Find screen location for bars in a bar chart

[peterlondon1]

Can anyone give me some help in determining the screen location for each bar in a bar chart - so that I can extend the bars under the axis in a particular way?

[ghost]

Refer to BarChartRenderer.

[liuxuan30]

You have some choices, like leveraging the ChartViewDelegate to know which bar is highlighted as a reference.
The core is it will convert data value into screen point value, by using Transformer's pointValueToPixel and pixelsToValues. Just take a look at Transformer