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
17package com.android.settings.widget;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import android.widget.ProgressBar;
22
23import com.android.settings.R;
24
25/**
26 * A (determinate) progress bar in the form of a ring. The progress bar goes clockwise starting
27 * from the 12 o'clock position. This view maintain equal width and height using a strategy similar
28 * to "centerInside" for ImageView.
29 */
30public class RingProgressBar extends ProgressBar {
31
32    public RingProgressBar(Context context) {
33        this(context, null);
34    }
35
36    public RingProgressBar(Context context, AttributeSet attrs) {
37        this(context, attrs, 0);
38    }
39
40    public RingProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
41        this(context, attrs, defStyleAttr, R.style.RingProgressBarStyle);
42    }
43
44    public RingProgressBar(Context context, AttributeSet attrs, int defStyleAttr,
45            int defStyleRes) {
46        super(context, attrs, defStyleAttr, defStyleRes);
47    }
48
49    @Override
50    protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
51        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
52        final int measuredHeight = getMeasuredHeight();
53        final int measuredWidth = getMeasuredWidth();
54        final int shortSide = Math.min(measuredHeight, measuredWidth);
55        setMeasuredDimension(shortSide, shortSide);
56    }
57}
58