u7_4_2.cpp

《C++ Builder 5程序设计——基础教学篇》程序源代码2.

//----------------------  u7_4_2  -----------------------------------------------------
#include<math.h>
#include <vcl.h>
#pragma hdrstop

#include "u7_4_2.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
Tf7_4_2 *f7_4_2;
//---------------------------------------------------------------------------
__fastcall Tf7_4_2::Tf7_4_2(TComponent* Owner)
    : TForm(Owner)
{
}
int m_flag,shape_value;
//---------------------------------------------------------------------------
void __fastcall Tf7_4_2::FormCreate(TObject *Sender)
{
  img1->Picture->LoadFromFile("..\\elephant.bmp");
  img2->Picture->LoadFromFile("..\\monkey.bmp");
  img3->Picture->LoadFromFile("../mouse.bmp");
  img4->Picture->LoadFromFile("../rabbit.bmp");
  m_flag=1;shape_value=0;
  }
//---------------------------------------------------------------------------
void __fastcall Tf7_4_2::FormMouseDown(TObject *Sender,
      TMouseButton Button, TShiftState Shift, int X, int Y)
{
  m_flag=0;
  if(Button == 1)
  {  shape_value++;
     if(shape_value>5) shape_value=0;
     shpMove->Shape=shape_value;
  }
}
//---------------------------------------------------------------------------

void __fastcall Tf7_4_2::FormMouseUp(TObject *Sender, TMouseButton Button,
      TShiftState Shift, int X, int Y)
{
  m_flag=1;
}
//---------------------------------------------------------------------------

void __fastcall Tf7_4_2::FormMouseMove(TObject *Sender, TShiftState Shift,
      int X, int Y)
{
  if (m_flag)
  {   shpMove->Left=X-shpMove->Width;
      shpMove->Top=Y-shpMove->Height;
   }
   else
   {  shpMove->Width=abs(X-shpMove->Left);
      shpMove->Height=abs(Y-shpMove->Top);
    }

}
//---------------------------------------------------------------------------
void __fastcall Tf7_4_2::cmdEndClick(TObject *Sender)
{
  Close();
}
//---------------------------------------------------------------------------