XFA: Fix DOS newlines

xfa/src/fwl/src/basewidget/fwl_comboboximp.cpp

Index: xfa/src/fwl/src/basewidget/fwl_comboboximp.cpp
diff --git a/xfa/src/fwl/src/basewidget/fwl_comboboximp.cpp b/xfa/src/fwl/src/basewidget/fwl_comboboximp.cpp
index e3e823aac56310ea351848a4e0e2d3e5e73fe9f5..2237953907b562a70a682cdcc18783b731027c50 100644
--- a/xfa/src/fwl/src/basewidget/fwl_comboboximp.cpp
+++ b/xfa/src/fwl/src/basewidget/fwl_comboboximp.cpp
@@ -1,1866 +1,1866 @@
-// 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/src/foxitlib.h"
-#include "xfa/src/fwl/src/core/include/fwl_threadimp.h"
-#include "xfa/src/fwl/src/core/include/fwl_appimp.h"
-#include "xfa/src/fwl/src/core/include/fwl_targetimp.h"
-#include "xfa/src/fwl/src/core/include/fwl_noteimp.h"
-#include "xfa/src/fwl/src/core/include/fwl_widgetimp.h"
-#include "xfa/src/fwl/src/core/include/fwl_panelimp.h"
-#include "xfa/src/fwl/src/core/include/fwl_formimp.h"
-#include "xfa/src/fwl/src/core/include/fwl_widgetmgrimp.h"
-#include "xfa/src/fwl/src/basewidget/include/fwl_scrollbarimp.h"
-#include "xfa/src/fwl/src/basewidget/include/fwl_editimp.h"
-#include "xfa/src/fwl/src/basewidget/include/fwl_listboximp.h"
-#include "xfa/src/fwl/src/basewidget/include/fwl_formproxyimp.h"
-#include "xfa/src/fwl/src/basewidget/include/fwl_comboboximp.h"
-
-// static
-IFWL_ComboBox* IFWL_ComboBox::Create(
-    const CFWL_WidgetImpProperties& properties) {
-  IFWL_ComboBox* pComboBox = new IFWL_ComboBox;
-  CFWL_ComboBoxImp* pComboBoxImpl = new CFWL_ComboBoxImp(properties, nullptr);
-  pComboBox->SetImpl(pComboBoxImpl);
-  pComboBoxImpl->SetInterface(pComboBox);
-  return pComboBox;
-}
-IFWL_ComboBox::IFWL_ComboBox() {}
-int32_t IFWL_ComboBox::GetCurSel() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetCurSel();
-}
-FWL_ERR IFWL_ComboBox::SetCurSel(int32_t iSel) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->SetCurSel(iSel);
-}
-FWL_ERR IFWL_ComboBox::SetEditText(const CFX_WideString& wsText) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->SetEditText(wsText);
-}
-int32_t IFWL_ComboBox::GetEditTextLength() const {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetEditTextLength();
-}
-FWL_ERR IFWL_ComboBox::GetEditText(CFX_WideString& wsText,
-                                   int32_t nStart,
-                                   int32_t nCount) const {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())
-      ->GetEditText(wsText, nStart, nCount);
-}
-FWL_ERR IFWL_ComboBox::SetEditSelRange(int32_t nStart, int32_t nCount) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())
-      ->SetEditSelRange(nStart, nCount);
-}
-int32_t IFWL_ComboBox::GetEditSelRange(int32_t nIndex, int32_t& nStart) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())
-      ->GetEditSelRange(nIndex, nStart);
-}
-int32_t IFWL_ComboBox::GetEditLimit() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetEditLimit();
-}
-FWL_ERR IFWL_ComboBox::SetEditLimit(int32_t nLimit) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->SetEditLimit(nLimit);
-}
-FWL_ERR IFWL_ComboBox::EditDoClipboard(int32_t iCmd) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditDoClipboard(iCmd);
-}
-FX_BOOL IFWL_ComboBox::EditRedo(const CFX_ByteStringC& bsRecord) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditRedo(bsRecord);
-}
-FX_BOOL IFWL_ComboBox::EditUndo(const CFX_ByteStringC& bsRecord) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditUndo(bsRecord);
-}
-IFWL_ListBox* IFWL_ComboBox::GetListBoxt() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetListBoxt();
-}
-FX_BOOL IFWL_ComboBox::AfterFocusShowDropList() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->AfterFocusShowDropList();
-}
-FX_ERR IFWL_ComboBox::OpenDropDownList(FX_BOOL bActivate) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->OpenDropDownList(bActivate);
-}
-FX_BOOL IFWL_ComboBox::EditCanUndo() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanUndo();
-}
-FX_BOOL IFWL_ComboBox::EditCanRedo() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanRedo();
-}
-FX_BOOL IFWL_ComboBox::EditUndo() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditUndo();
-}
-FX_BOOL IFWL_ComboBox::EditRedo() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditRedo();
-}
-FX_BOOL IFWL_ComboBox::EditCanCopy() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanCopy();
-}
-FX_BOOL IFWL_ComboBox::EditCanCut() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanCut();
-}
-FX_BOOL IFWL_ComboBox::EditCanSelectAll() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanSelectAll();
-}
-FX_BOOL IFWL_ComboBox::EditCopy(CFX_WideString& wsCopy) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCopy(wsCopy);
-}
-FX_BOOL IFWL_ComboBox::EditCut(CFX_WideString& wsCut) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCut(wsCut);
-}
-FX_BOOL IFWL_ComboBox::EditPaste(const CFX_WideString& wsPaste) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditPaste(wsPaste);
-}
-FX_BOOL IFWL_ComboBox::EditSelectAll() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditSelectAll();
-}
-FX_BOOL IFWL_ComboBox::EditDelete() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditDelete();
-}
-FX_BOOL IFWL_ComboBox::EditDeSelect() {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditDeSelect();
-}
-FWL_ERR IFWL_ComboBox::GetBBox(CFX_RectF& rect) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetBBox(rect);
-}
-FWL_ERR IFWL_ComboBox::EditModifyStylesEx(FX_DWORD dwStylesExAdded,
-                                          FX_DWORD dwStylesExRemoved) {
-  return static_cast<CFWL_ComboBoxImp*>(GetImpl())
-      ->EditModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-}
-
-CFWL_ComboEditImp::CFWL_ComboEditImp(const CFWL_WidgetImpProperties& properties,
-                                     IFWL_Widget* pOuter)
-    : CFWL_EditImp(properties, pOuter) {
-  m_pOuter = static_cast<CFWL_ComboBoxImp*>(pOuter->GetImpl());
-}
-
-CFWL_ComboEditImpDelegate::CFWL_ComboEditImpDelegate(CFWL_ComboEditImp* pOwner)
-    : CFWL_EditImpDelegate(pOwner), m_pOwner(pOwner) {
-}
-int32_t CFWL_ComboEditImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
-  if (!pMessage)
-    return 0;
-  FX_DWORD dwMsgCode = pMessage->GetClassID();
-  FX_BOOL backDefault = TRUE;
-  switch (dwMsgCode) {
-    case FWL_MSGHASH_SetFocus:
-    case FWL_MSGHASH_KillFocus: {
-      if (dwMsgCode == FWL_MSGHASH_SetFocus) {
-        m_pOwner->m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
-      } else {
-        m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
-      }
-      backDefault = FALSE;
-      break;
-    }
-    case FWL_MSGHASH_Mouse: {
-      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
-      if ((pMsg->m_dwCmd == FWL_MSGMOUSECMD_LButtonDown) &&
-          ((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)) {
-        m_pOwner->SetSelected();
-        m_pOwner->SetComboBoxFocus(TRUE);
-      }
-      break;
-    }
-    default: {}
-  }
-  if (!backDefault) {
-    return 1;
-  }
-  return CFWL_EditImpDelegate::OnProcessMessage(pMessage);
-}
-void CFWL_ComboEditImp::ClearSelected() {
-  ClearSelections();
-  Repaint(&m_rtClient);
-}
-void CFWL_ComboEditImp::SetSelected() {
-  FlagFocus(TRUE);
-  EndCaret();
-  AddSelRange(0);
-}
-void CFWL_ComboEditImp::EndCaret() {
-  m_pEdtEngine->MoveCaretPos(MC_End);
-}
-void CFWL_ComboEditImp::FlagFocus(FX_BOOL bSet) {
-  if (bSet) {
-    m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
-  } else {
-    m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
-    ShowCaret(FALSE);
-  }
-};
-void CFWL_ComboEditImp::SetComboBoxFocus(FX_BOOL bSet) {
-  m_pOuter->SetFocus(bSet);
-}
-CFWL_ComboListImp::CFWL_ComboListImp(const CFWL_WidgetImpProperties& properties,
-                                     IFWL_Widget* pOuter)
-    : CFWL_ListBoxImp(properties, pOuter), m_bNotifyOwner(TRUE) {
-  FXSYS_assert(pOuter != NULL);
-}
-FWL_ERR CFWL_ComboListImp::Initialize() {
-  if (CFWL_ListBoxImp::Initialize() != FWL_ERR_Succeeded)
-    return FWL_ERR_Indefinite;
-  delete m_pDelegate;
-  m_pDelegate = new CFWL_ComboListImpDelegate(this);
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboListImp::Finalize() {
-  delete m_pDelegate;
-  m_pDelegate = nullptr;
-  return CFWL_ListBoxImp::Finalize();
-}
-int32_t CFWL_ComboListImp::MatchItem(const CFX_WideString& wsMatch) {
-  if (wsMatch.IsEmpty()) {
-    return -1;
-  }
-  if (!m_pProperties->m_pDataProvider)
-    return -1;
-  IFWL_ListBoxDP* pData =
-      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  int32_t iCount = pData->CountItems(m_pInterface);
-  for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    CFX_WideString wsText;
-    pData->GetItemText(m_pInterface, hItem, wsText);
-    FX_STRSIZE pos = wsText.Find(wsMatch.c_str());
-    if (!pos) {
-      return i;
-    }
-  }
-  return -1;
-}
-void CFWL_ComboListImp::ChangeSelected(int32_t iSel) {
-  if (!m_pProperties->m_pDataProvider)
-    return;
-  IFWL_ListBoxDP* pData =
-      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iSel);
-  CFX_RectF rtInvalidate;
-  rtInvalidate.Reset();
-  FWL_HLISTITEM hOld = GetSelItem(0);
-  int32_t iOld = pData->GetItemIndex(m_pInterface, hOld);
-  if (iOld == iSel) {
-    return;
-  } else if (iOld > -1) {
-    GetItemRect(iOld, rtInvalidate);
-    SetSelItem(hOld, FALSE);
-  }
-  if (hItem) {
-    CFX_RectF rect;
-    GetItemRect(iSel, rect);
-    rtInvalidate.Union(rect);
-    FWL_HLISTITEM hSel = pData->GetItem(m_pInterface, iSel);
-    SetSelItem(hSel, TRUE);
-  }
-  if (!rtInvalidate.IsEmpty()) {
-    Repaint(&rtInvalidate);
-  }
-}
-int32_t CFWL_ComboListImp::CountItems() {
-  IFWL_ListBoxDP* pData =
-      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  return pData ? pData->CountItems(m_pInterface) : 0;
-}
-void CFWL_ComboListImp::GetItemRect(int32_t nIndex, CFX_RectF& rtItem) {
-  IFWL_ListBoxDP* pData =
-      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, nIndex);
-  pData->GetItemRect(m_pInterface, hItem, rtItem);
-}
-void CFWL_ComboListImp::ClientToOuter(FX_FLOAT& fx, FX_FLOAT& fy) {
-  fx += m_pProperties->m_rtWidget.left, fy += m_pProperties->m_rtWidget.top;
-  IFWL_Widget* pOwner = GetOwner();
-  if (!pOwner)
-    return;
-  pOwner->TransformTo(m_pOuter, fx, fy);
-}
-void CFWL_ComboListImp::SetFocus(FX_BOOL bSet) {
-  CFWL_WidgetImp::SetFocus(bSet);
-}
-CFWL_ComboListImpDelegate::CFWL_ComboListImpDelegate(CFWL_ComboListImp* pOwner)
-    : CFWL_ListBoxImpDelegate(pOwner), m_pOwner(pOwner) {
-}
-int32_t CFWL_ComboListImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
-  if (!pMessage)
-    return 0;
-  FX_DWORD dwHashCode = pMessage->GetClassID();
-  FX_BOOL backDefault = TRUE;
-  if (dwHashCode == FWL_MSGHASH_SetFocus ||
-      dwHashCode == FWL_MSGHASH_KillFocus) {
-    OnDropListFocusChanged(pMessage, dwHashCode == FWL_MSGHASH_SetFocus);
-  } else if (dwHashCode == FWL_MSGHASH_Mouse) {
-    CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
-    if (m_pOwner->IsShowScrollBar(TRUE) && m_pOwner->m_pVertScrollBar) {
-      CFX_RectF rect;
-      m_pOwner->m_pVertScrollBar->GetWidgetRect(rect);
-      if (rect.Contains(pMsg->m_fx, pMsg->m_fy)) {
-        pMsg->m_fx -= rect.left;
-        pMsg->m_fy -= rect.top;
-        IFWL_WidgetDelegate* pDelegate =
-            m_pOwner->m_pVertScrollBar->SetDelegate(NULL);
-        return pDelegate->OnProcessMessage(pMsg);
-      }
-    }
-    FX_DWORD dwCmd = pMsg->m_dwCmd;
-    switch (dwCmd) {
-      case FWL_MSGMOUSECMD_MouseMove: {
-        backDefault = FALSE;
-        OnDropListMouseMove(pMsg);
-        break;
-      }
-      case FWL_MSGMOUSECMD_LButtonDown: {
-        backDefault = FALSE;
-        OnDropListLButtonDown(pMsg);
-        break;
-      }
-      case FWL_MSGMOUSECMD_LButtonUp: {
-        backDefault = FALSE;
-        OnDropListLButtonUp(pMsg);
-        break;
-      }
-      default: {}
-    }
-  } else if (dwHashCode == FWL_MSGHASH_Key) {
-    backDefault = !OnDropListKey(static_cast<CFWL_MsgKey*>(pMessage));
-  }
-  if (!backDefault) {
-    return 1;
-  }
-  return CFWL_ListBoxImpDelegate::OnProcessMessage(pMessage);
-}
-void CFWL_ComboListImpDelegate::OnDropListFocusChanged(CFWL_Message* pMsg,
-                                                       FX_BOOL bSet) {
-  if (!bSet) {
-    CFWL_MsgKillFocus* pKill = static_cast<CFWL_MsgKillFocus*>(pMsg);
-    CFWL_ComboBoxImp* pOuter =
-        static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
-    if (pKill->m_pSetFocus == m_pOwner->m_pOuter ||
-        pKill->m_pSetFocus == pOuter->m_pEdit.get()) {
-      pOuter->ShowDropList(FALSE);
-    }
-  }
-}
-int32_t CFWL_ComboListImpDelegate::OnDropListMouseMove(CFWL_MsgMouse* pMsg) {
-  if (m_pOwner->m_rtClient.Contains(pMsg->m_fx, pMsg->m_fy)) {
-    if (m_pOwner->m_bNotifyOwner) {
-      m_pOwner->m_bNotifyOwner = FALSE;
-    }
-    if (m_pOwner->IsShowScrollBar(TRUE) && m_pOwner->m_pVertScrollBar) {
-      CFX_RectF rect;
-      m_pOwner->m_pVertScrollBar->GetWidgetRect(rect);
-      if (rect.Contains(pMsg->m_fx, pMsg->m_fy)) {
-        return 1;
-      }
-    }
-    FWL_HLISTITEM hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
-    if (hItem) {
-      if (!m_pOwner->m_pProperties->m_pDataProvider)
-        return 0;
-      IFWL_ListBoxDP* pData = static_cast<IFWL_ListBoxDP*>(
-          m_pOwner->m_pProperties->m_pDataProvider);
-      int32_t iSel = pData->GetItemIndex(m_pOwner->m_pInterface, hItem);
-      CFWL_EvtCmbHoverChanged event;
-      event.m_pSrcTarget = m_pOwner->m_pOuter;
-      event.m_iCurHover = iSel;
-      m_pOwner->DispatchEvent(&event);
-      m_pOwner->ChangeSelected(iSel);
-    }
-  } else if (m_pOwner->m_bNotifyOwner) {
-    m_pOwner->ClientToOuter(pMsg->m_fx, pMsg->m_fy);
-    CFWL_ComboBoxImp* pOuter =
-        static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
-    pOuter->m_pDelegate->OnProcessMessage(pMsg);
-  }
-  return 1;
-}
-int32_t CFWL_ComboListImpDelegate::OnDropListLButtonDown(CFWL_MsgMouse* pMsg) {
-  if (m_pOwner->m_rtClient.Contains(pMsg->m_fx, pMsg->m_fy)) {
-    return 0;
-  }
-  CFWL_ComboBoxImp* pOuter =
-      static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
-  pOuter->ShowDropList(FALSE);
-  return 1;
-}
-int32_t CFWL_ComboListImpDelegate::OnDropListLButtonUp(CFWL_MsgMouse* pMsg) {
-  CFWL_ComboBoxImp* pOuter =
-      static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
-  if (m_pOwner->m_bNotifyOwner) {
-    m_pOwner->ClientToOuter(pMsg->m_fx, pMsg->m_fy);
-    pOuter->m_pDelegate->OnProcessMessage(pMsg);
-  } else {
-    if (m_pOwner->IsShowScrollBar(TRUE) && m_pOwner->m_pVertScrollBar) {
-      CFX_RectF rect;
-      m_pOwner->m_pVertScrollBar->GetWidgetRect(rect);
-      if (rect.Contains(pMsg->m_fx, pMsg->m_fy)) {
-        return 1;
-      }
-    }
-    pOuter->ShowDropList(FALSE);
-    FWL_HLISTITEM hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
-    if (hItem) {
-      pOuter->ProcessSelChanged(TRUE);
-    }
-  }
-  return 1;
-}
-int32_t CFWL_ComboListImpDelegate::OnDropListKey(CFWL_MsgKey* pKey) {
-  CFWL_ComboBoxImp* pOuter =
-      static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
-  FX_BOOL bPropagate = FALSE;
-  if (pKey->m_dwCmd == FWL_MSGKEYCMD_KeyDown) {
-    FX_DWORD dwKeyCode = pKey->m_dwKeyCode;
-    switch (dwKeyCode) {
-      case FWL_VKEY_Return:
-      case FWL_VKEY_Escape: {
-        pOuter->ShowDropList(FALSE);
-        return 1;
-      }
-      case FWL_VKEY_Up:
-      case FWL_VKEY_Down: {
-        OnDropListKeyDown(pKey);
-        pOuter->SetDelegate(nullptr);
-        pOuter->ProcessSelChanged(FALSE);
-        return 1;
-      }
-      default: { bPropagate = TRUE; }
-    }
-  } else if (pKey->m_dwCmd == FWL_MSGKEYCMD_Char) {
-    bPropagate = TRUE;
-  }
-  if (bPropagate) {
-    pKey->m_pDstTarget = m_pOwner->m_pOuter;
-    pOuter->m_pDelegate->OnProcessMessage(pKey);
-    return 1;
-  }
-  return 0;
-}
-void CFWL_ComboListImpDelegate::OnDropListKeyDown(CFWL_MsgKey* pKey) {
-  FX_DWORD dwKeyCode = pKey->m_dwKeyCode;
-  switch (dwKeyCode) {
-    case FWL_VKEY_Up:
-    case FWL_VKEY_Down:
-    case FWL_VKEY_Home:
-    case FWL_VKEY_End: {
-      CFWL_ComboBoxImp* pOuter =
-          static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
-      IFWL_ListBoxDP* pData = static_cast<IFWL_ListBoxDP*>(
-          m_pOwner->m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem =
-          pData->GetItem(m_pOwner->m_pInterface, pOuter->m_iCurSel);
-      hItem = m_pOwner->GetItem(hItem, dwKeyCode);
-      if (!hItem) {
-        break;
-      }
-      m_pOwner->SetSelection(hItem, hItem, TRUE);
-      m_pOwner->ScrollToVisible(hItem);
-      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);
-      break;
-    }
-    default: {}
-  }
-}
-CFWL_ComboBoxImp::CFWL_ComboBoxImp(const CFWL_WidgetImpProperties& properties,
-                                   IFWL_Widget* pOuter)
-    : CFWL_WidgetImp(properties, pOuter),
-      m_pForm(NULL),
-      m_bLButtonDown(FALSE),
-      m_iCurSel(-1),
-      m_iBtnState(FWL_PARTSTATE_CMB_Normal),
-      m_fComboFormHandler(0),
-      m_bNeedShowList(FALSE) {
-  m_rtClient.Reset();
-  m_rtBtn.Reset();
-  m_rtHandler.Reset();
-}
-CFWL_ComboBoxImp::~CFWL_ComboBoxImp() {
-}
-FWL_ERR CFWL_ComboBoxImp::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_ComboBox;
-  return FWL_ERR_Succeeded;
-}
-FX_DWORD CFWL_ComboBoxImp::GetClassID() const {
-  return FWL_CLASSHASH_ComboBox;
-}
-FWL_ERR CFWL_ComboBoxImp::Initialize() {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_Initialize();
-  }
-  if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
-    return FWL_WGTSTATE_Invisible;  // Probably a bug; not a FWL_ERR_ value.
