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      1 /*
      2  * Copyright (C) 2016 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.settings;
     18 
     19 import android.app.Activity;
     20 import android.app.Fragment;
     21 import android.os.Bundle;
     22 import android.support.annotation.Nullable;
     23 import android.transition.Scene;
     24 import android.transition.Slide;
     25 import android.transition.Transition;
     26 import android.transition.TransitionManager;
     27 import android.view.Gravity;
     28 import android.view.ViewGroup;
     29 import android.view.ViewTreeObserver;
     30 
     31 public abstract class TvSettingsActivity extends Activity {
     32 
     33     private static final String SETTINGS_FRAGMENT_TAG =
     34             "com.android.tv.settings.MainSettings.SETTINGS_FRAGMENT";
     35 
     36     @Override
     37     protected void onCreate(@Nullable Bundle savedInstanceState) {
     38         super.onCreate(savedInstanceState);
     39         if (savedInstanceState == null) {
     40 
     41             final ViewGroup root = (ViewGroup) findViewById(android.R.id.content);
     42             root.getViewTreeObserver().addOnPreDrawListener(
     43                     new ViewTreeObserver.OnPreDrawListener() {
     44                         @Override
     45                         public boolean onPreDraw() {
     46                             root.getViewTreeObserver().removeOnPreDrawListener(this);
     47                             final Scene scene = new Scene(root);
     48                             scene.setEnterAction(new Runnable() {
     49                                 @Override
     50                                 public void run() {
     51                                     final Fragment fragment = createSettingsFragment();
     52                                     if (fragment != null) {
     53                                         getFragmentManager().beginTransaction()
     54                                                 .add(android.R.id.content, fragment,
     55                                                         SETTINGS_FRAGMENT_TAG)
     56                                                 .commitNow();
     57                                     }
     58                                 }
     59                             });
     60 
     61                             final Slide slide = new Slide(Gravity.END);
     62                             slide.setSlideFraction(
     63                                     getResources().getDimension(R.dimen.lb_settings_pane_width)
     64                                             / root.getWidth());
     65                             TransitionManager.go(scene, slide);
     66 
     67                             // Skip the current draw, there's nothing in it
     68                             return false;
     69                         }
     70                     });
     71         }
     72     }
     73 
     74     @Override
     75     public void finish() {
     76         final Fragment fragment = getFragmentManager().findFragmentByTag(SETTINGS_FRAGMENT_TAG);
     77         if (isResumed() && fragment != null) {
     78             final ViewGroup root = (ViewGroup) findViewById(android.R.id.content);
     79             final Scene scene = new Scene(root);
     80             scene.setEnterAction(new Runnable() {
     81                 @Override
     82                 public void run() {
     83                     getFragmentManager().beginTransaction()
     84                             .remove(fragment)
     85                             .commitNow();
     86                 }
     87             });
     88             final Slide slide = new Slide(Gravity.END);
     89             slide.setSlideFraction(
     90                     getResources().getDimension(R.dimen.lb_settings_pane_width) / root.getWidth());
     91             slide.addListener(new Transition.TransitionListener() {
     92                 @Override
     93                 public void onTransitionStart(Transition transition) {
     94                     getWindow().setDimAmount(0);
     95                 }
     96 
     97                 @Override
     98                 public void onTransitionEnd(Transition transition) {
     99                     transition.removeListener(this);
    100                     TvSettingsActivity.super.finish();
    101                 }
    102 
    103                 @Override
    104                 public void onTransitionCancel(Transition transition) {
    105                 }
    106 
    107                 @Override
    108                 public void onTransitionPause(Transition transition) {
    109                 }
    110 
    111                 @Override
    112                 public void onTransitionResume(Transition transition) {
    113                 }
    114             });
    115             TransitionManager.go(scene, slide);
    116         } else {
    117             super.finish();
    118         }
    119     }
    120 
    121     protected abstract Fragment createSettingsFragment();
    122 }
    123