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Copyright 2019 The Chromium Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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A visualization for
[Flutter GitHub repository](https://github.com/flutter/flutter/) metadata.
Created for Google by [Larva Labs](http://larvalabs.com/), a team of creative
technologists who make things for Android, iPhone, and the Web.
## Data Notes
The data starts the week of Oct 19, 2014 which is the first commit. This is week
0 in our data arrays, but it is week 43 in 2014. Year boundaries are then offset
by 9 weeks.

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include: package:flutter_lints/flutter.yaml
linter:
rules:
avoid_print: false
prefer_single_quotes: true

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185 717
186 644
187 646
188 526
189 756
190 457
191 2248
192 1649
193 906
194 794
195 702
196 591
197 725
198 584
199 502
200 477
201 506
202 488
203 398
204 738
205 549
206 339
207 455
208 398
209 452
210 424
211 485
212 415
213 411
214 493
215 2359
216 1458
217 860
218 764
219 716
220 741
221 999
222 904
223 669
224 430
225 729
226 793
227 976
228 1032
229 973
230 998
231 1032
232 87
1 22 8
2 23 4
3 24 3
4 25 2
5 26 1
6 27 356
7 28 1108
8 29 118
9 30 36
10 31 28
11 32 19
12 33 24
13 34 11
14 35 6
15 36 20
16 37 14
17 38 17
18 39 1
19 40 3
20 43 1
21 44 2
22 47 2
23 48 1
24 50 1
25 51 1
26 52 1
27 53 5
28 54 85
29 55 68
30 56 54
31 57 116
32 58 43
33 59 36
34 60 24
35 61 25
36 62 26
37 63 31
38 64 28
39 65 23
40 66 19
41 67 15
42 68 12
43 69 22
44 70 15
45 71 21
46 72 18
47 73 19
48 74 11
49 75 15
50 76 8
51 77 7
52 78 10
53 79 3
54 80 10
55 81 9
56 82 30
57 83 17
58 84 13
59 85 12
60 86 4
61 87 25
62 88 58
63 89 7
64 90 13
65 91 8
66 92 10
67 93 11
68 94 38
69 95 112
70 96 44
71 97 22
72 98 36
73 99 25
74 100 10
75 101 32
76 102 11
77 103 12
78 104 20
79 105 107
80 106 38
81 107 33
82 108 41
83 109 21
84 110 27
85 111 17
86 112 22
87 113 10
88 114 9
89 115 54
90 116 32
91 117 35
92 118 26
93 119 19
94 120 30
95 121 83
96 122 30
97 123 33
98 124 31
99 125 28
100 126 13
101 127 77
102 128 41
103 129 27
104 130 36
105 131 26
106 132 26
107 133 248
108 134 166
109 135 138
110 136 91
111 137 63
112 138 61
113 139 169
114 140 144
115 141 69
116 142 45
117 143 45
118 144 43
119 145 59
120 146 50
121 147 86
122 148 114
123 149 96
124 150 93
125 151 74
126 152 944
127 153 352
128 154 130
129 155 159
130 156 111
131 157 105
132 158 64
133 159 113
134 160 121
135 161 150
136 162 167
137 163 120
138 164 208
139 165 151
140 166 92
141 167 96
142 168 116
143 169 108
144 170 139
145 171 156
146 172 162
147 173 108
148 174 353
149 175 4210
150 176 2601
151 177 1227
152 178 798
153 179 594
154 180 464
155 181 633
156 182 514
157 183 400
158 184 388
159 185 717
160 186 644
161 187 646
162 188 526
163 189 756
164 190 457
165 191 2248
166 192 1649
167 193 906
168 194 794
169 195 702
170 196 591
171 197 725
172 198 584
173 199 502
174 200 477
175 201 506
176 202 488
177 203 398
178 204 738
179 205 549
180 206 339
181 207 455
182 208 398
183 209 452
184 210 424
185 211 485
186 212 415
187 213 411
188 214 493
189 215 2359
190 216 1458
191 217 860
192 218 764
193 219 716
194 220 741
195 221 999
196 222 904
197 223 669
198 224 430
199 225 729
200 226 793
201 227 976
202 228 1032
203 229 973
204 230 998
205 231 1032
206 232 87

