| 1 | import 'dart:math'; |
| 2 | import 'dart:ui'; |
| 3 | |
| 4 | import 'package:cake_wallet/entities/qr_scanner.dart'; |
| 5 | import 'package:cake_wallet/generated/i18n.dart'; |
| 6 | import 'package:cake_wallet/new-ui/widgets/modern_button.dart'; |
| 7 | import 'package:cake_wallet/new-ui/widgets/receive_page/receive_top_bar.dart'; |
| 8 | import 'package:cake_wallet/new-ui/widgets/scan_page/network_list.dart'; |
| 9 | import 'package:cake_wallet/new-ui/widgets/send_page/floating_icon_button.dart'; |
| 10 | import 'package:cake_wallet/src/widgets/alert_with_one_action.dart'; |
| 11 | import 'package:cake_wallet/utils/show_pop_up.dart'; |
| 12 | import 'package:cw_core/utils/print_verbose.dart'; |
| 13 | import 'package:fast_scanner/fast_scanner.dart'; |
| 14 | import 'package:flutter/material.dart'; |
| 15 | import 'package:flutter/scheduler.dart'; |
| 16 | import 'package:flutter/services.dart'; |
| 17 | import 'package:ur/ur_decoder.dart'; |
| 18 | |
| 19 | class ScanPage extends StatefulWidget { |
| 20 | const ScanPage({super.key, this.showHelp = false, this.showManualInput = true}); |
| 21 | |
| 22 | final bool showHelp; |
| 23 | final bool showManualInput; |
| 24 | |
| 25 | @override |
| 26 | State<ScanPage> createState() => _ScanPageState(); |
| 27 | } |
| 28 | |
| 29 | class _ScanPageState extends State<ScanPage> { |
| 30 | final MobileScannerController controller = MobileScannerController(); |
| 31 | int? _numCameras; |
| 32 | bool _frontFlashMode = false; |
| 33 | bool _textInputMode = false; |
| 34 | final TextEditingController textController = TextEditingController(); |
| 35 | final FocusNode textFocusNode = FocusNode(); |
| 36 | List<String> urCodes = []; |
| 37 | late var ur = URQRToURQRData(urCodes); |
| 38 | final decoder = URDecoder(); |
| 39 | bool popped = false; |
| 40 | Barcode? _barcode; |
| 41 | |
| 42 | @override |
| 43 | void initState() { |
| 44 | super.initState(); |
| 45 | controller.addListener(() { |
| 46 | if (mounted) { |
| 47 | setState(() { |
| 48 | _numCameras = controller.value.availableCameras; |
| 49 | }); |
| 50 | } |
| 51 | }); |
| 52 | } |
| 53 | |
| 54 | @override |
| 55 | void dispose() { |
| 56 | controller.dispose(); |
| 57 | textController.dispose(); |
| 58 | textFocusNode.dispose(); |
| 59 | super.dispose(); |
| 60 | } |
| 61 | |
| 62 | @override |
| 63 | Widget build(BuildContext context) { |
| 64 | final double cutoutSize = MediaQuery.of(context).size.width * 0.8; |
| 65 | const double cutoutRadius = 24.0; |
| 66 | const Duration textModeSwitchDuration = Duration(milliseconds: 300); |
| 67 | final buttonColor = _frontFlashMode ? Colors.black.withAlpha(40) : Colors.white.withAlpha(40); |
| 68 | final buttonIconColor = _frontFlashMode ? Colors.black : Colors.white; |
| 69 | final isScanningURQR = decoder.processedPartsCount() > 0; |
| 70 | final double targetRadius = isScanningURQR ? (cutoutSize / 2) : cutoutRadius; |
| 71 | |
| 72 | return Material( |
| 73 | child: Stack( |
| 74 | children: [ |
| 75 | MobileScanner( |
| 76 | controller: controller, |
| 77 | onDetect: _handleBarcode, |
| 78 | ), |
| 79 | // A full screen tap target would otherwise show up as one giant unlabeled |
| 80 | // node; leaving text mode is also possible with the back button. |
| 81 | Positioned.fill( |
| 82 | child: ExcludeSemantics( |
| 83 | child: GestureDetector( |
| 84 | onTap: () => setState(() { |
| 85 | _textInputMode = false; |
| 86 | }), |
| 87 | child: RepaintBoundary( |
| 88 | child: AnimatedSwitcher( |
