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      1 /*
      2 * Copyright 2013 The Android Open Source Project
      3 *
      4 * Licensed under the Apache License, Version 2.0 (the "License");
      5 * you may not use this file except in compliance with the License.
      6 * You may obtain a copy of the License at
      7 *
      8 *     http://www.apache.org/licenses/LICENSE-2.0
      9 *
     10 * Unless required by applicable law or agreed to in writing, software
     11 * distributed under the License is distributed on an "AS IS" BASIS,
     12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13 * See the License for the specific language governing permissions and
     14 * limitations under the License.
     15 */
     16 
     17 
     18 package com.example.android.batchstepsensor.cardstream;
     19 
     20 import android.animation.ObjectAnimator;
     21 import android.animation.PropertyValuesHolder;
     22 import android.annotation.TargetApi;
     23 import android.content.Context;
     24 import android.graphics.Point;
     25 import android.os.Build;
     26 import android.view.View;
     27 import android.view.WindowManager;
     28 import android.view.animation.BounceInterpolator;
     29 
     30 class DefaultCardStreamAnimator extends CardStreamAnimator {
     31 
     32     @TargetApi(Build.VERSION_CODES.HONEYCOMB)
     33     @Override
     34     public ObjectAnimator getDisappearingAnimator(Context context){
     35 
     36         ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(new Object(),
     37                 PropertyValuesHolder.ofFloat("alpha", 1.f, 0.f),
     38                 PropertyValuesHolder.ofFloat("scaleX", 1.f, 0.f),
     39                 PropertyValuesHolder.ofFloat("scaleY", 1.f, 0.f),
     40                 PropertyValuesHolder.ofFloat("rotation", 0.f, 270.f));
     41 
     42         animator.setDuration((long) (200 * mSpeedFactor));
     43         return animator;
     44     }
     45 
     46     @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
     47     @Override
     48     public ObjectAnimator getAppearingAnimator(Context context){
     49 
     50         final Point outPoint = new Point();
     51         WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
     52         wm.getDefaultDisplay().getSize(outPoint);
     53 
     54         ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(new Object(),
     55                 PropertyValuesHolder.ofFloat("alpha", 0.f, 1.f),
     56                 PropertyValuesHolder.ofFloat("translationY", outPoint.y / 2.f, 0.f),
     57                 PropertyValuesHolder.ofFloat("rotation", -45.f, 0.f));
     58 
     59         animator.setDuration((long) (200 * mSpeedFactor));
     60         return animator;
     61     }
     62 
     63     @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
     64     @Override
     65     public ObjectAnimator getInitalAnimator(Context context){
     66 
     67         ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(new Object(),
     68                 PropertyValuesHolder.ofFloat("alpha", 0.5f, 1.f),
     69                 PropertyValuesHolder.ofFloat("rotation", 60.f, 0.f));
     70 
     71         animator.setDuration((long) (200 * mSpeedFactor));
     72         return animator;
     73     }
     74 
     75     @TargetApi(Build.VERSION_CODES.HONEYCOMB)
     76     @Override
     77     public ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY){
     78 
     79         float deltaXAbs = Math.abs(deltaX);
     80 
     81         float fractionCovered = 1.f - (deltaXAbs / view.getWidth());
     82         long duration = Math.abs((int) ((1 - fractionCovered) * 200 * mSpeedFactor));
     83 
     84         // Animate position and alpha of swiped item
     85 
     86         ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(view,
     87                 PropertyValuesHolder.ofFloat("alpha", 1.f),
     88                 PropertyValuesHolder.ofFloat("translationX", 0.f),
     89                 PropertyValuesHolder.ofFloat("rotationY", 0.f));
     90 
     91         animator.setDuration(duration).setInterpolator(new BounceInterpolator());
     92 
     93         return  animator;
     94     }
     95 
     96     @TargetApi(Build.VERSION_CODES.HONEYCOMB)
     97     @Override
     98     public ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY){
     99 
    100         float endX;
    101         float endRotationY;
    102 
    103         float deltaXAbs = Math.abs(deltaX);
    104 
    105         float fractionCovered = 1.f - (deltaXAbs / view.getWidth());
    106         long duration = Math.abs((int) ((1 - fractionCovered) * 200 * mSpeedFactor));
    107 
    108         endX = deltaX < 0 ? -view.getWidth() : view.getWidth();
    109         if (deltaX > 0)
    110             endRotationY = -15.f;
    111         else
    112             endRotationY = 15.f;
    113 
    114         // Animate position and alpha of swiped item
    115         return ObjectAnimator.ofPropertyValuesHolder(view,
    116                 PropertyValuesHolder.ofFloat("alpha", 0.f),
    117                 PropertyValuesHolder.ofFloat("translationX", endX),
    118                 PropertyValuesHolder.ofFloat("rotationY", endRotationY)).setDuration(duration);
    119 
    120     }
    121 
    122 }
    123