how to get the value corresponding to the position of the mouse cursor on the curve now?

Question

How to get the value corresponding to the position of the mouse cursor on the curve now?

I tried GetHorizAxis.LabelValue, but it just get the value where the mouse position is.

thanks.

Answer 1

Use XScreenToValue for needed Series to convert coordinate into the value at the corresponding axis:

procedure TForm1.Chart1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  Caption := FloatToStr(Series1.XScreenToValue(X));
end;