/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.holoeverywhere.widget.datetimepicker.date;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.view.ViewCompat;
import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
import android.text.format.DateFormat;
import android.text.format.DateUtils;
import android.text.format.Time;
import android.util.AttributeSet;
import android.util.SparseArray;
import android.view.MotionEvent;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
import org.holoeverywhere.FontLoader;
import org.holoeverywhere.R;
import org.holoeverywhere.widget.datetimepicker.DateTimePickerUtils;
import org.holoeverywhere.widget.datetimepicker.TouchExplorationHelper;
import org.holoeverywhere.widget.datetimepicker.date.SimpleMonthAdapter.CalendarDay;
import java.security.InvalidParameterException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Formatter;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.TimeZone;
/**
* A calendar-like view displaying a specified month and the appropriate selectable day numbers
* within the specified month.
*/
public class SimpleMonthView extends View {
/**
* This sets the height of this week in pixels
*/
public static final String VIEW_PARAMS_HEIGHT = "height";
/**
* These params can be passed into the view to control how it appears.
* {@link #VIEW_PARAMS_WEEK} is the only required field, though the default
* values are unlikely to fit most layouts correctly.
*/
/**
* This specifies the position (or weeks since the epoch) of this week,
* calculated using {@link org.holoeverywhere.widget.datetimepicker.DateTimePickerUtils#getWeeksSinceEpochFromJulianDay}
*/
public static final String VIEW_PARAMS_MONTH = "month";
/**
* This specifies the position (or weeks since the epoch) of this week,
* calculated using {@link org.holoeverywhere.widget.datetimepicker.DateTimePickerUtils#getWeeksSinceEpochFromJulianDay}
*/
public static final String VIEW_PARAMS_YEAR = "year";
/**
* This sets one of the days in this view as selected {@link Time#SUNDAY}
* through {@link Time#SATURDAY}.
*/
public static final String VIEW_PARAMS_SELECTED_DAY = "selected_day";
/**
* Which day the week should start on. {@link Time#SUNDAY} through
* {@link Time#SATURDAY}.
*/
public static final String VIEW_PARAMS_WEEK_START = "week_start";
protected static final int DEFAULT_SELECTED_DAY = -1;
protected static final int DEFAULT_WEEK_START = Calendar.SUNDAY;
protected static final int DEFAULT_NUM_DAYS = 7;
protected static final int DEFAULT_NUM_ROWS = 6;
protected static final int MAX_NUM_ROWS = 6;
private static final int SELECTED_CIRCLE_ALPHA = 60;
protected static int DEFAULT_HEIGHT = 32;
protected static int MIN_HEIGHT = 10;
protected static int DAY_SEPARATOR_WIDTH = 1;
protected static int MINI_DAY_NUMBER_TEXT_SIZE;
protected static int MONTH_LABEL_TEXT_SIZE;
protected static int MONTH_DAY_LABEL_TEXT_SIZE;
protected static int MONTH_HEADER_SIZE;
protected static int DAY_SELECTED_CIRCLE_SIZE;
private final Formatter mFormatter;
private final StringBuilder mStringBuilder;
private final Calendar mCalendar;
private final Calendar mDayLabelCalendar;
private final MonthViewNodeProvider mNodeProvider;
// affects the padding on the sides of this view
protected int mPadding = 0;
protected Paint mMonthNumPaint;
protected Paint mMonthTitlePaint;
protected Paint mSelectedCirclePaint;
protected Paint mMonthDayLabelPaint;
protected int mMonth;
protected int mYear;
// Quick reference to the width of this view, matches parent
protected int mWidth;
// The height this view should draw at in pixels, set by height param
protected int mRowHeight = DEFAULT_HEIGHT;
// If this view contains the today