-  m_pDelegate = new CFWL_ComboBoxImpDelegate(this);
-  CFWL_WidgetImpProperties prop;
-  prop.m_pThemeProvider = m_pProperties->m_pThemeProvider;
-  prop.m_dwStyles |= FWL_WGTSTYLE_Border | FWL_WGTSTYLE_VScroll;
-  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListItemIconText) {
-    prop.m_dwStyleExes |= FWL_STYLEEXT_LTB_Icon;
-  }
-  prop.m_pDataProvider = m_pProperties->m_pDataProvider;
-  m_pListBox.reset(IFWL_ListBox::CreateComboList(prop, m_pInterface));
-  m_pListBox->Initialize();
-  if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_DropDown) && !m_pEdit) {
-    CFWL_WidgetImpProperties prop2;
-    m_pEdit.reset(IFWL_Edit::CreateComboEdit(prop2, m_pInterface));
-    m_pEdit->Initialize();
-    static_cast<CFWL_EditImp*>(m_pEdit->GetImpl())->SetOuter(m_pInterface);
-  }
-  if (m_pEdit) {
-    m_pEdit->SetParent(m_pInterface);
-  }
-  SetStates(m_pProperties->m_dwStates);
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboBoxImp::Finalize() {
-  if (m_pEdit) {
-    m_pEdit->Finalize();
-  }
-  m_pListBox->Finalize();
-  delete m_pDelegate;
-  m_pDelegate = nullptr;
-  return CFWL_WidgetImp::Finalize();
-}
-FWL_ERR CFWL_ComboBoxImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
-  if (bAutoSize) {
-    rect.Reset();
-    FX_BOOL bIsDropDown = IsDropDownStyle();
-    if (bIsDropDown && m_pEdit) {
-      m_pEdit->GetWidgetRect(rect, TRUE);
-    } else {
-      rect.width = 100;
-      rect.height = 16;
-    }
-    if (!m_pProperties->m_pThemeProvider) {
-      ReSetTheme();
-    }
-    FX_FLOAT* pFWidth = static_cast<FX_FLOAT*>(
-        GetThemeCapacity(FWL_WGTCAPACITY_ScrollBarWidth));
-    if (!pFWidth)
-      return FWL_ERR_Indefinite;
-    rect.Inflate(0, 0, *pFWidth, 0);
-    CFWL_WidgetImp::GetWidgetRect(rect, TRUE);
-  } else {
-    rect = m_pProperties->m_rtWidget;
-  }
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboBoxImp::ModifyStylesEx(FX_DWORD dwStylesExAdded,
-                                         FX_DWORD dwStylesExRemoved) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-  }
-  FX_BOOL bAddDropDown = dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown;
-  FX_BOOL bRemoveDropDown = dwStylesExRemoved & FWL_STYLEEXT_CMB_DropDown;
-  if (bAddDropDown && !m_pEdit) {
-    CFWL_WidgetImpProperties prop;
-    m_pEdit.reset(IFWL_Edit::CreateComboEdit(prop, nullptr));
-    m_pEdit->Initialize();
-    static_cast<CFWL_EditImp*>(m_pEdit->GetImpl())->SetOuter(m_pInterface);
-    m_pEdit->SetParent(m_pInterface);
-  } else if (bRemoveDropDown && m_pEdit) {
-    m_pEdit->SetStates(FWL_WGTSTATE_Invisible, TRUE);
-  }
-  return CFWL_WidgetImp::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-}
-FWL_ERR CFWL_ComboBoxImp::Update() {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_Update();
-  }
-  if (IsLocked()) {
-    return FWL_ERR_Indefinite;
-  }
-  ReSetTheme();
-  FX_BOOL bDropDown = IsDropDownStyle();
-  if (bDropDown && m_pEdit) {
-    ReSetEditAlignment();
-  }
-  if (m_pProperties->m_pThemeProvider == NULL) {
-    m_pProperties->m_pThemeProvider = GetAvailableTheme();
-  }
-  Layout();
-  CFWL_ThemePart part;
-  part.m_pWidget = m_pInterface;
-  m_fComboFormHandler =
-      *static_cast<FX_FLOAT*>(m_pProperties->m_pThemeProvider->GetCapacity(
-          &part, FWL_WGTCAPACITY_CMB_ComboFormHandler));
-  return FWL_ERR_Succeeded;
-}
-FX_DWORD CFWL_ComboBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_HitTest(fx, fy);
-  }
-  return CFWL_WidgetImp::HitTest(fx, fy);
-}
-FWL_ERR CFWL_ComboBoxImp::DrawWidget(CFX_Graphics* pGraphics,
-                                     const CFX_Matrix* pMatrix) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_DrawWidget(pGraphics, pMatrix);
-  }
-  if (!pGraphics)
-    return FWL_ERR_Indefinite;
-  if (!m_pProperties->m_pThemeProvider)
-    return FWL_ERR_Indefinite;
-  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
-  FX_BOOL bIsDropDown = IsDropDownStyle();
-  if (HasBorder()) {
-    DrawBorder(pGraphics, FWL_PART_CMB_Border, pTheme, pMatrix);
-  }
-  if (HasEdge()) {
-    DrawEdge(pGraphics, FWL_PART_CMB_Edge, pTheme, pMatrix);
-  }
-  if (!bIsDropDown) {
-    CFX_RectF rtTextBk(m_rtClient);
-    rtTextBk.width -= m_rtBtn.width;
-    CFWL_ThemeBackground param;
-    param.m_pWidget = m_pInterface;
-    param.m_iPart = FWL_PART_CMB_Background;
-    param.m_pGraphics = pGraphics;
-    if (pMatrix) {
-      param.m_matrix.Concat(*pMatrix);
-    }
-    param.m_rtPart = rtTextBk;
-    if (m_iCurSel >= 0) {
-      IFWL_ListBoxDP* pData = static_cast<IFWL_ListBoxDP*>(
-          static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
-              ->m_pProperties->m_pDataProvider);
-      void* p = pData->GetItemData(m_pListBox.get(),
-                                   pData->GetItem(m_pListBox.get(), m_iCurSel));
-      if (p != NULL) {
-        param.m_pData = p;
-      }
-    }
-    if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
-      param.m_dwStates = FWL_PARTSTATE_CMB_Disabled;
-    } else if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) &&
-               (m_iCurSel >= 0)) {
-      param.m_dwStates = FWL_PARTSTATE_CMB_Selected;
-    } else {
-      param.m_dwStates = FWL_PARTSTATE_CMB_Normal;
-    }
-    pTheme->DrawBackground(&param);
-    if (m_iCurSel >= 0) {
-      if (!m_pListBox)
-        return FWL_ERR_Indefinite;
-      CFX_WideString wsText;
-      IFWL_ComboBoxDP* pData =
-          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
-      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
-          ->GetItemText(hItem, wsText);
-      CFWL_ThemeText param;
-      param.m_pWidget = m_pInterface;
-      param.m_iPart = FWL_PART_CMB_Caption;
-      param.m_dwStates = m_iBtnState;
-      param.m_pGraphics = pGraphics;
-      param.m_matrix.Concat(*pMatrix);
-      param.m_rtPart = rtTextBk;
-      param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)
-                             ? FWL_PARTSTATE_CMB_Selected
-                             : FWL_PARTSTATE_CMB_Normal;
-      param.m_wsText = wsText;
-      param.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
-      param.m_iTTOAlign = FDE_TTOALIGNMENT_CenterLeft;
-      pTheme->DrawText(&param);
-    }
-  }
-  {
-    CFWL_ThemeBackground param;
-    param.m_pWidget = m_pInterface;
-    param.m_iPart = FWL_PART_CMB_DropDownButton;
-    param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
-                           ? FWL_PARTSTATE_CMB_Disabled
-                           : m_iBtnState;
-    param.m_pGraphics = pGraphics;
-    param.m_matrix.Concat(*pMatrix);
-    param.m_rtPart = m_rtBtn;
-    pTheme->DrawBackground(&param);
-  }
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboBoxImp::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
-  if (!pThemeProvider)
-    return FWL_ERR_Indefinite;
-  m_pProperties->m_pThemeProvider = pThemeProvider;
-  if (m_pListBox && pThemeProvider->IsValidWidget(m_pListBox.get())) {
-    m_pListBox->SetThemeProvider(pThemeProvider);
-  }
-  if (m_pEdit && pThemeProvider->IsValidWidget(m_pEdit.get())) {
-    m_pEdit->SetThemeProvider(pThemeProvider);
-  }
-  return FWL_ERR_Succeeded;
-}
-int32_t CFWL_ComboBoxImp::GetCurSel() {
-  return m_iCurSel;
-}
-FWL_ERR CFWL_ComboBoxImp::SetCurSel(int32_t iSel) {
-  int32_t iCount =
-      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->CountItems();
-  FX_BOOL bClearSel = iSel < 0 || iSel >= iCount;
-  FX_BOOL bDropDown = IsDropDownStyle();
-  if (bDropDown && m_pEdit) {
-    if (bClearSel) {
-      m_pEdit->SetText(CFX_WideString());
-    } else {
-      CFX_WideString wsText;
-      IFWL_ComboBoxDP* pData =
-          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iSel);
-      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
-          ->GetItemText(hItem, wsText);
-      m_pEdit->SetText(wsText);
-    }
-    m_pEdit->Update();
-  }
-  m_iCurSel = bClearSel ? -1 : iSel;
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboBoxImp::SetStates(FX_DWORD dwStates, FX_BOOL bSet) {
-  FX_BOOL bIsDropDown = IsDropDownStyle();
-  if (bIsDropDown && m_pEdit) {
-    m_pEdit->SetStates(dwStates, bSet);
-  }
-  if (m_pListBox) {
-    m_pListBox->SetStates(dwStates, bSet);
-  }
-  return CFWL_WidgetImp::SetStates(dwStates, bSet);
-}
-FWL_ERR CFWL_ComboBoxImp::SetEditText(const CFX_WideString& wsText) {
-  if (!m_pEdit)
-    return FWL_ERR_Indefinite;
-  m_pEdit->SetText(wsText);
-  return m_pEdit->Update();
-}
-int32_t CFWL_ComboBoxImp::GetEditTextLength() const {
-  if (!m_pEdit)
-    return -1;
-  return m_pEdit->GetTextLength();
-}
-FWL_ERR CFWL_ComboBoxImp::GetEditText(CFX_WideString& wsText,
-                                      int32_t nStart,
-                                      int32_t nCount) const {
-  if (m_pEdit) {
-    return m_pEdit->GetText(wsText, nStart, nCount);
-  } else if (m_pListBox) {
-    IFWL_ComboBoxDP* pData =
-        static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
-    return m_pListBox->GetItemText(hItem, wsText);
-  }
-  return FWL_ERR_Indefinite;
-}
-FWL_ERR CFWL_ComboBoxImp::SetEditSelRange(int32_t nStart, int32_t nCount) {
-  if (!m_pEdit)
-    return FWL_ERR_Indefinite;
-  static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->ClearSelected();
-  m_pEdit->AddSelRange(nStart, nCount);
-  return FWL_ERR_Succeeded;
-}
-int32_t CFWL_ComboBoxImp::GetEditSelRange(int32_t nIndex, int32_t& nStart) {
-  if (!m_pEdit)
-    return -1;
-  return m_pEdit->GetSelRange(nIndex, nStart);
-}
-int32_t CFWL_ComboBoxImp::GetEditLimit() {
-  if (!m_pEdit)
-    return -1;
-  return m_pEdit->GetLimit();
-}
-FWL_ERR CFWL_ComboBoxImp::SetEditLimit(int32_t nLimit) {
-  if (!m_pEdit)
-    return FWL_ERR_Indefinite;
-  return m_pEdit->SetLimit(nLimit);
-}
-FWL_ERR CFWL_ComboBoxImp::EditDoClipboard(int32_t iCmd) {
-  if (!m_pEdit)
-    return FWL_ERR_Indefinite;
-  return m_pEdit->DoClipboard(iCmd);
-}
-FX_BOOL CFWL_ComboBoxImp::EditRedo(const CFX_ByteStringC& bsRecord) {
-  if (!m_pEdit)
-    return FALSE;
-  return m_pEdit->Redo(bsRecord);
-}
-FX_BOOL CFWL_ComboBoxImp::EditUndo(const CFX_ByteStringC& bsRecord) {
-  if (!m_pEdit)
-    return FALSE;
-  return m_pEdit->Undo(bsRecord);
-}
-IFWL_ListBox* CFWL_ComboBoxImp::GetListBoxt() {
-  return m_pListBox.get();
-}
-FX_BOOL CFWL_ComboBoxImp::AfterFocusShowDropList() {
-  if (!m_bNeedShowList) {
-    return FALSE;
-  }
-  if (m_pEdit) {
-    MatchEditText();
-  }
-  ShowDropList(TRUE);
-  m_bNeedShowList = FALSE;
-  return TRUE;
-}
-FX_ERR CFWL_ComboBoxImp::OpenDropDownList(FX_BOOL bActivate) {
-  ShowDropList(bActivate);
-  return FWL_ERR_Succeeded;
-}
-FX_BOOL CFWL_ComboBoxImp::EditCanUndo() {
-  return m_pEdit->CanUndo();
-}
-FX_BOOL CFWL_ComboBoxImp::EditCanRedo() {
-  return m_pEdit->CanRedo();
-}
-FX_BOOL CFWL_ComboBoxImp::EditUndo() {
-  return m_pEdit->Undo();
-}
-FX_BOOL CFWL_ComboBoxImp::EditRedo() {
-  return m_pEdit->Redo();
-}
-FX_BOOL CFWL_ComboBoxImp::EditCanCopy() {
-  return m_pEdit->CountSelRanges() > 0;
-}
-FX_BOOL CFWL_ComboBoxImp::EditCanCut() {
-  if (m_pEdit->GetStylesEx() & FWL_STYLEEXT_EDT_ReadOnly) {
