diff --git a/fpdfsdk/formfiller/cffl_button.cpp b/fpdfsdk/formfiller/cffl_button.cpp
new file mode 100644
index 0000000..2a290ed
--- /dev/null
+++ b/fpdfsdk/formfiller/cffl_button.cpp
@@ -0,0 +1,101 @@
+// Copyright 2017 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
+
+#include "fpdfsdk/formfiller/cffl_button.h"
+
+CFFL_Button::CFFL_Button(CPDFSDK_FormFillEnvironment* pApp,
+                         CPDFSDK_Widget* pWidget)
+    : CFFL_FormFiller(pApp, pWidget), m_bMouseIn(false), m_bMouseDown(false) {}
+
+CFFL_Button::~CFFL_Button() {}
+
+void CFFL_Button::OnMouseEnter(CPDFSDK_PageView* pPageView,
+                               CPDFSDK_Annot* pAnnot) {
+  m_bMouseIn = true;
+  InvalidateRect(GetViewBBox(pPageView, pAnnot));
+}
+
+void CFFL_Button::OnMouseExit(CPDFSDK_PageView* pPageView,
+                              CPDFSDK_Annot* pAnnot) {
+  m_bMouseIn = false;
+  InvalidateRect(GetViewBBox(pPageView, pAnnot));
+  EndTimer();
+  ASSERT(m_pWidget);
+}
+
+bool CFFL_Button::OnLButtonDown(CPDFSDK_PageView* pPageView,
+                                CPDFSDK_Annot* pAnnot,
+                                uint32_t nFlags,
+                                const CFX_PointF& point) {
+  if (!pAnnot->GetRect().Contains(point))
+    return false;
+
+  m_bMouseDown = true;
+  m_bValid = true;
+  InvalidateRect(GetViewBBox(pPageView, pAnnot));
+  return true;
+}
+
+bool CFFL_Button::OnLButtonUp(CPDFSDK_PageView* pPageView,
+                              CPDFSDK_Annot* pAnnot,
+                              uint32_t nFlags,
+                              const CFX_PointF& point) {
+  if (!pAnnot->GetRect().Contains(point))
+    return false;
+
+  m_bMouseDown = false;
+  m_pWidget->GetPDFPage();
+  InvalidateRect(GetViewBBox(pPageView, pAnnot));
+  return true;
+}
+
+bool CFFL_Button::OnMouseMove(CPDFSDK_PageView* pPageView,
+                              CPDFSDK_Annot* pAnnot,
+                              uint32_t nFlags,
+                              const CFX_PointF& point) {
+  return true;
+}
+
+void CFFL_Button::OnDraw(CPDFSDK_PageView* pPageView,
+                         CPDFSDK_Annot* pAnnot,
+                         CFX_RenderDevice* pDevice,
+                         CFX_Matrix* pUser2Device) {
+  ASSERT(pPageView);
+  CPDFSDK_Widget* pWidget = static_cast<CPDFSDK_Widget*>(pAnnot);
+  CPDF_FormControl* pCtrl = pWidget->GetFormControl();
+  if (pCtrl->GetHighlightingMode() != CPDF_FormControl::Push) {
+    pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
+    return;
+  }
+  if (m_bMouseDown) {
+    if (pWidget->IsWidgetAppearanceValid(CPDF_Annot::Down)) {
+      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Down, nullptr);
+    } else {
+      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal,
+                              nullptr);
+    }
+    return;
+  }
+  if (m_bMouseIn) {
+    if (pWidget->IsWidgetAppearanceValid(CPDF_Annot::Rollover)) {