protected boolean mHasToday = false;
// Which day is selected [0-6] or -1 if no day is selected
protected int mSelectedDay = -1;
// Which day is today [0-6] or -1 if no day is today
protected int mToday = DEFAULT_SELECTED_DAY;
// Which day of the week to start on [0-6]
protected int mWeekStart = DEFAULT_WEEK_START;
// How many days to display
protected int mNumDays = DEFAULT_NUM_DAYS;
// The number of days + a spot for week number if it is displayed
protected int mNumCells = mNumDays;
protected int mDayTextColor;
protected int mTodayNumberColor;
protected int mMonthTitleColor;
protected int mSelectedCircleColor;
private int mNumRows = DEFAULT_NUM_ROWS;
// Optional listener for handling day click actions
private OnDayClickListener mOnDayClickListener;
// Whether to prevent setting the accessibility delegate
private boolean mLockAccessibilityDelegate;
private int mDayOfWeekStart = 0;
private SimpleDateFormat mMonthAndYearFormatter;
public SimpleMonthView(Context context) {
this(context, null);
}
public SimpleMonthView(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.dateTimePickerStyle);
}
public SimpleMonthView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
Resources res = context.getResources();
mDayLabelCalendar = Calendar.getInstance();
mCalendar = Calendar.getInstance();
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.DateTimePicker, defStyle, R.style.Holo_DateTimePicker);
mDayTextColor = a.getColor(R.styleable.DateTimePicker_dateDayTextColor, 0);
mTodayNumberColor = a.getColor(R.styleable.DateTimePicker_dateTodayColor, 0);
mMonthTitleColor = a.getColor(R.styleable.DateTimePicker_dateMonthTitleColor, 0);
mSelectedCircleColor = a.getColor(R.styleable.DateTimePicker_dateCircleColor, 0);
a.recycle();
mStringBuilder = new StringBuilder(50);
mFormatter = new Formatter(mStringBuilder, Locale.getDefault());
MINI_DAY_NUMBER_TEXT_SIZE = res.getDimensionPixelSize(R.dimen.date_day_number_size);
MONTH_LABEL_TEXT_SIZE = res.getDimensionPixelSize(R.dimen.date_month_label_size);
MONTH_DAY_LABEL_TEXT_SIZE = res.getDimensionPixelSize(R.dimen.date_month_day_label_text_size);
MONTH_HEADER_SIZE = res.getDimensionPixelOffset(R.dimen.date_month_list_item_header_height);
DAY_SELECTED_CIRCLE_SIZE = res
.getDimensionPixelSize(R.dimen.date_day_number_select_circle_radius);
mRowHeight = (res.getDimensionPixelOffset(R.dimen.date_time_picker_size)
- MONTH_HEADER_SIZE) / MAX_NUM_ROWS;
// Set up accessibility components.
mNodeProvider = new MonthViewNodeProvider(context, this);
ViewCompat.setAccessibilityDelegate(this, mNodeProvider.getAccessibilityDelegate());
ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
mLockAccessibilityDelegate = true;
// Sets up any standard paints that will be used
initView();
}
@Override
public void setAccessibilityDelegate(AccessibilityDelegate delegate) {
// Workaround for a JB MR1 issue where accessibility delegates on
// top-level ListView items are overwritten.
if (!mLockAccessibilityDelegate) {
super.setAccessibilityDelegate(delegate);
}
}
public void setOnDayClickListener(OnDayClickListener listener) {
mOnDayClickListener = listener;
}
@Override
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
public boolean onHoverEvent(MotionEvent event) {
// First right-of-refusal goes the touch exploration helper.
if (mNodeProvider.getOnHoverListener().onHover(this, event)) {
return true;
}
return super.onHoverEvent(event);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
final CalendarDay day = getDayFromLocation(event.getX(), event.getY());
if (day != null) {
onDayClick(day);
}
break;
}
return true;
}
/**
* Sets up the text and style properties for painting. Override this if you
* want to use a different paint.
