[ { "path": ".github/workflows/publish.yml", "content": "name: Publish\n\non:\n release:\n types: [ published ]\n workflow_dispatch:\n\njobs:\n publish:\n runs-on: ubuntu-latest\n steps:\n - name: Checkout repo\n uses: actions/checkout@v4\n - name: Publish\n uses: k-paxian/dart-package-publisher@master\n with:\n credentialJson: ${{ secrets.CREDENTIAL_JSON }}\n flutter: true\n skipTests: true\n" }, { "path": ".github/workflows/publishable.yml", "content": "name: Publishable\n\non:\n push:\n branches:\n - main\n - master\n pull_request:\n branches:\n - main\n - master\n paths:\n - \"**.md\"\n - \"**.yaml\"\n - \"**.yml\"\n\njobs:\n publish-dry-run:\n name: Publish dry-run with packages\n runs-on: ubuntu-latest\n steps:\n - uses: actions/checkout@v4\n - uses: k-paxian/dart-package-publisher@master\n with:\n credentialJson: 'MockCredentialJson'\n flutter: true\n dryRunOnly: true\n skipTests: true\n" }, { "path": ".github/workflows/runnable.yml", "content": "name: Runnable (stable)\n\non:\n push:\n branches:\n - main\n - master\n paths-ignore:\n - \"**.md\"\n pull_request:\n branches:\n - main\n - master\n paths-ignore:\n - \"**.md\"\n\njobs:\n run:\n name: Analyze on ${{ matrix.os }}\n runs-on: ${{ matrix.os }}\n strategy:\n matrix:\n os: [ macos-latest ]\n steps:\n - uses: actions/checkout@v4\n - uses: subosito/flutter-action@v2\n with:\n channel: 'stable'\n - name: Log Dart/Flutter versions\n run: |\n dart --version\n flutter --version\n - name: Prepare dependencies\n run: flutter pub get\n - name: Check Dart code formatting\n run: dart format lib -o none --set-exit-if-changed\n - name: Analyze Dart code\n run: flutter analyze lib\n - run: flutter pub get\n - name: Build Example (Web)\n run: cd example; flutter build web\n" }, { "path": ".gitignore", "content": "# Miscellaneous\n*.class\n*.log\n*.pyc\n*.swp\n.DS_Store\n.atom/\n.buildlog/\n.history\n.svn/\n\n# IntelliJ related\n*.iml\n*.ipr\n*.iws\n.idea/\n\n# The .vscode folder contains launch configuration and tasks you configure in\n# VS Code which you may wish to be included in version control, so this line\n# is commented out by default.\n#.vscode/\n\n# Flutter/Dart/Pub related\n**/doc/api/\n.dart_tool/\n.flutter-plugins\n.flutter-plugins-dependencies\n.packages\n.pub-cache/\n.pub/\nbuild/\npubspec.lock\n\n# Android related\n**/android/**/gradle-wrapper.jar\n**/android/.gradle\n**/android/captures/\n**/android/gradlew\n**/android/gradlew.bat\n**/android/local.properties\n**/android/**/GeneratedPluginRegistrant.java\n\n# iOS/XCode related\n**/ios/**/*.mode1v3\n**/ios/**/*.mode2v3\n**/ios/**/*.moved-aside\n**/ios/**/*.pbxuser\n**/ios/**/*.perspectivev3\n**/ios/**/*sync/\n**/ios/**/.sconsign.dblite\n**/ios/**/.tags*\n**/ios/**/.vagrant/\n**/ios/**/DerivedData/\n**/ios/**/Icon?\n**/ios/**/Pods/\n**/ios/**/.symlinks/\n**/ios/**/profile\n**/ios/**/xcuserdata\n**/ios/.generated/\n**/ios/Flutter/App.framework\n**/ios/Flutter/Flutter.framework\n**/ios/Flutter/Flutter.podspec\n**/ios/Flutter/Generated.xcconfig\n**/ios/Flutter/ephemeral\n**/ios/Flutter/app.flx\n**/ios/Flutter/app.zip\n**/ios/Flutter/flutter_assets/\n**/ios/Flutter/flutter_export_environment.sh\n**/ios/ServiceDefinitions.json\n**/ios/Runner/GeneratedPluginRegistrant.*\n\n# Exceptions to above rules.\n!**/ios/**/default.mode1v3\n!**/ios/**/default.mode2v3\n!**/ios/**/default.pbxuser\n!**/ios/**/default.perspectivev3\n" }, { "path": ".metadata", "content": "# This file tracks properties of this Flutter project.\n# Used by Flutter tool to assess capabilities and perform upgrades etc.\n#\n# This file should be version controlled and should not be manually edited.\n\nversion:\n revision: 02c026b03cd31dd3f867e5faeb7e104cce174c5f\n channel: stable\n\nproject_type: package\n" }, { "path": "CHANGELOG.md", "content": "## 0.3.6\n\n* Update dependency: intl to ^0.20.0.\n\n## 0.3.5\n\n* Update dependency: intl to ^0.19.0.\n\n## 0.3.4\n\n* Fix a potential crash if volume numbers are null.\n\n## 0.3.3\n\n* Fix an issue where `onTap` event was not firing. [(Issue #8)](https://github.com/fluttercandies/flutter-interactive-chart/issues/8)\n\n## 0.3.2\n\n* Add `initialVisibleCandleCount` parameter for setting a default zoom level. [(Issue #6)](https://github.com/fluttercandies/flutter-interactive-chart/issues/6)\n\n## 0.3.1\n\n* Allow web and desktop users to zoom the chart with mouse scroll wheel. [(Issue #4)](https://github.com/fluttercandies/flutter-interactive-chart/issues/4)\n\n## 0.3.0\n\n* BREAKING: Add support for multiple trend lines. [(Issue #2)](https://github.com/fluttercandies/flutter-interactive-chart/issues/2)\n* The old `trend` property is changed to `trends`, to support multiple data points per `CandleData`.\n* The old `trendLineColor` property is changed to `trendLineStyles`.\n* The `CandleData.computeMA` helper function no longer modifies data in-place. To migrate,\n change `CandleData.computeMA(data)` to the following two lines:\n `final ma = CandleData.computeMA(data); ` and\n `for (int i = 0; i < data.length; i++) { data[i].trends = [ma[i]]; }`.\n* Update example project to reflect above changes.\n\n## 0.2.1\n\n* Add `onTap` event and `onCandleResize` event.\n* Allow `overlayInfo` to return an empty object.\n* Update example project.\n\n## 0.2.0\n\n* BREAKING: Organize folder structures, now you only need to\n import `package:interactive_chart/interactive_chart.dart`.\n* BREAKING: Change CandleData `timestamp` to milliseconds, you might need to multiply your data by\n 1000 when creating CandleData objects.\n* Fix an issue where zooming was occasionally not smooth.\n* Fix an issue where overlay panel was occasionally clipped.\n\n## 0.1.1\n\n* Improve performance.\n* Allow `high` and `low` prices to be optional.\n* Align date/time labels towards vertical bottom.\n\n## 0.1.0\n\n* Initial Open Source release.\n" }, { "path": "CODEOWNERS", "content": "* @h65wang\n" }, { "path": "LICENSE", "content": "MIT License\n\nCopyright (c) 2021 h65wang\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n" }, { "path": "README.md", "content": "# interactive_chart\n\nA candlestick chart that supports pinch-to-zoom and panning.\n\n## Dark mode\n\n![pan](https://raw.githubusercontent.com/fluttercandies/flutter-interactive-chart/master/example/demo_gifs/dark.gif)\n\n## Pan\n\n![pan](https://raw.githubusercontent.com/fluttercandies/flutter-interactive-chart/master/example/demo_gifs/pan.gif)\n\n\n## Pinch-to-zoom\n\n![zoom](https://raw.githubusercontent.com/fluttercandies/flutter-interactive-chart/master/example/demo_gifs/zoom.gif)\n\n\n## Overlay\n\n![overlay](https://raw.githubusercontent.com/fluttercandies/flutter-interactive-chart/master/example/demo_gifs/overlay.gif)\n\n## Customize styles\n\n![style](https://raw.githubusercontent.com/fluttercandies/flutter-interactive-chart/master/example/demo_gifs/style.gif)" }, { "path": "example/.gitignore", "content": "# Miscellaneous\n*.class\n*.log\n*.pyc\n*.swp\n.DS_Store\n.atom/\n.buildlog/\n.history\n.svn/\n\n# IntelliJ related\n*.iml\n*.ipr\n*.iws\n.idea/\n\n# The .vscode folder contains launch configuration and tasks you configure in\n# VS Code which you may wish to be included in version control, so this line\n# is commented out by default.\n#.vscode/\n\n# Flutter/Dart/Pub related\n**/doc/api/\n**/ios/Flutter/.last_build_id\n.dart_tool/\n.flutter-plugins\n.flutter-plugins-dependencies\n.packages\n.pub-cache/\n.pub/\n/build/\npubspec.lock\n\n# Web related\nlib/generated_plugin_registrant.dart\n\n# Symbolication related\napp.*.symbols\n\n# Obfuscation related\napp.*.map.json\n\n# Android Studio will place build artifacts here\n/android/app/debug\n/android/app/profile\n/android/app/release\n" }, { "path": "example/.metadata", "content": "# This file tracks properties of this Flutter project.\n# Used by Flutter tool to assess capabilities and perform upgrades etc.\n#\n# This file should be version controlled and should not be manually edited.\n\nversion:\n revision: \"8defaa71a77c16e8547abdbfad2053ce3a6e2d5b\"\n channel: \"stable\"\n\nproject_type: app\n\n# Tracks metadata for the flutter migrate command\nmigration:\n platforms:\n - platform: root\n create_revision: 8defaa71a77c16e8547abdbfad2053ce3a6e2d5b\n base_revision: 8defaa71a77c16e8547abdbfad2053ce3a6e2d5b\n - platform: web\n create_revision: 8defaa71a77c16e8547abdbfad2053ce3a6e2d5b\n base_revision: 8defaa71a77c16e8547abdbfad2053ce3a6e2d5b\n\n # User provided section\n\n # List of Local paths (relative to this file) that should be\n # ignored by the migrate tool.\n #\n # Files that are not part of the templates will be ignored by default.\n unmanaged_files:\n - 'lib/main.dart'\n - 'ios/Runner.xcodeproj/project.pbxproj'\n" }, { "path": "example/README.md", "content": "# example\n\nA new Flutter project.\n\n## Getting Started\n\nThis project is a starting point for a Flutter application.\n\nA few resources to get you started if this is your first Flutter project:\n\n- [Lab: Write your first Flutter app](https://flutter.dev/docs/get-started/codelab)\n- [Cookbook: Useful Flutter samples](https://flutter.dev/docs/cookbook)\n\nFor help getting started with Flutter, view our\n[online documentation](https://flutter.dev/docs), which offers tutorials,\nsamples, guidance on mobile development, and a full API reference.\n" }, { "path": "example/analysis_options.yaml", "content": "# This file configures the analyzer, which statically analyzes Dart code to\n# check for errors, warnings, and lints.\n#\n# The issues identified by the analyzer are surfaced in the UI of Dart-enabled\n# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be\n# invoked from the command line by running `flutter analyze`.\n\n# The following line activates a set of recommended lints for Flutter apps,\n# packages, and plugins designed to encourage good coding practices.\ninclude: package:flutter_lints/flutter.yaml\n\nlinter:\n # The lint rules applied to this project can be customized in the\n # section below to disable rules from the `package:flutter_lints/flutter.yaml`\n # included above or to enable additional rules. A list of all available lints\n # and their documentation is published at https://dart.dev/lints.