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 17 package com.android.settings.widget; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import android.widget.ProgressBar; 22 23 import 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 */ 30 public class RingProgressBar extends ProgressBar { 31 RingProgressBar(Context context)32 public RingProgressBar(Context context) { 33 this(context, null); 34 } 35 RingProgressBar(Context context, AttributeSet attrs)36 public RingProgressBar(Context context, AttributeSet attrs) { 37 this(context, attrs, 0); 38 } 39 RingProgressBar(Context context, AttributeSet attrs, int defStyleAttr)40 public RingProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { 41 this(context, attrs, defStyleAttr, R.style.RingProgressBarStyle); 42 } 43 RingProgressBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)44 public RingProgressBar(Context context, AttributeSet attrs, int defStyleAttr, 45 int defStyleRes) { 46 super(context, attrs, defStyleAttr, defStyleRes); 47 } 48 49 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)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