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feat: Enable/disable camera flash (openfoodfacts#2196)
* Enable/disable camera flash * Add missing type * Update user_preferences.dart * Update user_preferences.dart Co-authored-by: Pierre Slamich <pierre@openfoodfacts.org> Co-authored-by: Pierre Slamich <pierre.slamich@gmail.com>
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Jun 7, 2022
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150 changes: 150 additions & 0 deletions
150
packages/smooth_app/lib/pages/scan/scan_flash_toggle.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| import 'package:flutter/material.dart'; | ||
| import 'package:flutter/services.dart'; | ||
| import 'package:flutter_gen/gen_l10n/app_localizations.dart'; | ||
| import 'package:provider/provider.dart'; | ||
| import 'package:smooth_app/data_models/user_preferences.dart'; | ||
| import 'package:smooth_app/generic_lib/design_constants.dart'; | ||
| import 'package:smooth_app/helpers/camera_helper.dart'; | ||
|
|
||
| class ScannerFlashToggleWidget extends StatelessWidget { | ||
| const ScannerFlashToggleWidget({Key? key}) : super(key: key); | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| final AppLocalizations appLocalizations = AppLocalizations.of(context); | ||
|
|
||
| return Selector<UserPreferences, bool>( | ||
| selector: (_, UserPreferences prefs) => prefs.useFlashWithCamera, | ||
| builder: (BuildContext context, bool value, _) { | ||
| return Tooltip( | ||
| message: value | ||
| ? appLocalizations.camera_disable_flash | ||
| : appLocalizations.camera_enable_flash, | ||
| decoration: BoxDecoration( | ||
| color: value ? Colors.red : Colors.green, | ||
| borderRadius: ANGULAR_BORDER_RADIUS, | ||
| ), | ||
| child: InkWell( | ||
| customBorder: const CircleBorder(), | ||
| child: Padding( | ||
| padding: const EdgeInsets.symmetric( | ||
| horizontal: 6.0, | ||
| vertical: 8.0, | ||
| ), | ||
| child: Icon( | ||
| value ? Icons.flash_on : Icons.flash_off, | ||
| size: 20.0, | ||
| color: Colors.white, | ||
| ), | ||
| ), | ||
| onTap: () async { | ||
| await HapticFeedback.selectionClick(); | ||
| await CameraHelper.controller?.enableFlash(!value); | ||
| }, | ||
| ), | ||
| ); | ||
| }); | ||
| } | ||
|
|
||
| /// Returns the Size of the visor | ||
| static Size getSize(BuildContext context) => Size( | ||
| MediaQuery.of(context).size.width * 0.8, | ||
| 150.0, | ||
| ); | ||
| } | ||
|
|
||
| class ScanVisorPainter extends CustomPainter { | ||
| ScanVisorPainter(); | ||
|
|
||
| static const double strokeWidth = 3.0; | ||
| static const double _fullCornerSize = 31.0; | ||
| static const double _halfCornerSize = _fullCornerSize / 2; | ||
| static const Radius _borderRadius = Radius.circular(_halfCornerSize); | ||
|
|
||
| final Paint _paint = Paint() | ||
| ..strokeWidth = strokeWidth | ||
| ..color = Colors.white | ||
| ..style = PaintingStyle.stroke; | ||
|
|
||
| @override | ||
| void paint(Canvas canvas, Size size) { | ||
| final Rect rect = Rect.fromLTRB(0.0, 0.0, size.width, size.height); | ||
| canvas.drawPath(getPath(rect, false), _paint); | ||
| } | ||
|
|
||
| @override | ||
| bool shouldRepaint(CustomPainter oldDelegate) => false; | ||
|
|
||
| /// Returns a path to draw the visor | ||
| /// [includeLineBetweenCorners] will draw lines between each corner, instead | ||
| /// of moving the cursor | ||
| static Path getPath(Rect rect, bool includeLineBetweenCorners) { | ||
| final double bottomPosition; | ||
| if (includeLineBetweenCorners) { | ||
| bottomPosition = rect.bottom - strokeWidth; | ||
| } else { | ||
| bottomPosition = rect.bottom; | ||
| } | ||
|
|
||
| final Path path = Path() | ||
| // Top left | ||
| ..moveTo(rect.left, rect.top + _fullCornerSize) | ||
| ..lineTo(rect.left, rect.top + _halfCornerSize) | ||
| ..arcToPoint( | ||
| Offset(rect.left + _halfCornerSize, rect.top), | ||
| radius: _borderRadius, | ||
| ) | ||
| ..lineTo(rect.left + _fullCornerSize, rect.top); | ||
|
|
||
| // Top right | ||
| if (includeLineBetweenCorners) { | ||
| path.lineTo(rect.right - _fullCornerSize, rect.top); | ||
| } else { | ||
| path.moveTo(rect.right - _fullCornerSize, rect.top); | ||
| } | ||
|
|
||
| path | ||
| ..lineTo(rect.right - _halfCornerSize, rect.top) | ||
| ..arcToPoint( | ||
| Offset(rect.right, _halfCornerSize), | ||
| radius: _borderRadius, | ||
| ) | ||
| ..lineTo(rect.right, rect.top + _fullCornerSize); | ||
|
|
||
| // Bottom right | ||
| if (includeLineBetweenCorners) { | ||
| path.lineTo(rect.right, bottomPosition - _fullCornerSize); | ||
| } else { | ||
| path.moveTo(rect.right, bottomPosition - _fullCornerSize); | ||
| } | ||
|
|
||
| path | ||
| ..lineTo(rect.right, bottomPosition - _halfCornerSize) | ||
| ..arcToPoint( | ||
| Offset(rect.right - _halfCornerSize, bottomPosition), | ||
| radius: _borderRadius, | ||
| ) | ||
| ..lineTo(rect.right - _fullCornerSize, bottomPosition); | ||
|
|
||
| // Bottom left | ||
| if (includeLineBetweenCorners) { | ||
| path.lineTo(rect.left + _fullCornerSize, bottomPosition); | ||
| } else { | ||
| path.moveTo(rect.left + _fullCornerSize, bottomPosition); | ||
| } | ||
|
|
||
| path | ||
| ..lineTo(rect.left + _halfCornerSize, bottomPosition) | ||
| ..arcToPoint( | ||
| Offset(rect.left, bottomPosition - _halfCornerSize), | ||
| radius: _borderRadius, | ||
| ) | ||
| ..lineTo(rect.left, bottomPosition - _fullCornerSize); | ||
|
|
||
| if (includeLineBetweenCorners) { | ||
| path.lineTo(rect.left, rect.top + _halfCornerSize); | ||
| } | ||
|
|
||
| return path; | ||
| } | ||
| } |
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