\n #\n # Instead of disabling a lint rule for the entire project in the\n # section below, it can also be suppressed for a single line of code\n # or a specific dart file by using the `// ignore: name_of_lint` and\n # `// ignore_for_file: name_of_lint` syntax on the line or in the file\n # producing the lint.\n rules:\n # avoid_print: false # Uncomment to disable the `avoid_print` rule\n # prefer_single_quotes: true # Uncomment to enable the `prefer_single_quotes` rule\n\n# Additional information about this file can be found at\n# https://dart.dev/guides/language/analysis-options\n" }, { "path": "example/lib/main.dart", "content": "import 'package:flutter/material.dart';\nimport 'package:interactive_chart/interactive_chart.dart';\n\nimport 'mock_data.dart';\n\nvoid main() {\n runApp(const MyApp());\n}\n\nclass MyApp extends StatefulWidget {\n const MyApp({Key? key}) : super(key: key);\n\n @override\n State createState() => _MyAppState();\n}\n\nclass _MyAppState extends State {\n final List _data = MockDataTesla.candles;\n bool _darkMode = true;\n bool _showAverage = false;\n\n @override\n Widget build(BuildContext context) {\n return MaterialApp(\n debugShowCheckedModeBanner: false,\n theme: ThemeData(\n brightness: _darkMode ? Brightness.dark : Brightness.light,\n ),\n home: Scaffold(\n appBar: AppBar(\n title: const Text(\"Interactive Chart Demo\"),\n actions: [\n IconButton(\n icon: Icon(_darkMode ? Icons.dark_mode : Icons.light_mode),\n onPressed: () => setState(() => _darkMode = !_darkMode),\n ),\n IconButton(\n icon: Icon(\n _showAverage ? Icons.show_chart : Icons.bar_chart_outlined,\n ),\n onPressed: () {\n setState(() => _showAverage = !_showAverage);\n if (_showAverage) {\n _computeTrendLines();\n } else {\n _removeTrendLines();\n }\n },\n ),\n ],\n ),\n body: SafeArea(\n minimum: const EdgeInsets.all(24.0),\n child: InteractiveChart(\n /** Only [candles] is required */\n candles: _data,\n /** Uncomment the following for examples on optional parameters */\n\n /** Example styling */\n // style: ChartStyle(\n // priceGainColor: Colors.teal[200]!,\n // priceLossColor: Colors.blueGrey,\n // volumeColor: Colors.teal.withOpacity(0.8),\n // trendLineStyles: [\n // Paint()\n // ..strokeWidth = 2.0\n // ..strokeCap = StrokeCap.round\n // ..color = Colors.deepOrange,\n // Paint()\n // ..strokeWidth = 4.0\n // ..strokeCap = StrokeCap.round\n // ..color = Colors.orange,\n // ],\n // priceGridLineColor: Colors.blue[200]!,\n // priceLabelStyle: TextStyle(color: Colors.blue[200]),\n // timeLabelStyle: TextStyle(color: Colors.blue[200]),\n // selectionHighlightColor: Colors.red.withOpacity(0.2),\n // overlayBackgroundColor: Colors.red[900]!.withOpacity(0.6),\n // overlayTextStyle: TextStyle(color: Colors.red[100]),\n // timeLabelHeight: 32,\n // volumeHeightFactor: 0.2, // volume area is 20% of total height\n // ),\n /** Customize axis labels */\n // timeLabel: (timestamp, visibleDataCount) => \"📅\",\n // priceLabel: (price) => \"${price.round()} 💎\",\n /** Customize overlay (tap and hold to see it)\n ** Or return an empty object to disable overlay info. */\n // overlayInfo: (candle) => {\n // \"💎\": \"🤚 \",\n // \"Hi\": \"${candle.high?.toStringAsFixed(2)}\",\n // \"Lo\": \"${candle.low?.toStringAsFixed(2)}\",\n // },\n /** Callbacks */\n // onTap: (candle) => print(\"user tapped on $candle\"),\n // onCandleResize: (width) => print(\"each candle is $width wide\"),\n ),\n ),\n ),\n );\n }\n\n void _computeTrendLines() {\n final ma7 = CandleData.computeMA(_data, 7);\n final ma30 = CandleData.computeMA(_data, 30);\n final ma90 = CandleData.computeMA(_data, 90);\n\n for (int i = 0; i < _data.length; i++) {\n _data[i].trends = [ma7[i], ma30[i], ma90[i]];\n }\n }\n\n void _removeTrendLines() {\n for (final data in _data) {\n data.trends = [];\n }\n }\n}\n" }, { "path": "example/lib/mock_data.dart", "content": "import 'package:interactive_chart/interactive_chart.dart';\n\nclass MockDataTesla {\n static const List _rawData = [\n // (Price data for Tesla Inc, taken from Yahoo Finance)\n // timestamp, open, high, low, close, volume\n [1555939800, 53.80, 53.94, 52.50, 52.55, 60735500],\n [1556026200, 52.03, 53.12, 51.15, 52.78, 54719500],\n [1556112600, 52.77, 53.06, 51.60, 51.73, 53637500],\n [1556199000, 51.00, 51.80, 49.21, 49.53, 109247000],\n [1556285400, 49.30, 49.34, 46.23, 47.03, 111803500],\n [1556544600, 47.17, 48.80, 46.43, 48.29, 83572500],\n [1556631000, 48.41, 48.84, 47.40, 47.74, 47323000],\n [1556717400, 47.77, 48.00, 46.30, 46.80, 53522000],\n [1556803800, 49.10, 49.43, 47.54, 48.82, 90796500],\n [1556890200, 48.77, 51.32, 48.70, 51.01, 118534000],\n [1557149400, 50.00, 51.67, 49.70, 51.07, 54169500],\n [1557235800, 51.36, 51.44, 49.02, 49.41, 50657000],\n [1557322200, 49.39, 50.12, 48.84, 48.97, 30882000],\n [1557408600, 48.40, 48.74, 47.39, 48.40, 33557000],\n [1557495000, 47.95, 48.40, 47.20, 47.90, 35041500],\n [1557754200, 46.40, 46.49, 44.90, 45.40, 54174000],\n [1557840600, 45.86, 46.90, 45.60, 46.46, 36262000],\n [1557927000, 45.86, 46.49, 45.05, 46.39, 36480000],\n [1558013400, 45.90, 46.20, 45.30, 45.67, 37416500],\n [1558099800, 44.39, 44.45, 41.78, 42.21, 88933500],\n [1558359000, 40.56, 41.20, 39.05, 41.07, 102631000],\n [1558445400, 39.55, 41.48, 39.21, 41.02, 90019500],\n [1558531800, 39.82, 40.79, 38.36, 38.55, 93426000],\n [1558618200, 38.87, 39.89, 37.24, 39.10, 132735500],\n [1558704600, 39.97, 40.00, 37.75, 38.13, 70683000],\n [1559050200, 38.24, 39.00, 37.57, 37.74, 51564500],\n [1559136600, 37.42, 38.48, 37.01, 37.97, 59843000],\n [1559223000, 37.75, 38.45, 37.40, 37.64, 39632500],\n [1559309400, 37.02, 37.98, 36.82, 37.03, 52033500],\n [1559568600, 37.10, 37.34, 35.40, 35.79, 65322000],\n [1559655000, 36.22, 38.80, 35.92, 38.72, 69037500],\n [1559741400, 39.74, 40.26, 38.37, 39.32, 67554000],\n [1559827800, 40.89, 42.20, 40.36, 41.19, 101211000],\n [1559914200, 41.00, 42.17, 40.70, 40.90, 80017500],\n [1560173400, 42.05, 43.39, 41.80, 42.58, 52925000],\n [1560259800, 43.83, 44.18, 42.70, 43.42, 58267500],\n [1560346200, 44.59, 44.68, 41.80, 41.85, 75987500],\n [1560432600, 42.08, 42.98, 41.50, 42.78, 40841500],\n [1560519000, 42.25, 43.33, 42.08, 42.98, 37167000],\n [1560778200, 43.10, 45.40, 42.85, 45.01, 61584000],\n [1560864600, 45.74, 46.95, 44.51, 44.95, 63579000],\n [1560951000, 45.02, 45.55, 44.21, 45.29, 32875500],\n [1561037400, 44.60, 45.38, 43.27, 43.92, 59317500],\n [1561123800, 43.24, 44.44, 43.10, 44.37, 41010500],\n [1561383000, 44.65, 45.17, 44.20, 44.73, 28754000],\n [1561469400, 44.88, 45.07, 43.90, 43.95, 30910500],\n [1561555800, 44.06, 45.45, 43.62, 43.85, 42536000],\n [1561642200, 43.89, 44.58, 43.47, 44.57, 31698500],\n [1561728600, 44.20, 45.03, 44.16, 44.69, 34257000],\n [1561987800, 46.04, 46.62, 45.26, 45.43, 41067000],\n [1562074200, 45.78, 45.83, 44.44, 44.91, 46295000],\n [1562160600, 47.88, 48.31, 46.90, 46.98, 71005500],\n [1562333400, 46.91, 47.09, 46.16, 46.62, 35328500],\n [1562592600, 46.25, 46.45, 45.73, 46.07, 29402500],\n [1562679000, 45.79, 46.20, 45.46, 46.01, 30954000],\n [1562765400, 46.83, 47.79, 46.63, 47.78, 45728500],\n [1562851800, 47.63, 48.30, 47.16, 47.72, 37572000],\n [1562938200, 47.95, 49.08, 47.94, 49.02, 46002500],\n [1563197400, 49.60, 50.88, 48.97, 50.70, 55000500],\n [1563283800, 49.86, 50.71, 49.59, 50.48, 40745000],\n [1563370200, 51.13, 51.66, 50.67, 50.97, 48823500],\n [1563456600, 51.01, 51.15, 50.38, 50.71, 23793000],\n [1563543000, 51.14, 51.99, 50.92, 51.64, 35242000],\n [1563802200, 51.75, 52.43, 50.84, 51.14, 34212000],\n [1563888600, 51.34, 52.10, 50.90, 52.03, 25115500],\n [1563975000, 51.83, 53.21, 51.63, 52.98, 55364000],\n [1564061400, 46.70, 46.90, 45.11, 45.76, 112091500],\n [1564147800, 45.38, 46.05, 44.45, 45.61, 50138500],\n [1564407000, 45.42, 47.19, 45.21, 47.15, 46366500],\n [1564493400, 46.58, 48.67, 46.44, 48.45, 40545000],\n [1564579800, 48.60, 49.34, 47.33, 48.32, 45891000],\n [1564666200, 48.53, 48.90, 46.35, 46.77, 41297500],\n [1564752600, 46.27, 47.25, 45.85, 46.87, 30682500],\n [1565011800, 45.92, 46.27, 45.16, 45.66, 35141500],\n [1565098200, 46.38, 46.50, 45.15, 46.15, 27821000],\n [1565184600, 45.30, 46.71, 45.16, 46.68, 23882500],\n [1565271000, 46.89, 47.96, 46.53, 47.66, 26371500],\n [1565357400, 47.21, 47.79, 46.76, 47.00, 19491000],\n [1565616600, 46.60, 47.15, 45.75, 45.80, 23319500],\n [1565703000, 45.76, 47.20, 45.51, 47.00, 24240500],\n [1565789400, 46.24, 46.30, 43.34, 43.92, 47813000],\n [1565875800, 44.17, 44.31, 42.31, 43.13, 40798000],\n [1565962200, 43.33, 44.45, 43.20, 43.99, 25492500],\n [1566221400, 44.84, 45.57, 44.34, 45.37, 26548000],\n [1566307800, 45.52, 45.82, 44.91, 45.17, 20626000],\n [1566394200, 44.40, 44.64, 43.52, 44.17, 38971500],\n [1566480600, 44.56, 45.08, 43.64, 44.43, 32795000],\n [1566567000, 43.99, 44.23, 42.20, 42.28, 42693000],\n [1566826200, 42.72, 43.00, 42.31, 43.00, 25259500],\n [1566912600, 43.15, 43.76, 42.41, 42.82, 27081000],\n [1566999000, 42.74, 43.45, 42.46, 43.12, 16127500],\n [1567085400, 43.80, 44.68, 43.60, 44.34, 25897500],\n [1567171800, 45.83, 46.49, 44.84, 45.12, 46603000],\n [1567517400, 44.82, 45.79, 44.63, 45.00, 26770500],\n [1567603800, 45.38, 45.69, 43.84, 44.14, 28805000],\n [1567690200, 44.50, 45.96, 44.17, 45.92, 36976500],\n [1567776600, 45.44, 45.93, 45.03, 45.49, 20947000],\n [1568035800, 46.00, 46.75, 45.85, 46.36, 24013500],\n [1568122200, 46.16, 47.11, 45.79, 47.11, 24418500],\n [1568208600, 47.48, 49.63, 47.20, 49.42, 50214000],\n [1568295000, 49.54, 50.70, 48.88, 49.17, 42906000],\n [1568381400, 49.39, 49.69, 48.97, 49.04, 26565500],\n [1568640600, 49.20, 49.49, 48.23, 48.56, 23640500],\n [1568727000, 48.49, 49.12, 48.07, 48.96, 19327000],\n [1568813400, 49.00, 49.63, 48.47, 48.70, 20851000],\n [1568899800, 49.20, 49.59, 48.97, 49.32, 23979000],\n [1568986200, 49.30, 49.39, 47.63, 48.12, 31765000],\n [1569245400, 48.00, 49.04, 47.84, 48.25, 21701000],\n [1569331800, 48.30, 48.40, 44.52, 44.64, 64457500],\n [1569418200, 44.91, 45.80, 43.67, 45.74, 47135500],\n [1569504600, 46.13, 48.66, 45.48, 48.51, 59422500],\n [1569591000, 48.44, 49.74, 47.75, 48.43, 55582000],\n [1569850200, 48.60, 48.80, 47.22, 48.17, 29399000],\n [1569936600, 48.30, 49.19, 47.83, 48.94, 30813000],\n [1570023000, 48.66, 48.93, 47.89, 48.63, 28157000],\n [1570109400, 46.37, 46.90, 44.86, 