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Commit 78bf1d32 authored by Alan Viverette's avatar Alan Viverette
Browse files

Move date picker arrows out of SimpleMonthView 

Also fixes incorrect docs in Drawable.

Bug: 20188255
Change-Id: I01c8563f734d9c1dad1e149bee80c651981e469f
parent 4b46ed3b

core/java/android/widget/CalendarViewMaterialDelegate.java

+2 −2
Original line number Original line Diff line number Diff line
@@ -19,6 +19,7 @@ package android.widget; 
import android.annotation.StyleRes;

import android.annotation.StyleRes;

import android.content.Context;

import android.content.Context;

import android.util.AttributeSet;

import android.util.AttributeSet;

import android.widget.DayPickerView.OnDaySelectedListener;





import java.util.Calendar;

import java.util.Calendar;
@@ -109,8 +110,7 @@ class CalendarViewMaterialDelegate extends CalendarView.AbstractCalendarViewDele 
        mOnDateChangeListener = listener;

        mOnDateChangeListener = listener;

    }

    }





    private final DayPickerView.OnDaySelectedListener mOnDaySelectedListener =

    private final OnDaySelectedListener mOnDaySelectedListener = new OnDaySelectedListener() {

            new DayPickerView.OnDaySelectedListener() {

        @Override

        @Override

        public void onDaySelected(DayPickerView view, Calendar day) {

        public void onDaySelected(DayPickerView view, Calendar day) {

            if (mOnDateChangeListener != null) {

            if (mOnDateChangeListener != null) {

core/java/android/widget/DatePickerCalendarDelegate.java

+1 −3
Original line number Original line Diff line number Diff line
@@ -34,8 +34,6 @@ import android.view.View; 
import android.view.View.OnClickListener;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.view.ViewGroup;

import android.view.accessibility.AccessibilityEvent;

import android.view.accessibility.AccessibilityEvent;

import android.view.animation.AlphaAnimation;

import android.view.animation.Animation;

import android.widget.DayPickerView.OnDaySelectedListener;

import android.widget.DayPickerView.OnDaySelectedListener;

import android.widget.YearPickerView.OnYearSelectedListener;

import android.widget.YearPickerView.OnYearSelectedListener;
@@ -549,7 +547,7 @@ class DatePickerCalendarDelegate extends DatePicker.AbstractDatePickerDelegate { 
        final int listPosition = ss.getListPosition();

        final int listPosition = ss.getListPosition();

        if (listPosition != -1) {

        if (listPosition != -1) {

            if (currentView == VIEW_MONTH_DAY) {

            if (currentView == VIEW_MONTH_DAY) {

                mDayPickerView.setCurrentItem(listPosition);

                mDayPickerView.setPosition(listPosition);

            } else if (currentView == VIEW_YEAR) {

            } else if (currentView == VIEW_YEAR) {

                final int listPositionOffset = ss.getListPositionOffset();

                final int listPositionOffset = ss.getListPositionOffset();

                mYearPickerView.setSelectionFromTop(listPosition, listPositionOffset);

                mYearPickerView.setSelectionFromTop(listPosition, listPositionOffset);

core/java/android/widget/DayPickerAdapter.java→core/java/android/widget/DayPickerPagerAdapter.java

+6 −15
Original line number Original line Diff line number Diff line
@@ -36,7 +36,7 @@ import java.util.Calendar; 
/**

/**

 * An adapter for a list of {@link android.widget.SimpleMonthView} items.

 * An adapter for a list of {@link android.widget.SimpleMonthView} items.