-    return FALSE;
-  }
-  return m_pEdit->CountSelRanges() > 0;
-}
-FX_BOOL CFWL_ComboBoxImp::EditCanSelectAll() {
-  return m_pEdit->GetTextLength() > 0;
-}
-FX_BOOL CFWL_ComboBoxImp::EditCopy(CFX_WideString& wsCopy) {
-  return m_pEdit->Copy(wsCopy);
-}
-FX_BOOL CFWL_ComboBoxImp::EditCut(CFX_WideString& wsCut) {
-  return m_pEdit->Cut(wsCut);
-}
-FX_BOOL CFWL_ComboBoxImp::EditPaste(const CFX_WideString& wsPaste) {
-  return m_pEdit->Paste(wsPaste);
-}
-FX_BOOL CFWL_ComboBoxImp::EditSelectAll() {
-  return m_pEdit->AddSelRange(0) == FWL_ERR_Succeeded;
-}
-FX_BOOL CFWL_ComboBoxImp::EditDelete() {
-  return m_pEdit->ClearText() == FWL_ERR_Succeeded;
-}
-FX_BOOL CFWL_ComboBoxImp::EditDeSelect() {
-  return m_pEdit->ClearSelections() == FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboBoxImp::GetBBox(CFX_RectF& rect) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_GetBBox(rect);
-  }
-  rect = m_pProperties->m_rtWidget;
-  if (m_pListBox && IsDropListShowed()) {
-    CFX_RectF rtList;
-    m_pListBox->GetWidgetRect(rtList);
-    rtList.Offset(rect.left, rect.top);
-    rect.Union(rtList);
-  }
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboBoxImp::EditModifyStylesEx(FX_DWORD dwStylesExAdded,
-                                             FX_DWORD dwStylesExRemoved) {
-  if (m_pEdit != NULL) {
-    return m_pEdit->ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-  } else {
-    return FWL_ERR_Parameter_Invalid;
-  }
-}
-FX_FLOAT CFWL_ComboBoxImp::GetListHeight() {
-  return static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider)
-      ->GetListHeight(m_pInterface);
-}
-void CFWL_ComboBoxImp::DrawStretchHandler(CFX_Graphics* pGraphics,
-                                          const CFX_Matrix* pMatrix) {
-  CFWL_ThemeBackground param;
-  param.m_pGraphics = pGraphics;
-  param.m_iPart = FWL_PART_CMB_StretcgHandler;
-  param.m_dwStates = FWL_PARTSTATE_CMB_Normal;
-  param.m_pWidget = m_pInterface;
-  if (pMatrix) {
-    param.m_matrix.Concat(*pMatrix);
-  }
-  param.m_rtPart = m_rtHandler;
-  m_pProperties->m_pThemeProvider->DrawBackground(&param);
-}
-void CFWL_ComboBoxImp::ShowDropList(FX_BOOL bActivate) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_ShowDropList(bActivate);
-  }
-  FX_BOOL bDropList = IsDropListShowed();
-  if (bDropList == bActivate) {
-    return;
-  }
-  if (!m_pForm) {
-    InitProxyForm();
-  }
-  m_pListProxyDelegate->Reset();
-  if (bActivate) {
-    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
-        ->ChangeSelected(m_iCurSel);
-    ReSetListItemAlignment();
-    FX_DWORD dwStyleAdd = m_pProperties->m_dwStyleExes &
-                          (FWL_STYLEEXT_CMB_Sort | FWL_STYLEEXT_CMB_OwnerDraw);
-    m_pListBox->ModifyStylesEx(dwStyleAdd, 0);
-    m_pListBox->GetWidgetRect(m_rtList, TRUE);
-    FX_FLOAT fHeight = GetListHeight();
-    if (fHeight > 0) {
-      if (m_rtList.height > GetListHeight()) {
-        m_rtList.height = GetListHeight();
-        m_pListBox->ModifyStyles(FWL_WGTSTYLE_VScroll, 0);
-      }
-    }
-    CFX_RectF rtAnchor;
-    rtAnchor.Set(0, 0, m_pProperties->m_rtWidget.width,
-                 m_pProperties->m_rtWidget.height);
-    FX_FLOAT fMinHeight = 0;
-    if (m_rtList.width < m_rtClient.width) {
-      m_rtList.width = m_rtClient.width;
-    }
-    m_rtProxy = m_rtList;
-    if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListDrag) {
-      m_rtProxy.height += m_fComboFormHandler;
-    }
-    GetPopupPos(fMinHeight, m_rtProxy.height, rtAnchor, m_rtProxy);
-    if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListDrag) {
-      FX_FLOAT fx = 0;
-      FX_FLOAT fy = m_rtClient.top + m_rtClient.height / 2;
-      TransformTo(NULL, fx, fy);
-      m_bUpFormHandler = fy > m_rtProxy.top;
-      if (m_bUpFormHandler) {
-        m_rtHandler.Set(0, 0, m_rtList.width, m_fComboFormHandler);
-        m_rtList.top = m_fComboFormHandler;
-      } else {
-        m_rtHandler.Set(0, m_rtList.height, m_rtList.width,
-                        m_fComboFormHandler);
-      }
-    }
-    m_pForm->SetWidgetRect(m_rtProxy);
-    m_pForm->Update();
-    m_pListBox->SetWidgetRect(m_rtList);
-    m_pListBox->Update();
-    CFWL_EvtCmbPreDropDown ev;
-    ev.m_pSrcTarget = m_pInterface;
-    DispatchEvent(&ev);
-    m_fItemHeight =
-        static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->m_fItemHeight;
-    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->SetFocus(TRUE);
-    m_pForm->DoModal();
-    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->SetFocus(FALSE);
-  } else {
-    m_pForm->EndDoModal();
-    CFWL_EvtCmbCloseUp ev;
-    ev.m_pSrcTarget = m_pInterface;
-    DispatchEvent(&ev);
-    m_bLButtonDown = FALSE;
-    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->m_bNotifyOwner =
-        TRUE;
-    SetFocus(TRUE);
-  }
-}
-FX_BOOL CFWL_ComboBoxImp::IsDropListShowed() {
-  return m_pForm && !(m_pForm->GetStates() & FWL_WGTSTATE_Invisible);
-}
-FX_BOOL CFWL_ComboBoxImp::IsDropDownStyle() const {
-  return m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_DropDown;
-}
-void CFWL_ComboBoxImp::MatchEditText() {
-  CFX_WideString wsText;
-  m_pEdit->GetText(wsText);
-  int32_t iMatch =
-      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->MatchItem(wsText);
-  if (iMatch != m_iCurSel) {
-    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
-        ->ChangeSelected(iMatch);
-    if (iMatch >= 0) {
-      SynchrEditText(iMatch);
-    }
-  } else if (iMatch >= 0) {
-    static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->SetSelected();
-  }
-  m_iCurSel = iMatch;
-}
-void CFWL_ComboBoxImp::SynchrEditText(int32_t iListItem) {
-  CFX_WideString wsText;
-  IFWL_ComboBoxDP* pData =
-      static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iListItem);
-  static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
-      ->GetItemText(hItem, wsText);
-  m_pEdit->SetText(wsText);
-  m_pEdit->Update();
-  static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->SetSelected();
-}
-void CFWL_ComboBoxImp::Layout() {
-  if (m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_Layout();
-  }
-  GetClientRect(m_rtClient);
-  FX_FLOAT* pFWidth =
-      static_cast<FX_FLOAT*>(GetThemeCapacity(FWL_WGTCAPACITY_ScrollBarWidth));
-  if (!pFWidth)
-    return;
-  FX_FLOAT fBtn = *pFWidth;
-  m_rtBtn.Set(m_rtClient.right() - fBtn, m_rtClient.top, fBtn,
-              m_rtClient.height);
-  FX_BOOL bIsDropDown = IsDropDownStyle();
-  if (bIsDropDown && m_pEdit) {
-    CFX_RectF rtEdit;
-    rtEdit.Set(m_rtClient.left, m_rtClient.top, m_rtClient.width - fBtn,
-               m_rtClient.height);
-    m_pEdit->SetWidgetRect(rtEdit);
-    if (m_iCurSel >= 0) {
-      CFX_WideString wsText;
-      IFWL_ComboBoxDP* pData =
-          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
-      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
-          ->GetItemText(hItem, wsText);
-      m_pEdit->LockUpdate();
-      m_pEdit->SetText(wsText);
-      m_pEdit->UnlockUpdate();
-    }
-    m_pEdit->Update();
-  }
-}
-void CFWL_ComboBoxImp::ReSetTheme() {
-  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
-  if (!pTheme) {
-    pTheme = GetAvailableTheme();
-    m_pProperties->m_pThemeProvider = pTheme;
-  }
-  if (m_pListBox) {
-    if (!m_pListBox->GetThemeProvider() &&
-        pTheme->IsValidWidget(m_pListBox.get())) {
-      m_pListBox->SetThemeProvider(pTheme);
-    }
-  }
-  if (m_pEdit) {
-    if (!m_pEdit->GetThemeProvider() && pTheme->IsValidWidget(m_pEdit.get())) {
-      m_pEdit->SetThemeProvider(pTheme);
-    }
-  }
-}
-void CFWL_ComboBoxImp::ReSetEditAlignment() {
-  if (!m_pEdit)
-    return;
-  FX_DWORD dwStylExes = m_pProperties->m_dwStyleExes;
-  FX_DWORD dwAdd = 0;
-  switch (dwStylExes & FWL_STYLEEXT_CMB_EditHAlignMask) {
-    case FWL_STYLEEXT_CMB_EditHCenter: {
-      dwAdd |= FWL_STYLEEXT_EDT_HCenter;
-      break;
-    }
-    case FWL_STYLEEXT_CMB_EditHFar: {
-      dwAdd |= FWL_STYLEEXT_EDT_HFar;
-      break;
-    }
-    default: { dwAdd |= FWL_STYLEEXT_EDT_HNear; }
-  }
-  switch (dwStylExes & FWL_STYLEEXT_CMB_EditVAlignMask) {
-    case FWL_STYLEEXT_CMB_EditVCenter: {
-      dwAdd |= FWL_STYLEEXT_EDT_VCenter;
-      break;
-    }
-    case FWL_STYLEEXT_CMB_EditVFar: {
-      dwAdd |= FWL_STYLEEXT_EDT_VFar;
-      break;
-    }
-    default: { dwAdd |= FWL_STYLEEXT_EDT_VNear; }
-  }
-  if (dwStylExes & FWL_STYLEEXT_CMB_EditJustified) {
-    dwAdd |= FWL_STYLEEXT_EDT_Justified;
-  }
-  if (dwStylExes & FWL_STYLEEXT_CMB_EditDistributed) {
-    dwAdd |= FWL_STYLEEXT_EDT_Distributed;
-  }
-  m_pEdit->ModifyStylesEx(dwAdd, FWL_STYLEEXT_EDT_HAlignMask |
-                                     FWL_STYLEEXT_EDT_HAlignModeMask |
-                                     FWL_STYLEEXT_EDT_VAlignMask);
-}
-void CFWL_ComboBoxImp::ReSetListItemAlignment() {
-  if (!m_pListBox)
-    return;
-  FX_DWORD dwStylExes = m_pProperties->m_dwStyleExes;
-  FX_DWORD dwAdd = 0;
-  switch (dwStylExes & FWL_STYLEEXT_CMB_ListItemAlignMask) {
-    case FWL_STYLEEXT_CMB_ListItemCenterAlign: {
-      dwAdd |= FWL_STYLEEXT_LTB_CenterAlign;
-    }
-    case FWL_STYLEEXT_CMB_ListItemRightAlign: {
-      dwAdd |= FWL_STYLEEXT_LTB_RightAlign;
-    }
-    default: { dwAdd |= FWL_STYLEEXT_LTB_LeftAlign; }
-  }
-  m_pListBox->ModifyStylesEx(dwAdd, FWL_STYLEEXT_CMB_ListItemAlignMask);
-}
-void CFWL_ComboBoxImp::ProcessSelChanged(FX_BOOL bLButtonUp) {
-  IFWL_ComboBoxDP* pDatas =
-      static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-  m_iCurSel = pDatas->GetItemIndex(m_pInterface, m_pListBox->GetSelItem(0));
-  FX_BOOL bDropDown = IsDropDownStyle();
-  if (bDropDown) {
-    IFWL_ComboBoxDP* pData =
-        static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
-    if (hItem) {
-      CFX_WideString wsText;
-      pData->GetItemText(m_pInterface, hItem, wsText);
-      if (m_pEdit) {
-        m_pEdit->SetText(wsText);
-        m_pEdit->Update();
-        static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->SetSelected();
-      }
-      CFWL_EvtCmbSelChanged ev;
-      ev.bLButtonUp = bLButtonUp;
-      ev.m_pSrcTarget = m_pInterface;
-      ev.iArraySels.Add(m_iCurSel);
-      DispatchEvent(&ev);
-    }
-  } else {
-    Repaint(&m_rtClient);
-  }
-}
-void CFWL_ComboBoxImp::InitProxyForm() {
-  if (m_pForm)
-    return;
-  if (!m_pListBox)
-    return;
-  CFWL_WidgetImpProperties propForm;
-  propForm.m_pOwner = m_pInterface;
-  propForm.m_dwStyles = FWL_WGTSTYLE_Popup;
-  propForm.m_dwStates = FWL_WGTSTATE_Invisible;
-  CFX_WideString className;
-  m_pForm = IFWL_Form::CreateFormProxy(propForm, &className, m_pListBox.get());
-  m_pForm->Initialize();
-  m_pProxy = static_cast<CFWL_FormProxyImp*>(m_pForm->GetImpl());
-  m_pListBox->SetParent(m_pForm);
-  m_pListProxyDelegate = new CFWL_ComboProxyImpDelegate(m_pForm, this);
-  m_pProxy->SetDelegate(m_pListProxyDelegate);
-}
-FWL_ERR CFWL_ComboBoxImp::DisForm_Initialize() {
-  if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
-    return FWL_WGTSTATE_Invisible;  // Ditto.
