mobile/android/base/widget/FlowLayout.java@b8a032363ba2 (annotated)
mobile/android/base/widget/FlowLayout.java
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 3 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | package org.mozilla.gecko.widget; |
| michael@0 | 6 | |
| michael@0 | 7 | import org.mozilla.gecko.R; |
| michael@0 | 8 | |
| michael@0 | 9 | import android.content.Context; |
| michael@0 | 10 | import android.content.res.TypedArray; |
| michael@0 | 11 | import android.util.AttributeSet; |
| michael@0 | 12 | import android.view.View; |
| michael@0 | 13 | import android.view.ViewGroup; |
| michael@0 | 14 | |
| michael@0 | 15 | public class FlowLayout extends ViewGroup { |
| michael@0 | 16 | private int mSpacing; |
| michael@0 | 17 | |
| michael@0 | 18 | public FlowLayout(Context context) { |
| michael@0 | 19 | super(context); |
| michael@0 | 20 | } |
| michael@0 | 21 | |
| michael@0 | 22 | public FlowLayout(Context context, AttributeSet attrs) { |
| michael@0 | 23 | super(context, attrs); |
| michael@0 | 24 | TypedArray a = context.obtainStyledAttributes(attrs, org.mozilla.gecko.R.styleable.FlowLayout); |
| michael@0 | 25 | mSpacing = a.getDimensionPixelSize(R.styleable.FlowLayout_spacing, (int) context.getResources().getDimension(R.dimen.flow_layout_spacing)); |
| michael@0 | 26 | a.recycle(); |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | @Override |
| michael@0 | 30 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| michael@0 | 31 | final int parentWidth = MeasureSpec.getSize(widthMeasureSpec); |
| michael@0 | 32 | final int childCount = getChildCount(); |
| michael@0 | 33 | int rowWidth = 0; |
| michael@0 | 34 | int totalWidth = 0; |
| michael@0 | 35 | int totalHeight = 0; |
| michael@0 | 36 | boolean firstChild = true; |
| michael@0 | 37 | |
| michael@0 | 38 | for (int i = 0; i < childCount; i++) { |
| michael@0 | 39 | final View child = getChildAt(i); |
| michael@0 | 40 | if (child.getVisibility() == GONE) |
| michael@0 | 41 | continue; |
| michael@0 | 42 | |
| michael@0 | 43 | measureChild(child, widthMeasureSpec, heightMeasureSpec); |
| michael@0 | 44 | |
| michael@0 | 45 | final int childWidth = child.getMeasuredWidth(); |
| michael@0 | 46 | final int childHeight = child.getMeasuredHeight(); |
| michael@0 | 47 | |
| michael@0 | 48 | if (firstChild || (rowWidth + childWidth > parentWidth)) { |
| michael@0 | 49 | rowWidth = 0; |
| michael@0 | 50 | totalHeight += childHeight; |
| michael@0 | 51 | if (!firstChild) |
| michael@0 | 52 | totalHeight += mSpacing; |
| michael@0 | 53 | firstChild = false; |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | rowWidth += childWidth; |
| michael@0 | 57 | |
| michael@0 | 58 | if (rowWidth > totalWidth) |
| michael@0 | 59 | totalWidth = rowWidth; |
| michael@0 | 60 | |
| michael@0 | 61 | rowWidth += mSpacing; |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | setMeasuredDimension(totalWidth, totalHeight); |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | @Override |
| michael@0 | 68 | protected void onLayout(boolean changed, int l, int t, int r, int b) { |
| michael@0 | 69 | final int childCount = getChildCount(); |
| michael@0 | 70 | final int totalWidth = r - l; |
| michael@0 | 71 | int x = 0; |
| michael@0 | 72 | int y = 0; |
| michael@0 | 73 | int prevChildHeight = 0; |
| michael@0 | 74 | |
| michael@0 | 75 | for (int i = 0; i < childCount; i++) { |
| michael@0 | 76 | final View child = getChildAt(i); |
| michael@0 | 77 | if (child.getVisibility() == GONE) |
| michael@0 | 78 | continue; |
| michael@0 | 79 | |
| michael@0 | 80 | final int childWidth = child.getMeasuredWidth(); |
| michael@0 | 81 | final int childHeight = child.getMeasuredHeight(); |
| michael@0 | 82 | if (x + childWidth > totalWidth) { |
| michael@0 | 83 | x = 0; |
| michael@0 | 84 | y += prevChildHeight + mSpacing; |
| michael@0 | 85 | } |
| michael@0 | 86 | prevChildHeight = childHeight; |
| michael@0 | 87 | child.layout(x, y, x + childWidth, y + childHeight); |
| michael@0 | 88 | x += childWidth + mSpacing; |
| michael@0 | 89 | } |
| michael@0 | 90 | } |
| michael@0 | 91 | } |
