initialize backing store bitmap in Create(), notebook doesn't always get a size event...

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35121 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/msw/notebook.cpp b/src/msw/notebook.cpp
index 46abba6daa5955e51e2fdadf66db6ff3623ea6cf..6f474aed5fa9350ef4224f8513fcc6bf96f616ec 100644 (file)
--- a/src/msw/notebook.cpp
+++ b/src/msw/notebook.cpp
@@ -345,6 +345,11 @@ bool wxNotebook::Create(wxWindow *parent,
     {
         SetBackgroundColour(GetThemeBackgroundColour());
     }
+    else // use themed background by default
+    {
+        // create backing store
+        UpdateBgBrush();
+    }
 #endif // wxUSE_UXTHEME
 
     // Undocumented hack to get flat notebook style