Convert FWL_SCBCODE to an enum class

xfa/fwl/core/ifwl_scrollbar.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_CORE_IFWL_SCROLLBAR_H_
 #define XFA_FWL_CORE_IFWL_SCROLLBAR_H_
 
 #include "core/fxcrt/fx_system.h"
 #include "xfa/fwl/core/cfwl_widgetproperties.h"
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/ifwl_timer.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 class IFWL_Widget;
 
 #define FWL_STYLEEXT_SCB_Horz (0L << 0)
 #define FWL_STYLEEXT_SCB_Vert (1L << 0)
 
-enum FWL_SCBCODE {
-  FWL_SCBCODE_None = 1,
-  FWL_SCBCODE_Min,
-  FWL_SCBCODE_Max,
-  FWL_SCBCODE_PageBackward,
-  FWL_SCBCODE_PageForward,
-  FWL_SCBCODE_StepBackward,
-  FWL_SCBCODE_StepForward,
-  FWL_SCBCODE_Pos,
-  FWL_SCBCODE_TrackPos,
-  FWL_SCBCODE_EndScroll,
-};
-
 class IFWL_ScrollBarDP : public IFWL_DataProvider {};
 
 class IFWL_ScrollBar : public IFWL_Widget {
  public:
   IFWL_ScrollBar(const IFWL_App* app,
                  std::unique_ptr<CFWL_WidgetProperties> properties,
                  IFWL_Widget* pOuter);
   ~IFWL_ScrollBar() override;
 
   // IFWL_Widget
@@ skipping 51 matching lines @@
   void Layout();
   void CalcButtonLen();
   void CalcMinButtonRect(CFX_RectF& rect);
   void CalcMaxButtonRect(CFX_RectF& rect);
   void CalcThumbButtonRect(CFX_RectF& rect);
   void CalcMinTrackRect(CFX_RectF& rect);
   void CalcMaxTrackRect(CFX_RectF& rect);
   FX_FLOAT GetTrackPointPos(FX_FLOAT fx, FX_FLOAT fy);
   void GetTrackRect(CFX_RectF& rect, bool bLower = true);
   bool SendEvent();
-  bool OnScroll(uint32_t dwCode, FX_FLOAT fPos);
+  bool OnScroll(FWL_SCBCODE dwCode, FX_FLOAT fPos);
   void OnLButtonDown(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy);
   void OnLButtonUp(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy);
   void OnMouseMove(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy);
   void OnMouseLeave();
   void OnMouseWheel(FX_FLOAT fx,
                     FX_FLOAT fy,
                     uint32_t dwFlags,
                     FX_FLOAT fDeltaX,
                     FX_FLOAT fDeltaY);
-  bool DoScroll(uint32_t dwCode, FX_FLOAT fPos = 0.0f);
+  bool DoScroll(FWL_SCBCODE dwCode, FX_FLOAT fPos = 0.0f);
   void DoMouseDown(int32_t iItem,
                    const CFX_RectF& rtItem,
                    int32_t& iState,
                    FX_FLOAT fx,
                    FX_FLOAT fy);
   void DoMouseUp(int32_t iItem,
                  const CFX_RectF& rtItem,
                  int32_t& iState,
                  FX_FLOAT fx,
                  FX_FLOAT fy);
@@ skipping 29 matching lines @@
   CFX_RectF m_rtMinBtn;
   CFX_RectF m_rtMaxBtn;
   CFX_RectF m_rtMinTrack;
   CFX_RectF m_rtMaxTrack;
   bool m_bCustomLayout;
   FX_FLOAT m_fMinThumb;
   IFWL_ScrollBar::Timer m_Timer;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_SCROLLBAR_H_