minimize overlay area to avoid eg scrolling artifacts when using a caret

[wxWidgets.git] / src / msw / datectrl.cpp

diff --git a/src/msw/datectrl.cpp b/src/msw/datectrl.cpp
index 2af227ee9d5a0055db24eb6ecc82603d42186224..c9129f87565be99bb5679012dc028edd206d74ec 100644 (file)
--- a/src/msw/datectrl.cpp
+++ b/src/msw/datectrl.cpp
@@ -26,11 +26,11 @@
 #if wxUSE_DATEPICKCTRL
 
 #ifndef WX_PRECOMP
+    #include "wx/msw/wrapwin.h"
+    #include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
     #include "wx/app.h"
     #include "wx/intl.h"
     #include "wx/dcclient.h"
-    #include "wx/msw/wrapwin.h"
-    #include "wx/msw/wrapcctl.h"
     #include "wx/msw/private.h"
 #endif
 
@@ -253,10 +253,13 @@ void wxDatePickerCtrl::SetValue(const wxDateTime& dt)
     {
         wxLogDebug(_T("DateTime_SetSystemtime() failed"));
     }
+
+    m_date = dt;
 }
 
 wxDateTime wxDatePickerCtrl::GetValue() const
 {
+#ifdef __WXDEBUG__
     wxDateTime dt;
     SYSTEMTIME st;
     if ( DateTime_GetSystemtime(GetHwnd(), &st) == GDT_VALID )
@@ -264,7 +267,12 @@ wxDateTime wxDatePickerCtrl::GetValue() const
         wxFromSystemTime(&dt, st);
     }
 
-    return dt;
+    wxASSERT_MSG( m_date.IsValid() == dt.IsValid() &&
+                    (!dt.IsValid() || dt == m_date),
+                  _T("bug in wxDatePickerCtrl: m_date not in sync") );
+#endif // __WXDEBUG__
+
+    return m_date;
 }
 
 void wxDatePickerCtrl::SetRange(const wxDateTime& dt1, const wxDateTime& dt2)
@@ -331,11 +339,17 @@ wxDatePickerCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             if ( dtch->dwFlags == GDT_VALID )
                 wxFromSystemTime(&dt, dtch->st);
 
-            wxDateEvent event(this, dt, wxEVT_DATE_CHANGED);
-            if ( GetEventHandler()->ProcessEvent(event) )
+            // filter out duplicate DTN_DATETIMECHANGE events which the native
+            // control sends us when using wxDP_DROPDOWN style
+            if ( !m_date.IsValid() || dt != m_date )
             {
-                *result = 0;
-                return true;
+                m_date = dt;
+                wxDateEvent event(this, dt, wxEVT_DATE_CHANGED);
+                if ( GetEventHandler()->ProcessEvent(event) )
+                {
+                    *result = 0;
+                    return true;
+                }
             }
         }
     }