How to calculate the top position of the pressed StackedBar

[abrarmohi]

Question

How can I calculate the top position of a pressed StackedBar? I have added ChartPressState, which can identify the pressed bar, but calculating the top was somewhat challenging for me. I tried to calculate it in different ways from the ChartPressState, but the position wasn't accurate in all cases.

Background Info/Attempts

Since I noticed 0 on Y axis was top of the canvas, I tried to find the minimum position from the stacked bars, hoping it would be the top-most bar, but it wasn't exactly the case. The goal was to position a Skia Circle at the top of stacked bars for the pressed row.

const [touch1] = touches;

const allY = Object.values(touch1.y)
  .map((entry) => entry.position.value)
  .filter((y) => !isNaN(y));
const minY = Math.min(...allY);
tooltipY1.value = minY;