+      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Rollover,
+                              nullptr);
+    } else {
+      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal,
+                              nullptr);
+    }
+    return;
+  }
+
+  pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
+}
+
+void CFFL_Button::OnDrawDeactive(CPDFSDK_PageView* pPageView,
+                                 CPDFSDK_Annot* pAnnot,
+                                 CFX_RenderDevice* pDevice,
+                                 CFX_Matrix* pUser2Device) {
+  OnDraw(pPageView, pAnnot, pDevice, pUser2Device);
+}
diff --git a/fpdfsdk/formfiller/cffl_button.h b/fpdfsdk/formfiller/cffl_button.h
new file mode 100644
index 0000000..37c294d
--- /dev/null
+++ b/fpdfsdk/formfiller/cffl_button.h
@@ -0,0 +1,56 @@
+// Copyright 2017 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 FPDFSDK_FORMFILLER_CFFL_BUTTON_H_
+#define FPDFSDK_FORMFILLER_CFFL_BUTTON_H_
+
+#include "core/fxcrt/fx_coordinates.h"
+#include "fpdfsdk/formfiller/cffl_formfiller.h"
+
+class CFX_RenderDevice;
+class CFX_Matrix;
+class CPDFSDK_Annot;
+class CPDFSDK_FormFillEnvironment;
+class CPDFSDK_PageView;
+class CPDFSDK_Widget;
+
+class CFFL_Button : public CFFL_FormFiller {
+ public:
+  CFFL_Button(CPDFSDK_FormFillEnvironment* pFormFillEnv,
+              CPDFSDK_Widget* pWidget);
+  ~CFFL_Button() override;
+
+  // CFFL_FormFiller
+  void OnMouseEnter(CPDFSDK_PageView* pPageView,
+                    CPDFSDK_Annot* pAnnot) override;
+  void OnMouseExit(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot) override;
+  bool OnLButtonDown(CPDFSDK_PageView* pPageView,
+                     CPDFSDK_Annot* pAnnot,
+                     uint32_t nFlags,
+                     const CFX_PointF& point) override;
+  bool OnLButtonUp(CPDFSDK_PageView* pPageView,
+                   CPDFSDK_Annot* pAnnot,
+                   uint32_t nFlags,
+                   const CFX_PointF& point) override;
+  bool OnMouseMove(CPDFSDK_PageView* pPageView,
+                   CPDFSDK_Annot* pAnnot,
+                   uint32_t nFlags,
+                   const CFX_PointF& point) override;
+  void OnDraw(CPDFSDK_PageView* pPageView,
+              CPDFSDK_Annot* pAnnot,
+              CFX_RenderDevice* pDevice,
+              CFX_Matrix* pUser2Device) override;
+  void OnDrawDeactive(CPDFSDK_PageView* pPageView,
+                      CPDFSDK_Annot* pAnnot,
+                      CFX_RenderDevice* pDevice,
+                      CFX_Matrix* pUser2Device) override;
+
+ private:
+  bool m_bMouseIn;
+  bool m_bMouseDown;
+};
+
+#endif  // FPDFSDK_FORMFILLER_CFFL_BUTTON_H_
diff --git a/fpdfsdk/formfiller/cffl_checkbox.h b/fpdfsdk/formfiller/cffl_checkbox.h
index f6c7172..f84fb3e 100644
--- a/fpdfsdk/formfiller/cffl_checkbox.h
+++ b/fpdfsdk/formfiller/cffl_checkbox.h
@@ -7,7 +7,7 @@
 #ifndef FPDFSDK_FORMFILLER_CFFL_CHECKBOX_H_
 #define FPDFSDK_FORMFILLER_CFFL_CHECKBOX_H_
 
