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