1/*
2 * Copyright (C) 2011 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
17package com.android.email.activity;
18
19import android.app.AlertDialog;
20import android.app.Dialog;
21import android.app.DialogFragment;
22import android.app.Fragment;
23import android.app.LoaderManager;
24import android.content.Context;
25import android.content.CursorLoader;
26import android.content.DialogInterface;
27import android.content.Loader;
28import android.database.Cursor;
29import android.os.Bundle;
30import android.view.LayoutInflater;
31import android.view.View;
32import android.widget.AdapterView;
33import android.widget.AdapterView.OnItemClickListener;
34import android.widget.ListView;
35import android.widget.SimpleCursorAdapter;
36
37import com.android.email.R;
38import com.android.mail.providers.Account;
39import com.android.mail.providers.UIProvider;
40
41/**
42 * Dialog which lists QuickResponses for the specified account. On user selection, will call
43 * Callback.onQuickResponseSelected() with the selected QuickResponse text.
44 */
45public class InsertQuickResponseDialog extends DialogFragment {
46    // Key for the Account object in the arguments bundle
47    private static final String ACCOUNT_KEY = "account";
48
49    /**
50     * Callback interface for when user selects a QuickResponse.
51     */
52    public interface Callback {
53        /**
54         * Handles the text of the selected QuickResponse.
55         */
56        public void onQuickResponseSelected(CharSequence quickResponse);
57    }
58
59    // Public no-args constructor needed for fragment re-instantiation
60    public InsertQuickResponseDialog() {}
61
62    /**
63     * Create and returns new dialog.
64     *
65     * @param callbackFragment fragment that implements {@link Callback}.  Or null, in which case
66     * the parent activity must implement {@link Callback}.
67     */
68    public static InsertQuickResponseDialog
69            newInstance(Fragment callbackFragment, Account account) {
70        final InsertQuickResponseDialog dialog = new InsertQuickResponseDialog();
71
72        // If a target is set, it MUST implement Callback. Fail-fast if not.
73        if (callbackFragment != null) {
74            if (!(callbackFragment instanceof Callback)) {
75                throw new ClassCastException(callbackFragment.toString()
76                        + " must implement Callback");
77            }
78            dialog.setTargetFragment(callbackFragment, 0);
79        }
80
81        Bundle args = new Bundle();
82        args.putParcelable(ACCOUNT_KEY, account);
83        dialog.setArguments(args);
84        return dialog;
85    }
86
87    @Override
88    public Dialog onCreateDialog(Bundle savedInstanceState) {
89        // If target not set, the parent activity MUST implement Callback. Fail-fast if not.
90        final Fragment targetFragment = getTargetFragment();
91        if (targetFragment != null) {
92            if (!(getActivity() instanceof Callback)) {
93                throw new ClassCastException(getActivity().toString() + " must implement Callback");
94            }
95        }
96
97        // Now that Callback implementation is verified, build the dialog
98        final Context context = getActivity();
99
100        final SimpleCursorAdapter adapter = new SimpleCursorAdapter(context,
101                R.layout.quick_response_item, null,
102                new String[] {UIProvider.QuickResponseColumns.TEXT},
103                new int[] {R.id.quick_response_text}, 0);
104
105        final AlertDialog.Builder builder = new AlertDialog.Builder(context);
106
107        // inflate the view to show in the dialog
108        final LayoutInflater li = LayoutInflater.from(builder.getContext());
109        final View quickResponsesView = li.inflate(R.layout.quick_responses, null);
110
111        // the view contains both a ListView and its associated empty view; wire them together
112        final ListView listView = (ListView) quickResponsesView.findViewById(R.id.quick_responses);
113        listView.setEmptyView(quickResponsesView.findViewById(R.id.quick_responses_empty_view));
114        listView.setAdapter(adapter);
115        listView.setOnItemClickListener(new OnItemClickListener() {
116            @Override
117            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
118                final Cursor c = (Cursor) listView.getItemAtPosition(position);
119                final String quickResponseText =
120                        c.getString(c.getColumnIndex(UIProvider.QuickResponseColumns.TEXT));
121                getCallback().onQuickResponseSelected(quickResponseText);
122                dismiss();
123            }
124        });
125
126        final Account account = getArguments().getParcelable(ACCOUNT_KEY);
127
128        getLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Cursor>() {
129            @Override
130            public Loader<Cursor> onCreateLoader(int id, Bundle args) {
131                return new CursorLoader(context, account.quickResponseUri,
132                        UIProvider.QUICK_RESPONSE_PROJECTION, null, null, null);
133            }
134
135            @Override
136            public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
137                adapter.swapCursor(data);
138            }
139
140            @Override
141            public void onLoaderReset(Loader<Cursor> loader) {
142                adapter.swapCursor(null);
143            }
144        });
145
146        final String dialogTitle = getResources()
147                .getString(R.string.message_compose_insert_quick_response_list_title);
148
149        return builder
150                .setTitle(dialogTitle)
151                .setView(quickResponsesView)
152                .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
153                    @Override
154                    public void onClick(DialogInterface dialog, int which) {
155                        dialog.cancel();
156                    }
157                })
158                .create();
159    }
160
161    private Callback getCallback() {
162        Fragment targetFragment = getTargetFragment();
163        if (targetFragment != null) {
164            return (Callback) targetFragment;
165        }
166        return (Callback) getActivity();
167    }
168}
169