79
web/github_dataviz/lib/catmull.dart
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@@ -1,79 +0,0 @@
import 'package:github_dataviz/mathutils.dart';
class ControlPointAndValue {
late int point;
double? value;
ControlPointAndValue() {
value = 0;
point = 2;
}
}
class CatmullInterpolator implements Interpolator {
List<Point2D> controlPoints;
CatmullInterpolator(this.controlPoints);
@override
double get(double v) {
for (int i = 2; i < controlPoints.length - 1; i++) {
if (controlPoints[i].x >= v) {
double t = (v - controlPoints[i - 1].x) /
(controlPoints[i].x - controlPoints[i - 1].x);
double p0 = controlPoints[i - 2].y;
double p1 = controlPoints[i - 1].y;
double p2 = controlPoints[i].y;
double p3 = controlPoints[i + 1].y;
return 0.5 *
((2 * p1) +
(p2 - p0) * t +
(2 * p0 - 5 * p1 + 4 * p2 - p3) * t * t +
(3 * p1 - p0 - 3 * p2 + p3) * t * t * t);
}
}
// Will be unreachable if the control points were set up right
return 0;
}
ControlPointAndValue progressiveGet(ControlPointAndValue cpv) {
double? v = cpv.value;
for (int i = cpv.point; i < controlPoints.length - 1; i++) {
if (controlPoints[i].x >= v!) {
double t = (v - controlPoints[i - 1].x) /
(controlPoints[i].x - controlPoints[i - 1].x);
double p0 = controlPoints[i - 2].y;
double p1 = controlPoints[i - 1].y;
double p2 = controlPoints[i].y;
double p3 = controlPoints[i + 1].y;
cpv.value = 0.5 *
((2 * p1) +
(p2 - p0) * t +
(2 * p0 - 5 * p1 + 4 * p2 - p3) * t * t +
(3 * p1 - p0 - 3 * p2 + p3) * t * t * t);
cpv.point = i;
return cpv;
}
}
// Will be unreachable if the control points were set up right
return cpv;
}
static void test() {
final controlPoints = <Point2D>[];
controlPoints.add(Point2D(-1, 1));
controlPoints.add(Point2D(0, 1));
controlPoints.add(Point2D(1, -1));
controlPoints.add(Point2D(3, 4));
controlPoints.add(Point2D(10, -2));
controlPoints.add(Point2D(11, -2));
CatmullInterpolator catmull = CatmullInterpolator(controlPoints);
print(catmull.get(0));
print(catmull.get(1));
print(catmull.get(2));
print(catmull.get(5));
print(catmull.get(7));
print(catmull.get(8));
print(catmull.get(10));
}
}

8
web/github_dataviz/lib/constants.dart
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import 'package:flutter/material.dart';
class Constants {
static const Color backgroundColor = Color(0xFF000020);
static const Color timelineLineColor = Color(0x60FFFFFF);
static const Color milestoneColor = Color(0x40FFFFFF);
static const Color milestoneTimelineColor = Colors.white;
}

14
web/github_dataviz/lib/data/contribution_data.dart
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@@ -1,14 +0,0 @@
class ContributionData {
int weekTime;
int add;
int delete;
int change;
ContributionData(this.weekTime, this.add, this.delete, this.change);
static ContributionData fromJson(Map<String, dynamic> jsonMap) {
ContributionData data = ContributionData(
jsonMap['w'], jsonMap['a'], jsonMap['d'], jsonMap['c']);
return data;
}
}

6
web/github_dataviz/lib/data/data_series.dart
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@@ -1,6 +0,0 @@
class DataSeries {
String label;
List<int> series;
DataSeries(this.label, this.series);
}

6
web/github_dataviz/lib/data/stat_for_week.dart
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@@ -1,6 +0,0 @@
class StatForWeek {
int weekIndex;
int stat;
StatForWeek(this.weekIndex, this.stat);
}

12
web/github_dataviz/lib/data/user.dart
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@@ -1,12 +0,0 @@
class User {
int id;
String username;
String avatarUrl;
User(this.id, this.username, this.avatarUrl);
static User fromJson(Map<String, dynamic> jsonMap) {
User user = User(jsonMap['id'], jsonMap['login'], jsonMap['avatar_url']);
return user;
}
}

18
web/github_dataviz/lib/data/user_contribution.dart
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@@ -1,18 +0,0 @@
import 'package:github_dataviz/data/contribution_data.dart';
import 'package:github_dataviz/data/user.dart';
class UserContribution {
User user;
List<ContributionData> contributions;
UserContribution(this.user, this.contributions);
static UserContribution fromJson(Map<String, dynamic> jsonMap) {
List<ContributionData> contributionList = (jsonMap['weeks'] as List)
.map((e) => ContributionData.fromJson(e))
.toList();
var userContribution =
UserContribution(User.fromJson(jsonMap['author']), contributionList);
return userContribution;
}
}

23
web/github_dataviz/lib/data/week_label.dart
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@@ -1,23 +0,0 @@
import 'package:intl/intl.dart';
class WeekLabel {
int? weekNum;
String label;
WeekLabel(this.weekNum, this.label);
WeekLabel.forDate(DateTime date, this.label) {
int year = getYear(date);
int weekOfYearNum = getWeekNumber(date);
weekNum = 9 + ((year - 2015) * 52) + weekOfYearNum;
}
int getYear(DateTime date) {
return int.parse(DateFormat('y').format(date));
}
int getWeekNumber(DateTime date) {
int dayOfYear = int.parse(DateFormat('D').format(date));
return ((dayOfYear - date.weekday + 10) / 7).floor();
}
}