-#include "fpdfsdk/formfiller/cffl_formfiller.h"
+#include "fpdfsdk/formfiller/cffl_button.h"
 
 class CPWL_CheckBox;
 
diff --git a/fpdfsdk/formfiller/cffl_formfiller.cpp b/fpdfsdk/formfiller/cffl_formfiller.cpp
index f45a52c..31f6963 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_formfiller.cpp
@@ -17,11 +17,13 @@
 #include "fpdfsdk/fsdk_common.h"
 #include "fpdfsdk/pdfwindow/cpwl_utils.h"
 
-#define GetRed(rgb) ((uint8_t)(rgb))
-#define GetGreen(rgb) ((uint8_t)(((uint16_t)(rgb)) >> 8))
-#define GetBlue(rgb) ((uint8_t)((rgb) >> 16))
+namespace {
 
-#define FFL_HINT_ELAPSE 800
+CPDFSDK_Widget* CPDFSDKAnnotToWidget(CPDFSDK_Annot* annot) {
+  return static_cast<CPDFSDK_Widget*>(annot);
+}
+
+}  // namespace
 
 CFFL_FormFiller::CFFL_FormFiller(CPDFSDK_FormFillEnvironment* pFormFillEnv,
                                  CPDFSDK_Widget* pWidget)
@@ -36,7 +38,8 @@
 void CFFL_FormFiller::DestroyWindows() {
   for (const auto& it : m_Maps) {
     CPWL_Wnd* pWnd = it.second;
-    CFFL_PrivateData* pData = (CFFL_PrivateData*)pWnd->GetAttachedData();
+    CFFL_PrivateData* pData =
+        static_cast<CFFL_PrivateData*>(pWnd->GetAttachedData());
     pWnd->InvalidateProvider(this);
     pWnd->Destroy();
     delete pWnd;
@@ -47,16 +50,13 @@
 
 void CFFL_FormFiller::SetWindowRect(CPDFSDK_PageView* pPageView,
                                     const CFX_FloatRect& rcWindow) {
-  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false)) {
+  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false))
     pWnd->Move(CFX_FloatRect(rcWindow), true, false);
-  }
 }
 
 CFX_FloatRect CFFL_FormFiller::GetWindowRect(CPDFSDK_PageView* pPageView) {
-  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false)) {
-    return pWnd->GetWindowRect();
-  }
-  return CFX_FloatRect();
+  CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false);
+  return pWnd ? pWnd->GetWindowRect() : CFX_FloatRect();
 }
 
 FX_RECT CFFL_FormFiller::GetViewBBox(CPDFSDK_PageView* pPageView,
@@ -65,21 +65,15 @@
   ASSERT(pAnnot);
 
   CFX_FloatRect rcAnnot = m_pWidget->GetRect();
-
-  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false)) {
-    CFX_FloatRect rcWindow = pWnd->GetWindowRect();
-    rcAnnot = PWLtoFFL(rcWindow);
-  }
+  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false))
+    rcAnnot = PWLtoFFL(pWnd->GetWindowRect());
 
   CFX_FloatRect rcWin = rcAnnot;
-
   CFX_FloatRect rcFocus = GetFocusBox(pPageView);
   if (!rcFocus.IsEmpty())
     rcWin.Union(rcFocus);
 
-  CFX_FloatRect rect = CPWL_Utils::InflateRect(rcWin, 1);
-
-  return rect.GetOuterRect();
+  return CPWL_Utils::InflateRect(rcWin, 1).GetOuterRect();
 }
 
 void CFFL_FormFiller::OnDraw(CPDFSDK_PageView* pPageView,
@@ -92,20 +86,22 @@
     CFX_Matrix mt = GetCurMatrix();
     mt.Concat(*pUser2Device);
     pWnd->DrawAppearance(pDevice, &mt);
-  } else {
-    CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
-    if (CFFL_InteractiveFormFiller::IsVisible(pWidget))
-      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal,
-                              nullptr);
+    return;
   }
+
+  CPDFSDK_Widget* pWidget = CPDFSDKAnnotToWidget(pAnnot);
+  if (!CFFL_InteractiveFormFiller::IsVisible(pWidget))
+    return;
+
+  pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
 }
 
 void CFFL_FormFiller::OnDrawDeactive(CPDFSDK_PageView* pPageView,
                                      CPDFSDK_Annot* pAnnot,
                                      CFX_RenderDevice* pDevice,
                                      CFX_Matrix* pUser2Device) {
-  CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
-  pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
+  CPDFSDKAnnotToWidget(pAnnot)->DrawAppearance(pDevice, pUser2Device,
+                                               CPDF_Annot::Normal, nullptr);
 }
 
 void CFFL_FormFiller::OnMouseEnter(CPDFSDK_PageView* pPageView,
@@ -262,12 +258,8 @@
     return;
 
   CPDFSDK_PageView* pPageView = GetCurPageView(false);
-  if (!pPageView)
+  if (!pPageView || !CommitData(pPageView, nFlag))
     return;
-
-  if (!CommitData(pPageView, nFlag))
-    return;
-
   if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false))
     pWnd->KillFocus();
 
@@ -297,26 +289,19 @@
 
   uint32_t dwCreateFlags = PWS_BORDER | PWS_BACKGROUND | PWS_VISIBLE;
   uint32_t dwFieldFlag = m_pWidget->GetFieldFlags();
-  if (dwFieldFlag & FIELDFLAG_READONLY) {
+  if (dwFieldFlag & FIELDFLAG_READONLY)
     dwCreateFlags |= PWS_READONLY;
-  }
 
