Get Series Index under cursor when TChart is clicked

Question

How can I get series index from cursor position when I click TChart?

Thank you.

Answer 1

From your clicked event, you will get the X,Y mouse position.

var
  SeriesIndex: Integer;
begin
  SeriesIndex := Series1.Clicked(X,Y);
  if (SeriesIndex <> -1) then
  begin
    // Do something with SeriesIndex
  end;
  ...
end;

It is also possible to assign an OnClickSeries event to the chart.

procedure TForm1.Chart1ClickSeries(Sender: TCustomChart;
  Series: TChartSeries; ValueIndex: Integer; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);