Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/fwl_spinbuttonimp.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef XFA_FWL_BASEWIDGET_FWL_SPINBUTTONIMP_H_
 #define XFA_FWL_BASEWIDGET_FWL_SPINBUTTONIMP_H_
 
 #include "xfa/fwl/core/fwl_widgetimp.h"
 #include "xfa/fwl/core/ifwl_timer.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 class CFWL_MsgMouse;
 class CFWL_SpinButtonImpDelegate;
 class CFWL_WidgetImpProperties;
 
 class CFWL_SpinButtonImp : public CFWL_WidgetImp, public IFWL_Timer {
  public:
   CFWL_SpinButtonImp(const CFWL_WidgetImpProperties& properties,
                      IFWL_Widget* pOuter);
-  ~CFWL_SpinButtonImp();
-  virtual FWL_Error GetClassName(CFX_WideString& wsClass) const;
-  virtual uint32_t GetClassID() const;
-  virtual FWL_Error Initialize();
-  virtual FWL_Error Finalize();
-  virtual FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
-  virtual FWL_Error Update();
-  virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
-  virtual FWL_Error DrawWidget(CFX_Graphics* pGraphics,
-                               const CFX_Matrix* pMatrix = NULL);
-  virtual int32_t Run(FWL_HTIMER hTimer);
+  ~CFWL_SpinButtonImp() override;
+
+  // CFWL_WidgetImp
+  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
+  FWL_Type GetClassID() const override;
+  FWL_Error Initialize() override;
+  FWL_Error Finalize() override;
+  FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
+  FWL_Error Update() override;
+  FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
+  FWL_Error DrawWidget(CFX_Graphics* pGraphics,
+                       const CFX_Matrix* pMatrix = nullptr) override;
+
+  // IFWL_Timer
+  int32_t Run(FWL_HTIMER hTimer) override;
+
   FWL_Error EnableButton(FX_BOOL bEnable, FX_BOOL bUp = TRUE);
   FX_BOOL IsButtonEnable(FX_BOOL bUp = TRUE);
 
  protected:
+  friend class CFWL_SpinButtonImpDelegate;
+
   void DrawUpButton(CFX_Graphics* pGraphics,
                     IFWL_ThemeProvider* pTheme,
                     const CFX_Matrix* pMatrix);
   void DrawDownButton(CFX_Graphics* pGraphics,
                       IFWL_ThemeProvider* pTheme,
                       const CFX_Matrix* pMatrix);
+
   CFX_RectF m_rtClient;
   CFX_RectF m_rtUpButton;
   CFX_RectF m_rtDnButton;
   uint32_t m_dwUpState;
   uint32_t m_dwDnState;
   int32_t m_iButtonIndex;
   FX_BOOL m_bLButtonDwn;
   FWL_HTIMER m_hTimer;
-  friend class CFWL_SpinButtonImpDelegate;
 };
 class CFWL_SpinButtonImpDelegate : public CFWL_WidgetImpDelegate {
  public:
   CFWL_SpinButtonImpDelegate(CFWL_SpinButtonImp* pOwner);
   void OnProcessMessage(CFWL_Message* pMessage) override;
   void OnProcessEvent(CFWL_Event* pEvent) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix = NULL) override;
 
  protected:
   void OnFocusChanged(CFWL_Message* pMsg, FX_BOOL bSet = TRUE);
   void OnLButtonDown(CFWL_MsgMouse* pMsg);
   void OnLButtonUp(CFWL_MsgMouse* pMsg);
   void OnMouseMove(CFWL_MsgMouse* pMsg);
   void OnMouseLeave(CFWL_MsgMouse* pMsg);
   void OnKeyDown(CFWL_MsgKey* pMsg);
   CFWL_SpinButtonImp* m_pOwner;
 };
 
 #endif  // XFA_FWL_BASEWIDGET_FWL_SPINBUTTONIMP_H_