46.61, 75422500],\n [1570195800, 46.32, 46.96, 45.61, 46.29, 39975000],\n [1570455000, 45.96, 47.71, 45.71, 47.54, 40321000],\n [1570541400, 47.17, 48.79, 46.90, 48.01, 43391000],\n [1570627800, 48.26, 49.46, 48.13, 48.91, 34472000],\n [1570714200, 49.06, 49.86, 48.32, 48.95, 31416500],\n [1570800600, 49.43, 50.22, 49.36, 49.58, 42377000],\n [1571059800, 49.58, 51.71, 49.43, 51.39, 51025000],\n [1571146200, 51.54, 52.00, 50.82, 51.58, 32164000],\n [1571232600, 51.48, 52.42, 51.38, 51.95, 33420500],\n [1571319000, 52.50, 52.96, 52.03, 52.39, 23846500],\n [1571405400, 52.14, 52.56, 51.02, 51.39, 28749000],\n [1571664600, 51.67, 51.90, 50.04, 50.70, 25101500],\n [1571751000, 50.86, 51.67, 50.17, 51.12, 23004000],\n [1571837400, 50.90, 51.23, 50.27, 50.94, 26305500],\n [1571923800, 59.67, 60.99, 57.84, 59.94, 148604500],\n [1572010200, 59.54, 66.00, 59.22, 65.63, 150030500],\n [1572269400, 65.51, 68.17, 64.52, 65.54, 94351500],\n [1572355800, 64.00, 64.86, 62.95, 63.24, 63421500],\n [1572442200, 62.60, 63.76, 61.99, 63.00, 48209000],\n [1572528600, 62.62, 63.80, 62.60, 62.98, 25335000],\n [1572615000, 63.26, 63.30, 61.96, 62.66, 31919500],\n [1572877800, 62.96, 64.39, 61.85, 63.49, 43935000],\n [1572964200, 63.92, 64.70, 63.22, 63.44, 34717000],\n [1573050600, 63.60, 65.34, 62.90, 65.32, 39704500],\n [1573137000, 65.83, 68.30, 65.60, 67.11, 72336500],\n [1573223400, 66.90, 67.49, 66.50, 67.43, 30346000],\n [1573482600, 68.79, 69.84, 68.40, 69.02, 49933500],\n [1573569000, 69.38, 70.07, 68.81, 69.99, 36797000],\n [1573655400, 71.00, 71.27, 69.04, 69.22, 42100500],\n [1573741800, 69.22, 70.77, 68.58, 69.87, 32324500],\n [1573828200, 70.13, 70.56, 69.67, 70.43, 24045000],\n [1574087400, 70.58, 70.63, 69.22, 70.00, 22002000],\n [1574173800, 70.35, 72.00, 69.56, 71.90, 38624000],\n [1574260200, 72.00, 72.24, 69.91, 70.44, 33625500],\n [1574346600, 70.90, 72.17, 70.80, 70.97, 30550000],\n [1574433000, 68.03, 68.20, 66.00, 66.61, 84353000],\n [1574692200, 68.86, 68.91, 66.89, 67.27, 61697500],\n [1574778600, 67.05, 67.10, 65.42, 65.78, 39737000],\n [1574865000, 66.22, 66.79, 65.71, 66.26, 27778000],\n [1575037800, 66.22, 66.25, 65.50, 65.99, 12328000],\n [1575297000, 65.88, 67.28, 65.74, 66.97, 30372500],\n [1575383400, 66.52, 67.58, 66.44, 67.24, 32868500],\n [1575469800, 67.55, 67.57, 66.57, 66.61, 27665000],\n [1575556200, 66.57, 66.88, 65.45, 66.07, 18623000],\n [1575642600, 67.00, 67.77, 66.95, 67.18, 38062000],\n [1575901800, 67.32, 68.89, 67.02, 67.91, 45115500],\n [1575988200, 67.99, 70.15, 67.86, 69.77, 44141500],\n [1576074600, 70.38, 71.44, 70.22, 70.54, 34489000],\n [1576161000, 70.98, 72.55, 70.65, 71.94, 38819500],\n [1576247400, 72.21, 73.04, 70.93, 71.68, 32854500],\n [1576506600, 72.51, 76.72, 72.50, 76.30, 90871000],\n [1576593000, 75.80, 77.10, 75.18, 75.80, 42484000],\n [1576679400, 76.13, 79.04, 76.12, 78.63, 70605000],\n [1576765800, 79.46, 81.37, 79.30, 80.81, 90535500],\n [1576852200, 82.06, 82.60, 80.04, 81.12, 73763500],\n [1577111400, 82.36, 84.40, 82.00, 83.84, 66598000],\n [1577197800, 83.67, 85.09, 82.54, 85.05, 40273500],\n [1577370600, 85.58, 86.70, 85.27, 86.19, 53169500],\n [1577457000, 87.00, 87.06, 85.22, 86.08, 49728500],\n [1577716200, 85.76, 85.80, 81.85, 82.94, 62932000],\n [1577802600, 81.00, 84.26, 80.42, 83.67, 51428500],\n [1577975400, 84.90, 86.14, 84.34, 86.05, 47660500],\n [1578061800, 88.10, 90.80, 87.38, 88.60, 88892500],\n [1578321000, 88.09, 90.31, 88.00, 90.31, 50665000],\n [1578407400, 92.28, 94.33, 90.67, 93.81, 89410500],\n [1578493800, 94.74, 99.70, 93.65, 98.43, 155721500],\n [1578580200, 99.42, 99.76, 94.57, 96.27, 142202000],\n [1578666600, 96.36, 96.99, 94.74, 95.63, 64797500],\n [1578925800, 98.70, 105.13, 98.40, 104.97, 132588000],\n [1579012200, 108.85, 109.48, 104.98, 107.58, 144981000],\n [1579098600, 105.95, 107.57, 103.36, 103.70, 86844000],\n [1579185000, 98.75, 102.89, 98.43, 102.70, 108683500],\n [1579271400, 101.52, 103.13, 100.63, 102.10, 68145500],\n [1579617000, 106.05, 109.72, 105.68, 109.44, 89017500],\n [1579703400, 114.38, 118.90, 111.82, 113.91, 156845000],\n [1579789800, 112.85, 116.40, 111.12, 114.44, 98255000],\n [1579876200, 114.13, 114.77, 110.85, 112.96, 71768000],\n [1580135400, 108.40, 112.89, 107.86, 111.60, 68040500],\n [1580221800, 113.70, 115.36, 111.62, 113.38, 58942500],\n [1580308200, 115.14, 117.96, 113.49, 116.20, 89007500],\n [1580394600, 126.48, 130.18, 123.60, 128.16, 145028500],\n [1580481000, 128.00, 130.60, 126.50, 130.11, 78596500],\n [1580740200, 134.74, 157.23, 134.70, 156.00, 235325000],\n [1580826600, 176.59, 193.80, 166.78, 177.41, 304694000],\n [1580913000, 164.65, 169.20, 140.82, 146.94, 242119000],\n [1580999400, 139.98, 159.17, 137.40, 149.79, 199404000],\n [1581085800, 146.11, 153.95, 146.00, 149.61, 85317500],\n [1581345000, 160.00, 164.00, 150.48, 154.26, 123446000],\n [1581431400, 153.76, 156.70, 151.60, 154.88, 58487500],\n [1581517800, 155.57, 157.95, 152.67, 153.46, 60112500],\n [1581604200, 148.37, 163.60, 147.00, 160.80, 131446500],\n [1581690600, 157.44, 162.59, 157.10, 160.01, 78468500],\n [1582036200, 168.32, 172.00, 166.47, 171.68, 81908500],\n [1582122600, 184.70, 188.96, 180.20, 183.48, 127115000],\n [1582209000, 182.39, 182.40, 171.99, 179.88, 88174500],\n [1582295400, 181.40, 182.61, 176.09, 180.20, 71574000],\n [1582554600, 167.80, 172.70, 164.44, 166.76, 75961000],\n [1582641000, 169.80, 171.32, 157.40, 159.98, 86452500],\n [1582727400, 156.50, 162.66, 155.22, 155.76, 70427500],\n [1582813800, 146.00, 147.95, 133.80, 135.80, 121386000],\n [1582900200, 125.94, 138.10, 122.30, 133.60, 121114500],\n [1583159400, 142.25, 148.74, 137.33, 148.72, 100975000],\n [1583245800, 161.00, 161.40, 143.22, 149.10, 128920000],\n [1583332200, 152.79, 153.30, 144.95, 149.90, 75245000],\n [1583418600, 144.75, 149.15, 143.61, 144.91, 54263500],\n [1583505000, 138.00, 141.40, 136.85, 140.70, 63314500],\n [1583760600, 121.08, 132.60, 121.00, 121.60, 85368500],\n [1583847000, 131.89, 133.60, 121.60, 129.07, 77972000],\n [1583933400, 128.04, 130.72, 122.60, 126.85, 66612500],\n [1584019800, 116.18, 118.90, 109.25, 112.11, 94545500],\n [1584106200, 119.00, 121.51, 100.40, 109.32, 113201500],\n [1584365400, 93.90, 98.97, 88.43, 89.01, 102447500],\n [1584451800, 88.00, 94.37, 79.20, 86.04, 119973000],\n [1584538200, 77.80, 80.97, 70.10, 72.24, 118931000],\n [1584624600, 74.94, 90.40, 71.69, 85.53, 150977500],\n [1584711000, 87.64, 95.40, 85.16, 85.51, 141427500],\n [1584970200, 86.72, 88.40, 82.10, 86.86, 82272500],\n [1585056600, 95.46, 102.74, 94.80, 101.00, 114476000],\n [1585143000, 109.05, 111.40, 102.22, 107.85, 106113500],\n [1585229400, 109.48, 112.00, 102.45, 105.63, 86903500],\n [1585315800, 101.00, 105.16, 98.81, 102.87, 71887000],\n [1585575000, 102.05, 103.33, 98.25, 100.43, 59990500],\n [1585661400, 100.25, 108.59, 99.40, 104.80, 88857500],\n [1585747800, 100.80, 102.79, 95.02, 96.31, 66766000],\n [1585834200, 96.21, 98.85, 89.28, 90.89, 99292000],\n [1585920600, 101.90, 103.10, 93.68, 96.00, 112810500],\n [1586179800, 102.24, 104.20, 99.59, 103.25, 74509000],\n [1586266200, 109.00, 113.00, 106.47, 109.09, 89599000],\n [1586352600, 110.84, 111.44, 106.67, 109.77, 63280000],\n [1586439000, 112.42, 115.04, 111.42, 114.60, 68250000],\n [1586784600, 118.03, 130.40, 116.11, 130.19, 112377000],\n [1586871000, 139.79, 148.38, 138.49, 141.98, 152882500],\n [1586957400, 148.40, 150.63, 142.00, 145.97, 117885000],\n [1587043800, 143.39, 151.89, 141.34, 149.04, 103289500],\n [1587130200, 154.46, 154.99, 149.53, 150.78, 65641000],\n [1587389400, 146.54, 153.11, 142.44, 149.27, 73733000],\n [1587475800, 146.02, 150.67, 134.76, 137.34, 101045500],\n [1587562200, 140.80, 146.80, 137.74, 146.42, 70827500],\n [1587648600, 145.52, 146.80, 140.63, 141.13, 66183500],\n [1587735000, 142.16, 146.15, 139.64, 145.03, 66060000],\n [1587994200, 147.52, 159.90, 147.00, 159.75, 103407000],\n [1588080600, 159.13, 161.00, 151.34, 153.82, 76110000],\n [1588167000, 158.03, 160.64, 156.63, 160.10, 81080000],\n [1588253400, 171.04, 173.96, 152.70, 156.38, 142359500],\n [1588339800, 151.00, 154.55, 136.61, 140.26, 162659000],\n [1588599000, 140.20, 152.40, 139.60, 152.24, 96185500],\n [1588685400, 157.96, 159.78, 152.44, 153.64, 84958500],\n [1588771800, 155.30, 157.96, 152.22, 156.52, 55616000],\n [1588858200, 155.44, 159.28, 154.47, 156.01, 57638500],\n [1588944600, 158.75, 164.80, 157.40, 163.88, 80432500],\n [1589203800, 158.10, 164.80, 157.00, 162.26, 82598000],\n [1589290200, 165.40, 168.66, 161.60, 161.88, 79534500],\n [1589376600, 164.17, 165.20, 152.66, 158.19, 95327500],\n [1589463000, 156.00, 160.67, 152.80, 160.67, 68411000],\n [1589549400, 158.07, 161.01, 157.31, 159.83, 52592000],\n [1589808600, 165.56, 166.94, 160.78, 162.73, 58329000],\n [1589895000, 163.03, 164.41, 161.22, 161.60, 48182500],\n [1589981400, 164.10, 165.20, 162.36, 163.11, 36546500],\n [1590067800, 163.20, 166.50, 159.20, 165.52, 61273000],\n [1590154200, 164.43, 166.36, 162.40, 163.38, 49937500],\n [1590499800, 166.90, 166.92, 163.14, 163.77, 40448500],\n [1590586200, 164.17, 165.54, 157.00, 164.05, 57747500],\n [1590672600, 162.70, 164.95, 160.34, 161.16, 36278000],\n [1590759000, 161.75, 167.00, 160.84, 167.00, 58822500],\n [1591018200, 171.60, 179.80, 170.82, 179.62, 74697500],\n [1591104600, 178.94, 181.73, 174.20, 176.31, 67828000],\n [1591191000, 177.62, 179.59, 176.02, 176.59, 39747500],\n [1591277400, 177.98, 179.15, 171.69, 172.88, 44438500],\n [1591363800, 175.57, 177.30, 173.24, 177.13, 39059500],\n [1591623000, 183.80, 190.00, 181.83, 189.98, 70873500],\n [1591709400, 188.00, 190.89, 184.79, 188.13, 56941000],\n [1591795800, 198.38, 205.50, 196.50, 205.01, 92817000],\n [1591882200, 198.04, 203.79, 194.40, 194.57, 79582500],\n [1591968600, 196.00, 197.60, 182.52, 187.06, 83817000],\n [1592227800, 183.56, 199.77, 181.70, 198.18, 78486000],\n [1592314200, 202.37, 202.58, 192.48, 196.43, 70255500],\n [1592400600, 197.54, 201.00, 196.51, 198.36, 49454000],\n [1592487000, 200.60, 203.84, 198.89, 200.79, 48759500],\n [1592573400, 202.56, 203.19, 198.27, 200.18, 43398500],\n [1592832600, 199.99, 201.78, 198.00, 198.86, 31812000],\n [1592919000, 199.78, 202.40, 198.80, 200.36, 31826500],\n [1593005400, 198.82, 