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