 */

 */

class DayPickerAdapter extends PagerAdapter {

class DayPickerPagerAdapter extends PagerAdapter {

    private static final int MONTHS_IN_YEAR = 12;

    private static final int MONTHS_IN_YEAR = 12;





    private final Calendar mMinDate = Calendar.getInstance();

    private final Calendar mMinDate = Calendar.getInstance();
@@ -63,7 +63,7 @@ class DayPickerAdapter extends PagerAdapter { 
    private int mCount;

    private int mCount;

    private int mFirstDayOfWeek;

    private int mFirstDayOfWeek;





    public DayPickerAdapter(@NonNull Context context, @LayoutRes int layoutResId,

    public DayPickerPagerAdapter(@NonNull Context context, @LayoutRes int layoutResId,

            @IdRes int calendarViewId) {

            @IdRes int calendarViewId) {

        mInflater = LayoutInflater.from(context);

        mInflater = LayoutInflater.from(context);

        mLayoutResId = layoutResId;

        mLayoutResId = layoutResId;
@@ -200,7 +200,8 @@ class DayPickerAdapter extends PagerAdapter { 




        final int yearOffset = (day.get(Calendar.YEAR) - mMinDate.get(Calendar.YEAR));

        final int yearOffset = (day.get(Calendar.YEAR) - mMinDate.get(Calendar.YEAR));

        final int monthOffset = (day.get(Calendar.MONTH) - mMinDate.get(Calendar.MONTH));

        final int monthOffset = (day.get(Calendar.MONTH) - mMinDate.get(Calendar.MONTH));

        return yearOffset * MONTHS_IN_YEAR + monthOffset;

        final int position = yearOffset * MONTHS_IN_YEAR + monthOffset;

        return position;

    }

    }





    @Override

    @Override
@@ -253,8 +254,6 @@ class DayPickerAdapter extends PagerAdapter { 




        v.setMonthParams(selectedDay, month, year, mFirstDayOfWeek,

        v.setMonthParams(selectedDay, month, year, mFirstDayOfWeek,

                enabledDayRangeStart, enabledDayRangeEnd);

                enabledDayRangeStart, enabledDayRangeEnd);

        v.setPrevEnabled(position > 0);

        v.setNextEnabled(position < mCount - 1);





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

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

        mItems.put(position, holder);

        mItems.put(position, holder);
@@ -298,17 +297,10 @@ class DayPickerAdapter extends PagerAdapter { 
                setSelectedDay(day);

                setSelectedDay(day);





                if (mOnDaySelectedListener != null) {

                if (mOnDaySelectedListener != null) {

                    mOnDaySelectedListener.onDaySelected(DayPickerAdapter.this, day);

                    mOnDaySelectedListener.onDaySelected(DayPickerPagerAdapter.this, day);

                }

                }

            }

            }

        }

        }



        @Override

        public void onNavigationClick(SimpleMonthView view, int direction, boolean animate) {

            if (mOnDaySelectedListener != null) {

                mOnDaySelectedListener.onNavigationClick(DayPickerAdapter.this, direction, animate);

            }

        }

    };

    };





    private static class ViewHolder {

    private static class ViewHolder {
@@ -324,7 +316,6 @@ class DayPickerAdapter extends PagerAdapter { 
    }

    }





    public interface OnDaySelectedListener {

    public interface OnDaySelectedListener {

        public void onDaySelected(DayPickerAdapter view, Calendar day);

        public void onDaySelected(DayPickerPagerAdapter view, Calendar day);

        public void onNavigationClick(DayPickerAdapter view, int direction, boolean animate);

    }

    }

}
 
}

core/java/android/widget/DayPickerView.java

+156 −109
Original line number Original line Diff line number Diff line 
/*

/*

 * Copyright (C) 2014 The Android Open Source Project

 * Copyright (C) 2015 The Android Open Source Project

 *

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * you may not use this file except in compliance with the License.
@@ -16,37 +16,44 @@ 




package android.widget;

package android.widget;





import com.android.internal.widget.ViewPager;

import com.android.internal.R;

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.Context;

import android.content.res.ColorStateList;

import android.content.res.ColorStateList;

import android.content.res.TypedArray;

import android.content.res.TypedArray;

import android.graphics.drawable.Drawable;

import android.util.AttributeSet;

import android.util.AttributeSet;

import android.util.MathUtils;

import android.util.MathUtils;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View;

import android.view.ViewGroup;

import android.view.accessibility.AccessibilityManager;





import java.util.ArrayList;

import java.util.Calendar;

import java.util.Calendar;

import java.util.Locale;

import java.util.Locale;





import libcore.icu.LocaleData;

import libcore.icu.LocaleData;





