| /* |
| * 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 com.android.internal.R; |
| import com.android.internal.widget.ViewPager; |
| import com.android.internal.widget.ViewPager.OnPageChangeListener; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.content.res.ColorStateList; |
| import android.content.res.TypedArray; |
| import android.icu.util.Calendar; |
| import android.util.AttributeSet; |
| import android.util.MathUtils; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.accessibility.AccessibilityManager; |
| |
| import java.util.Locale; |
| |
| import libcore.icu.LocaleData; |
| |
| class DayPickerView extends ViewGroup { |
| private static final int DEFAULT_LAYOUT = R.layout.day_picker_content_material; |
| private static final int DEFAULT_START_YEAR = 1900; |
| private static final int DEFAULT_END_YEAR = 2100; |
| |
| private static final int[] ATTRS_TEXT_COLOR = new int[] { R.attr.textColor }; |
| |
| private final Calendar mSelectedDay = Calendar.getInstance(); |
| private final Calendar mMinDate = Calendar.getInstance(); |
| private final Calendar mMaxDate = Calendar.getInstance(); |
| |
| private final AccessibilityManager mAccessibilityManager; |
| |
| private final ViewPager mViewPager; |
| private final ImageButton mPrevButton; |
| private final ImageButton mNextButton; |
| |
| private final DayPickerPagerAdapter mAdapter; |
| |
| /** Temporary calendar used for date calculations. */ |
| private Calendar mTempCalendar; |
| |
| private OnDaySelectedListener mOnDaySelectedListener; |
| |
| public DayPickerView(Context context) { |
| this(context, null); |
| } |
| |
| public DayPickerView(Context context, @Nullable AttributeSet attrs) { |
| this(context, attrs, R.attr.calendarViewStyle); |
| } |
| |
| public DayPickerView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public DayPickerView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, |
| int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| |
| mAccessibilityManager = (AccessibilityManager) context.getSystemService( |
| Context.ACCESSIBILITY_SERVICE); |
| |
| final TypedArray a = context.obtainStyledAttributes(attrs, |
| R.styleable.CalendarView, defStyleAttr, defStyleRes); |
| |
| final int firstDayOfWeek = a.getInt(R.styleable.CalendarView_firstDayOfWeek, |
| LocaleData.get(Locale.getDefault()).firstDayOfWeek); |
| |
| final String minDate = a.getString(R.styleable.CalendarView_minDate); |
| final String maxDate = a.getString(R.styleable.CalendarView_maxDate); |
| |
| final int monthTextAppearanceResId = a.getResourceId( |
| R.styleable.CalendarView_monthTextAppearance, |
| R.style.TextAppearance_Material_Widget_Calendar_Month); |
| final int dayOfWeekTextAppearanceResId = a.getResourceId( |
| R.styleable.CalendarView_weekDayTextAppearance, |
| R.style.TextAppearance_Material_Widget_Calendar_DayOfWeek); |
| final int dayTextAppearanceResId = a.getResourceId( |
| R.styleable.CalendarView_dateTextAppearance, |
| R.style.TextAppearance_Material_Widget_Calendar_Day); |
| |
| final ColorStateList daySelectorColor = a.getColorStateList( |
| R.styleable.CalendarView_daySelectorColor); |
| |
| a.recycle(); |
| |
| // Set up adapter. |
| mAdapter = new DayPickerPagerAdapter(context, |
| R.layout.date_picker_month_item_material, R.id.month_view); |
| mAdapter.setMonthTextAppearance(monthTextAppearanceResId); |
| mAdapter.setDayOfWeekTextAppearance(dayOfWeekTextAppearanceResId); |
| mAdapter.setDayTextAppearance(dayTextAppearanceResId); |
| mAdapter.setDaySelectorColor(daySelectorColor); |
| |
| final LayoutInflater inflater = LayoutInflater.from(context); |
