u6_8_1.cpp

《C++ Builder 5程序设计——基础教学篇》程序源代码2.

//-------------------  u6_8_1  --------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "u6_8_1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
Tf6_8_1 *f6_8_1;
//---------------------------------------------------------------------------
__fastcall Tf6_8_1::Tf6_8_1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
float speed;
void __fastcall Tf6_8_1::FormActivate(TObject *Sender)
{
  imgCar->Picture->LoadFromFile("D:\\ch06\\c6_8_1\\Cars.bmp");
  hsbSpeed->Position=500;
  speed=hsbSpeed->Position/1000.0;
  tmrSpeed->Interval=hsbSpeed->Position;
}
//---------------------------------------------------------------------------

void __fastcall Tf6_8_1::tmrSpeedTimer(TObject *Sender)
{
   imgCar->Left=imgCar->Left+10;
  if (imgCar->Left>=Width)
    {
     imgCar->Left=-Width;
    }

}
//---------------------------------------------------------------------------
void __fastcall Tf6_8_1::hsbSpeedChange(TObject *Sender)
{
  speed=((hsbSpeed->Position)/1000);
   tmrSpeed->Interval=hsbSpeed->Position;        
}
//---------------------------------------------------------------------------
void __fastcall Tf6_8_1::btnEndClick(TObject *Sender)
{
   Close();        
}
//---------------------------------------------------------------------------