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Date-Time Edit Control

, 25 Mar 2000
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A simple masked date-time editor.

Sample Image - datetimedit.jpg

Introduction

Many articles about the masked edit control could be discovered from MFC sites. Their Date Time Edit controls show some faults such as out-of-range values are not verified, slow processing, etc. Why? Maybe because they are too general and cover many things.

This VDateTimeEdit class based on MaskEdit's idea is very simple and understandable for any programmer. You can choose either numeric keys or up/down keys to change the date & time displayed. The Date-Time display is configurable by SetMask().

Mask convention:

DD Day hh Hour
MM Month mm minute
YYYY Year ss second

Enjoy yourself and please report me the bugs you have found.

Source Code

/////////////////////////////////////////////////////////////////////////////
// VDateTimeEdit window

const UINT WM_DATETIME_EDIT = ::RegisterWindowMessage("WM_DATETIME_EDIT");
#define DTE_DATETIMECHANGED 0x0001

class VDateTimeEdit : public CEdit
{
// Construction
public:
    VDateTimeEdit();

// Attributes
public:

// Operations
public:

// Overrides
    // ClassWizard generated virtual function overrides
    //{{AFX_VIRTUAL(VDateTimeEdit)
    protected:
    virtual void PreSubclassWindow();
    //}}AFX_VIRTUAL

// Implementation
public:
    CString GetMask() const {return m_strMask;}
    void SetMask(CString mask);
    COleDateTime GetDateTime();
    COleDateTime GetDateTime(CString str);
    void SetDateTime(COleDateTime dt);

    virtual ~VDateTimeEdit();

    // Generated message map functions
protected:
    afx_msg void OnContextMenu(CWnd*, CPoint point);

    CString m_strMask;
    //{{AFX_MSG(VDateTimeEdit)
    afx_msg void OnChar(UINT nChar, UINT nRepCnt, UINT nFlags);
    afx_msg void OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags);
    afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
    afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    //}}AFX_MSG

    DECLARE_MESSAGE_MAP()
};


bool VAtoi(CString str, int &res)
{
    str.Remove(char(32));
    if (str.IsEmpty()) return false;
    bool error = false;
    for (int i = 0; i < str.GetLength() && !error; i++) {
        int c = ::tolower(str[i]);
        error = !(
            (c >= '0' && c <= '9')
            || ((c == '-' || c == '+') && i == 0)
            );
    }
    if (!error) res = atoi(LPCTSTR(str));
    return !error;
}

template<class TYPE>
void VSetInRange(TYPE &x, TYPE min, TYPE max) 
{
    ASSERT(min<=max);
    if (x < min) x = min; else if (x > max) x = max;
}

/************************** VDateTimeEdit **************************/

VDateTimeEdit::VDateTimeEdit()
{
    m_strMask = _T("DD/MM/YYYY hh:mm:ss");
}

VDateTimeEdit::~VDateTimeEdit()
{

}


BEGIN_MESSAGE_MAP(VDateTimeEdit, CEdit)
    ON_WM_CONTEXTMENU()
    //{{AFX_MSG_MAP(VDateTimeEdit)
    ON_WM_CHAR()
    ON_WM_KEYUP()
    ON_WM_KEYDOWN()
    ON_WM_MOUSEMOVE()
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

///////////////////////////////////////////////////////////////////////////
// VDateTimeEdit message handlers

void VDateTimeEdit::OnChar(UINT nChar, UINT /*nRepCnt*/, UINT /*nFlags*/) 
{
    CString old;
    GetWindowText(old);
    int pos;
    TCHAR c;
    GetSel(pos, pos);
    switch (nChar) {
        case VK_BACK: pos--;
            break;
        case VK_UP: pos--;
            break;
        case '0':case '1':case '2':case '3':
        case '4':case '5':case '6':case '7':
        case '8':case '9':
            if (pos < old.GetLength()
                  && pos < m_strMask.GetLength()
                  && (UINT)old[pos] != nChar
                  && ((c = m_strMask[pos]) == 'D' || 
                  c == 'M' || c == 'Y' || c == 'h' 
                  || c == 'm' || c == 's')) {
                CString str = old;
                str.SetAt(pos, (TCHAR)nChar);
                COleDateTime dt = GetDateTime(str);
                if (dt.GetStatus() == COleDateTime::valid) SetDateTime(dt);
            }
            if (++pos < m_strMask.GetLength())
                for ( c = m_strMask[pos]; pos < m_strMask.GetLength() 
                    && c != 'D' && 
                    c != 'M' && c != 'Y' && 
                    c != 'h' && c != 'm' && c != 's';
                  c = m_strMask[pos]) pos++;
            break;
        default:
            if (++pos < m_strMask.GetLength())
                for ( c = m_strMask[pos]; pos < m_strMask.GetLength() 
                      && c != 'D' && c != 'M' 
                      && c != 'Y' && c != 'h' 
                      && c != 'm' && c != 's';
                    c = m_strMask[pos]) pos++;
            break;
    }
    SetSel(pos, pos);
}

