content: /*
   * Copyright 2014 Alex Curran
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.github.amlcurran.showcaseview;
  
  import android.animation.AnimatorListenerAdapter;
  import android.os.Build.VERSION_CODES;
  import android.animation.Animator;
  import android.animation.AnimatorSet;
  import android.animation.ObjectAnimator;
  import android.annotation.TargetApi;
  import android.graphics.Point;
  import android.view.View;
  import android.view.animation.AccelerateDecelerateInterpolator;
  
  @TargetApi(VERSION_CODES.HONEYCOMB)
  class AnimatorAnimationFactory implements AnimationFactory {
  
      private static final String ALPHA = "alpha";
      private static final float INVISIBLE = 0f;
      private static final float VISIBLE = 1f;
  
      private final AccelerateDecelerateInterpolator interpolator;
  
      public AnimatorAnimationFactory() {
          interpolator = new AccelerateDecelerateInterpolator();
      }
  
      @Override
      public void fadeInView(View target, long duration, final AnimationStartListener listener) {
          ObjectAnimator oa = ObjectAnimator.ofFloat(target, ALPHA, INVISIBLE, VISIBLE);
          oa.setDuration(duration).addListener(new AnimatorListenerAdapter() {
  
              @Override
              public void onAnimationStart(Animator animator) {
                  listener.onAnimationStart();
              }
  
          });
          oa.start();
      }
  
      @Override
      public void fadeOutView(View target, long duration, final AnimationEndListener listener) {
          ObjectAnimator oa = ObjectAnimator.ofFloat(target, ALPHA, INVISIBLE);
          oa.setDuration(duration).addListener(new AnimatorListenerAdapter() {
  
              @Override
              public void onAnimationEnd(Animator animator) {
                  listener.onAnimationEnd();
              }
  
          });
          oa.start();
      }
  
      @Override
      public void animateTargetToPoint(ShowcaseView showcaseView, Point point) {
          AnimatorSet set = new AnimatorSet();
          ObjectAnimator xAnimator = ObjectAnimator.ofInt(showcaseView, "showcaseX", point.x);
          ObjectAnimator yAnimator = ObjectAnimator.ofInt(showcaseView, "showcaseY", point.y);
          set.playTogether(xAnimator, yAnimator);
          set.setInterpolator(interpolator);
          set.start();
      }
  
  }
  