Merge the CFWL_*Imp classes into the IFWL_* classes.

xfa/fwl/core/ifwl_listbox.cpp

 // 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
 
-#include "xfa/fwl/basewidget/fwl_listboximp.h"
+#include "xfa/fwl/core/ifwl_listbox.h"
 
 #include "xfa/fde/tto/fde_textout.h"
-#include "xfa/fwl/basewidget/fwl_comboboximp.h"
-#include "xfa/fwl/basewidget/fwl_scrollbarimp.h"
 #include "xfa/fwl/core/cfwl_message.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/cfwl_themepart.h"
 #include "xfa/fwl/core/cfwl_themetext.h"
-#include "xfa/fwl/core/fwl_widgetimp.h"
 #include "xfa/fwl/core/ifwl_app.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 
 namespace {
 
 const int kItemTextMargin = 2;
 
 }  // namespace
 
 // static
 IFWL_ListBox* IFWL_ListBox::Create(const CFWL_WidgetImpProperties& properties,
                                    IFWL_Widget* pOuter) {
-  IFWL_ListBox* pListBox = new IFWL_ListBox;
-  CFWL_ListBoxImp* pListBoxImpl = new CFWL_ListBoxImp(properties, pOuter);
-  pListBox->SetImpl(pListBoxImpl);
-  pListBoxImpl->SetInterface(pListBox);
-  return pListBox;
-}
-// static
-IFWL_ListBox* IFWL_ListBox::CreateComboList(
-    const CFWL_WidgetImpProperties& properties,
-    IFWL_Widget* pOuter) {
-  IFWL_ListBox* pListBox = new IFWL_ListBox;
-  CFWL_ListBoxImp* pComboListImpl = new CFWL_ComboListImp(properties, pOuter);
-  pListBox->SetImpl(pComboListImpl);
-  pComboListImpl->SetInterface(pListBox);
-  return pListBox;
-}
-IFWL_ListBox::IFWL_ListBox() {}
-int32_t IFWL_ListBox::CountSelItems() {
-  return static_cast<CFWL_ListBoxImp*>(GetImpl())->CountSelItems();
-}
-IFWL_ListItem* IFWL_ListBox::GetSelItem(int32_t nIndexSel) {
-  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetSelItem(nIndexSel);
-}
-int32_t IFWL_ListBox::GetSelIndex(int32_t nIndex) {
-  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetSelIndex(nIndex);
-}
-FWL_Error IFWL_ListBox::SetSelItem(IFWL_ListItem* pItem, FX_BOOL bSelect) {
-  return static_cast<CFWL_ListBoxImp*>(GetImpl())->SetSelItem(pItem, bSelect);
-}
-FWL_Error IFWL_ListBox::GetItemText(IFWL_ListItem* pItem,
-                                    CFX_WideString& wsText) {
-  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetItemText(pItem, wsText);
-}
-FWL_Error IFWL_ListBox::GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert) {
-  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetScrollPos(fPos, bVert);
+  return new IFWL_ListBox(properties, pOuter);
 }
 
-CFWL_ListBoxImp::CFWL_ListBoxImp(const CFWL_WidgetImpProperties& properties,
-                                 IFWL_Widget* pOuter)
-    : CFWL_WidgetImp(properties, pOuter),
+IFWL_ListBox::IFWL_ListBox(const CFWL_WidgetImpProperties& properties,
+                           IFWL_Widget* pOuter)
+    : IFWL_Widget(properties, pOuter),
       m_dwTTOStyles(0),
       m_iTTOAligns(0),
       m_hAnchor(nullptr),
       m_fScorllBarWidth(0),
       m_bLButtonDown(FALSE),
       m_pScrollBarTP(nullptr) {
   m_rtClient.Reset();
   m_rtConent.Reset();
   m_rtStatic.Reset();
 }
 
-CFWL_ListBoxImp::~CFWL_ListBoxImp() {}
+IFWL_ListBox::~IFWL_ListBox() {}
 
-FWL_Error CFWL_ListBoxImp::GetClassName(CFX_WideString& wsClass) const {
+FWL_Error IFWL_ListBox::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_ListBox;
   return FWL_Error::Succeeded;
 }
 
-FWL_Type CFWL_ListBoxImp::GetClassID() const {
+FWL_Type IFWL_ListBox::GetClassID() const {
   return FWL_Type::ListBox;
 }
 
-FWL_Error CFWL_ListBoxImp::Initialize() {
-  if (CFWL_WidgetImp::Initialize() != FWL_Error::Succeeded)
+FWL_Error IFWL_ListBox::Initialize() {
+  if (IFWL_Widget::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
 
   m_pDelegate = new CFWL_ListBoxImpDelegate(this);
   return FWL_Error::Succeeded;
 }
 
