454 lines
17 KiB
Java
454 lines
17 KiB
Java
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.widget;
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import android.annotation.Nullable;
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import android.content.Context;
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import android.content.res.ColorStateList;
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import android.content.res.TypedArray;
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import android.graphics.Rect;
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import android.icu.util.Calendar;
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import android.util.AttributeSet;
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import android.util.MathUtils;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.accessibility.AccessibilityManager;
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import com.android.internal.R;
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import com.android.internal.widget.ViewPager;
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import com.android.internal.widget.ViewPager.OnPageChangeListener;
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class DayPickerView extends ViewGroup {
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private static final int DEFAULT_LAYOUT = R.layout.day_picker_content_material;
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private static final int DEFAULT_START_YEAR = 1900;
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private static final int DEFAULT_END_YEAR = 2100;
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private static final int[] ATTRS_TEXT_COLOR = new int[] { R.attr.textColor };
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private final Calendar mSelectedDay = Calendar.getInstance();
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private final Calendar mMinDate = Calendar.getInstance();
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private final Calendar mMaxDate = Calendar.getInstance();
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private final AccessibilityManager mAccessibilityManager;
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private final ViewPager mViewPager;
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private final ImageButton mPrevButton;
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private final ImageButton mNextButton;
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private final DayPickerPagerAdapter mAdapter;
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/** Temporary calendar used for date calculations. */
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private Calendar mTempCalendar;
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private OnDaySelectedListener mOnDaySelectedListener;
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public DayPickerView(Context context) {
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this(context, null);
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}
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public DayPickerView(Context context, @Nullable AttributeSet attrs) {
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this(context, attrs, R.attr.calendarViewStyle);
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}
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public DayPickerView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
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this(context, attrs, defStyleAttr, 0);
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}
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public DayPickerView(Context context, @Nullable AttributeSet attrs, int defStyleAttr,
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int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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mAccessibilityManager = (AccessibilityManager) context.getSystemService(
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Context.ACCESSIBILITY_SERVICE);
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final TypedArray a = context.obtainStyledAttributes(attrs,
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R.styleable.CalendarView, defStyleAttr, defStyleRes);
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saveAttributeDataForStyleable(context, R.styleable.CalendarView,
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attrs, a, defStyleAttr, defStyleRes);
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final int firstDayOfWeek = a.getInt(R.styleable.CalendarView_firstDayOfWeek,
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Calendar.getInstance().getFirstDayOfWeek());
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final String minDate = a.getString(R.styleable.CalendarView_minDate);
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final String maxDate = a.getString(R.styleable.CalendarView_maxDate);
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final int monthTextAppearanceResId = a.getResourceId(
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R.styleable.CalendarView_monthTextAppearance,
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R.style.TextAppearance_Material_Widget_Calendar_Month);
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final int dayOfWeekTextAppearanceResId = a.getResourceId(
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R.styleable.CalendarView_weekDayTextAppearance,
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R.style.TextAppearance_Material_Widget_Calendar_DayOfWeek);
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final int dayTextAppearanceResId = a.getResourceId(
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R.styleable.CalendarView_dateTextAppearance,
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R.style.TextAppearance_Material_Widget_Calendar_Day);
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final ColorStateList daySelectorColor = a.getColorStateList(
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R.styleable.CalendarView_daySelectorColor);
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a.recycle();
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// Set up adapter.
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mAdapter = new DayPickerPagerAdapter(context,
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R.layout.date_picker_month_item_material, R.id.month_view);
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mAdapter.setMonthTextAppearance(monthTextAppearanceResId);
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mAdapter.setDayOfWeekTextAppearance(dayOfWeekTextAppearanceResId);
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mAdapter.setDayTextAppearance(dayTextAppearanceResId);
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mAdapter.setDaySelectorColor(daySelectorColor);
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final LayoutInflater inflater = LayoutInflater.from(context);
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final ViewGroup content = (ViewGroup) inflater.inflate(DEFAULT_LAYOUT, this, false);
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// Transfer all children from content to here.
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while (content.getChildCount() > 0) {
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final View child = content.getChildAt(0);
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content.removeViewAt(0);
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addView(child);
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}
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mPrevButton = findViewById(R.id.prev);
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mPrevButton.setOnClickListener(mOnClickListener);
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mNextButton = findViewById(R.id.next);
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mNextButton.setOnClickListener(mOnClickListener);
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mViewPager = findViewById(R.id.day_picker_view_pager);
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mViewPager.setAdapter(mAdapter);
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mViewPager.setOnPageChangeListener(mOnPageChangedListener);
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// Proxy the month text color into the previous and next buttons.
