Merge delegates into IFWL_* classes.

xfa/fwl/core/ifwl_spinbutton.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_SPINBUTTON_H_
 #define XFA_FWL_CORE_IFWL_SPINBUTTON_H_
 
 #include "xfa/fwl/core/cfwl_event.h"
 #include "xfa/fwl/core/ifwl_timer.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxfa/cxfa_eventparam.h"
 
 #define FWL_STYLEEXE_SPB_Vert (1L << 0)
 
 class CFWL_MsgMouse;
-class CFWL_SpinButtonImpDelegate;
 class CFWL_WidgetImpProperties;
 
 FWL_EVENT_DEF(CFWL_EvtSpbClick, CFWL_EventType::Click, FX_BOOL m_bUp;)
 
 class IFWL_SpinButton : public IFWL_Widget {
  public:
   explicit IFWL_SpinButton(const IFWL_App* app,
                            const CFWL_WidgetImpProperties& properties);
   ~IFWL_SpinButton() override;
 
   // IFWL_Widget
   FWL_Type GetClassID() const 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;
+  void OnProcessMessage(CFWL_Message* pMessage) override;
+  void OnProcessEvent(CFWL_Event* pEvent) override;
+  void OnDrawWidget(CFX_Graphics* pGraphics,
+                    const CFX_Matrix* pMatrix) override;
 
   FWL_Error EnableButton(FX_BOOL bEnable, FX_BOOL bUp = TRUE);
   FX_BOOL IsButtonEnable(FX_BOOL bUp = TRUE);
 
  protected:
-  friend class CFWL_SpinButtonImpDelegate;
-
   class Timer : public IFWL_Timer {
    public:
     explicit Timer(IFWL_SpinButton* pToolTip);
     ~Timer() override {}
 
     void Run(IFWL_TimerInfo* pTimerInfo) override;
   };
   friend class IFWL_SpinButton::Timer;
 
   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;
   IFWL_TimerInfo* m_pTimerInfo;
   IFWL_SpinButton::Timer m_Timer;
-};
 
-class CFWL_SpinButtonImpDelegate : public CFWL_WidgetImpDelegate {
- public:
-  CFWL_SpinButtonImpDelegate(IFWL_SpinButton* pOwner);
-  void OnProcessMessage(CFWL_Message* pMessage) override;
-  void OnProcessEvent(CFWL_Event* pEvent) override;
-  void OnDrawWidget(CFX_Graphics* pGraphics,
-                    const CFX_Matrix* pMatrix = nullptr) override;
-
- protected:
-  void OnFocusChanged(CFWL_Message* pMsg, FX_BOOL bSet = TRUE);
+ private:
+  void OnFocusChanged(CFWL_Message* pMsg, FX_BOOL bSet);
   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);
-  IFWL_SpinButton* m_pOwner;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_SPINBUTTON_H_