-FWL_Error CFWL_ListBoxImp::Finalize() {
+FWL_Error IFWL_ListBox::Finalize() {
   if (m_pVertScrollBar) {
     m_pVertScrollBar->Finalize();
   }
   if (m_pHorzScrollBar) {
     m_pHorzScrollBar->Finalize();
   }
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return CFWL_WidgetImp::Finalize();
+  return IFWL_Widget::Finalize();
 }
-FWL_Error CFWL_ListBoxImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
+
+FWL_Error IFWL_ListBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
     if (!m_pProperties->m_pThemeProvider) {
       m_pProperties->m_pThemeProvider = GetAvailableTheme();
     }
     CFX_SizeF fs = CalcSize(TRUE);
     rect.Set(0, 0, fs.x, fs.y);
-    CFWL_WidgetImp::GetWidgetRect(rect, TRUE);
+    IFWL_Widget::GetWidgetRect(rect, TRUE);
   } else {
     rect = m_pProperties->m_rtWidget;
   }
   return FWL_Error::Succeeded;
 }
-FWL_Error CFWL_ListBoxImp::Update() {
+
+FWL_Error IFWL_ListBox::Update() {
   if (IsLocked()) {
     return FWL_Error::Indefinite;
   }
   if (!m_pProperties->m_pThemeProvider) {
     m_pProperties->m_pThemeProvider = GetAvailableTheme();
   }
   m_iTTOAligns = FDE_TTOALIGNMENT_Center;
   switch (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_AlignMask) {
     case FWL_STYLEEXT_LTB_LeftAlign: {
       m_iTTOAligns = FDE_TTOALIGNMENT_CenterLeft;
       break;
     }
     case FWL_STYLEEXT_LTB_RightAlign: {
       m_iTTOAligns = FDE_TTOALIGNMENT_CenterRight;
       break;
     }
     case FWL_STYLEEXT_LTB_CenterAlign:
     default: { m_iTTOAligns = FDE_TTOALIGNMENT_Center; }
   }
   if (m_pProperties->m_dwStyleExes & FWL_WGTSTYLE_RTLReading) {
     m_dwTTOStyles |= FDE_TTOSTYLE_RTL;
   }
   m_dwTTOStyles |= FDE_TTOSTYLE_SingleLine;
   m_fScorllBarWidth = GetScrollWidth();
   CalcSize();
   return FWL_Error::Succeeded;
 }
-FWL_WidgetHit CFWL_ListBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+
+FWL_WidgetHit IFWL_ListBox::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (IsShowScrollBar(FALSE)) {
     CFX_RectF rect;
     m_pHorzScrollBar->GetWidgetRect(rect);
     if (rect.Contains(fx, fy))
       return FWL_WidgetHit::HScrollBar;
   }
   if (IsShowScrollBar(TRUE)) {
     CFX_RectF rect;
     m_pVertScrollBar->GetWidgetRect(rect);
     if (rect.Contains(fx, fy))
       return FWL_WidgetHit::VScrollBar;
   }
   if (m_rtClient.Contains(fx, fy))
     return FWL_WidgetHit::Client;
   return FWL_WidgetHit::Unknown;
 }
-FWL_Error CFWL_ListBoxImp::DrawWidget(CFX_Graphics* pGraphics,
-                                      const CFX_Matrix* pMatrix) {
+
+FWL_Error IFWL_ListBox::DrawWidget(CFX_Graphics* pGraphics,
+                                   const CFX_Matrix* pMatrix) {
   if (!pGraphics)
     return FWL_Error::Indefinite;
   if (!m_pProperties->m_pThemeProvider)
     return FWL_Error::Indefinite;
   IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
   pGraphics->SaveGraphState();
   if (HasBorder()) {
     DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
   }
   if (HasEdge()) {
@@ skipping 10 matching lines @@
     pMatrix->TransformRect(rtClip);
   }
   pGraphics->SetClipRect(rtClip);
   if ((m_pProperties->m_dwStyles & FWL_WGTSTYLE_NoBackground) == 0) {
     DrawBkground(pGraphics, pTheme, pMatrix);
   }
   DrawItems(pGraphics, pTheme, pMatrix);
   pGraphics->RestoreGraphState();
   return FWL_Error::Succeeded;
 }
-FWL_Error CFWL_ListBoxImp::SetThemeProvider(
-    IFWL_ThemeProvider* pThemeProvider) {
+
+FWL_Error IFWL_ListBox::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   if (!pThemeProvider)
     return FWL_Error::Indefinite;
   m_pProperties->m_pThemeProvider = pThemeProvider;
   return FWL_Error::Succeeded;
 }
-int32_t CFWL_ListBoxImp::CountSelItems() {
+int32_t IFWL_ListBox::CountSelItems() {
   if (!m_pProperties->m_pDataProvider)
     return 0;
   int32_t iRet = 0;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
+  int32_t iCount = pData->CountItems(this);
   for (int32_t i = 0; i < iCount; i++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    IFWL_ListItem* pItem = pData->GetItem(this, i);
     if (!pItem) {
       continue;
     }
-    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, pItem);
+    uint32_t dwStyle = pData->GetItemStyles(this, pItem);
     if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
       iRet++;
     }
   }
   return iRet;
 }
-IFWL_ListItem* CFWL_ListBoxImp::GetSelItem(int32_t nIndexSel) {
+
+IFWL_ListItem* IFWL_ListBox::GetSelItem(int32_t nIndexSel) {
   if (!m_pProperties->m_pDataProvider)
     return nullptr;
   int32_t index = 0;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
+  int32_t iCount = pData->CountItems(this);
   for (int32_t i = 0; i < iCount; i++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    IFWL_ListItem* pItem = pData->GetItem(this, i);
     if (!pItem) {
       return nullptr;
     }
-    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, pItem);
+    uint32_t dwStyle = pData->GetItemStyles(this, pItem);
     if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
       if (index == nIndexSel) {
         return pItem;
       } else {
         index++;
       }
     }
   }
   return nullptr;
 }
-int32_t CFWL_ListBoxImp::GetSelIndex(int32_t nIndex) {
+
+int32_t IFWL_ListBox::GetSelIndex(int32_t nIndex) {
   if (!m_pProperties->m_pDataProvider)
     return -1;
   int32_t index = 0;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
+  int32_t iCount = pData->CountItems(this);
   for (int32_t i = 0; i < iCount; i++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    IFWL_ListItem* pItem = pData->GetItem(this, i);
     if (!pItem) {
       return -1;
     }
-    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, pItem);
+    uint32_t dwStyle = pData->GetItemStyles(this, pItem);
     if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
       if (index == nIndex) {
         return i;
       } else {
         index++;
       }
     }
   }
   return -1;
 }
-FWL_Error CFWL_ListBoxImp::SetSelItem(IFWL_ListItem* pItem, FX_BOOL bSelect) {
+
+FWL_Error IFWL_ListBox::SetSelItem(IFWL_ListItem* pItem, FX_BOOL bSelect) {
   if (!m_pProperties->m_pDataProvider)
     return FWL_Error::Indefinite;
   if (!pItem) {
     if (bSelect) {
       SelectAll();
     } else {
       ClearSelection();
       SetFocusItem(nullptr);
     }
     return FWL_Error::Indefinite;
   }
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection) {
     SetSelectionDirect(pItem, bSelect);
   } else {
     SetSelection(pItem, pItem, bSelect);
   }
   return FWL_Error::Succeeded;
 }
-FWL_Error CFWL_ListBoxImp::GetItemText(IFWL_ListItem* pItem,
-                                       CFX_WideString& wsText) {
+
+FWL_Error IFWL_ListBox::GetItemText(IFWL_ListItem* pItem,
+                                    CFX_WideString& wsText) {
   if (!m_pProperties->m_pDataProvider)
     return FWL_Error::Indefinite;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   if (!pItem)
     return FWL_Error::Indefinite;
-  pData->GetItemText(m_pInterface, pItem, wsText);
+  pData->GetItemText(this, pItem, wsText);
   return FWL_Error::Succeeded;
 }
 