/**

class DayPickerView extends ViewGroup {

 * This displays a list of months in a calendar format with selectable days.

    private static final int DEFAULT_LAYOUT = R.layout.day_picker_content_material;

 */

class DayPickerView extends ViewPager {

    private static final int DEFAULT_START_YEAR = 1900;

    private static final int DEFAULT_START_YEAR = 1900;

    private static final int DEFAULT_END_YEAR = 2100;

    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 mSelectedDay = Calendar.getInstance();

    private final Calendar mMinDate = Calendar.getInstance();

    private final Calendar mMinDate = Calendar.getInstance();

    private final Calendar mMaxDate = Calendar.getInstance();

    private final Calendar mMaxDate = Calendar.getInstance();





    private final ArrayList<View> mMatchParentChildren = new ArrayList<>(1);

    private final AccessibilityManager mAccessibilityManager;



    private final ViewPager mViewPager;

    private final ImageButton mPrevButton;

    private final ImageButton mNextButton;





    private final DayPickerAdapter mAdapter;

    private final DayPickerPagerAdapter mAdapter;





    /** Temporary calendar used for date calculations. */

    /** Temporary calendar used for date calculations. */

    private Calendar mTempCalendar;

    private Calendar mTempCalendar;
@@ -57,17 +64,21 @@ class DayPickerView extends ViewPager { 
        this(context, null);

        this(context, null);

    }

    }





    public DayPickerView(Context context, AttributeSet attrs) {

    public DayPickerView(Context context, @Nullable AttributeSet attrs) {

        this(context, attrs, R.attr.calendarViewStyle);

        this(context, attrs, R.attr.calendarViewStyle);

    }

    }





    public DayPickerView(Context context, AttributeSet attrs, int defStyleAttr) {

    public DayPickerView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {

        this(context, attrs, defStyleAttr, 0);

        this(context, attrs, defStyleAttr, 0);

    }

    }





    public DayPickerView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {

    public DayPickerView(Context context, @Nullable AttributeSet attrs, int defStyleAttr,

            int defStyleRes) {

        super(context, attrs, defStyleAttr, defStyleRes);

        super(context, attrs, defStyleAttr, defStyleRes);





        mAccessibilityManager = (AccessibilityManager) context.getSystemService(

                Context.ACCESSIBILITY_SERVICE);



        final TypedArray a = context.obtainStyledAttributes(attrs,

        final TypedArray a = context.obtainStyledAttributes(attrs,

                R.styleable.CalendarView, defStyleAttr, defStyleRes);

                R.styleable.CalendarView, defStyleAttr, defStyleRes);
@@ -93,14 +104,44 @@ class DayPickerView extends ViewPager { 
        a.recycle();

        a.recycle();





        // Set up adapter.

        // Set up adapter.

        mAdapter = new DayPickerAdapter(context,

        mAdapter = new DayPickerPagerAdapter(context,

                R.layout.date_picker_month_item_material, R.id.month_view);

                R.layout.date_picker_month_item_material, R.id.month_view);

        mAdapter.setMonthTextAppearance(monthTextAppearanceResId);

        mAdapter.setMonthTextAppearance(monthTextAppearanceResId);

        mAdapter.setDayOfWeekTextAppearance(dayOfWeekTextAppearanceResId);

        mAdapter.setDayOfWeekTextAppearance(dayOfWeekTextAppearanceResId);

        mAdapter.setDayTextAppearance(dayTextAppearanceResId);

        mAdapter.setDayTextAppearance(dayTextAppearanceResId);

        mAdapter.setDaySelectorColor(daySelectorColor);

        mAdapter.setDaySelectorColor(daySelectorColor);





        setAdapter(mAdapter);

        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.

