EditResponseHelper.java revision 146de36083f6ce8b7e8a1f974d3990594a36bfec 
1/*
2 * Copyright (C) 2009 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.calendar;
18
19import android.app.Activity;
20import android.app.AlertDialog;
21import android.content.DialogInterface;
22import android.widget.Button;
23
24/**
25 * A helper class for editing the response to an invitation when the invitation
26 * is a repeating event.
27 */
28public class EditResponseHelper implements DialogInterface.OnClickListener {
29    private final Activity mParent;
30    private int mWhichEvents = -1;
31    private AlertDialog mAlertDialog;
32
33    /**
34     * This callback is passed in to this object when this object is created
35     * and is invoked when the "Ok" button is selected.
36     */
37    private DialogInterface.OnClickListener mDialogListener;
38
39    public EditResponseHelper(Activity parent) {
40        mParent = parent;
41    }
42
43    public void setOnClickListener(DialogInterface.OnClickListener listener) {
44        mDialogListener = listener;
45    }
46
47    public int getWhichEvents() {
48        return mWhichEvents;
49    }
50
51    public void onClick(DialogInterface dialog, int which) {
52    }
53
54    /**
55     * This callback is used when a list item is selected
56     */
57    private DialogInterface.OnClickListener mListListener =
58            new DialogInterface.OnClickListener() {
59        public void onClick(DialogInterface dialog, int which) {
60            mWhichEvents = which;
61
62            // Enable the "ok" button now that the user has selected which
63            // events in the series to delete.
64            Button ok = mAlertDialog.getButton(DialogInterface.BUTTON_POSITIVE);
65            ok.setEnabled(true);
66        }
67    };
68
69    public void showDialog(int whichEvents) {
70        // We need to have a non-null listener, otherwise we get null when
71        // we try to fetch the "Ok" button.
72        if (mDialogListener == null) {
73            mDialogListener = this;
74        }
75        AlertDialog dialog = new AlertDialog.Builder(mParent)
76                .setTitle(R.string.change_response_title)
77                .setIcon(android.R.drawable.ic_dialog_alert)
78                .setSingleChoiceItems(R.array.change_response_labels, whichEvents,
79                        mListListener)
80                .setPositiveButton(android.R.string.ok, mDialogListener)
81                .setNegativeButton(android.R.string.cancel, null)
82                .show();
83        mAlertDialog = dialog;
84
85        if (whichEvents == -1) {
86            // Disable the "Ok" button until the user selects which events to
87            // delete.
88            Button ok = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
89            ok.setEnabled(false);
90        }
91    }
92}
93