-FWL_Error CFWL_ListBoxImp::GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert) {
+FWL_Error IFWL_ListBox::GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert) {
   if ((bVert && IsShowScrollBar(TRUE)) || (!bVert && IsShowScrollBar(FALSE))) {
     IFWL_ScrollBar* pScrollBar =
         bVert ? m_pVertScrollBar.get() : m_pHorzScrollBar.get();
     fPos = pScrollBar->GetPos();
     return FWL_Error::Succeeded;
   }
   return FWL_Error::Indefinite;
 }
 
-IFWL_ListItem* CFWL_ListBoxImp::GetItem(IFWL_ListItem* pItem,
-                                        uint32_t dwKeyCode) {
+IFWL_ListItem* IFWL_ListBox::GetItem(IFWL_ListItem* pItem, uint32_t dwKeyCode) {
   IFWL_ListItem* hRet = nullptr;
   switch (dwKeyCode) {
     case FWL_VKEY_Up:
     case FWL_VKEY_Down:
     case FWL_VKEY_Home:
     case FWL_VKEY_End: {
       const bool bUp = dwKeyCode == FWL_VKEY_Up;
       const bool bDown = dwKeyCode == FWL_VKEY_Down;
       const bool bHome = dwKeyCode == FWL_VKEY_Home;
       IFWL_ListBoxDP* pData =
           static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
       int32_t iDstItem = -1;
       if (bUp || bDown) {
-        int32_t index = pData->GetItemIndex(m_pInterface, pItem);
+        int32_t index = pData->GetItemIndex(this, pItem);
         iDstItem = dwKeyCode == FWL_VKEY_Up ? index - 1 : index + 1;
       } else if (bHome) {
         iDstItem = 0;
       } else {
-        int32_t iCount = pData->CountItems(m_pInterface);
+        int32_t iCount = pData->CountItems(this);
         iDstItem = iCount - 1;
       }
-      hRet = pData->GetItem(m_pInterface, iDstItem);
+      hRet = pData->GetItem(this, iDstItem);
       break;
     }
     default: {}
   }
   return hRet;
 }
-void CFWL_ListBoxImp::SetSelection(IFWL_ListItem* hStart,
-                                   IFWL_ListItem* hEnd,
-                                   FX_BOOL bSelected) {
+
+void IFWL_ListBox::SetSelection(IFWL_ListItem* hStart,
+                                IFWL_ListItem* hEnd,
+                                FX_BOOL bSelected) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iStart = pData->GetItemIndex(m_pInterface, hStart);
-  int32_t iEnd = pData->GetItemIndex(m_pInterface, hEnd);
+  int32_t iStart = pData->GetItemIndex(this, hStart);
+  int32_t iEnd = pData->GetItemIndex(this, hEnd);
   if (iStart > iEnd) {
     int32_t iTemp = iStart;
     iStart = iEnd;
     iEnd = iTemp;
   }
   if (bSelected) {
-    int32_t iCount = pData->CountItems(m_pInterface);
+    int32_t iCount = pData->CountItems(this);
     for (int32_t i = 0; i < iCount; i++) {
-      IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+      IFWL_ListItem* pItem = pData->GetItem(this, i);
       SetSelectionDirect(pItem, FALSE);
     }
   }
   for (; iStart <= iEnd; iStart++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, iStart);
+    IFWL_ListItem* pItem = pData->GetItem(this, iStart);
     SetSelectionDirect(pItem, bSelected);
   }
 }
-void CFWL_ListBoxImp::SetSelectionDirect(IFWL_ListItem* pItem,
-                                         FX_BOOL bSelect) {
+
+void IFWL_ListBox::SetSelectionDirect(IFWL_ListItem* pItem, FX_BOOL bSelect) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  uint32_t dwOldStyle = pData->GetItemStyles(m_pInterface, pItem);
+  uint32_t dwOldStyle = pData->GetItemStyles(this, pItem);
   bSelect ? dwOldStyle |= FWL_ITEMSTATE_LTB_Selected
           : dwOldStyle &= ~FWL_ITEMSTATE_LTB_Selected;
-  pData->SetItemStyles(m_pInterface, pItem, dwOldStyle);
+  pData->SetItemStyles(this, pItem, dwOldStyle);
 }
-FX_BOOL CFWL_ListBoxImp::IsItemSelected(IFWL_ListItem* pItem) {
+
+FX_BOOL IFWL_ListBox::IsItemSelected(IFWL_ListItem* pItem) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  uint32_t dwState = pData->GetItemStyles(m_pInterface, pItem);
+  uint32_t dwState = pData->GetItemStyles(this, pItem);
   return (dwState & FWL_ITEMSTATE_LTB_Selected) != 0;
 }
-void CFWL_ListBoxImp::ClearSelection() {
+
+void IFWL_ListBox::ClearSelection() {
   FX_BOOL bMulti =
       m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
+  int32_t iCount = pData->CountItems(this);
   for (int32_t i = 0; i < iCount; i++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
-    uint32_t dwState = pData->GetItemStyles(m_pInterface, pItem);
+    IFWL_ListItem* pItem = pData->GetItem(this, i);
+    uint32_t dwState = pData->GetItemStyles(this, pItem);
     if (!(dwState & FWL_ITEMSTATE_LTB_Selected))
       continue;
     SetSelectionDirect(pItem, FALSE);
     if (!bMulti)
       return;
   }
 }
-void CFWL_ListBoxImp::SelectAll() {
+
+void IFWL_ListBox::SelectAll() {
   FX_BOOL bMulti =
       m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection;
   if (!bMulti) {
     return;
   }
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
+  int32_t iCount = pData->CountItems(this);
   if (iCount > 0) {
-    IFWL_ListItem* pItemStart = pData->GetItem(m_pInterface, 0);
-    IFWL_ListItem* pItemEnd = pData->GetItem(m_pInterface, iCount - 1);
+    IFWL_ListItem* pItemStart = pData->GetItem(this, 0);
+    IFWL_ListItem* pItemEnd = pData->GetItem(this, iCount - 1);
     SetSelection(pItemStart, pItemEnd, FALSE);
   }
 }
-IFWL_ListItem* CFWL_ListBoxImp::GetFocusedItem() {
+
+IFWL_ListItem* IFWL_ListBox::GetFocusedItem() {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
+  int32_t iCount = pData->CountItems(this);
   for (int32_t i = 0; i < iCount; i++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    IFWL_ListItem* pItem = pData->GetItem(this, i);
     if (!pItem)
       return nullptr;
-    if (pData->GetItemStyles(m_pInterface, pItem) & FWL_ITEMSTATE_LTB_Focused) {
+    if (pData->GetItemStyles(this, pItem) & FWL_ITEMSTATE_LTB_Focused) {
       return pItem;
     }
   }
   return nullptr;
 }
-void CFWL_ListBoxImp::SetFocusItem(IFWL_ListItem* pItem) {
+
