use wxDP_SPIN by default under Win32

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31500 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/datectrl.tex

@@ -40,7 +40,8 @@ components. This style is not supported by the generic version.}
 \twocolitem{\windowstyle{wxDP\_DROPDOWN}}{Creates a control with a month
 calendar drop down part from which the user can select a date.}
 \twocolitem{\windowstyle{wxDP\_DEFAULT}}{Creates a control with default style
-which is the best supported for the current platform.}
+which is the best supported for the current platform (currently wxDP\_SPIN
+under Windows and wxDP\_DROPDOWN elsewhere).}
 \end{twocollist}
 
 \wxheading{Event handling}

src/msw/datectrl.cpp

@@ -82,6 +82,10 @@ wxDatePickerCtrl::Create(wxWindow *parent,
                          const wxValidator& validator,
                          const wxString& name)
 {
+    // use wxDP_SPIN if wxDP_DEFAULT (0) was given as style
+    if ( !(style & wxDP_DROPDOWN) )
+        style |= wxDP_SPIN;
+
     // initialize the base class
     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
         return false;