unit1.cpp

来自「有视频」· C++ 代码 · 共 38 行

//---------------------------------------------------------------------------
#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::PaintBox1Paint(TObject *Sender)
{
  int ii,jj,rows,cols,ww;
  HDC ddc;
  Graphics::TBitmap *bmp;
  bmp = new Graphics::TBitmap();
  bmp->LoadFromFile("te.bmp");
  ddc=GetDC(ScrollBox1->Handle);
  ww=ScrollBox1->HorzScrollBar->Range;
  if(ww<ScrollBox1->Width)ww=ScrollBox1->Width;
  cols=ww/bmp->Width;

  ww=ScrollBox1->VertScrollBar->Range;
  if(ww<ScrollBox1->Height)ww=ScrollBox1->Height;
  rows=ww/bmp->Height;
  for(ii=0;ii<rows;ii++)
    for(jj=0;jj<cols;jj++)
      BitBlt(ddc,jj*bmp->Width,ii*bmp->Height,bmp->Width,bmp->Height,bmp->Canvas->Handle,0,0,SRCCOPY);
  delete bmp;

}
//---------------------------------------------------------------------------