Patch [ 588732 ] makes wxRB_GROUP/radiobuttons working

from Marcin Wojdyr (wojdyr)

Applied with some modifications (remove buttons from the chain on
destruction, or the program will segfault).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16382 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/motif/radiobut.h

@@ -26,6 +26,8 @@ class WXDLLEXPORT wxRadioButton: public wxControl
 protected:
 public:
     wxRadioButton();
+    ~wxRadioButton() { RemoveFromCycle(); }
+
     inline wxRadioButton(wxWindow *parent, wxWindowID id,
         const wxString& label,
         const wxPoint& pos = wxDefaultPosition,
@@ -52,6 +54,17 @@ public:
     virtual void ChangeFont(bool keepOriginalSize = TRUE);
     virtual void ChangeBackgroundColour();
     virtual void ChangeForegroundColour();
+
+    // *this function is an implementation detail*
+    // clears the selection in the readiobuttons in the cycle
+    // and returns the old selection (if any)
+    wxRadioButton* ClearSelections();
+private:
+    wxRadioButton* AddInCycle(wxRadioButton* cycle);
+    void RemoveFromCycle();
+    wxRadioButton* NextInCycle() { return m_cycle; }
+
+    wxRadioButton *m_cycle;
 };
 
 // Not implemented