Alan Viverette | 78bf1d3 | 2015-04-17 10:39:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.widget; |
| 18 | |
| 19 | import com.android.internal.widget.ViewPager; |
| 20 | |
| 21 | import android.content.Context; |
| 22 | import android.graphics.drawable.Drawable; |
| 23 | import android.util.AttributeSet; |
| 24 | import android.view.View; |
| 25 | |
| 26 | import java.util.ArrayList; |
| 27 | |
| 28 | /** |
| 29 | * This displays a list of months in a calendar format with selectable days. |
| 30 | */ |
| 31 | class DayPickerViewPager extends ViewPager { |
| 32 | private final ArrayList<View> mMatchParentChildren = new ArrayList<>(1); |
| 33 | |
| 34 | public DayPickerViewPager(Context context) { |
| 35 | this(context, null); |
| 36 | } |
| 37 | |
| 38 | public DayPickerViewPager(Context context, AttributeSet attrs) { |
| 39 | this(context, attrs, 0); |
| 40 | } |
| 41 | |
| 42 | public DayPickerViewPager(Context context, AttributeSet attrs, int defStyleAttr) { |
| 43 | this(context, attrs, defStyleAttr, 0); |
| 44 | } |
| 45 | |
| 46 | public DayPickerViewPager(Context context, AttributeSet attrs, int defStyleAttr, |
| 47 | int defStyleRes) { |
| 48 | super(context, attrs, defStyleAttr, defStyleRes); |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| 53 | populate(); |
| 54 | |
| 55 | // Everything below is mostly copied from FrameLayout. |
| 56 | int count = getChildCount(); |
| 57 | |
| 58 | final boolean measureMatchParentChildren = |
| 59 | MeasureSpec.getMode(widthMeasureSpec) != MeasureSpec.EXACTLY || |
| 60 | MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY; |
| 61 | |
| 62 | int maxHeight = 0; |
| 63 | int maxWidth = 0; |
| 64 | int childState = 0; |
| 65 | |
| 66 | for (int i = 0; i < count; i++) { |
| 67 | final View child = getChildAt(i); |
| 68 | if (child.getVisibility() != GONE) { |
| 69 | measureChild(child, widthMeasureSpec, heightMeasureSpec); |
| 70 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 71 | maxWidth = Math.max(maxWidth, child.getMeasuredWidth()); |
| 72 | maxHeight = Math.max(maxHeight, child.getMeasuredHeight()); |
| 73 | childState = combineMeasuredStates(childState, child.getMeasuredState()); |
| 74 | if (measureMatchParentChildren) { |
| 75 | if (lp.width == LayoutParams.MATCH_PARENT || |
| 76 | lp.height == LayoutParams.MATCH_PARENT) { |
| 77 | mMatchParentChildren.add(child); |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | // Account for padding too |
| 84 | maxWidth += getPaddingLeft() + getPaddingRight(); |
| 85 | maxHeight += getPaddingTop() + getPaddingBottom(); |
| 86 | |
| 87 | // Check against our minimum height and width |
| 88 | maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight()); |
| 89 | maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth()); |
| 90 | |
| 91 | // Check against our foreground's minimum height and width |
| 92 | final Drawable drawable = getForeground(); |
| 93 | if (drawable != null) { |
| 94 | maxHeight = Math.max(maxHeight, drawable.getMinimumHeight()); |
| 95 | maxWidth = Math.max(maxWidth, drawable.getMinimumWidth()); |
| 96 | } |
| 97 | |
| 98 | setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState), |
| 99 | resolveSizeAndState(maxHeight, heightMeasureSpec, |
| 100 | childState << MEASURED_HEIGHT_STATE_SHIFT)); |
| 101 | |
| 102 | count = mMatchParentChildren.size(); |
| 103 | if (count > 1) { |
| 104 | for (int i = 0; i < count; i++) { |
| 105 | final View child = mMatchParentChildren.get(i); |
| 106 | |
| 107 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 108 | final int childWidthMeasureSpec; |
| 109 | final int childHeightMeasureSpec; |
| 110 | |
| 111 | if (lp.width == LayoutParams.MATCH_PARENT) { |
| 112 | childWidthMeasureSpec = MeasureSpec.makeMeasureSpec( |
| 113 | getMeasuredWidth() - getPaddingLeft() - getPaddingRight(), |
| 114 | MeasureSpec.EXACTLY); |
| 115 | } else { |
| 116 | childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec, |
| 117 | getPaddingLeft() + getPaddingRight(), |
| 118 | lp.width); |
| 119 | } |
| 120 | |
| 121 | if (lp.height == LayoutParams.MATCH_PARENT) { |
| 122 | childHeightMeasureSpec = MeasureSpec.makeMeasureSpec( |
| 123 | getMeasuredHeight() - getPaddingTop() - getPaddingBottom(), |
| 124 | MeasureSpec.EXACTLY); |
| 125 | } else { |
| 126 | childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec, |
| 127 | getPaddingTop() + getPaddingBottom(), |
| 128 | lp.height); |
| 129 | } |
| 130 | |
| 131 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | mMatchParentChildren.clear(); |
| 136 | } |
| 137 | } |