200.18, 190.63, 192.17, 54798000],\n [1593091800, 190.85, 197.20, 187.43, 197.20, 46272500],\n [1593178200, 198.96, 199.00, 190.97, 191.95, 44274500],\n [1593437400, 193.80, 202.00, 189.70, 201.87, 45132000],\n [1593523800, 201.30, 217.54, 200.75, 215.96, 84592500],\n [1593610200, 216.60, 227.07, 216.10, 223.93, 66634500],\n [1593696600, 244.30, 245.60, 237.12, 241.73, 86250500],\n [1594042200, 255.34, 275.56, 253.21, 274.32, 102849500],\n [1594128600, 281.00, 285.90, 267.34, 277.97, 107448500],\n [1594215000, 281.00, 283.45, 262.27, 273.18, 81556500],\n [1594301400, 279.40, 281.71, 270.26, 278.86, 58588000],\n [1594387800, 279.20, 309.78, 275.20, 308.93, 116688000],\n [1594647000, 331.80, 359.00, 294.22, 299.41, 194927000],\n [1594733400, 311.20, 318.00, 286.20, 303.36, 117090500],\n [1594819800, 308.60, 310.00, 291.40, 309.20, 81839000],\n [1594906200, 295.43, 306.34, 293.20, 300.13, 71504000],\n [1594992600, 302.69, 307.50, 298.00, 300.17, 46650000],\n [1595251800, 303.80, 330.00, 297.60, 328.60, 85607000],\n [1595338200, 327.99, 335.00, 311.60, 313.67, 80536000],\n [1595424600, 319.80, 325.28, 312.40, 318.47, 70805500],\n [1595511000, 335.79, 337.80, 296.15, 302.61, 121642500],\n [1595597400, 283.20, 293.00, 273.31, 283.40, 96983000],\n [1595856600, 287.00, 309.59, 282.60, 307.92, 80243500],\n [1595943000, 300.80, 312.94, 294.88, 295.30, 79043500],\n [1596029400, 300.20, 306.96, 297.40, 299.82, 47134500],\n [1596115800, 297.60, 302.65, 294.20, 297.50, 38105000],\n [1596202200, 303.00, 303.41, 284.20, 286.15, 61041000],\n [1596461400, 289.84, 301.96, 288.88, 297.00, 44046500],\n [1596547800, 299.00, 305.48, 292.40, 297.40, 42075000],\n [1596634200, 298.60, 299.97, 293.66, 297.00, 24739000],\n [1596720600, 298.17, 303.46, 295.45, 297.92, 29961500],\n [1596807000, 299.91, 299.95, 283.00, 290.54, 44482000],\n [1597066200, 289.60, 291.50, 277.17, 283.71, 37611500],\n [1597152600, 279.20, 284.00, 273.00, 274.88, 43129000],\n [1597239000, 294.00, 317.00, 287.00, 310.95, 109147000],\n [1597325400, 322.20, 330.24, 313.45, 324.20, 102126500],\n [1597411800, 333.00, 333.76, 325.33, 330.14, 62888000],\n [1597671000, 335.40, 369.17, 334.57, 367.13, 101211500],\n [1597757400, 379.80, 384.78, 369.02, 377.42, 82372500],\n [1597843800, 373.00, 382.20, 368.24, 375.71, 61026500],\n [1597930200, 372.14, 404.40, 371.41, 400.37, 103059000],\n [1598016600, 408.95, 419.10, 405.01, 410.00, 107448000],\n [1598275800, 425.26, 425.80, 385.50, 402.84, 100318000],\n [1598362200, 394.98, 405.59, 393.60, 404.67, 53294500],\n [1598448600, 412.00, 433.20, 410.73, 430.63, 71197000],\n [1598535000, 436.09, 459.12, 428.50, 447.75, 118465000],\n [1598621400, 459.02, 463.70, 437.30, 442.68, 100406000],\n [1598880600, 444.61, 500.14, 440.11, 498.32, 118374400],\n [1598967000, 502.14, 502.49, 470.51, 475.05, 89841100],\n [1599053400, 478.99, 479.04, 405.12, 447.37, 96176100],\n [1599139800, 407.23, 431.80, 402.00, 407.00, 87596100],\n [1599226200, 402.81, 428.00, 372.02, 418.32, 110321900],\n [1599571800, 356.00, 368.74, 329.88, 330.21, 115465700],\n [1599658200, 356.60, 369.00, 341.51, 366.28, 79465800],\n [1599744600, 386.21, 398.99, 360.56, 371.34, 84930600],\n [1599831000, 381.94, 382.50, 360.50, 372.72, 60717500],\n [1600090200, 380.95, 420.00, 373.30, 419.62, 83020600],\n [1600176600, 436.56, 461.94, 430.70, 449.76, 97298200],\n [1600263000, 439.87, 457.79, 435.31, 441.76, 72279300],\n [1600349400, 415.60, 437.79, 408.00, 423.43, 76779200],\n [1600435800, 447.94, 451.00, 428.80, 442.15, 86406800],\n [1600695000, 453.13, 455.68, 407.07, 449.39, 109476800],\n [1600781400, 429.60, 437.76, 417.60, 424.23, 79580800],\n [1600867800, 405.16, 412.15, 375.88, 380.36, 95074200],\n [1600954200, 363.80, 399.50, 351.30, 387.79, 96561100],\n [1601040600, 393.47, 408.73, 391.30, 407.34, 67208500],\n [1601299800, 424.62, 428.08, 415.55, 421.20, 49719600],\n [1601386200, 416.00, 428.50, 411.60, 419.07, 50219300],\n [1601472600, 421.32, 433.93, 420.47, 429.01, 48145600],\n [1601559000, 440.76, 448.88, 434.42, 448.16, 50741500],\n [1601645400, 421.39, 439.13, 415.00, 415.09, 71430000],\n [1601904600, 423.35, 433.64, 419.33, 425.68, 44722800],\n [1601991000, 423.79, 428.78, 406.05, 413.98, 49146300],\n [1602077400, 419.87, 429.90, 413.85, 425.30, 43127700],\n [1602163800, 438.44, 439.00, 425.30, 425.92, 40421100],\n [1602250200, 430.13, 434.59, 426.46, 434.00, 28925700],\n [1602509400, 442.00, 448.74, 438.58, 442.30, 38791100],\n [1602595800, 443.35, 448.89, 436.60, 446.65, 34463700],\n [1602682200, 449.78, 465.90, 447.35, 461.30, 47879700],\n [1602768600, 450.31, 456.57, 442.50, 448.88, 35672400],\n [1602855000, 454.44, 455.95, 438.85, 439.67, 32775900],\n [1603114200, 446.24, 447.00, 428.87, 430.83, 36287800],\n [1603200600, 431.75, 431.75, 419.05, 421.94, 31656300],\n [1603287000, 422.70, 432.95, 421.25, 422.64, 32370500],\n [1603373400, 441.92, 445.23, 424.51, 425.79, 39993200],\n [1603459800, 421.84, 422.89, 407.38, 420.63, 33717000],\n [1603719000, 411.63, 425.76, 410.00, 420.28, 28239200],\n [1603805400, 423.76, 430.50, 420.10, 424.68, 22686500],\n [1603891800, 416.48, 418.60, 406.00, 406.02, 25451400],\n [1603978200, 409.96, 418.06, 406.46, 410.83, 22655300],\n [1604064600, 406.90, 407.59, 379.11, 388.04, 42511300],\n [1604327400, 394.00, 406.98, 392.30, 400.51, 29021100],\n [1604413800, 409.73, 427.77, 406.69, 423.90, 34351700],\n [1604500200, 430.62, 435.40, 417.10, 420.98, 32143100],\n [1604586600, 428.30, 440.00, 424.00, 438.09, 28414500],\n [1604673000, 436.10, 436.57, 424.28, 429.95, 21706000],\n [1604932200, 439.50, 452.50, 421.00, 421.26, 34833000],\n [1605018600, 420.09, 420.09, 396.03, 410.36, 30284200],\n [1605105000, 416.45, 418.70, 410.58, 417.13, 17357700],\n [1605191400, 415.05, 423.00, 409.52, 411.76, 19855100],\n [1605277800, 410.85, 412.53, 401.66, 408.50, 19771100],\n [1605537000, 408.93, 412.45, 404.09, 408.09, 26838600],\n [1605623400, 460.17, 462.00, 433.01, 441.61, 61188300],\n [1605709800, 448.35, 496.00, 443.50, 486.64, 78044000],\n [1605796200, 492.00, 508.61, 487.57, 499.27, 62475300],\n [1605882600, 497.99, 502.50, 489.06, 489.61, 32911900],\n [1606141800, 503.50, 526.00, 501.79, 521.85, 50260300],\n [1606228200, 540.40, 559.99, 526.20, 555.38, 53648500],\n [1606314600, 550.06, 574.00, 545.37, 574.00, 48930200],\n [1606487400, 581.16, 598.78, 578.45, 585.76, 37561100],\n [1606746600, 602.21, 607.80, 554.51, 567.60, 63003100],\n [1606833000, 597.59, 597.85, 572.05, 584.76, 40103500],\n [1606919400, 556.44, 571.54, 541.21, 568.82, 47775700],\n [1607005800, 590.02, 598.97, 582.43, 593.38, 42552000],\n [1607092200, 591.01, 599.04, 585.50, 599.04, 29401300],\n [1607351400, 604.92, 648.79, 603.05, 641.76, 56309700],\n [1607437800, 625.51, 651.28, 618.50, 649.88, 64265000],\n [1607524200, 653.69, 654.32, 588.00, 604.48, 71291200],\n [1607610600, 574.37, 627.75, 566.34, 627.07, 67083200],\n [1607697000, 615.01, 624.00, 596.80, 609.99, 46475000],\n [1607956200, 619.00, 642.75, 610.20, 639.83, 52040600],\n [1608042600, 643.28, 646.90, 623.80, 633.25, 45071500],\n [1608129000, 628.23, 632.50, 605.00, 622.77, 42095800],\n [1608215400, 628.19, 658.82, 619.50, 655.90, 56270100],\n [1608301800, 668.90, 695.00, 628.54, 695.00, 222126200],\n [1608561000, 666.24, 668.50, 646.07, 649.86, 58045300],\n [1608647400, 648.00, 649.88, 614.23, 640.34, 51716000],\n [1608733800, 632.20, 651.50, 622.57, 645.98, 33173000],\n [1608820200, 642.99, 666.09, 641.00, 661.77, 22865600],\n [1609165800, 674.51, 681.40, 660.80, 663.69, 32278600],\n [1609252200, 661.00, 669.90, 655.00, 665.99, 22910800],\n [1609338600, 672.00, 696.60, 668.36, 694.78, 42846000],\n [1609425000, 699.99, 718.72, 691.12, 705.67, 49649900],\n [1609770600, 719.46, 744.49, 717.19, 729.77, 48638200],\n [1609857000, 723.66, 740.84, 719.20, 735.11, 32245200],\n [1609943400, 758.49, 774.00, 749.10, 755.98, 44700000],\n [1610029800, 777.63, 816.99, 775.20, 816.04, 51498900],\n [1610116200, 856.00, 884.49, 838.39, 880.02, 75055500],\n [1610375400, 849.40, 854.43, 803.62, 811.19, 59301600],\n [1610461800, 831.00, 868.00, 827.34, 849.44, 46270700],\n [1610548200, 852.76, 860.47, 832.00, 854.41, 33312500],\n [1610634600, 843.39, 863.00, 838.75, 845.00, 31266300],\n [1610721000, 852.00, 859.90, 819.10, 826.16, 38777600],\n [1611066600, 837.80, 850.00, 833.00, 844.55, 25367000],\n [1611153000, 858.74, 859.50, 837.28, 850.45, 25665900],\n [1611239400, 855.00, 855.72, 841.42, 844.99, 20521100],\n [1611325800, 834.31, 848.00, 828.62, 846.64, 20066500],\n [1611585000, 855.00, 900.40, 838.82, 880.80, 41173400],\n [1611671400, 891.38, 895.90, 871.60, 883.09, 23131600],\n [1611757800, 870.35, 891.50, 858.66, 864.16, 27334000],\n [1611844200, 820.00, 848.00, 801.00, 835.43, 26378000],\n [1611930600, 830.00, 842.41, 780.10, 793.53, 34990800],\n [1612189800, 814.29, 842.00, 795.56, 839.81, 25391400],\n [1612276200, 844.68, 880.50, 842.20, 872.79, 24346200],\n [1612362600, 877.02, 878.08, 853.06, 854.69, 18343500],\n [1612449000, 855.00, 856.50, 833.42, 849.99, 15812700],\n [1612535400, 845.00, 864.77, 838.97, 852.23, 18566600],\n [1612794600, 869.67, 877.77, 854.75, 863.42, 20161700],\n [1612881000, 855.12, 859.80, 841.75, 849.46, 15157700],\n [1612967400, 843.64, 844.82, 800.02, 804.82, 36216100],\n [1613053800, 812.44, 829.88, 801.73, 811.66, 21622800],\n [1613140200, 801.26, 817.33, 785.33, 816.12, 23768300],\n [1613485800, 818.00, 821.00, 792.44, 796.22, 19802300],\n [1613572200, 779.09, 799.84, 762.01, 798.15, 25996500],\n [1613658600, 780.90, 794.69, 776.27, 787.38, 17957100],\n [1613745000, 795.00, 796.79, 777.37, 781.30, 18958300],\n [1614004200, 762.64, 768.50, 710.20, 714.50, 37269700],\n [1614090600, 662.13, 713.61, 619.00, 698.84, 66606900],\n [1614177000, 711.85, 745.00, 694.17, 742.02, 36767000],\n [1614263400, 726.15, 737.21, 670.58, 682.22, 39023900],\n [1614349800, 700.00, 706.70, 659.51, 675.50, 41089200],\n [1614609000, 690.11, 719.00, 685.05, 718.43, 27136200],\n [1614695400, 718.28, 721.11, 685.00, 686.44, 23732200],\n [1614781800, 687.99, 700.70, 651.71, 653.20, 30208000],\n [1614868200, 655.80, 668.45, 600.00, 621.44, 65919500],\n [1614954600, 626.06, 627.84, 539.49, 597.95, 89396500],\n [1615213800, 600.55, 620.13, 558.79, 563.00, 