   FX_COLORREF color;
-  if (m_pWidget->GetFillColor(color)) {
-    cp.sBackgroundColor =
-        CPWL_Color(GetRed(color), GetGreen(color), GetBlue(color));
-  }
-
-  if (m_pWidget->GetBorderColor(color)) {
-    cp.sBorderColor =
-        CPWL_Color(GetRed(color), GetGreen(color), GetBlue(color));
-  }
+  if (m_pWidget->GetFillColor(color))
+    cp.sBackgroundColor = CPWL_Color(color);
+  if (m_pWidget->GetBorderColor(color))
+    cp.sBorderColor = CPWL_Color(color);
 
   cp.sTextColor = CPWL_Color(COLORTYPE_GRAY, 0);
 
-  if (m_pWidget->GetTextColor(color)) {
-    cp.sTextColor = CPWL_Color(GetRed(color), GetGreen(color), GetBlue(color));
-  }
+  if (m_pWidget->GetTextColor(color))
+    cp.sTextColor = CPWL_Color(color);
 
   cp.fFontSize = m_pWidget->GetFontSize();
   cp.dwBorderWidth = m_pWidget->GetBorderWidth();
@@ -327,8 +312,6 @@
       cp.sDash = CPWL_Dash(3, 3, 0);
       break;
     case BorderStyle::BEVELED:
-      cp.dwBorderWidth *= 2;
-      break;
     case BorderStyle::INSET:
       cp.dwBorderWidth *= 2;
       break;
@@ -408,9 +391,6 @@
   CFX_Matrix mt;
   CFX_FloatRect rcDA = m_pWidget->GetPDFAnnot()->GetRect();
   switch (m_pWidget->GetRotate()) {
-    default:
-    case 0:
-      break;
     case 90:
       mt = CFX_Matrix(0, 1, -1, 0, rcDA.right - rcDA.left, 0);
       break;
@@ -421,6 +401,9 @@
     case 270:
       mt = CFX_Matrix(0, -1, 1, 0, 0, rcDA.top - rcDA.bottom);
       break;
+    case 0:
+    default:
+      break;
   }
   mt.e += rcDA.left;
   mt.f += rcDA.bottom;
@@ -444,13 +427,14 @@
 }
 
 CFX_FloatRect CFFL_FormFiller::GetFocusBox(CPDFSDK_PageView* pPageView) {
-  if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false)) {
-    CFX_FloatRect rcFocus = FFLtoWnd(pPageView, PWLtoFFL(pWnd->GetFocusRect()));
-    CFX_FloatRect rcPage = pPageView->GetPDFPage()->GetPageBBox();
-    if (rcPage.Contains(rcFocus))
-      return rcFocus;
-  }
-  return CFX_FloatRect();
+  CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false);
+  if (!pWnd)
+    return CFX_FloatRect();
+
+  CFX_FloatRect rcFocus = FFLtoWnd(pPageView, PWLtoFFL(pWnd->GetFocusRect()));
+  return pPageView->GetPDFPage()->GetPageBBox().Contains(rcFocus)
+             ? rcFocus
+             : CFX_FloatRect();
 }
 
 CFX_FloatRect CFFL_FormFiller::FFLtoPWL(const CFX_FloatRect& rect) {
@@ -484,38 +468,40 @@
 }
 
 bool CFFL_FormFiller::CommitData(CPDFSDK_PageView* pPageView, uint32_t nFlag) {
-  if (IsDataChanged(pPageView)) {
-    CFFL_InteractiveFormFiller* pFormFiller =
-        m_pFormFillEnv->GetInteractiveFormFiller();
-    CPDFSDK_Annot::ObservedPtr pObserved(m_pWidget.Get());
+  if (!IsDataChanged(pPageView))
+    return true;
 
