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
17package com.android.documentsui;
18
19import android.content.Context;
20import android.graphics.Rect;
21import android.util.AttributeSet;
22import android.util.TypedValue;
23import android.widget.LinearLayout;
24
25/**
26 * Layout for a single item in List mode.  This class overrides the default focus listener in order
27 * to light up a focus indicator when it is focused.
28 */
29public class ListItem extends LinearLayout
30{
31    public ListItem(Context context) {
32        super(context);
33    }
34
35    public ListItem(Context context, AttributeSet attrs) {
36        super(context, attrs);
37    }
38
39    @Override
40    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
41        TypedValue color = new TypedValue();
42        int colorId = gainFocus ? android.R.attr.colorAccent : android.R.color.transparent;
43        getContext().getTheme().resolveAttribute(colorId, color, true);
44
45        findViewById(R.id.focus_indicator).setBackgroundColor(color.data);
46        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
47    }
48}
49