動作環境

RAD Studio 10.2 Tokyo Update 3
TeeChart Standard v2016.17.160129 32bit VCL

概要

ある特定の線が描画されない

実装

Unit1.h

//---------------------------------------------------------------------------

# ifndef Unit1H
# define Unit1H
//---------------------------------------------------------------------------
# include <System.Classes.hpp>
# include <Vcl.Controls.hpp>
# include <Vcl.StdCtrls.hpp>
# include <Vcl.Forms.hpp>
# include <Vcl.ExtCtrls.hpp>
# include <VCLTee.Chart.hpp>
# include <VCLTee.Series.hpp>
# include <VclTee.TeeGDIPlus.hpp>
# include <VCLTee.TeEngine.hpp>
# include <VCLTee.TeeProcs.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:	// IDE で管理されるコンポーネント
	TChart *Chart1;
	TFastLineSeries *Series1;
	TButton *Button1;
	void __fastcall Button1Click(TObject *Sender);
private:	// ユーザー宣言
public:		// ユーザー宣言
	__fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
# endif

Unit1.cpp

//---------------------------------------------------------------------------

# include <vcl.h>
# pragma hdrstop

# include "Unit1.h"
//---------------------------------------------------------------------------
# pragma package(smart_init)
# pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
	Series1->AddXY(2.5, 2.0);
	Series1->AddXY(3.5, 3.5);
	Series1->AddXY(3.5, 2.0);
	Series1->AddXY(2.5, 2.0);

	Chart1->LeftAxis->SetMinMax(0, 5.0);
	Chart1->BottomAxis->SetMinMax(0, 5.0);
}
//---------------------------------------------------------------------------

結果

(3.5, 2.0)から(2.5, 2.0)への線が描画されない。