-  m_pDelegate = new CFWL_ComboBoxImpDelegate(this);
-  DisForm_InitComboList();
-  DisForm_InitComboEdit();
-  return FWL_ERR_Succeeded;
-}
-void CFWL_ComboBoxImp::DisForm_InitComboList() {
-  if (m_pListBox) {
-    return;
-  }
-  CFWL_WidgetImpProperties prop;
-  prop.m_pParent = m_pInterface;
-  prop.m_dwStyles = FWL_WGTSTYLE_Border | FWL_WGTSTYLE_VScroll;
-  prop.m_dwStates = FWL_WGTSTATE_Invisible;
-  prop.m_pDataProvider = m_pProperties->m_pDataProvider;
-  prop.m_pThemeProvider = m_pProperties->m_pThemeProvider;
-  m_pListBox.reset(IFWL_ListBox::CreateComboList(prop, m_pInterface));
-  m_pListBox->Initialize();
-}
-void CFWL_ComboBoxImp::DisForm_InitComboEdit() {
-  if (m_pEdit) {
-    return;
-  }
-  CFWL_WidgetImpProperties prop;
-  prop.m_pParent = m_pInterface;
-  prop.m_pThemeProvider = m_pProperties->m_pThemeProvider;
-  m_pEdit.reset(IFWL_Edit::CreateComboEdit(prop, m_pInterface));
-  m_pEdit->Initialize();
-  static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->SetOuter(m_pInterface);
-}
-void CFWL_ComboBoxImp::DisForm_ShowDropList(FX_BOOL bActivate) {
-  FX_BOOL bDropList = DisForm_IsDropListShowed();
-  if (bDropList == bActivate) {
-    return;
-  }
-  if (bActivate) {
-    CFWL_EvtCmbPreDropDown preEvent;
-    preEvent.m_pSrcTarget = m_pInterface;
-    DispatchEvent(&preEvent);
-    CFWL_ComboListImp* pComboList =
-        static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl());
-    int32_t iItems = pComboList->CountItems();
-    if (iItems < 1) {
-      return;
-    }
-    ReSetListItemAlignment();
-    pComboList->ChangeSelected(m_iCurSel);
-    FX_FLOAT fItemHeight = pComboList->GetItemHeigt();
-    FX_FLOAT fBorder = GetBorderSize();
-    FX_FLOAT fPopupMin = 0.0f;
-    if (iItems > 3) {
-      fPopupMin = fItemHeight * 3 + fBorder * 2;
-    }
-    FX_FLOAT fPopupMax = fItemHeight * iItems + fBorder * 2;
-    CFX_RectF rtList;
-    rtList.left = m_rtClient.left;
-    rtList.width = m_pProperties->m_rtWidget.width;
-    rtList.top = 0;
-    rtList.height = 0;
-    GetPopupPos(fPopupMin, fPopupMax, m_pProperties->m_rtWidget, rtList);
-    m_pListBox->SetWidgetRect(rtList);
-    m_pListBox->Update();
-  } else {
-    SetFocus(TRUE);
-  }
-  m_pListBox->SetStates(FWL_WGTSTATE_Invisible, !bActivate);
-  if (bActivate) {
-    CFWL_EvtCmbPostDropDown postEvent;
-    postEvent.m_pSrcTarget = m_pInterface;
-    DispatchEvent(&postEvent);
-  }
-  CFX_RectF rect;
-  m_pListBox->GetWidgetRect(rect);
-  rect.Inflate(2, 2);
-  Repaint(&rect);
-}
-FX_BOOL CFWL_ComboBoxImp::DisForm_IsDropListShowed() {
-  return !(m_pListBox->GetStates() & FWL_WGTSTATE_Invisible);
-}
-FWL_ERR CFWL_ComboBoxImp::DisForm_ModifyStylesEx(FX_DWORD dwStylesExAdded,
-                                                 FX_DWORD dwStylesExRemoved) {
-  if (!m_pEdit) {
-    DisForm_InitComboEdit();
-  }
-  FX_BOOL bAddDropDown = dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown;
-  FX_BOOL bDelDropDown = dwStylesExRemoved & FWL_STYLEEXT_CMB_DropDown;
-  dwStylesExRemoved &= ~FWL_STYLEEXT_CMB_DropDown;
-  m_pProperties->m_dwStyleExes |= FWL_STYLEEXT_CMB_DropDown;
-  if (bAddDropDown) {
-    m_pEdit->ModifyStylesEx(0, FWL_STYLEEXT_EDT_ReadOnly);
-  } else if (bDelDropDown) {
-    m_pEdit->ModifyStylesEx(FWL_STYLEEXT_EDT_ReadOnly, 0);
-  }
-  return CFWL_WidgetImp::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
-}
-FWL_ERR CFWL_ComboBoxImp::DisForm_Update() {
-  if (m_iLock) {
-    return FWL_ERR_Indefinite;
-  }
-  if (m_pEdit) {
-    ReSetEditAlignment();
-  }
-  ReSetTheme();
-  Layout();
-  return FWL_ERR_Succeeded;
-}
-FX_DWORD CFWL_ComboBoxImp::DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy) {
-  CFX_RectF rect;
-  rect.Set(0, 0, m_pProperties->m_rtWidget.width - m_rtBtn.width,
-           m_pProperties->m_rtWidget.height);
-  if (rect.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Edit;
-  }
-  if (m_rtBtn.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Client;
-  }
-  if (DisForm_IsDropListShowed()) {
-    m_pListBox->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Client;
-    }
-  }
-  return FWL_WGTHITTEST_Unknown;
-}
-FWL_ERR CFWL_ComboBoxImp::DisForm_DrawWidget(CFX_Graphics* pGraphics,
-                                             const CFX_Matrix* pMatrix) {
-  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
-  CFX_Matrix mtOrg;
-  mtOrg.Set(1, 0, 0, 1, 0, 0);
-  if (pMatrix) {
-    mtOrg = *pMatrix;
-  }
-  FX_BOOL bListShowed = m_pListBox && DisForm_IsDropListShowed();
-  pGraphics->SaveGraphState();
-  pGraphics->ConcatMatrix(&mtOrg);
-  if (!m_rtBtn.IsEmpty(0.1f)) {
-    CFWL_ThemeBackground param;
-    param.m_pWidget = m_pInterface;
-    param.m_iPart = FWL_PART_CMB_DropDownButton;
-    param.m_dwStates = m_iBtnState;
-    param.m_pGraphics = pGraphics;
-    param.m_rtPart = m_rtBtn;
-    pTheme->DrawBackground(&param);
-  }
-  pGraphics->RestoreGraphState();
-  if (m_pEdit) {
-    CFX_RectF rtEdit;
-    m_pEdit->GetWidgetRect(rtEdit);
-    CFX_Matrix mt;
-    mt.Set(1, 0, 0, 1, rtEdit.left, rtEdit.top);
-    mt.Concat(mtOrg);
-    m_pEdit->DrawWidget(pGraphics, &mt);
-  }
-  if (bListShowed) {
-    CFX_RectF rtList;
-    m_pListBox->GetWidgetRect(rtList);
-    CFX_Matrix mt;
-    mt.Set(1, 0, 0, 1, rtList.left, rtList.top);
-    mt.Concat(mtOrg);
-    m_pListBox->DrawWidget(pGraphics, &mt);
-  }
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboBoxImp::DisForm_GetBBox(CFX_RectF& rect) {
-  rect = m_pProperties->m_rtWidget;
-  if (m_pListBox && DisForm_IsDropListShowed()) {
-    CFX_RectF rtList;
-    m_pListBox->GetWidgetRect(rtList);
-    rtList.Offset(rect.left, rect.top);
-    rect.Union(rtList);
-  }
-  return FWL_ERR_Succeeded;
-}
-void CFWL_ComboBoxImp::DisForm_Layout() {
-  GetClientRect(m_rtClient);
-  m_rtContent = m_rtClient;
-  FX_FLOAT* pFWidth =
-      static_cast<FX_FLOAT*>(GetThemeCapacity(FWL_WGTCAPACITY_ScrollBarWidth));
-  if (!pFWidth)
-    return;
-  FX_FLOAT borderWidth = 0;
-  { borderWidth = FWL_PART_CMB_Border; }
-  FX_FLOAT fBtn = *pFWidth;
-  if (!(this->GetStylesEx() & FWL_STYLEEXT_CMB_ReadOnly)) {
-    m_rtBtn.Set(m_rtClient.right() - fBtn, m_rtClient.top + borderWidth,
-                fBtn - borderWidth, m_rtClient.height - 2 * borderWidth);
-  }
-  CFX_RectF* pUIMargin =
-      static_cast<CFX_RectF*>(GetThemeCapacity(FWL_WGTCAPACITY_UIMargin));
-  if (pUIMargin) {
-    m_rtContent.Deflate(pUIMargin->left, pUIMargin->top, pUIMargin->width,
-                        pUIMargin->height);
-  }
-  FX_BOOL bIsDropDown = IsDropDownStyle();
-  if (bIsDropDown && m_pEdit) {
-    CFX_RectF rtEdit;
-    rtEdit.Set(m_rtContent.left, m_rtContent.top, m_rtContent.width - fBtn,
-               m_rtContent.height);
-    m_pEdit->SetWidgetRect(rtEdit);
-    if (m_iCurSel >= 0) {
-      CFX_WideString wsText;
-      IFWL_ComboBoxDP* pData =
-          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
-      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
-          ->GetItemText(hItem, wsText);
-      m_pEdit->LockUpdate();
-      m_pEdit->SetText(wsText);
-      m_pEdit->UnlockUpdate();
-    }
-    m_pEdit->Update();
-  }
-}
-CFWL_ComboBoxImpDelegate::CFWL_ComboBoxImpDelegate(CFWL_ComboBoxImp* pOwner)
-    : m_pOwner(pOwner) {}
-int32_t CFWL_ComboBoxImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
-  if (m_pOwner->m_pWidgetMgr->IsFormDisabled()) {
-    return DisForm_OnProcessMessage(pMessage);
-  }
-  if (!pMessage)
-    return 0;
-  FX_DWORD dwMsgCode = pMessage->GetClassID();
-  FX_BOOL iRet = 1;
-  switch (dwMsgCode) {
-    case FWL_MSGHASH_SetFocus:
-    case FWL_MSGHASH_KillFocus: {
-      OnFocusChanged(pMessage, dwMsgCode == FWL_MSGHASH_SetFocus);
-      break;
-    }
-    case FWL_MSGHASH_Mouse: {
-      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
-      FX_DWORD dwCmd = pMsg->m_dwCmd;
-      switch (dwCmd) {
-        case FWL_MSGMOUSECMD_LButtonDown: {
-          OnLButtonDown(pMsg);
-          break;
-        }
-        case FWL_MSGMOUSECMD_LButtonUp: {
-          OnLButtonUp(pMsg);
-          break;
-        }
-        case FWL_MSGMOUSECMD_MouseMove: {
-          OnMouseMove(pMsg);
-          break;
-        }
-        case FWL_MSGMOUSECMD_MouseLeave: {
-          OnMouseLeave(pMsg);
-          break;
-        }
-        default: {}
-      }
-      break;
-    }
-    case FWL_MSGHASH_Key: {
-      OnKey(static_cast<CFWL_MsgKey*>(pMessage));
-      break;
-    }
-    default: { iRet = 0; }
-  }
-  CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
-  return iRet;
-}
-FWL_ERR CFWL_ComboBoxImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {
-  FX_DWORD dwFlag = pEvent->GetClassID();
-  if (dwFlag == FWL_EVTHASH_LTB_DrawItem) {
-    CFWL_EvtLtbDrawItem* pDrawItemEvent =
-        static_cast<CFWL_EvtLtbDrawItem*>(pEvent);
-    CFWL_EvtCmbDrawItem pTemp;
-    pTemp.m_pSrcTarget = m_pOwner->m_pInterface;
-    pTemp.m_pGraphics = pDrawItemEvent->m_pGraphics;
-    pTemp.m_index = pDrawItemEvent->m_index;
-    pTemp.m_rtItem = pDrawItemEvent->m_rect;
-    m_pOwner->DispatchEvent(&pTemp);
-  } else if (dwFlag == FWL_EVTHASH_Scroll) {
-    CFWL_EvtScroll* pScrollEvent = static_cast<CFWL_EvtScroll*>(pEvent);
-    CFWL_EvtScroll pScrollEv;
-    pScrollEv.m_pSrcTarget = m_pOwner->m_pInterface;
-    pScrollEv.m_iScrollCode = pScrollEvent->m_iScrollCode;
-    pScrollEv.m_fPos = pScrollEvent->m_fPos;
-    m_pOwner->DispatchEvent(&pScrollEv);
-  } else if (dwFlag == FWL_EVTHASH_EDT_TextChanged) {
-    CFWL_EvtEdtTextChanged* pTextChangedEvent =
-        static_cast<CFWL_EvtEdtTextChanged*>(pEvent);
-    CFWL_EvtCmbEditChanged pTemp;
-    pTemp.m_pSrcTarget = m_pOwner->m_pInterface;
-    pTemp.wsInsert = pTextChangedEvent->wsInsert;
-    pTemp.wsDelete = pTextChangedEvent->wsDelete;
-    pTemp.nChangeType = pTextChangedEvent->nChangeType;
-    m_pOwner->DispatchEvent(&pTemp);
-  }
-  return FWL_ERR_Succeeded;
-}
-FWL_ERR CFWL_ComboBoxImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
-                                               const CFX_Matrix* pMatrix) {
-  return m_pOwner->DrawWidget(pGraphics, pMatrix);
-}
-void CFWL_ComboBoxImpDelegate::OnFocusChanged(CFWL_Message* pMsg,
-                                              FX_BOOL bSet) {
-  IFWL_Target* pDstTarget = pMsg->m_pDstTarget;
-  IFWL_Target* pSrcTarget = pMsg->m_pSrcTarget;
-  FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
-  if (bSet) {
-    m_pOwner->m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
-    if (bDropDown && pSrcTarget != m_pOwner->m_pListBox.get()) {
-      if (!m_pOwner->m_pEdit)
-        return;
-      static_cast<CFWL_ComboEditImp*>(m_pOwner->m_pEdit->GetImpl())
-          ->SetSelected();
-    } else {
-      m_pOwner->Repaint(&m_pOwner->m_rtClient);
-    }
-  } else {
-    m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
-    if (bDropDown && pDstTarget != m_pOwner->m_pListBox.get()) {
-      if (!m_pOwner->m_pEdit)
-        return;
-      static_cast<CFWL_ComboEditImp*>(m_pOwner->m_pEdit->GetImpl())
-          ->FlagFocus(FALSE);
-      static_cast<CFWL_ComboEditImp*>(m_pOwner->m_pEdit->GetImpl())
-          ->ClearSelected();
-    } else {
-      m_pOwner->Repaint(&m_pOwner->m_rtClient);
-    }
-  }
-}
-void CFWL_ComboBoxImpDelegate::OnLButtonDown(CFWL_MsgMouse* pMsg) {
-  if (m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
-    return;
-  }
-  FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
-  CFX_RectF& rtBtn = bDropDown ? m_pOwner->m_rtBtn : m_pOwner->m_rtClient;
-  FX_BOOL bClickBtn = rtBtn.Contains(pMsg->m_fx, pMsg->m_fy);
-  if (bClickBtn) {
-    if (bDropDown && m_pOwner->m_pEdit) {
-      m_pOwner->MatchEditText();
-    }
-    m_pOwner->m_bLButtonDown = TRUE;
-    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Pressed;
-    m_pOwner->Repaint(&m_pOwner->m_rtClient);
-    m_pOwner->ShowDropList(TRUE);
-    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Normal;
-    m_pOwner->Repaint(&m_pOwner->m_rtClient);
-  }
-}
-void CFWL_ComboBoxImpDelegate::OnLButtonUp(CFWL_MsgMouse* pMsg) {
-  m_pOwner->m_bLButtonDown = FALSE;
-  if (m_pOwner->m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
-    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Hovered;
-  } else {
-    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Normal;
-  }
-  m_pOwner->Repaint(&m_pOwner->m_rtBtn);
-}
-void CFWL_ComboBoxImpDelegate::OnMouseMove(CFWL_MsgMouse* pMsg) {
-  int32_t iOldState = m_pOwner->m_iBtnState;
-  if (m_pOwner->m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
-    m_pOwner->m_iBtnState = m_pOwner->m_bLButtonDown
-                                ? FWL_PARTSTATE_CMB_Pressed
-                                : FWL_PARTSTATE_CMB_Hovered;
-  } else {
-    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Normal;
-  }
-  if ((iOldState != m_pOwner->m_iBtnState) &&
-      !((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) ==
-        FWL_WGTSTATE_Disabled)) {
-    m_pOwner->Repaint(&m_pOwner->m_rtBtn);
-  }
-}
-void CFWL_ComboBoxImpDelegate::OnMouseLeave(CFWL_MsgMouse* pMsg) {
-  if (!m_pOwner->IsDropListShowed() &&
-      !((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) ==
-        FWL_WGTSTATE_Disabled)) {
-    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Normal;
-    m_pOwner->Repaint(&m_pOwner->m_rtBtn);
-  }
-}
-void CFWL_ComboBoxImpDelegate::OnKey(CFWL_MsgKey* pMsg) {
-  FX_DWORD dwKeyCode = pMsg->m_dwKeyCode;
-  if (dwKeyCode == FWL_VKEY_Tab) {
-    m_pOwner->DispatchKeyEvent(pMsg);
-    return;
-  }
-  FX_BOOL bSubCtrlKey = pMsg->m_pDstTarget == m_pOwner->m_pInterface;
-  if (bSubCtrlKey) {
-    DoSubCtrlKey(pMsg);
-  }
-}
-void CFWL_ComboBoxImpDelegate::DoSubCtrlKey(CFWL_MsgKey* pMsg) {
-  FX_DWORD dwKeyCode = pMsg->m_dwKeyCode;
-  FX_BOOL bUp = dwKeyCode == FWL_VKEY_Up;
-  FX_BOOL bDown = dwKeyCode == FWL_VKEY_Down;
-  if (bUp || bDown) {
-    int32_t iCount = static_cast<CFWL_ComboListImp*>(
-                         m_pOwner->m_pListBox->GetImpl())->CountItems();
-    if (iCount < 1) {
-      return;
-    }
-    FX_BOOL bMatchEqual = FALSE;
-    int32_t iCurSel = m_pOwner->m_iCurSel;
