diff --git a/include/wx/gtk/animate.h b/include/wx/gtk/animate.h
index 8a568a7057..20ff1d4edd 100644
--- a/include/wx/gtk/animate.h
+++ b/include/wx/gtk/animate.h
@@ -95,8 +95,6 @@ public:
         Create(parent, id, anim, pos, size, style, name);
     }
 
-    void Init();
-
     bool Create(wxWindow *parent, wxWindowID id,
                 const wxAnimation& anim = wxNullAnimation,
                 const wxPoint& pos = wxDefaultPosition,
@@ -146,6 +144,9 @@ protected:      // internal vars
 
 private:
     typedef wxAnimationCtrlBase base_type;
+
+    void Init();
+
     DECLARE_DYNAMIC_CLASS(wxAnimationCtrl)
     DECLARE_EVENT_TABLE()
 };
diff --git a/include/wx/gtk/collpane.h b/include/wx/gtk/collpane.h
index 78c4f26648..f0b6af1ab0 100644
--- a/include/wx/gtk/collpane.h
+++ b/include/wx/gtk/collpane.h
@@ -35,11 +35,6 @@ public:
         Create(parent, winid, label, pos, size, style, val, name);
     }
 
-    void Init()
-    {
-        m_bIgnoreNextChange = false;
-    }
-
     bool Create(wxWindow *parent,
                 wxWindowID winid,
                 const wxString& label,
@@ -69,6 +64,11 @@ public:     // used by GTK callbacks
     wxString m_strLabel;
 
 private:
+    void Init()
+    {
+        m_bIgnoreNextChange = false;
+    }
+
     void OnSize(wxSizeEvent&);
     virtual void AddChildGTK(wxWindowGTK* child);
     GdkWindow *GTKGetWindow(wxArrayGdkWindows& windows) const;
diff --git a/include/wx/gtk/dataobj2.h b/include/wx/gtk/dataobj2.h
index 7629027b33..27fb43eb53 100644
--- a/include/wx/gtk/dataobj2.h
+++ b/include/wx/gtk/dataobj2.h
@@ -49,7 +49,6 @@ public:
     }
 
 protected:
-    void Init() { m_pngData = NULL; m_pngSize = 0; }
     void Clear() { free(m_pngData); }
     void ClearAll() { Clear(); Init(); }
 
@@ -57,6 +56,9 @@ protected:
     void       *m_pngData;
 
     void DoConvertToPng();
+
+private:
+    void Init() { m_pngData = NULL; m_pngSize = 0; }
 };
 
 // ----------------------------------------------------------------------------
diff --git a/include/wx/gtk/dcscreen.h b/include/wx/gtk/dcscreen.h
index e5c1fea746..83084aeadc 100644
--- a/include/wx/gtk/dcscreen.h
+++ b/include/wx/gtk/dcscreen.h
@@ -25,7 +25,7 @@ public:
 
     virtual void DoGetSize(int *width, int *height) const;
 
-protected:
+private:
     void Init();
 
     DECLARE_ABSTRACT_CLASS(wxScreenDCImpl)
diff --git a/include/wx/gtk/dvrenderers.h b/include/wx/gtk/dvrenderers.h
index 9901bec0cb..b9119a9533 100644
--- a/include/wx/gtk/dvrenderers.h
+++ b/include/wx/gtk/dvrenderers.h
@@ -142,10 +142,9 @@ public:
 
     virtual GtkCellRendererText *GtkGetTextRenderer() const;
 
-protected:
+private:
     bool Init(wxDataViewCellMode mode, int align);
 
-private:
     // Called from GtkGetTextRenderer() to really create the renderer if
     // necessary.
     void GtkInitTextRenderer();
diff --git a/include/wx/gtk/filectrl.h b/include/wx/gtk/filectrl.h
index 8147b79bc0..0af8939ee7 100644
--- a/include/wx/gtk/filectrl.h
+++ b/include/wx/gtk/filectrl.h
@@ -90,7 +90,6 @@ public:
 
     virtual ~wxGtkFileCtrl() {}
 
-    void Init();
     bool Create( wxWindow *parent,
                  wxWindowID id,
                  const wxString& defaultDirectory = wxEmptyString,
@@ -134,6 +133,9 @@ protected:
     wxGtkFileChooser    m_fc;
     wxString            m_wildCard;
 
+private:
+    void Init();
+
     DECLARE_DYNAMIC_CLASS( wxGtkFileCtrl )
 };
 
diff --git a/include/wx/gtk/filepicker.h b/include/wx/gtk/filepicker.h
index 51ef90f66b..68a59090e0 100644
--- a/include/wx/gtk/filepicker.h
+++ b/include/wx/gtk/filepicker.h
@@ -176,13 +176,6 @@ public:     // overrides
     FILEDIRBTN_OVERRIDES
 
 protected:
-    // common part of all ctors
-    void Init()
-    {
-        m_dialog = NULL;
-        m_bIgnoreNextChange = false;
-    }
-
     wxDialog *m_dialog;
 
 public:    // used by the GTK callback only
@@ -192,6 +185,12 @@ public:    // used by the GTK callback only
     void GTKUpdatePath(const char *gtkpath);
 
 private:
+    void Init()
+    {
+        m_dialog = NULL;
+        m_bIgnoreNextChange = false;
+    }
+
     DECLARE_DYNAMIC_CLASS(wxDirButton)
 };
 
diff --git a/include/wx/gtk/font.h b/include/wx/gtk/font.h
index 41c19a63f2..bb0c5ec7b0 100644
--- a/include/wx/gtk/font.h
+++ b/include/wx/gtk/font.h
@@ -119,15 +119,14 @@ public:
 protected:
     virtual void DoSetNativeFontInfo( const wxNativeFontInfo& info );
 
