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      1 /*
      2  * Copyright (C) 2014 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.systemui.qs;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.graphics.Canvas;
     22 import android.graphics.Paint;
     23 import android.graphics.RectF;
     24 import android.util.AttributeSet;
     25 import android.view.View;
     26 
     27 import com.android.settingslib.Utils;
     28 import com.android.systemui.R;
     29 
     30 public class DataUsageGraph extends View {
     31 
     32     private final int mTrackColor;
     33     private final int mUsageColor;
     34     private final int mOverlimitColor;
     35     private final int mWarningColor;
     36     private final int mMarkerWidth;
     37     private final RectF mTmpRect = new RectF();
     38     private final Paint mTmpPaint = new Paint();
     39 
     40     private long mLimitLevel;
     41     private long mWarningLevel;
     42     private long mUsageLevel;
     43     private long mMaxLevel;
     44 
     45     public DataUsageGraph(Context context, AttributeSet attrs) {
     46         super(context, attrs);
     47         final Resources res = context.getResources();
     48         mTrackColor = Utils.getDefaultColor(context, R.color.data_usage_graph_track);
     49         mWarningColor = Utils.getDefaultColor(context, R.color.data_usage_graph_warning);
     50         mUsageColor = Utils.getColorAccent(context);
     51         mOverlimitColor = Utils.getColorError(context);
     52         mMarkerWidth = res.getDimensionPixelSize(R.dimen.data_usage_graph_marker_width);
     53     }
     54 
     55     public void setLevels(long limitLevel, long warningLevel, long usageLevel) {
     56         mLimitLevel = Math.max(0, limitLevel);
     57         mWarningLevel = Math.max(0, warningLevel);
     58         mUsageLevel = Math.max(0, usageLevel);
     59         mMaxLevel = Math.max(Math.max(Math.max(mLimitLevel, mWarningLevel), mUsageLevel), 1);
     60         postInvalidate();
     61     }
     62 
     63     @Override
     64     protected void onDraw(Canvas canvas) {
     65         super.onDraw(canvas);
     66 
     67         final RectF r = mTmpRect;
     68         final Paint p = mTmpPaint;
     69         final int w = getWidth();
     70         final int h = getHeight();
     71 
     72         final boolean overLimit = mLimitLevel > 0 && mUsageLevel > mLimitLevel;
     73         float usageRight = w * (mUsageLevel / (float) mMaxLevel);
     74         if (overLimit) {
     75             // compute the gap
     76             usageRight = w * (mLimitLevel / (float) mMaxLevel) - (mMarkerWidth / 2);
     77             usageRight = Math.min(Math.max(usageRight, mMarkerWidth), w - mMarkerWidth * 2);
     78 
     79             // draw overlimit
     80             r.set(usageRight + mMarkerWidth, 0, w, h);
     81             p.setColor(mOverlimitColor);
     82             canvas.drawRect(r, p);
     83         } else {
     84             // draw track
     85             r.set(0, 0, w, h);
     86             p.setColor(mTrackColor);
     87             canvas.drawRect(r, p);
     88         }
     89 
     90         // draw usage
     91         r.set(0, 0, usageRight, h);
     92         p.setColor(mUsageColor);
     93         canvas.drawRect(r, p);
     94 
     95         // draw warning marker
     96         float warningLeft = w * (mWarningLevel / (float) mMaxLevel) - mMarkerWidth / 2;
     97         warningLeft = Math.min(Math.max(warningLeft, 0), w - mMarkerWidth);
     98         r.set(warningLeft, 0, warningLeft + mMarkerWidth, h);
     99         p.setColor(mWarningColor);
    100         canvas.drawRect(r, p);
    101     }
    102 }
    103