Talking about the use of the Progress control in VC ++

zhaozj2021-02-08  264

Talking about the use of the Progress control in VC

Dalian Jietong Computer Technology Co., Ltd. Wang Wei (Jtone@mail.dlptt.ln.cn)

The Progress control allows people to feel the progress of an application, it can be used in many applications, but usually only support in a single task, I am in a Windows 98 / NT Chinese operating system, in the VC 6.0 environment Under the use of threads, a very small application is used to implement the use of the Progress control. It can support multithreading, which is very convenient to use.

The following is the source code for this app:

//Progressdialog.h

Class CProgressDialog: Public CDialog

{

// construction

PUBLIC:

CPROGRESSDIALOG (LPCSTR CAPTION, BOOL

Enablecancel = true, cWnd * pParent = null;

// Standard Constructionor

Virtual ~ CProgressDialog (Void);

// Dialog Data

// {{AFX_DATA (CPROGRESSDIALOG)

ENUM {IDD = IDD_PROGRESS_DIALOG};

CSTATIC

m_MessageStatic; // Processes Title

Cbutton m_cancelbutton; // abort button control

CPROGRESSCTRL

M_ProgressCtrl;

//}} AFX_DATA

CSTRING M_CAPTION;

// Dialog Box Title

BOOL M_ENABLECANCEL; // Mediation Button Display Switch

Bool m_iscancel; // Mediation button Press the switch

Handle m_thread;

// thread handle

Static DWORD WINAPI ThreadProc (CPROGRESSDIALOG * DLG); // Static thread

Void SetProgress // Setting Procedure Location

{m_progressctrl.setpos (percent);

Void SetMessage (LPCSTR MSG) // Settings Processes Title

{m_MessageStatic.SetWindowText (MSG);

Bool Iscancel (Void)

{RETURN M_ICANCANCANCANCANCANCANCANCANCANCANCANCANCENCEL

Virtual dword progressProc () = 0; // thread process pure virtual function

// 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 (); // inheritance process

}

// 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 (LPCSTDILOG (LPCSTR CAPTION, BOOL Enablecancel, CWnd * PParent / * = null * /):

CDialog (CProgressDialog :: IDD, PParent)

{

// {{AFX_DATA_INIT (CPROGRESSDIALOG)

M_CAPTION = CAPTION;

M_ENABLANCEL = 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, IDCANCANCEL, 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 :: OnItDialog ()

{

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 UnsS 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 hered (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;

}

Simply call the object of the CMYPROGRESSDIALOG class in places where the Progress control is applied. Deword CMYPROGRESSDIALOG :: ProgressProcressDialog :: ProgressProcressDialog :: ProgressProcressDialog :: ProgressProcressDialog :: ProgressProcressDialog :: ProgressProcressDialog :: ProgressProc () can be adapted to the corresponding program.

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