+void IFWL_ListBox::SetFocusItem(IFWL_ListItem* pItem) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   IFWL_ListItem* hFocus = GetFocusedItem();
   if (pItem != hFocus) {
     if (hFocus) {
-      uint32_t dwStyle = pData->GetItemStyles(m_pInterface, hFocus);
+      uint32_t dwStyle = pData->GetItemStyles(this, hFocus);
       dwStyle &= ~FWL_ITEMSTATE_LTB_Focused;
-      pData->SetItemStyles(m_pInterface, hFocus, dwStyle);
+      pData->SetItemStyles(this, hFocus, dwStyle);
     }
     if (pItem) {
-      uint32_t dwStyle = pData->GetItemStyles(m_pInterface, pItem);
+      uint32_t dwStyle = pData->GetItemStyles(this, pItem);
       dwStyle |= FWL_ITEMSTATE_LTB_Focused;
-      pData->SetItemStyles(m_pInterface, pItem, dwStyle);
+      pData->SetItemStyles(this, pItem, dwStyle);
     }
   }
 }
-IFWL_ListItem* CFWL_ListBoxImp::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
+
+IFWL_ListItem* IFWL_ListBox::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
   fx -= m_rtConent.left, fy -= m_rtConent.top;
   FX_FLOAT fPosX = 0.0f;
   if (m_pHorzScrollBar) {
     fPosX = m_pHorzScrollBar->GetPos();
   }
   FX_FLOAT fPosY = 0.0;
   if (m_pVertScrollBar) {
     fPosY = m_pVertScrollBar->GetPos();
   }
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t nCount = pData->CountItems(m_pInterface);
+  int32_t nCount = pData->CountItems(this);
   for (int32_t i = 0; i < nCount; i++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    IFWL_ListItem* pItem = pData->GetItem(this, i);
     if (!pItem) {
       continue;
     }
     CFX_RectF rtItem;
-    pData->GetItemRect(m_pInterface, pItem, rtItem);
+    pData->GetItemRect(this, pItem, rtItem);
     rtItem.Offset(-fPosX, -fPosY);
     if (rtItem.Contains(fx, fy)) {
       return pItem;
     }
   }
   return nullptr;
 }
-FX_BOOL CFWL_ListBoxImp::GetItemCheckRect(IFWL_ListItem* pItem,
-                                          CFX_RectF& rtCheck) {
+
+FX_BOOL IFWL_ListBox::GetItemCheckRect(IFWL_ListItem* pItem,
+                                       CFX_RectF& rtCheck) {
   if (!m_pProperties->m_pDataProvider)
     return FALSE;
   if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check)) {
     return FALSE;
   }
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  pData->GetItemCheckRect(m_pInterface, pItem, rtCheck);
+  pData->GetItemCheckRect(this, pItem, rtCheck);
   return TRUE;
 }
-FX_BOOL CFWL_ListBoxImp::GetItemChecked(IFWL_ListItem* pItem) {
+
+FX_BOOL IFWL_ListBox::GetItemChecked(IFWL_ListItem* pItem) {
   if (!m_pProperties->m_pDataProvider)
     return FALSE;
   if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check)) {
     return FALSE;
   }
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  return (pData->GetItemCheckState(m_pInterface, pItem) &
-          FWL_ITEMSTATE_LTB_Checked);
+  return (pData->GetItemCheckState(this, pItem) & FWL_ITEMSTATE_LTB_Checked);
 }
-FX_BOOL CFWL_ListBoxImp::SetItemChecked(IFWL_ListItem* pItem,
-                                        FX_BOOL bChecked) {
+
+FX_BOOL IFWL_ListBox::SetItemChecked(IFWL_ListItem* pItem, FX_BOOL bChecked) {
   if (!m_pProperties->m_pDataProvider)
     return FALSE;
   if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check)) {
     return FALSE;
   }
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  pData->SetItemCheckState(m_pInterface, pItem,
+  pData->SetItemCheckState(this, pItem,
                            bChecked ? FWL_ITEMSTATE_LTB_Checked : 0);
   return TRUE;
 }
-FX_BOOL CFWL_ListBoxImp::ScrollToVisible(IFWL_ListItem* pItem) {
+
+FX_BOOL IFWL_ListBox::ScrollToVisible(IFWL_ListItem* pItem) {
   if (!m_pVertScrollBar)
     return FALSE;
   CFX_RectF rtItem;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  pData->GetItemRect(m_pInterface, pItem, rtItem);
+  pData->GetItemRect(this, pItem, rtItem);
   FX_BOOL bScroll = FALSE;
   FX_FLOAT fPosY = m_pVertScrollBar->GetPos();
   rtItem.Offset(0, -fPosY + m_rtConent.top);
   if (rtItem.top < m_rtConent.top) {
     fPosY += rtItem.top - m_rtConent.top;
     bScroll = TRUE;
   } else if (rtItem.bottom() > m_rtConent.bottom()) {
     fPosY += rtItem.bottom() - m_rtConent.bottom();
     bScroll = TRUE;
   }
   if (!bScroll) {
     return FALSE;
   }
   m_pVertScrollBar->SetPos(fPosY);
   m_pVertScrollBar->SetTrackPos(fPosY);
   Repaint(&m_rtClient);
   return TRUE;
 }
-void CFWL_ListBoxImp::DrawBkground(CFX_Graphics* pGraphics,
-                                   IFWL_ThemeProvider* pTheme,
-                                   const CFX_Matrix* pMatrix) {
+
+void IFWL_ListBox::DrawBkground(CFX_Graphics* pGraphics,
+                                IFWL_ThemeProvider* pTheme,
+                                const CFX_Matrix* pMatrix) {
   if (!pGraphics)
     return;
   if (!pTheme)
     return;
   CFWL_ThemeBackground param;
-  param.m_pWidget = m_pInterface;
+  param.m_pWidget = this;
   param.m_iPart = CFWL_Part::Background;
   param.m_dwStates = 0;
   param.m_pGraphics = pGraphics;
   param.m_matrix.Concat(*pMatrix);
   param.m_rtPart = m_rtClient;
   if (IsShowScrollBar(FALSE) && IsShowScrollBar(TRUE)) {
     param.m_pData = &m_rtStatic;
   }
   if (!IsEnabled()) {
     param.m_dwStates = CFWL_PartState_Disabled;
   }
   pTheme->DrawBackground(&param);
 }
-void CFWL_ListBoxImp::DrawItems(CFX_Graphics* pGraphics,
-                                IFWL_ThemeProvider* pTheme,
-                                const CFX_Matrix* pMatrix) {
+
+void IFWL_ListBox::DrawItems(CFX_Graphics* pGraphics,
+                             IFWL_ThemeProvider* pTheme,
+                             const CFX_Matrix* pMatrix) {
   FX_FLOAT fPosX = 0.0f;
   if (m_pHorzScrollBar) {
     fPosX = m_pHorzScrollBar->GetPos();
   }
   FX_FLOAT fPosY = 0.0f;
   if (m_pVertScrollBar) {
     fPosY = m_pVertScrollBar->GetPos();
   }
   CFX_RectF rtView(m_rtConent);
   if (m_pHorzScrollBar) {