| final ViewGroup content = (ViewGroup) inflater.inflate(DEFAULT_LAYOUT, this, false); |
| |
| // Transfer all children from content to here. |
| while (content.getChildCount() > 0) { |
| final View child = content.getChildAt(0); |
| content.removeViewAt(0); |
| addView(child); |
| } |
| |
| mPrevButton = (ImageButton) findViewById(R.id.prev); |
| mPrevButton.setOnClickListener(mOnClickListener); |
| |
| mNextButton = (ImageButton) findViewById(R.id.next); |
| mNextButton.setOnClickListener(mOnClickListener); |
| |
| mViewPager = (ViewPager) findViewById(R.id.day_picker_view_pager); |
| mViewPager.setAdapter(mAdapter); |
| mViewPager.setOnPageChangeListener(mOnPageChangedListener); |
| |
| // Proxy the month text color into the previous and next buttons. |
| if (monthTextAppearanceResId != 0) { |
| final TypedArray ta = mContext.obtainStyledAttributes(null, |
| ATTRS_TEXT_COLOR, 0, monthTextAppearanceResId); |
| final ColorStateList monthColor = ta.getColorStateList(0); |
| if (monthColor != null) { |
| mPrevButton.setImageTintList(monthColor); |
| mNextButton.setImageTintList(monthColor); |
| } |
| ta.recycle(); |
| } |
| |
| // Set up min and max dates. |
| final Calendar tempDate = Calendar.getInstance(); |
| if (!CalendarView.parseDate(minDate, tempDate)) { |
| tempDate.set(DEFAULT_START_YEAR, Calendar.JANUARY, 1); |
| } |
| final long minDateMillis = tempDate.getTimeInMillis(); |
| |
| if (!CalendarView.parseDate(maxDate, tempDate)) { |
| tempDate.set(DEFAULT_END_YEAR, Calendar.DECEMBER, 31); |
| } |
| final long maxDateMillis = tempDate.getTimeInMillis(); |
| |
| if (maxDateMillis < minDateMillis) { |
| throw new IllegalArgumentException("maxDate must be >= minDate"); |
| } |
| |
| final long setDateMillis = MathUtils.constrain( |
| System.currentTimeMillis(), minDateMillis, maxDateMillis); |
| |
| setFirstDayOfWeek(firstDayOfWeek); |
| setMinDate(minDateMillis); |
| setMaxDate(maxDateMillis); |
| setDate(setDateMillis, false); |
| |
| // Proxy selection callbacks to our own listener. |
| mAdapter.setOnDaySelectedListener(new DayPickerPagerAdapter.OnDaySelectedListener() { |
| @Override |
| public void onDaySelected(DayPickerPagerAdapter adapter, Calendar day) { |
| if (mOnDaySelectedListener != null) { |
| mOnDaySelectedListener.onDaySelected(DayPickerView.this, day); |
| } |
| } |
| }); |
| } |
| |
| private void updateButtonVisibility(int position) { |
| final boolean hasPrev = position > 0; |
| final boolean hasNext = position < (mAdapter.getCount() - 1); |
| mPrevButton.setVisibility(hasPrev ? View.VISIBLE : View.INVISIBLE); |
| mNextButton.setVisibility(hasNext ? View.VISIBLE : View.INVISIBLE); |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| final ViewPager viewPager = mViewPager; |
| measureChild(viewPager, widthMeasureSpec, heightMeasureSpec); |
| |
| final int measuredWidthAndState = viewPager.getMeasuredWidthAndState(); |
| final int measuredHeightAndState = viewPager.getMeasuredHeightAndState(); |
| setMeasuredDimension(measuredWidthAndState, measuredHeightAndState); |
| |
| final int pagerWidth = viewPager.getMeasuredWidth(); |
| final int pagerHeight = viewPager.getMeasuredHeight(); |
| final int buttonWidthSpec = MeasureSpec.makeMeasureSpec(pagerWidth, MeasureSpec.AT_MOST); |
| final int buttonHeightSpec = MeasureSpec.makeMeasureSpec(pagerHeight, MeasureSpec.AT_MOST); |
| mPrevButton.measure(buttonWidthSpec, buttonHeightSpec); |
| mNextButton.measure(buttonWidthSpec, buttonHeightSpec); |
| } |
| |
| @Override |
| public void onRtlPropertiesChanged(@ResolvedLayoutDir int layoutDirection) { |
| super.onRtlPropertiesChanged(layoutDirection); |