51787000],\n [1615300200, 608.18, 678.09, 595.21, 673.58, 67523300],\n [1615386600, 700.30, 717.85, 655.06, 668.06, 60605700],\n [1615473000, 699.40, 702.50, 677.18, 699.60, 36253900],\n [1615559400, 670.00, 694.88, 666.14, 693.73, 33583800],\n [1615815000, 694.09, 713.18, 684.04, 707.94, 29335600],\n [1615901400, 703.35, 707.92, 671.00, 676.88, 32195700],\n [1615987800, 656.87, 703.73, 651.01, 701.81, 40372500],\n [1616074200, 684.29, 689.23, 652.00, 653.16, 33224800],\n [1616160600, 646.60, 657.23, 624.62, 654.87, 42894000],\n [1616419800, 684.59, 699.62, 668.75, 670.00, 39512200],\n [1616506200, 675.77, 677.80, 657.51, 662.16, 30491900],\n [1616592600, 667.91, 668.02, 630.11, 630.27, 33795200],\n [1616679000, 613.00, 645.50, 609.50, 640.39, 39224900],\n [1616765400, 641.87, 643.82, 599.89, 618.71, 33852800],\n [1617024600, 615.64, 616.48, 596.02, 611.29, 28637000],\n [1617111000, 601.75, 637.66, 591.01, 635.62, 39432400],\n [1617197400, 646.62, 672.00, 641.11, 667.93, 33337300],\n [1617283800, 688.37, 692.42, 659.42, 661.75, 35298400],\n [1617629400, 707.71, 708.16, 684.70, 691.05, 41842800],\n [1617715800, 690.30, 696.55, 681.37, 691.62, 28271800],\n [1617802200, 687.00, 691.38, 667.84, 670.97, 26309400],\n [1617888600, 677.38, 689.55, 671.65, 683.80, 23924300],\n [1617975000, 677.77, 680.97, 669.43, 677.02, 21437100],\n [1618234200, 685.70, 704.80, 682.09, 701.98, 29135700],\n [1618320600, 712.70, 763.00, 710.66, 762.32, 44652800],\n [1618407000, 770.70, 780.79, 728.03, 732.23, 49017400],\n [1618493400, 743.10, 743.69, 721.31, 738.85, 27848900],\n [1618579800, 728.65, 749.41, 724.60, 739.78, 27979500],\n [1618839000, 719.60, 725.40, 691.80, 714.63, 39686200],\n [1618925400, 717.42, 737.25, 710.69, 718.99, 35609000],\n [1619011800, 704.77, 744.84, 698.00, 744.12, 31215500],\n [1619098200, 741.50, 753.77, 718.04, 719.69, 35590300],\n [1619184600, 719.80, 737.36, 715.46, 729.40, 28370000],\n [1619443800, 741.00, 749.30, 732.61, 738.20, 31038500],\n [1619530200, 717.96, 724.00, 703.35, 704.74, 29437000],\n [1619616600, 696.41, 708.50, 693.60, 694.40, 22271000],\n [1619703000, 699.51, 702.25, 668.50, 677.00, 28845400],\n [1619789400, 667.59, 715.47, 666.14, 709.44, 40758700],\n [1620048600, 703.80, 706.00, 680.50, 684.90, 27043100],\n [1620135000, 678.94, 683.45, 657.70, 673.60, 29739300],\n [1620221400, 681.06, 685.30, 667.34, 670.94, 21901900],\n [1620307800, 680.76, 681.02, 650.00, 663.54, 27784600],\n [1620394200, 665.80, 690.00, 660.22, 672.37, 23469200],\n [1620653400, 664.90, 665.05, 627.61, 629.04, 31392400],\n [1620739800, 599.24, 627.10, 595.60, 617.20, 46503900],\n [1620826200, 602.49, 620.41, 586.77, 589.89, 33823600],\n [1620912600, 601.54, 606.46, 559.65, 571.69, 44184900],\n [1620999000, 583.41, 592.87, 570.46, 589.74, 33370900],\n [1621258200, 575.55, 589.73, 561.20, 576.83, 32390400],\n [1621344600, 568.00, 596.25, 563.38, 577.87, 36830600],\n [1621431000, 552.55, 566.21, 546.98, 563.46, 39578400],\n [1621517400, 575.00, 588.85, 571.07, 586.78, 30821100],\n [1621603800, 596.11, 596.68, 580.00, 580.88, 26030600],\n [1621863000, 581.60, 614.48, 573.65, 606.44, 34558100],\n [1621949400, 607.31, 613.99, 595.71, 604.69, 28005900],\n [1622035800, 607.56, 626.17, 601.50, 619.13, 28639300],\n [1622122200, 620.24, 631.13, 616.21, 630.85, 26370600],\n [1622208600, 628.50, 635.59, 622.38, 625.22, 22737000],\n [1622554200, 627.80, 633.80, 620.55, 623.90, 18084900],\n [1622640600, 620.13, 623.36, 599.14, 605.12, 23302800],\n [1622727000, 601.80, 604.55, 571.22, 572.84, 30111900],\n [1622813400, 579.71, 600.61, 577.20, 599.05, 24036900],\n [1623072600, 591.83, 610.00, 582.88, 605.13, 22543700],\n [1623159000, 623.01, 623.09, 595.50, 603.59, 26053400],\n [1623245400, 602.17, 611.79, 597.63, 598.78, 16584600],\n [1623331800, 603.88, 616.59, 600.50, 610.12, 23919600],\n [1623418200, 610.23, 612.56, 601.52, 609.89, 16205300],\n [1623677400, 612.23, 625.49, 609.18, 617.69, 20424000],\n [1623763800, 616.69, 616.79, 598.23, 599.36, 17764100],\n [1623850200, 597.54, 608.50, 593.50, 604.87, 22144100],\n [1623936600, 601.89, 621.47, 601.34, 616.60, 22701400],\n [1624023000, 613.37, 628.35, 611.80, 623.31, 24560900],\n [1624282200, 624.48, 631.39, 608.88, 620.83, 24812700],\n [1624368600, 618.25, 628.57, 615.50, 623.71, 19158900],\n [1624455000, 632.00, 657.20, 630.04, 656.57, 31099200],\n [1624541400, 674.99, 697.62, 667.61, 679.82, 45982400],\n [1624627800, 689.58, 693.81, 668.70, 671.87, 32496700],\n [1624887000, 671.64, 694.70, 670.32, 688.72, 21628200],\n [1624973400, 684.65, 687.51, 675.89, 680.76, 17381300],\n [1625059800, 679.77, 692.81, 678.14, 679.70, 18924900],\n [1625146200, 683.92, 687.99, 672.80, 677.92, 18634500],\n [1625232600, 678.98, 700.00, 673.26, 678.90, 27054500],\n [1625578200, 681.71, 684.00, 651.40, 659.58, 23284500],\n [1625664600, 664.27, 665.70, 638.32, 644.65, 18792000],\n [1625751000, 628.37, 654.43, 620.46, 652.81, 22773300],\n [1625837400, 653.18, 658.91, 644.69, 656.95, 18140500],\n [1626096600, 662.20, 687.24, 662.16, 685.70, 25927000],\n [1626183000, 686.32, 693.28, 666.30, 668.54, 20966100],\n [1626269400, 670.75, 678.61, 652.84, 653.38, 21641200],\n [1626355800, 658.39, 666.14, 637.88, 650.60, 20209600],\n [1626442200, 654.68, 656.70, 642.20, 644.22, 16371000],\n [1626701400, 629.89, 647.20, 621.29, 646.22, 21297100],\n [1626787800, 651.99, 662.39, 640.50, 660.50, 15487100],\n [1626874200, 659.61, 664.86, 650.29, 655.29, 13953300],\n [1626960600, 656.44, 662.17, 644.60, 649.26, 15105700],\n [1627047000, 646.36, 648.80, 637.30, 643.38, 14604900],\n [1627306200, 650.97, 668.20, 647.11, 657.62, 25336600],\n [1627392600, 663.40, 666.50, 627.24, 644.78, 32813300],\n [1627479000, 647.00, 654.97, 639.40, 646.98, 16006600],\n [1627565400, 649.79, 683.69, 648.80, 677.35, 30394600],\n [1627651800, 671.76, 697.53, 669.00, 687.20, 29600500],\n [1627911000, 700.00, 726.94, 698.40, 709.67, 33615800],\n [1627997400, 719.00, 722.65, 701.01, 709.74, 21620300],\n [1628083800, 711.00, 724.90, 708.93, 710.92, 17002600],\n [1628170200, 716.00, 720.95, 711.41, 714.63, 12919600],\n [1628256600, 711.90, 716.33, 697.63, 699.10, 15576200],\n [1628515800, 710.17, 719.03, 705.13, 713.76, 14715300],\n [1628602200, 713.99, 716.59, 701.88, 709.99, 13432300],\n [1628688600, 712.71, 715.18, 704.21, 707.82, 9800600],\n [1628775000, 706.34, 722.80, 699.40, 722.25, 17459100],\n [1628861400, 723.71, 729.90, 714.34, 717.17, 16698900],\n [1629120600, 705.07, 709.50, 676.40, 686.17, 22677400],\n [1629207000, 672.66, 674.58, 648.84, 665.71, 23721300],\n [1629293400, 669.75, 695.77, 669.35, 688.99, 20349400],\n [1629379800, 678.21, 686.55, 667.59, 673.47, 14313500],\n [1629466200, 682.85, 692.13, 673.70, 680.26, 14781800],\n [1629725400, 685.44, 712.13, 680.75, 706.30, 20264900],\n [1629811800, 710.68, 715.22, 702.64, 708.49, 13083100],\n [1629898200, 707.03, 716.97, 704.00, 711.20, 12645600],\n [1629984600, 708.31, 715.40, 697.62, 701.16, 13214300],\n [1630071000, 705.00, 715.00, 702.10, 711.92, 13762100],\n [1630330200, 714.72, 731.00, 712.73, 730.91, 18604200],\n [1630416600, 733.00, 740.39, 726.44, 735.72, 20855400],\n [1630503000, 734.08, 741.99, 731.27, 734.09, 13204300],\n [1630589400, 734.50, 740.97, 730.54, 732.39, 12777300],\n [1630675800, 732.25, 734.00, 724.20, 733.57, 15246100],\n [1631021400, 740.00, 760.20, 739.26, 752.92, 20039800],\n [1631107800, 761.58, 764.45, 740.77, 753.87, 18793000],\n [1631194200, 753.41, 762.10, 751.63, 754.86, 14077700],\n [1631280600, 759.60, 762.61, 734.52, 736.27, 15114300],\n [1631539800, 740.21, 744.78, 708.85, 743.00, 22952500],\n [1631626200, 742.57, 754.47, 736.40, 744.49, 18524900],\n [1631712600, 745.00, 756.86, 738.36, 755.83, 15357700],\n [1631799000, 752.83, 758.91, 747.61, 756.99, 13923400],\n [1631885400, 757.15, 761.04, 750.00, 759.49, 28204200],\n [1632144600, 734.56, 742.00, 718.62, 730.17, 24757700],\n [1632231000, 734.79, 744.74, 730.44, 739.38, 16330700],\n [1632317400, 743.53, 753.67, 739.12, 751.94, 15126300],\n [1632403800, 755.00, 758.20, 747.92, 753.64, 11947500],\n [1632490200, 745.89, 774.80, 744.56, 774.39, 21373000],\n [1632749400, 773.12, 799.00, 769.31, 791.36, 28070700],\n [1632835800, 787.20, 795.64, 766.18, 777.56, 25381400],\n [1632922200, 779.80, 793.50, 770.68, 781.31, 20942900],\n [1633008600, 781.00, 789.13, 775.00, 775.48, 17956000],\n [1633095000, 778.40, 780.78, 763.59, 775.22, 17031400],\n [1633354200, 796.50, 806.97, 776.12, 781.53, 30483300],\n [1633440600, 784.80, 797.31, 774.20, 780.59, 18432600],\n [1633527000, 776.20, 786.66, 773.22, 782.75, 14632800],\n [1633613400, 785.46, 805.00, 783.38, 793.61, 19195800],\n [1633699800, 796.21, 796.38, 780.91, 785.49, 16711100],\n [1633959000, 787.65, 801.24, 785.50, 791.94, 14175800],\n [1634064472, 800.93, 812.32, 796.57, 811.41, 17289281],\n ];\n\n static List get candles => _rawData\n .map((row) => CandleData(\n timestamp: row[0] * 1000,\n open: row[1]?.toDouble(),\n high: row[2]?.toDouble(),\n low: row[3]?.toDouble(),\n close: row[4]?.toDouble(),\n volume: row[5]?.toDouble(),\n ))\n .toList();\n}\n" }, { "path": "example/pubspec.yaml", "content": "name: example\ndescription: A new Flutter project.\npublish_to: 'none'\n\nenvironment:\n sdk: ^3.0.0\n\ndependencies:\n flutter:\n sdk: flutter\n\n cupertino_icons: ^1.0.2\n interactive_chart:\n path: ../\n\ndev_dependencies:\n flutter_lints:\n\nflutter:\n uses-material-design: true\n" }, { "path": "example/web/index.html", "content": "\n\n\n \n \n\n \n \n \n\n \n \n \n \n \n\n \n \n\n example\n \n\n\n \n\n\n" }, { "path": "example/web/manifest.json", "content": "{\n \"name\": \"example\",\n \"short_name\": \"example\",\n \"start_url\": \".\",\n \"display\": \"standalone\",\n \"background_color\": \"#0175C2\",\n \"theme_color\": \"#0175C2\",\n \"description\": \"A new Flutter project.