void VDateTimeEdit::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
    CEdit::OnKeyUp(nChar, nRepCnt, nFlags);
}

void VDateTimeEdit::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
    switch (nChar) {
        case VK_DELETE:case VK_INSERT:
            break;
        case VK_UP: case VK_DOWN:
            {
                CString old;
                GetWindowText(old);
                int pos;
                GetSel(pos, pos);
                if (pos < m_strMask.GetLength()) {
                    TCHAR c = m_strMask[pos];
                    if (c != 'D' && c != 'M' && 
                      c != 'Y' && c != 'h' && 
                      c != 'm' && c != 's')
                        if (--pos >= 0) c = m_strMask[pos];
                    tm t;
                    COleDateTime dt = GetDateTime();
                    t.tm_mday = dt.GetDay();
                    t.tm_mon = dt.GetMonth();
                    t.tm_year = dt.GetYear();
                    t.tm_hour = dt.GetHour();
                    t.tm_min = dt.GetMinute();
                    t.tm_sec = dt.GetSecond();
                    switch (c) {
                        case 'D':
                            t.tm_mday += (nChar!=VK_UP) ? -1 : 1;
                            break;
                        case 'M':
                            t.tm_mon += (nChar!=VK_UP) ? -1 : 1;
                            break;
                        case 'Y':
                            t.tm_year += (nChar!=VK_UP) ? -1 : 1;
                            break;
                        case 'h':
                            t.tm_hour += (nChar!=VK_UP) ? -1 : 1;
                            break;
                        case 'm':
                            t.tm_min += (nChar!=VK_UP) ? -1 : 1;
                            break;
                        case 's':
                            t.tm_sec += (nChar!=VK_UP) ? -1 : 1;
                            break;
                        default    :
                             CEdit::OnKeyDown(nChar, nRepCnt, nFlags);
                            break;
                    }
                    dt.SetDateTime(t.tm_year, t.tm_mon, t.tm_mday, 
                                      t.tm_hour, t.tm_min, t.tm_sec);
                    if (dt.GetStatus() == COleDateTime::valid) 
                        SetDateTime(dt);
                } else CEdit::OnKeyDown(nChar, nRepCnt, nFlags);
            }
            break;
        default:
            CEdit::OnKeyDown(nChar, nRepCnt, nFlags);
            break;
    }
}

void VDateTimeEdit::OnMouseMove(UINT nFlags, CPoint point) 
{
    // TODO: Add your message handler code here and/or call default
    
    CEdit::OnMouseMove(nFlags, point);
}

void VDateTimeEdit::PreSubclassWindow() 
{
    SetDateTime(COleDateTime::GetCurrentTime());
    CEdit::PreSubclassWindow();
}

void VDateTimeEdit::SetDateTime(COleDateTime dt)
{
    CString str;
    int i, n = m_strMask.GetLength();
    for (i = 0; i < n; i++) {
        CString s;
        int val;
        TCHAR c = m_strMask[i];
        switch (c) {
            case 'D':case 'M':case 'Y':case 'h':case 'm':case 's':
                for (; i < n; i++) {
                    if (m_strMask[i] == c) s += c;
                    else {i--; break;}
                }
                break;
            default :
                break;
        }
        CString format;
        format.Format("%%0%dd", s.GetLength());
        switch (c) {
            case 'D':
                val = dt.GetDay();
                ::VSetInRange(val, 0, 31);
                s.Format(format, val);
                break;
            case 'M':
                val = dt.GetMonth();
                ::VSetInRange(val, 1, 12);
                s.Format(format, val);
                break;
            case 'Y':
                val = dt.GetYear();
                ::VSetInRange(val, 1900, 9990);
                s.Format(format, val);
                break;
            case 'h':
                val = dt.GetHour();
                ::VSetInRange(val, 0, 23);
                s.Format(format, val);
                break;
            case 'm':
                val = dt.GetMinute();
                ::VSetInRange(val, 0, 59);
                s.Format(format, val);
                break;
            case 's':
                val = dt.GetSecond();
                ::VSetInRange(val, 0, 59);
                s.Format(format, val);
                break;
            default :
                s = c;
                break;
        }
        str += s;
    }
    int pos;
    GetSel(pos, pos);
    SetWindowText(str);
    SetSel(pos, pos);
    CWnd *pOwner = GetParent();
    if (pOwner != NULL) 
      pOwner->PostMessage(WM_DATETIME_EDIT, 
                  (WPARAM)DTE_DATETIMECHANGED, (LPARAM)0);
}

