Strange tooltip behaviour on stacked bar chart

[mstainer14]

Hi @entronad,

I am experiencing a strange issue with a stacked bar chart paired with a tooltip.

I have the following selections included in my graph:

selections: {
  'tooltipTouch': PointSelection(
    on: {
      GestureType.tapDown,
      GestureType.longPressMoveUpdate,
    },
    clear: {
      GestureType.scaleUpdate,
      GestureType.doubleTap,
    },
    // dim: Dim.x,
    devices: {PointerDeviceKind.touch},
  ),
  'groupTouch': PointSelection(
    on: {
      GestureType.tapDown,
      GestureType.longPressMoveUpdate,
[Screencast from 05-08-24 18:00:29.webm](https://github.com/user-attachments/assets/8abf0011-be2d-436f-9b19-436828a80598)

    },
    clear: {
      GestureType.scaleUpdate,
      GestureType.doubleTap,
    },
    devices: {PointerDeviceKind.touch},
  ),
},

and the tooltip is as follows:

tooltip: TooltipGuide(
  renderer: simpleTooltip,
  selections: {'tooltipTouch', 'tooltipMouse'},
),

Screencast.from.05-08-24.18.00.29.webm

In the attached video you can see that when I select the bar chart at X-value 17 at the very bottom of the bar. the first tooltip for X-value 1 is shown. Similarly, if I click slightly above but still below the value at X-value 19 the tooltip for that value is selected. The tooltip for X-value 17 is only shown if I click anywhere above the '200kg' label.

I can add dim: Dim.x, to the PointSelection() however, this now makes it so that I cannot individually select each tooltip when the bar charts are stacked.

Is there a way such that when a stacked bar is clicked it only shows the tooltip for the portion of the bar and not any of the surrounding ones?

The desired behaviour is like the following:

Screencast.from.05-08-24.18.05.22.webm

Many thanks! 😄