content: /*******************************************************************************
   * Copyright 2011-2013 Sergey Tarasevich, Daniel Martí
   *
   * 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.nostra13.universalimageloader.core.display;
  
  import android.graphics.Bitmap;
  import android.view.View;
  import android.view.animation.AlphaAnimation;
  import android.view.animation.DecelerateInterpolator;
  import android.widget.ImageView;
  import com.nostra13.universalimageloader.core.assist.LoadedFrom;
  import com.nostra13.universalimageloader.core.imageaware.ImageAware;
  
  /**
   * Displays image with "fade in" animation
   *
   * @author Sergey Tarasevich (nostra13[at]gmail[dot]com), Daniel Martí
   * @since 1.6.4
   */
  public class FadeInBitmapDisplayer implements BitmapDisplayer {
  
  	private final int durationMillis;
  
  	private final boolean animateFromNetwork;
  	private final boolean animateFromDisk;
  	private final boolean animateFromMemory;
  
  	/**
  	 * @param durationMillis Duration of "fade-in" animation (in milliseconds)
  	 */
  	public FadeInBitmapDisplayer(int durationMillis) {
  		this(durationMillis, true, true, true);
  	}
  
  	/**
  	 * @param durationMillis     Duration of "fade-in" animation (in milliseconds)
  	 * @param animateFromNetwork Whether animation should be played if image is loaded from network
  	 * @param animateFromDisk    Whether animation should be played if image is loaded from disk cache
  	 * @param animateFromMemory  Whether animation should be played if image is loaded from memory cache
  	 */
  	public FadeInBitmapDisplayer(int durationMillis, boolean animateFromNetwork, boolean animateFromDisk,
  								 boolean animateFromMemory) {
  		this.durationMillis = durationMillis;
  		this.animateFromNetwork = animateFromNetwork;
  		this.animateFromDisk = animateFromDisk;
  		this.animateFromMemory = animateFromMemory;
  	}
  
  	@Override
  	public void display(Bitmap bitmap, ImageAware imageAware, LoadedFrom loadedFrom) {
  		imageAware.setImageBitmap(bitmap);
  
  		if ((animateFromNetwork && loadedFrom == LoadedFrom.NETWORK) ||
  				(animateFromDisk && loadedFrom == LoadedFrom.DISC_CACHE) ||
  				(animateFromMemory && loadedFrom == LoadedFrom.MEMORY_CACHE)) {
  			animate(imageAware.getWrappedView(), durationMillis);
  		}
  	}
  
  	/**
  	 * Animates {@link ImageView} with "fade-in" effect
  	 *
  	 * @param imageView      {@link ImageView} which display image in
  	 * @param durationMillis The length of the animation in milliseconds
  	 */
  	public static void animate(View imageView, int durationMillis) {
  		if (imageView != null) {
  			AlphaAnimation fadeImage = new AlphaAnimation(0, 1);
  			fadeImage.setDuration(durationMillis);
  			fadeImage.setInterpolator(new DecelerateInterpolator());
  			imageView.startAnimation(fadeImage);
  		}
  	}
  }
  