        // Set up min and max dates.

        final Calendar tempDate = Calendar.getInstance();

        final Calendar tempDate = Calendar.getInstance();
@@ -127,109 +168,68 @@ class DayPickerView extends ViewPager { 
        setDate(setDateMillis, false);

        setDate(setDateMillis, false);





        // Proxy selection callbacks to our own listener.

        // Proxy selection callbacks to our own listener.

        mAdapter.setOnDaySelectedListener(new DayPickerAdapter.OnDaySelectedListener() {

        mAdapter.setOnDaySelectedListener(new DayPickerPagerAdapter.OnDaySelectedListener() {

            @Override

            @Override

            public void onDaySelected(DayPickerAdapter adapter, Calendar day) {

            public void onDaySelected(DayPickerPagerAdapter adapter, Calendar day) {

                if (mOnDaySelectedListener != null) {

                if (mOnDaySelectedListener != null) {

                    mOnDaySelectedListener.onDaySelected(DayPickerView.this, day);

                    mOnDaySelectedListener.onDaySelected(DayPickerView.this, day);

                }

                }

            }

            }



            @Override

            public void onNavigationClick(DayPickerAdapter view, int direction, boolean animate) {

                // ViewPager clamps input values, so we don't need to worry

                // about passing invalid indices.

                final int nextItem = getCurrentItem() + direction;

                setCurrentItem(nextItem, animate);

            }

        });

        });

    }

    }





    @Override

    @Override

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        populate();

        final ViewPager viewPager = mViewPager;

        measureChild(viewPager, widthMeasureSpec, heightMeasureSpec);





        // Everything below is mostly copied from FrameLayout.

        final int measuredWidthAndState = viewPager.getMeasuredWidthAndState();

        int count = getChildCount();

        final int measuredHeightAndState = viewPager.getMeasuredHeightAndState();

        setMeasuredDimension(measuredWidthAndState, measuredHeightAndState);





        final boolean measureMatchParentChildren =

        final int pagerWidth = viewPager.getMeasuredWidth();

                MeasureSpec.getMode(widthMeasureSpec) != MeasureSpec.EXACTLY ||

        final int pagerHeight = viewPager.getMeasuredHeight();

                        MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY;

        final int buttonWidthSpec = MeasureSpec.makeMeasureSpec(pagerWidth, MeasureSpec.AT_MOST);



        final int buttonHeightSpec = MeasureSpec.makeMeasureSpec(pagerHeight, MeasureSpec.AT_MOST);

        int maxHeight = 0;

        mPrevButton.measure(buttonWidthSpec, buttonHeightSpec);

        int maxWidth = 0;

        mNextButton.measure(buttonWidthSpec, buttonHeightSpec);

        int childState = 0;



        for (int i = 0; i < count; i++) {

            final View child = getChildAt(i);

            if (child.getVisibility() != GONE) {

                measureChild(child, widthMeasureSpec, heightMeasureSpec);

                final LayoutParams lp = (LayoutParams) child.getLayoutParams();

                maxWidth = Math.max(maxWidth, child.getMeasuredWidth());

                maxHeight = Math.max(maxHeight, child.getMeasuredHeight());

                childState = combineMeasuredStates(childState, child.getMeasuredState());

                if (measureMatchParentChildren) {

                    if (lp.width == LayoutParams.MATCH_PARENT ||

                            lp.height == LayoutParams.MATCH_PARENT) {

                        mMatchParentChildren.add(child);

                    }

                }

    }

    }

        }



        // Account for padding too

        maxWidth += getPaddingLeft() + getPaddingRight();

        maxHeight += getPaddingTop() + getPaddingBottom();



        // Check against our minimum height and width

        maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight());

        maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth());



        // Check against our foreground's minimum height and width

        final Drawable drawable = getForeground();

        if (drawable != null) {

            maxHeight = Math.max(maxHeight, drawable.getMinimumHeight());

            maxWidth = Math.max(maxWidth, drawable.getMinimumWidth());