*/
protected void initView() {
mMonthTitlePaint = new Paint();
mMonthTitlePaint.setFakeBoldText(true);
mMonthTitlePaint.setAntiAlias(true);
mMonthTitlePaint.setTextSize(MONTH_LABEL_TEXT_SIZE);
mMonthTitlePaint.setTypeface(FontLoader.ROBOTO_BOLD.getTypeface(getContext()));
mMonthTitlePaint.setColor(mMonthTitleColor);
mMonthTitlePaint.setTextAlign(Align.CENTER);
mMonthTitlePaint.setStyle(Style.FILL);
mSelectedCirclePaint = new Paint();
mSelectedCirclePaint.setFakeBoldText(true);
mSelectedCirclePaint.setAntiAlias(true);
mSelectedCirclePaint.setColor(mSelectedCircleColor);
mSelectedCirclePaint.setTextAlign(Align.CENTER);
mSelectedCirclePaint.setStyle(Style.FILL);
mSelectedCirclePaint.setAlpha(SELECTED_CIRCLE_ALPHA);
mMonthDayLabelPaint = new Paint();
mMonthDayLabelPaint.setAntiAlias(true);
mMonthDayLabelPaint.setTextSize(MONTH_DAY_LABEL_TEXT_SIZE);
mMonthDayLabelPaint.setColor(mDayTextColor);
mMonthDayLabelPaint.setTypeface(FontLoader.ROBOTO_REGULAR.getTypeface(getContext()));
mMonthDayLabelPaint.setStyle(Style.FILL);
mMonthDayLabelPaint.setTextAlign(Align.CENTER);
mMonthDayLabelPaint.setFakeBoldText(true);
mMonthNumPaint = new Paint();
mMonthNumPaint.setAntiAlias(true);
mMonthNumPaint.setTextSize(MINI_DAY_NUMBER_TEXT_SIZE);
mMonthNumPaint.setStyle(Style.FILL);
mMonthNumPaint.setTextAlign(Align.CENTER);
mMonthNumPaint.setFakeBoldText(false);
}
@Override
protected void onDraw(Canvas canvas) {
drawMonthTitle(canvas);
drawMonthDayLabels(canvas);
drawMonthNums(canvas);
}
/**
* Sets all the parameters for displaying this week. The only required
* parameter is the week number. Other parameters have a default value and
* will only update if a new value is included, except for focus month,
* which will always default to no focus month if no value is passed in. See
* {@link #VIEW_PARAMS_HEIGHT} for more info on parameters.
*
* @param params A map of the new parameters, see
* {@link #VIEW_PARAMS_HEIGHT}
*/
public void setMonthParams(HashMap<String, Integer> params) {
if (!params.containsKey(VIEW_PARAMS_MONTH) && !params.containsKey(VIEW_PARAMS_YEAR)) {
throw new InvalidParameterException("You must specify the month and year for this view");
}
setTag(params);
// We keep the current value for any params not present
if (params.containsKey(VIEW_PARAMS_HEIGHT)) {
mRowHeight = params.get(VIEW_PARAMS_HEIGHT);
if (mRowHeight < MIN_HEIGHT) {
mRowHeight = MIN_HEIGHT;
}
}
if (params.containsKey(VIEW_PARAMS_SELECTED_DAY)) {
mSelectedDay = params.get(VIEW_PARAMS_SELECTED_DAY);
}
// Allocate space for caching the day numbers and focus values
mMonth = params.get(VIEW_PARAMS_MONTH);
mYear = params.get(VIEW_PARAMS_YEAR);
// Figure out what day today is
final Time today = new Time(Time.getCurrentTimezone());
today.setToNow();
mHasToday = false;
mToday = -1;
mCalendar.set(Calendar.MONTH, mMonth);
mCalendar.set(Calendar.YEAR, mYear);
mCalendar.set(Calendar.DAY_OF_MONTH, 1);
mDayOfWeekStart = mCalendar.get(Calendar.DAY_OF_WEEK);
if (params.containsKey(VIEW_PARAMS_WEEK_START)) {
mWeekStart = params.get(VIEW_PARAMS_WEEK_START);
} else {
mWeekStart = mCalendar.getFirstDayOfWeek();
}
mNumCells = DateTimePickerUtils.getDaysInMonth(mMonth, mYear);
for (int i = 0; i < mNumCells; i++) {
final int day = i + 1;
if (sameDay(day, today)) {
mHasToday = true;
mToday = day;
}
}
mNumRows = calculateNumRows();
// Invalidate cached accessibility information.
mNodeProvider.invalidateParent();
}
public void reuse() {
mNumRows = DEFAULT_NUM_ROWS;
requestLayout();
}
private int calculateNumRows() {
int offset = findDayOffset();
int dividend = (offset + mNumCells) / mNumDays;
int remainder = (offset + mNumCells) % mNumDays;
return (dividend + (remainder > 0 ? 1 : 0));
}
private boolean sameDay(int day, Time today) {
return mYear == today.year &&
mMonth == today.month &&
day == today.monthDay;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), mRowHeight * mNumRows
+ MONTH_HEADER_SIZE);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mWidth = w;
// Invalidate cached accessibility information.
