Home | History | Annotate | Download | only in ui 
      1 /*
      2  * Copyright (C) 2012 Google Inc.
      3  * Licensed to The Android Open Source Project.
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 package com.android.mail.ui;
     19 
     20 import android.app.AlertDialog;
     21 import android.content.Context;
     22 import android.content.DialogInterface;
     23 import android.content.DialogInterface.OnClickListener;
     24 import android.content.DialogInterface.OnDismissListener;
     25 import android.os.AsyncTask;
     26 import android.view.View;
     27 import android.widget.AdapterView;
     28 
     29 import com.android.mail.R;
     30 import com.android.mail.providers.Account;
     31 import com.android.mail.providers.Conversation;
     32 import com.android.mail.providers.Folder;
     33 import com.android.mail.providers.UIProvider;
     34 import com.android.mail.utils.LogTag;
     35 import com.android.mail.utils.LogUtils;
     36 
     37 import java.util.Collection;
     38 
     39 public abstract class FolderSelectionDialog implements OnClickListener, OnDismissListener {
     40     protected static final String LOG_TAG = LogTag.getLogTag();
     41     private static boolean sDialogShown;
     42 
     43     protected AlertDialog mDialog;
     44     protected final ConversationUpdater mUpdater;
     45     protected final SeparatedFolderListAdapter mAdapter;
     46     protected final Collection<Conversation> mTarget;
     47     protected final boolean mBatch;
     48     protected final QueryRunner mRunner;
     49     protected final Account mAccount;
     50     protected final AlertDialog.Builder mBuilder;
     51     protected final Folder mCurrentFolder;
     52 
     53     public static FolderSelectionDialog getInstance(final Context context, final Account account,
     54             final ConversationUpdater updater, final Collection<Conversation> target,
     55             final boolean isBatch, final Folder currentFolder, final boolean isMoveTo) {
     56         if (sDialogShown) {
     57             return null;
     58         }
     59 
     60         /*
     61          * TODO: This method should only be called with isMoveTo=true if this capability is not
     62          * present on the account, so we should be able to remove the check here.
     63          */
     64         if (isMoveTo || !account.supportsCapability(
     65                 UIProvider.AccountCapabilities.MULTIPLE_FOLDERS_PER_CONV)) {
     66             return new SingleFolderSelectionDialog(
     67                     context, account, updater, target, isBatch, currentFolder);
     68         } else {
     69             return new MultiFoldersSelectionDialog(
     70                     context, account, updater, target, isBatch, currentFolder);
     71         }
     72     }
     73 
     74     public static void setDialogDismissed() {
     75         LogUtils.d(LOG_TAG, "Folder Selection dialog dismissed");
     76         sDialogShown = false;
     77     }
     78 
     79     protected abstract void updateAdapterInBackground(Context context);
     80 
     81     protected abstract void onListItemClick(int position);
     82 
     83     protected FolderSelectionDialog(final Context context, final Account account,
     84             final ConversationUpdater updater, final Collection<Conversation> target,
     85             final boolean isBatch, final Folder currentFolder) {
     86         mUpdater = updater;
     87         mTarget = target;
     88         mBatch = isBatch;
     89 
     90         final AlertDialog.Builder builder = new AlertDialog.Builder(context);
     91         builder.setNegativeButton(R.string.cancel, this);
     92         mAccount = account;
     93         mBuilder = builder;
     94         mCurrentFolder = currentFolder;
     95         mAdapter = new SeparatedFolderListAdapter();
     96         mRunner = new QueryRunner(context);
     97     }
     98 
     99     public void show() {
    100         sDialogShown = true;
    101         mRunner.execute();
    102     }
    103 
    104     protected void showInternal() {
    105         mDialog.show();
    106         mDialog.setOnDismissListener(this);
    107         mDialog.getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
    108                 @Override
    109             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    110                 onListItemClick(position);
    111             }
    112         });
    113     }
    114 
    115     @Override
    116     public void onDismiss(DialogInterface dialog) {
    117         FolderSelectionDialog.setDialogDismissed();
    118     }
    119 
    120     /**
    121      * Class to query the Folder list database in the background and update the
    122      * adapter with an open cursor.
    123      */
    124     private class QueryRunner extends AsyncTask<Void, Void, Void> {
    125         private final Context mContext;
    126 
    127         private QueryRunner(final Context context) {
    128             mContext = context;
    129         }
    130 
    131         @Override
    132         protected Void doInBackground(Void... v) {
    133             updateAdapterInBackground(mContext);
    134             return null;
    135         }
    136 
    137         @Override
    138         protected void onPostExecute(Void v) {
    139             mDialog = mBuilder.create();
    140             showInternal();
    141         }
    142     }
    143 }
    144