-    FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
-    if (bDropDown && m_pOwner->m_pEdit) {
-      CFX_WideString wsText;
-      m_pOwner->m_pEdit->GetText(wsText);
-      iCurSel = static_cast<CFWL_ComboListImp*>(m_pOwner->m_pListBox->GetImpl())
-                    ->MatchItem(wsText);
-      if (iCurSel >= 0) {
-        CFX_WideString wsTemp;
-        IFWL_ComboBoxDP* pData = static_cast<IFWL_ComboBoxDP*>(
-            m_pOwner->m_pProperties->m_pDataProvider);
-        FWL_HLISTITEM hItem = pData->GetItem(m_pOwner->m_pInterface, iCurSel);
-        static_cast<CFWL_ComboListImp*>(m_pOwner->m_pListBox->GetImpl())
-            ->GetItemText(hItem, wsTemp);
-        bMatchEqual = wsText.Equal(wsTemp);
-      }
-    }
-    if (iCurSel < 0) {
-      iCurSel = 0;
-    } else if (!bDropDown || bMatchEqual) {
-      if ((bUp && iCurSel == 0) || (bDown && iCurSel == iCount - 1)) {
-        return;
-      }
-      if (bUp) {
-        iCurSel--;
-      } else {
-        iCurSel++;
-      }
-    }
-    m_pOwner->m_iCurSel = iCurSel;
-    if (bDropDown && m_pOwner->m_pEdit) {
-      m_pOwner->SynchrEditText(m_pOwner->m_iCurSel);
-    } else {
-      m_pOwner->Repaint(&m_pOwner->m_rtClient);
-    }
-    return;
-  }
-  FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
-  if (bDropDown) {
-    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
-    pDelegate->OnProcessMessage(pMsg);
-  }
-}
-int32_t CFWL_ComboBoxImpDelegate::DisForm_OnProcessMessage(
-    CFWL_Message* pMessage) {
-  if (!pMessage)
-    return 0;
-  FX_DWORD dwMsgCode = pMessage->GetClassID();
-  FX_BOOL backDefault = TRUE;
-  switch (dwMsgCode) {
-    case FWL_MSGHASH_SetFocus:
-    case FWL_MSGHASH_KillFocus: {
-      backDefault = FALSE;
-      DisForm_OnFocusChanged(pMessage, dwMsgCode == FWL_MSGHASH_SetFocus);
-      break;
-    }
-    case FWL_MSGHASH_Mouse: {
-      backDefault = FALSE;
-      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
-      FX_DWORD dwCmd = pMsg->m_dwCmd;
-      switch (dwCmd) {
-        case FWL_MSGMOUSECMD_LButtonDown: {
-          DisForm_OnLButtonDown(pMsg);
-          break;
-        }
-        case FWL_MSGMOUSECMD_LButtonUp: {
-          OnLButtonUp(pMsg);
-          break;
-        }
-        default: {}
-      }
-      break;
-    }
-    case FWL_MSGHASH_Key: {
-      backDefault = FALSE;
-      CFWL_MsgKey* pKey = static_cast<CFWL_MsgKey*>(pMessage);
-      if (pKey->m_dwCmd == FWL_MSGKEYCMD_KeyUp) {
-        break;
-      }
-      if (m_pOwner->DisForm_IsDropListShowed() &&
-          pKey->m_dwCmd == FWL_MSGKEYCMD_KeyDown) {
-        FX_DWORD dwKeyCode = pKey->m_dwKeyCode;
-        FX_BOOL bListKey =
-            dwKeyCode == FWL_VKEY_Up || dwKeyCode == FWL_VKEY_Down ||
-            dwKeyCode == FWL_VKEY_Return || dwKeyCode == FWL_VKEY_Escape;
-        if (bListKey) {
-          IFWL_WidgetDelegate* pDelegate =
-              m_pOwner->m_pListBox->SetDelegate(NULL);
-          pDelegate->OnProcessMessage(pMessage);
-          break;
-        }
-      }
-      DisForm_OnKey(pKey);
-      break;
-    }
-    default: {}
-  }
-  if (!backDefault) {
-    return 1;
-  }
-  return CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
-}
-void CFWL_ComboBoxImpDelegate::DisForm_OnLButtonDown(CFWL_MsgMouse* pMsg) {
-  FX_BOOL bDropDown = m_pOwner->DisForm_IsDropListShowed();
-  CFX_RectF& rtBtn = bDropDown ? m_pOwner->m_rtBtn : m_pOwner->m_rtClient;
-  FX_BOOL bClickBtn = rtBtn.Contains(pMsg->m_fx, pMsg->m_fy);
-  if (bClickBtn) {
-    if (m_pOwner->DisForm_IsDropListShowed()) {
-      m_pOwner->DisForm_ShowDropList(FALSE);
-      return;
-    }
-    {
-      if (m_pOwner->m_pEdit) {
-        m_pOwner->MatchEditText();
-      }
-      m_pOwner->DisForm_ShowDropList(TRUE);
-    }
-  }
-}
-void CFWL_ComboBoxImpDelegate::DisForm_OnFocusChanged(CFWL_Message* pMsg,
-                                                      FX_BOOL bSet) {
-  if (bSet) {
-    m_pOwner->m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
-    if ((m_pOwner->m_pEdit->GetStates() & FWL_WGTSTATE_Focused) == 0) {
-      CFWL_MsgSetFocus msg;
-      msg.m_pDstTarget = m_pOwner->m_pEdit.get();
-      msg.m_pSrcTarget = NULL;
-      IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
-      pDelegate->OnProcessMessage(&msg);
-    }
-  } else {
-    m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
-    m_pOwner->DisForm_ShowDropList(FALSE);
-    CFWL_MsgKillFocus msg;
-    msg.m_pDstTarget = NULL;
-    msg.m_pSrcTarget = m_pOwner->m_pEdit.get();
-    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
-    pDelegate->OnProcessMessage(&msg);
-  }
-}
-void CFWL_ComboBoxImpDelegate::DisForm_OnKey(CFWL_MsgKey* pMsg) {
-  FX_DWORD dwKeyCode = pMsg->m_dwKeyCode;
-  FX_BOOL bUp = dwKeyCode == FWL_VKEY_Up;
-  FX_BOOL bDown = dwKeyCode == FWL_VKEY_Down;
-  if (bUp || bDown) {
-    CFWL_ComboListImp* pComboList =
-        static_cast<CFWL_ComboListImp*>(m_pOwner->m_pListBox->GetImpl());
-    int32_t iCount = pComboList->CountItems();
-    if (iCount < 1) {
-      return;
-    }
-    FX_BOOL bMatchEqual = FALSE;
-    int32_t iCurSel = m_pOwner->m_iCurSel;
-    if (m_pOwner->m_pEdit) {
-      CFX_WideString wsText;
-      m_pOwner->m_pEdit->GetText(wsText);
-      iCurSel = pComboList->MatchItem(wsText);
-      if (iCurSel >= 0) {
-        CFX_WideString wsTemp;
-        FWL_HLISTITEM item = m_pOwner->m_pListBox->GetSelItem(iCurSel);
-        m_pOwner->m_pListBox->GetItemText(item, wsTemp);
-        bMatchEqual = wsText.Equal(wsTemp);
-      }
-    }
-    if (iCurSel < 0) {
-      iCurSel = 0;
-    } else if (bMatchEqual) {
-      if ((bUp && iCurSel == 0) || (bDown && iCurSel == iCount - 1)) {
-        return;
-      }
-      if (bUp) {
-        iCurSel--;
-      } else {
-        iCurSel++;
-      }
-    }
-    m_pOwner->m_iCurSel = iCurSel;
-    m_pOwner->SynchrEditText(m_pOwner->m_iCurSel);
-    return;
-  }
-  if (m_pOwner->m_pEdit) {
-    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
-    pDelegate->OnProcessMessage(pMsg);
-  }
-}
-CFWL_ComboProxyImpDelegate::CFWL_ComboProxyImpDelegate(
-    IFWL_Form* pForm,
-    CFWL_ComboBoxImp* pComboBox)
-    : m_bLButtonDown(FALSE),
-      m_bLButtonUpSelf(FALSE),
-      m_fStartPos(0),
-      m_pForm(pForm),
-      m_pComboBox(pComboBox) {
-}
-int32_t CFWL_ComboProxyImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
-  if (!pMessage)
-    return 0;
-  FX_DWORD dwMsgCode = pMessage->GetClassID();
-  if (dwMsgCode == FWL_MSGHASH_Mouse) {
-    CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
-    FX_DWORD dwCmd = pMsg->m_dwCmd;
-    switch (dwCmd) {
-      case FWL_MSGMOUSECMD_LButtonDown: {
-        OnLButtonDown(pMsg);
-        break;
-      }
-      case FWL_MSGMOUSECMD_LButtonUp: {
-        OnLButtonUp(pMsg);
-        break;
-      }
-      case FWL_MSGMOUSECMD_MouseMove: {
-        OnMouseMove(pMsg);
-        break;
-      }
-      default: {}
-    }
-  }
-  if (dwMsgCode == FWL_MSGHASH_Deactivate) {
-    OnDeactive(static_cast<CFWL_MsgDeactivate*>(pMessage));
-  }
-  if (dwMsgCode == FWL_MSGHASH_KillFocus || dwMsgCode == FWL_MSGHASH_SetFocus) {
-    OnFocusChanged(static_cast<CFWL_MsgKillFocus*>(pMessage),
-                   dwMsgCode == FWL_MSGHASH_SetFocus);
-  }
-  return CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
-}
-FWL_ERR CFWL_ComboProxyImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
-                                                 const CFX_Matrix* pMatrix) {
-  m_pComboBox->DrawStretchHandler(pGraphics, pMatrix);
-  return FWL_ERR_Succeeded;
-}
-void CFWL_ComboProxyImpDelegate::OnLButtonDown(CFWL_MsgMouse* pMsg) {
-  IFWL_NoteThread* pThread = m_pForm->GetOwnerThread();
-  if (!pThread)
-    return;
-  CFWL_NoteDriver* pDriver =
-      static_cast<CFWL_NoteDriver*>(pThread->GetNoteDriver());
-  CFX_RectF rtWidget;
-  m_pForm->GetWidgetRect(rtWidget);
-  rtWidget.left = rtWidget.top = 0;
-  if (rtWidget.Contains(pMsg->m_fx, pMsg->m_fy)) {
-    m_bLButtonDown = TRUE;
-    pDriver->SetGrab(m_pForm, TRUE);
-  } else {
-    m_bLButtonDown = FALSE;
-    pDriver->SetGrab(m_pForm, FALSE);
-    m_pComboBox->ShowDropList(FALSE);
-    return;
-  }
-  IFWL_AdapterNative* pNative = FWL_GetAdapterNative();
-  IFWL_AdapterCursorMgr* pCursorMgr = pNative->GetCursorMgr();
-  FWL_HCURSOR hCursor = pCursorMgr->GetSystemCursor(FWL_CURSORTYPE_SizeNS);
-  pCursorMgr->SetCursor(hCursor);
-  pCursorMgr->ShowCursor(TRUE);
-  m_pForm->TransformTo(NULL, pMsg->m_fx, pMsg->m_fy);
-  m_fStartPos = pMsg->m_fy;
-}
-void CFWL_ComboProxyImpDelegate::OnLButtonUp(CFWL_MsgMouse* pMsg) {
-  m_bLButtonDown = FALSE;
-  IFWL_NoteThread* pThread = m_pForm->GetOwnerThread();
-  if (!pThread)
-    return;
-  CFWL_NoteDriver* pDriver =
-      static_cast<CFWL_NoteDriver*>(pThread->GetNoteDriver());
-  pDriver->SetGrab(m_pForm, FALSE);
-  if (m_bLButtonUpSelf) {
-    CFX_RectF rect;
-    m_pForm->GetWidgetRect(rect);
-    rect.left = rect.top = 0;
-    if (!rect.Contains(pMsg->m_fx, pMsg->m_fy) &&
-        m_pComboBox->IsDropListShowed()) {
-      m_pComboBox->ShowDropList(FALSE);
-    }
-  } else {
-    m_bLButtonUpSelf = TRUE;
-  }
-}
-void CFWL_ComboProxyImpDelegate::OnMouseMove(CFWL_MsgMouse* pMsg) {
-  IFWL_AdapterNative* pNative = FWL_GetAdapterNative();
-  IFWL_AdapterCursorMgr* pCursorMgr = pNative->GetCursorMgr();
-  FWL_CURSORTYPE cursorType = FWL_CURSORTYPE_Arrow;
-  if (m_pComboBox->m_rtHandler.Contains(pMsg->m_fx, pMsg->m_fy)) {
-    cursorType = FWL_CURSORTYPE_SizeNS;
-  }
-  FWL_HCURSOR hCursor = pCursorMgr->GetSystemCursor(cursorType);
-  pCursorMgr->SetCursor(hCursor);
-  pCursorMgr->ShowCursor(TRUE);
-  if (!m_bLButtonDown) {
-    return;
-  }
-  m_pForm->TransformTo(NULL, pMsg->m_fx, pMsg->m_fy);
-  FX_FLOAT fChanged = pMsg->m_fy - m_fStartPos;
-  if (m_pComboBox->m_bUpFormHandler) {
-    fChanged = m_fStartPos - pMsg->m_fy;
-  }
-  if (m_pComboBox->m_rtList.height + fChanged < m_pComboBox->m_fItemHeight) {
-    return;
-  }
-  m_pComboBox->m_rtList.height += fChanged;
-  m_pComboBox->m_rtProxy.height += fChanged;
-  if (m_pComboBox->m_bUpFormHandler) {
-    m_pComboBox->m_rtProxy.top -= fChanged;
-    m_pComboBox->m_rtHandler.Set(0, 0, m_pComboBox->m_rtList.width,
-                                 m_pComboBox->m_fComboFormHandler);
-  } else {
-    m_pComboBox->m_rtHandler.Set(0, m_pComboBox->m_rtList.height,
-                                 m_pComboBox->m_rtList.width,
-                                 m_pComboBox->m_fComboFormHandler);
-  }
-  m_pForm->SetWidgetRect(m_pComboBox->m_rtProxy);
-  m_pComboBox->m_pListBox->SetWidgetRect(m_pComboBox->m_rtList);
-  m_pComboBox->m_pListBox->Update();
-  m_fStartPos = pMsg->m_fy;
-}
-void CFWL_ComboProxyImpDelegate::OnDeactive(CFWL_MsgDeactivate* pMsg) {
-  m_pComboBox->ShowDropList(FALSE);
-}
-void CFWL_ComboProxyImpDelegate::OnFocusChanged(CFWL_MsgKillFocus* pMsg,
-                                                FX_BOOL bSet) {
-  if (!bSet) {
-    if (pMsg->m_pSetFocus == NULL) {
-      m_pComboBox->ShowDropList(FALSE);
-    }
-  }
-}
+// 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/src/foxitlib.h"
+#include "xfa/src/fwl/src/core/include/fwl_threadimp.h"
+#include "xfa/src/fwl/src/core/include/fwl_appimp.h"
+#include "xfa/src/fwl/src/core/include/fwl_targetimp.h"
+#include "xfa/src/fwl/src/core/include/fwl_noteimp.h"
+#include "xfa/src/fwl/src/core/include/fwl_widgetimp.h"
+#include "xfa/src/fwl/src/core/include/fwl_panelimp.h"
+#include "xfa/src/fwl/src/core/include/fwl_formimp.h"
+#include "xfa/src/fwl/src/core/include/fwl_widgetmgrimp.h"
+#include "xfa/src/fwl/src/basewidget/include/fwl_scrollbarimp.h"
+#include "xfa/src/fwl/src/basewidget/include/fwl_editimp.h"
+#include "xfa/src/fwl/src/basewidget/include/fwl_listboximp.h"
+#include "xfa/src/fwl/src/basewidget/include/fwl_formproxyimp.h"
+#include "xfa/src/fwl/src/basewidget/include/fwl_comboboximp.h"
+
+// static
+IFWL_ComboBox* IFWL_ComboBox::Create(
+    const CFWL_WidgetImpProperties& properties) {
+  IFWL_ComboBox* pComboBox = new IFWL_ComboBox;
+  CFWL_ComboBoxImp* pComboBoxImpl = new CFWL_ComboBoxImp(properties, nullptr);
+  pComboBox->SetImpl(pComboBoxImpl);
+  pComboBoxImpl->SetInterface(pComboBox);
+  return pComboBox;
+}
+IFWL_ComboBox::IFWL_ComboBox() {}
+int32_t IFWL_ComboBox::GetCurSel() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetCurSel();
+}
+FWL_ERR IFWL_ComboBox::SetCurSel(int32_t iSel) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->SetCurSel(iSel);
+}
+FWL_ERR IFWL_ComboBox::SetEditText(const CFX_WideString& wsText) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->SetEditText(wsText);
+}
+int32_t IFWL_ComboBox::GetEditTextLength() const {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetEditTextLength();
+}
+FWL_ERR IFWL_ComboBox::GetEditText(CFX_WideString& wsText,
+                                   int32_t nStart,
+                                   int32_t nCount) const {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())
+      ->GetEditText(wsText, nStart, nCount);
+}
+FWL_ERR IFWL_ComboBox::SetEditSelRange(int32_t nStart, int32_t nCount) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())
+      ->SetEditSelRange(nStart, nCount);
+}
+int32_t IFWL_ComboBox::GetEditSelRange(int32_t nIndex, int32_t& nStart) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())
+      ->GetEditSelRange(nIndex, nStart);
+}
+int32_t IFWL_ComboBox::GetEditLimit() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetEditLimit();
+}
+FWL_ERR IFWL_ComboBox::SetEditLimit(int32_t nLimit) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->SetEditLimit(nLimit);
+}
+FWL_ERR IFWL_ComboBox::EditDoClipboard(int32_t iCmd) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditDoClipboard(iCmd);
+}
+FX_BOOL IFWL_ComboBox::EditRedo(const CFX_ByteStringC& bsRecord) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditRedo(bsRecord);
+}
+FX_BOOL IFWL_ComboBox::EditUndo(const CFX_ByteStringC& bsRecord) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditUndo(bsRecord);
+}
+IFWL_ListBox* IFWL_ComboBox::GetListBoxt() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetListBoxt();