\",\n \"orientation\": \"portrait-primary\",\n \"prefer_related_applications\": false,\n \"icons\": [\n {\n \"src\": \"icons/Icon-192.png\",\n \"sizes\": \"192x192\",\n \"type\": \"image/png\"\n },\n {\n \"src\": \"icons/Icon-512.png\",\n \"sizes\": \"512x512\",\n \"type\": \"image/png\"\n },\n {\n \"src\": \"icons/Icon-maskable-192.png\",\n \"sizes\": \"192x192\",\n \"type\": \"image/png\",\n \"purpose\": \"maskable\"\n },\n {\n \"src\": \"icons/Icon-maskable-512.png\",\n \"sizes\": \"512x512\",\n \"type\": \"image/png\",\n \"purpose\": \"maskable\"\n }\n ]\n}\n" }, { "path": "lib/interactive_chart.dart", "content": "export 'src/candle_data.dart';\nexport 'src/interactive_chart.dart';\nexport 'src/chart_style.dart';\n" }, { "path": "lib/src/candle_data.dart", "content": "class CandleData {\n /// The timestamp of this data point, in milliseconds since epoch.\n final int timestamp;\n\n /// The \"open\" price of this data point. It's acceptable to have null here for\n /// a few data points, but they must not all be null. If either [open] or\n /// [close] is null for a data point, it will appear as a gap in the chart.\n final double? open;\n\n /// The \"high\" price. If either one of [high] or [low] is null, we won't\n /// draw the narrow part of the candlestick for that data point.\n final double? high;\n\n /// The \"low\" price. If either one of [high] or [low] is null, we won't\n /// draw the narrow part of the candlestick for that data point.\n final double? low;\n\n /// The \"close\" price of this data point. It's acceptable to have null here\n /// for a few data points, but they must not all be null. If either [open] or\n /// [close] is null for a data point, it will appear as a gap in the chart.\n final double? close;\n\n /// The volume information of this data point.\n final double? volume;\n\n /// Data holder for additional trend lines, for this data point.\n ///\n /// For a single trend line, we can assign it as a list with a single element.\n /// For example if we want \"7 days moving average\", do something like\n /// `trends = [ma7]`. If there are multiple tread lines, we can assign a list\n /// with multiple elements, like `trends = [ma7, ma30]`.\n /// If we don't want any trend lines, we can assign an empty list.\n ///\n /// This should be an unmodifiable list, so please do not use `add`\n /// or `clear` methods on the list. Always assign a new list if values\n /// are changed. Otherwise the UI might not be updated.\n List trends;\n\n CandleData({\n required this.timestamp,\n required this.open,\n required this.close,\n required this.volume,\n this.high,\n this.low,\n List? trends,\n }) : this.trends = List.unmodifiable(trends ?? []);\n\n static List computeMA(List data, [int period = 7]) {\n // If data is not at least twice as long as the period, return nulls.\n if (data.length < period * 2) return List.filled(data.length, null);\n\n final List result = [];\n // Skip the first [period] data points. For example, skip 7 data points.\n final firstPeriod =\n data.take(period).map((d) => d.close).whereType();\n double ma = firstPeriod.reduce((a, b) => a + b) / firstPeriod.length;\n result.addAll(List.filled(period, null));\n\n // Compute the moving average for the rest of the data points.\n for (int i = period; i < data.length; i++) {\n final curr = data[i].close;\n final prev = data[i - period].close;\n if (curr != null && prev != null) {\n ma = (ma * period + curr - prev) / period;\n result.add(ma);\n } else {\n result.add(null);\n }\n }\n return result;\n }\n\n @override\n String toString() => \"\";\n}\n" }, { "path": "lib/src/chart_painter.dart", "content": "import 'dart:math';\n\nimport 'package:flutter/material.dart';\n\nimport 'candle_data.dart';\nimport 'painter_params.dart';\n\ntypedef TimeLabelGetter = String Function(int timestamp, int visibleDataCount);\ntypedef PriceLabelGetter = String Function(double price);\ntypedef OverlayInfoGetter = Map Function(CandleData candle);\n\nclass ChartPainter extends CustomPainter {\n final PainterParams params;\n final TimeLabelGetter getTimeLabel;\n final PriceLabelGetter getPriceLabel;\n final OverlayInfoGetter getOverlayInfo;\n\n ChartPainter({\n required this.params,\n required this.getTimeLabel,\n required this.getPriceLabel,\n required this.getOverlayInfo,\n });\n\n @override\n void paint(Canvas canvas, Size size) {\n // Draw time labels (dates) & price labels\n _drawTimeLabels(canvas, params);\n _drawPriceGridAndLabels(canvas, params);\n\n // Draw prices, volumes & trend line\n canvas.save();\n canvas.clipRect(Offset.zero & Size(params.chartWidth, params.chartHeight));\n // canvas.drawRect(\n // // apply yellow tint to clipped area (for debugging)\n // Offset.zero & Size(params.chartWidth, params.chartHeight),\n // Paint()..color = Colors.yellow[100]!,\n // );\n canvas.translate(params.xShift, 0);\n for (int i = 0; i < params.candles.length; i++) {\n _drawSingleDay(canvas, params, i);\n }\n canvas.restore();\n\n // Draw tap highlight & overlay\n if (params.tapPosition != null) {\n if (params.tapPosition!.dx < params.chartWidth) {\n _drawTapHighlightAndOverlay(canvas, params);\n }\n }\n }\n\n void _drawTimeLabels(canvas, PainterParams params) {\n // We draw one time label per 90 pixels of screen width\n final lineCount = params.chartWidth ~/ 90;\n final gap = 1 / (lineCount + 1);\n for (int i = 1; i <= lineCount; i++) {\n double x = i * gap * params.chartWidth;\n final index = params.getCandleIndexFromOffset(x);\n if (index < params.candles.length) {\n final candle = params.candles[index];\n final visibleDataCount = params.candles.length;\n final timeTp = TextPainter(\n text: TextSpan(\n text: getTimeLabel(candle.timestamp, visibleDataCount),\n style: params.style.timeLabelStyle,\n ),\n )\n ..textDirection = TextDirection.ltr\n ..layout();\n\n // Align texts towards vertical bottom\n final topPadding = params.style.timeLabelHeight - timeTp.height;\n timeTp.paint(\n canvas,\n Offset(x - timeTp.width / 2, params.chartHeight + topPadding),\n );\n }\n }\n }\n\n void _drawPriceGridAndLabels(canvas, PainterParams params) {\n [0.0, 0.25, 0.5, 0.75, 1.0]\n .map((v) => ((params.maxPrice - params.minPrice) * v) + params.minPrice)\n .forEach((y) {\n canvas.drawLine(\n Offset(0, params.fitPrice(y)),\n Offset(params.chartWidth, params.fitPrice(y)),\n Paint()\n ..strokeWidth = 0.5\n ..color = params.style.priceGridLineColor,\n );\n final priceTp = TextPainter(\n text: TextSpan(\n text: getPriceLabel(y),\n style: params.style.priceLabelStyle,\n ),\n )\n ..textDirection = TextDirection.ltr\n ..layout();\n priceTp.paint(\n canvas,\n Offset(\n params.chartWidth + 4,\n params.fitPrice(y) - priceTp.height / 2,\n ));\n });\n }\n\n void _drawSingleDay(canvas, PainterParams params, int i) {\n final candle = params.candles[i];\n final x = i * params.candleWidth;\n final thickWidth = max(params.candleWidth * 0.8, 0.8);\n final thinWidth = max(params.candleWidth * 0.2, 0.2);\n // Draw price bar\n final open = candle.open;\n final close = candle.close;\n final high = candle.high;\n final low = candle.low;\n if (open != null && close != null) {\n final color = open > close\n ? params.style.priceLossColor\n : params.style.priceGainColor;\n canvas.drawLine(\n Offset(x, params.fitPrice(open)),\n Offset(x, params.fitPrice(close)),\n Paint()\n ..strokeWidth = thickWidth\n ..color = color,\n );\n if (high != null && low != null) {\n canvas.drawLine(\n Offset(x, params.fitPrice(high)),\n Offset(x, params.fitPrice(low)),\n Paint()\n ..strokeWidth = thinWidth\n ..color = color,\n );\n }\n }\n // Draw volume bar\n final volume = candle.volume;\n if (volume != null) {\n canvas.drawLine(\n Offset(x, params.chartHeight),\n Offset(x, params.fitVolume(volume)),\n Paint()\n ..strokeWidth = thickWidth\n ..color = params.style.volumeColor,\n );\n }\n // Draw trend line\n for (int j = 0; j < candle.trends.length; j++) {\n final trendLinePaint = params.style.trendLineStyles.at(j) ??\n (Paint()\n ..strokeWidth = 2.0\n ..strokeCap = StrokeCap.round\n ..color = Colors.blue);\n\n final pt = candle.trends.at(j); // current data point\n final prevPt = params.candles.at(i - 1)?.trends.at(j);\n if (pt != null && prevPt != null) {\n canvas.drawLine(\n Offset(x - params.candleWidth, params.fitPrice(prevPt)),\n Offset(x, params.fitPrice(pt)),\n trendLinePaint,\n );\n }\n if (i == 0) {\n // In the front, draw an extra line connecting to out-of-window data\n if (pt != null && params.leadingTrends?.at(j) != null) {\n canvas.drawLine(\n Offset(x - params.candleWidth,\n params.fitPrice(params.leadingTrends!.at(j)!)),\n Offset(x, params.fitPrice(pt)),\n trendLinePaint,\n );\n }\n } else if (i == params.candles.length - 1) {\n // At the end, draw an extra line connecting to out-of-window data\n if (pt != null && params.trailingTrends?.at(j) != null) {\n canvas.drawLine(\n Offset(x, params.fitPrice(pt)),\n Offset(\n x + params.candleWidth,\n params.fitPrice(params.trailingTrends!.at(j)!),\n ),\n trendLinePaint,\n );\n }\n }\n }\n }\n\n void _drawTapHighlightAndOverlay(canvas, PainterParams params) {\n final pos = params.tapPosition!;\n final i = params.getCandleIndexFromOffset(pos.dx);\n final candle = params.candles[i];\n canvas.save();\n canvas.translate(params.xShift, 0.0);\n // Draw highlight bar (selection box)\n canvas.drawLine(\n Offset(i * params.candleWidth, 0.0),\n Offset(i * params.candleWidth, params.chartHeight),\n Paint()\n ..strokeWidth = max(params.candleWidth * 0.88, 1.0)\n ..color = params.style.selectionHighlightColor);\n canvas.restore();\n // Draw info pane\n _drawTapInfoOverlay(canvas, params, candle);\n }\n\n void _drawTapInfoOverlay(canvas, PainterParams params, CandleData candle) {\n final xGap = 8.0;\n final yGap = 4.0;\n\n TextPainter makeTP(String text) => TextPainter(\n text: TextSpan(\n text: text,\n style: params.style.overlayTextStyle,\n ),\n )\n ..textDirection = TextDirection.ltr\n ..layout();\n\n final info = getOverlayInfo(candle);\n if (info.isEmpty) return;\n final labels = info.keys.map((text) => makeTP(text)).toList();\n final values = info.values.map((text) => makeTP(text)).toList();\n\n final labelsMaxWidth = labels.map((tp) => tp.width).reduce(max);\n final valuesMaxWidth = values.map((tp) => tp.width).reduce(max);\n final panelWidth = labelsMaxWidth + valuesMaxWidth + xGap * 3;\n final panelHeight = max(\n labels.map((tp) => tp.height).reduce((a, b) => a + b),\n values.map((tp) => tp.height).reduce((a, b) => a + b),\n ) +\n yGap * (values.length + 1);\n\n // Shift the canvas, so the overlay panel can appear near touch position.\n canvas.save();\n final pos = params.tapPosition!;\n final fingerSize = 32.0; // leave some margin around user's finger\n double dx, dy;\n assert(params.size.width >= panelWidth, \"Overlay panel is too wide.