| |
| requestLayout(); |
| } |
| |
| @Override |
| protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| final ImageButton leftButton; |
| final ImageButton rightButton; |
| if (isLayoutRtl()) { |
| leftButton = mNextButton; |
| rightButton = mPrevButton; |
| } else { |
| leftButton = mPrevButton; |
| rightButton = mNextButton; |
| } |
| |
| final int width = right - left; |
| final int height = bottom - top; |
| mViewPager.layout(0, 0, width, height); |
| |
| final SimpleMonthView monthView = (SimpleMonthView) mViewPager.getChildAt(0); |
| final int monthHeight = monthView.getMonthHeight(); |
| final int cellWidth = monthView.getCellWidth(); |
| |
| // Vertically center the previous/next buttons within the month |
| // header, horizontally center within the day cell. |
| final int leftDW = leftButton.getMeasuredWidth(); |
| final int leftDH = leftButton.getMeasuredHeight(); |
| final int leftIconTop = monthView.getPaddingTop() + (monthHeight - leftDH) / 2; |
| final int leftIconLeft = monthView.getPaddingLeft() + (cellWidth - leftDW) / 2; |
| leftButton.layout(leftIconLeft, leftIconTop, leftIconLeft + leftDW, leftIconTop + leftDH); |
| |
| final int rightDW = rightButton.getMeasuredWidth(); |
| final int rightDH = rightButton.getMeasuredHeight(); |
| final int rightIconTop = monthView.getPaddingTop() + (monthHeight - rightDH) / 2; |
| final int rightIconRight = width - monthView.getPaddingRight() - (cellWidth - rightDW) / 2; |
| rightButton.layout(rightIconRight - rightDW, rightIconTop, |
| rightIconRight, rightIconTop + rightDH); |
| } |
| |
| public void setDayOfWeekTextAppearance(int resId) { |
| mAdapter.setDayOfWeekTextAppearance(resId); |
| } |
| |
| public int getDayOfWeekTextAppearance() { |
| return mAdapter.getDayOfWeekTextAppearance(); |
| } |
| |
| public void setDayTextAppearance(int resId) { |
| mAdapter.setDayTextAppearance(resId); |
| } |
| |
| public int getDayTextAppearance() { |
| return mAdapter.getDayTextAppearance(); |
| } |
| |
| /** |
| * Sets the currently selected date to the specified timestamp. Jumps |
| * immediately to the new date. To animate to the new date, use |
| * {@link #setDate(long, boolean)}. |
| * |
| * @param timeInMillis the target day in milliseconds |
| */ |
| public void setDate(long timeInMillis) { |
| setDate(timeInMillis, false); |
| } |
| |
| /** |
| * Sets the currently selected date to the specified timestamp. Jumps |
| * immediately to the new date, optionally animating the transition. |
| * |
| * @param timeInMillis the target day in milliseconds |
| * @param animate whether to smooth scroll to the new position |
| */ |
| public void setDate(long timeInMillis, boolean animate) { |
| setDate(timeInMillis, animate, true); |
| } |
| |
| /** |
| * Moves to the month containing the specified day, optionally setting the |
| * day as selected. |
| * |
| * @param timeInMillis the target day in milliseconds |
| * @param animate whether to smooth scroll to the new position |
| * @param setSelected whether to set the specified day as selected |
| */ |
| private void setDate(long timeInMillis, boolean animate, boolean setSelected) { |
| if (setSelected) { |
| mSelectedDay.setTimeInMillis(timeInMillis); |
| } |
| |
| final int position = getPositionFromDay(timeInMillis); |
| if (position != mViewPager.getCurrentItem()) { |
| mViewPager.setCurrentItem(position, animate); |
| } |
| |
| mTempCalendar.setTimeInMillis(timeInMillis); |
| mAdapter.setSelectedDay(mTempCalendar); |
| } |
| |
| public long getDate() { |
| return mSelectedDay.getTimeInMillis(); |
| } |
| |
