Method processSelect

src/LGraphCanvas.ts:3689–3713

* Determines whether to select or deselect an item that has received a pointer event. Will deselect other nodes if * @param item Canvas item to select/deselect * @param e The MouseEvent to handle * @param sticky Prevents deselecting individual nodes (as used by aux/right-click) * @remar

(
    item: TPositionable | null | undefined,
    e: CanvasPointerEvent | undefined,
    sticky: boolean = false,
  )

   * Accessibility: anyone using {@link mutli_select} always deselects when clicking empty space.
   */
  processSelect<TPositionable extends Positionable = LGraphNode>(
    item: TPositionable | null | undefined,
    e: CanvasPointerEvent | undefined,
    sticky: boolean = false,
  ): void {
    const addModifier = e?.shiftKey
    const subtractModifier = e != null && (e.metaKey || e.ctrlKey)
    const eitherModifier = addModifier || subtractModifier
    const modifySelection = eitherModifier || this.multi_select

    if (!item) {
      if (!eitherModifier || this.multi_select) this.deselectAll()
    } else if (!item.selected || !this.selectedItems.has(item)) {
      if (!modifySelection) this.deselectAll(item)
      this.select(item)
    } else if (modifySelection && !sticky) {
      this.deselect(item)
    } else if (!sticky) {
      this.deselectAll(item)
    } else {
      return
    }
    this.onSelectionChange?.(this.selected_nodes)
    this.setDirty(true)
  }

  /**
   * Selects a {@link Positionable} item.