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Bug 1285

Summary:	Histogram sort Y does not work after source value changing
Product:	VCL TeeChart	Reporter:	Bert Kreisel <bert.kreisel>
Component:	Functions	Assignee:	Steema Issue Manager <issuemanager>
Status:	CONFIRMED ---
Severity:	normal	CC:	sandra
Priority:	Normal
Version:	150420
Target Milestone:	---
Hardware:	PC
OS:	Windows
Chart Series:	Line	Delphi / C++ Builder RAD IDE Version:	RAD XE5

Description Bert Kreisel 2015-08-31 04:01:43 EDT

Let a Histogram funktion series be sorted by "Y".
After Changing the values of the source series (change the number of sample values of a random serie) the Histogram series is no longer sorted by "Y". (It will be sorted again after changing the sort settings.)

Comment 1 sandra pazos 2015-08-31 08:11:25 EDT

Hello Bert,

Thanks for your requests. We can reproduce it. Seems the problem is caused, because, is necessary use the CheckOrder method in design-time. We will try to fix it to upcoming version of TeeChart Pro VCL/FMX.  Meantime, you can use the code below in runtime to fix the problem:

type
  TForm1 = class(TForm)
    Chart1: TChart;
    Series1: TBarSeries;
    Series2: TFastLineSeries;
    TeeFunction1: THistogramFunction;
    TeeCommander1: TTeeCommander;
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
Series1.FillSampleValues(10);
Series2.YValues.Order := loAscending;
Series2.CheckOrder;
end;