51 lines
1.3 KiB
Dart
51 lines
1.3 KiB
Dart
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import 'package:flutter/material.dart';
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import 'guide_frame.dart';
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/// Circular shooting guide overlay.
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class GuideOverlay extends StatelessWidget {
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const GuideOverlay({super.key, required this.size});
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final Size size;
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@override
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Widget build(BuildContext context) {
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return CustomPaint(
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size: size,
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painter: _GuidePainter(),
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);
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}
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}
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class _GuidePainter extends CustomPainter {
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@override
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void paint(Canvas canvas, Size size) {
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final rect = GuideFrame.inViewport(size);
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final dim = Paint()..color = Colors.black.withOpacity(0.45);
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final path = Path()
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..addRect(Offset.zero & size)
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..addOval(rect)
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..fillType = PathFillType.evenOdd;
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canvas.drawPath(path, dim);
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final border = Paint()
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..style = PaintingStyle.stroke
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..strokeWidth = 2
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..color = Colors.white70;
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canvas.drawOval(rect, border);
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// Crosshair ticks
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final tick = Paint()
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..style = PaintingStyle.stroke
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..strokeWidth = 2
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..color = const Color(0xFFEAB308);
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final c = rect.center;
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const len = 14.0;
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canvas.drawLine(Offset(c.dx - len, c.dy), Offset(c.dx + len, c.dy), tick);
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canvas.drawLine(Offset(c.dx, c.dy - len), Offset(c.dx, c.dy + len), tick);
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}
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@override
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bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
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}
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