| 89 | switchInCurve: Curves.easeOutCubic, |
| 90 | switchOutCurve: Curves.easeInQuad, |
| 91 | duration: textModeSwitchDuration, |
| 92 | child: _textInputMode |
| 93 | ? BackdropFilter( |
| 94 | key: ValueKey(1), |
| 95 | filter: ImageFilter.blur(sigmaX: 8.0, sigmaY: 8.0), |
| 96 | child: Container( |
| 97 | color: _frontFlashMode ? Colors.white : Colors.black.withAlpha(153), |
| 98 | ), |
| 99 | ) |
| 100 | : TweenAnimationBuilder<double>( |
| 101 | key: const ValueKey(0), |
| 102 | tween: Tween<double>(begin: 0.0, end: targetRadius), |
| 103 | duration: const Duration(milliseconds: 500), |
| 104 | curve: Curves.easeOutCubic, |
| 105 | child: BackdropFilter( |
| 106 | filter: ImageFilter.blur(sigmaX: 8.0, sigmaY: 8.0), |
| 107 | child: Container( |
| 108 | color: _frontFlashMode ? Colors.white : Colors.black.withAlpha(153), |
| 109 | ), |
| 110 | ), |
| 111 | builder: (context, radius, child) { |
| 112 | return ClipPath( |
| 113 | clipper: HoleClipper( |
| 114 | width: cutoutSize, |
| 115 | height: cutoutSize, |
| 116 | radius: radius, |
| 117 | ), |
| 118 | child: child, |
| 119 | ); |
| 120 | }, |
| 121 | ), |
| 122 | ), |
| 123 | ), |
| 124 | ), |
| 125 | ), |
| 126 | ), |
| 127 | AnimatedOpacity( |
| 128 | opacity: _textInputMode || isScanningURQR ? 0 : 1, |
| 129 | duration: textModeSwitchDuration, |
| 130 | child: TweenAnimationBuilder<double>( |
| 131 | tween: Tween<double>(begin: 0.0, end: targetRadius), |
| 132 | duration: const Duration(milliseconds: 500), |
| 133 | curve: Curves.easeOutCubic, |
| 134 | builder: (context, radius, child) => Center( |
| 135 | child: Container( |
| 136 | width: cutoutSize, |
| 137 | height: cutoutSize, |
| 138 | decoration: BoxDecoration( |
| 139 | border: Border.all(color: Colors.white, width: 4.0), |
| 140 | borderRadius: BorderRadius.circular(radius), |
| 141 | ), |
| 142 | ), |
| 143 | ), |
| 144 | ), |
| 145 | ), |
| 146 | SafeArea( |
| 147 | child: Column( |
| 148 | children: [ |
| 149 | ModalTopBar( |
| 150 | title: "", |
| 151 | trailingWidget: AnimatedOpacity( |
| 152 | duration: textModeSwitchDuration, |
| 153 | opacity: _textInputMode ? 0 : 1, |
| 154 | child: Row( |
| 155 | spacing: 8, |
| 156 | children: [ |
| 157 | if ((_numCameras ?? 0) > 1) |
| 158 | ModernButton.svg( |
| 159 | size: 36, |
| 160 | iconSize: 24, |
| 161 | svgPath: "assets/new-ui/camera_flip.svg", |
| 162 | onPressed: () { |
| 163 | controller.switchCamera(); |
| 164 | setState(() { |
| 165 | _frontFlashMode = false; |
| 166 | }); |
| 167 | }, |
| 168 | iconColor: buttonIconColor, |
| 169 | backgroundColor: buttonColor, |
| 170 | semanticLabel: S.of(context).switch_camera, |
| 171 | ), |
| 172 | ModernButton( |
| 173 | size: 36, |
| 174 | iconSize: 24, |
| 175 | icon: Icon( |
| 176 | (controller.value.torchState == TorchState.on || _frontFlashMode) |
| 177 | ? Icons.flash_off_outlined |
| 178 | : Icons.flash_on), |
| 179 | semanticLabel: |
| 180 | (controller.value.torchState == TorchState.on || _frontFlashMode) |
| 181 | ? S.of(context).turn_flash_off |
| 182 | : S.of(context).turn_flash_on, |
| 183 | onPressed: () { |
| 184 | if (controller.value.cameraDirection == CameraFacing.front) { |
| 185 | setState(() { |
| 186 | _frontFlashMode = !_frontFlashMode; |
| 187 | }); |
| 188 | } else { |
| 189 | controller.toggleTorch(); |
| 190 | } |
| 191 | }, |
| 192 | iconColor: buttonIconColor, |
| 193 | backgroundColor: buttonColor, |
| 194 | ), |
| 195 | ], |
| 196 | ), |
| 197 | ), |
| 198 | leadingWidget: Row( |