-    if (!pFormFiller->OnKeyStrokeCommit(&pObserved, pPageView, nFlag)) {
-      if (!pObserved)
-        return false;
-      ResetPDFWindow(pPageView, false);
-      return true;
-    }
+  CFFL_InteractiveFormFiller* pFormFiller =
+      m_pFormFillEnv->GetInteractiveFormFiller();
+  CPDFSDK_Annot::ObservedPtr pObserved(m_pWidget.Get());
+
+  if (!pFormFiller->OnKeyStrokeCommit(&pObserved, pPageView, nFlag)) {
     if (!pObserved)
       return false;
-
-    if (!pFormFiller->OnValidate(&pObserved, pPageView, nFlag)) {
-      if (!pObserved)
-        return false;
-      ResetPDFWindow(pPageView, false);
-      return true;
-    }
-    if (!pObserved)
-      return false;
-
-    SaveData(pPageView);
-    pFormFiller->OnCalculate(&pObserved, pPageView, nFlag);
-    if (!pObserved)
-      return false;
-
-    pFormFiller->OnFormat(&pObserved, pPageView, nFlag);
-    if (!pObserved)
-      return false;
+    ResetPDFWindow(pPageView, false);
+    return true;
   }
+  if (!pObserved)
+    return false;
+
+  if (!pFormFiller->OnValidate(&pObserved, pPageView, nFlag)) {
+    if (!pObserved)
+      return false;
+    ResetPDFWindow(pPageView, false);
+    return true;
+  }
+  if (!pObserved)
+    return false;
+
+  SaveData(pPageView);
+  pFormFiller->OnCalculate(&pObserved, pPageView, nFlag);
+  if (!pObserved)
+    return false;
+
+  pFormFiller->OnFormat(&pObserved, pPageView, nFlag);
+  if (!pObserved)
+    return false;
+
   return true;
 }
 
@@ -578,97 +564,3 @@
 void CFFL_FormFiller::InvalidateRect(const FX_RECT& rect) {
   m_pFormFillEnv->Invalidate(m_pWidget->GetUnderlyingPage(), rect);
 }
-
-CFFL_Button::CFFL_Button(CPDFSDK_FormFillEnvironment* pApp,
-                         CPDFSDK_Widget* pWidget)
-    : CFFL_FormFiller(pApp, pWidget), m_bMouseIn(false), m_bMouseDown(false) {}
-
-CFFL_Button::~CFFL_Button() {}
-
-void CFFL_Button::OnMouseEnter(CPDFSDK_PageView* pPageView,
-                               CPDFSDK_Annot* pAnnot) {
-  m_bMouseIn = true;
-  InvalidateRect(GetViewBBox(pPageView, pAnnot));
-}
-
-void CFFL_Button::OnMouseExit(CPDFSDK_PageView* pPageView,
-                              CPDFSDK_Annot* pAnnot) {
-  m_bMouseIn = false;
-
-  InvalidateRect(GetViewBBox(pPageView, pAnnot));
-  EndTimer();
-  ASSERT(m_pWidget);
-}
-
-bool CFFL_Button::OnLButtonDown(CPDFSDK_PageView* pPageView,
-                                CPDFSDK_Annot* pAnnot,
-                                uint32_t nFlags,
-                                const CFX_PointF& point) {
-  if (!pAnnot->GetRect().Contains(point))
-    return false;
-
-  m_bMouseDown = true;
-  m_bValid = true;
-  InvalidateRect(GetViewBBox(pPageView, pAnnot));
-  return true;
-}
-
-bool CFFL_Button::OnLButtonUp(CPDFSDK_PageView* pPageView,
-                              CPDFSDK_Annot* pAnnot,
-                              uint32_t nFlags,
-                              const CFX_PointF& point) {
-  if (!pAnnot->GetRect().Contains(point))
-    return false;
-
-  m_bMouseDown = false;
-  m_pWidget->GetPDFPage();
-
-  InvalidateRect(GetViewBBox(pPageView, pAnnot));
-  return true;
-}
-
-bool CFFL_Button::OnMouseMove(CPDFSDK_PageView* pPageView,
-                              CPDFSDK_Annot* pAnnot,
-                              uint32_t nFlags,
-                              const CFX_PointF& point) {
-  return true;
-}
-
-void CFFL_Button::OnDraw(CPDFSDK_PageView* pPageView,
-                         CPDFSDK_Annot* pAnnot,
-                         CFX_RenderDevice* pDevice,
-                         CFX_Matrix* pUser2Device) {
-  ASSERT(pPageView);
-  CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
-  CPDF_FormControl* pCtrl = pWidget->GetFormControl();
-  CPDF_FormControl::HighlightingMode eHM = pCtrl->GetHighlightingMode();
-
-  if (eHM != CPDF_FormControl::Push) {
-    pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
-    return;
-  }
-
-  if (m_bMouseDown) {
-    if (pWidget->IsWidgetAppearanceValid(CPDF_Annot::Down))
-      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Down, nullptr);
-    else
-      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal,
-                              nullptr);
-  } else if (m_bMouseIn) {
-    if (pWidget->IsWidgetAppearanceValid(CPDF_Annot::Rollover))
-      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Rollover,
-                              nullptr);
-    else
-      pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal,
-                              nullptr);
-  } else {
-    pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
-  }
-}
-
-void CFFL_Button::OnDrawDeactive(CPDFSDK_PageView* pPageView,
-                                 CPDFSDK_Annot* pAnnot,
-                                 CFX_RenderDevice* pDevice,
-                                 CFX_Matrix* pUser2Device) {
-  OnDraw(pPageView, pAnnot, pDevice, pUser2Device);
-}
diff --git a/fpdfsdk/formfiller/cffl_formfiller.h b/fpdfsdk/formfiller/cffl_formfiller.h
index 2ddbdf2..3eedebe 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.h
+++ b/fpdfsdk/formfiller/cffl_formfiller.h
@@ -160,40 +160,4 @@
   CFX_PointF m_ptOldPos;
 };
 
