C++ builder > TLabel > Caption 문자열을 지정된 프레임에 고정하기 위해 Font 크기 자동 조정

C++ Builder XE4

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

#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)
{
    String kDummyString = L"START_jfkldsajkfjdklsajfkldjsklfjaksdljfkldsjalkjfsdk_END";

    Label1->Caption = kDummyString;

    int fntsiz[] = { 16, 14, 12, 10, 8}; // 大きいサイズから
    int size = sizeof(fntsiz) / sizeof(fntsiz[0]);

    bool widthIsOk;

    for(int idx=0; idx<size; idx++) {
        Label1->Font->Size = fntsiz[idx];
        widthIsOk = checkWidthIsLargeEnough(Label1);
        if (widthIsOk) {
            break;
        }
    }

    int nop=1;
}
//---------------------------------------------------------------------------

bool __fastcall TForm1::checkWidthIsLargeEnough(TLabel *lblPtr)
{
    int orgWdt = lblPtr->Width;

    // to check
    lblPtr->AutoSize = true;
    int aftWdt = lblPtr->Width;

    // recover
    lblPtr->AutoSize = false;
    lblPtr->Width = orgWdt;

    return (aftWdt < orgWdt);
}