core/java/android/widget/DayPickerPagerAdapter.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2015 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 android.widget;

 import android.annotation.IdRes;
 import android.annotation.LayoutRes;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
 import android.icu.util.Calendar;
 import android.util.SparseArray;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.SimpleMonthView.OnDayClickListener;

 import com.android.internal.widget.PagerAdapter;

 /**
  * An adapter for a list of {@link android.widget.SimpleMonthView} items.
  */
 class DayPickerPagerAdapter extends PagerAdapter {
     private static final int MONTHS_IN_YEAR = 12;

     private final Calendar mMinDate = Calendar.getInstance();
     private final Calendar mMaxDate = Calendar.getInstance();

     private final SparseArray<ViewHolder> mItems = new SparseArray<>();

     private final LayoutInflater mInflater;
     private final int mLayoutResId;
     private final int mCalendarViewId;

     private Calendar mSelectedDay = null;

     private int mMonthTextAppearance;
     private int mDayOfWeekTextAppearance;
     private int mDayTextAppearance;

     private ColorStateList mCalendarTextColor;
     private ColorStateList mDaySelectorColor;
     private ColorStateList mDayHighlightColor;

     private OnDaySelectedListener mOnDaySelectedListener;

     private int mCount;
     private int mFirstDayOfWeek;

     public DayPickerPagerAdapter(@NonNull Context context, @LayoutRes int layoutResId,
             @IdRes int calendarViewId) {
         mInflater = LayoutInflater.from(context);
         mLayoutResId = layoutResId;
         mCalendarViewId = calendarViewId;

         final TypedArray ta = context.obtainStyledAttributes(new int[] {
                 com.android.internal.R.attr.colorControlHighlight});
         mDayHighlightColor = ta.getColorStateList(0);
         ta.recycle();
     }

     public void setRange(@NonNull Calendar min, @NonNull Calendar max) {
         mMinDate.setTimeInMillis(min.getTimeInMillis());
         mMaxDate.setTimeInMillis(max.getTimeInMillis());

         final int diffYear = mMaxDate.get(Calendar.YEAR) - mMinDate.get(Calendar.YEAR);
         final int diffMonth = mMaxDate.get(Calendar.MONTH) - mMinDate.get(Calendar.MONTH);
         mCount = diffMonth + MONTHS_IN_YEAR * diffYear + 1;

         // Positions are now invalid, clear everything and start over.
         notifyDataSetChanged();
     }

     /**
      * Sets the first day of the week.
      *
      * @param weekStart which day the week should start on, valid values are
      *                  {@link Calendar#SUNDAY} through {@link Calendar#SATURDAY}
      */
     public void setFirstDayOfWeek(int weekStart) {
         mFirstDayOfWeek = weekStart;

         // Update displayed views.
         final int count = mItems.size();
         for (int i = 0; i < count; i++) {
             final SimpleMonthView monthView = mItems.valueAt(i).calendar;
             monthView.setFirstDayOfWeek(weekStart);
         }
     }

     public int getFirstDayOfWeek() {
         return mFirstDayOfWeek;
     }

     public boolean getBoundsForDate(Calendar day, Rect outBounds) {
         final int position = getPositionForDay(day);
         final ViewHolder monthView = mItems.get(position, null);
         if (monthView == null) {
             return false;
         } else {
             final int dayOfMonth = day.get(Calendar.DAY_OF_MONTH);
             return monthView.calendar.getBoundsForDay(dayOfMonth, outBounds);
         }
     }

     /**
      * Sets the selected day.
      *
      * @param day the selected day
      */
     public void setSelectedDay(@Nullable Calendar day) {
         final int oldPosition = getPositionForDay(mSelectedDay);
         final int newPosition = getPositionForDay(day);

         // Clear the old position if necessary.
         if (oldPosition != newPosition && oldPosition >= 0) {
             final ViewHolder oldMonthView = mItems.get(oldPosition, null);
             if (oldMonthView != null) {
                 oldMonthView.calendar.setSelectedDay(-1);
             }
         }