\");\n if (pos.dx <= params.size.width / 2) {\n // If user touches the left-half of the screen,\n // we show the overlay panel near finger touch position, on the right.\n dx = pos.dx + fingerSize;\n } else {\n // Otherwise we show panel on the left of the finger touch position.\n dx = pos.dx - panelWidth - fingerSize;\n }\n dx = dx.clamp(0, params.size.width - panelWidth);\n dy = pos.dy - panelHeight - fingerSize;\n if (dy < 0) dy = 0.0;\n canvas.translate(dx, dy);\n\n // Draw the background for overlay panel\n canvas.drawRRect(\n RRect.fromRectAndRadius(\n Offset.zero & Size(panelWidth, panelHeight),\n Radius.circular(8),\n ),\n Paint()..color = params.style.overlayBackgroundColor);\n\n // Draw texts\n var y = 0.0;\n for (int i = 0; i < labels.length; i++) {\n y += yGap;\n final rowHeight = max(labels[i].height, values[i].height);\n // Draw labels (left align, vertical center)\n final labelY = y + (rowHeight - labels[i].height) / 2; // vertical center\n labels[i].paint(canvas, Offset(xGap, labelY));\n\n // Draw values (right align, vertical center)\n final leading = valuesMaxWidth - values[i].width; // right align\n final valueY = y + (rowHeight - values[i].height) / 2; // vertical center\n values[i].paint(\n canvas,\n Offset(labelsMaxWidth + xGap * 2 + leading, valueY),\n );\n y += rowHeight;\n }\n\n canvas.restore();\n }\n\n @override\n bool shouldRepaint(ChartPainter oldDelegate) =>\n params.shouldRepaint(oldDelegate.params);\n}\n\nextension ElementAtOrNull on List {\n E? at(int index) {\n if (index < 0 || index >= length) return null;\n return elementAt(index);\n }\n}\n" }, { "path": "lib/src/chart_style.dart", "content": "import 'package:flutter/material.dart';\n\nclass ChartStyle {\n /// The percentage height of volume.\n ///\n /// Defaults to 0.2, which means volume bars will be 20% of total height,\n /// thus leaving price bars to be 80% of the total height.\n final double volumeHeightFactor;\n\n /// The padding on the right-side of the chart.\n final double priceLabelWidth;\n\n /// The padding on the bottom-side of the chart.\n ///\n /// Defaults to 24.0, date/time labels is drawn vertically bottom-aligned,\n /// thus adjusting this value would also control the padding between\n /// the chart and the date/time labels.\n final double timeLabelHeight;\n\n /// The style of date/time labels (on the bottom of the chart).\n final TextStyle timeLabelStyle;\n\n /// The style of price labels (on the right of the chart).\n final TextStyle priceLabelStyle;\n\n /// The style of overlay texts. These texts are drawn on top of the\n /// background color specified in [overlayBackgroundColor].\n ///\n /// This appears when user clicks on the chart.\n final TextStyle overlayTextStyle;\n\n /// The color to use when the `close` price is higher than `open` price.\n final Color priceGainColor;\n\n /// The color to use when the `close` price is lower than `open` price.\n final Color priceLossColor;\n\n /// The color of the `volume` bars.\n final Color volumeColor;\n\n /// The style of trend lines. If there are multiple lines, their styles will\n /// be chosen in the order of appearance in this list. If this list is shorter\n /// than the number of trend lines, a default blue paint will be applied.\n final List trendLineStyles;\n\n /// The color of the price grid line.\n final Color priceGridLineColor;\n\n /// The highlight color. This appears when user clicks on the chart.\n final Color selectionHighlightColor;\n\n /// The background color of the overlay.\n ///\n /// This appears when user clicks on the chart.\n final Color overlayBackgroundColor;\n\n const ChartStyle({\n this.volumeHeightFactor = 0.2,\n this.priceLabelWidth = 48.0,\n this.timeLabelHeight = 24.0,\n this.timeLabelStyle = const TextStyle(\n fontSize: 16,\n color: Colors.grey,\n ),\n this.priceLabelStyle = const TextStyle(\n fontSize: 12,\n color: Colors.grey,\n ),\n this.overlayTextStyle = const TextStyle(\n fontSize: 16,\n color: Colors.white,\n ),\n this.priceGainColor = Colors.green,\n this.priceLossColor = Colors.red,\n this.volumeColor = Colors.grey,\n this.trendLineStyles = const [],\n this.priceGridLineColor = Colors.grey,\n this.selectionHighlightColor = const Color(0x33757575),\n this.overlayBackgroundColor = const Color(0xEE757575),\n });\n}\n" }, { "path": "lib/src/interactive_chart.dart", "content": "import 'dart:math';\n\nimport 'package:flutter/gestures.dart';\nimport 'package:flutter/widgets.dart';\nimport 'package:intl/intl.dart' as intl;\n\nimport 'candle_data.dart';\nimport 'chart_painter.dart';\nimport 'chart_style.dart';\nimport 'painter_params.dart';\n\nclass InteractiveChart extends StatefulWidget {\n /// The full list of [CandleData] to be used for this chart.\n ///\n /// It needs to have at least 3 data points. If data is sufficiently large,\n /// the chart will default to display the most recent 90 data points when\n /// first opened (configurable with [initialVisibleCandleCount] parameter),\n /// and allow users to freely zoom and pan however they like.\n final List candles;\n\n /// The default number of data points to be displayed when the chart is first\n /// opened. The default value is 90. If [CandleData] does not have enough data\n /// points, the chart will display all of them.\n final int initialVisibleCandleCount;\n\n /// If non-null, the style to use for this chart.\n final ChartStyle style;\n\n /// How the date/time label at the bottom are displayed.\n ///\n /// If null, it defaults to use yyyy-mm format if more than 20 data points\n /// are visible in the current chart window, otherwise it uses mm-dd format.\n final TimeLabelGetter? timeLabel;\n\n /// How the price labels on the right are displayed.\n ///\n /// If null, it defaults to show 2 digits after the decimal point.\n final PriceLabelGetter? priceLabel;\n\n /// How the overlay info are displayed, when user touches the chart.\n ///\n /// If null, it defaults to display `date`, `open`, `high`, `low`, `close`\n /// and `volume` fields when user selects a data point in the chart.\n ///\n /// To customize it, pass in a function that returns a Map:\n /// ```dart\n /// return {\n /// \"Date\": \"Customized date string goes here\",\n /// \"Open\": candle.open?.toStringAsFixed(2) ?? \"-\",\n /// \"Close\": candle.close?.toStringAsFixed(2) ?? \"-\",\n /// };\n /// ```\n final OverlayInfoGetter? overlayInfo;\n\n /// An optional event, fired when the user clicks on a candlestick.\n final ValueChanged? onTap;\n\n /// An optional event, fired when user zooms in/out.\n ///\n /// This provides the width of a candlestick at the current zoom level.\n final ValueChanged? onCandleResize;\n\n const InteractiveChart({\n Key? key,\n required this.candles,\n this.initialVisibleCandleCount = 90,\n ChartStyle? style,\n this.timeLabel,\n this.priceLabel,\n this.overlayInfo,\n this.onTap,\n this.onCandleResize,\n }) : this.style = style ?? const ChartStyle(),\n assert(candles.length >= 3,\n \"InteractiveChart requires 3 or more CandleData\"),\n assert(initialVisibleCandleCount >= 3,\n \"initialVisibleCandleCount must be more 3 or more\"),\n super(key: key);\n\n @override\n _InteractiveChartState createState() => _InteractiveChartState();\n}\n\nclass _InteractiveChartState extends State {\n // The width of an individual bar in the chart.\n late double _candleWidth;\n\n // The x offset (in px) of current visible chart window,\n // measured against the beginning of the chart.\n // i.e. a value of 0.0 means we are displaying data for the very first day,\n // and a value of 20 * _candleWidth would be skipping the first 20 days.\n late double _startOffset;\n\n // The position that user is currently tapping, null if user let go.\n Offset? _tapPosition;\n\n double? _prevChartWidth; // used by _handleResize\n late double _prevCandleWidth;\n late double _prevStartOffset;\n late Offset _initialFocalPoint;\n PainterParams? _prevParams; // used in onTapUp event\n\n @override\n Widget build(BuildContext context) {\n return LayoutBuilder(\n builder: (BuildContext context, BoxConstraints constraints) {\n final size = constraints.biggest;\n final w = size.width - widget.style.priceLabelWidth;\n _handleResize(w);\n\n // Find the visible data range\n final int start = (_startOffset / _candleWidth).floor();\n final int count = (w / _candleWidth).ceil();\n final int end = (start + count).clamp(start, widget.candles.length);\n final candlesInRange = widget.candles.getRange(start, end).toList();\n if (end < widget.candles.length) {\n // Put in an extra item, since it can become visible when scrolling\n final nextItem = widget.candles[end];\n candlesInRange.add(nextItem);\n }\n\n // If possible, find neighbouring trend line data,\n // so the chart could draw better-connected lines\n final leadingTrends = widget.candles.at(start - 1)?.trends;\n final trailingTrends = widget.candles.at(end + 1)?.trends;\n\n // Find the horizontal shift needed when drawing the candles.\n // First, always shift the chart by half a candle, because when we\n // draw a line using a thick paint, it spreads to both sides.\n // Then, we find out how much \"fraction\" of a candle is visible, since\n // when users scroll, they don't always stop at exact intervals.