startDrawing method

void startDrawing(Offset point, { Map<String, dynamic>? properties, })

Implementation

void startDrawing(Offset point, {Map<String, dynamic>? properties}) {
  debugPrint('DrawingToolManager.startDrawing: $_currentToolType at $point');
  if (_currentToolType == null) return;

  _finishCurrentDrawing();

  final id = _generateId();

  switch (_currentToolType!) {
    case DrawingToolType.trendLine:
      _currentDrawingTool = TrendLineTool(
        id: id,
        startPoint: point,
        color: properties?['color'] ?? const Color(0xFFFFD700),
        strokeWidth: properties?['strokeWidth'] ?? 2.0,
      );
      break;
    case DrawingToolType.trendAngle:
      _currentDrawingTool = TrendAngleTool(
        id: id,
        startPoint: point,
        color: properties?['color'] ?? const Color(0xFFFFD700),
        strokeWidth: properties?['strokeWidth'] ?? 2.0,
      );
      break;
    case DrawingToolType.arrow:
      _currentDrawingTool = ArrowTool(
        id: id,
        startPoint: point,
        color: properties?['color'] ?? const Color(0xFFFF6B6B),
        strokeWidth: properties?['strokeWidth'] ?? 2.0,
      );
      break;
    case DrawingToolType.verticalLine:
      _currentDrawingTool = VerticalLineTool(
        id: id,
        xPosition: point.dx,
        color: properties?['color'] ?? const Color(0xFF00BFFF),
        strokeWidth: properties?['strokeWidth'] ?? 2.0,
      );
      // 垂直线工具创建后立即完成
      _currentDrawingTool!.state = DrawingToolState.none;
      _tools.add(_currentDrawingTool!);
      _currentDrawingTool = null;
      _notifyToolsChanged();
      return;
    case DrawingToolType.horizontalLine:
      _currentDrawingTool = HorizontalLineTool(
        id: id,
        yPosition: point.dy,
        color: properties?['color'] ?? const Color(0xFF00BFFF),
        strokeWidth: properties?['strokeWidth'] ?? 2.0,
      );
      // 水平线工具创建后立即完成
      _currentDrawingTool!.state = DrawingToolState.none;
      _tools.add(_currentDrawingTool!);
      _currentDrawingTool = null;
      _notifyToolsChanged();
      return;
    case DrawingToolType.horizontalRay:
      _currentDrawingTool = HorizontalRayTool(
        id: id,
        startPoint: point,
        color: properties?['color'] ?? const Color(0xFF00BFFF),
        strokeWidth: properties?['strokeWidth'] ?? 2.0,
      );
      break;
    case DrawingToolType.ray:
      _currentDrawingTool = RayTool(
        id: id,
        startPoint: point,
        color: properties?['color'] ?? const Color(0xFF00BFFF),
        strokeWidth: properties?['strokeWidth'] ?? 2.0,
      );
      break;
    case DrawingToolType.crossLine:
      _currentDrawingTool = CrossLineTool(
        id: id,
        centerPoint: point,
        color: properties?['color'] ?? const Color(0xFF00BFFF),
        strokeWidth: properties?['strokeWidth'] ?? 2.0,
      );
      // 十字线工具创建后立即完成
      _currentDrawingTool!.state = DrawingToolState.none;
      _tools.add(_currentDrawingTool!);
      _currentDrawingTool = null;
      _notifyToolsChanged();
      return;
  }

  if (_currentDrawingTool != null) {
    _currentDrawingTool!.state = DrawingToolState.drawing;
    _notifyToolsChanged();
  }
}