         // Set the new position.
         if (newPosition >= 0) {
             final ViewHolder newMonthView = mItems.get(newPosition, null);
             if (newMonthView != null) {
                 final int dayOfMonth = day.get(Calendar.DAY_OF_MONTH);
                 newMonthView.calendar.setSelectedDay(dayOfMonth);
             }
         }

         mSelectedDay = day;
     }

     /**
      * Sets the listener to call when the user selects a day.
      *
      * @param listener The listener to call.
      */
     public void setOnDaySelectedListener(OnDaySelectedListener listener) {
         mOnDaySelectedListener = listener;
     }

     void setCalendarTextColor(ColorStateList calendarTextColor) {
         mCalendarTextColor = calendarTextColor;
         notifyDataSetChanged();
     }

     void setDaySelectorColor(ColorStateList selectorColor) {
         mDaySelectorColor = selectorColor;
         notifyDataSetChanged();
     }

     void setMonthTextAppearance(int resId) {
         mMonthTextAppearance = resId;
         notifyDataSetChanged();
     }

     void setDayOfWeekTextAppearance(int resId) {
         mDayOfWeekTextAppearance = resId;
         notifyDataSetChanged();
     }

     int getDayOfWeekTextAppearance() {
         return mDayOfWeekTextAppearance;
     }

     void setDayTextAppearance(int resId) {
         mDayTextAppearance = resId;
         notifyDataSetChanged();
     }

     int getDayTextAppearance() {
         return mDayTextAppearance;
     }

     @Override
     public int getCount() {
         return mCount;
     }

     @Override
     public boolean isViewFromObject(View view, Object object) {
         final ViewHolder holder = (ViewHolder) object;
         return view == holder.container;
     }

     private int getMonthForPosition(int position) {
         return (position + mMinDate.get(Calendar.MONTH)) % MONTHS_IN_YEAR;
     }

     private int getYearForPosition(int position) {
         final int yearOffset = (position + mMinDate.get(Calendar.MONTH)) / MONTHS_IN_YEAR;
         return yearOffset + mMinDate.get(Calendar.YEAR);
     }

     private int getPositionForDay(@Nullable Calendar day) {
         if (day == null) {
             return -1;
         }

         final int yearOffset = day.get(Calendar.YEAR) - mMinDate.get(Calendar.YEAR);
         final int monthOffset = day.get(Calendar.MONTH) - mMinDate.get(Calendar.MONTH);
         final int position = yearOffset * MONTHS_IN_YEAR + monthOffset;
         return position;
     }

     @Override
     public Object instantiateItem(ViewGroup container, int position) {
         final View itemView = mInflater.inflate(mLayoutResId, container, false);

         final SimpleMonthView v = itemView.findViewById(mCalendarViewId);
         v.setOnDayClickListener(mOnDayClickListener);
         v.setMonthTextAppearance(mMonthTextAppearance);
         v.setDayOfWeekTextAppearance(mDayOfWeekTextAppearance);
         v.setDayTextAppearance(mDayTextAppearance);

         if (mDaySelectorColor != null) {
             v.setDaySelectorColor(mDaySelectorColor);
         }

         if (mDayHighlightColor != null) {
             v.setDayHighlightColor(mDayHighlightColor);
         }

         if (mCalendarTextColor != null) {
             v.setMonthTextColor(mCalendarTextColor);
             v.setDayOfWeekTextColor(mCalendarTextColor);
             v.setDayTextColor(mCalendarTextColor);
         }

         final int month = getMonthForPosition(position);
         final int year = getYearForPosition(position);

         final int selectedDay;
         if (mSelectedDay != null && mSelectedDay.get(Calendar.MONTH) == month) {
             selectedDay = mSelectedDay.get(Calendar.DAY_OF_MONTH);
         } else {
             selectedDay = -1;
         }

         final int enabledDayRangeStart;
         if (mMinDate.get(Calendar.MONTH) == month && mMinDate.get(Calendar.YEAR) == year) {
             enabledDayRangeStart = mMinDate.get(Calendar.DAY_OF_MONTH);
         } else {
             enabledDayRangeStart = 1;
         }