336
web/github_dataviz/lib/layered_chart.dart
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@@ -1,336 +0,0 @@
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:github_dataviz/catmull.dart';
import 'package:github_dataviz/constants.dart';
import 'package:github_dataviz/data/data_series.dart';
import 'package:github_dataviz/data/week_label.dart';
import 'package:github_dataviz/mathutils.dart';
class LayeredChart extends StatefulWidget {
final List<DataSeries> dataToPlot;
final List<WeekLabel> milestones;
final double animationValue;
const LayeredChart(this.dataToPlot, this.milestones, this.animationValue,
{Key? key})
: super(key: key);
@override
State<LayeredChart> createState() {
return _LayeredChartState();
}
}
class _LayeredChartState extends State<LayeredChart> {
late List<Path> paths;
late List<Path> capPaths;
late List<double> maxValues;
late double theta;
late double graphHeight;
late List<TextPainter> labelPainter;
late List<TextPainter> milestonePainter;
Size? lastSize;
void buildPaths(
Size size,
List<DataSeries> dataToPlot,
List<WeekLabel> milestones,
int numPoints,
double graphGap,
double margin,
double capTheta,
double capSize) {
double screenRatio = size.width / size.height;
double degrees = MathUtils.clampedMap(screenRatio, 0.5, 2.5, 50, 5);
theta = pi * degrees / 180;
graphHeight = MathUtils.clampedMap(screenRatio, 0.5, 2.5, 50, 150);
int m = dataToPlot.length;
paths = [];
capPaths = [];
maxValues = [];
for (int i = 0; i < m; i++) {
int n = dataToPlot[i].series.length;
maxValues.add(0);
for (int j = 0; j < n; j++) {
double v = dataToPlot[i].series[j].toDouble();
if (v > maxValues[i]) {
maxValues[i] = v;
}
}
}
double totalGap = m * graphGap;
double xIndent = totalGap / tan(capTheta);
double startX = margin + xIndent;
double endX = size.width - margin;
double startY = size.height;
double endY = startY - (endX - startX) * tan(theta);
double xWidth = (endX - startX) / numPoints;
double capRangeX = capSize * cos(capTheta);
double tanCapTheta = tan(capTheta);
final curvePoints = <double>[];
for (int i = 0; i < m; i++) {
List<int> series = dataToPlot[i].series;
int n = series.length;
final controlPoints = <Point2D>[];
controlPoints.add(Point2D(-1, 0));
double last = 0;
for (int j = 0; j < n; j++) {
double v = series[j].toDouble();
controlPoints.add(Point2D(j.toDouble(), v));
last = v;
}
controlPoints.add(Point2D(n.toDouble(), last));
CatmullInterpolator curve = CatmullInterpolator(controlPoints);
ControlPointAndValue cpv = ControlPointAndValue();
for (int j = 0; j < numPoints; j++) {
cpv.value = MathUtils.map(
j.toDouble(), 0, (numPoints - 1).toDouble(), 0, (n - 1).toDouble());
curve.progressiveGet(cpv);
curvePoints.add(MathUtils.map(
max(0, cpv.value!), 0, maxValues[i].toDouble(), 0, graphHeight));
}
paths.add(Path());
capPaths.add(Path());
paths[i].moveTo(startX, startY);
capPaths[i].moveTo(startX, startY);
for (int j = 0; j < numPoints; j++) {
double v = curvePoints[j];
int k = j + 1;
double xDist = xWidth;
double capV = v;
while (k < numPoints && xDist <= capRangeX) {
double cy = curvePoints[k] + xDist * tanCapTheta;
capV = max(capV, cy);
k++;
xDist += xWidth;
}
double x = MathUtils.map(
j.toDouble(), 0, (numPoints - 1).toDouble(), startX, endX);
double baseY = MathUtils.map(
j.toDouble(), 0, (numPoints - 1).toDouble(), startY, endY);
double y = baseY - v;
double cY = baseY - capV;
paths[i].lineTo(x, y);
if (j == 0) {
int k = capRangeX ~/ xWidth;
double mx = MathUtils.map(
-k.toDouble(), 0, (numPoints - 1).toDouble(), startX, endX);
double my = MathUtils.map(
-k.toDouble(), 0, (numPoints - 1).toDouble(), startY, endY) -
capV;
capPaths[i].lineTo(mx, my);
}
capPaths[i].lineTo(x, cY);
}
paths[i].lineTo(endX, endY);
paths[i].lineTo(endX, endY + 1);
paths[i].lineTo(startX, startY + 1);
paths[i].close();
capPaths[i].lineTo(endX, endY);
capPaths[i].lineTo(endX, endY + 1);
capPaths[i].lineTo(startX, startY + 1);
capPaths[i].close();
}
labelPainter = [];
for (int i = 0; i < dataToPlot.length; i++) {
TextSpan span = TextSpan(
style: const TextStyle(
color: Color.fromARGB(255, 255, 255, 255), fontSize: 12),
text: dataToPlot[i].label.toUpperCase());
TextPainter tp = TextPainter(
text: span,
textAlign: TextAlign.left,
textDirection: TextDirection.ltr);
tp.layout();
labelPainter.add(tp);
}
milestonePainter = [];
for (int i = 0; i < milestones.length; i++) {
TextSpan span = TextSpan(
style: const TextStyle(
color: Color.fromARGB(255, 255, 255, 255), fontSize: 10),
text: milestones[i].label.toUpperCase());
TextPainter tp = TextPainter(
text: span,
textAlign: TextAlign.left,
