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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.dialog;
     18 
     19 import android.app.Activity;
     20 import android.app.Dialog;
     21 import android.app.DialogFragment;
     22 import android.content.Context;
     23 import android.os.Bundle;
     24 import android.view.KeyEvent;
     25 
     26 import com.android.tv.MainActivity;
     27 import com.android.tv.TvApplication;
     28 import com.android.tv.analytics.HasTrackerLabel;
     29 import com.android.tv.analytics.Tracker;
     30 
     31 /**
     32  * Provides the safe dismiss feature regardless of the DialogFragment's life cycle.
     33  */
     34 public abstract class SafeDismissDialogFragment extends DialogFragment
     35         implements HasTrackerLabel {
     36     private MainActivity mActivity;
     37     private boolean mAttached = false;
     38     private boolean mDismissPending = false;
     39     private Tracker mTracker;
     40 
     41     @Override
     42     public Dialog onCreateDialog(Bundle savedInstanceState) {
     43         return new TvDialog(getActivity(), getTheme());
     44     }
     45 
     46     @Override
     47     public void onAttach(Activity activity) {
     48         super.onAttach(activity);
     49         mAttached = true;
     50         mActivity = (MainActivity) activity;
     51         mTracker = TvApplication.getSingletons(activity).getTracker();
     52         if (mDismissPending) {
     53             mDismissPending = false;
     54             dismiss();
     55         }
     56     }
     57 
     58     @Override
     59     public void onResume() {
     60         super.onResume();
     61         mTracker.sendScreenView(getTrackerLabel());
     62     }
     63 
     64     @Override
     65     public void onDestroy() {
     66         if (mActivity != null) {
     67             mActivity.getOverlayManager().onDialogDestroyed();
     68         }
     69         super.onDestroy();
     70     }
     71 
     72     @Override
     73     public void onDetach() {
     74         super.onDetach();
     75         mAttached = false;
     76         mTracker = null;
     77     }
     78 
     79     /**
     80      * Dismiss safely regardless of the DialogFragment's life cycle.
     81      */
     82     @Override
     83     public void dismiss() {
     84         if (!mAttached) {
     85             // dismiss() before getFragmentManager() is set cause NPE in dismissInternal().
     86             // FragmentManager is set when a fragment is used in a transaction,
     87             // so wait here until we can dismiss safely.
     88             mDismissPending = true;
     89         } else {
     90             super.dismiss();
     91         }
     92     }
     93 
     94     protected class TvDialog extends Dialog {
     95         public TvDialog(Context context, int theme) {
     96             super(context, theme);
     97         }
     98 
     99         @Override
    100         public boolean onKeyUp(int keyCode, KeyEvent event) {
    101             // When a dialog is showing, key events are handled by the dialog instead of
    102             // MainActivity. Therefore, unless a key is a global key, it should be handled here.
    103             if (mAttached && keyCode == KeyEvent.KEYCODE_SEARCH) {
    104                 mActivity.showSearchActivity();
    105                 return true;
    106             }
    107             return super.onKeyUp(keyCode, event);
    108         }
    109     }
    110 }
    111