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