textDirection: TextDirection.ltr);
tp.layout();
milestonePainter.add(tp);
}
lastSize = Size(size.width, size.height);
}
@override
Widget build(BuildContext context) {
return Container(
color: Constants.backgroundColor,
child: CustomPaint(
foregroundPainter: _ChartPainter(this, widget.dataToPlot,
widget.milestones, 80, 50, 50, 12, 500, widget.animationValue),
child: Container()));
}
}
class _ChartPainter extends CustomPainter {
static List<Color?> colors = [
Colors.red[900],
const Color(0xffc4721a),
Colors.lime[900],
Colors.green[900],
Colors.blue[900],
Colors.purple[900],
];
static List<Color?> capColors = [
Colors.red[500],
Colors.amber[500],
Colors.lime[500],
Colors.green[500],
Colors.blue[500],
Colors.purple[500],
];
List<DataSeries> dataToPlot;
List<WeekLabel> milestones;
double margin;
double graphGap;
late double capTheta;
double capSize;
int numPoints;
double amount = 1.0;
late Paint pathPaint;
late Paint capPaint;
late Paint textPaint;
late Paint milestonePaint;
late Paint linePaint;
late Paint fillPaint;
_LayeredChartState state;
_ChartPainter(
this.state,
this.dataToPlot,
this.milestones,
this.margin,
this.graphGap,
double capDegrees,
this.capSize,
this.numPoints,
this.amount) {
capTheta = pi * capDegrees / 180;
pathPaint = Paint();
pathPaint.style = PaintingStyle.fill;
capPaint = Paint();
capPaint.style = PaintingStyle.fill;
textPaint = Paint();
textPaint.color = const Color(0xFFFFFFFF);
milestonePaint = Paint();
milestonePaint.color = Constants.milestoneColor;
milestonePaint.style = PaintingStyle.stroke;
milestonePaint.strokeWidth = 2;
linePaint = Paint();
linePaint.style = PaintingStyle.stroke;
linePaint.strokeWidth = 0.5;
fillPaint = Paint();
fillPaint.style = PaintingStyle.fill;
fillPaint.color = const Color(0xFF000000);
}
@override
void paint(Canvas canvas, Size size) {
if (dataToPlot.isEmpty) {
return;
}
if (state.lastSize == null ||
size.width != state.lastSize!.width ||
size.height != state.lastSize!.height) {
print('Building paths, lastsize = ${state.lastSize}');
state.buildPaths(size, dataToPlot, milestones, numPoints, graphGap,
margin, capTheta, capSize);
}
int m = dataToPlot.length;
int numWeeks = dataToPlot[0].series.length;
// How far along to draw
double totalGap = m * graphGap;
double xIndent = totalGap / tan(capTheta);
double dx = xIndent / (m - 1);
double startX = margin + xIndent;
double endX = size.width - margin;
double startY = size.height;
double endY = startY - (endX - startX) * tan(state.theta);
// MILESTONES
{
for (int i = 0; i < milestones.length; i++) {
WeekLabel milestone = milestones[i];
double p = (milestone.weekNum!.toDouble() / numWeeks) + (1 - amount);
if (p < 1) {
double x1 = MathUtils.map(p, 0, 1, startX, endX);
double y1 = MathUtils.map(p, 0, 1, startY, endY);
double x2 = x1 - xIndent;
double y2 = y1 - graphGap * (m - 1);
x1 += dx * 0.5;
y1 += graphGap * 0.5;
double textY = y1 + 5;
double textX = x1 + 5 * tan(capTheta);
canvas.drawLine(Offset(x1, y1), Offset(x2, y2), milestonePaint);
canvas.save();
TextPainter tp = state.milestonePainter[i];
canvas.translate(textX, textY);
canvas.skew(tan(capTheta * 1.0), -tan(state.theta));
canvas.translate(-tp.width / 2, 0);
tp.paint(canvas, const Offset(0, 0));
canvas.restore();
}
}
}
for (int i = m - 1; i >= 0; i--) {
canvas.save();
canvas.translate(-dx * i, -graphGap * i);
{
// TEXT LABELS
canvas.save();
double textPosition = 0.2;
double textX = MathUtils.map(textPosition, 0, 1, startX, endX);
double textY = MathUtils.map(textPosition, 0, 1, startY, endY) + 5;
canvas.translate(textX, textY);
TextPainter tp = state.labelPainter[i];
canvas.skew(0, -tan(state.theta));
canvas.drawRect(
Rect.fromLTWH(-1, -1, tp.width + 2, tp.height + 2), fillPaint);
tp.paint(canvas, const Offset(0, 0));
canvas.restore();
}
linePaint.color = capColors[i]!;
canvas.drawLine(Offset(startX, startY), Offset(endX, endY), linePaint);
Path clipPath = Path();
clipPath.moveTo(startX - capSize, startY + 11);
clipPath.lineTo(endX, endY + 1);
clipPath.lineTo(endX, endY - state.graphHeight - capSize);
clipPath.lineTo(startX - capSize, startY - state.graphHeight - capSize);
clipPath.close();
canvas.clipPath(clipPath);
pathPaint.color = colors[i]!;
capPaint.color = capColors[i]!;
double offsetX = MathUtils.map(1 - amount, 0, 1, startX, endX);
double offsetY = MathUtils.map(1 - amount, 0, 1, startY, endY);
canvas.translate(offsetX - startX, offsetY - startY);
canvas.drawPath(state.capPaths[i], capPaint);
canvas.drawPath(state.paths[i], pathPaint);
canvas.restore();
}
}
@override
bool shouldRepaint(CustomPainter oldDelegate) {
return true;
}
}