     rtView.height -= m_fScorllBarWidth;
   }
   if (m_pVertScrollBar) {
     rtView.width -= m_fScorllBarWidth;
   }
   FX_BOOL bMultiCol =
       m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiColumn;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
+  int32_t iCount = pData->CountItems(this);
   for (int32_t i = 0; i < iCount; i++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    IFWL_ListItem* pItem = pData->GetItem(this, i);
     if (!pItem) {
       continue;
     }
     CFX_RectF rtItem;
-    pData->GetItemRect(m_pInterface, pItem, rtItem);
+    pData->GetItemRect(this, pItem, rtItem);
     rtItem.Offset(m_rtConent.left - fPosX, m_rtConent.top - fPosY);
     if (rtItem.bottom() < m_rtConent.top) {
       continue;
     }
     if (rtItem.top >= m_rtConent.bottom()) {
       break;
     }
     if (bMultiCol && rtItem.left > m_rtConent.right()) {
       break;
     }
     if (GetStylesEx() & FWL_STYLEEXT_LTB_OwnerDraw) {
       CFWL_EvtLtbDrawItem ev;
-      ev.m_pSrcTarget = m_pInterface;
+      ev.m_pSrcTarget = this;
       ev.m_pGraphics = pGraphics;
       ev.m_matrix = *pMatrix;
       ev.m_index = i;
       ev.m_rect = rtItem;
       DispatchEvent(&ev);
     } else {
       DrawItem(pGraphics, pTheme, pItem, i, rtItem, pMatrix);
     }
   }
 }
-void CFWL_ListBoxImp::DrawItem(CFX_Graphics* pGraphics,
-                               IFWL_ThemeProvider* pTheme,
-                               IFWL_ListItem* pItem,
-                               int32_t Index,
-                               const CFX_RectF& rtItem,
-                               const CFX_Matrix* pMatrix) {
+
+void IFWL_ListBox::DrawItem(CFX_Graphics* pGraphics,
+                            IFWL_ThemeProvider* pTheme,
+                            IFWL_ListItem* pItem,
+                            int32_t Index,
+                            const CFX_RectF& rtItem,
+                            const CFX_Matrix* pMatrix) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  uint32_t dwItemStyles = pData->GetItemStyles(m_pInterface, pItem);
+  uint32_t dwItemStyles = pData->GetItemStyles(this, pItem);
   uint32_t dwPartStates = CFWL_PartState_Normal;
   if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
     dwPartStates = CFWL_PartState_Disabled;
   } else if (dwItemStyles & FWL_ITEMSTATE_LTB_Selected) {
     dwPartStates = CFWL_PartState_Selected;
   }
   if (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused &&
       dwItemStyles & FWL_ITEMSTATE_LTB_Focused) {
     dwPartStates |= CFWL_PartState_Focused;
   }
   {
     CFWL_ThemeBackground param;
-    param.m_pWidget = m_pInterface;
+    param.m_pWidget = this;
     param.m_iPart = CFWL_Part::ListItem;
     param.m_dwStates = dwPartStates;
     param.m_pGraphics = pGraphics;
     param.m_matrix.Concat(*pMatrix);
     param.m_rtPart = rtItem;
     param.m_bMaximize = true;
     CFX_RectF rtFocus(rtItem);
     param.m_pData = &rtFocus;
     if (m_pVertScrollBar && !m_pHorzScrollBar &&
         (dwPartStates & CFWL_PartState_Focused)) {
       param.m_rtPart.left += 1;
       param.m_rtPart.width -= (m_fScorllBarWidth + 1);
       rtFocus.Deflate(0.5, 0.5, 1 + m_fScorllBarWidth, 1);
     }
     pTheme->DrawBackground(&param);
   }
   {
     FX_BOOL bHasIcon = GetStylesEx() & FWL_STYLEEXT_LTB_Icon;
     if (bHasIcon) {
       CFX_RectF rtDIB;
-      CFX_DIBitmap* pDib = pData->GetItemIcon(m_pInterface, pItem);
+      CFX_DIBitmap* pDib = pData->GetItemIcon(this, pItem);
       rtDIB.Set(rtItem.left, rtItem.top, rtItem.height, rtItem.height);
       if (pDib) {
         CFWL_ThemeBackground param;
-        param.m_pWidget = m_pInterface;
+        param.m_pWidget = this;
         param.m_iPart = CFWL_Part::Icon;
         param.m_pGraphics = pGraphics;
         param.m_matrix.Concat(*pMatrix);
         param.m_rtPart = rtDIB;
         param.m_bMaximize = true;
         param.m_pImage = pDib;
         pTheme->DrawBackground(&param);
       }
     }
     FX_BOOL bHasCheck = GetStylesEx() & FWL_STYLEEXT_LTB_Check;
     if (bHasCheck) {
       CFX_RectF rtCheck;
       rtCheck.Set(rtItem.left, rtItem.top, rtItem.height, rtItem.height);
       rtCheck.Deflate(2, 2, 2, 2);
-      pData->SetItemCheckRect(m_pInterface, pItem, rtCheck);
+      pData->SetItemCheckRect(this, pItem, rtCheck);
       CFWL_ThemeBackground param;
-      param.m_pWidget = m_pInterface;
+      param.m_pWidget = this;
       param.m_iPart = CFWL_Part::Check;
       param.m_pGraphics = pGraphics;
       if (GetItemChecked(pItem)) {
         param.m_dwStates = CFWL_PartState_Checked;
       } else {
         param.m_dwStates = CFWL_PartState_Normal;
       }
       param.m_matrix.Concat(*pMatrix);
       param.m_rtPart = rtCheck;
       param.m_bMaximize = true;
       pTheme->DrawBackground(&param);
     }
     CFX_WideString wsText;
-    pData->GetItemText(m_pInterface, pItem, wsText);
+    pData->GetItemText(this, pItem, wsText);
     if (wsText.GetLength() <= 0) {
       return;
     }
     CFX_RectF rtText(rtItem);
     rtText.Deflate(kItemTextMargin, kItemTextMargin);
     if (bHasIcon || bHasCheck) {
       rtText.Deflate(rtItem.height, 0, 0, 0);
     }
     CFWL_ThemeText textParam;
-    textParam.m_pWidget = m_pInterface;
+    textParam.m_pWidget = this;
     textParam.m_iPart = CFWL_Part::ListItem;
     textParam.m_dwStates = dwPartStates;
     textParam.m_pGraphics = pGraphics;
     textParam.m_matrix.Concat(*pMatrix);
     textParam.m_rtPart = rtText;
     textParam.m_wsText = wsText;
     textParam.m_dwTTOStyles = m_dwTTOStyles;
     textParam.m_iTTOAlign = m_iTTOAligns;
     textParam.m_bMaximize = true;
     pTheme->DrawText(&textParam);
   }
 }
-CFX_SizeF CFWL_ListBoxImp::CalcSize(FX_BOOL bAutoSize) {
+
+CFX_SizeF IFWL_ListBox::CalcSize(FX_BOOL bAutoSize) {
   CFX_SizeF fs;
   if (!m_pProperties->m_pThemeProvider)
     return fs;
 