+}
+FX_BOOL IFWL_ComboBox::AfterFocusShowDropList() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->AfterFocusShowDropList();
+}
+FX_ERR IFWL_ComboBox::OpenDropDownList(FX_BOOL bActivate) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->OpenDropDownList(bActivate);
+}
+FX_BOOL IFWL_ComboBox::EditCanUndo() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanUndo();
+}
+FX_BOOL IFWL_ComboBox::EditCanRedo() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanRedo();
+}
+FX_BOOL IFWL_ComboBox::EditUndo() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditUndo();
+}
+FX_BOOL IFWL_ComboBox::EditRedo() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditRedo();
+}
+FX_BOOL IFWL_ComboBox::EditCanCopy() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanCopy();
+}
+FX_BOOL IFWL_ComboBox::EditCanCut() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanCut();
+}
+FX_BOOL IFWL_ComboBox::EditCanSelectAll() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCanSelectAll();
+}
+FX_BOOL IFWL_ComboBox::EditCopy(CFX_WideString& wsCopy) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCopy(wsCopy);
+}
+FX_BOOL IFWL_ComboBox::EditCut(CFX_WideString& wsCut) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditCut(wsCut);
+}
+FX_BOOL IFWL_ComboBox::EditPaste(const CFX_WideString& wsPaste) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditPaste(wsPaste);
+}
+FX_BOOL IFWL_ComboBox::EditSelectAll() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditSelectAll();
+}
+FX_BOOL IFWL_ComboBox::EditDelete() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditDelete();
+}
+FX_BOOL IFWL_ComboBox::EditDeSelect() {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->EditDeSelect();
+}
+FWL_ERR IFWL_ComboBox::GetBBox(CFX_RectF& rect) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())->GetBBox(rect);
+}
+FWL_ERR IFWL_ComboBox::EditModifyStylesEx(FX_DWORD dwStylesExAdded,
+                                          FX_DWORD dwStylesExRemoved) {
+  return static_cast<CFWL_ComboBoxImp*>(GetImpl())
+      ->EditModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+}
+
+CFWL_ComboEditImp::CFWL_ComboEditImp(const CFWL_WidgetImpProperties& properties,
+                                     IFWL_Widget* pOuter)
+    : CFWL_EditImp(properties, pOuter) {
+  m_pOuter = static_cast<CFWL_ComboBoxImp*>(pOuter->GetImpl());
+}
+
+CFWL_ComboEditImpDelegate::CFWL_ComboEditImpDelegate(CFWL_ComboEditImp* pOwner)
+    : CFWL_EditImpDelegate(pOwner), m_pOwner(pOwner) {
+}
+int32_t CFWL_ComboEditImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
+  if (!pMessage)
+    return 0;
+  FX_DWORD dwMsgCode = pMessage->GetClassID();
+  FX_BOOL backDefault = TRUE;
+  switch (dwMsgCode) {
+    case FWL_MSGHASH_SetFocus:
+    case FWL_MSGHASH_KillFocus: {
+      if (dwMsgCode == FWL_MSGHASH_SetFocus) {
+        m_pOwner->m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
+      } else {
+        m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
+      }
+      backDefault = FALSE;
+      break;
+    }
+    case FWL_MSGHASH_Mouse: {
+      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
+      if ((pMsg->m_dwCmd == FWL_MSGMOUSECMD_LButtonDown) &&
+          ((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)) {
+        m_pOwner->SetSelected();
+        m_pOwner->SetComboBoxFocus(TRUE);
+      }
+      break;
+    }
+    default: {}
+  }
+  if (!backDefault) {
+    return 1;
+  }
+  return CFWL_EditImpDelegate::OnProcessMessage(pMessage);
+}
+void CFWL_ComboEditImp::ClearSelected() {
+  ClearSelections();
+  Repaint(&m_rtClient);
+}
+void CFWL_ComboEditImp::SetSelected() {
+  FlagFocus(TRUE);
+  EndCaret();
+  AddSelRange(0);
+}
+void CFWL_ComboEditImp::EndCaret() {
+  m_pEdtEngine->MoveCaretPos(MC_End);
+}
+void CFWL_ComboEditImp::FlagFocus(FX_BOOL bSet) {
+  if (bSet) {
+    m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
+  } else {
+    m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
+    ShowCaret(FALSE);
+  }
+};
+void CFWL_ComboEditImp::SetComboBoxFocus(FX_BOOL bSet) {
+  m_pOuter->SetFocus(bSet);
+}
+CFWL_ComboListImp::CFWL_ComboListImp(const CFWL_WidgetImpProperties& properties,
+                                     IFWL_Widget* pOuter)
+    : CFWL_ListBoxImp(properties, pOuter), m_bNotifyOwner(TRUE) {
+  FXSYS_assert(pOuter != NULL);
+}
+FWL_ERR CFWL_ComboListImp::Initialize() {
+  if (CFWL_ListBoxImp::Initialize() != FWL_ERR_Succeeded)
+    return FWL_ERR_Indefinite;
+  delete m_pDelegate;
+  m_pDelegate = new CFWL_ComboListImpDelegate(this);
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboListImp::Finalize() {
+  delete m_pDelegate;
+  m_pDelegate = nullptr;
+  return CFWL_ListBoxImp::Finalize();
+}
+int32_t CFWL_ComboListImp::MatchItem(const CFX_WideString& wsMatch) {
+  if (wsMatch.IsEmpty()) {
+    return -1;
+  }
+  if (!m_pProperties->m_pDataProvider)
+    return -1;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t iCount = pData->CountItems(m_pInterface);
+  for (int32_t i = 0; i < iCount; i++) {
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+    CFX_WideString wsText;
+    pData->GetItemText(m_pInterface, hItem, wsText);
+    FX_STRSIZE pos = wsText.Find(wsMatch.c_str());
+    if (!pos) {
+      return i;
+    }
+  }
+  return -1;
+}
+void CFWL_ComboListImp::ChangeSelected(int32_t iSel) {
+  if (!m_pProperties->m_pDataProvider)
+    return;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iSel);
+  CFX_RectF rtInvalidate;
+  rtInvalidate.Reset();
+  FWL_HLISTITEM hOld = GetSelItem(0);
+  int32_t iOld = pData->GetItemIndex(m_pInterface, hOld);
+  if (iOld == iSel) {
+    return;
+  } else if (iOld > -1) {
+    GetItemRect(iOld, rtInvalidate);
+    SetSelItem(hOld, FALSE);
+  }
+  if (hItem) {
+    CFX_RectF rect;
+    GetItemRect(iSel, rect);
+    rtInvalidate.Union(rect);
+    FWL_HLISTITEM hSel = pData->GetItem(m_pInterface, iSel);
+    SetSelItem(hSel, TRUE);
+  }
+  if (!rtInvalidate.IsEmpty()) {
+    Repaint(&rtInvalidate);
+  }
+}
+int32_t CFWL_ComboListImp::CountItems() {
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  return pData ? pData->CountItems(m_pInterface) : 0;
+}
+void CFWL_ComboListImp::GetItemRect(int32_t nIndex, CFX_RectF& rtItem) {
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, nIndex);
+  pData->GetItemRect(m_pInterface, hItem, rtItem);
+}
+void CFWL_ComboListImp::ClientToOuter(FX_FLOAT& fx, FX_FLOAT& fy) {
+  fx += m_pProperties->m_rtWidget.left, fy += m_pProperties->m_rtWidget.top;
+  IFWL_Widget* pOwner = GetOwner();
+  if (!pOwner)
+    return;
+  pOwner->TransformTo(m_pOuter, fx, fy);
+}
+void CFWL_ComboListImp::SetFocus(FX_BOOL bSet) {
+  CFWL_WidgetImp::SetFocus(bSet);
+}
+CFWL_ComboListImpDelegate::CFWL_ComboListImpDelegate(CFWL_ComboListImp* pOwner)
+    : CFWL_ListBoxImpDelegate(pOwner), m_pOwner(pOwner) {
+}
+int32_t CFWL_ComboListImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
+  if (!pMessage)
+    return 0;
+  FX_DWORD dwHashCode = pMessage->GetClassID();
+  FX_BOOL backDefault = TRUE;
+  if (dwHashCode == FWL_MSGHASH_SetFocus ||
+      dwHashCode == FWL_MSGHASH_KillFocus) {
+    OnDropListFocusChanged(pMessage, dwHashCode == FWL_MSGHASH_SetFocus);
+  } else if (dwHashCode == FWL_MSGHASH_Mouse) {
+    CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
+    if (m_pOwner->IsShowScrollBar(TRUE) && m_pOwner->m_pVertScrollBar) {
+      CFX_RectF rect;
+      m_pOwner->m_pVertScrollBar->GetWidgetRect(rect);
+      if (rect.Contains(pMsg->m_fx, pMsg->m_fy)) {
+        pMsg->m_fx -= rect.left;
+        pMsg->m_fy -= rect.top;
+        IFWL_WidgetDelegate* pDelegate =
+            m_pOwner->m_pVertScrollBar->SetDelegate(NULL);
+        return pDelegate->OnProcessMessage(pMsg);
+      }
+    }
+    FX_DWORD dwCmd = pMsg->m_dwCmd;
+    switch (dwCmd) {
+      case FWL_MSGMOUSECMD_MouseMove: {
+        backDefault = FALSE;
+        OnDropListMouseMove(pMsg);
+        break;
+      }
+      case FWL_MSGMOUSECMD_LButtonDown: {
+        backDefault = FALSE;
+        OnDropListLButtonDown(pMsg);
+        break;
+      }
+      case FWL_MSGMOUSECMD_LButtonUp: {
+        backDefault = FALSE;
+        OnDropListLButtonUp(pMsg);
+        break;
+      }
+      default: {}
+    }
+  } else if (dwHashCode == FWL_MSGHASH_Key) {
+    backDefault = !OnDropListKey(static_cast<CFWL_MsgKey*>(pMessage));
+  }
+  if (!backDefault) {
+    return 1;
+  }
+  return CFWL_ListBoxImpDelegate::OnProcessMessage(pMessage);
+}
+void CFWL_ComboListImpDelegate::OnDropListFocusChanged(CFWL_Message* pMsg,
+                                                       FX_BOOL bSet) {
+  if (!bSet) {
+    CFWL_MsgKillFocus* pKill = static_cast<CFWL_MsgKillFocus*>(pMsg);
+    CFWL_ComboBoxImp* pOuter =
+        static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
+    if (pKill->m_pSetFocus == m_pOwner->m_pOuter ||
+        pKill->m_pSetFocus == pOuter->m_pEdit.get()) {
+      pOuter->ShowDropList(FALSE);
+    }
+  }
+}
+int32_t CFWL_ComboListImpDelegate::OnDropListMouseMove(CFWL_MsgMouse* pMsg) {
+  if (m_pOwner->m_rtClient.Contains(pMsg->m_fx, pMsg->m_fy)) {
+    if (m_pOwner->m_bNotifyOwner) {
+      m_pOwner->m_bNotifyOwner = FALSE;
+    }
+    if (m_pOwner->IsShowScrollBar(TRUE) && m_pOwner->m_pVertScrollBar) {
+      CFX_RectF rect;
+      m_pOwner->m_pVertScrollBar->GetWidgetRect(rect);
+      if (rect.Contains(pMsg->m_fx, pMsg->m_fy)) {
+        return 1;
+      }
+    }
+    FWL_HLISTITEM hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
+    if (hItem) {
+      if (!m_pOwner->m_pProperties->m_pDataProvider)
+        return 0;
+      IFWL_ListBoxDP* pData = static_cast<IFWL_ListBoxDP*>(
+          m_pOwner->m_pProperties->m_pDataProvider);
+      int32_t iSel = pData->GetItemIndex(m_pOwner->m_pInterface, hItem);
+      CFWL_EvtCmbHoverChanged event;
+      event.m_pSrcTarget = m_pOwner->m_pOuter;
+      event.m_iCurHover = iSel;
+      m_pOwner->DispatchEvent(&event);
+      m_pOwner->ChangeSelected(iSel);
+    }
+  } else if (m_pOwner->m_bNotifyOwner) {
+    m_pOwner->ClientToOuter(pMsg->m_fx, pMsg->m_fy);
+    CFWL_ComboBoxImp* pOuter =
+        static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
+    pOuter->m_pDelegate->OnProcessMessage(pMsg);
+  }
+  return 1;
+}
+int32_t CFWL_ComboListImpDelegate::OnDropListLButtonDown(CFWL_MsgMouse* pMsg) {
+  if (m_pOwner->m_rtClient.Contains(pMsg->m_fx, pMsg->m_fy)) {
+    return 0;
+  }
+  CFWL_ComboBoxImp* pOuter =
+      static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
+  pOuter->ShowDropList(FALSE);
+  return 1;
+}
+int32_t CFWL_ComboListImpDelegate::OnDropListLButtonUp(CFWL_MsgMouse* pMsg) {
+  CFWL_ComboBoxImp* pOuter =
+      static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
+  if (m_pOwner->m_bNotifyOwner) {
+    m_pOwner->ClientToOuter(pMsg->m_fx, pMsg->m_fy);
+    pOuter->m_pDelegate->OnProcessMessage(pMsg);
+  } else {
+    if (m_pOwner->IsShowScrollBar(TRUE) && m_pOwner->m_pVertScrollBar) {
+      CFX_RectF rect;
+      m_pOwner->m_pVertScrollBar->GetWidgetRect(rect);
+      if (rect.Contains(pMsg->m_fx, pMsg->m_fy)) {
+        return 1;
+      }
+    }
+    pOuter->ShowDropList(FALSE);
+    FWL_HLISTITEM hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
+    if (hItem) {
+      pOuter->ProcessSelChanged(TRUE);
+    }
+  }
+  return 1;
+}
+int32_t CFWL_ComboListImpDelegate::OnDropListKey(CFWL_MsgKey* pKey) {
+  CFWL_ComboBoxImp* pOuter =
+      static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
+  FX_BOOL bPropagate = FALSE;
+  if (pKey->m_dwCmd == FWL_MSGKEYCMD_KeyDown) {
+    FX_DWORD dwKeyCode = pKey->m_dwKeyCode;
+    switch (dwKeyCode) {
+      case FWL_VKEY_Return:
+      case FWL_VKEY_Escape: {
+        pOuter->ShowDropList(FALSE);
+        return 1;
+      }
+      case FWL_VKEY_Up:
+      case FWL_VKEY_Down: {
+        OnDropListKeyDown(pKey);
+        pOuter->SetDelegate(nullptr);
+        pOuter->ProcessSelChanged(FALSE);
+        return 1;
+      }
+      default: { bPropagate = TRUE; }
+    }
+  } else if (pKey->m_dwCmd == FWL_MSGKEYCMD_Char) {
+    bPropagate = TRUE;
+  }
+  if (bPropagate) {
+    pKey->m_pDstTarget = m_pOwner->m_pOuter;
+    pOuter->m_pDelegate->OnProcessMessage(pKey);
+    return 1;
+  }
+  return 0;
+}
+void CFWL_ComboListImpDelegate::OnDropListKeyDown(CFWL_MsgKey* pKey) {
+  FX_DWORD dwKeyCode = pKey->m_dwKeyCode;
+  switch (dwKeyCode) {
+    case FWL_VKEY_Up:
+    case FWL_VKEY_Down:
+    case FWL_VKEY_Home:
+    case FWL_VKEY_End: {
+      CFWL_ComboBoxImp* pOuter =
+          static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
+      IFWL_ListBoxDP* pData = static_cast<IFWL_ListBoxDP*>(
+          m_pOwner->m_pProperties->m_pDataProvider);
+      FWL_HLISTITEM hItem =
+          pData->GetItem(m_pOwner->m_pInterface, pOuter->m_iCurSel);
+      hItem = m_pOwner->GetItem(hItem, dwKeyCode);
+      if (!hItem) {
+        break;
+      }
+      m_pOwner->SetSelection(hItem, hItem, TRUE);
+      m_pOwner->ScrollToVisible(hItem);
+      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);
+      break;
+    }
+    default: {}
+  }
+}
+CFWL_ComboBoxImp::CFWL_ComboBoxImp(const CFWL_WidgetImpProperties& properties,
+                                   IFWL_Widget* pOuter)
+    : CFWL_WidgetImp(properties, pOuter),
+      m_pForm(NULL),
+      m_bLButtonDown(FALSE),
+      m_iCurSel(-1),
+      m_iBtnState(FWL_PARTSTATE_CMB_Normal),
+      m_fComboFormHandler(0),
+      m_bNeedShowList(FALSE) {
+  m_rtClient.Reset();
+  m_rtBtn.Reset();
+  m_rtHandler.Reset();
+}
+CFWL_ComboBoxImp::~CFWL_ComboBoxImp() {
+}
+FWL_ERR CFWL_ComboBoxImp::GetClassName(CFX_WideString& wsClass) const {
+  wsClass = FWL_CLASS_ComboBox;
+  return FWL_ERR_Succeeded;
+}
+FX_DWORD CFWL_ComboBoxImp::GetClassID() const {
+  return FWL_CLASSHASH_ComboBox;
+}
+FWL_ERR CFWL_ComboBoxImp::Initialize() {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_Initialize();
+  }
+  if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
+    return FWL_WGTSTATE_Invisible;  // Probably a bug; not a FWL_ERR_ value.
