1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14package android.support.v17.leanback.widget;
15
16import android.content.Context;
17import android.util.AttributeSet;
18import android.view.View;
19import android.widget.FrameLayout;
20
21/**
22 * Customized FrameLayout excludes margin of child from calculating the child size.
23 * So we can change left margin of rows while keep the width of rows unchanged without
24 * using hardcoded DIPS.
25 * @hide
26 */
27public class BrowseRowsFrameLayout extends FrameLayout {
28
29    public BrowseRowsFrameLayout(Context context) {
30        this(context ,null);
31    }
32
33    public BrowseRowsFrameLayout(Context context, AttributeSet attrs) {
34        this(context, attrs, 0);
35    }
36
37    public BrowseRowsFrameLayout(Context context, AttributeSet attrs,
38            int defStyle) {
39        super(context, attrs, defStyle);
40    }
41
42    @Override
43    protected void measureChildWithMargins(View child,
44            int parentWidthMeasureSpec, int widthUsed,
45            int parentHeightMeasureSpec, int heightUsed) {
46        final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
47        final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec,
48                getPaddingLeft() + getPaddingRight() + widthUsed, lp.width);
49        final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec,
50                getPaddingTop() + getPaddingBottom() + heightUsed, lp.height);
51        child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
52    }
53
54}
55