259
web/github_dataviz/lib/main.dart
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@@ -1,259 +0,0 @@
// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:collection';
import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:flutter/material.dart';
import 'package:github_dataviz/constants.dart';
import 'package:github_dataviz/data/contribution_data.dart';
import 'package:github_dataviz/data/data_series.dart';
import 'package:github_dataviz/data/stat_for_week.dart';
import 'package:github_dataviz/data/user_contribution.dart';
import 'package:github_dataviz/data/week_label.dart';
import 'package:github_dataviz/layered_chart.dart';
import 'package:github_dataviz/mathutils.dart';
import 'package:github_dataviz/timeline.dart';
class MainLayout extends StatefulWidget {
const MainLayout({Key? key}) : super(key: key);
@override
State<MainLayout> createState() => _MainLayoutState();
}
class _MainLayoutState extends State<MainLayout> with TickerProviderStateMixin {
AnimationController? _animation;
List<UserContribution>? contributions;
List<StatForWeek>? starsByWeek;
List<StatForWeek>? forksByWeek;
List<StatForWeek>? pushesByWeek;
List<StatForWeek>? issueCommentsByWeek;
List<StatForWeek>? pullRequestActivityByWeek;
late List<WeekLabel> weekLabels;
static const double earlyInterpolatorFraction = 0.8;
static final EarlyInterpolator interpolator =
EarlyInterpolator(earlyInterpolatorFraction);
double animationValue = 1.0;
double interpolatedAnimationValue = 1.0;
bool timelineOverride = false;
@override
void initState() {
super.initState();
createAnimation(0);
weekLabels = [];
weekLabels.add(WeekLabel.forDate(DateTime(2019, 2, 26), 'v1.2'));
weekLabels.add(WeekLabel.forDate(DateTime(2018, 12, 4), 'v1.0'));
// weekLabels.add(WeekLabel.forDate(new DateTime(2018, 9, 19), "Preview 2"));
weekLabels.add(WeekLabel.forDate(DateTime(2018, 6, 21), 'Preview 1'));
// weekLabels.add(WeekLabel.forDate(new DateTime(2018, 5, 7), "Beta 3"));
weekLabels.add(WeekLabel.forDate(DateTime(2018, 2, 27), 'Beta 1'));
weekLabels.add(WeekLabel.forDate(DateTime(2017, 5, 1), 'Alpha'));
weekLabels.add(WeekLabel(48, 'Repo Made Public'));
loadGitHubData();
}
void createAnimation(double startValue) {
_animation?.dispose();
_animation = AnimationController(
value: startValue,
duration: const Duration(milliseconds: 14400),
vsync: this,
)..repeat();
_animation!.addListener(() {
setState(() {
if (!timelineOverride) {
animationValue = _animation!.value;
interpolatedAnimationValue = interpolator.get(animationValue);
}
});
});
}
@override
Widget build(BuildContext context) {
// Combined contributions data
List<DataSeries> dataToPlot = [];
if (contributions != null) {
List<int> series = [];
for (UserContribution userContrib in contributions!) {
for (int i = 0; i < userContrib.contributions.length; i++) {
ContributionData data = userContrib.contributions[i];
if (series.length > i) {
series[i] = series[i] + data.add;
} else {
series.add(data.add);
}
}
}
dataToPlot.add(DataSeries('Added Lines', series));
}
if (starsByWeek != null) {
dataToPlot
.add(DataSeries('Stars', starsByWeek!.map((e) => e.stat).toList()));
}
if (forksByWeek != null) {
dataToPlot
.add(DataSeries('Forks', forksByWeek!.map((e) => e.stat).toList()));
}
if (pushesByWeek != null) {
dataToPlot
.add(DataSeries('Pushes', pushesByWeek!.map((e) => e.stat).toList()));
}
if (issueCommentsByWeek != null) {
dataToPlot.add(DataSeries(
'Issue Comments', issueCommentsByWeek!.map((e) => e.stat).toList()));
}
if (pullRequestActivityByWeek != null) {
dataToPlot.add(DataSeries('Pull Request Activity',
pullRequestActivityByWeek!.map((e) => e.stat).toList()));
