EdgeEffectCompat.java

//Edge Effects...

package android.support.v4.view;

import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Canvas;
import android.view.View;
import android.widget.EdgeEffect;

/**
 * Wrapper around {@link EdgeEffect} for compatibility with older versions of
 * Android.
 */
@TargetApi(14)
public class EdgeEffectCompat {
	/**
	 * The wrapped EdgeEffect.
	 */
	private EdgeEffect mEdge;

	/**
	 * Call {@link EdgeEffect#EdgeEffect(Context)}.
	 */
	public EdgeEffectCompat(Context context)
	{
		mEdge = new EdgeEffect(context);
	}

	/**
	 * Call {@link EdgeEffect#onPull(float)}.
	 */
	public void onPull(float deltaDistance)
	{
		mEdge.onPull(deltaDistance);
	}

	/**
	 * Call {@link EdgeEffect#finish()}.
	 */
	public void finish()
	{
		mEdge.finish();
	}

	/**
	 * Call {@link EdgeEffect#isFinished()}.
	 */
	public boolean isFinished()
	{
		return mEdge.isFinished();
	}

	/**
	 * Call {@link EdgeEffect#onRelease()}.
	 */
	public void onRelease()
	{
		mEdge.onRelease();
	}

	/**
	 * Call {@link EdgeEffect#draw(Canvas)}.
	 */
	public boolean draw(Canvas canvas)
	{
		return mEdge.draw(canvas);
	}

	/**
	 * Call {@link EdgeEffect#setSize(int,int)}.
	 */
	public void setSize(int width, int height)
	{
		mEdge.setSize(width, height);
	}

	/**
	 * Call {@link View#getOverScrollMode()}.
	 *
	 * (This is unrelated to EdgeEffect; it's thrown in here since ViewPager
	 * also uses it.)
	 */
	public static int getOverScrollMode(View view)
	{
		return view.getOverScrollMode();
	}

	/**
	 * Call {@link View#canScrollHorizontally(int)}.
	 *
	 * (This is unrelated to EdgeEffect; it's thrown in here since ViewPager
	 * also uses it.)
	 */
	public static boolean canScrollHorizontally(View view, int direction)
	{
		return view.canScrollHorizontally(direction);
	}
}