datectlg.cpp

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    wxClientDC dc(yearControl);
    dc.SetFont(yearControl->GetFont());
    wxCoord width, dummy;
    dc.GetTextExtent(wxT("2000"), &width, &dummy);
    width += ConvertDialogToPixels(wxSize(20, 0)).x;

    wxSize calSize = m_cal->GetBestSize();
    wxSize yearSize = yearControl->GetSize();
    yearSize.x = width;

    wxPoint yearPosition = yearControl->GetPosition();

    SetFormat(wxT("%x"));

    width = yearPosition.x + yearSize.x+2+CALBORDER/2;
    if (width < calSize.x-4)
        width = calSize.x-4;

    int calPos = (width-calSize.x)/2;
    if (calPos == -1)
    {
        calPos = 0;
        width += 2;
    }
    m_cal->SetSize(calPos, 0, calSize.x, calSize.y);
    yearControl->SetSize(width-yearSize.x-CALBORDER/2, yearPosition.y,
                         yearSize.x, yearSize.y);
    m_cal->GetMonthControl()->Move(0, 0);



    panel->SetClientSize(width+CALBORDER/2, calSize.y-2+CALBORDER);
    m_popup->SetClientSize(panel->GetSize());
    m_popup->Hide();

    SetValue(date.IsValid() ? date : wxDateTime::Today());

    SetBestFittingSize(size);

    SetBackgroundColour(m_txt->GetBackgroundColour());

    return true;
}


void wxDatePickerCtrlGeneric::Init()
{
    m_popup = NULL;
    m_txt = NULL;
    m_cal = NULL;
    m_btn = NULL;

    m_dropped = false;
    m_ignoreDrop = false;
}

wxDatePickerCtrlGeneric::~wxDatePickerCtrlGeneric()
{
    m_popup = NULL;
    m_txt = NULL;
    m_cal = NULL;
    m_btn = NULL;
}

bool wxDatePickerCtrlGeneric::Destroy()
{
    if (m_cal)
        m_cal->Destroy();
    if (m_popup)
        m_popup->Destroy();
    if (m_txt)
        m_txt->Destroy();
    if (m_btn)
        m_btn->Destroy();

    m_popup = NULL;
    m_txt = NULL;
    m_cal = NULL;
    m_btn = NULL;

    return wxControl::Destroy();
}

// ----------------------------------------------------------------------------
// overridden base class methods
// ----------------------------------------------------------------------------

void wxDatePickerCtrlGeneric::DoMoveWindow(int x, int y, int w, int h)
{
    wxControl::DoMoveWindow(x, y, w, h);

    if (m_dropped)
        DropDown(true);
}

wxSize wxDatePickerCtrlGeneric::DoGetBestSize() const
{
    int bh=m_btn->GetBestSize().y;
    int eh=m_txt->GetBestSize().y;
    return wxSize(DEFAULT_ITEM_WIDTH, bh > eh ? bh : eh);
}


bool wxDatePickerCtrlGeneric::Show(bool show)
{
    if ( !wxControl::Show(show) )
    {
        return false;
    }

    if ( !show )
    {
        if ( m_popup )
        {
            m_popup->Hide();
            m_dropped = false;
        }
    }

    return true;
}


bool wxDatePickerCtrlGeneric::Enable(bool enable)
{
    if ( !wxControl::Enable(enable) )
    {
        return false;
    }

    if ( !enable )
    {
        if ( m_popup )
            m_popup->Hide();
    }

    if ( m_btn )
        m_btn->Enable(enable);

    return true;
}

// ----------------------------------------------------------------------------
// wxDatePickerCtrlGeneric API
// ----------------------------------------------------------------------------

bool
wxDatePickerCtrlGeneric::SetDateRange(const wxDateTime& lowerdate,
                                      const wxDateTime& upperdate)
{
    return m_cal->SetDateRange(lowerdate, upperdate);
}

bool wxDatePickerCtrlGeneric::SetFormat(const wxChar *fmt)
{
    wxDateTime dt;
    dt.ParseFormat(wxT("2003-10-13"), wxT("%Y-%m-%d"));
    wxString str=dt.Format(fmt);
    wxChar *p=(wxChar*)str.c_str();

    m_format=wxEmptyString;

