mainform.cpp

来自「C++ BUILDER精彩编程实例集锦(源码)2 第三部分 文件操作 第四部」· C++ 代码 · 共 51 行

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

#include <vcl.h>
#pragma hdrstop

#include "Mainform.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn3Click(TObject *Sender)
{
   this->Close();        
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{
   if(this->OpenPictureDialog1->Execute())
   {
      AnsiString StrFileName=this->OpenPictureDialog1->FileName;
      this->Image1->Picture->LoadFromFile(StrFileName);
   }
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{
   int iLeft,iTop,iWidth,iHeight;
   iLeft =this->Image1->Left;
   iTop =this->Image1->Top;
   iWidth =this->Image1->Width;
   iHeight =this->Image1->Height;
   for (int i = 0; i<=iWidth; i+=2)
   { //通过图像的坐标选定图像的一部分
     this->Image1->Left = iLeft + (iWidth - i)/2;
     this->Image1->Top =iTop + iHeight/2 - i*iHeight/iWidth/2;
     this->Image1->Width = i;
     this->Image1->Height = i*iHeight/iWidth;
     this->Image1->Refresh();
   }
}
//---------------------------------------------------------------------------