canvasObjectFromJson function

CanvasObject canvasObjectFromJson(Map<String, Object?> json)

Creates a retained canvas object from JSON.

Implementation

CanvasObject canvasObjectFromJson(Map<String, Object?> json) {
  final paint = json['paint'] is Map
      ? CanvasPaint.fromJson(Map<String, Object?>.from(json['paint'] as Map))
      : const CanvasPaint();
  final id = json['id']?.toString();
  final name = json['name']?.toString();
  final locked = json['locked'] == true;
  final hidden = json['hidden'] == true;
  return switch (json['type']?.toString()) {
    'rect' => CanvasRect(
        id: id,
        name: name,
        paint: paint,
        rotation: _toDouble(json['rotation']),
        locked: locked,
        hidden: hidden,
        x: _toDouble(json['x']),
        y: _toDouble(json['y']),
        width: _toDouble(json['width']),
        height: _toDouble(json['height']),
        borderRadius: _toDouble(json['borderRadius']),
      ),
    'line' => CanvasLine(
        id: id,
        name: name,
        paint: paint,
        rotation: _toDouble(json['rotation']),
        locked: locked,
        hidden: hidden,
        x1: _toDouble(json['x1']),
        y1: _toDouble(json['y1']),
        x2: _toDouble(json['x2']),
        y2: _toDouble(json['y2']),
      ),
    'circle' => CanvasCircle(
        id: id,
        name: name,
        paint: paint,
        rotation: _toDouble(json['rotation']),
        locked: locked,
        hidden: hidden,
        x: _toDouble(json['x']),
        y: _toDouble(json['y']),
        radius: _toDouble(json['radius']),
      ),
    'text' => CanvasTextObject(
        id: id,
        name: name,
        paint: paint,
        rotation: _toDouble(json['rotation']),
        locked: locked,
        hidden: hidden,
        text: json['text']?.toString() ?? '',
        x: _toDouble(json['x']),
        y: _toDouble(json['y']),
      ),
    'image' => CanvasImageObject(
        id: id,
        name: name,
        paint: paint,
        rotation: _toDouble(json['rotation']),
        locked: locked,
        hidden: hidden,
        src: json['src']?.toString() ?? '',
        x: _toDouble(json['x']),
        y: _toDouble(json['y']),
        width: _toDouble(json['width']),
        height: _toDouble(json['height']),
        crossOrigin: json['crossOrigin']?.toString(),
      ),
    _ => throw ArgumentError('Unknown canvas object type: ${json['type']}'),
  };
}