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if (monthTextAppearanceResId != 0) {
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final TypedArray ta = mContext.obtainStyledAttributes(null,
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ATTRS_TEXT_COLOR, 0, monthTextAppearanceResId);
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final ColorStateList monthColor = ta.getColorStateList(0);
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if (monthColor != null) {
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mPrevButton.setImageTintList(monthColor);
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mNextButton.setImageTintList(monthColor);
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}
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ta.recycle();
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}
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// Set up min and max dates.
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final Calendar tempDate = Calendar.getInstance();
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if (!CalendarView.parseDate(minDate, tempDate)) {
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tempDate.set(DEFAULT_START_YEAR, Calendar.JANUARY, 1);
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}
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final long minDateMillis = tempDate.getTimeInMillis();
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if (!CalendarView.parseDate(maxDate, tempDate)) {
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tempDate.set(DEFAULT_END_YEAR, Calendar.DECEMBER, 31);
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}
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final long maxDateMillis = tempDate.getTimeInMillis();
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if (maxDateMillis < minDateMillis) {
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throw new IllegalArgumentException("maxDate must be >= minDate");
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}
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final long setDateMillis = MathUtils.constrain(
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System.currentTimeMillis(), minDateMillis, maxDateMillis);
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setFirstDayOfWeek(firstDayOfWeek);
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setMinDate(minDateMillis);
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setMaxDate(maxDateMillis);
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setDate(setDateMillis, false);
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// Proxy selection callbacks to our own listener.
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mAdapter.setOnDaySelectedListener(new DayPickerPagerAdapter.OnDaySelectedListener() {
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@Override
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public void onDaySelected(DayPickerPagerAdapter adapter, Calendar day) {
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if (mOnDaySelectedListener != null) {
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mOnDaySelectedListener.onDaySelected(DayPickerView.this, day);
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}
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}
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});
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}
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private void updateButtonVisibility(int position) {
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final boolean hasPrev = position > 0;
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final boolean hasNext = position < (mAdapter.getCount() - 1);
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mPrevButton.setVisibility(hasPrev ? View.VISIBLE : View.INVISIBLE);
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mNextButton.setVisibility(hasNext ? View.VISIBLE : View.INVISIBLE);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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final ViewPager viewPager = mViewPager;
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measureChild(viewPager, widthMeasureSpec, heightMeasureSpec);
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final int measuredWidthAndState = viewPager.getMeasuredWidthAndState();
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final int measuredHeightAndState = viewPager.getMeasuredHeightAndState();
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setMeasuredDimension(measuredWidthAndState, measuredHeightAndState);
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final int pagerWidth = viewPager.getMeasuredWidth();
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final int pagerHeight = viewPager.getMeasuredHeight();
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final int buttonWidthSpec = MeasureSpec.makeMeasureSpec(pagerWidth, MeasureSpec.AT_MOST);
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final int buttonHeightSpec = MeasureSpec.makeMeasureSpec(pagerHeight, MeasureSpec.AT_MOST);
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mPrevButton.measure(buttonWidthSpec, buttonHeightSpec);
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mNextButton.measure(buttonWidthSpec, buttonHeightSpec);
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}
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@Override
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public void onRtlPropertiesChanged(@ResolvedLayoutDir int layoutDirection) {
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super.onRtlPropertiesChanged(layoutDirection);
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requestLayout();
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}
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@Override
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protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
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final ImageButton leftButton;
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final ImageButton rightButton;
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if (isLayoutRtl()) {
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leftButton = mNextButton;
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rightButton = mPrevButton;
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} else {
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leftButton = mPrevButton;
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rightButton = mNextButton;
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}
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final int width = right - left;
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final int height = bottom - top;
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mViewPager.layout(0, 0, width, height);
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final SimpleMonthView monthView = (SimpleMonthView) mViewPager.getChildAt(0);
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final int monthHeight = monthView.getMonthHeight();
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final int cellWidth = monthView.getCellWidth();
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// Vertically center the previous/next buttons within the month
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// header, horizontally center within the day cell.