         final int enabledDayRangeEnd;
         if (mMaxDate.get(Calendar.MONTH) == month && mMaxDate.get(Calendar.YEAR) == year) {
             enabledDayRangeEnd = mMaxDate.get(Calendar.DAY_OF_MONTH);
         } else {
             enabledDayRangeEnd = 31;
         }

         v.setMonthParams(selectedDay, month, year, mFirstDayOfWeek,
                 enabledDayRangeStart, enabledDayRangeEnd);

         final ViewHolder holder = new ViewHolder(position, itemView, v);
         mItems.put(position, holder);

         container.addView(itemView);

         return holder;
     }

     @Override
     public void destroyItem(ViewGroup container, int position, Object object) {
         final ViewHolder holder = (ViewHolder) object;
         container.removeView(holder.container);

         mItems.remove(position);
     }

     @Override
     public int getItemPosition(Object object) {
         final ViewHolder holder = (ViewHolder) object;
         return holder.position;
     }

     @Override
     public CharSequence getPageTitle(int position) {
         final SimpleMonthView v = mItems.get(position).calendar;
         if (v != null) {
             return v.getMonthYearLabel();
         }
         return null;
     }

     SimpleMonthView getView(Object object) {
         if (object == null) {
             return null;
         }
         final ViewHolder holder = (ViewHolder) object;
         return holder.calendar;
     }

     private final OnDayClickListener mOnDayClickListener = new OnDayClickListener() {
         @Override
         public void onDayClick(SimpleMonthView view, Calendar day) {
             if (day != null) {
                 setSelectedDay(day);

                 if (mOnDaySelectedListener != null) {
                     mOnDaySelectedListener.onDaySelected(DayPickerPagerAdapter.this, day);
                 }
             }
         }
     };

     private static class ViewHolder {
         public final int position;
         public final View container;
         public final SimpleMonthView calendar;

         public ViewHolder(int position, View container, SimpleMonthView calendar) {
             this.position = position;
             this.container = container;
             this.calendar = calendar;
         }
     }

     public interface OnDaySelectedListener {
         public void onDaySelected(DayPickerPagerAdapter view, Calendar day);
     }
 }
	/*
	* Copyright (C) 2015 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 android.widget;

	import android.annotation.IdRes;
	import android.annotation.LayoutRes;
	import android.annotation.NonNull;
	import android.annotation.Nullable;
	import android.content.Context;
	import android.content.res.ColorStateList;
	import android.content.res.TypedArray;
	import android.graphics.Rect;
	import android.icu.util.Calendar;
	import android.util.SparseArray;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.SimpleMonthView.OnDayClickListener;

	import com.android.internal.widget.PagerAdapter;

	/**
	* An adapter for a list of {@link android.widget.SimpleMonthView} items.
	*/
	class DayPickerPagerAdapter extends PagerAdapter {
	private static final int MONTHS_IN_YEAR = 12;

	private final Calendar mMinDate = Calendar.getInstance();
	private final Calendar mMaxDate = Calendar.getInstance();

	private final SparseArray<ViewHolder> mItems = new SparseArray<>();

	private final LayoutInflater mInflater;
	private final int mLayoutResId;
	private final int mCalendarViewId;

	private Calendar mSelectedDay = null;

	private int mMonthTextAppearance;
	private int mDayOfWeekTextAppearance;
	private int mDayTextAppearance;

	private ColorStateList mCalendarTextColor;
	private ColorStateList mDaySelectorColor;
	private ColorStateList mDayHighlightColor;

	private OnDaySelectedListener mOnDaySelectedListener;

	private int mCount;
	private int mFirstDayOfWeek;

	public DayPickerPagerAdapter(@NonNull Context context, @LayoutRes int layoutResId,
	@IdRes int calendarViewId) {
	mInflater = LayoutInflater.from(context);
	mLayoutResId = layoutResId;
	mCalendarViewId = calendarViewId;

	final TypedArray ta = context.obtainStyledAttributes(new int[] {
	com.android.internal.R.attr.colorControlHighlight});
	mDayHighlightColor = ta.getColorStateList(0);
	ta.recycle();
	}

	public void setRange(@NonNull Calendar min, @NonNull Calendar max) {
	mMinDate.setTimeInMillis(min.getTimeInMillis());
	mMaxDate.setTimeInMillis(max.getTimeInMillis());

	final int diffYear = mMaxDate.get(Calendar.YEAR) - mMinDate.get(Calendar.YEAR);
	final int diffMonth = mMaxDate.get(Calendar.MONTH) - mMinDate.get(Calendar.MONTH);
	mCount = diffMonth + MONTHS_IN_YEAR * diffYear + 1;