COleDateTime VDateTimeEdit::GetDateTime()
{
    CString str;
    GetWindowText(str);
    return GetDateTime(str);
}

COleDateTime VDateTimeEdit::GetDateTime(CString str)
{
    tm t;
    COleDateTime dt;
    dt.SetStatus(COleDateTime::invalid);
    CTime::GetCurrentTime().GetLocalTm(&t);
    t.tm_mon += 1;
    t.tm_year += 1900;

    int i, n = m_strMask.GetLength();
    for (i = 0; i < n; i++) {
        CString s;
        TCHAR c = m_strMask[i];
        switch (c) {
            case 'D':case 'M':case 'Y':case 'h':case 'm':case 's':
                for ( ; i < n; i++) {
                    if (str.GetLength() <= s.GetLength()) break;
                    if (m_strMask[i] == c) s += str[s.GetLength()];
                    else {i--; break;}
                }
                break;
            default :
                if (str.GetLength() < 0 || str[0] != (s = c)) return dt;
                break;
        }
        str = str.Right(str.GetLength() - s.GetLength());
        int val;
        switch (c) {
            case 'D':
                if (!::VAtoi(s, val)) return dt;
                ::VSetInRange(val, 1, 31);
                t.tm_mday = val;
                break;
            case 'M':
                if (!::VAtoi(s, val)) return dt;
                ::VSetInRange(val, 1, 12);
                t.tm_mon = val;
                break;
            case 'Y':
                if (!::VAtoi(s, val)) return dt;
                ::VSetInRange(val, 1900, 9990);
                t.tm_year = val;
                break;
            case 'h':
                if (!::VAtoi(s, val)) return dt;
                ::VSetInRange(val, 0, 23);
                t.tm_hour = val;
                break;
            case 'm':
                if (!::VAtoi(s, val)) return dt;
                ::VSetInRange(val, 0, 59);
                t.tm_min = val;
                break;
            case 's':
                if (!::VAtoi(s, val)) return dt;
                ::VSetInRange(val, 0, 59);
                t.tm_sec = val;
                break;
            default :
                break;
        }
    }
    dt.SetStatus(COleDateTime::valid);
    dt.SetDateTime(t.tm_year, t.tm_mon, 
            t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec);
    return dt;
}

void VDateTimeEdit::OnContextMenu(CWnd*, CPoint)
{
}

void VDateTimeEdit::SetMask(CString mask) {
    COleDateTime time = GetDateTime();
    m_strMask = mask;
    SetDateTime(time);
}

That's it!

License

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About the Author

Tri VU KHAC

Belgium Belgium
No Biography provided

Comments and Discussions

 
GeneralTo the Author of this project Pin
cweng2003 at 3-May-03 19:28
membercweng20033-May-03 19:28 
GeneralThank you very much Pin
Albert Hermann at 13-Feb-03 2:33
memberAlbert Hermann13-Feb-03 2:33 
GeneralProblem when something selected Pin
mordred at 8-Oct-02 0:34
sussmordred8-Oct-02 0:34 
GeneralProblem when something selected Pin
mordred at 8-Oct-02 0:01
sussmordred8-Oct-02 0:01 
GeneralInitialize in GetDateTime Pin
cf at 12-Jul-02 9:26
susscf12-Jul-02 9:26 
GeneralNot able to create Pin
Anonymous at 12-Apr-02 0:34
memberAnonymous12-Apr-02 0:34 
GeneralRe: Not able to create Pin
TMS_73 at 11-Nov-03 4:00
memberTMS_7311-Nov-03 4:00 
QuestionWhat about adding Spin Button? Pin
Anonymous at 11-Oct-01 1:40
memberAnonymous11-Oct-01 1:40 
AnswerRe: What about adding Spin Button? Pin
Olivier Zegdoun at 15-Aug-02 13:03
memberOlivier Zegdoun15-Aug-02 13:03 
GeneralRe: What about adding Spin Button? Pin
Tommy Keegan at 6-Aug-06 18:18
memberTommy Keegan6-Aug-06 18:18 
GeneralClean, simple and versatile Pin
Rod Hamilton at 11-Jul-01 15:04
memberRod Hamilton11-Jul-01 15:04 
GeneralPerfect for my needs Pin
Trevor Ash at 7-Apr-01 8:19
memberTrevor Ash7-Apr-01 8:19 
GeneralA version of the date/time entry field that doesn't use OLE Pin
Peter Kovach at 9-Jun-00 6:50
sussPeter Kovach9-Jun-00 6:50 
GeneralSource Code Pin
Some programmer at 28-Mar-00 16:02
sussSome programmer28-Mar-00 16:02 

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