    while (*p)
    {
        int n=wxAtoi(p);
        if (n == dt.GetDay())
        {
            m_format.Append(wxT("%d"));
            p += 2;
        }
        else if (n == (int)dt.GetMonth()+1)
        {
            m_format.Append(wxT("%m"));
            p += 2;
        }
        else if (n == dt.GetYear())
        {
            m_format.Append(wxT("%Y"));
            p += 4;
        }
        else if (n == (dt.GetYear() % 100))
        {
            if (GetWindowStyle() & wxDP_SHOWCENTURY)
                m_format.Append(wxT("%Y"));
            else
                m_format.Append(wxT("%y"));
            p += 2;
        }
        else
            m_format.Append(*p++);
    }

    if (m_txt)
    {
        wxArrayString allowedChars;
        for ( wxChar c = _T('0'); c <= _T('9'); c++ )
            allowedChars.Add(wxString(c, 1));

        const wxChar *p = m_format.c_str();
        while (*p)
        {
            if (*p == '%')
                p += 2;
            else
                allowedChars.Add(wxString(*p++, 1));
        }

#if wxUSE_VALIDATORS
        wxTextValidator tv(wxFILTER_INCLUDE_CHAR_LIST);
        tv.SetIncludes(allowedChars);
        m_txt->SetValidator(tv);
#endif

        if (m_currentDate.IsValid())
            m_txt->SetValue(m_currentDate.Format(m_format));
    }

    return true;
}


wxDateTime wxDatePickerCtrlGeneric::GetValue() const
{
    return m_currentDate;
}


void wxDatePickerCtrlGeneric::SetValue(const wxDateTime& date)
{
    if ( !m_cal ) 
        return;

    // we need to suppress the event sent from wxTextCtrl as calling our
    // SetValue() should not result in an event being sent (wxTextCtrl is
    // an exception to this rule)
    gs_inSetValue = this;

    if ( date.IsValid() )
    {
        m_txt->SetValue(date.Format(m_format));
    }
    else // invalid date
    {
        wxASSERT_MSG( HasFlag(wxDP_ALLOWNONE),
                        _T("this control must have a valid date") );

        m_txt->SetValue(wxEmptyString);
    }

    gs_inSetValue = NULL;

    m_currentDate = date;
}


bool wxDatePickerCtrlGeneric::GetRange(wxDateTime *dt1, wxDateTime *dt2) const
{
    if (dt1)
        *dt1 = m_cal->GetLowerDateLimit();
    if (dt1)
        *dt2 = m_cal->GetUpperDateLimit();
    return true;
}


void
wxDatePickerCtrlGeneric::SetRange(const wxDateTime &dt1, const wxDateTime &dt2)
{
    m_cal->SetDateRange(dt1, dt2);
}

// ----------------------------------------------------------------------------
// event handlers
// ----------------------------------------------------------------------------

void wxDatePickerCtrlGeneric::DropDown(bool down)
{
    if (m_popup)
    {
        if (down)
        {
            wxDateTime dt;
            if (!m_txt->GetValue().empty())
                dt.ParseFormat(m_txt->GetValue(), m_format);

            if (dt.IsValid())
                m_cal->SetDate(dt);
            else
                m_cal->SetDate(wxDateTime::Today());

            wxPoint pos=GetParent()->ClientToScreen(GetPosition());
            m_popup->ShowAt(pos.x, pos.y + GetSize().y);
            m_dropped = true;
            m_cal->SetFocus();
        }
        else
        {
            if (m_dropped)
                m_popup->Hide();
            m_dropped = false;
        }
    }
}


void wxDatePickerCtrlGeneric::OnSize(wxSizeEvent& event)
{
    if ( m_btn )
    {
        wxSize sz = GetClientSize();

        wxSize bs=m_btn->GetSize();
        int eh=m_txt->GetBestSize().y;

        m_txt->SetSize(0, TXTPOSY, sz.x-bs.x, sz.y > eh ? eh-TXTPOSY : sz.y-TXTPOSY);
        m_btn->SetSize(sz.x - bs.x, 0, bs.x, sz.y);
    }

    event.Skip();
}


void wxDatePickerCtrlGeneric::OnChildSetFocus(wxChildFocusEvent &ev)
{
    ev.Skip();
    m_ignoreDrop = false;

