1/*
2 * Copyright (C) 2007 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.contacts.datepicker;
18
19// This is a fork of the standard Android DatePicker that additionally allows toggling the year
20// on/off.
21
22import android.app.AlertDialog;
23import android.content.Context;
24import android.content.DialogInterface;
25import android.content.DialogInterface.OnClickListener;
26import android.os.Bundle;
27import android.view.LayoutInflater;
28import android.view.View;
29
30import com.android.contacts.R;
31import com.android.contacts.datepicker.DatePicker.OnDateChangedListener;
32import com.android.contacts.util.DateUtils;
33
34import java.text.DateFormat;
35import java.util.Calendar;
36
37/**
38 * A simple dialog containing an {@link DatePicker}.
39 *
40 * <p>See the <a href="{@docRoot}resources/tutorials/views/hello-datepicker.html">Date Picker
41 * tutorial</a>.</p>
42 */
43public class DatePickerDialog extends AlertDialog implements OnClickListener,
44        OnDateChangedListener {
45
46    /** Magic year that represents "no year" */
47    public static int NO_YEAR = DatePicker.NO_YEAR;
48
49    private static final String YEAR = "year";
50    private static final String MONTH = "month";
51    private static final String DAY = "day";
52    private static final String YEAR_OPTIONAL = "year_optional";
53
54    private final DatePicker mDatePicker;
55    private final OnDateSetListener mCallBack;
56    private final DateFormat mTitleDateFormat;
57    private final DateFormat mTitleNoYearDateFormat;
58
59    private int mInitialYear;
60    private int mInitialMonth;
61    private int mInitialDay;
62
63    /**
64     * The callback used to indicate the user is done filling in the date.
65     */
66    public interface OnDateSetListener {
67        /**
68         * @param view The view associated with this listener.
69         * @param year The year that was set or {@link DatePickerDialog#NO_YEAR} if the user has
70         *  not specified a year
71         * @param monthOfYear The month that was set (0-11) for compatibility
72         *  with {@link java.util.Calendar}.
73         * @param dayOfMonth The day of the month that was set.
74         */
75        void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth);
76    }
77
78    /**
79     * @param context The context the dialog is to run in.
80     * @param callBack How the parent is notified that the date is set.
81     * @param year The initial year of the dialog or {@link DatePickerDialog#NO_YEAR} if no year
82     *  has been specified
83     * @param monthOfYear The initial month of the dialog.
84     * @param dayOfMonth The initial day of the dialog.
85     * @param yearOptional Whether the year can be toggled by the user
86     */
87    public DatePickerDialog(Context context,
88            OnDateSetListener callBack,
89            int year,
90            int monthOfYear,
91            int dayOfMonth,
92            boolean yearOptional) {
93        // Don't pass a theme id. Instead use the default alert dialog theme.
94        this(context, /* themeId = */ 0, callBack, year, monthOfYear, dayOfMonth,
95                yearOptional);
96    }
97
98    /**
99     * @param context The context the dialog is to run in.
100     * @param theme the theme to apply to this dialog
101     * @param callBack How the parent is notified that the date is set.
102     * @param year The initial year of the dialog or {@link DatePickerDialog#NO_YEAR} if no
103     *  year has been specified.
104     * @param monthOfYear The initial month of the dialog.
105     * @param dayOfMonth The initial day of the dialog.
106     * @param yearOptional Whether the year can be toggled by the user
107     */
108    public DatePickerDialog(Context context,
109            int theme,
110            OnDateSetListener callBack,
111            int year,
112            int monthOfYear,
113            int dayOfMonth,
114            boolean yearOptional) {
115        super(context, theme);
116
117        mCallBack = callBack;
118        mInitialYear = year;
119        mInitialMonth = monthOfYear;
120        mInitialDay = dayOfMonth;
121
122        mTitleDateFormat = DateFormat.getDateInstance(DateFormat.FULL);
123        mTitleNoYearDateFormat = DateUtils.getLocalizedDateFormatWithoutYear(getContext());
124        updateTitle(mInitialYear, mInitialMonth, mInitialDay);
125
126        setButton(BUTTON_POSITIVE, context.getText(R.string.date_time_set),
127                this);
128        setButton(BUTTON_NEGATIVE, context.getText(android.R.string.cancel),
129                (OnClickListener) null);
130
131        LayoutInflater inflater =
132                (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
133        View view = inflater.inflate(R.layout.date_picker_dialog, null);
134        setView(view);
135        mDatePicker = (DatePicker) view.findViewById(R.id.datePicker);
136        mDatePicker.init(mInitialYear, mInitialMonth, mInitialDay, yearOptional, this);
137    }
138
139    @Override
140    public void onClick(DialogInterface dialog, int which) {
141        if (mCallBack != null) {
142            mDatePicker.clearFocus();
143            mCallBack.onDateSet(mDatePicker, mDatePicker.getYear(),
144                    mDatePicker.getMonth(), mDatePicker.getDayOfMonth());
145        }
146    }
147
148    @Override
149    public void onDateChanged(DatePicker view, int year, int month, int day) {
150        updateTitle(year, month, day);
151    }
152
153    private void updateTitle(int year, int month, int day) {
154        final Calendar calendar = Calendar.getInstance();
155        calendar.set(Calendar.YEAR, year);
156        calendar.set(Calendar.MONTH, month);
157        calendar.set(Calendar.DAY_OF_MONTH, day);
158        final DateFormat dateFormat =
159                year == NO_YEAR ? mTitleNoYearDateFormat : mTitleDateFormat;
160        setTitle(dateFormat.format(calendar.getTime()));
161    }
162
163    @Override
164    public Bundle onSaveInstanceState() {
165        Bundle state = super.onSaveInstanceState();
166        state.putInt(YEAR, mDatePicker.getYear());
167        state.putInt(MONTH, mDatePicker.getMonth());
168        state.putInt(DAY, mDatePicker.getDayOfMonth());
169        state.putBoolean(YEAR_OPTIONAL, mDatePicker.isYearOptional());
170        return state;
171    }
172
173    @Override
174    public void onRestoreInstanceState(Bundle savedInstanceState) {
175        super.onRestoreInstanceState(savedInstanceState);
176        int year = savedInstanceState.getInt(YEAR);
177        int month = savedInstanceState.getInt(MONTH);
178        int day = savedInstanceState.getInt(DAY);
179        boolean yearOptional = savedInstanceState.getBoolean(YEAR_OPTIONAL);
180        mDatePicker.init(year, month, day, yearOptional, this);
181        updateTitle(year, month, day);
182    }
183}
184