| 199 | textBaseline: TextBaseline.ideographic, |
| 200 | spacing: 24, |
| 201 | children: [ |
| 202 | ModernButton( |
| 203 | size: 36, |
| 204 | iconSize: 18, |
| 205 | icon: Icon(Icons.arrow_back_ios_new), |
| 206 | semanticLabel: S.of(context).seed_alert_back, |
| 207 | onPressed: () { |
| 208 | if (_textInputMode) { |
| 209 | setState(() { |
| 210 | _textInputMode = false; |
| 211 | }); |
| 212 | } else { |
| 213 | Navigator.of(context).pop(); |
| 214 | } |
| 215 | }, |
| 216 | iconColor: buttonIconColor, |
| 217 | backgroundColor: buttonColor, |
| 218 | ), |
| 219 | Text( |
| 220 | S.of(context).scan, |
| 221 | style: TextStyle( |
| 222 | fontSize: 18, fontWeight: FontWeight.w600, color: buttonIconColor), |
| 223 | ) |
| 224 | ], |
| 225 | ), |
| 226 | ) |
| 227 | ], |
| 228 | ), |
| 229 | ), |
| 230 | Positioned( |
| 231 | bottom: 18 + |
| 232 | max(MediaQuery.of(context).viewInsets.bottom, |
| 233 | MediaQuery.of(context).viewPadding.bottom), |
| 234 | left: 16, |
| 235 | right: 16, |
| 236 | child: RepaintBoundary( |
| 237 | child: AnimatedOpacity( |
| 238 | opacity: _textInputMode ? 1 : 0, |
| 239 | duration: textModeSwitchDuration, |
| 240 | child: Container( |
| 241 | decoration: BoxDecoration( |
| 242 | color: Theme.of(context).colorScheme.surfaceContainer, |
| 243 | borderRadius: BorderRadius.circular(18)), |
| 244 | child: Row( |
| 245 | spacing: 10, |
| 246 | children: [ |
| 247 | Expanded( |
| 248 | child: MergeSemantics( |
| 249 | child: Semantics( |
| 250 | label: S.of(context).enter_code, |
| 251 | child: TextField( |
| 252 | enabled: _textInputMode, |
| 253 | controller: textController, |
| 254 | focusNode: textFocusNode, |
| 255 | onSubmitted: (val) { |
| 256 | if (val.isNotEmpty) { |
| 257 | Navigator.of(context).pop(val); |
| 258 | } else { |
| 259 | setState(() { |
| 260 | _textInputMode = false; |
| 261 | }); |
| 262 | } |
| 263 | }, |
| 264 | decoration: InputDecoration(hintText: S.of(context).enter_code), |
| 265 | ), |
| 266 | ), |
| 267 | ), |
| 268 | ), |
| 269 | FloatingIconButton( |
| 270 | iconPath: "assets/new-ui/paste.svg", |
| 271 | semanticLabel: S.of(context).paste, |
| 272 | onPressed: () async { |
| 273 | final data = await Clipboard.getData("text/plain"); |
| 274 | if (data?.text != null) { |
| 275 | textController.text = data!.text!; |
| 276 | } |
| 277 | }), |
| 278 | SizedBox( |
| 279 | width: 2, |
| 280 | ) |
| 281 | ], |
| 282 | ), |
| 283 | ), |
| 284 | ), |
| 285 | ), |
| 286 | ), |
| 287 | Positioned( |
| 288 | bottom: 120, |
| 289 | left: 0, |
| 290 | right: 0, |
| 291 | child: RepaintBoundary( |
| 292 | child: AnimatedOpacity( |
| 293 | duration: textModeSwitchDuration, |
| 294 | opacity: _textInputMode ? 0 : 1, |
| 295 | child: Row( |
| 296 | mainAxisAlignment: MainAxisAlignment.center, |
| 297 | spacing: 8, |
| 298 | children: [ |
| 299 | // "not mvp" |
| 300 | // ScanPageButton( |
| 301 | // onTap: () async { |
| 302 | // FilePickerResult? res = await FilePicker.platform.pickFiles( |
| 303 | // type: FileType.image, |
| 304 | // allowMultiple: false, |
| 305 | // withData: false, |
| 306 | // ); |
| 307 | // |
| 308 | // if (res != null && res.paths.isNotEmpty && res.paths.first != null) { |
| 309 | // final capture = await controller.analyzeImage(res.paths.first!); |
| 310 | // if (capture != null) { |
| 311 | // _handleBarcode(capture); |
| 312 | // } |
| 313 | // } |
| 314 | // }, |
| 315 | // icon: Icons.photo_outlined, |
| 316 | // label: S.of(context).gallery, |
| 317 | // buttonColor: buttonColor, |
