/** Move the snake by one field. */
public void move() {
currentDirection = nextDirection;
Field newHead = grid.getFromDirection(head, currentDirection);
if (newHead.getState().equals(State.TAIL)) {
collision.set(true);
return;
}
boolean grow = false;
if (newHead.getState().equals(State.FOOD)) {
grow = true;
}
Field lastField = head;
for (int i = 0; i < tail.size(); i++) {
Field f = tail.get(i);
lastField.changeState(State.TAIL);
tail.set(i, lastField);
lastField = f;
}
if (grow) {
grow(lastField);
addPoints();
} else {
lastField.changeState(State.EMPTY);
}
setHead(newHead);
}
/** Creates a new {@link FXViewer}. */
public FXViewer() {
super();
// add binding to viewer focused property to have its value computed
// based on the values of:
// - window focused
// - focusOwner
// - focusOwner focused
viewerFocusedProperty.bind(viewerFocusedPropertyBinding);
}
/** Initalizes the fields of the snake. */
public void init() {
setHead(grid.getXY(x, y));
collision.set(false);
points.set(0);
currentDirection = Direction.UP;
nextDirection = Direction.UP;
}
public final boolean isArmed() {
return armed.get();
}
public final ReadOnlyBooleanProperty armedProperty() {
return armed.getReadOnlyProperty();
}
public ReadOnlyBooleanProperty indeterminateProperty() {
return indeterminate.getReadOnlyProperty();
}
public boolean isIndeterminate() {
return indeterminate.get();
}
/**
* Set the value for the progress, it cannot be more then 100 (meaning 100%). A negative value
* means indeterminate progress.
*
* @param progressValue
* @see ProgressCircleIndicator#makeIndeterminate()
*/
public void setProgress(int progressValue) {
progress.set(defaultToHundred(progressValue));
indeterminate.set(progressValue < 0);
}
public ReadOnlyBooleanProperty collisionProperty() {
return collision.getReadOnlyProperty();
}
@Override
public ReadOnlyBooleanProperty viewerFocusedProperty() {
return viewerFocusedProperty.getReadOnlyProperty();
}
@Override
public boolean isViewerFocused() {
return viewerFocusedProperty.get();
}
public ReadOnlyBooleanProperty hasErrorsProperty() {
return hasErrors.getReadOnlyProperty();
}
public boolean getHasErrors() {
return hasErrors.get();
}
@Override
public ReadOnlyBooleanProperty disabledProperty() {
return disabled.getReadOnlyProperty();
}
public AbstractDisableable() {
disabled.bind(disablers.emptyProperty().not());
}