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final int leftDW = leftButton.getMeasuredWidth();
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final int leftDH = leftButton.getMeasuredHeight();
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final int leftIconTop = monthView.getPaddingTop() + (monthHeight - leftDH) / 2;
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final int leftIconLeft = monthView.getPaddingLeft() + (cellWidth - leftDW) / 2;
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leftButton.layout(leftIconLeft, leftIconTop, leftIconLeft + leftDW, leftIconTop + leftDH);
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final int rightDW = rightButton.getMeasuredWidth();
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final int rightDH = rightButton.getMeasuredHeight();
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final int rightIconTop = monthView.getPaddingTop() + (monthHeight - rightDH) / 2;
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final int rightIconRight = width - monthView.getPaddingRight() - (cellWidth - rightDW) / 2;
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rightButton.layout(rightIconRight - rightDW, rightIconTop,
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rightIconRight, rightIconTop + rightDH);
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}
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public void setDayOfWeekTextAppearance(int resId) {
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mAdapter.setDayOfWeekTextAppearance(resId);
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}
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public int getDayOfWeekTextAppearance() {
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return mAdapter.getDayOfWeekTextAppearance();
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}
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public void setDayTextAppearance(int resId) {
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mAdapter.setDayTextAppearance(resId);
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}
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public int getDayTextAppearance() {
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return mAdapter.getDayTextAppearance();
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}
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/**
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* Sets the currently selected date to the specified timestamp. Jumps
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* immediately to the new date. To animate to the new date, use
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* {@link #setDate(long, boolean)}.
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*
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* @param timeInMillis the target day in milliseconds
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*/
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public void setDate(long timeInMillis) {
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setDate(timeInMillis, false);
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}
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/**
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* Sets the currently selected date to the specified timestamp. Jumps
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* immediately to the new date, optionally animating the transition.
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*
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* @param timeInMillis the target day in milliseconds
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* @param animate whether to smooth scroll to the new position
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*/
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public void setDate(long timeInMillis, boolean animate) {
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setDate(timeInMillis, animate, true);
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}
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/**
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* Moves to the month containing the specified day, optionally setting the
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* day as selected.
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*
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* @param timeInMillis the target day in milliseconds
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* @param animate whether to smooth scroll to the new position
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* @param setSelected whether to set the specified day as selected
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*/
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private void setDate(long timeInMillis, boolean animate, boolean setSelected) {
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boolean dateClamped = false;
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// Clamp the target day in milliseconds to the min or max if outside the range.
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if (timeInMillis < mMinDate.getTimeInMillis()) {
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timeInMillis = mMinDate.getTimeInMillis();
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dateClamped = true;
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} else if (timeInMillis > mMaxDate.getTimeInMillis()) {
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timeInMillis = mMaxDate.getTimeInMillis();
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dateClamped = true;
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}
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getTempCalendarForTime(timeInMillis);
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if (setSelected || dateClamped) {
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mSelectedDay.setTimeInMillis(timeInMillis);
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}
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final int position = getPositionFromDay(timeInMillis);
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if (position != mViewPager.getCurrentItem()) {
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mViewPager.setCurrentItem(position, animate);
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}
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mAdapter.setSelectedDay(mTempCalendar);
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}
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public long getDate() {
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return mSelectedDay.getTimeInMillis();
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}
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public boolean getBoundsForDate(long timeInMillis, Rect outBounds) {
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final int position = getPositionFromDay(timeInMillis);
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if (position != mViewPager.getCurrentItem()) {
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return false;
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}
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mTempCalendar.setTimeInMillis(timeInMillis);
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return mAdapter.getBoundsForDate(mTempCalendar, outBounds);
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}
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public void setFirstDayOfWeek(int firstDayOfWeek) {
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mAdapter.setFirstDayOfWeek(firstDayOfWeek);
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}
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public int getFirstDayOfWeek() {
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return mAdapter.getFirstDayOfWeek();
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}
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public void setMinDate(long timeInMillis) {
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mMinDate.setTimeInMillis(timeInMillis);
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onRangeChanged();
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}
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public long getMinDate() {
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return mMinDate.getTimeInMillis();
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}
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public void setMaxDate(long timeInMillis) {
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mMaxDate.setTimeInMillis(timeInMillis);
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onRangeChanged();
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}
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public long getMaxDate() {
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return mMaxDate.getTimeInMillis();
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}
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/**
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* Handles changes to date range.
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*/
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public void onRangeChanged() {
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mAdapter.setRange(mMinDate, mMaxDate);
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// Changing the min/max date changes the selection position since we
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// don't really have stable IDs. Jumps immediately to the new position.
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setDate(mSelectedDay.getTimeInMillis(), false, false);
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||
|
|
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
}
|