| /* |
| * 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.content.Context; |
| import android.graphics.drawable.Drawable; |
| import android.util.AttributeSet; |
| import android.view.View; |
| |
| import com.android.internal.widget.ViewPager; |
| |
| import java.util.ArrayList; |
| import java.util.function.Predicate; |
| |
| /** |
| * 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(); |
| } |
| |
| @Override |
| protected <T extends View> T findViewByPredicateTraversal(Predicate<View> predicate, |
| View childToSkip) { |
| if (predicate.test(this)) { |
| return (T) this; |
| } |
| |
| // Always try the selected view first. |
| final DayPickerPagerAdapter adapter = (DayPickerPagerAdapter) getAdapter(); |
| final SimpleMonthView current = adapter.getView(getCurrent()); |
| if (current != childToSkip && current != null) { |
| final View v = current.findViewByPredicate(predicate); |
| if (v != null) { |
| return (T) v; |
| } |
| } |
| |
| final int len = getChildCount(); |
| for (int i = 0; i < len; i++) { |
| final View child = getChildAt(i); |
| |
| if (child != childToSkip && child != current) { |
| final View v = child.findViewByPredicate(predicate); |
| |
| if (v != null) { |
| return (T) v; |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| } |