Code (Javascript)

alignLeft(): void {
    const selectedNodes = this.diagram?.selection.nodes

    if (selectedNodes && selectedNodes.length > 0) {
      let leftmostX = selectedNodes[0].bounds.x
      let leftmostY = selectedNodes[0].bounds.y
      let nodeWidth = selectedNodes[0].bounds.width
      let nodeHeight = selectedNodes[0].bounds.height
      const verticalSpacing = 8

      for (let i = 1; i < selectedNodes.length; i++) {
        const node = selectedNodes[i]

        if (node.bounds.x < leftmostX) {
          leftmostX = node.bounds.x
          leftmostY = node.bounds.y
        }
      }

      for (let i = 0; i < selectedNodes.length; i++) {
        const node = selectedNodes[i]
        node.setBounds(new MindfusionDrawing.Rect(leftmostX, leftmostY, nodeWidth, nodeHeight), true)

        leftmostY += verticalSpacing
      }

      this.diagram?.invalidate()
    }
  }