\n final halfCandle = _candleWidth / 2;\n final fractionCandle = _startOffset - start * _candleWidth;\n final xShift = halfCandle - fractionCandle;\n\n // Calculate min and max among the visible data\n double? highest(CandleData c) {\n if (c.high != null) return c.high;\n if (c.open != null && c.close != null) return max(c.open!, c.close!);\n return c.open ?? c.close;\n }\n\n double? lowest(CandleData c) {\n if (c.low != null) return c.low;\n if (c.open != null && c.close != null) return min(c.open!, c.close!);\n return c.open ?? c.close;\n }\n\n final maxPrice =\n candlesInRange.map(highest).whereType().reduce(max);\n final minPrice =\n candlesInRange.map(lowest).whereType().reduce(min);\n final maxVol = candlesInRange\n .map((c) => c.volume)\n .whereType()\n .fold(double.negativeInfinity, max);\n final minVol = candlesInRange\n .map((c) => c.volume)\n .whereType()\n .fold(double.infinity, min);\n\n final child = TweenAnimationBuilder(\n tween: PainterParamsTween(\n end: PainterParams(\n candles: candlesInRange,\n style: widget.style,\n size: size,\n candleWidth: _candleWidth,\n startOffset: _startOffset,\n maxPrice: maxPrice,\n minPrice: minPrice,\n maxVol: maxVol,\n minVol: minVol,\n xShift: xShift,\n tapPosition: _tapPosition,\n leadingTrends: leadingTrends,\n trailingTrends: trailingTrends,\n ),\n ),\n duration: Duration(milliseconds: 300),\n curve: Curves.easeOut,\n builder: (_, PainterParams params, __) {\n _prevParams = params;\n return RepaintBoundary(\n child: CustomPaint(\n size: size,\n painter: ChartPainter(\n params: params,\n getTimeLabel: widget.timeLabel ?? defaultTimeLabel,\n getPriceLabel: widget.priceLabel ?? defaultPriceLabel,\n getOverlayInfo: widget.overlayInfo ?? defaultOverlayInfo,\n ),\n ),\n );\n },\n );\n\n return Listener(\n onPointerSignal: (signal) {\n if (signal is PointerScrollEvent) {\n final dy = signal.scrollDelta.dy;\n if (dy.abs() > 0) {\n _onScaleStart(signal.position);\n _onScaleUpdate(\n dy > 0 ? 0.9 : 1.1,\n signal.position,\n w,\n );\n }\n }\n },\n child: GestureDetector(\n // Tap and hold to view candle details\n onTapDown: (details) => setState(() {\n _tapPosition = details.localPosition;\n }),\n onTapCancel: () => setState(() => _tapPosition = null),\n onTapUp: (_) {\n // Fire callback event and reset _tapPosition\n if (widget.onTap != null) _fireOnTapEvent();\n setState(() => _tapPosition = null);\n },\n // Pan and zoom\n onScaleStart: (details) => _onScaleStart(details.localFocalPoint),\n onScaleUpdate: (details) =>\n _onScaleUpdate(details.scale, details.localFocalPoint, w),\n child: child,\n ),\n );\n },\n );\n }\n\n _onScaleStart(Offset focalPoint) {\n _prevCandleWidth = _candleWidth;\n _prevStartOffset = _startOffset;\n _initialFocalPoint = focalPoint;\n }\n\n _onScaleUpdate(double scale, Offset focalPoint, double w) {\n // Handle zoom\n final candleWidth = (_prevCandleWidth * scale)\n .clamp(_getMinCandleWidth(w), _getMaxCandleWidth(w));\n final clampedScale = candleWidth / _prevCandleWidth;\n var startOffset = _prevStartOffset * clampedScale;\n // Handle pan\n final dx = (focalPoint - _initialFocalPoint).dx * -1;\n startOffset += dx;\n // Adjust pan when zooming\n final double prevCount = w / _prevCandleWidth;\n final double currCount = w / candleWidth;\n final zoomAdjustment = (currCount - prevCount) * candleWidth;\n final focalPointFactor = focalPoint.dx / w;\n startOffset -= zoomAdjustment * focalPointFactor;\n startOffset = startOffset.clamp(0, _getMaxStartOffset(w, candleWidth));\n // Fire candle width resize event\n if (candleWidth != _candleWidth) {\n widget.onCandleResize?.call(candleWidth);\n }\n // Apply changes\n setState(() {\n _candleWidth = candleWidth;\n _startOffset = startOffset;\n });\n }\n\n _handleResize(double w) {\n if (w == _prevChartWidth) return;\n if (_prevChartWidth != null) {\n // Re-clamp when size changes (e.g. screen rotation)\n _candleWidth = _candleWidth.clamp(\n _getMinCandleWidth(w),\n _getMaxCandleWidth(w),\n );\n _startOffset = _startOffset.clamp(\n 0,\n _getMaxStartOffset(w, _candleWidth),\n );\n } else {\n // Default zoom level. Defaults to a 90 day chart, but configurable.\n // If data is shorter, we use the whole range.\n final count = min(\n widget.candles.length,\n widget.initialVisibleCandleCount,\n );\n _candleWidth = w / count;\n // Default show the latest available data, e.g. the most recent 90 days.\n _startOffset = (widget.candles.length - count) * _candleWidth;\n }\n _prevChartWidth = w;\n }\n\n // The narrowest candle width, i.e. when drawing all available data points.\n double _getMinCandleWidth(double w) => w / widget.candles.length;\n\n // The widest candle width, e.g. when drawing 14 day chart\n double _getMaxCandleWidth(double w) => w / min(14, widget.candles.length);\n\n // Max start offset: how far can we scroll towards the end of the chart\n double _getMaxStartOffset(double w, double candleWidth) {\n final count = w / candleWidth; // visible candles in the window\n final start = widget.candles.length - count;\n return max(0, candleWidth * start);\n }\n\n String defaultTimeLabel(int timestamp, int visibleDataCount) {\n final date = DateTime.fromMillisecondsSinceEpoch(timestamp)\n .toIso8601String()\n .split(\"T\")\n .first\n .split(\"-\");\n\n if (visibleDataCount > 20) {\n // If more than 20 data points are visible, we should show year and month.\n return \"${date[0]}-${date[1]}\"; // yyyy-mm\n } else {\n // Otherwise, we should show month and date.\n return \"${date[1]}-${date[2]}\"; // mm-dd\n }\n }\n\n String defaultPriceLabel(double price) => price.toStringAsFixed(2);\n\n Map defaultOverlayInfo(CandleData candle) {\n final date = intl.DateFormat.yMMMd()\n .format(DateTime.fromMillisecondsSinceEpoch(candle.timestamp));\n return {\n \"Date\": date,\n \"Open\": candle.open?.toStringAsFixed(2) ?? \"-\",\n \"High\": candle.high?.toStringAsFixed(2) ?? \"-\",\n \"Low\": candle.low?.toStringAsFixed(2) ?? \"-\",\n \"Close\": candle.close?.toStringAsFixed(2) ?? \"-\",\n \"Volume\": candle.volume?.asAbbreviated() ?? \"-\",\n };\n }\n\n void _fireOnTapEvent() {\n if (_prevParams == null || _tapPosition == null) return;\n final params = _prevParams!;\n final dx = _tapPosition!.dx;\n final selected = params.getCandleIndexFromOffset(dx);\n final candle = params.candles[selected];\n widget.onTap?.call(candle);\n }\n}\n\nextension Formatting on double {\n String asPercent() {\n final format = this < 100 ? \"##0.00\" : \"#,###\";\n final v = intl.NumberFormat(format, \"en_US\").format(this);\n return \"${this >= 0 ? '+' : ''}$v%\";\n }\n\n String asAbbreviated() {\n if (this < 1000) return this.toStringAsFixed(3);\n if (this >= 1e18) return this.toStringAsExponential(3);\n final s = intl.NumberFormat(\"#,###\", \"en_US\").format(this).split(\",\");\n const suffixes = [\"K\", \"M\", \"B\", \"T\", \"Q\"];\n return \"${s[0]}.${s[1]}${suffixes[s.length - 2]}\";\n }\n}\n" }, { "path": "lib/src/painter_params.dart", "content": "import 'dart:ui';\nimport 'package:flutter/widgets.dart';\n\nimport 'chart_style.dart';\nimport 'candle_data.dart';\n\nclass PainterParams {\n final List candles;\n final ChartStyle style;\n final Size size;\n final double candleWidth;\n final double startOffset;\n\n final double maxPrice;\n final double minPrice;\n final double maxVol;\n final double minVol;\n\n final double xShift;\n final Offset? tapPosition;\n final List? leadingTrends;\n final List? trailingTrends;\n\n PainterParams({\n required this.candles,\n required this.style,\n required this.size,\n required this.candleWidth,\n required this.startOffset,\n required this.maxPrice,\n required this.minPrice,\n required this.maxVol,\n required this.minVol,\n required this.xShift,\n required this.tapPosition,\n required this.leadingTrends,\n required this.trailingTrends,\n });\n\n double get chartWidth => // width without price labels\n size.width - style.priceLabelWidth;\n\n double get chartHeight => // height without time labels\n size.height - style.timeLabelHeight;\n\n double get volumeHeight => chartHeight * style.volumeHeightFactor;\n\n double get priceHeight => chartHeight - volumeHeight;\n\n int getCandleIndexFromOffset(double x) {\n final adjustedPos = x - xShift + candleWidth / 2;\n final i = adjustedPos ~/ candleWidth;\n return i;\n }\n\n double fitPrice(double y) =>\n priceHeight * (maxPrice - y) / (maxPrice - minPrice);\n\n double fitVolume(double y) {\n final gap = 12; // the gap between price bars and volume bars\n final baseAmount = 2; // display at least \"something\" for the lowest volume\n\n if (maxVol == minVol) {\n // Apparently max and min values (in the current visible range, at least)\n // are the same. It's likely they passed in a bunch of zeroes, because\n // they don't have real volume data or don't want to draw volumes.\n assert(() {\n if (style.volumeHeightFactor != 0) {\n print('If you do not want to show volumes, '\n 'make sure to set `volumeHeightFactor` (ChartStyle) to zero.');\n }\n return true;\n }());\n // Since they are equal, we just draw all volume bars as half height.\n return priceHeight + volumeHeight / 2;\n }\n\n final volGridSize = (volumeHeight - baseAmount - gap) / (maxVol - minVol);\n final vol = (y - minVol) * volGridSize;\n return volumeHeight - vol + priceHeight - baseAmount;\n }\n\n static PainterParams lerp(PainterParams a, PainterParams b, double t) {\n double lerpField(double getField(PainterParams p)) =>\n lerpDouble(getField(a), getField(b), t)!;\n return PainterParams(\n candles: b.candles,\n style: b.style,\n size: b.size,\n candleWidth: b.candleWidth,\n startOffset: b.startOffset,\n maxPrice: lerpField((p) => p.maxPrice),\n minPrice: lerpField((p) => p.minPrice),\n maxVol: lerpField((p) => p.maxVol),\n minVol: lerpField((p) => p.minVol),\n xShift: b.xShift,\n tapPosition: b.tapPosition,\n leadingTrends: b.leadingTrends,\n trailingTrends: b.trailingTrends,\n );\n }\n\n bool shouldRepaint(PainterParams other) {\n if (candles.length != other.candles.length) return true;\n\n if (size != other.size ||\n candleWidth != other.candleWidth ||\n startOffset != other.startOffset ||\n xShift != other.xShift) return true;\n\n if (maxPrice != other.maxPrice ||\n minPrice != other.minPrice ||\n maxVol != other.maxVol ||\n minVol != other.minVol) return true;\n\n if (tapPosition != other.tapPosition) return true;\n\n if (leadingTrends != other.leadingTrends ||\n trailingTrends != other.trailingTrends) return true;\n\n if (style != other.style) return true;\n\n return false;\n }\n}\n\nclass PainterParamsTween extends Tween {\n PainterParamsTween({\n PainterParams? begin,\n required PainterParams end,\n }) : super(begin: begin, end: end);\n\n @override\n PainterParams lerp(double t) => PainterParams.lerp(begin ?? end!, end!, t);\n}\n" }, { "path": "pubspec.yaml", "content": "name: interactive_chart\ndescription: A candlestick chart that supports hand gestures such as pinch-to-zoom and panning.\nversion: 0.3.6\nhomepage: https://github.com/h65wang/flutter-interactive-chart\n\nenvironment:\n sdk: \">=2.12.0 <4.0.0\"\n flutter: \">=2.0.0\"\n\ndependencies:\n flutter:\n sdk: flutter\n intl: \">=0.17.0 <0.21.0\"\n\ndev_dependencies:\n flutter_lints:\n flutter_test:\n sdk: flutter\n" } ]