        }



        setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState),

                resolveSizeAndState(maxHeight, heightMeasureSpec,

                        childState << MEASURED_HEIGHT_STATE_SHIFT));



        count = mMatchParentChildren.size();

        if (count > 1) {

            for (int i = 0; i < count; i++) {

                final View child = mMatchParentChildren.get(i);





                final LayoutParams lp = (LayoutParams) child.getLayoutParams();

    @Override

                final int childWidthMeasureSpec;

    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {

                final int childHeightMeasureSpec;

        final ImageButton leftButton = mPrevButton;



        final ImageButton rightButton = mNextButton;

                if (lp.width == LayoutParams.MATCH_PARENT) {



                    childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(

        final int width = right - left;

                            getMeasuredWidth() - getPaddingLeft() - getPaddingRight(),

        final int height = bottom - top;

                            MeasureSpec.EXACTLY);

        mViewPager.layout(0, 0, width, height);

                } else {



                    childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec,

        if (mViewPager.getChildCount() < 1) {

                            getPaddingLeft() + getPaddingRight(),

            leftButton.setVisibility(View.INVISIBLE);

                            lp.width);

            rightButton.setVisibility(View.INVISIBLE);

                }

            return;



        }

                if (lp.height == LayoutParams.MATCH_PARENT) {



                    childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(

        final SimpleMonthView monthView = (SimpleMonthView) mViewPager.getChildAt(0);

                            getMeasuredHeight() - getPaddingTop() - getPaddingBottom(),

        final int monthHeight = monthView.getMonthHeight();

                            MeasureSpec.EXACTLY);

        final int cellWidth = monthView.getCellWidth();

                } else {



                    childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec,

        // Vertically center the previous/next buttons within the month

                            getPaddingTop() + getPaddingBottom(),

        // header, horizontally center within the day cell.

                            lp.height);

        final int leftDW = leftButton.getMeasuredWidth();

                }

        final int leftDH = leftButton.getMeasuredHeight();



        final int leftIconTop = monthView.getPaddingTop() + (monthHeight - leftDH) / 2;

                child.measure(childWidthMeasureSpec, childHeightMeasureSpec);

        final int leftIconLeft = monthView.getPaddingLeft() + (cellWidth - leftDW) / 2;

            }

        leftButton.layout(leftIconLeft, leftIconTop, leftIconLeft + leftDW, leftIconTop + leftDH);

        }

        leftButton.setVisibility(View.VISIBLE);





        mMatchParentChildren.clear();

        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);

        rightButton.setVisibility(View.VISIBLE);

    }

    }





    public void setDayOfWeekTextAppearance(int resId) {

    public void setDayOfWeekTextAppearance(int resId) {
@@ -284,8 +284,8 @@ class DayPickerView extends ViewPager { 
        }

        }





        final int position = getPositionFromDay(timeInMillis);

        final int position = getPositionFromDay(timeInMillis);

        if (position != getCurrentItem()) {

        if (position != mViewPager.getCurrentItem()) {

            setCurrentItem(position, animate);

            mViewPager.setCurrentItem(position, animate);

        }

        }





        mTempCalendar.setTimeInMillis(timeInMillis);

        mTempCalendar.setTimeInMillis(timeInMillis);
@@ -365,10 +365,57 @@ class DayPickerView extends ViewPager { 
     * Gets the position of the view that is most prominently displayed within the list view.

     * Gets the position of the view that is most prominently displayed within the list view.

     */

     */

    public int getMostVisiblePosition() {

    public int getMostVisiblePosition() {

        return getCurrentItem();

        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) {

            mPrevButton.setVisibility(

                    position > 0 ? View.VISIBLE : View.INVISIBLE);

            mNextButton.setVisibility(

                    position < (mAdapter.getCount() - 1) ? View.VISIBLE : View.INVISIBLE);

        }

    };



    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 {

    public interface OnDaySelectedListener {

        public void onDaySelected(DayPickerView view, Calendar day);

        void onDaySelected(DayPickerView view, Calendar day);

    }

    }

}
 
}

core/java/android/widget/DayPickerViewPager.java

0 → 100644
+137 −0
Original line number Original line Diff line number Diff line 
/*

 * 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.widget.ViewPager;



import android.content.Context;

import android.graphics.drawable.Drawable;

import android.util.AttributeSet;

import android.view.View;



import java.util.ArrayList;



/**

 * This displays a list of months in a calendar format with selectable days.

