bmp.cpp

C++ Builder 6 编程实例教程-北京希望电子出版社出版

//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "BMP.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::FormCreate(TObject *Sender)
{
Form1->DirectoryListBox1->Drive='c';
//设置控件的缺省路径
}
//---------------------------------------------------------------------------

void __fastcall TForm1::FileListBox1Click(TObject *Sender)
{
Form1->Image1->Picture->LoadFromFile(Form1->FileListBox1->FileName);
Form1->Image2->Picture->LoadFromFile(Form1->FileListBox1->FileName);
//读取图象信息
if (Form1->Image1->Width>Form1->Image2->Width)
   {
   Form1->ScrollBar1->Visible=true;
   Form1->ScrollBar1->Max=Form1->Image1->Width-Image2->Width;
   }
   //如果图象尺寸比显示区域大，那么显示滚动条
   else
   Form1->ScrollBar1->Visible=false;
if (Form1->Image1->Height>Form1->Image2->Height)
   {
   Form1->ScrollBar2->Visible=true;
   Form1->ScrollBar2->Max=Form1->Image1->Height-Image2->Height;
   }
   //如果图象尺寸比显示区域大，那么显示滚动条
   else
   Form1->ScrollBar2->Visible=false;
}
//---------------------------------------------------------------------------



void __fastcall TForm1::ScrollBar1Scroll(TObject *Sender,
      TScrollCode ScrollCode, int &ScrollPos)
{
Form1->Image1->Left=-Form1->ScrollBar1->Position;
//滚动显示图象
}
//---------------------------------------------------------------------------

void __fastcall TForm1::ScrollBar2Scroll(TObject *Sender,
      TScrollCode ScrollCode, int &ScrollPos)
{
Form1->Image1->Top=-Form1->ScrollBar2->Position;
//滚动显示图象
}
//---------------------------------------------------------------------------