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      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 
     17 package com.android.cts.verifier;
     18 
     19 import android.annotation.TargetApi;
     20 import android.content.Context;
     21 import android.os.Handler;
     22 import android.os.SystemClock;
     23 import android.util.AttributeSet;
     24 import android.widget.ProgressBar;
     25 
     26 /**
     27  * Can be used to show time outs for events. A progress bar will be displayed to the user.
     28  * On calling start, it will start filling up.
     29  */
     30 public class TimerProgressBar extends ProgressBar {
     31   public TimerProgressBar(Context context) {
     32     super(context);
     33     setHandler(context);
     34   }
     35 
     36   public TimerProgressBar(Context context, AttributeSet attrs) {
     37     super(context, attrs);
     38     setHandler(context);
     39   }
     40 
     41   public TimerProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
     42     super(context, attrs, defStyleAttr);
     43     setHandler(context);
     44   }
     45 
     46   @TargetApi(21)
     47   public TimerProgressBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
     48     super(context, attrs, defStyleAttr, defStyleRes);
     49     setHandler(context);
     50   }
     51 
     52   private void setHandler(Context context) {
     53     mHandler = new Handler(context.getMainLooper());
     54   }
     55 
     56   private Handler mHandler;
     57   private TimerExpiredCallback mTimerExpiredCallback;
     58   private long mStartTime;
     59   private long mDuration;
     60   private long mStepSize;
     61   private boolean mForceComplete;
     62 
     63   private Runnable mProgressCallback = new Runnable() {
     64     @Override
     65     public void run() {
     66       if (mForceComplete) {
     67         TimerProgressBar.this.setProgress(TimerProgressBar.this.getMax());
     68         return;
     69       }
     70 
     71       long currentTime = SystemClock.elapsedRealtime();
     72       int progress = (int) ((currentTime - mStartTime) / mStepSize);
     73       progress = Math.min(progress, TimerProgressBar.this.getMax());
     74       TimerProgressBar.this.setProgress(progress);
     75 
     76       if (mStartTime + mDuration > currentTime) {
     77         mHandler.postDelayed(this, mStepSize);
     78       } else {
     79         if (mTimerExpiredCallback != null) {
     80           mTimerExpiredCallback.onTimerExpired();
     81         }
     82       }
     83     }
     84   };
     85 
     86   public void start(long duration, long stepSize) {
     87     start(duration, stepSize, null);
     88   }
     89 
     90   /**
     91    * Start filling up the progress bar.
     92    *
     93    * @param duration Time in milliseconds the progress bar takes to fill up completely
     94    * @param stepSize Time in milliseconds between consecutive updates to progress bar's progress
     95    * @param callback Callback that should be executed after the progress bar is filled completely (i.e. timer expires)
     96    */
     97   public void start(long duration, long stepSize, TimerExpiredCallback callback) {
     98     mDuration = duration;
     99     mStepSize = stepSize;
    100     mStartTime = SystemClock.elapsedRealtime();
    101     mForceComplete = false;
    102     mTimerExpiredCallback = callback;
    103     this.setMax((int) (duration / stepSize));
    104     this.setProgress(0);
    105     mHandler.post(mProgressCallback);
    106   }
    107 
    108   /**
    109    * Fill the progress bar completely. Timer expired callback won't be executed.
    110    */
    111   public void forceComplete() {
    112     mForceComplete = true;
    113   }
    114 
    115   public interface TimerExpiredCallback {
    116     void onTimerExpired();
    117   }
    118 
    119 }
    120