	// Positions are now invalid, clear everything and start over.
	notifyDataSetChanged();
	}

	/**
	* Sets the first day of the week.
	*
	* @param weekStart which day the week should start on, valid values are
	* {@link Calendar#SUNDAY} through {@link Calendar#SATURDAY}
	*/
	public void setFirstDayOfWeek(int weekStart) {
	mFirstDayOfWeek = weekStart;

	// Update displayed views.
	final int count = mItems.size();
	for (int i = 0; i < count; i++) {
	final SimpleMonthView monthView = mItems.valueAt(i).calendar;
	monthView.setFirstDayOfWeek(weekStart);
	}
	}

	public int getFirstDayOfWeek() {
	return mFirstDayOfWeek;
	}

	public boolean getBoundsForDate(Calendar day, Rect outBounds) {
	final int position = getPositionForDay(day);
	final ViewHolder monthView = mItems.get(position, null);
	if (monthView == null) {
	return false;
	} else {
	final int dayOfMonth = day.get(Calendar.DAY_OF_MONTH);
	return monthView.calendar.getBoundsForDay(dayOfMonth, outBounds);
	}
	}

	/**
	* Sets the selected day.
	*
	* @param day the selected day
	*/
	public void setSelectedDay(@Nullable Calendar day) {
	final int oldPosition = getPositionForDay(mSelectedDay);
	final int newPosition = getPositionForDay(day);

	// Clear the old position if necessary.
	if (oldPosition != newPosition && oldPosition >= 0) {
	final ViewHolder oldMonthView = mItems.get(oldPosition, null);
	if (oldMonthView != null) {
	oldMonthView.calendar.setSelectedDay(-1);
	}
	}

	// Set the new position.
	if (newPosition >= 0) {
	final ViewHolder newMonthView = mItems.get(newPosition, null);
	if (newMonthView != null) {
	final int dayOfMonth = day.get(Calendar.DAY_OF_MONTH);
	newMonthView.calendar.setSelectedDay(dayOfMonth);
	}
	}

	mSelectedDay = day;
	}

	/**
	* Sets the listener to call when the user selects a day.
	*
	* @param listener The listener to call.
	*/
	public void setOnDaySelectedListener(OnDaySelectedListener listener) {
	mOnDaySelectedListener = listener;
	}

	void setCalendarTextColor(ColorStateList calendarTextColor) {
	mCalendarTextColor = calendarTextColor;
	notifyDataSetChanged();
	}

	void setDaySelectorColor(ColorStateList selectorColor) {
	mDaySelectorColor = selectorColor;
	notifyDataSetChanged();
	}

	void setMonthTextAppearance(int resId) {
	mMonthTextAppearance = resId;
	notifyDataSetChanged();
	}

	void setDayOfWeekTextAppearance(int resId) {
	mDayOfWeekTextAppearance = resId;
	notifyDataSetChanged();
	}

	int getDayOfWeekTextAppearance() {
	return mDayOfWeekTextAppearance;
	}

	void setDayTextAppearance(int resId) {
	mDayTextAppearance = resId;
	notifyDataSetChanged();
	}

	int getDayTextAppearance() {
	return mDayTextAppearance;
	}

	@Override
	public int getCount() {
	return mCount;
	}

	@Override
	public boolean isViewFromObject(View view, Object object) {
	final ViewHolder holder = (ViewHolder) object;
	return view == holder.container;
	}

	private int getMonthForPosition(int position) {
	return (position + mMinDate.get(Calendar.MONTH)) % MONTHS_IN_YEAR;
	}

	private int getYearForPosition(int position) {
	final int yearOffset = (position + mMinDate.get(Calendar.MONTH)) / MONTHS_IN_YEAR;
	return yearOffset + mMinDate.get(Calendar.YEAR);
	}

	private int getPositionForDay(@Nullable Calendar day) {
	if (day == null) {
	return -1;
	}

	final int yearOffset = day.get(Calendar.YEAR) - mMinDate.get(Calendar.YEAR);
	final int monthOffset = day.get(Calendar.MONTH) - mMinDate.get(Calendar.MONTH);
	final int position = yearOffset * MONTHS_IN_YEAR + monthOffset;
	return position;
	}

