Refactor wxDatePickerCtrl to derive from wxDateTimePickerCtrl.

No real changes, just refactor wxMSW wxDatePickerCtrl to allow sharing code
with the upcoming wxTimePickerCtrl class. Even less changes for the other
platforms where wxDateTimePickerCtrl is trivial.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69222 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/datetimectrl.h

@@ -0,0 +1,65 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/datetimectrl.h
+// Purpose:     wxDateTimePickerCtrl for Windows.
+// Author:      Vadim Zeitlin
+// Created:     2011-09-22 (extracted from wx/msw/datectrl.h).
+// RCS-ID:      $Id$
+// Copyright:   (c) 2005-2011 Vadim Zeitlin <vadim@wxwindows.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MSW_DATETIMECTRL_H_
+#define _WX_MSW_DATETIMECTRL_H_
+
+#include "wx/intl.h"
+
+// Forward declare a struct from Platform SDK.
+struct tagNMDATETIMECHANGE;
+
+// ----------------------------------------------------------------------------
+// wxDateTimePickerCtrl
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_ADV wxDateTimePickerCtrl : public wxDateTimePickerCtrlBase
+{
+public:
+    // set/get the date
+    virtual void SetValue(const wxDateTime& dt);
+    virtual wxDateTime GetValue() const;
+
+    // returns true if the platform should explicitly apply a theme border
+    virtual bool CanApplyThemeBorder() const { return false; }
+
+    virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
+
+protected:
+    virtual wxBorder GetDefaultBorder() const { return wxBORDER_NONE; }
+    virtual wxSize DoGetBestSize() const;
+
+    // Helper for the derived classes Create(): creates a native control with
+    // the specified attributes.
+    bool MSWCreateDateTimePicker(wxWindow *parent,
+                                 wxWindowID id,
+                                 const wxDateTime& dt,
+                                 const wxPoint& pos,
+                                 const wxSize& size,
+                                 long style,
+                                 const wxValidator& validator,
+                                 const wxString& name);
+
+    // Override to return the date/time format used by this control.
+    virtual wxLocaleInfo MSWGetFormat() const = 0;
+
+    // Override to indicate whether we can have no date at all.
+    virtual bool MSWAllowsNone() const = 0;
+
+    // Override to update m_date and send the event when the control contents
+    // changes, return true if the event was handled.
+    virtual bool MSWOnDateTimeChange(const tagNMDATETIMECHANGE& dtch) = 0;
+
+
+    // the date currently shown by the control, may be invalid
+    wxDateTime m_date;
+};
+
+#endif // _WX_MSW_DATETIMECTRL_H_