}
LayeredChart layeredChart =
LayeredChart(dataToPlot, weekLabels, interpolatedAnimationValue);
const double timelinePadding = 60.0;
var timeline = Timeline(
numWeeks: dataToPlot.isNotEmpty ? dataToPlot.last.series.length : 0,
animationValue: interpolatedAnimationValue,
weekLabels: weekLabels,
mouseDownCallback: (double xFraction) {
setState(() {
timelineOverride = true;
_animation?.stop();
interpolatedAnimationValue = xFraction;
});
},
mouseMoveCallback: (double xFraction) {
setState(() {
interpolatedAnimationValue = xFraction;
});
},
mouseUpCallback: () {
setState(() {
timelineOverride = false;
createAnimation(
interpolatedAnimationValue * earlyInterpolatorFraction);
});
},
);
Column mainColumn = Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: [
Expanded(child: layeredChart),
Padding(
padding: const EdgeInsets.only(
left: timelinePadding,
right: timelinePadding,
bottom: timelinePadding),
child: timeline,
),
],
);
return Container(
color: Constants.backgroundColor,
child:
Directionality(textDirection: TextDirection.ltr, child: mainColumn),
);
}
@override
void dispose() {
_animation?.dispose();
super.dispose();
}
Future loadGitHubData() async {
String contributorsJsonStr =
(await http.get(Uri.parse('assets/github_data/contributors.json')))
.body;
List jsonObjs = jsonDecode(contributorsJsonStr) as List;
List<UserContribution> contributionList =
jsonObjs.map((e) => UserContribution.fromJson(e)).toList();
print(
'Loaded ${contributionList.length} code contributions to /flutter/flutter repo.');
int numWeeksTotal = contributionList[0].contributions.length;
String starsByWeekStr =
(await http.get(Uri.parse('assets/github_data/stars.tsv'))).body;
List<StatForWeek> starsByWeekLoaded =
summarizeWeeksFromTSV(starsByWeekStr, numWeeksTotal);
String forksByWeekStr =
(await http.get(Uri.parse('assets/github_data/forks.tsv'))).body;
List<StatForWeek> forksByWeekLoaded =
summarizeWeeksFromTSV(forksByWeekStr, numWeeksTotal);
String commitsByWeekStr =
(await http.get(Uri.parse('assets/github_data/commits.tsv'))).body;
List<StatForWeek> commitsByWeekLoaded =
summarizeWeeksFromTSV(commitsByWeekStr, numWeeksTotal);
String commentsByWeekStr =
(await http.get(Uri.parse('assets/github_data/comments.tsv'))).body;
List<StatForWeek> commentsByWeekLoaded =
summarizeWeeksFromTSV(commentsByWeekStr, numWeeksTotal);
String pullRequestActivityByWeekStr =
(await http.get(Uri.parse('assets/github_data/pull_requests.tsv')))
.body;
List<StatForWeek> pullRequestActivityByWeekLoaded =
summarizeWeeksFromTSV(pullRequestActivityByWeekStr, numWeeksTotal);
setState(() {
contributions = contributionList;
starsByWeek = starsByWeekLoaded;
forksByWeek = forksByWeekLoaded;
pushesByWeek = commitsByWeekLoaded;
issueCommentsByWeek = commentsByWeekLoaded;
pullRequestActivityByWeek = pullRequestActivityByWeekLoaded;
});
}
List<StatForWeek> summarizeWeeksFromTSV(
String statByWeekStr, int numWeeksTotal) {
List<StatForWeek> loadedStats = [];
HashMap<int, StatForWeek> statMap = HashMap();
statByWeekStr.split('\n').forEach((s) {
List<String> split = s.split('\t');
if (split.length == 2) {
int weekNum = int.parse(split[0]);
statMap[weekNum] = StatForWeek(weekNum, int.parse(split[1]));
}
});
print('Loaded ${statMap.length} weeks.');
// Convert into a list by week, but fill in empty weeks with 0
for (int i = 0; i < numWeeksTotal; i++) {
StatForWeek? starsForWeek = statMap[i];
if (starsForWeek == null) {
loadedStats.add(StatForWeek(i, 0));
} else {
loadedStats.add(starsForWeek);
}
}
return loadedStats;
}
}
void main() {
runApp(const Center(child: MainLayout()));
}

