C++ Builder 10.2 Tokyo + TeeChart > 계열의 선을 SVG 출력한다

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

개요

참고

구현

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

#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;
    TButton *Button1;
    TLineSeries *Series1;
    TMemo *Memo1;
    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

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

#include <vcl.h>
#pragma hdrstop

#include <memory>
#include <DateUtils.hpp>
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
    Chart1->Series[0]->XValues->DateTime = true;
    Chart1->BottomAxis->DateTimeFormat = L"nn:ss";

    TDateTime dt;

    dt = Now();

    double yval;
    for (int idx=0; idx < 10; idx++) {
        yval = (1+ idx) % 2;
        Series1->AddXY(dt, yval, "", clRed);
        dt = IncSecond(dt, 1);
    }

    //
    Memo1->Lines->Clear();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
    int len = Series1->Count();

    float xval, yval;
    int xpos, ypos;
    String msg;

    Screen->Cursor = crHourGlass; // マウスカーソル

    std::unique_ptr<TStringList> wrkSL(new TStringList);

    String strwrk;
    wrkSL->Add(L"<?xml version=\"1.0\"?>");
    wrkSL->Add(L"<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\">");

    // Pathの例
    // from http://www.tohoho-web.com/ex/svg.html
    // <path d="M 5 20 L 20 5 L 35 20 L 20 20" stroke="black" fill="transparent" stroke-width="2" />
    strwrk = L"<path d=\"";
    for(int idx=0; idx < len; idx++) {
        xval = Series1->XValue[idx];
        yval = Series1->YValue[idx];
        xpos = Series1->CalcXPos(idx);
        ypos = Series1->CalcYPos(idx);
        if (idx == 0) {
            strwrk += String().sprintf(L" M %d %d", xpos, ypos);
        } else {
            strwrk += String().sprintf(L" L %d %d", xpos, ypos);
        }
    }
    strwrk += "\" stroke=\"red\" fill=\"transparent\" stroke-width=\"1\" />";
    wrkSL->Add(strwrk);

    wrkSL->Add(L"</svg>");

    wrkSL->SaveToFile(L"test.svg");

    Screen->Cursor = crArrow; // マウスカーソル
}
//---------------------------------------------------------------------------

화면

생성된 SVG 파일