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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 package com.example.android.batchstepsensor.cardstream;
     18 
     19 import android.animation.ObjectAnimator;
     20 import android.content.Context;
     21 import android.view.View;
     22 
     23 /**
     24  * An abstract class which defines animators for CardStreamLinearLayout.
     25  */
     26 abstract class CardStreamAnimator {
     27 
     28     protected float mSpeedFactor = 1.f;
     29 
     30     /**
     31      * Set speed factor of animations. Higher value means longer duration & slow animation.
     32      *
     33      * @param speedFactor speed type 1: SLOW, 2: NORMAL, 3:FAST
     34      */
     35     public void setSpeedFactor(float speedFactor) {
     36         mSpeedFactor = speedFactor;
     37     }
     38 
     39     /**
     40      * Define initial animation of each child which fired when a user rotate a screen.
     41      *
     42      * @param context
     43      * @return ObjectAnimator for initial animation
     44      */
     45     public abstract ObjectAnimator getInitalAnimator(Context context);
     46 
     47     /**
     48      * Define disappearing animation of a child which fired when a view is removed programmatically
     49      *
     50      * @param context
     51      * @return ObjectAnimator for disappearing animation
     52      */
     53     public abstract ObjectAnimator getDisappearingAnimator(Context context);
     54 
     55     /**
     56      * Define appearing animation of a child which fired when a view is added programmatically
     57      *
     58      * @param context
     59      * @return ObjectAnimator for appearing animation
     60      */
     61     public abstract ObjectAnimator getAppearingAnimator(Context context);
     62 
     63     /**
     64      * Define swipe-in (back to the origin position) animation of a child
     65      * which fired when a view is not moved enough to be removed.
     66      *
     67      * @param view   target view
     68      * @param deltaX delta distance by x-axis
     69      * @param deltaY delta distance by y-axis
     70      * @return ObjectAnimator for swipe-in animation
     71      */
     72     public abstract ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY);
     73 
     74     /**
     75      * Define swipe-out animation of a child
     76      * which fired when a view is removing by a user swipe action.
     77      *
     78      * @param view   target view
     79      * @param deltaX delta distance by x-axis
     80      * @param deltaY delta distance by y-axis
     81      * @return ObjectAnimator for swipe-out animation
     82      */
     83     public abstract ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY);
     84 
     85     /**
     86      * A simple CardStreamAnimator implementation which is used to turn animations off.
     87      */
     88     public static class EmptyAnimator extends CardStreamAnimator {
     89 
     90         @Override
     91         public ObjectAnimator getInitalAnimator(Context context) {
     92             return null;
     93         }
     94 
     95         @Override
     96         public ObjectAnimator getDisappearingAnimator(Context context) {
     97             return null;
     98         }
     99 
    100         @Override
    101         public ObjectAnimator getAppearingAnimator(Context context) {
    102             return null;
    103         }
    104 
    105         @Override
    106         public ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY) {
    107             return null;
    108         }
    109 
    110         @Override
    111         public ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY) {
    112             return null;
    113         }
    114     }
    115 
    116 }
    117 
    118