title Type – MouseEventState

type MouseEventState = {
  mouse: MouseState & { stopped: boolean },
  index: number,
  hovered: boolean,
  captured: boolean,
  pressed: {
    left: boolean,
    middle: boolean,
    right: boolean,
  },
  clicks: {
    left: number,
    middle: number,
    right: number,
  },
  presses: {
    left: number,
    middle: number,
    right: number,
  },
  stop: () => void,
}

Source

packages / workbench / src / providers / event-provider.ts