| 318 | // buttonIconColor: buttonIconColor), |
| 319 | if (widget.showManualInput) |
| 320 | ScanPageButton( |
| 321 | onTap: () { |
| 322 | setState(() { |
| 323 | _textInputMode = true; |
| 324 | }); |
| 325 | Future.delayed(textModeSwitchDuration) |
| 326 | .then((val) => textFocusNode.requestFocus()); |
| 327 | }, |
| 328 | icon: Icons.edit_outlined, |
| 329 | label: S.of(context).manual_input, |
| 330 | buttonColor: buttonColor, |
| 331 | buttonIconColor: buttonIconColor), |
| 332 | if (widget.showHelp) |
| 333 | ScanPageButton( |
| 334 | onTap: () async { |
| 335 | if (_textInputMode) return; |
| 336 | try { |
| 337 | controller.stop(); |
| 338 | await showModalBottomSheet( |
| 339 | context: context, |
| 340 | isScrollControlled: true, |
| 341 | useSafeArea: true, |
| 342 | backgroundColor: Theme.of(context).colorScheme.surface, |
| 343 | builder: (context) => ScanPageNetworkList()); |
| 344 | } finally { |
| 345 | controller.start(); |
| 346 | } |
| 347 | }, |
| 348 | icon: Icons.question_mark, |
| 349 | semanticsLabel: S.of(context).help, |
| 350 | buttonColor: buttonColor, |
| 351 | buttonIconColor: buttonIconColor) |
| 352 | ], |
| 353 | ), |
| 354 | ), |
| 355 | )), |
| 356 | AnimatedOpacity( |
| 357 | duration: Duration(milliseconds: 500), |
| 358 | opacity: isScanningURQR ? 1 : 0, |
| 359 | child: Center( |
| 360 | child: SegmentedCircularProgress( |
| 361 | progress: URQrProgress( |
| 362 | expectedPartCount: decoder.expectedPartCount() ?? 0, |
| 363 | processedPartsCount: decoder.processedPartsCount(), |
| 364 | receivedPartIndexes: decoder.receivedPartIndexes().toList(), |
| 365 | percentage: decoder.estimatedPercentComplete(), |
| 366 | ), |
| 367 | size: cutoutSize + 20, |
| 368 | activeColor: Theme.of(context).colorScheme.primary, |
| 369 | inactiveColor: Colors.white.withAlpha(102)), |
| 370 | ), |
| 371 | ), |
| 372 | Positioned( |
| 373 | bottom: 120, |
| 374 | left: 0, |
| 375 | right: 0, |
| 376 | child: IgnorePointer( |
| 377 | child: AnimatedOpacity( |
| 378 | duration: Duration(milliseconds: 500), |
| 379 | opacity: isScanningURQR ? 1 : 0, |
| 380 | // Three separate digits mean nothing on their own: announce the progress |
| 381 | // as one node, and only while a multi part code is actually being scanned. |
| 382 | child: ExcludeSemantics( |
| 383 | excluding: !isScanningURQR, |
| 384 | child: Semantics( |
| 385 | container: true, |
| 386 | liveRegion: true, |
| 387 | label: S.of(context).qr_parts_scanned( |
| 388 | "${decoder.processedPartsCount()}", "${decoder.expectedPartCount() ?? 0}"), |
| 389 | excludeSemantics: true, |
| 390 | child: Row( |
| 391 | mainAxisAlignment: MainAxisAlignment.center, |
| 392 | children: [ |
| 393 | Text( |
| 394 | "${decoder.processedPartsCount()}", |
| 395 | style: TextStyle( |
| 396 | fontSize: 45, |
| 397 | fontWeight: FontWeight.w500, |
| 398 | color: Theme.of(context).colorScheme.primary), |
| 399 | ), |
| 400 | Text( |
| 401 | "/", |
| 402 | style: TextStyle( |
| 403 | fontSize: 45, color: Theme.of(context).colorScheme.onSurfaceVariant), |
| 404 | ), |
| 405 | Text( |
| 406 | "${decoder.expectedPartCount()}", |
| 407 | style: TextStyle( |
| 408 | fontSize: 45, color: Theme.of(context).colorScheme.onSurface), |
| 409 | ), |
| 410 | ], |
| 411 | ), |
| 412 | ), |
| 413 | ), |
| 414 | ), |
| 415 | ), |
| 416 | ) |
| 417 | ], |
| 418 | ), |
| 419 | ); |
| 420 | } |
| 421 | |
| 422 | void _handleBarcode(BarcodeCapture barcodes) { |
| 423 | try { |
