Detect which series is being clicked when clicking legend
Posted: Fri Apr 01, 2005 7:58 am
when user click in the legend area. Suppose i have 5 series, how to detect which series is being clicked.
thank you
thank you
You can use the chart's OnClickLegend event. Using the Clicked method you will get the series index starting at 0 and with the index you will be able to address each sereis. This is a small example on how to use this:
Code: Select all
procedure TForm1.FormCreate(Sender: TObject);
var
i: Integer;
begin
for i:=0 to Chart1.SeriesCount-1 do
begin
Chart1[i].FillSampleValues();
Chart1[i].SeriesColor:=clRed;
end;
end;
procedure TForm1.Chart1ClickLegend(Sender: TCustomChart;
Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
SeriesIndex: Integer;
begin
SeriesIndex:=Chart1.Legend.Clicked(X,Y);
Chart1[SeriesIndex].SeriesColor:=clBlue;
Chart1.Title.Text.Clear;
Chart1.Title.Text.Add(IntToStr(SeriesIndex));
end;