Add support for centrally places tooltips (screen center)

[pstanoev]

Used to create tours that have popup dialog style, with central tips, example:

[ankitk77]

LGTM
Thanks for the adding the feature

[ankitk77]

I think we should also add support for Arrow type None
bcz when placing tooltip centrally client may don't want to show any arrow on ballon

[pstanoev]

I think we should also add support for Arrow type None bcz when placing tooltip centrally client may don't want to show any arrow on ballon

Yes, I did that in our project by making the Arrow nullable.
But Arrow.none will be way better design.

public fun tooltipBalloonShape(
  arrow: Arrow?,
  density: Density,
  radius: Dp
): GenericShape = GenericShape { size, _ ->

  val cornerRadiusPx = radius.toPx(density)
  if (arrow != null) {
    // rounded rect and arrow top / bottom / left / right
    addRoundRect(
      RoundRect(
        left = arrow.startPadding.toPx(density),
        right = size.width - arrow.endPadding.toPx(density),
        top = arrow.topPadding.toPx(density),
        bottom = size.height - arrow.bottomPadding
          .toPx(density),
        cornerRadius = CornerRadius(cornerRadiusPx)
      )
    )
    addPath(arrow.draw(size, density))
  } else {
    // now arrow, just rounded rect
    addRoundRect(
      RoundRect(
        rect = Rect(
          offset = Offset.Zero,
          size = size
        ),
        cornerRadius = CornerRadius(cornerRadiusPx)
      )
    )

    return@GenericShape
  }

[pstanoev]

Btw. I can not merge this PR, it says that it is waiting for approval and/or build status to be reported.