receiveSyncedCrosshair method

void receiveSyncedCrosshair(DateTime? timestamp, double? yPriceRatio)

Handles crosshair synchronization from another chart in the ChartSyncGroup.

Implementation

void receiveSyncedCrosshair(DateTime? timestamp, double? yPriceRatio) {
  if (!_showCrosshair || timestamp == null || candles.isEmpty) {
    _crosshairPosition = null;
    _hoveredCandle = null;
    notifyListeners();
    return;
  }

  final timestamps = candles.map((c) => c.timestamp).toList();
  final matchIdx =
      ChartSyncGroup.findClosestCandleIndex(timestamps, timestamp);
  if (matchIdx < 0 || matchIdx >= candles.length) {
    _crosshairPosition = null;
    _hoveredCandle = null;
    notifyListeners();
    return;
  }

  _isReceivingSync = true;
  try {
    final converter = CoordinateConverter(
      viewport: _viewport,
      totalCandles: candles.length,
    );
    final targetX = converter.indexToX(matchIdx);
    final targetY = (yPriceRatio != null && _viewport.viewportHeight > 0)
        ? (yPriceRatio * _viewport.viewportHeight)
            .clamp(0.0, _viewport.viewportHeight)
        : (_viewport.viewportHeight * 0.5);

    _crosshairPosition = Offset(targetX, targetY);
    _hoveredCandle = candles[matchIdx];
    notifyListeners();
  } finally {
    _isReceivingSync = false;
  }
}