   GetClientRect(m_rtClient);
   m_rtConent = m_rtClient;
   CFX_RectF rtUIMargin;
   rtUIMargin.Set(0, 0, 0, 0);
   if (!m_pOuter) {
     CFX_RectF* pUIMargin = static_cast<CFX_RectF*>(
         GetThemeCapacity(CFWL_WidgetCapacity::UIMargin));
     if (pUIMargin) {
       m_rtConent.Deflate(pUIMargin->left, pUIMargin->top, pUIMargin->width,
                          pUIMargin->height);
     }
   }
   FX_FLOAT fWidth = 0;
-  if (m_pProperties->m_pThemeProvider->IsCustomizedLayout(m_pInterface)) {
+  if (m_pProperties->m_pThemeProvider->IsCustomizedLayout(this)) {
     IFWL_ListBoxDP* pData =
         static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-    int32_t iCount = pData->CountItems(m_pInterface);
+    int32_t iCount = pData->CountItems(this);
     for (int32_t i = 0; i < iCount; i++) {
-      IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+      IFWL_ListItem* pItem = pData->GetItem(this, i);
       if (!bAutoSize) {
         CFX_RectF rtItem;
         rtItem.Set(m_rtClient.left, m_rtClient.top + fs.y, 0, 0);
         IFWL_ListBoxDP* pBox =
             static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-        pBox->SetItemRect(m_pInterface, pItem, rtItem);
+        pBox->SetItemRect(this, pItem, rtItem);
       }
       if (fs.x < 0) {
         fs.x = 0;
         fWidth = 0;
       }
     }
   } else {
     fWidth = GetMaxTextWidth();
     fWidth += 2 * kItemTextMargin;
     if (!bAutoSize) {
       FX_FLOAT fActualWidth =
           m_rtClient.width - rtUIMargin.left - rtUIMargin.width;
       if (fWidth < fActualWidth) {
         fWidth = fActualWidth;
       }
     }
     IFWL_ListBoxDP* pData =
         static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
     m_fItemHeight = GetItemHeigt();
     FX_BOOL bHasIcon;
     bHasIcon = GetStylesEx() & FWL_STYLEEXT_LTB_Icon;
     if (bHasIcon) {
       fWidth += m_fItemHeight;
     }
-    int32_t iCount = pData->CountItems(m_pInterface);
+    int32_t iCount = pData->CountItems(this);
     for (int32_t i = 0; i < iCount; i++) {
-      IFWL_ListItem* htem = pData->GetItem(m_pInterface, i);
+      IFWL_ListItem* htem = pData->GetItem(this, i);
       GetItemSize(fs, htem, fWidth, m_fItemHeight, bAutoSize);
     }
   }
   if (bAutoSize) {
     return fs;
   }
   FX_FLOAT iWidth = m_rtClient.width - rtUIMargin.left - rtUIMargin.width;
   FX_FLOAT iHeight = m_rtClient.height;
   FX_BOOL bShowVertScr =
       (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_ShowScrollBarAlaways) &&
@@ skipping 82 matching lines @@
     m_pHorzScrollBar->SetTrackPos(0);
     m_pHorzScrollBar->SetStates(FWL_WGTSTATE_Invisible, TRUE);
   }
   if (bShowVertScr && bShowHorzScr) {
     m_rtStatic.Set(m_rtClient.right() - m_fScorllBarWidth,
                    m_rtClient.bottom() - m_fScorllBarWidth, m_fScorllBarWidth,
                    m_fScorllBarWidth);
   }
   return fs;
 }
-void CFWL_ListBoxImp::GetItemSize(CFX_SizeF& size,
-                                  IFWL_ListItem* pItem,
-                                  FX_FLOAT fWidth,
-                                  FX_FLOAT fItemHeight,
-                                  FX_BOOL bAutoSize) {
+
+void IFWL_ListBox::GetItemSize(CFX_SizeF& size,
+                               IFWL_ListItem* pItem,
+                               FX_FLOAT fWidth,
+                               FX_FLOAT fItemHeight,
+                               FX_BOOL bAutoSize) {
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiColumn) {
   } else {
     if (!bAutoSize) {
       CFX_RectF rtItem;
       rtItem.Set(0, size.y, fWidth, fItemHeight);
       IFWL_ListBoxDP* pData =
           static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-      pData->SetItemRect(m_pInterface, pItem, rtItem);
+      pData->SetItemRect(this, pItem, rtItem);
     }
     size.x = fWidth;
     size.y += fItemHeight;
   }
 }
-FX_FLOAT CFWL_ListBoxImp::GetMaxTextWidth() {
+
+FX_FLOAT IFWL_ListBox::GetMaxTextWidth() {
   FX_FLOAT fRet = 0.0f;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
+  int32_t iCount = pData->CountItems(this);
   for (int32_t i = 0; i < iCount; i++) {
-    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    IFWL_ListItem* pItem = pData->GetItem(this, i);
     if (!pItem) {
       continue;
     }
     CFX_WideString wsText;
-    pData->GetItemText(m_pInterface, pItem, wsText);
+    pData->GetItemText(this, pItem, wsText);
     CFX_SizeF sz = CalcTextSize(wsText, m_pProperties->m_pThemeProvider);
     if (sz.x > fRet) {
       fRet = sz.x;
     }
   }
   return fRet;
 }
-FX_FLOAT CFWL_ListBoxImp::GetScrollWidth() {
+
+FX_FLOAT IFWL_ListBox::GetScrollWidth() {
   FX_FLOAT* pfWidth = static_cast<FX_FLOAT*>(
       GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
   if (!pfWidth)
     return 0;
   return *pfWidth;
 }
-FX_FLOAT CFWL_ListBoxImp::GetItemHeigt() {
+
+FX_FLOAT IFWL_ListBox::GetItemHeigt() {
   FX_FLOAT* pfFont =
       static_cast<FX_FLOAT*>(GetThemeCapacity(CFWL_WidgetCapacity::FontSize));
   if (!pfFont)
     return 20;
   return *pfFont + 2 * kItemTextMargin;
 }
-void CFWL_ListBoxImp::InitScrollBar(FX_BOOL bVert) {
+
+void IFWL_ListBox::InitScrollBar(FX_BOOL bVert) {
   if ((bVert && m_pVertScrollBar) || (!bVert && m_pHorzScrollBar)) {
     return;
   }
   CFWL_WidgetImpProperties prop;
   prop.m_dwStyleExes = bVert ? FWL_STYLEEXT_SCB_Vert : FWL_STYLEEXT_SCB_Horz;
   prop.m_dwStates = FWL_WGTSTATE_Invisible;
-  prop.m_pParent = m_pInterface;
+  prop.m_pParent = this;
   prop.m_pThemeProvider = m_pScrollBarTP;
-  IFWL_ScrollBar* pScrollBar = IFWL_ScrollBar::Create(prop, m_pInterface);
+  IFWL_ScrollBar* pScrollBar = IFWL_ScrollBar::Create(prop, this);
   pScrollBar->Initialize();
   (bVert ? &m_pVertScrollBar : &m_pHorzScrollBar)->reset(pScrollBar);
 }
 