| 424 | _handleBarcodeInternal(barcodes); |
| 425 | } catch (e, st) { |
| 426 | showPopUp<void>( |
| 427 | context: context, |
| 428 | builder: (context) { |
| 429 | return AlertWithOneAction( |
| 430 | alertTitle: S.of(context).error, |
| 431 | alertContent: S.of(context).error_dialog_content, |
| 432 | buttonText: S.of(context).ok, |
| 433 | buttonAction: () { |
| 434 | Navigator.of(context).pop(); |
| 435 | }, |
| 436 | ); |
| 437 | }, |
| 438 | ); |
| 439 | printV("$e\n$st"); |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | void _handleBarcodeInternal(BarcodeCapture barcodes) { |
| 444 | for (final barcode in barcodes.barcodes) { |
| 445 | if (barcode.rawValue?.trim().isEmpty ?? false == false) continue; |
| 446 | if (barcode.rawValue!.startsWith("ur:")) { |
| 447 | if (urCodes.contains(barcode.rawValue)) continue; |
| 448 | decoder.receivePart(barcode.rawValue!); |
| 449 | setState(() { |
| 450 | urCodes.add(barcode.rawValue!); |
| 451 | ur = URQRToURQRData(urCodes); |
| 452 | }); |
| 453 | if (decoder.estimatedPercentComplete() == 1) { |
| 454 | setState(() { |
| 455 | popped = true; |
| 456 | }); |
| 457 | SchedulerBinding.instance.addPostFrameCallback((_) { |
| 458 | Navigator.of(context).pop(ur.inputs.join("\n")); |
| 459 | }); |
| 460 | } |
| 461 | ; |
| 462 | } |
| 463 | } |
| 464 | if (urCodes.isNotEmpty) return; |
| 465 | if (mounted) { |
| 466 | setState(() { |
| 467 | _barcode = barcodes.barcodes.firstOrNull; |
| 468 | }); |
| 469 | if (_barcode != null && popped != true) { |
| 470 | setState(() { |
| 471 | popped = true; |
| 472 | }); |
| 473 | Navigator.of(context).pop(_barcode!.rawValue ?? _barcode!.rawBytes); |
| 474 | } |
| 475 | } |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | class ScanPageButton extends StatelessWidget { |
| 480 | const ScanPageButton( |
| 481 | {super.key, |
| 482 | required this.onTap, |
| 483 | required this.icon, |
| 484 | this.label, |
| 485 | this.semanticsLabel, |
| 486 | required this.buttonColor, |
| 487 | required this.buttonIconColor}); |
| 488 | |
| 489 | final VoidCallback onTap; |
| 490 | final IconData icon; |
| 491 | final String? label; |
| 492 | |
| 493 | /// Name for the icon-only variant, which has no visible [label]. |
| 494 | final String? semanticsLabel; |
| 495 | final Color buttonColor; |
| 496 | final Color buttonIconColor; |
| 497 | |
| 498 | @override |
| 499 | Widget build(BuildContext context) { |
| 500 | return Semantics( |
| 501 | button: true, |
| 502 | enabled: true, |
| 503 | label: semanticsLabel ?? label, |
| 504 | onTap: onTap, |
| 505 | excludeSemantics: true, |
| 506 | child: GestureDetector( |
| 507 | onTap: onTap, |
| 508 | behavior: HitTestBehavior.opaque, |
| 509 | child: Container( |
| 510 | decoration: |
| 511 | BoxDecoration(color: buttonColor, borderRadius: BorderRadius.circular(99999)), |
| 512 | child: Padding( |
| 513 | padding: EdgeInsets.only( |
| 514 | top: 10, |
| 515 | bottom: 10, |
| 516 | left: label == null ? 10 : 16, |
| 517 | right: label == null ? 10 : 20), |
| 518 | child: Row( |
| 519 | spacing: 10, |
| 520 | children: [ |
| 521 | Icon(icon, size: 28, color: buttonIconColor), |
| 522 | if (label != null) |
| 523 | Text(label!, |
| 524 | style: TextStyle( |
| 525 | fontSize: 16, fontWeight: FontWeight.w500, color: buttonIconColor)) |
| 526 | ], |
| 527 | ), |
| 528 | ), |
| 529 | ))); |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | class HoleClipper extends CustomClipper<Path> { |
| 534 | final double width; |
| 535 | final double height; |
