Method #setupNodeSelectionDrag

src/LGraphCanvas.ts:2323–2339

(e: CanvasPointerEvent, pointer: CanvasPointer, node?: LGraphNode | undefined)

  }

  #setupNodeSelectionDrag(e: CanvasPointerEvent, pointer: CanvasPointer, node?: LGraphNode | undefined): void {
    const dragRect = new Float32Array(4)

    dragRect[0] = e.canvasX
    dragRect[1] = e.canvasY
    dragRect[2] = 1
    dragRect[3] = 1

    pointer.onClick = (eUp) => {
      // Click, not drag
      const clickedItem = node ?? this.#getPositionableOnPos(eUp.canvasX, eUp.canvasY)
      this.processSelect(clickedItem, eUp)
    }
    pointer.onDragStart = () => this.dragging_rectangle = dragRect
    pointer.onDragEnd = upEvent => this.#handleMultiSelect(upEvent, dragRect)
    pointer.finally = () => this.dragging_rectangle = null
  }

  /**
   * Processes a pointerdown event inside the bounds of a node.  Part of {@link processMouseDown}.