1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 package org.chromium.content.browser.input;
7 import android.content.Context;
8 import android.text.format.DateUtils;
9 import android.view.LayoutInflater;
10 import android.view.accessibility.AccessibilityEvent;
11 import android.widget.FrameLayout;
12 import android.widget.NumberPicker;
13 import android.widget.NumberPicker.OnValueChangeListener;
15 import org.chromium.content.R;
17 import java.util.Calendar;
18 import java.util.TimeZone;
21 * This class is heavily based on android.widget.DatePicker.
23 public abstract class TwoFieldDatePicker extends FrameLayout {
25 private final NumberPicker mPositionInYearSpinner;
27 private final NumberPicker mYearSpinner;
29 private OnMonthOrWeekChangedListener mMonthOrWeekChangedListener;
31 // It'd be nice to use android.text.Time like in other Dialogs but
32 // it suffers from the 2038 effect so it would prevent us from
33 // having dates over 2038.
34 private Calendar mMinDate;
36 private Calendar mMaxDate;
38 private Calendar mCurrentDate;
41 * The callback used to indicate the user changes\d the date.
43 public interface OnMonthOrWeekChangedListener {
46 * Called upon a date change.
48 * @param view The view associated with this listener.
49 * @param year The year that was set.
50 * @param positionInYear The month or week in year.
52 void onMonthOrWeekChanged(TwoFieldDatePicker view, int year, int positionInYear);
55 public TwoFieldDatePicker(Context context, double minValue, double maxValue) {
56 super(context, null, android.R.attr.datePickerStyle);
58 LayoutInflater inflater = (LayoutInflater) context
59 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
60 inflater.inflate(R.layout.two_field_date_picker, this, true);
62 OnValueChangeListener onChangeListener = new OnValueChangeListener() {
64 public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
66 int positionInYear = getPositionInYear();
67 // take care of wrapping of days and months to update greater fields
68 if (picker == mPositionInYearSpinner) {
69 positionInYear = newVal;
70 if (oldVal == picker.getMaxValue() && newVal == picker.getMinValue()) {
72 positionInYear = getMinPositionInYear(year);
73 } else if (oldVal == picker.getMinValue() && newVal == picker.getMaxValue()) {
75 positionInYear = getMaxPositionInYear(year);
77 } else if (picker == mYearSpinner) {
80 throw new IllegalArgumentException();
83 // now set the date to the adjusted one
84 setCurrentDate(year, positionInYear);
90 mCurrentDate = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
91 if (minValue >= maxValue) {
92 mMinDate = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
93 mMinDate.set(0, 0, 1);
94 mMaxDate = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
95 mMaxDate.set(9999, 0, 1);
97 mMinDate = getDateForValue(minValue);
98 mMaxDate = getDateForValue(maxValue);
102 mPositionInYearSpinner = (NumberPicker) findViewById(R.id.position_in_year);
103 mPositionInYearSpinner.setOnLongPressUpdateInterval(200);
104 mPositionInYearSpinner.setOnValueChangedListener(onChangeListener);
107 mYearSpinner = (NumberPicker) findViewById(R.id.year);
108 mYearSpinner.setOnLongPressUpdateInterval(100);
109 mYearSpinner.setOnValueChangedListener(onChangeListener);
113 * Initialize the state. If the provided values designate an inconsistent
114 * date the values are normalized before updating the spinners.
116 * @param year The initial year.
117 * @param positionInYear The initial month <strong>starting from zero</strong> or week in year.
118 * @param onMonthOrWeekChangedListener How user is notified date is changed by
121 public void init(int year, int positionInYear,
122 OnMonthOrWeekChangedListener onMonthOrWeekChangedListener) {
123 setCurrentDate(year, positionInYear);
125 mMonthOrWeekChangedListener = onMonthOrWeekChangedListener;
128 public boolean isNewDate(int year, int positionInYear) {
129 return (getYear() != year || getPositionInYear() != positionInYear);
133 * Subclasses know the semantics of @value, and need to return
134 * a Calendar corresponding to it.
136 protected abstract Calendar getDateForValue(double value);
139 * Updates the current date.
141 * @param year The year.
142 * @param positionInYear The month or week in year.
144 public void updateDate(int year, int positionInYear) {
145 if (!isNewDate(year, positionInYear)) {
148 setCurrentDate(year, positionInYear);
154 * Subclasses know the semantics of @positionInYear, and need to update @mCurrentDate to the
157 protected abstract void setCurrentDate(int year, int positionInYear);
159 protected void setCurrentDate(Calendar date) {
164 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
165 onPopulateAccessibilityEvent(event);
170 public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
171 super.onPopulateAccessibilityEvent(event);
173 final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR;
174 String selectedDateUtterance = DateUtils.formatDateTime(getContext(),
175 mCurrentDate.getTimeInMillis(), flags);
176 event.getText().add(selectedDateUtterance);
180 * @return The selected year.
182 public int getYear() {
183 return mCurrentDate.get(Calendar.YEAR);
187 * @return The selected month or week.
189 public abstract int getPositionInYear();
191 protected abstract int getMaxYear();
193 protected abstract int getMinYear();
195 protected abstract int getMaxPositionInYear(int year);
197 protected abstract int getMinPositionInYear(int year);
199 protected Calendar getMaxDate() {
203 protected Calendar getMinDate() {
207 protected Calendar getCurrentDate() {
211 protected NumberPicker getPositionInYearSpinner() {
212 return mPositionInYearSpinner;
215 protected NumberPicker getYearSpinner() {
220 * This method should be subclassed to update the spinners based on mCurrentDate.
222 protected void updateSpinners() {
223 mPositionInYearSpinner.setDisplayedValues(null);
225 // set the spinner ranges respecting the min and max dates
226 mPositionInYearSpinner.setMinValue(getMinPositionInYear(getYear()));
227 mPositionInYearSpinner.setMaxValue(getMaxPositionInYear(getYear()));
228 mPositionInYearSpinner.setWrapSelectorWheel(
229 !mCurrentDate.equals(mMinDate) && !mCurrentDate.equals(mMaxDate));
231 // year spinner range does not change based on the current date
232 mYearSpinner.setMinValue(getMinYear());
233 mYearSpinner.setMaxValue(getMaxYear());
234 mYearSpinner.setWrapSelectorWheel(false);
236 // set the spinner values
237 mYearSpinner.setValue(getYear());
238 mPositionInYearSpinner.setValue(getPositionInYear());
242 * Notifies the listener, if such, for a change in the selected date.
244 protected void notifyDateChanged() {
245 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED);
246 if (mMonthOrWeekChangedListener != null) {
247 mMonthOrWeekChangedListener.onMonthOrWeekChanged(this, getYear(), getPositionInYear());