+  m_pDelegate = new CFWL_ComboBoxImpDelegate(this);
+  CFWL_WidgetImpProperties prop;
+  prop.m_pThemeProvider = m_pProperties->m_pThemeProvider;
+  prop.m_dwStyles |= FWL_WGTSTYLE_Border | FWL_WGTSTYLE_VScroll;
+  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListItemIconText) {
+    prop.m_dwStyleExes |= FWL_STYLEEXT_LTB_Icon;
+  }
+  prop.m_pDataProvider = m_pProperties->m_pDataProvider;
+  m_pListBox.reset(IFWL_ListBox::CreateComboList(prop, m_pInterface));
+  m_pListBox->Initialize();
+  if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_DropDown) && !m_pEdit) {
+    CFWL_WidgetImpProperties prop2;
+    m_pEdit.reset(IFWL_Edit::CreateComboEdit(prop2, m_pInterface));
+    m_pEdit->Initialize();
+    static_cast<CFWL_EditImp*>(m_pEdit->GetImpl())->SetOuter(m_pInterface);
+  }
+  if (m_pEdit) {
+    m_pEdit->SetParent(m_pInterface);
+  }
+  SetStates(m_pProperties->m_dwStates);
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboBoxImp::Finalize() {
+  if (m_pEdit) {
+    m_pEdit->Finalize();
+  }
+  m_pListBox->Finalize();
+  delete m_pDelegate;
+  m_pDelegate = nullptr;
+  return CFWL_WidgetImp::Finalize();
+}
+FWL_ERR CFWL_ComboBoxImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
+  if (bAutoSize) {
+    rect.Reset();
+    FX_BOOL bIsDropDown = IsDropDownStyle();
+    if (bIsDropDown && m_pEdit) {
+      m_pEdit->GetWidgetRect(rect, TRUE);
+    } else {
+      rect.width = 100;
+      rect.height = 16;
+    }
+    if (!m_pProperties->m_pThemeProvider) {
+      ReSetTheme();
+    }
+    FX_FLOAT* pFWidth = static_cast<FX_FLOAT*>(
+        GetThemeCapacity(FWL_WGTCAPACITY_ScrollBarWidth));
+    if (!pFWidth)
+      return FWL_ERR_Indefinite;
+    rect.Inflate(0, 0, *pFWidth, 0);
+    CFWL_WidgetImp::GetWidgetRect(rect, TRUE);
+  } else {
+    rect = m_pProperties->m_rtWidget;
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboBoxImp::ModifyStylesEx(FX_DWORD dwStylesExAdded,
+                                         FX_DWORD dwStylesExRemoved) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+  }
+  FX_BOOL bAddDropDown = dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown;
+  FX_BOOL bRemoveDropDown = dwStylesExRemoved & FWL_STYLEEXT_CMB_DropDown;
+  if (bAddDropDown && !m_pEdit) {
+    CFWL_WidgetImpProperties prop;
+    m_pEdit.reset(IFWL_Edit::CreateComboEdit(prop, nullptr));
+    m_pEdit->Initialize();
+    static_cast<CFWL_EditImp*>(m_pEdit->GetImpl())->SetOuter(m_pInterface);
+    m_pEdit->SetParent(m_pInterface);
+  } else if (bRemoveDropDown && m_pEdit) {
+    m_pEdit->SetStates(FWL_WGTSTATE_Invisible, TRUE);
+  }
+  return CFWL_WidgetImp::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+}
+FWL_ERR CFWL_ComboBoxImp::Update() {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_Update();
+  }
+  if (IsLocked()) {
+    return FWL_ERR_Indefinite;
+  }
+  ReSetTheme();
+  FX_BOOL bDropDown = IsDropDownStyle();
+  if (bDropDown && m_pEdit) {
+    ReSetEditAlignment();
+  }
+  if (m_pProperties->m_pThemeProvider == NULL) {
+    m_pProperties->m_pThemeProvider = GetAvailableTheme();
+  }
+  Layout();
+  CFWL_ThemePart part;
+  part.m_pWidget = m_pInterface;
+  m_fComboFormHandler =
+      *static_cast<FX_FLOAT*>(m_pProperties->m_pThemeProvider->GetCapacity(
+          &part, FWL_WGTCAPACITY_CMB_ComboFormHandler));
+  return FWL_ERR_Succeeded;
+}
+FX_DWORD CFWL_ComboBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_HitTest(fx, fy);
+  }
+  return CFWL_WidgetImp::HitTest(fx, fy);
+}
+FWL_ERR CFWL_ComboBoxImp::DrawWidget(CFX_Graphics* pGraphics,
+                                     const CFX_Matrix* pMatrix) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_DrawWidget(pGraphics, pMatrix);
+  }
+  if (!pGraphics)
+    return FWL_ERR_Indefinite;
+  if (!m_pProperties->m_pThemeProvider)
+    return FWL_ERR_Indefinite;
+  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
+  FX_BOOL bIsDropDown = IsDropDownStyle();
+  if (HasBorder()) {
+    DrawBorder(pGraphics, FWL_PART_CMB_Border, pTheme, pMatrix);
+  }
+  if (HasEdge()) {
+    DrawEdge(pGraphics, FWL_PART_CMB_Edge, pTheme, pMatrix);
+  }
+  if (!bIsDropDown) {
+    CFX_RectF rtTextBk(m_rtClient);
+    rtTextBk.width -= m_rtBtn.width;
+    CFWL_ThemeBackground param;
+    param.m_pWidget = m_pInterface;
+    param.m_iPart = FWL_PART_CMB_Background;
+    param.m_pGraphics = pGraphics;
+    if (pMatrix) {
+      param.m_matrix.Concat(*pMatrix);
+    }
+    param.m_rtPart = rtTextBk;
+    if (m_iCurSel >= 0) {
+      IFWL_ListBoxDP* pData = static_cast<IFWL_ListBoxDP*>(
+          static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
+              ->m_pProperties->m_pDataProvider);
+      void* p = pData->GetItemData(m_pListBox.get(),
+                                   pData->GetItem(m_pListBox.get(), m_iCurSel));
+      if (p != NULL) {
+        param.m_pData = p;
+      }
+    }
+    if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
+      param.m_dwStates = FWL_PARTSTATE_CMB_Disabled;
+    } else if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) &&
+               (m_iCurSel >= 0)) {
+      param.m_dwStates = FWL_PARTSTATE_CMB_Selected;
+    } else {
+      param.m_dwStates = FWL_PARTSTATE_CMB_Normal;
+    }
+    pTheme->DrawBackground(&param);
+    if (m_iCurSel >= 0) {
+      if (!m_pListBox)
+        return FWL_ERR_Indefinite;
+      CFX_WideString wsText;
+      IFWL_ComboBoxDP* pData =
+          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
+          ->GetItemText(hItem, wsText);
+      CFWL_ThemeText param;
+      param.m_pWidget = m_pInterface;
+      param.m_iPart = FWL_PART_CMB_Caption;
+      param.m_dwStates = m_iBtnState;
+      param.m_pGraphics = pGraphics;
+      param.m_matrix.Concat(*pMatrix);
+      param.m_rtPart = rtTextBk;
+      param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)
+                             ? FWL_PARTSTATE_CMB_Selected
+                             : FWL_PARTSTATE_CMB_Normal;
+      param.m_wsText = wsText;
+      param.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
+      param.m_iTTOAlign = FDE_TTOALIGNMENT_CenterLeft;
+      pTheme->DrawText(&param);
+    }
+  }
+  {
+    CFWL_ThemeBackground param;
+    param.m_pWidget = m_pInterface;
+    param.m_iPart = FWL_PART_CMB_DropDownButton;
+    param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
+                           ? FWL_PARTSTATE_CMB_Disabled
+                           : m_iBtnState;
+    param.m_pGraphics = pGraphics;
+    param.m_matrix.Concat(*pMatrix);
+    param.m_rtPart = m_rtBtn;
+    pTheme->DrawBackground(&param);
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboBoxImp::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
+  if (!pThemeProvider)
+    return FWL_ERR_Indefinite;
+  m_pProperties->m_pThemeProvider = pThemeProvider;
+  if (m_pListBox && pThemeProvider->IsValidWidget(m_pListBox.get())) {
+    m_pListBox->SetThemeProvider(pThemeProvider);
+  }
+  if (m_pEdit && pThemeProvider->IsValidWidget(m_pEdit.get())) {
+    m_pEdit->SetThemeProvider(pThemeProvider);
+  }
+  return FWL_ERR_Succeeded;
+}
+int32_t CFWL_ComboBoxImp::GetCurSel() {
+  return m_iCurSel;
+}
+FWL_ERR CFWL_ComboBoxImp::SetCurSel(int32_t iSel) {
+  int32_t iCount =
+      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->CountItems();
+  FX_BOOL bClearSel = iSel < 0 || iSel >= iCount;
+  FX_BOOL bDropDown = IsDropDownStyle();
+  if (bDropDown && m_pEdit) {
+    if (bClearSel) {
+      m_pEdit->SetText(CFX_WideString());
+    } else {
+      CFX_WideString wsText;
+      IFWL_ComboBoxDP* pData =
+          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iSel);
+      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
+          ->GetItemText(hItem, wsText);
+      m_pEdit->SetText(wsText);
+    }
+    m_pEdit->Update();
+  }
+  m_iCurSel = bClearSel ? -1 : iSel;
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboBoxImp::SetStates(FX_DWORD dwStates, FX_BOOL bSet) {
+  FX_BOOL bIsDropDown = IsDropDownStyle();
+  if (bIsDropDown && m_pEdit) {
+    m_pEdit->SetStates(dwStates, bSet);
+  }
+  if (m_pListBox) {
+    m_pListBox->SetStates(dwStates, bSet);
+  }
+  return CFWL_WidgetImp::SetStates(dwStates, bSet);
+}
+FWL_ERR CFWL_ComboBoxImp::SetEditText(const CFX_WideString& wsText) {
+  if (!m_pEdit)
+    return FWL_ERR_Indefinite;
+  m_pEdit->SetText(wsText);
+  return m_pEdit->Update();
+}
+int32_t CFWL_ComboBoxImp::GetEditTextLength() const {
+  if (!m_pEdit)
+    return -1;
+  return m_pEdit->GetTextLength();
+}
+FWL_ERR CFWL_ComboBoxImp::GetEditText(CFX_WideString& wsText,
+                                      int32_t nStart,
+                                      int32_t nCount) const {
+  if (m_pEdit) {
+    return m_pEdit->GetText(wsText, nStart, nCount);
+  } else if (m_pListBox) {
+    IFWL_ComboBoxDP* pData =
+        static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+    return m_pListBox->GetItemText(hItem, wsText);
+  }
+  return FWL_ERR_Indefinite;
+}
+FWL_ERR CFWL_ComboBoxImp::SetEditSelRange(int32_t nStart, int32_t nCount) {
+  if (!m_pEdit)
+    return FWL_ERR_Indefinite;
+  static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->ClearSelected();
+  m_pEdit->AddSelRange(nStart, nCount);
+  return FWL_ERR_Succeeded;
+}
+int32_t CFWL_ComboBoxImp::GetEditSelRange(int32_t nIndex, int32_t& nStart) {
+  if (!m_pEdit)
+    return -1;
+  return m_pEdit->GetSelRange(nIndex, nStart);
+}
+int32_t CFWL_ComboBoxImp::GetEditLimit() {
+  if (!m_pEdit)
+    return -1;
+  return m_pEdit->GetLimit();
+}
+FWL_ERR CFWL_ComboBoxImp::SetEditLimit(int32_t nLimit) {
+  if (!m_pEdit)
+    return FWL_ERR_Indefinite;
+  return m_pEdit->SetLimit(nLimit);
+}
+FWL_ERR CFWL_ComboBoxImp::EditDoClipboard(int32_t iCmd) {
+  if (!m_pEdit)
+    return FWL_ERR_Indefinite;
+  return m_pEdit->DoClipboard(iCmd);
+}
+FX_BOOL CFWL_ComboBoxImp::EditRedo(const CFX_ByteStringC& bsRecord) {
+  if (!m_pEdit)
+    return FALSE;
+  return m_pEdit->Redo(bsRecord);
+}
+FX_BOOL CFWL_ComboBoxImp::EditUndo(const CFX_ByteStringC& bsRecord) {
+  if (!m_pEdit)
+    return FALSE;
+  return m_pEdit->Undo(bsRecord);
+}
+IFWL_ListBox* CFWL_ComboBoxImp::GetListBoxt() {
+  return m_pListBox.get();
+}
+FX_BOOL CFWL_ComboBoxImp::AfterFocusShowDropList() {
+  if (!m_bNeedShowList) {
+    return FALSE;
+  }
+  if (m_pEdit) {
+    MatchEditText();
+  }
+  ShowDropList(TRUE);
+  m_bNeedShowList = FALSE;
+  return TRUE;
+}
+FX_ERR CFWL_ComboBoxImp::OpenDropDownList(FX_BOOL bActivate) {
+  ShowDropList(bActivate);
+  return FWL_ERR_Succeeded;
+}
+FX_BOOL CFWL_ComboBoxImp::EditCanUndo() {
+  return m_pEdit->CanUndo();
+}
+FX_BOOL CFWL_ComboBoxImp::EditCanRedo() {
+  return m_pEdit->CanRedo();
+}
+FX_BOOL CFWL_ComboBoxImp::EditUndo() {
+  return m_pEdit->Undo();
+}
+FX_BOOL CFWL_ComboBoxImp::EditRedo() {
+  return m_pEdit->Redo();
+}
+FX_BOOL CFWL_ComboBoxImp::EditCanCopy() {
+  return m_pEdit->CountSelRanges() > 0;
+}
+FX_BOOL CFWL_ComboBoxImp::EditCanCut() {
+  if (m_pEdit->GetStylesEx() & FWL_STYLEEXT_EDT_ReadOnly) {
+    return FALSE;
+  }
+  return m_pEdit->CountSelRanges() > 0;
+}
+FX_BOOL CFWL_ComboBoxImp::EditCanSelectAll() {
+  return m_pEdit->GetTextLength() > 0;
+}
+FX_BOOL CFWL_ComboBoxImp::EditCopy(CFX_WideString& wsCopy) {
+  return m_pEdit->Copy(wsCopy);
+}
+FX_BOOL CFWL_ComboBoxImp::EditCut(CFX_WideString& wsCut) {
+  return m_pEdit->Cut(wsCut);
+}
+FX_BOOL CFWL_ComboBoxImp::EditPaste(const CFX_WideString& wsPaste) {
+  return m_pEdit->Paste(wsPaste);
+}
+FX_BOOL CFWL_ComboBoxImp::EditSelectAll() {
+  return m_pEdit->AddSelRange(0) == FWL_ERR_Succeeded;
+}
+FX_BOOL CFWL_ComboBoxImp::EditDelete() {
+  return m_pEdit->ClearText() == FWL_ERR_Succeeded;
+}
+FX_BOOL CFWL_ComboBoxImp::EditDeSelect() {
+  return m_pEdit->ClearSelections() == FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboBoxImp::GetBBox(CFX_RectF& rect) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_GetBBox(rect);
+  }
+  rect = m_pProperties->m_rtWidget;
+  if (m_pListBox && IsDropListShowed()) {
+    CFX_RectF rtList;
+    m_pListBox->GetWidgetRect(rtList);
+    rtList.Offset(rect.left, rect.top);
+    rect.Union(rtList);
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboBoxImp::EditModifyStylesEx(FX_DWORD dwStylesExAdded,
+                                             FX_DWORD dwStylesExRemoved) {
+  if (m_pEdit != NULL) {
+    return m_pEdit->ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+  } else {
+    return FWL_ERR_Parameter_Invalid;
+  }
+}
+FX_FLOAT CFWL_ComboBoxImp::GetListHeight() {
+  return static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider)
+      ->GetListHeight(m_pInterface);
+}
+void CFWL_ComboBoxImp::DrawStretchHandler(CFX_Graphics* pGraphics,
+                                          const CFX_Matrix* pMatrix) {
+  CFWL_ThemeBackground param;
+  param.m_pGraphics = pGraphics;
+  param.m_iPart = FWL_PART_CMB_StretcgHandler;
+  param.m_dwStates = FWL_PARTSTATE_CMB_Normal;
+  param.m_pWidget = m_pInterface;
+  if (pMatrix) {
+    param.m_matrix.Concat(*pMatrix);
+  }
+  param.m_rtPart = m_rtHandler;
+  m_pProperties->m_pThemeProvider->DrawBackground(&param);
+}
+void CFWL_ComboBoxImp::ShowDropList(FX_BOOL bActivate) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_ShowDropList(bActivate);
+  }
+  FX_BOOL bDropList = IsDropListShowed();
+  if (bDropList == bActivate) {
+    return;
+  }
+  if (!m_pForm) {
+    InitProxyForm();
+  }
+  m_pListProxyDelegate->Reset();
+  if (bActivate) {
+    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
+        ->ChangeSelected(m_iCurSel);
+    ReSetListItemAlignment();
+    FX_DWORD dwStyleAdd = m_pProperties->m_dwStyleExes &
+                          (FWL_STYLEEXT_CMB_Sort | FWL_STYLEEXT_CMB_OwnerDraw);
+    m_pListBox->ModifyStylesEx(dwStyleAdd, 0);
+    m_pListBox->GetWidgetRect(m_rtList, TRUE);
+    FX_FLOAT fHeight = GetListHeight();
+    if (fHeight > 0) {
+      if (m_rtList.height > GetListHeight()) {
+        m_rtList.height = GetListHeight();
+        m_pListBox->ModifyStyles(FWL_WGTSTYLE_VScroll, 0);
+      }
+    }
+    CFX_RectF rtAnchor;
+    rtAnchor.Set(0, 0, m_pProperties->m_rtWidget.width,
+                 m_pProperties->m_rtWidget.height);
+    FX_FLOAT fMinHeight = 0;
+    if (m_rtList.width < m_rtClient.width) {
+      m_rtList.width = m_rtClient.width;
+    }
+    m_rtProxy = m_rtList;
+    if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListDrag) {
+      m_rtProxy.height += m_fComboFormHandler;
+    }
+    GetPopupPos(fMinHeight, m_rtProxy.height, rtAnchor, m_rtProxy);
+    if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListDrag) {
+      FX_FLOAT fx = 0;
+      FX_FLOAT fy = m_rtClient.top + m_rtClient.height / 2;
+      TransformTo(NULL, fx, fy);
+      m_bUpFormHandler = fy > m_rtProxy.top;
+      if (m_bUpFormHandler) {
+        m_rtHandler.Set(0, 0, m_rtList.width, m_fComboFormHandler);
+        m_rtList.top = m_fComboFormHandler;
+      } else {
+        m_rtHandler.Set(0, m_rtList.height, m_rtList.width,
+                        m_fComboFormHandler);
+      }
+    }
+    m_pForm->SetWidgetRect(m_rtProxy);
+    m_pForm->Update();
+    m_pListBox->SetWidgetRect(m_rtList);
+    m_pListBox->Update();
+    CFWL_EvtCmbPreDropDown ev;
+    ev.m_pSrcTarget = m_pInterface;
+    DispatchEvent(&ev);
+    m_fItemHeight =
+        static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->m_fItemHeight;
+    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->SetFocus(TRUE);
+    m_pForm->DoModal();
+    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->SetFocus(FALSE);
+  } else {
+    m_pForm->EndDoModal();
