JazzyEffect.java

package python.listview;

import android.view.View;

import com.nineoldandroids.view.ViewPropertyAnimator;

/**
 * This interface serves as the contract for a transition effect.
 */
public interface JazzyEffect {
	/**
	 * Initializes the view's attributes so that the view is in position to
	 * begin the animation.
	 * 
	 * @param item
	 *            The view to be animated.
	 * @param position
	 *            The index of the view in the list.
	 * @param scrollDirection
	 *            Positive number indicating scrolling down, or negative number
	 *            indicating scrolling up.
	 */
	void initView(View item, int position, int scrollDirection);

	/**
	 * Configures the animator object with the relative changes or destination
	 * point for any attributes that will be animated.
	 * 
	 * @param item
	 *            The view to be animated.
	 * @param position
	 *            The index of the view in the list.
	 * @param scrollDirection
	 *            Positive number indicating scrolling down, or negative number
	 *            indicating scrolling up.
	 * @param animator
	 *            The ViewPropertyAnimator object responsible for animating the
	 *            view.
	 */
	void setupAnimation(View item, int position, int scrollDirection,
			ViewPropertyAnimator animator);
}