ZoomCenterPageTransformer.java

package cn.bingoogolapple.bgabanner.transformer;

import android.support.v4.view.ViewCompat;
import android.view.View;

/**
 * 作者:王浩 邮件:bingoogolapple@gmail.com
 * 创建时间:15/6/19 上午8:41
 * 描述:
 */
public class ZoomCenterPageTransformer extends BGAPageTransformer {

    @Override
    public void handleInvisiblePage(View view, float position) {
    }

    @Override
    public void handleLeftPage(View view, float position) {
        ViewCompat.setTranslationX(view, -view.getWidth() * position);

        ViewCompat.setPivotX(view, view.getWidth() * 0.5f);
        ViewCompat.setPivotY(view, view.getHeight() * 0.5f);
        ViewCompat.setScaleX(view, 1 + position);
        ViewCompat.setScaleY(view, 1 + position);

        if (position < -0.95f) {
            ViewCompat.setAlpha(view, 0);
        } else {
            ViewCompat.setAlpha(view, 1);
        }
    }

    @Override
    public void handleRightPage(View view, float position) {
        ViewCompat.setTranslationX(view, -view.getWidth() * position);

        ViewCompat.setPivotX(view, view.getWidth() * 0.5f);
        ViewCompat.setPivotY(view, view.getHeight() * 0.5f);
        ViewCompat.setScaleX(view, 1 - position);
        ViewCompat.setScaleY(view, 1 - position);

        if (position > 0.95f) {
            ViewCompat.setAlpha(view, 0);
        } else {
            ViewCompat.setAlpha(view, 1);
        }
    }

}