Progress控件能让人们感受到一个应用程序执行的进度,在很多应用程序中都能用到它,但通常只支持在单任务中,在Windows98/NT中文操作系统下,在VC++6.0环境下,利用线程编制了一个非常小巧的应用程序来实现Progress控件的使用。它可以支持多线程,使用起来很方便。

以下是这个应用程序的源代码:

//ProgressDialog.h

class CProgressDialog : public CDialog

{

     // Construction

     public:

     CProgressDialog(LPCSTR caption, BOOL

     enableCancel=TRUE, CWnd* pParent = NULL);

     // standard constructor

     virtual ～CProgressDialog(void);

     // Dialog Data

     //{{AFX_DATA(CProgressDialog)

     enum { IDD = IDD_PROGRESS_DIALOG };

     CStatic

     m_MessageStatic; //进程条标题

     CButton m_CancelButton; //中止按钮控键

     CProgressCtrl

     m_ProgressCtrl;

     //}}AFX_DATA

     CString m_Caption;

　      //对话框标题

     BOOL m_EnableCancel; //中止按钮显示开关

     BOOL m_IsCancel; //中止按钮是否按下开关

     HANDLE m_Thread;

　   //线程句柄

     static DWORD WINAPI ThreadProc(CProgressDialog* dlg); //静态线程

     void SetProgress(int percent) //设置进程位置

     { m_ProgressCtrl.SetPos(percent);}

     void SetMessage(LPCSTR msg) //设置进程条标题

     { m_MessageStatic.SetWindowText(msg);}

     BOOL IsCancel(void)

     { return m_IsCancel;}

     virtual DWORD ProgressProc()=0;//线程过程纯虚函数

     // Overrides

     // ClassWizard generated virtual function overrides

     //{{AFX_VIRTUAL(CProgressDialog)

     protected:

     virtual void DoDataExchange(CDataExchange* pDX);

　   // DDX/DDV support

    //}}AFX_VIRTUAL

    // Implementation

    protected:

    // Generated message map functions

    //{{AFX_MSG(CProgressDialog)

    virtual BOOL OnInitDialog();

    virtual void OnCancel();

    virtual void OnOK();

    //}}AFX_MSG

   DECLARE_MESSAGE_MAP()

};

class CMyProgressDialog:public CProgressDialog {

      public:

      CMyProgressDialog(LPCSTR caption):CProgressDialog(caption) {}

      virtual DWORD ProgressProc(); //继承过程

};

// ProgressDialog.cpp

#include "stdafx.h"

#include "ProgressTest.h"

#include "ProgressDialog.h"

#ifdef _DEBUG

#define new DEBUG_NEW

#undef THIS_FILE

static char THIS_FILE[] = __FILE__;

#endif

CProgressDialog::CProgressDialog(LPCSTR caption, BOOL enableCancel, CWnd* pParent /*=NULL*/) :

CDialog(CProgressDialog::IDD, pParent)

{

    //{{AFX_DATA_INIT(CProgressDialog)

    m_Caption=caption;
 
    m_EnableCancel=enableCancel;

    m_IsCancel=FALSE;

    m_Thread=NULL;

    //}}AFX_DATA_INIT

}

CProgressDialog::～CProgressDialog(void)

{

     if (m_Thread) {

     CloseHandle(m_Thread);

}}

void

CProgressDialog::DoDataExchange(CDataExchange* pDX)

{CDialog::DoDataExchange(pDX);

    //{{AFX_DATA_MAP(CProgressDialog)

DDX_Control (pDX IDC_MESSAGE_STATIC, m_MessageStatic);

DDX_Control(pDX, IDCANCEL, m_CancelButton);

DDX_Control(pDX, IDC_PROGRESS, m_ProgressCtrl);

    //}}AFX_DATA_MAP

}

BEGIN_MESSAGE_MAP(CProgressDialog, CDialog)

    //{{AFX_MSG_MAP(CProgressDialog)

    //}}AFX_MSG_MAP

END_MESSAGE_MAP()

   // CProgressDialog message handlersBOOL CProgressDialog::OnInitDialog()

     {

        CDialog::OnInitDialog();

        // TODO: Add extra initialization here

        m_ProgressCtrl.SetRange(0, 100);

        m_ProgressCtrl.SetPos(0);

        SetWindowText(m_Caption);

           if (!m_EnableCancel) {

               m_CancelButton.ShowWindow(SW_HIDE);

            }

      DWORD threadID;

      m_Thread=CreateThread(NULL, 0,

      (LPTHREAD_START_ROUTINE)CProgressDialog::Thread

      Proc,(LPVOID)this,0,&threadID);

      return TRUE; // return TRUE unless you set the focus to a control

　     // EXCEPTION: OCX Property Pages should return

    FALSE

}

DWORD WINAPI

CProgressDialog::ThreadProc(CProgressDialog* dlg)

{DWORD ret=dlg->ProgressProc();

dlg->PostMessage(WM_COMMAND, IDOK);

return ret;

}

void CProgressDialog::OnCancel()

{

    // TODO: Add extra cleanup here

    if (m_EnableCancel) m_IsCancel=TRUE;

}

void CProgressDialog::OnOK()

{

     // TODO: Add extra validation here

     WaitForSingleObject(m_Thread, INFINITE);

     CDialog::OnOK();

}DWORD CMyProgressDialog::ProgressProc()

{SetMessage("Progress...");

for (int i=0;i<100;i++) {

　    if (IsCancel()) break;

          Sleep(100);

            SetProgress(i);

       }

    return 0;

}


只需在应用Progress控件的地方调用CMyProgressDialog类的对象即可。可根据不同的应用程序修改DWORD CMyProgressDialog::ProgressProc()这个继承函数的函数体来适应相应的程序。