    wxWindow  *w=(wxWindow*)ev.GetEventObject();
    while (w)
    {
        if (w == m_popup)
            return;
        w = w->GetParent();
    }

    if (m_dropped)
    {
        DropDown(false);
        if (::wxFindWindowAtPoint(::wxGetMousePosition()) == m_btn)
            m_ignoreDrop = true;
    }
}


void wxDatePickerCtrlGeneric::OnClick(wxCommandEvent& WXUNUSED(event))
{
    if (m_ignoreDrop)
    {
        m_ignoreDrop = false;
        m_txt->SetFocus();
    }
    else
    {
        DropDown();
        m_cal->SetFocus();
    }
}


void wxDatePickerCtrlGeneric::OnSetFocus(wxFocusEvent& WXUNUSED(ev))
{
    if (m_txt)
    {
        m_txt->SetFocus();
        m_txt->SetSelection(-1, -1); // select everything
    }
}


void wxDatePickerCtrlGeneric::OnKillFocus(wxFocusEvent &ev)
{
    if (!m_txt)
        return;
    
    ev.Skip();

    wxDateTime dt;
    dt.ParseFormat(m_txt->GetValue(), m_format);
    if ( !dt.IsValid() )
    {
        if ( !HasFlag(wxDP_ALLOWNONE) )
            dt = m_currentDate;
    }

    if(dt.IsValid())
        m_txt->SetValue(dt.Format(m_format));
    else
        m_txt->SetValue(wxEmptyString);

    // notify that we had to change the date after validation
    if ( (dt.IsValid() && (!m_currentDate.IsValid() || m_currentDate != dt)) ||
            (!dt.IsValid() && m_currentDate.IsValid()) )
    {
        m_currentDate = dt;
        wxDateEvent event(this, dt, wxEVT_DATE_CHANGED);
        GetEventHandler()->ProcessEvent(event);
    }
}


void wxDatePickerCtrlGeneric::OnSelChange(wxCalendarEvent &ev)
{
    if (m_cal)
    {
        m_currentDate = m_cal->GetDate();
        m_txt->SetValue(m_currentDate.Format(m_format));
        if (ev.GetEventType() == wxEVT_CALENDAR_DOUBLECLICKED)
        {
            DropDown(false);
            m_txt->SetFocus();
        }
    }
    ev.SetEventObject(this);
    ev.SetId(GetId());
    GetParent()->ProcessEvent(ev);

    wxDateEvent dev(this, ev.GetDate(), wxEVT_DATE_CHANGED);
    GetParent()->ProcessEvent(dev);
}


void wxDatePickerCtrlGeneric::OnText(wxCommandEvent &ev)
{
    if ( gs_inSetValue )
    {
        // artificial event resulting from our own SetValue() call, ignore it
        return;
    }

    ev.SetEventObject(this);
    ev.SetId(GetId());
    GetParent()->ProcessEvent(ev);

    // We'll create an additional event if the date is valid.
    // If the date isn't valid, the user's probably in the middle of typing
    wxString txt = m_txt->GetValue();
    wxDateTime dt;
    if (!txt.empty())
    {
        dt.ParseFormat(txt, m_format);
        if (!dt.IsValid())
            return;
    }

    wxCalendarEvent cev(m_cal, wxEVT_CALENDAR_SEL_CHANGED);
    cev.SetEventObject(this);
    cev.SetId(GetId());
    cev.SetDate(dt);

    GetParent()->ProcessEvent(cev);

    wxDateEvent dev(this, dt, wxEVT_DATE_CHANGED);
    GetParent()->ProcessEvent(dev);
}


void wxDatePickerCtrlGeneric::OnEditKey(wxKeyEvent & ev)
{
    if (ev.GetKeyCode() == WXK_DOWN && !ev.HasModifiers())
        DropDown(true);
    else
        ev.Skip();
}


void wxDatePickerCtrlGeneric::OnCalKey(wxKeyEvent & ev)
{
    if (ev.GetKeyCode() == WXK_ESCAPE && !ev.HasModifiers())
        DropDown(false);
    else
        ev.Skip();
}

#endif // wxUSE_DATEPICKCTRL_GENERIC

#endif // wxUSE_DATEPICKCTRL