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 androidx.leanback.widget;
15
16import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;
17
18import android.content.Context;
19import android.util.AttributeSet;
20import android.view.View;
21import android.widget.FrameLayout;
22
23import androidx.annotation.RestrictTo;
24
25/**
26 * Customized FrameLayout excludes margin of child from calculating the child size.
27 * So we can change left margin of rows while keep the width of rows unchanged without
28 * using hardcoded DIPS.
29 * @hide
30 */
31@RestrictTo(LIBRARY_GROUP)
32public class BrowseRowsFrameLayout extends FrameLayout {
33
34    public BrowseRowsFrameLayout(Context context) {
35        this(context ,null);
36    }
37
38    public BrowseRowsFrameLayout(Context context, AttributeSet attrs) {
39        this(context, attrs, 0);
40    }
41
42    public BrowseRowsFrameLayout(Context context, AttributeSet attrs,
43            int defStyle) {
44        super(context, attrs, defStyle);
45    }
46
47    @Override
48    protected void measureChildWithMargins(View child,
49            int parentWidthMeasureSpec, int widthUsed,
50            int parentHeightMeasureSpec, int heightUsed) {
51        final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
52        final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec,
53                getPaddingLeft() + getPaddingRight() + widthUsed, lp.width);
54        final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec,
55                getPaddingTop() + getPaddingBottom() + heightUsed, lp.height);
56        child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
57    }
58
59}
60