mNodeProvider.invalidateParent();
}
private String getMonthAndYearString() {
int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR
| DateUtils.FORMAT_NO_MONTH_DAY;
mStringBuilder.setLength(0);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
long millis = mCalendar.getTimeInMillis();
return DateUtils.formatDateRange(getContext(), mFormatter, millis, millis, flags,
Time.getCurrentTimezone()).toString();
} else {
if (mMonthAndYearFormatter == null) {
mMonthAndYearFormatter = new SimpleDateFormat("MMMM yyyy", Locale.getDefault());
mMonthAndYearFormatter.setTimeZone(TimeZone.getDefault());
}
return mMonthAndYearFormatter.format(mCalendar.getTime());
}
}
private void drawMonthTitle(Canvas canvas) {
int x = (mWidth + 2 * mPadding) / 2;
int y = (MONTH_HEADER_SIZE - MONTH_DAY_LABEL_TEXT_SIZE) / 2 + (MONTH_LABEL_TEXT_SIZE / 3);
canvas.drawText(getMonthAndYearString(), x, y, mMonthTitlePaint);
}
private void drawMonthDayLabels(Canvas canvas) {
int y = MONTH_HEADER_SIZE - (MONTH_DAY_LABEL_TEXT_SIZE / 2);
int dayWidthHalf = (mWidth - mPadding * 2) / (mNumDays * 2);
for (int i = 0; i < mNumDays; i++) {
int calendarDay = (i + mWeekStart) % mNumDays;
int x = (2 * i + 1) * dayWidthHalf + mPadding;
mDayLabelCalendar.set(Calendar.DAY_OF_WEEK, calendarDay);
canvas.drawText(DatePickerDialog.getDisplayName(mDayLabelCalendar, Calendar.DAY_OF_WEEK, Calendar.SHORT,
Locale.getDefault()).toUpperCase(Locale.getDefault()), x, y,
mMonthDayLabelPaint);
}
}
/**
* Draws the week and month day numbers for this week. Override this method
* if you need different placement.
*
* @param canvas The canvas to draw on
*/
protected void drawMonthNums(Canvas canvas) {
int y = (((mRowHeight + MINI_DAY_NUMBER_TEXT_SIZE) / 2) - DAY_SEPARATOR_WIDTH)
+ MONTH_HEADER_SIZE;
int dayWidthHalf = (mWidth - mPadding * 2) / (mNumDays * 2);
int j = findDayOffset();
for (int dayNumber = 1; dayNumber <= mNumCells; dayNumber++) {
int x = (2 * j + 1) * dayWidthHalf + mPadding;
if (mSelectedDay == dayNumber) {
canvas.drawCircle(x, y - (MINI_DAY_NUMBER_TEXT_SIZE / 3), DAY_SELECTED_CIRCLE_SIZE,
mSelectedCirclePaint);
}
mMonthNumPaint.setColor(mHasToday && mToday == dayNumber ? mTodayNumberColor : mDayTextColor);
canvas.drawText(String.format("%d", dayNumber), x, y, mMonthNumPaint);
j++;
if (j == mNumDays) {
j = 0;
y += mRowHeight;
}
}
}
private int findDayOffset() {
return (mDayOfWeekStart < mWeekStart ? (mDayOfWeekStart + mNumDays) : mDayOfWeekStart)
- mWeekStart;
}
/**
* Calculates the day that the given x position is in, accounting for week
* number. Returns a Time referencing that day or null if
*
* @param x The x position of the touch event
* @return A time object for the tapped day or null if the position wasn't
* in a day
*/
public CalendarDay getDayFromLocation(float x, float y) {
int dayStart = mPadding;
if (x < dayStart || x > mWidth - mPadding) {
return null;
}
// Selection is (x - start) / (pixels/day) == (x -s) * day / pixels
int row = (int) (y - MONTH_HEADER_SIZE) / mRowHeight;
int column = (int) ((x - dayStart) * mNumDays / (mWidth - dayStart - mPadding));
int day = column - findDayOffset() + 1;
day += row * mNumDays;
if (day < 1 || day > mNumCells) {
return null;
}
return new CalendarDay(mYear, mMonth, day);
}
/**
* Called when the user clicks on a day. Handles callbacks to the
* {@link OnDayClickListener} if one is set.
*
* @param day A time object representing the day that was clicked
*/
private void onDayClick(CalendarDay day) {
if (mOnDayClickListener != null) {
mOnDayClickListener.onDayClick(this, day);
}
// This is a no-op if accessibility is turned off.
mNodeProvider.sendEventForItem(day, AccessibilityEvent.TYPE_VIEW_CLICKED);
}
/**
* @return The date that has accessibility focus, or {@code null} if no date
* has focus
*/
public CalendarDay getAccessibilityFocus() {
return mNodeProvider.getFocusedItem();
}
/**
* Clears accessibility focus within the view. No-op if the view does not
* contain accessibility focus.
