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      1 /*
      2  * Copyright (C) 2010 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.email.activity;
     18 
     19 import com.android.email.R;
     20 
     21 import android.app.AlertDialog;
     22 import android.app.Dialog;
     23 import android.app.DialogFragment;
     24 import android.app.Fragment;
     25 import android.content.Context;
     26 import android.content.DialogInterface;
     27 import android.content.res.Resources;
     28 import android.os.Bundle;
     29 
     30 /**
     31  * Confirmation dialog for deleting messages.
     32  */
     33 public class DeleteMessageConfirmationDialog extends DialogFragment
     34         implements DialogInterface.OnClickListener {
     35     private static final String COUNT_MESSAGES_ARG = "count_messages";
     36 
     37     public interface Callback {
     38         public void onDeleteMessageConfirmationDialogOkPressed();
     39     }
     40 
     41     /**
     42      * Create a new dialog.
     43      *
     44      * @param countMessage the number of messages to be deleted
     45      * @param callbackFragment fragment that implements {@link Callback}.  Or null, in which case
     46      * the parent activity must implement {@link Callback}.
     47      */
     48     public static DeleteMessageConfirmationDialog newInstance(int countMessage,
     49             Fragment callbackFragment) {
     50         final DeleteMessageConfirmationDialog dialog = new DeleteMessageConfirmationDialog();
     51         final Bundle args = new Bundle();
     52         args.putInt(COUNT_MESSAGES_ARG, countMessage);
     53         dialog.setArguments(args);
     54         if (callbackFragment != null) {
     55             dialog.setTargetFragment(callbackFragment, 0);
     56         }
     57         return dialog;
     58     }
     59 
     60     @Override
     61     public Dialog onCreateDialog(Bundle savedInstanceState) {
     62         final int countMessages = getArguments().getInt(COUNT_MESSAGES_ARG);
     63 
     64         final Context context = getActivity();
     65         final Resources res = context.getResources();
     66         final AlertDialog.Builder b = new AlertDialog.Builder(context);
     67         b.setTitle(res.getString(R.string.message_delete_dialog_title))
     68                 .setIconAttribute(android.R.attr.alertDialogIcon)
     69                 .setMessage(res.getQuantityString(R.plurals.message_delete_confirm, countMessages))
     70                 .setPositiveButton(R.string.okay_action, this)
     71                 .setNegativeButton(R.string.cancel_action, null);
     72         return b.create();
     73     }
     74 
     75     @Override
     76     public void onClick(DialogInterface dialog, int which) {
     77         switch (which) {
     78             case DialogInterface.BUTTON_POSITIVE:
     79                 getCallback().onDeleteMessageConfirmationDialogOkPressed();
     80                 break;
     81         }
     82     }
     83 
     84     private Callback getCallback() {
     85         Fragment targetFragment = getTargetFragment();
     86         if (targetFragment != null) {
     87             // If a target is set, it MUST implement Callback.
     88             return (Callback) targetFragment;
     89         }
     90         // If not the parent activity MUST implement Callback.
     91         return (Callback) getActivity();
     92     }
     93 }
     94