/**
* Flips the faceup state of the topmost card on the BuildablePile.
*
* <p>Generates modelChanged action if BuildablePile is not empty.
*
* <p>
*
* @return boolean if able to flip the card on top of the BuildablePile
*/
public boolean flipCard() {
if (empty()) return false;
Card c = get();
c.setFaceUp(!c.isFaceUp());
add(c);
hasChanged(); // state has changed
return true;
}
/**
* Return the number of cards in this BuildablePile that are face down.
*
* <p>
*
* @return int
*/
public int getNumFaceDown() {
int numFaceDown = 0;
int ct = count();
for (int i = 0; i < ct; i++) {
Card c = peek(ct - i - 1);
if (c.isFaceUp() == false) {
numFaceDown++;
}
}
return numFaceDown;
}
/**
* Returns whether the top of the BuildablePile is face up.
*
* <p>Note: an empty BuildablePile is returned as false
*
* <p>
*
* @return int
*/
public boolean faceUp() {
if (empty()) return false;
Card c = peek();
return c.isFaceUp();
}