-class CFFL_Button : public CFFL_FormFiller {
- public:
-  CFFL_Button(CPDFSDK_FormFillEnvironment* pFormFillEnv,
-              CPDFSDK_Widget* pWidget);
-  ~CFFL_Button() override;
-
-  // CFFL_FormFiller
-  void OnMouseEnter(CPDFSDK_PageView* pPageView,
-                    CPDFSDK_Annot* pAnnot) override;
-  void OnMouseExit(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot) override;
-  bool OnLButtonDown(CPDFSDK_PageView* pPageView,
-                     CPDFSDK_Annot* pAnnot,
-                     uint32_t nFlags,
-                     const CFX_PointF& point) override;
-  bool OnLButtonUp(CPDFSDK_PageView* pPageView,
-                   CPDFSDK_Annot* pAnnot,
-                   uint32_t nFlags,
-                   const CFX_PointF& point) override;
-  bool OnMouseMove(CPDFSDK_PageView* pPageView,
-                   CPDFSDK_Annot* pAnnot,
-                   uint32_t nFlags,
-                   const CFX_PointF& point) override;
-  void OnDraw(CPDFSDK_PageView* pPageView,
-              CPDFSDK_Annot* pAnnot,
-              CFX_RenderDevice* pDevice,
-              CFX_Matrix* pUser2Device) override;
-  void OnDrawDeactive(CPDFSDK_PageView* pPageView,
-                      CPDFSDK_Annot* pAnnot,
-                      CFX_RenderDevice* pDevice,
-                      CFX_Matrix* pUser2Device) override;
-
- protected:
-  bool m_bMouseIn;
-  bool m_bMouseDown;
-};
-
 #endif  // FPDFSDK_FORMFILLER_CFFL_FORMFILLER_H_
diff --git a/fpdfsdk/formfiller/cffl_pushbutton.h b/fpdfsdk/formfiller/cffl_pushbutton.h
index 334abc2..9ae4752 100644
--- a/fpdfsdk/formfiller/cffl_pushbutton.h
+++ b/fpdfsdk/formfiller/cffl_pushbutton.h
@@ -7,7 +7,7 @@
 #ifndef FPDFSDK_FORMFILLER_CFFL_PUSHBUTTON_H_
 #define FPDFSDK_FORMFILLER_CFFL_PUSHBUTTON_H_
 
-#include "fpdfsdk/formfiller/cffl_formfiller.h"
+#include "fpdfsdk/formfiller/cffl_button.h"
 
 class CFFL_PushButton : public CFFL_Button {
  public:
diff --git a/fpdfsdk/formfiller/cffl_radiobutton.h b/fpdfsdk/formfiller/cffl_radiobutton.h
index 29b7e38..981e2df 100644
--- a/fpdfsdk/formfiller/cffl_radiobutton.h
+++ b/fpdfsdk/formfiller/cffl_radiobutton.h
@@ -7,7 +7,7 @@
 #ifndef FPDFSDK_FORMFILLER_CFFL_RADIOBUTTON_H_
 #define FPDFSDK_FORMFILLER_CFFL_RADIOBUTTON_H_
 
-#include "fpdfsdk/formfiller/cffl_formfiller.h"
+#include "fpdfsdk/formfiller/cffl_button.h"
 
 class CPWL_RadioButton;