creek

 1import 'package:flutter/material.dart';
 2import 'package:creekui/data/models/canvas_models.dart';
 3import 'package:creekui/ui/styles/variables.dart';
 4
 5class SelectionOverlayPainter extends CustomPainter {
 6  final Rect rect;
 7  final bool isResizing;
 8  final DragHandle activeHandle;
 9
10  SelectionOverlayPainter({
11    required this.rect,
12    this.isResizing = false,
13    this.activeHandle = DragHandle.none,
14  });
15
16  @override
17  void paint(Canvas canvas, Size size) {
18    // 1. Dim the rest of image
19    final backgroundPath =
20        Path()..addRect(Rect.fromLTWH(0, 0, size.width, size.height));
21    final selectionPath = Path()..addRect(rect);
22    final dimmedPath = Path.combine(
23      PathOperation.difference,
24      backgroundPath,
25      selectionPath,
26    );
27
28    final dimPaint =
29        Paint()
30          ..color = Colors.black.withOpacity(0.5)
31          ..style = PaintingStyle.fill;
32
33    canvas.drawPath(dimmedPath, dimPaint);
34
35    // 2. Draw Selection Border
36    final paint =
37        Paint()
38          ..color = Variables.selectionBorder
39          ..style = PaintingStyle.stroke
40          ..strokeWidth = 2.0;
41
42    // Use a dash effect for the selection box
43    _drawDashedRect(canvas, rect, paint);
44
45    // 3. If Resizing, Draw Handles
46    if (isResizing) {
47      final handlePaint =
48          Paint()
49            ..color = Colors.white
50            ..style = PaintingStyle.fill;
51
52      final handleBorderPaint =
53          Paint()
54            ..color = Variables.selectionBorder
55            ..style = PaintingStyle.stroke
56            ..strokeWidth = 2.0;
57
58      final double handleRadius = 6.0;
59
60      final handles = [
61        rect.topLeft,
62        rect.topRight,
63        rect.bottomLeft,
64        rect.bottomRight,
65      ];
66
67      for (final handle in handles) {
68        canvas.drawCircle(handle, handleRadius, handlePaint);
69        canvas.drawCircle(handle, handleRadius, handleBorderPaint);
70      }
71
72      // 4. Draw Center Handle (Move)
73      final centerPaint =
74          Paint()
75            ..color = Variables.accentMagic.withOpacity(0.5)
76            ..style = PaintingStyle.fill;
77
78      canvas.drawCircle(rect.center, 8.0, centerPaint);
79    }
80  }
81
82  void _drawDashedRect(Canvas canvas, Rect rect, Paint paint) {
83    final path = Path()..addRect(rect);
84    canvas.drawPath(path, paint);
85  }
86
87  @override
88  bool shouldRepaint(covariant SelectionOverlayPainter oldDelegate) {
89    return oldDelegate.rect != rect ||
90        oldDelegate.isResizing != isResizing ||
91        oldDelegate.activeHandle != activeHandle;
92  }
93}