48
web/github_dataviz/lib/mathutils.dart
View File

@@ -1,48 +0,0 @@
abstract class Interpolator {
double get(double x);
}
class EarlyInterpolator implements Interpolator {
double amount;
EarlyInterpolator(this.amount);
@override
double get(double x) {
if (x >= amount) {
return 1;
} else {
return MathUtils.map(x, 0, amount, 0, 1);
}
}
}
class Point2D {
double x, y;
Point2D(this.x, this.y);
}
class MathUtils {
static double map(double x, double a, double b, double u, double v) {
double p = (x - a) / (b - a);
return u + p * (v - u);
}
static double clampedMap(double x, double a, double b, double u, double v) {
if (x <= a) {
return u;
} else if (x >= b) {
return v;
} else {
double p = (x - a) / (b - a);
return u + p * (v - u);
}
}
static double clamp(double x, double a, double b) {
if (x < a) return a;
if (x > b) return b;
return x;
}
}

227
web/github_dataviz/lib/timeline.dart
View File

@@ -1,227 +0,0 @@
import 'dart:collection';
import 'package:flutter/material.dart';
import 'package:github_dataviz/constants.dart';
import 'package:github_dataviz/data/week_label.dart';
import 'package:github_dataviz/mathutils.dart';
typedef MouseDownCallback = void Function(double xFraction);
typedef MouseMoveCallback = void Function(double xFraction);
typedef MouseUpCallback = void Function();
class Timeline extends StatefulWidget {
final int numWeeks;
final double animationValue;
final List<WeekLabel> weekLabels;
final MouseDownCallback? mouseDownCallback;
final MouseMoveCallback? mouseMoveCallback;
final MouseUpCallback? mouseUpCallback;
const Timeline(
{required this.numWeeks,
required this.animationValue,
required this.weekLabels,
this.mouseDownCallback,
this.mouseMoveCallback,
this.mouseUpCallback,
Key? key})
: super(key: key);
@override
State<Timeline> createState() {
return _TimelineState();
}
}
class _TimelineState extends State<Timeline> {
HashMap<String, TextPainter> labelPainters = HashMap();
@override
void initState() {
super.initState();
for (int year = 2015; year < 2020; year++) {
String yearLabel = '$year';
labelPainters[yearLabel] =
_makeTextPainter(Constants.timelineLineColor, yearLabel);
}
for (var weekLabel in widget.weekLabels) {
labelPainters[weekLabel.label] =
_makeTextPainter(Constants.milestoneTimelineColor, weekLabel.label);
labelPainters['${weekLabel.label}_red'] =
_makeTextPainter(Colors.redAccent, weekLabel.label);
}
}
@override
Widget build(BuildContext context) {
return GestureDetector(
behavior: HitTestBehavior.translucent,
onHorizontalDragDown: (DragDownDetails details) {
final mouseDownCallback = widget.mouseDownCallback;
if (mouseDownCallback != null) {
mouseDownCallback(
_getClampedXFractionLocalCoords(context, details.globalPosition));
}
},
onHorizontalDragEnd: (DragEndDetails details) {
final mouseUpCallback = widget.mouseUpCallback;
if (mouseUpCallback != null) {
mouseUpCallback();
}
},
onHorizontalDragUpdate: (DragUpdateDetails details) {
final mouseMoveCallback = widget.mouseMoveCallback;
if (mouseMoveCallback != null) {
mouseMoveCallback(
_getClampedXFractionLocalCoords(context, details.globalPosition));
}
},
child: CustomPaint(
foregroundPainter: _TimelinePainter(
this, widget.numWeeks, widget.animationValue, widget.weekLabels),
child: Container(
height: 200,
)),
);
}
TextPainter _makeTextPainter(Color color, String label) {
TextSpan span =
TextSpan(style: TextStyle(color: color, fontSize: 12), text: label);
TextPainter tp = TextPainter(
text: span,
textAlign: TextAlign.left,
textDirection: TextDirection.ltr);
tp.layout();
return tp;
}
double _getClampedXFractionLocalCoords(
BuildContext context, Offset globalOffset) {
final RenderBox box = context.findRenderObject() as RenderBox;
final Offset localOffset = box.globalToLocal(globalOffset);
return MathUtils.clamp(localOffset.dx / context.size!.width, 0, 1);
}
}
class _TimelinePainter extends CustomPainter {
_TimelineState state;
late Paint mainLinePaint;
late Paint milestoneLinePaint;
Color lineColor = Colors.white;
int numWeeks;
double animationValue;
int weekYearOffset =
9; // Week 0 in our data is 9 weeks before the year boundary (i.e. week 43)
List<WeekLabel> weekLabels;
int yearNumber = 2015;
_TimelinePainter(
this.state, this.numWeeks, this.animationValue, this.weekLabels) {
mainLinePaint = Paint();
mainLinePaint.style = PaintingStyle.stroke;
mainLinePaint.color = Constants.timelineLineColor;
milestoneLinePaint = Paint();
milestoneLinePaint.style = PaintingStyle.stroke;
milestoneLinePaint.color = Constants.milestoneTimelineColor;
}
@override
void paint(Canvas canvas, Size size) {
double labelHeight = 20;
double labelHeightDoubled = labelHeight * 2;
double mainLineY = size.height / 2;
canvas.drawLine(
Offset(0, mainLineY), Offset(size.width, mainLineY), mainLinePaint);
double currTimeX = size.width * animationValue;
canvas.drawLine(
Offset(currTimeX, labelHeightDoubled),
Offset(currTimeX, size.height - labelHeightDoubled),
milestoneLinePaint);
{
for (int week = 0; week < numWeeks; week++) {
double lineHeight = size.height / 32;
bool isYear = false;
if ((week - 9) % 52 == 0) {
// Year
isYear = true;
lineHeight = size.height / 2;
} else if ((week - 1) % 4 == 0) {
// Month
lineHeight = size.height / 8;
}
double currX = (week / numWeeks.toDouble()) * size.width;
if (lineHeight > 0) {
double margin = (size.height - lineHeight) / 2;
double currTimeXDiff = (currTimeX - currX) / size.width;
if (currTimeXDiff > 0) {
var mappedValue =
MathUtils.clampedMap(currTimeXDiff, 0, 0.025, 0, 1);
var lerpedColor = Color.lerp(Constants.milestoneTimelineColor,
Constants.timelineLineColor, mappedValue)!;
mainLinePaint.color = lerpedColor;
} else {
mainLinePaint.color = Constants.timelineLineColor;
}
canvas.drawLine(Offset(currX, margin),
Offset(currX, size.height - margin), mainLinePaint);
}
if (isYear) {
var yearLabel = '$yearNumber';
state.labelPainters[yearLabel]!
.paint(canvas, Offset(currX, size.height - labelHeight));
yearNumber++;
}
}
}
{
for (int i = 0; i < weekLabels.length; i++) {
WeekLabel weekLabel = weekLabels[i];
double currX = (weekLabel.weekNum! / numWeeks.toDouble()) * size.width;
var timelineXDiff = (currTimeX - currX) / size.width;
double maxTimelineDiff = 0.08;
TextPainter textPainter = state.labelPainters[weekLabel.label]!;
if (timelineXDiff > 0 &&
timelineXDiff < maxTimelineDiff &&
animationValue < 1) {
var mappedValue =
MathUtils.clampedMap(timelineXDiff, 0, maxTimelineDiff, 0, 1);
var lerpedColor = Color.lerp(
Colors.redAccent, Constants.milestoneTimelineColor, mappedValue)!;
milestoneLinePaint.strokeWidth =
MathUtils.clampedMap(timelineXDiff, 0, maxTimelineDiff, 6, 1);
milestoneLinePaint.color = lerpedColor;
} else {
milestoneLinePaint.strokeWidth = 1;
milestoneLinePaint.color = Constants.milestoneTimelineColor;
}
double lineHeight = size.height / 2;
double margin = (size.height - lineHeight) / 2;
canvas.drawLine(Offset(currX, margin),
Offset(currX, size.height - margin), milestoneLinePaint);
textPainter.paint(
canvas, Offset(currX, size.height - labelHeightDoubled));
}
}
}
@override
bool shouldRepaint(CustomPainter oldDelegate) {
return true;
}
}