| 536 | final double radius; |
| 537 | |
| 538 | HoleClipper({ |
| 539 | required this.width, |
| 540 | required this.height, |
| 541 | required this.radius, |
| 542 | }); |
| 543 | |
| 544 | @override |
| 545 | Path getClip(Size size) { |
| 546 | final Path fullScreenPath = Path()..addRect(Rect.fromLTWH(0, 0, size.width, size.height)); |
| 547 | |
| 548 | final Path cutoutPath = Path() |
| 549 | ..addRRect( |
| 550 | RRect.fromRectAndRadius( |
| 551 | Rect.fromCenter( |
| 552 | center: Offset(size.width / 2, size.height / 2), |
| 553 | width: width, |
| 554 | height: height, |
| 555 | ), |
| 556 | Radius.circular(radius), |
| 557 | ), |
| 558 | ); |
| 559 | |
| 560 | return Path.combine( |
| 561 | PathOperation.difference, |
| 562 | fullScreenPath, |
| 563 | cutoutPath, |
| 564 | ); |
| 565 | } |
| 566 | |
| 567 | @override |
| 568 | bool shouldReclip(covariant HoleClipper oldClipper) { |
| 569 | return oldClipper.width != width || oldClipper.height != height || oldClipper.radius != radius; |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | class SegmentedCircularProgress extends StatelessWidget { |
| 574 | final URQrProgress progress; |
| 575 | final Color activeColor; |
| 576 | final Color inactiveColor; |
| 577 | final double size; |
| 578 | |
| 579 | const SegmentedCircularProgress({ |
| 580 | Key? key, |
| 581 | required this.progress, |
| 582 | required this.activeColor, |
| 583 | required this.inactiveColor, |
| 584 | required this.size, |
| 585 | }) : super(key: key); |
| 586 | |
| 587 | @override |
| 588 | Widget build(BuildContext context) { |
| 589 | return CustomPaint( |
| 590 | size: Size(size, size), |
| 591 | painter: _SegmentedCirclePainter( |
| 592 | progress: progress, |
| 593 | activeColor: activeColor, |
| 594 | inactiveColor: inactiveColor, |
| 595 | ), |
| 596 | ); |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | class _SegmentedCirclePainter extends CustomPainter { |
| 601 | final URQrProgress progress; |
| 602 | static const double strokeWidth = 10; |
| 603 | static const double gapAngle = 0.08; |
| 604 | final Color activeColor; |
| 605 | final Color inactiveColor; |
| 606 | |
| 607 | _SegmentedCirclePainter({ |
| 608 | required this.progress, |
| 609 | required this.activeColor, |
| 610 | required this.inactiveColor, |
| 611 | }); |
| 612 | |
| 613 | @override |
| 614 | void paint(Canvas canvas, Size size) { |
| 615 | final rect = Rect.fromLTWH(0, 0, size.width, size.height); |
| 616 | final totalSegments = progress.expectedPartCount; |
| 617 | |
| 618 | final sweepAngle = (2 * pi - (gapAngle * totalSegments)) / totalSegments; |
| 619 | |
| 620 | final paint = Paint() |
| 621 | ..style = PaintingStyle.stroke |
| 622 | ..strokeWidth = strokeWidth |
| 623 | ..strokeCap = StrokeCap.butt; |
| 624 | |
| 625 | double startAngle = -pi / 2 + (gapAngle / 2); |
| 626 | |
| 627 | for (int i = 0; i < totalSegments; i++) { |
| 628 | bool isHighlighted = progress.receivedPartIndexes.contains(i); |
| 629 | |
| 630 | paint.color = isHighlighted ? activeColor : inactiveColor; |
| 631 | |
| 632 | canvas.drawArc(rect, startAngle, sweepAngle, false, paint); |
| 633 | |
| 634 | startAngle += sweepAngle + gapAngle; |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | @override |
| 639 | bool shouldRepaint(covariant _SegmentedCirclePainter oldDelegate) { |
| 640 | return !oldDelegate.progress.equals(progress) || |
| 641 | oldDelegate.progress.expectedPartCount != progress.expectedPartCount; |
| 642 | } |
| 643 | } |