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 
17 package com.android.calendar;
18 
19 import android.app.Activity;
20 import android.app.AlertDialog;
21 import android.content.DialogInterface;
22 import android.content.DialogInterface.OnDismissListener;
23 import android.widget.Button;
24 
25 /**
26  * A helper class for editing the response to an invitation when the invitation
27  * is a repeating event.
28  */
29 public class EditResponseHelper implements DialogInterface.OnClickListener, OnDismissListener {
30     private final Activity mParent;
31     private int mWhichEvents = -1;
32     private AlertDialog mAlertDialog;
33     private boolean mClickedOk = false;
34 
35     /**
36      * This callback is passed in to this object when this object is created
37      * and is invoked when the "Ok" button is selected.
38      */
39     private DialogInterface.OnClickListener mDialogListener;
40 
EditResponseHelper(Activity parent)41     public EditResponseHelper(Activity parent) {
42         mParent = parent;
43     }
44 
setOnClickListener(DialogInterface.OnClickListener listener)45     public void setOnClickListener(DialogInterface.OnClickListener listener) {
46         mDialogListener = listener;
47     }
48 
49     /**
50      * @return whichEvents, representing which events were selected on which to
51      * apply the response:
52      * -1 means no choice selected, or the dialog was
53      * canceled.
54      * 0 means just the single event.
55      * 1 means all events.
56      */
getWhichEvents()57     public int getWhichEvents() {
58         return mWhichEvents;
59     }
60 
setWhichEvents(int which)61     public void setWhichEvents(int which) {
62         mWhichEvents = which;
63     }
64 
65     @Override
onClick(DialogInterface dialog, int which)66     public void onClick(DialogInterface dialog, int which) {
67         setClickedOk(true);
68     }
69 
70     @Override
onDismiss(DialogInterface dialog)71     public void onDismiss(DialogInterface dialog) {
72         // If the click was not "OK", clear out whichEvents to represent
73         // that the dialog was canceled.
74         if (!getClickedOk()) {
75             setWhichEvents(-1);
76         }
77         setClickedOk(false);
78 
79         // Call the pre-set dismiss listener too.
80         if (mDismissListener != null) {
81             mDismissListener.onDismiss(dialog);
82         }
83 
84     }
85 
getClickedOk()86     private boolean getClickedOk() {
87         return mClickedOk;
88     }
89 
setClickedOk(boolean clickedOk)90     private void setClickedOk(boolean clickedOk) {
91         mClickedOk = clickedOk;
92     }
93 
94     /**
95      * This callback is used when a list item is selected
96      */
97     private DialogInterface.OnClickListener mListListener =
98             new DialogInterface.OnClickListener() {
99         public void onClick(DialogInterface dialog, int which) {
100             mWhichEvents = which;
101 
102             // Enable the "ok" button now that the user has selected which
103             // events in the series to delete.
104             Button ok = mAlertDialog.getButton(DialogInterface.BUTTON_POSITIVE);
105             ok.setEnabled(true);
106         }
107     };
108 
109     private DialogInterface.OnDismissListener mDismissListener;
110 
111 
112     /**
113      * Set the dismiss listener to be called when the dialog is ended. There,
114      * use getWhichEvents() to see how the dialog was dismissed; if it returns
115      * -1, the dialog was canceled out. If it is not -1, it's the index of
116      * which events the user wants to respond to.
117      * @param onDismissListener
118      */
setDismissListener(OnDismissListener onDismissListener)119     public void setDismissListener(OnDismissListener onDismissListener) {
120         mDismissListener = onDismissListener;
121     }
122 
showDialog(int whichEvents)123     public void showDialog(int whichEvents) {
124         // We need to have a non-null listener, otherwise we get null when
125         // we try to fetch the "Ok" button.
126         if (mDialogListener == null) {
127             mDialogListener = this;
128         }
129         AlertDialog dialog = new AlertDialog.Builder(mParent).setTitle(
130                 R.string.change_response_title).setIconAttribute(android.R.attr.alertDialogIcon)
131                 .setSingleChoiceItems(R.array.change_response_labels, whichEvents, mListListener)
132                 .setPositiveButton(android.R.string.ok, mDialogListener)
133                 .setNegativeButton(android.R.string.cancel, null).show();
134         // The caller may set a dismiss listener to hear back when the dialog is
135         // finished. Use getWhichEvents() to see how the dialog was dismissed.
136         dialog.setOnDismissListener(this);
137         mAlertDialog = dialog;
138 
139         if (whichEvents == -1) {
140             // Disable the "Ok" button until the user selects which events to
141             // delete.
142             Button ok = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
143             ok.setEnabled(false);
144         }
145     }
146 
dismissAlertDialog()147     public void dismissAlertDialog() {
148         if (mAlertDialog != null) {
149             mAlertDialog.dismiss();
150         }
151     }
152 
153 }
154