Function handlePointerDown

hooks/DrawLineTool.ts:25–50

(e: KonvaEventObject<MouseEvent | TouchEvent>)

  const currentLineId = useRef<string | null>(null);

  const handlePointerDown = (e: KonvaEventObject<MouseEvent | TouchEvent>) => {
    if (tool !== "line") return;

    // Save current state before starting new drawing
    saveToHistory();

    isDrawing.current = true;

    const stage = e.target.getStage();
    const pos = stage ? getPointerPositionRelativeToStage(stage) : null;
    if (!pos) return;

    const newLine: LineShapeWithProps = {
      id: createShapeId(),
      initialX: pos.x,
      initialY: pos.y,
      x: pos.x,
      y: pos.y,
      stroke: properties.stroke,
      strokeWidth: properties.strokeWidth,
      opacity: properties.opacity,
    };

    addLine(newLine);
    currentLineId.current = newLine.id;
  };

  const handlePointerMove = (e: KonvaEventObject<MouseEvent | TouchEvent>) => {
    if (!isDrawing.current || tool !== "line") return;