	@Override
	public Object instantiateItem(ViewGroup container, int position) {
	final View itemView = mInflater.inflate(mLayoutResId, container, false);

	final SimpleMonthView v = itemView.findViewById(mCalendarViewId);
	v.setOnDayClickListener(mOnDayClickListener);
	v.setMonthTextAppearance(mMonthTextAppearance);
	v.setDayOfWeekTextAppearance(mDayOfWeekTextAppearance);
	v.setDayTextAppearance(mDayTextAppearance);

	if (mDaySelectorColor != null) {
	v.setDaySelectorColor(mDaySelectorColor);
	}

	if (mDayHighlightColor != null) {
	v.setDayHighlightColor(mDayHighlightColor);
	}

	if (mCalendarTextColor != null) {
	v.setMonthTextColor(mCalendarTextColor);
	v.setDayOfWeekTextColor(mCalendarTextColor);
	v.setDayTextColor(mCalendarTextColor);
	}

	final int month = getMonthForPosition(position);
	final int year = getYearForPosition(position);

	final int selectedDay;
	if (mSelectedDay != null && mSelectedDay.get(Calendar.MONTH) == month) {
	selectedDay = mSelectedDay.get(Calendar.DAY_OF_MONTH);
	} else {
	selectedDay = -1;
	}

	final int enabledDayRangeStart;
	if (mMinDate.get(Calendar.MONTH) == month && mMinDate.get(Calendar.YEAR) == year) {
	enabledDayRangeStart = mMinDate.get(Calendar.DAY_OF_MONTH);
	} else {
	enabledDayRangeStart = 1;
	}

	final int enabledDayRangeEnd;
	if (mMaxDate.get(Calendar.MONTH) == month && mMaxDate.get(Calendar.YEAR) == year) {
	enabledDayRangeEnd = mMaxDate.get(Calendar.DAY_OF_MONTH);
	} else {
	enabledDayRangeEnd = 31;
	}

	v.setMonthParams(selectedDay, month, year, mFirstDayOfWeek,
	enabledDayRangeStart, enabledDayRangeEnd);

	final ViewHolder holder = new ViewHolder(position, itemView, v);
	mItems.put(position, holder);

	container.addView(itemView);

	return holder;
	}

	@Override
	public void destroyItem(ViewGroup container, int position, Object object) {
	final ViewHolder holder = (ViewHolder) object;
	container.removeView(holder.container);

	mItems.remove(position);
	}

	@Override
	public int getItemPosition(Object object) {
	final ViewHolder holder = (ViewHolder) object;
	return holder.position;
	}

	@Override
	public CharSequence getPageTitle(int position) {
	final SimpleMonthView v = mItems.get(position).calendar;
	if (v != null) {
	return v.getMonthYearLabel();
	}
	return null;
	}

	SimpleMonthView getView(Object object) {
	if (object == null) {
	return null;
	}
	final ViewHolder holder = (ViewHolder) object;
	return holder.calendar;
	}

	private final OnDayClickListener mOnDayClickListener = new OnDayClickListener() {
	@Override
	public void onDayClick(SimpleMonthView view, Calendar day) {
	if (day != null) {
	setSelectedDay(day);

	if (mOnDaySelectedListener != null) {
	mOnDaySelectedListener.onDaySelected(DayPickerPagerAdapter.this, day);
	}
	}
	}
	};

	private static class ViewHolder {
	public final int position;
	public final View container;
	public final SimpleMonthView calendar;

	public ViewHolder(int position, View container, SimpleMonthView calendar) {
	this.position = position;
	this.container = container;
	this.calendar = calendar;
	}
	}

	public interface OnDaySelectedListener {
	public void onDaySelected(DayPickerPagerAdapter view, Calendar day);
	}
	}