Home | History | Annotate | Download | only in cardstream 
      1 <#ftl>
      2 <#--
      3         Copyright 2013 The Android Open Source Project
      4 
      5         Licensed under the Apache License, Version 2.0 (the "License");
      6         you may not use this file except in compliance with the License.
      7         You may obtain a copy of the License at
      8 
      9         http://www.apache.org/licenses/LICENSE-2.0
     10 
     11         Unless required by applicable law or agreed to in writing, software
     12         distributed under the License is distributed on an "AS IS" BASIS,
     13         WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14         See the License for the specific language governing permissions and
     15         limitations under the License.
     16 -->
     17 
     18 package ${sample.package}.cardstream;
     19 
     20 import android.animation.ObjectAnimator;
     21 import android.content.Context;
     22 import android.view.View;
     23 
     24 /**
     25  * An abstract class which defines animators for CardStreamLinearLayout.
     26  */
     27 abstract class CardStreamAnimator {
     28 
     29     protected float mSpeedFactor = 1.f;
     30 
     31     /**
     32      * Set speed factor of animations. Higher value means longer duration & slow animation.
     33      *
     34      * @param speedFactor speed type 1: SLOW, 2: NORMAL, 3:FAST
     35      */
     36     public void setSpeedFactor(float speedFactor) {
     37         mSpeedFactor = speedFactor;
     38     }
     39 
     40     /**
     41      * Define initial animation of each child which fired when a user rotate a screen.
     42      *
     43      * @param context
     44      * @return ObjectAnimator for initial animation
     45      */
     46     public abstract ObjectAnimator getInitalAnimator(Context context);
     47 
     48     /**
     49      * Define disappearing animation of a child which fired when a view is removed programmatically
     50      *
     51      * @param context
     52      * @return ObjectAnimator for disappearing animation
     53      */
     54     public abstract ObjectAnimator getDisappearingAnimator(Context context);
     55 
     56     /**
     57      * Define appearing animation of a child which fired when a view is added programmatically
     58      *
     59      * @param context
     60      * @return ObjectAnimator for appearing animation
     61      */
     62     public abstract ObjectAnimator getAppearingAnimator(Context context);
     63 
     64     /**
     65      * Define swipe-in (back to the origin position) animation of a child
     66      * which fired when a view is not moved enough to be removed.
     67      *
     68      * @param view   target view
     69      * @param deltaX delta distance by x-axis
     70      * @param deltaY delta distance by y-axis
     71      * @return ObjectAnimator for swipe-in animation
     72      */
     73     public abstract ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY);
     74 
     75     /**
     76      * Define swipe-out animation of a child
     77      * which fired when a view is removing by a user swipe action.
     78      *
     79      * @param view   target view
     80      * @param deltaX delta distance by x-axis
     81      * @param deltaY delta distance by y-axis
     82      * @return ObjectAnimator for swipe-out animation
     83      */
     84     public abstract ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY);
     85 
     86     /**
     87      * A simple CardStreamAnimator implementation which is used to turn animations off.
     88      */
     89     public static class EmptyAnimator extends CardStreamAnimator {
     90 
     91         @Override
     92         public ObjectAnimator getInitalAnimator(Context context) {
     93             return null;
     94         }
     95 
     96         @Override
     97         public ObjectAnimator getDisappearingAnimator(Context context) {
     98             return null;
     99         }
    100 
    101         @Override
    102         public ObjectAnimator getAppearingAnimator(Context context) {
    103             return null;
    104         }
    105 
    106         @Override
    107         public ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY) {
    108             return null;
    109         }
    110 
    111         @Override
    112         public ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY) {
    113             return null;
    114         }
    115     }
    116 
    117 }
    118 
    119