 */

class DayPickerViewPager extends ViewPager {

    private final ArrayList<View> mMatchParentChildren = new ArrayList<>(1);



    public DayPickerViewPager(Context context) {

        this(context, null);

    }



    public DayPickerViewPager(Context context, AttributeSet attrs) {

        this(context, attrs, 0);

    }



    public DayPickerViewPager(Context context, AttributeSet attrs, int defStyleAttr) {

        this(context, attrs, defStyleAttr, 0);

    }



    public DayPickerViewPager(Context context, AttributeSet attrs, int defStyleAttr,

            int defStyleRes) {

        super(context, attrs, defStyleAttr, defStyleRes);

    }



    @Override

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        populate();



        // Everything below is mostly copied from FrameLayout.

        int count = getChildCount();



        final boolean measureMatchParentChildren =

                MeasureSpec.getMode(widthMeasureSpec) != MeasureSpec.EXACTLY ||

                        MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY;



        int maxHeight = 0;

        int maxWidth = 0;

        int childState = 0;



        for (int i = 0; i < count; i++) {

            final View child = getChildAt(i);

            if (child.getVisibility() != GONE) {

                measureChild(child, widthMeasureSpec, heightMeasureSpec);

                final LayoutParams lp = (LayoutParams) child.getLayoutParams();

                maxWidth = Math.max(maxWidth, child.getMeasuredWidth());

                maxHeight = Math.max(maxHeight, child.getMeasuredHeight());

                childState = combineMeasuredStates(childState, child.getMeasuredState());

                if (measureMatchParentChildren) {

                    if (lp.width == LayoutParams.MATCH_PARENT ||

                            lp.height == LayoutParams.MATCH_PARENT) {

                        mMatchParentChildren.add(child);

                    }

                }

            }

        }



        // Account for padding too

        maxWidth += getPaddingLeft() + getPaddingRight();

        maxHeight += getPaddingTop() + getPaddingBottom();



        // Check against our minimum height and width

        maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight());

        maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth());



        // Check against our foreground's minimum height and width

        final Drawable drawable = getForeground();

        if (drawable != null) {

            maxHeight = Math.max(maxHeight, drawable.getMinimumHeight());

            maxWidth = Math.max(maxWidth, drawable.getMinimumWidth());

        }



        setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState),

                resolveSizeAndState(maxHeight, heightMeasureSpec,

                        childState << MEASURED_HEIGHT_STATE_SHIFT));



        count = mMatchParentChildren.size();

        if (count > 1) {

            for (int i = 0; i < count; i++) {

                final View child = mMatchParentChildren.get(i);



                final LayoutParams lp = (LayoutParams) child.getLayoutParams();

                final int childWidthMeasureSpec;

                final int childHeightMeasureSpec;



                if (lp.width == LayoutParams.MATCH_PARENT) {

                    childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(

                            getMeasuredWidth() - getPaddingLeft() - getPaddingRight(),

                            MeasureSpec.EXACTLY);

                } else {

                    childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec,

                            getPaddingLeft() + getPaddingRight(),

                            lp.width);

                }



                if (lp.height == LayoutParams.MATCH_PARENT) {

                    childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(

                            getMeasuredHeight() - getPaddingTop() - getPaddingBottom(),

                            MeasureSpec.EXACTLY);

                } else {

                    childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec,

                            getPaddingTop() + getPaddingBottom(),

                            lp.height);

                }



                child.measure(childWidthMeasureSpec, childHeightMeasureSpec);

            }

        }



        mMatchParentChildren.clear();

    }

}