*/
public void clearAccessibilityFocus() {
mNodeProvider.clearFocusedItem();
}
/**
* Attempts to restore accessibility focus to the specified date.
*
* @param day The date which should receive focus
* @return {@code false} if the date is not valid for this month view, or
* {@code true} if the date received focus
*/
public boolean restoreAccessibilityFocus(CalendarDay day) {
if ((day.year != mYear) || (day.month != mMonth) || (day.day > mNumCells)) {
return false;
}
mNodeProvider.setFocusedItem(day);
return true;
}
/**
* Handles callbacks when the user clicks on a time object.
*/
public interface OnDayClickListener {
public void onDayClick(SimpleMonthView view, CalendarDay day);
}
/**
* Provides a virtual view hierarchy for interfacing with an accessibility
* service.
*/
private class MonthViewNodeProvider extends TouchExplorationHelper<CalendarDay> {
private final SparseArray<CalendarDay> mCachedItems = new SparseArray<CalendarDay>();
private final Rect mTempRect = new Rect();
Calendar recycle;
public MonthViewNodeProvider(Context context, View parent) {
super(context, parent);
}
@Override
public void invalidateItem(CalendarDay item) {
super.invalidateItem(item);
mCachedItems.delete(getIdForItem(item));
}
@Override
public void invalidateParent() {
super.invalidateParent();
mCachedItems.clear();
}
@Override
protected boolean performActionForItem(CalendarDay item, int action, Bundle arguments) {
switch (action) {
case AccessibilityNodeInfo.ACTION_CLICK:
onDayClick(item);
return true;
}
return false;
}
@Override
protected void populateEventForItem(CalendarDay item, AccessibilityEvent event) {
event.setContentDescription(getItemDescription(item));
}
@Override
protected void populateNodeForItem(CalendarDay item, AccessibilityNodeInfoCompat node) {
getItemBounds(item, mTempRect);
node.setContentDescription(getItemDescription(item));
node.setBoundsInParent(mTempRect);
node.addAction(AccessibilityNodeInfo.ACTION_CLICK);
if (item.day == mSelectedDay) {
node.setSelected(true);
}
}
@Override
protected void getVisibleItems(List<CalendarDay> items) {
// TODO: Optimize, only return items visible within parent bounds.
for (int day = 1; day <= mNumCells; day++) {
items.add(getItemForId(day));
}
}
@Override
protected CalendarDay getItemAt(float x, float y) {
return getDayFromLocation(x, y);
}
@Override
protected int getIdForItem(CalendarDay item) {
return item.day;
}
@Override
protected CalendarDay getItemForId(int id) {
if ((id < 1) || (id > mNumCells)) {
return null;
}
final CalendarDay item;
if (mCachedItems.indexOfKey(id) >= 0) {
item = mCachedItems.get(id);
} else {
item = new CalendarDay(mYear, mMonth, id);
mCachedItems.put(id, item);
}
return item;
}
/**
* Calculates the bounding rectangle of a given time object.
*
* @param item The time object to calculate bounds for
* @param rect The rectangle in which to store the bounds
*/
private void getItemBounds(CalendarDay item, Rect rect) {
final int offsetX = mPadding;
final int offsetY = MONTH_HEADER_SIZE;
final int cellHeight = mRowHeight;
final int cellWidth = ((mWidth - (2 * mPadding)) / mNumDays);
final int index = ((item.day - 1) + findDayOffset());
final int row = (index / mNumDays);
final int column = (index % mNumDays);
final int x = (offsetX + (column * cellWidth));
final int y = (offsetY + (row * cellHeight));
rect.set(x, y, (x + cellWidth), (y + cellHeight));
}
/**
* Generates a description for a given time object. Since this
* description will be spoken, the components are ordered by descending
* specificity as DAY MONTH YEAR.
*
* @param item The time object to generate a description for
* @return A description of the time object
*/
private CharSequence getItemDescription(CalendarDay item) {
if (recycle == null) {
recycle = Calendar.getInstance();
}
recycle.set(item.year, item.month, item.day);
CharSequence date = DateFormat.format("dd MMMM yyyy", recycle.getTimeInMillis());
if (item.day == mSelectedDay) {
return getContext().getString(R.string.item_is_selected, date);
}
return date;
}
}
}