-    // common part of all ctors
-    void Init();
-
     virtual wxGDIRefData* CreateGDIRefData() const;
     virtual wxGDIRefData* CloneGDIRefData(const wxGDIRefData* data) const;
 
     virtual wxFontFamily DoGetFamily() const;
 
 private:
+    void Init();
+
     DECLARE_DYNAMIC_CLASS(wxFont)
 };
 
diff --git a/include/wx/gtk/frame.h b/include/wx/gtk/frame.h
index f65f85ee62..397ad76c56 100644
--- a/include/wx/gtk/frame.h
+++ b/include/wx/gtk/frame.h
@@ -64,9 +64,6 @@ public:
     virtual bool SendIdleEvents(wxIdleEvent& event);
 
 protected:
-    // common part of all ctors
-    void Init();
-
     // override wxWindow methods to take into account tool/menu/statusbars
     virtual void DoGetClientSize( int *width, int *height ) const;
 
@@ -76,6 +73,8 @@ protected:
 #endif // wxUSE_MENUS_NATIVE
 
 private:
+    void Init();
+
     long m_fsSaveFlag;
 
     DECLARE_DYNAMIC_CLASS(wxFrame)
diff --git a/include/wx/gtk/gauge.h b/include/wx/gtk/gauge.h
index 728d6b7782..53c2cea372 100644
--- a/include/wx/gtk/gauge.h
+++ b/include/wx/gtk/gauge.h
@@ -71,15 +71,14 @@ public:
         m_gaugePos;
 
 protected:
-    // common part of all ctors
-    void Init() { m_rangeMax = m_gaugePos = 0; }
-
     // set the gauge value to the value of m_gaugePos
     void DoSetGauge();
 
     virtual wxSize DoGetBestSize() const;
 
 private:
+    void Init() { m_rangeMax = m_gaugePos = 0; }
+
     DECLARE_DYNAMIC_CLASS(wxGauge)
 };
 
diff --git a/include/wx/gtk/mdi.h b/include/wx/gtk/mdi.h
index dcb4b01d15..761f7758ac 100644
--- a/include/wx/gtk/mdi.h
+++ b/include/wx/gtk/mdi.h
@@ -67,11 +67,11 @@ public:
     virtual void OnInternalIdle();
 
 protected:
-    void Init();
     virtual void DoGetClientSize(int* width, int* height) const;
 
 private:
     friend class wxMDIChildFrame;
+    void Init();
 
     DECLARE_DYNAMIC_CLASS(wxMDIParentFrame)
 };
diff --git a/include/wx/gtk/notebook.h b/include/wx/gtk/notebook.h
index 2d116acdd0..878bbc4dd3 100644
--- a/include/wx/gtk/notebook.h
+++ b/include/wx/gtk/notebook.h
@@ -107,9 +107,6 @@ public:
     bool DoPhase(int phase);
 #endif
 
-    // common part of all ctors
-    void Init();
-
     // Called by GTK event handler when the current page is definitely changed.
     void GTKOnPageChanged();
 
@@ -138,6 +135,7 @@ private:
     // the padding set by SetPadding()
     int m_padding;
 
+    void Init();
     virtual void AddChildGTK(wxWindowGTK* child);
 
     DECLARE_DYNAMIC_CLASS(wxNotebook)
diff --git a/include/wx/gtk/textctrl.h b/include/wx/gtk/textctrl.h
index 336a5cfa2e..5d061c5b33 100644
--- a/include/wx/gtk/textctrl.h
+++ b/include/wx/gtk/textctrl.h
@@ -158,9 +158,6 @@ protected:
     virtual void DoFreeze();
     virtual void DoThaw();
 
-    // common part of all ctors
-    void Init();
-
     // Widgets that use the style->base colour for the BG colour should
     // override this and return true.
     virtual bool UseGTKStyleBase() const { return true; }
@@ -179,6 +176,8 @@ protected:
     void GTKSetJustification();
 
 private:
+    void Init();
+
     // overridden wxTextEntry virtual methods
     virtual GtkEditable *GetEditable() const;
     virtual GtkEntry *GetEntry() const;
diff --git a/include/wx/gtk/toplevel.h b/include/wx/gtk/toplevel.h
index 1b69ba287b..768f2e14f5 100644
--- a/include/wx/gtk/toplevel.h
+++ b/include/wx/gtk/toplevel.h
@@ -128,9 +128,6 @@ protected:
     virtual void DoSetSizeHints( int minW, int minH,
                                  int maxW, int maxH,
                                  int incW, int incH);
-    // common part of all ctors
-    void Init();
-
     // move the window to the specified location and resize it
     virtual void DoMoveWindow(int x, int y, int width, int height);
 
@@ -148,6 +145,7 @@ protected:
     bool m_deferShow;
 
 private:
+    void Init();
     wxSize& GetCachedDecorSize();
 
     // size hint increments