Annie Chin | e918fd2 | 2016-03-09 11:07:54 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2016 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 com.android.calculator2; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.util.AttributeSet; |
| 21 | import android.view.View; |
| 22 | import android.view.ViewGroup; |
| 23 | import android.widget.HorizontalScrollView; |
| 24 | |
| 25 | public class CalculatorScrollView extends HorizontalScrollView { |
| 26 | |
| 27 | public CalculatorScrollView(Context context) { |
| 28 | this(context, null /* attrs */); |
| 29 | } |
| 30 | |
| 31 | public CalculatorScrollView(Context context, AttributeSet attrs) { |
| 32 | this(context, attrs, 0 /* defStyleAttr */); |
| 33 | } |
| 34 | |
| 35 | public CalculatorScrollView(Context context, AttributeSet attrs, int defStyleAttr) { |
| 36 | super(context, attrs, defStyleAttr); |
| 37 | } |
| 38 | |
| 39 | @Override |
| 40 | protected void measureChild(View child, int parentWidthMeasureSpec, |
| 41 | int parentHeightMeasureSpec) { |
| 42 | // Allow child to be as wide as they want. |
| 43 | parentWidthMeasureSpec = MeasureSpec.makeMeasureSpec( |
| 44 | MeasureSpec.getSize(parentWidthMeasureSpec), MeasureSpec.UNSPECIFIED); |
| 45 | |
| 46 | final ViewGroup.LayoutParams lp = child.getLayoutParams(); |
| 47 | final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec, |
| 48 | 0 /* padding */, lp.width); |
| 49 | final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, |
| 50 | getPaddingTop() + getPaddingBottom(), lp.height); |
| 51 | |
| 52 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | protected void measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, |
| 57 | int parentHeightMeasureSpec, int heightUsed) { |
| 58 | // Allow child to be as wide as they want. |
| 59 | parentWidthMeasureSpec = MeasureSpec.makeMeasureSpec( |
| 60 | MeasureSpec.getSize(parentWidthMeasureSpec), MeasureSpec.UNSPECIFIED); |
| 61 | |
| 62 | final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); |
| 63 | final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec, |
| 64 | lp.leftMargin + lp.rightMargin, lp.width); |
| 65 | final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, |
| 66 | getPaddingTop() + getPaddingBottom() + lp.topMargin + lp.bottomMargin, lp.height); |
| 67 | |
| 68 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 69 | } |
| 70 | } |