| public void setFirstDayOfWeek(int firstDayOfWeek) { |
| mAdapter.setFirstDayOfWeek(firstDayOfWeek); |
| } |
| |
| public int getFirstDayOfWeek() { |
| return mAdapter.getFirstDayOfWeek(); |
| } |
| |
| public void setMinDate(long timeInMillis) { |
| mMinDate.setTimeInMillis(timeInMillis); |
| onRangeChanged(); |
| } |
| |
| public long getMinDate() { |
| return mMinDate.getTimeInMillis(); |
| } |
| |
| public void setMaxDate(long timeInMillis) { |
| mMaxDate.setTimeInMillis(timeInMillis); |
| onRangeChanged(); |
| } |
| |
| public long getMaxDate() { |
| return mMaxDate.getTimeInMillis(); |
| } |
| |
| /** |
| * Handles changes to date range. |
| */ |
| public void onRangeChanged() { |
| mAdapter.setRange(mMinDate, mMaxDate); |
| |
| // Changing the min/max date changes the selection position since we |
| // don't really have stable IDs. Jumps immediately to the new position. |
| setDate(mSelectedDay.getTimeInMillis(), false, false); |
| |
| updateButtonVisibility(mViewPager.getCurrentItem()); |
| } |
| |
| /** |
| * Sets the listener to call when the user selects a day. |
| * |
| * @param listener The listener to call. |
| */ |
| public void setOnDaySelectedListener(OnDaySelectedListener listener) { |
| mOnDaySelectedListener = listener; |
| } |
| |
| private int getDiffMonths(Calendar start, Calendar end) { |
| final int diffYears = end.get(Calendar.YEAR) - start.get(Calendar.YEAR); |
| return end.get(Calendar.MONTH) - start.get(Calendar.MONTH) + 12 * diffYears; |
| } |
| |
| private int getPositionFromDay(long timeInMillis) { |
| final int diffMonthMax = getDiffMonths(mMinDate, mMaxDate); |
| final int diffMonth = getDiffMonths(mMinDate, getTempCalendarForTime(timeInMillis)); |
| return MathUtils.constrain(diffMonth, 0, diffMonthMax); |
| } |
| |
| private Calendar getTempCalendarForTime(long timeInMillis) { |
| if (mTempCalendar == null) { |
| mTempCalendar = Calendar.getInstance(); |
| } |
| mTempCalendar.setTimeInMillis(timeInMillis); |
| return mTempCalendar; |
| } |
| |
| /** |
| * Gets the position of the view that is most prominently displayed within the list view. |
| */ |
| public int getMostVisiblePosition() { |
| return mViewPager.getCurrentItem(); |
| } |
| |
| public void setPosition(int position) { |
| mViewPager.setCurrentItem(position, false); |
| } |
| |
| private final OnPageChangeListener mOnPageChangedListener = new OnPageChangeListener() { |
| @Override |
| public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { |
| final float alpha = Math.abs(0.5f - positionOffset) * 2.0f; |
| mPrevButton.setAlpha(alpha); |
| mNextButton.setAlpha(alpha); |
| } |
| |
| @Override |
| public void onPageScrollStateChanged(int state) {} |
| |
| @Override |
| public void onPageSelected(int position) { |
| updateButtonVisibility(position); |
| } |
| }; |
| |
| private final OnClickListener mOnClickListener = new OnClickListener() { |
| @Override |
| public void onClick(View v) { |
| final int direction; |
| if (v == mPrevButton) { |
| direction = -1; |
| } else if (v == mNextButton) { |
| direction = 1; |
| } else { |
| return; |
| } |
| |
| // Animation is expensive for accessibility services since it sends |
| // lots of scroll and content change events. |
| final boolean animate = !mAccessibilityManager.isEnabled(); |
| |
| // ViewPager clamps input values, so we don't need to worry |
| // about passing invalid indices. |
| final int nextItem = mViewPager.getCurrentItem() + direction; |
| mViewPager.setCurrentItem(nextItem, animate); |
| } |
| }; |
| |
| public interface OnDaySelectedListener { |
| void onDaySelected(DayPickerView view, Calendar day); |
| } |
| } |