-FX_BOOL CFWL_ListBoxImp::IsShowScrollBar(FX_BOOL bVert) {
+FX_BOOL IFWL_ListBox::IsShowScrollBar(FX_BOOL bVert) {
   IFWL_ScrollBar* pScrollbar =
       bVert ? m_pVertScrollBar.get() : m_pHorzScrollBar.get();
   if (!pScrollbar || (pScrollbar->GetStates() & FWL_WGTSTATE_Invisible)) {
     return FALSE;
   }
   return !(m_pProperties->m_dwStyleExes &
            FWL_STYLEEXT_LTB_ShowScrollBarFocus) ||
          (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused);
 }
-void CFWL_ListBoxImp::ProcessSelChanged() {
+
+void IFWL_ListBox::ProcessSelChanged() {
   CFWL_EvtLtbSelChanged selEvent;
-  selEvent.m_pSrcTarget = m_pInterface;
+  selEvent.m_pSrcTarget = this;
   CFX_Int32Array arrSels;
   int32_t iCount = CountSelItems();
   for (int32_t i = 0; i < iCount; i++) {
     IFWL_ListItem* item = GetSelItem(i);
     if (!item) {
       continue;
     }
     selEvent.iarraySels.Add(i);
   }
   DispatchEvent(&selEvent);
 }
 
