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      1 /*
      2  * Copyright (C) 2015 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.android.tv.ui;
     18 
     19 import android.animation.TimeInterpolator;
     20 import android.app.Dialog;
     21 import android.content.Context;
     22 import android.os.Handler;
     23 import android.util.AttributeSet;
     24 import android.util.Log;
     25 import android.view.View;
     26 import android.view.ViewTreeObserver;
     27 import android.view.animation.AnimationUtils;
     28 import android.widget.FrameLayout;
     29 
     30 import com.android.tv.MainActivity;
     31 import com.android.tv.R;
     32 import com.android.tv.dialog.FullscreenDialogFragment;
     33 
     34 public class FullscreenDialogView extends FrameLayout
     35         implements FullscreenDialogFragment.DialogView {
     36     private static final String TAG = "FullscreenDialogView";
     37     private static final boolean DEBUG = false;
     38 
     39     private static final int FADE_IN_DURATION_MS = 400;
     40     private static final int FADE_OUT_DURATION_MS = 250;
     41     private static final int TRANSITION_INTERVAL_MS = 300;
     42 
     43     private MainActivity mActivity;
     44     private Dialog mDialog;
     45     private boolean mSkipEnterAlphaAnimation;
     46     private boolean mSkipExitAlphaAnimation;
     47 
     48     private final TimeInterpolator mLinearOutSlowIn;
     49     private final TimeInterpolator mFastOutLinearIn;
     50 
     51     public FullscreenDialogView(Context context) {
     52         this(context, null, 0);
     53     }
     54 
     55     public FullscreenDialogView(Context context, AttributeSet attrs) {
     56         this(context, attrs, 0);
     57     }
     58 
     59     public FullscreenDialogView(Context context, AttributeSet attrs, int defStyle) {
     60         super(context, attrs, defStyle);
     61         mLinearOutSlowIn = AnimationUtils.loadInterpolator(context,
     62                 android.R.interpolator.linear_out_slow_in);
     63         mFastOutLinearIn = AnimationUtils.loadInterpolator(context,
     64                 android.R.interpolator.fast_out_linear_in);
     65         getViewTreeObserver().addOnGlobalLayoutListener(
     66                 new ViewTreeObserver.OnGlobalLayoutListener() {
     67                     @Override
     68                     public void onGlobalLayout() {
     69                         getViewTreeObserver().removeOnGlobalLayoutListener(this);
     70                         startEnterAnimation();
     71                     }
     72                 });
     73     }
     74 
     75     protected MainActivity getActivity() {
     76         return mActivity;
     77     }
     78 
     79     /**
     80      * Gets the host {@link Dialog}.
     81      */
     82     protected Dialog getDialog() {
     83         return mDialog;
     84     }
     85 
     86     /**
     87      * Dismisses the host {@link Dialog}.
     88      */
     89     protected void dismiss() {
     90         startExitAnimation(new Runnable() {
     91             @Override
     92             public void run() {
     93                 mDialog.dismiss();
     94             }
     95         });
     96     }
     97 
     98     @Override
     99     public void initialize(MainActivity activity, Dialog dialog) {
    100         mActivity = activity;
    101         mDialog = dialog;
    102     }
    103 
    104     @Override
    105     public void onBackPressed() { }
    106 
    107     @Override
    108     public void onDestroy() { }
    109 
    110     /**
    111      * Transitions to another view inside the host {@link Dialog}.
    112      */
    113     public void transitionTo(final FullscreenDialogView v) {
    114         mSkipExitAlphaAnimation = true;
    115         v.mSkipEnterAlphaAnimation = true;
    116         v.initialize(mActivity, mDialog);
    117         startExitAnimation(new Runnable() {
    118             @Override
    119             public void run() {
    120                 new Handler().postDelayed(new Runnable() {
    121                     @Override
    122                     public void run() {
    123                         v.initialize(getActivity(), getDialog());
    124                         getDialog().setContentView(v);
    125                     }
    126                 }, TRANSITION_INTERVAL_MS);
    127             }
    128         });
    129     }
    130 
    131     /**
    132      * Called when an enter animation starts. Sub-view specific animation can be implemented.
    133      */
    134     protected void onStartEnterAnimation(TimeInterpolator interpolator, long duration) {
    135     }
    136 
    137     /**
    138      * Called when an exit animation starts. Sub-view specific animation can be implemented.
    139      */
    140     protected void onStartExitAnimation(TimeInterpolator interpolator, long duration,
    141             Runnable onAnimationEnded) {
    142     }
    143 
    144     private void startEnterAnimation() {
    145         if (DEBUG) Log.d(TAG, "start an enter animation");
    146         View backgroundView = findViewById(R.id.background);
    147         if (!mSkipEnterAlphaAnimation) {
    148             backgroundView.setAlpha(0);
    149             backgroundView.animate()
    150                     .alpha(1.0f)
    151                     .setInterpolator(mLinearOutSlowIn)
    152                     .setDuration(FADE_IN_DURATION_MS)
    153                     .withLayer()
    154                     .start();
    155         }
    156         onStartEnterAnimation(mLinearOutSlowIn, FADE_IN_DURATION_MS);
    157     }
    158 
    159     private void startExitAnimation(final Runnable onAnimationEnded) {
    160         if (DEBUG) Log.d(TAG, "start an exit animation");
    161         View backgroundView = findViewById(R.id.background);
    162         if (!mSkipExitAlphaAnimation) {
    163             backgroundView.animate()
    164                     .alpha(0.0f)
    165                     .setInterpolator(mFastOutLinearIn)
    166                     .setDuration(FADE_OUT_DURATION_MS)
    167                     .withLayer()
    168                     .start();
    169         }
    170         onStartExitAnimation(mFastOutLinearIn, FADE_OUT_DURATION_MS, onAnimationEnded);
    171     }
    172 }
    173