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
getDisappearingAnimator(Context context)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
getAppearingAnimator(Context context)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
getInitalAnimator(Context context)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
getSwipeInAnimator(View view, float deltaX, float deltaY)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
getSwipeOutAnimator(View view, float deltaX, float deltaY)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