1/*
2 * Copyright (C) 2015 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 */
16package android.databinding.adapters;
17
18import android.databinding.BindingAdapter;
19import android.databinding.InverseBindingListener;
20import android.databinding.InverseBindingMethod;
21import android.databinding.InverseBindingMethods;
22import android.widget.DatePicker;
23import android.widget.DatePicker.OnDateChangedListener;
24import com.android.databinding.library.baseAdapters.R;
25
26@InverseBindingMethods({
27        @InverseBindingMethod(type = DatePicker.class, attribute = "android:year"),
28        @InverseBindingMethod(type = DatePicker.class, attribute = "android:month"),
29        @InverseBindingMethod(type = DatePicker.class, attribute = "android:day", method = "getDayOfMonth"),
30})
31public class DatePickerBindingAdapter {
32    @BindingAdapter(value = {"android:year", "android:month", "android:day",
33            "android:onDateChanged", "android:yearAttrChanged",
34            "android:monthAttrChanged", "android:dayAttrChanged"}, requireAll = false)
35    public static void setListeners(DatePicker view, int year, int month, int day,
36            final OnDateChangedListener listener, final InverseBindingListener yearChanged,
37            final InverseBindingListener monthChanged, final InverseBindingListener dayChanged) {
38        if (year == 0) {
39            year = view.getYear();
40        }
41        if (day == 0) {
42            day = view.getDayOfMonth();
43        }
44        if (yearChanged == null && monthChanged == null && dayChanged == null) {
45            view.init(year, month, day, listener);
46        } else {
47            DateChangedListener oldListener = ListenerUtil.getListener(view, R.id.onDateChanged);
48            if (oldListener == null) {
49                oldListener = new DateChangedListener();
50                ListenerUtil.trackListener(view, oldListener, R.id.onDateChanged);
51            }
52            oldListener.setListeners(listener, yearChanged, monthChanged, dayChanged);
53            view.init(year, month, day, oldListener);
54        }
55    }
56
57    private static class DateChangedListener implements OnDateChangedListener {
58        OnDateChangedListener mListener;
59        InverseBindingListener mYearChanged;
60        InverseBindingListener mMonthChanged;
61        InverseBindingListener mDayChanged;
62
63        public void setListeners(OnDateChangedListener listener, InverseBindingListener yearChanged,
64                InverseBindingListener monthChanged, InverseBindingListener dayChanged) {
65            mListener = listener;
66            mYearChanged = yearChanged;
67            mMonthChanged = monthChanged;
68            mDayChanged = dayChanged;
69        }
70
71        @Override
72        public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
73            if (mListener != null) {
74                mListener.onDateChanged(view, year, monthOfYear, dayOfMonth);
75            }
76            if (mYearChanged != null) {
77                mYearChanged.onChange();
78            }
79            if (mMonthChanged != null) {
80                mMonthChanged.onChange();
81            }
82            if (mDayChanged != null) {
83                mDayChanged.onChange();
84            }
85        }
86    }
87}
88