fixed bug with radiobox size being miscalculated if the label was too long

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7920 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/radiobox.h

@@ -100,8 +100,15 @@ public:
 #endif // WXWIN_COMPATIBILITY
 
 protected:
+    // subclass one radio button
     void SubclassRadioButton(WXHWND hWndBtn);
 
+    // get the max size of radio buttons
+    wxSize GetMaxButtonSize() const;
+
+    // get the total size occupied by the radio box buttons
+    wxSize GetTotalButtonSize(const wxSize& sizeBtn) const;
+
     WXHWND *          m_radioButtons;
     int               m_majorDim;
     int *             m_radioWidth;  // for bitmaps
@@ -114,6 +121,7 @@ protected:
     virtual void DoSetSize(int x, int y,
                            int width, int height,
                            int sizeFlags = wxSIZE_AUTO);
+    virtual wxSize DoGetBestSize() const;
 };
 
 #endif