-CFWL_ListBoxImpDelegate::CFWL_ListBoxImpDelegate(CFWL_ListBoxImp* pOwner)
+CFWL_ListBoxImpDelegate::CFWL_ListBoxImpDelegate(IFWL_ListBox* pOwner)
     : m_pOwner(pOwner) {}
 
 void CFWL_ListBoxImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
   if (!pMessage)
     return;
   if (!m_pOwner->IsEnabled())
     return;
 
   CFWL_MessageType dwMsgCode = pMessage->GetClassID();
   switch (dwMsgCode) {
@@ skipping 24 matching lines @@
     case CFWL_MessageType::MouseWheel: {
       OnMouseWheel(static_cast<CFWL_MsgMouseWheel*>(pMessage));
       break;
     }
     case CFWL_MessageType::Key: {
       CFWL_MsgKey* pMsg = static_cast<CFWL_MsgKey*>(pMessage);
       if (pMsg->m_dwCmd == FWL_KeyCommand::KeyDown)
         OnKeyDown(pMsg);
       break;
     }
-    default: {
-      break;
-    }
+    default: { break; }
   }
   CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
 }
 
 void CFWL_ListBoxImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {
   if (!pEvent)
     return;
   if (pEvent->GetClassID() != CFWL_EventType::Scroll)
     return;
 
@@ skipping 22 matching lines @@
       m_pOwner->m_pHorzScrollBar->SetStates(FWL_WGTSTATE_Invisible, !bSet);
     }
   }
   if (bSet) {
     m_pOwner->m_pProperties->m_dwStates |= (FWL_WGTSTATE_Focused);
   } else {
     m_pOwner->m_pProperties->m_dwStates &= ~(FWL_WGTSTATE_Focused);
   }
   m_pOwner->Repaint(&m_pOwner->m_rtClient);
 }
+
 void CFWL_ListBoxImpDelegate::OnLButtonDown(CFWL_MsgMouse* pMsg) {
   m_pOwner->m_bLButtonDown = TRUE;
   if ((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0) {
     m_pOwner->SetFocus(TRUE);
   }
   IFWL_ListItem* pItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
   if (!pItem) {
     return;
   }
   if (m_pOwner->m_pProperties->m_dwStyleExes &
@@ skipping 29 matching lines @@
       }
       m_pOwner->Update();
     }
   }
   m_pOwner->SetFocusItem(pItem);
   m_pOwner->ScrollToVisible(pItem);
   m_pOwner->SetGrab(TRUE);
   m_pOwner->ProcessSelChanged();
   m_pOwner->Repaint(&m_pOwner->m_rtClient);
 }
+
 void CFWL_ListBoxImpDelegate::OnLButtonUp(CFWL_MsgMouse* pMsg) {
   if (m_pOwner->m_bLButtonDown) {
     m_pOwner->m_bLButtonDown = FALSE;
     m_pOwner->SetGrab(FALSE);
     DispatchSelChangedEv();
   }
 }
+
 void CFWL_ListBoxImpDelegate::OnMouseWheel(CFWL_MsgMouseWheel* pMsg) {
   if (!m_pOwner->IsShowScrollBar(TRUE)) {
     return;
   }
   IFWL_WidgetDelegate* pDelegate =
       m_pOwner->m_pVertScrollBar->SetDelegate(nullptr);
   pDelegate->OnProcessMessage(pMsg);
 }
+
 void CFWL_ListBoxImpDelegate::OnKeyDown(CFWL_MsgKey* pMsg) {
   uint32_t dwKeyCode = pMsg->m_dwKeyCode;
   switch (dwKeyCode) {
     case FWL_VKEY_Tab:
     case FWL_VKEY_Up:
     case FWL_VKEY_Down:
     case FWL_VKEY_Home:
     case FWL_VKEY_End: {
       IFWL_ListItem* pItem = m_pOwner->GetFocusedItem();
       pItem = m_pOwner->GetItem(pItem, dwKeyCode);
       FX_BOOL bShift = pMsg->m_dwFlags & FWL_KEYFLAG_Shift;
       FX_BOOL bCtrl = pMsg->m_dwFlags & FWL_KEYFLAG_Ctrl;
       OnVK(pItem, bShift, bCtrl);
       DispatchSelChangedEv();
       m_pOwner->ProcessSelChanged();
       break;
     }
-    default: {}
+    default:
+      break;
   }
 }
+
 void CFWL_ListBoxImpDelegate::OnVK(IFWL_ListItem* pItem,
                                    FX_BOOL bShift,
                                    FX_BOOL bCtrl) {
   if (!pItem) {
     return;
   }
   if (m_pOwner->m_pProperties->m_dwStyleExes &
       FWL_STYLEEXT_LTB_MultiSelection) {
     if (bCtrl) {
     } else if (bShift) {
@@ skipping 11 matching lines @@
   }
   m_pOwner->SetFocusItem(pItem);
   m_pOwner->ScrollToVisible(pItem);
   {
     CFX_RectF rtInvalidate;
     rtInvalidate.Set(0, 0, m_pOwner->m_pProperties->m_rtWidget.width,
                      m_pOwner->m_pProperties->m_rtWidget.height);
     m_pOwner->Repaint(&rtInvalidate);
   }
 }
+
 FX_BOOL CFWL_ListBoxImpDelegate::OnScroll(IFWL_ScrollBar* pScrollBar,
                                           uint32_t dwCode,
                                           FX_FLOAT fPos) {
   CFX_SizeF fs;
   pScrollBar->GetRange(fs.x, fs.y);
   FX_FLOAT iCurPos = pScrollBar->GetPos();
   FX_FLOAT fStep = pScrollBar->GetStepSize();
   switch (dwCode) {
     case FWL_SCBCODE_Min: {
       fPos = fs.x;
@@ skipping 37 matching lines @@
     case FWL_SCBCODE_EndScroll:
       return FALSE;
   }
   if (iCurPos != fPos) {
     pScrollBar->SetPos(fPos);
     pScrollBar->SetTrackPos(fPos);
     m_pOwner->Repaint(&m_pOwner->m_rtClient);
   }
   return TRUE;
 }
+
 void CFWL_ListBoxImpDelegate::DispatchSelChangedEv() {
   CFWL_EvtLtbSelChanged ev;
-  ev.m_pSrcTarget = m_pOwner->m_pInterface;
+  ev.m_pSrcTarget = m_pOwner;
   m_pOwner->DispatchEvent(&ev);
 }