initial native implementation of wxCalendarCtrl for MSW

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53002 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/private/datecontrols.h

@@ -0,0 +1,51 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        msw/private/datecontrols.h
+// Purpose:     implementation helpers for wxDatePickerCtrl and wxCalendarCtrl
+// Author:      Vadim Zeitlin
+// Created:     2008-04-04
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _MSW_PRIVATE_DATECONTROLS_H_
+#define _MSW_PRIVATE_DATECONTROLS_H_
+
+// namespace for the helper functions related to the date controls
+namespace wxMSWDateControls
+{
+
+// do the one time only initialization of date classes of comctl32.dll, return
+// true if ok or log an error and return false if we failed (this can only
+// happen with a very old version of common controls DLL, i.e. before 4.70)
+extern bool CheckInitialization();
+
+// convert SYSTEMTIME to wxDateTime
+inline void FromSystemTime(wxDateTime *dt, const SYSTEMTIME& st)
+{
+    dt->Set(st.wDay,
+            wx_static_cast(wxDateTime::Month, wxDateTime::Jan + st.wMonth - 1),
+            st.wYear,
+            0, 0, 0);
+}
+
+// convert wxDateTime to SYSTEMTIME
+inline void ToSystemTime(SYSTEMTIME *st, const wxDateTime& dt)
+{
+    const wxDateTime::Tm tm(dt.GetTm());
+
+    st->wYear = (WXWORD)tm.year;
+    st->wMonth = (WXWORD)(tm.mon - wxDateTime::Jan + 1);
+    st->wDay = tm.mday;
+
+    st->wDayOfWeek =
+    st->wHour =
+    st->wMinute =
+    st->wSecond =
+    st->wMilliseconds = 0;
+}
+
+} // namespace wxMSWDateControls
+
+#endif // _MSW_PRIVATE_DATECONTROLS_H_
+