorld().removeObject(this);
}
}
solitaire-5