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
17package com.android.systemui.qs;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.graphics.Canvas;
22import android.graphics.Paint;
23import android.graphics.RectF;
24import android.util.AttributeSet;
25import android.view.View;
26
27import com.android.settingslib.Utils;
28import com.android.systemui.R;
29
30public 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