18
web/github_dataviz/pubspec.yaml
View File

@@ -1,18 +0,0 @@
name: github_dataviz
environment:
sdk: ">=2.17.0-0 <3.0.0"
dependencies:
flutter:
sdk: flutter
intl: ^0.17.0
http: ^0.13.4
dev_dependencies:
flutter_lints: ^2.0.1
flutter:
assets:
- preview.png
- github_data/

11
web/github_dataviz/web/index.html
View File

@@ -1,11 +0,0 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
<script defer src="main.dart.js" type="application/javascript"></script>
</head>
<body>
</body>
</html>

17
web/samples_index/lib/src/samples.yaml
View File

@@ -617,23 +617,6 @@ samples:
type: demo type: demo
web: web/game_template web: web/game_template
- name: GitHub Dataviz
author: Larva Labs
screenshots:
- url: images/github_dataviz1.png
alt: GitHub Dataviz screenshot
source: https://github.com/flutter/samples/tree/main/web/github_dataviz
description: >
A visualization for Flutter repository data
difficulty: intermediate
widgets: []
packages: []
platforms: ['web']
links: []
tags: ['demo', 'data', 'visualization']
web: web/github_dataviz
type: demo
- name: Dice - name: Dice
author: Jaime Blasco author: Jaime Blasco
screenshots: screenshots: