unit1.cpp

<<C++Builder 6实用编程100例>>随书光盘

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

#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)
{
        if(OpenPictureDialog1->Execute())
        {
                Image1->Picture->LoadFromFile(OpenPictureDialog1->FileName);
                Button2->Enabled=true;
                Button2->SetFocus();
        }
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender)
{
        Graphics::TBitmap* myBitmap;
        myBitmap=new Graphics::TBitmap;
        myBitmap->Width=Image1->Width;
        myBitmap->Height=Image1->Height;
        int width,height;
        width=Image1->Width;
        height=Image1->Height;
        for(int i=height;i>0;i--)
                for(int j=0;j<=i;j++)
                {
                        myBitmap->Canvas->CopyRect(Rect(0,j,width,j-1),Image1->Canvas,
                                                Rect(0,i,width,i-1));
                        Form1->Canvas->Draw(18,18,myBitmap);     
                        Application->ProcessMessages();
                }
        delete myBitmap;
}
//---------------------------------------------------------------------------