translateDrawing method

void translateDrawing(String id, int deltaCandles, double deltaPrice)

Translates all points and prices of a drawing by a given candle and price delta.

Implementation

void translateDrawing(String id, int deltaCandles, double deltaPrice) {
  final index = _drawings.indexWhere((d) => d.id == id);
  if (index >= 0) {
    final drawing = _drawings[index];
    if (drawing.isLocked) return;

    final updatedPoints = drawing.points.map((p) {
      return p.copyWith(
        candleIndex: p.candleIndex + deltaCandles,
        price: double.parse((p.price + deltaPrice).toStringAsFixed(2)),
      );
    }).toList();

    final updatedProps = Map<String, dynamic>.from(drawing.properties);
    if (updatedProps.containsKey('targetPrice')) {
      updatedProps['targetPrice'] = double.parse(
        ((updatedProps['targetPrice'] as double) + deltaPrice)
            .toStringAsFixed(2),
      );
    }
    if (updatedProps.containsKey('stopPrice')) {
      updatedProps['stopPrice'] = double.parse(
        ((updatedProps['stopPrice'] as double) + deltaPrice).toStringAsFixed(
          2,
        ),
      );
    }

    _drawings[index] = drawing.copyWith(
      points: updatedPoints,
      properties: updatedProps,
    );
    notifyListeners();
  }
}