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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
      5  * except 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
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 
     15 package com.android.settings.fuelgauge;
     16 
     17 import android.annotation.Nullable;
     18 import android.content.Context;
     19 import android.graphics.Canvas;
     20 import android.graphics.Paint;
     21 import android.util.AttributeSet;
     22 import android.util.SparseIntArray;
     23 import android.view.View;
     24 
     25 public class BatteryActiveView extends View {
     26 
     27     private final Paint mPaint = new Paint();
     28     private BatteryActiveProvider mProvider;
     29 
     30     public BatteryActiveView(Context context, @Nullable AttributeSet attrs) {
     31         super(context, attrs);
     32     }
     33 
     34     public void setProvider(BatteryActiveProvider provider) {
     35         mProvider = provider;
     36         if (getWidth() != 0) {
     37             postInvalidate();
     38         }
     39     }
     40 
     41     @Override
     42     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
     43         super.onSizeChanged(w, h, oldw, oldh);
     44         if (getWidth() != 0) {
     45             postInvalidate();
     46         }
     47     }
     48 
     49     @Override
     50     protected void onDraw(Canvas canvas) {
     51         if (mProvider == null) {
     52             return;
     53         }
     54         SparseIntArray array = mProvider.getColorArray();
     55         float period = mProvider.getPeriod();
     56         for (int i = 0; i < array.size() - 1; i++) {
     57             drawColor(canvas, array.keyAt(i), array.keyAt(i + 1), array.valueAt(i), period);
     58         }
     59     }
     60 
     61     private void drawColor(Canvas canvas, int start, int end, int color, float period) {
     62         if (color == 0) {
     63             return;
     64         }
     65         mPaint.setColor(color);
     66         canvas.drawRect(start / period * getWidth(), 0, end / period * getWidth(), getHeight(),
     67                 mPaint);
     68     }
     69 
     70     public interface BatteryActiveProvider {
     71         boolean hasData();
     72         long getPeriod();
     73         SparseIntArray getColorArray();
     74     }
     75 }
     76