Visual C++ and MFC Programming 2nd Edition

Visual C++ and MFC Fundamentals Chapter 18: Progress-Based Controls

Practical Learning: Using a Progress Bar

1. To specify the initial values of the progress controls, set their range appropriately in
   the OnInitDialog() event. Also, create a timer control

BOOL CPClockDlg::OnInitDialog()

{

CDialog::OnInitDialog();

// Set the icon for this dialog. The framework does this automatically

// when the application's main window is not a dialog

SetIcon(m_hIcon, TRUE); // Set big icon

SetIcon(m_hIcon, FALSE); // Set small icon

// TODO: Add extra initialization here

m_ProgressHours.SetRange(0, 23);

m_ProgressHours.SetStep(1);

m_ProgressMinutes.SetRange(0, 59);

m_ProgressMinutes.SetStep(1);

m_ProgressSeconds.SetRange(0, 59);

m_ProgressSeconds.SetStep(1);

SetTimer(1, 40, NULL);

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

}

2. Generate the WM_TIMER message for the dialog box and implement it as follows:

void CPClockDlg::OnTimer(UINT nIDEvent)

{

// TODO: Add your message handler code here and/or call default

// Get the current time of the computer

CTime CurTime = CTime::GetCurrentTime();

// Find the hour, the minute, and the second values of the time

int ValHours = CurTime.GetHour();

int ValMinutes = CurTime.GetMinute();

int ValSeconds = CurTime.GetSecond();

// Change each progress bar accordingly

m_ProgressHours.SetPos(ValHours);

m_ProgressMinutes.SetPos(ValMinutes);

m_ProgressSeconds.SetPos(ValSeconds);

// Display the position of the progress in the right label

m_ValueHours.Format("%d", m_ProgressHours.GetPos());

m_ValueMinutes.Format("%d", m_ProgressMinutes.GetPos());

m_ValueSeconds.Format("%d", m_ProgressSeconds.GetPos());

UpdateData(FALSE);

CDialog::OnTimer(nIDEvent);

}

3. Test the application