+    CFWL_EvtCmbCloseUp ev;
+    ev.m_pSrcTarget = m_pInterface;
+    DispatchEvent(&ev);
+    m_bLButtonDown = FALSE;
+    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->m_bNotifyOwner =
+        TRUE;
+    SetFocus(TRUE);
+  }
+}
+FX_BOOL CFWL_ComboBoxImp::IsDropListShowed() {
+  return m_pForm && !(m_pForm->GetStates() & FWL_WGTSTATE_Invisible);
+}
+FX_BOOL CFWL_ComboBoxImp::IsDropDownStyle() const {
+  return m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_DropDown;
+}
+void CFWL_ComboBoxImp::MatchEditText() {
+  CFX_WideString wsText;
+  m_pEdit->GetText(wsText);
+  int32_t iMatch =
+      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())->MatchItem(wsText);
+  if (iMatch != m_iCurSel) {
+    static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
+        ->ChangeSelected(iMatch);
+    if (iMatch >= 0) {
+      SynchrEditText(iMatch);
+    }
+  } else if (iMatch >= 0) {
+    static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->SetSelected();
+  }
+  m_iCurSel = iMatch;
+}
+void CFWL_ComboBoxImp::SynchrEditText(int32_t iListItem) {
+  CFX_WideString wsText;
+  IFWL_ComboBoxDP* pData =
+      static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iListItem);
+  static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
+      ->GetItemText(hItem, wsText);
+  m_pEdit->SetText(wsText);
+  m_pEdit->Update();
+  static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->SetSelected();
+}
+void CFWL_ComboBoxImp::Layout() {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_Layout();
+  }
+  GetClientRect(m_rtClient);
+  FX_FLOAT* pFWidth =
+      static_cast<FX_FLOAT*>(GetThemeCapacity(FWL_WGTCAPACITY_ScrollBarWidth));
+  if (!pFWidth)
+    return;
+  FX_FLOAT fBtn = *pFWidth;
+  m_rtBtn.Set(m_rtClient.right() - fBtn, m_rtClient.top, fBtn,
+              m_rtClient.height);
+  FX_BOOL bIsDropDown = IsDropDownStyle();
+  if (bIsDropDown && m_pEdit) {
+    CFX_RectF rtEdit;
+    rtEdit.Set(m_rtClient.left, m_rtClient.top, m_rtClient.width - fBtn,
+               m_rtClient.height);
+    m_pEdit->SetWidgetRect(rtEdit);
+    if (m_iCurSel >= 0) {
+      CFX_WideString wsText;
+      IFWL_ComboBoxDP* pData =
+          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
+          ->GetItemText(hItem, wsText);
+      m_pEdit->LockUpdate();
+      m_pEdit->SetText(wsText);
+      m_pEdit->UnlockUpdate();
+    }
+    m_pEdit->Update();
+  }
+}
+void CFWL_ComboBoxImp::ReSetTheme() {
+  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
+  if (!pTheme) {
+    pTheme = GetAvailableTheme();
+    m_pProperties->m_pThemeProvider = pTheme;
+  }
+  if (m_pListBox) {
+    if (!m_pListBox->GetThemeProvider() &&
+        pTheme->IsValidWidget(m_pListBox.get())) {
+      m_pListBox->SetThemeProvider(pTheme);
+    }
+  }
+  if (m_pEdit) {
+    if (!m_pEdit->GetThemeProvider() && pTheme->IsValidWidget(m_pEdit.get())) {
+      m_pEdit->SetThemeProvider(pTheme);
+    }
+  }
+}
+void CFWL_ComboBoxImp::ReSetEditAlignment() {
+  if (!m_pEdit)
+    return;
+  FX_DWORD dwStylExes = m_pProperties->m_dwStyleExes;
+  FX_DWORD dwAdd = 0;
+  switch (dwStylExes & FWL_STYLEEXT_CMB_EditHAlignMask) {
+    case FWL_STYLEEXT_CMB_EditHCenter: {
+      dwAdd |= FWL_STYLEEXT_EDT_HCenter;
+      break;
+    }
+    case FWL_STYLEEXT_CMB_EditHFar: {
+      dwAdd |= FWL_STYLEEXT_EDT_HFar;
+      break;
+    }
+    default: { dwAdd |= FWL_STYLEEXT_EDT_HNear; }
+  }
+  switch (dwStylExes & FWL_STYLEEXT_CMB_EditVAlignMask) {
+    case FWL_STYLEEXT_CMB_EditVCenter: {
+      dwAdd |= FWL_STYLEEXT_EDT_VCenter;
+      break;
+    }
+    case FWL_STYLEEXT_CMB_EditVFar: {
+      dwAdd |= FWL_STYLEEXT_EDT_VFar;
+      break;
+    }
+    default: { dwAdd |= FWL_STYLEEXT_EDT_VNear; }
+  }
+  if (dwStylExes & FWL_STYLEEXT_CMB_EditJustified) {
+    dwAdd |= FWL_STYLEEXT_EDT_Justified;
+  }
+  if (dwStylExes & FWL_STYLEEXT_CMB_EditDistributed) {
+    dwAdd |= FWL_STYLEEXT_EDT_Distributed;
+  }
+  m_pEdit->ModifyStylesEx(dwAdd, FWL_STYLEEXT_EDT_HAlignMask |
+                                     FWL_STYLEEXT_EDT_HAlignModeMask |
+                                     FWL_STYLEEXT_EDT_VAlignMask);
+}
+void CFWL_ComboBoxImp::ReSetListItemAlignment() {
+  if (!m_pListBox)
+    return;
+  FX_DWORD dwStylExes = m_pProperties->m_dwStyleExes;
+  FX_DWORD dwAdd = 0;
+  switch (dwStylExes & FWL_STYLEEXT_CMB_ListItemAlignMask) {
+    case FWL_STYLEEXT_CMB_ListItemCenterAlign: {
+      dwAdd |= FWL_STYLEEXT_LTB_CenterAlign;
+    }
+    case FWL_STYLEEXT_CMB_ListItemRightAlign: {
+      dwAdd |= FWL_STYLEEXT_LTB_RightAlign;
+    }
+    default: { dwAdd |= FWL_STYLEEXT_LTB_LeftAlign; }
+  }
+  m_pListBox->ModifyStylesEx(dwAdd, FWL_STYLEEXT_CMB_ListItemAlignMask);
+}
+void CFWL_ComboBoxImp::ProcessSelChanged(FX_BOOL bLButtonUp) {
+  IFWL_ComboBoxDP* pDatas =
+      static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+  m_iCurSel = pDatas->GetItemIndex(m_pInterface, m_pListBox->GetSelItem(0));
+  FX_BOOL bDropDown = IsDropDownStyle();
+  if (bDropDown) {
+    IFWL_ComboBoxDP* pData =
+        static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+    if (hItem) {
+      CFX_WideString wsText;
+      pData->GetItemText(m_pInterface, hItem, wsText);
+      if (m_pEdit) {
+        m_pEdit->SetText(wsText);
+        m_pEdit->Update();
+        static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->SetSelected();
+      }
+      CFWL_EvtCmbSelChanged ev;
+      ev.bLButtonUp = bLButtonUp;
+      ev.m_pSrcTarget = m_pInterface;
+      ev.iArraySels.Add(m_iCurSel);
+      DispatchEvent(&ev);
+    }
+  } else {
+    Repaint(&m_rtClient);
+  }
+}
+void CFWL_ComboBoxImp::InitProxyForm() {
+  if (m_pForm)
+    return;
+  if (!m_pListBox)
+    return;
+  CFWL_WidgetImpProperties propForm;
+  propForm.m_pOwner = m_pInterface;
+  propForm.m_dwStyles = FWL_WGTSTYLE_Popup;
+  propForm.m_dwStates = FWL_WGTSTATE_Invisible;
+  CFX_WideString className;
+  m_pForm = IFWL_Form::CreateFormProxy(propForm, &className, m_pListBox.get());
+  m_pForm->Initialize();
+  m_pProxy = static_cast<CFWL_FormProxyImp*>(m_pForm->GetImpl());
+  m_pListBox->SetParent(m_pForm);
+  m_pListProxyDelegate = new CFWL_ComboProxyImpDelegate(m_pForm, this);
+  m_pProxy->SetDelegate(m_pListProxyDelegate);
+}
+FWL_ERR CFWL_ComboBoxImp::DisForm_Initialize() {
+  if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
+    return FWL_WGTSTATE_Invisible;  // Ditto.
+  m_pDelegate = new CFWL_ComboBoxImpDelegate(this);
+  DisForm_InitComboList();
+  DisForm_InitComboEdit();
+  return FWL_ERR_Succeeded;
+}
+void CFWL_ComboBoxImp::DisForm_InitComboList() {
+  if (m_pListBox) {
+    return;
+  }
+  CFWL_WidgetImpProperties prop;
+  prop.m_pParent = m_pInterface;
+  prop.m_dwStyles = FWL_WGTSTYLE_Border | FWL_WGTSTYLE_VScroll;
+  prop.m_dwStates = FWL_WGTSTATE_Invisible;
+  prop.m_pDataProvider = m_pProperties->m_pDataProvider;
+  prop.m_pThemeProvider = m_pProperties->m_pThemeProvider;
+  m_pListBox.reset(IFWL_ListBox::CreateComboList(prop, m_pInterface));
+  m_pListBox->Initialize();
+}
+void CFWL_ComboBoxImp::DisForm_InitComboEdit() {
+  if (m_pEdit) {
+    return;
+  }
+  CFWL_WidgetImpProperties prop;
+  prop.m_pParent = m_pInterface;
+  prop.m_pThemeProvider = m_pProperties->m_pThemeProvider;
+  m_pEdit.reset(IFWL_Edit::CreateComboEdit(prop, m_pInterface));
+  m_pEdit->Initialize();
+  static_cast<CFWL_ComboEditImp*>(m_pEdit->GetImpl())->SetOuter(m_pInterface);
+}
+void CFWL_ComboBoxImp::DisForm_ShowDropList(FX_BOOL bActivate) {
+  FX_BOOL bDropList = DisForm_IsDropListShowed();
+  if (bDropList == bActivate) {
+    return;
+  }
+  if (bActivate) {
+    CFWL_EvtCmbPreDropDown preEvent;
+    preEvent.m_pSrcTarget = m_pInterface;
+    DispatchEvent(&preEvent);
+    CFWL_ComboListImp* pComboList =
+        static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl());
+    int32_t iItems = pComboList->CountItems();
+    if (iItems < 1) {
+      return;
+    }
+    ReSetListItemAlignment();
+    pComboList->ChangeSelected(m_iCurSel);
+    FX_FLOAT fItemHeight = pComboList->GetItemHeigt();
+    FX_FLOAT fBorder = GetBorderSize();
+    FX_FLOAT fPopupMin = 0.0f;
+    if (iItems > 3) {
+      fPopupMin = fItemHeight * 3 + fBorder * 2;
+    }
+    FX_FLOAT fPopupMax = fItemHeight * iItems + fBorder * 2;
+    CFX_RectF rtList;
+    rtList.left = m_rtClient.left;
+    rtList.width = m_pProperties->m_rtWidget.width;
+    rtList.top = 0;
+    rtList.height = 0;
+    GetPopupPos(fPopupMin, fPopupMax, m_pProperties->m_rtWidget, rtList);
+    m_pListBox->SetWidgetRect(rtList);
+    m_pListBox->Update();
+  } else {
+    SetFocus(TRUE);
+  }
+  m_pListBox->SetStates(FWL_WGTSTATE_Invisible, !bActivate);
+  if (bActivate) {
+    CFWL_EvtCmbPostDropDown postEvent;
+    postEvent.m_pSrcTarget = m_pInterface;
+    DispatchEvent(&postEvent);
+  }
+  CFX_RectF rect;
+  m_pListBox->GetWidgetRect(rect);
+  rect.Inflate(2, 2);
+  Repaint(&rect);
+}
+FX_BOOL CFWL_ComboBoxImp::DisForm_IsDropListShowed() {
+  return !(m_pListBox->GetStates() & FWL_WGTSTATE_Invisible);
+}
+FWL_ERR CFWL_ComboBoxImp::DisForm_ModifyStylesEx(FX_DWORD dwStylesExAdded,
+                                                 FX_DWORD dwStylesExRemoved) {
+  if (!m_pEdit) {
+    DisForm_InitComboEdit();
+  }
+  FX_BOOL bAddDropDown = dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown;
+  FX_BOOL bDelDropDown = dwStylesExRemoved & FWL_STYLEEXT_CMB_DropDown;
+  dwStylesExRemoved &= ~FWL_STYLEEXT_CMB_DropDown;
+  m_pProperties->m_dwStyleExes |= FWL_STYLEEXT_CMB_DropDown;
+  if (bAddDropDown) {
+    m_pEdit->ModifyStylesEx(0, FWL_STYLEEXT_EDT_ReadOnly);
+  } else if (bDelDropDown) {
+    m_pEdit->ModifyStylesEx(FWL_STYLEEXT_EDT_ReadOnly, 0);
+  }
+  return CFWL_WidgetImp::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+}
+FWL_ERR CFWL_ComboBoxImp::DisForm_Update() {
+  if (m_iLock) {
+    return FWL_ERR_Indefinite;
+  }
+  if (m_pEdit) {
+    ReSetEditAlignment();
+  }
+  ReSetTheme();
+  Layout();
+  return FWL_ERR_Succeeded;
+}
+FX_DWORD CFWL_ComboBoxImp::DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  CFX_RectF rect;
+  rect.Set(0, 0, m_pProperties->m_rtWidget.width - m_rtBtn.width,
+           m_pProperties->m_rtWidget.height);
+  if (rect.Contains(fx, fy)) {
+    return FWL_WGTHITTEST_Edit;
+  }
+  if (m_rtBtn.Contains(fx, fy)) {
+    return FWL_WGTHITTEST_Client;
+  }
+  if (DisForm_IsDropListShowed()) {
+    m_pListBox->GetWidgetRect(rect);
+    if (rect.Contains(fx, fy)) {
+      return FWL_WGTHITTEST_Client;
+    }
+  }
+  return FWL_WGTHITTEST_Unknown;
+}
+FWL_ERR CFWL_ComboBoxImp::DisForm_DrawWidget(CFX_Graphics* pGraphics,
+                                             const CFX_Matrix* pMatrix) {
+  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
+  CFX_Matrix mtOrg;
+  mtOrg.Set(1, 0, 0, 1, 0, 0);
+  if (pMatrix) {
+    mtOrg = *pMatrix;
+  }
+  FX_BOOL bListShowed = m_pListBox && DisForm_IsDropListShowed();
+  pGraphics->SaveGraphState();
+  pGraphics->ConcatMatrix(&mtOrg);
+  if (!m_rtBtn.IsEmpty(0.1f)) {
+    CFWL_ThemeBackground param;
+    param.m_pWidget = m_pInterface;
+    param.m_iPart = FWL_PART_CMB_DropDownButton;
+    param.m_dwStates = m_iBtnState;
+    param.m_pGraphics = pGraphics;
+    param.m_rtPart = m_rtBtn;
+    pTheme->DrawBackground(&param);
+  }
+  pGraphics->RestoreGraphState();
+  if (m_pEdit) {
+    CFX_RectF rtEdit;
+    m_pEdit->GetWidgetRect(rtEdit);
+    CFX_Matrix mt;
+    mt.Set(1, 0, 0, 1, rtEdit.left, rtEdit.top);
+    mt.Concat(mtOrg);
+    m_pEdit->DrawWidget(pGraphics, &mt);
+  }
+  if (bListShowed) {
+    CFX_RectF rtList;
+    m_pListBox->GetWidgetRect(rtList);
+    CFX_Matrix mt;
+    mt.Set(1, 0, 0, 1, rtList.left, rtList.top);
+    mt.Concat(mtOrg);
+    m_pListBox->DrawWidget(pGraphics, &mt);
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboBoxImp::DisForm_GetBBox(CFX_RectF& rect) {
+  rect = m_pProperties->m_rtWidget;
+  if (m_pListBox && DisForm_IsDropListShowed()) {
+    CFX_RectF rtList;
+    m_pListBox->GetWidgetRect(rtList);
+    rtList.Offset(rect.left, rect.top);
+    rect.Union(rtList);
+  }
+  return FWL_ERR_Succeeded;
+}
+void CFWL_ComboBoxImp::DisForm_Layout() {
+  GetClientRect(m_rtClient);
+  m_rtContent = m_rtClient;
+  FX_FLOAT* pFWidth =
+      static_cast<FX_FLOAT*>(GetThemeCapacity(FWL_WGTCAPACITY_ScrollBarWidth));
+  if (!pFWidth)
+    return;
+  FX_FLOAT borderWidth = 0;
+  { borderWidth = FWL_PART_CMB_Border; }
+  FX_FLOAT fBtn = *pFWidth;
+  if (!(this->GetStylesEx() & FWL_STYLEEXT_CMB_ReadOnly)) {
+    m_rtBtn.Set(m_rtClient.right() - fBtn, m_rtClient.top + borderWidth,
+                fBtn - borderWidth, m_rtClient.height - 2 * borderWidth);
+  }
+  CFX_RectF* pUIMargin =
+      static_cast<CFX_RectF*>(GetThemeCapacity(FWL_WGTCAPACITY_UIMargin));
+  if (pUIMargin) {
+    m_rtContent.Deflate(pUIMargin->left, pUIMargin->top, pUIMargin->width,
+                        pUIMargin->height);
+  }
+  FX_BOOL bIsDropDown = IsDropDownStyle();
+  if (bIsDropDown && m_pEdit) {
+    CFX_RectF rtEdit;
+    rtEdit.Set(m_rtContent.left, m_rtContent.top, m_rtContent.width - fBtn,
+               m_rtContent.height);
+    m_pEdit->SetWidgetRect(rtEdit);
+    if (m_iCurSel >= 0) {
+      CFX_WideString wsText;
+      IFWL_ComboBoxDP* pData =
+          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+      static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
+          ->GetItemText(hItem, wsText);
+      m_pEdit->LockUpdate();
+      m_pEdit->SetText(wsText);
+      m_pEdit->UnlockUpdate();
+    }
+    m_pEdit->Update();
+  }
+}
+CFWL_ComboBoxImpDelegate::CFWL_ComboBoxImpDelegate(CFWL_ComboBoxImp* pOwner)
+    : m_pOwner(pOwner) {}
+int32_t CFWL_ComboBoxImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
+  if (m_pOwner->m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_OnProcessMessage(pMessage);
+  }
+  if (!pMessage)
+    return 0;
+  FX_DWORD dwMsgCode = pMessage->GetClassID();
+  FX_BOOL iRet = 1;
+  switch (dwMsgCode) {
+    case FWL_MSGHASH_SetFocus:
+    case FWL_MSGHASH_KillFocus: {
+      OnFocusChanged(pMessage, dwMsgCode == FWL_MSGHASH_SetFocus);
+      break;
+    }
+    case FWL_MSGHASH_Mouse: {
+      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
+      FX_DWORD dwCmd = pMsg->m_dwCmd;
+      switch (dwCmd) {
+        case FWL_MSGMOUSECMD_LButtonDown: {
+          OnLButtonDown(pMsg);
+          break;
+        }
+        case FWL_MSGMOUSECMD_LButtonUp: {
+          OnLButtonUp(pMsg);
+          break;
+        }
+        case FWL_MSGMOUSECMD_MouseMove: {
+          OnMouseMove(pMsg);
+          break;
+        }
+        case FWL_MSGMOUSECMD_MouseLeave: {
+          OnMouseLeave(pMsg);
+          break;
+        }
+        default: {}
+      }
+      break;
+    }
+    case FWL_MSGHASH_Key: {
+      OnKey(static_cast<CFWL_MsgKey*>(pMessage));
+      break;
+    }
+    default: { iRet = 0; }
+  }
+  CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
+  return iRet;
+}
+FWL_ERR CFWL_ComboBoxImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {
+  FX_DWORD dwFlag = pEvent->GetClassID();
+  if (dwFlag == FWL_EVTHASH_LTB_DrawItem) {
+    CFWL_EvtLtbDrawItem* pDrawItemEvent =
+        static_cast<CFWL_EvtLtbDrawItem*>(pEvent);
+    CFWL_EvtCmbDrawItem pTemp;
+    pTemp.m_pSrcTarget = m_pOwner->m_pInterface;
+    pTemp.m_pGraphics = pDrawItemEvent->m_pGraphics;
+    pTemp.m_index = pDrawItemEvent->m_index;
+    pTemp.m_rtItem = pDrawItemEvent->m_rect;
+    m_pOwner->DispatchEvent(&pTemp);
+  } else if (dwFlag == FWL_EVTHASH_Scroll) {
+    CFWL_EvtScroll* pScrollEvent = static_cast<CFWL_EvtScroll*>(pEvent);
+    CFWL_EvtScroll pScrollEv;
+    pScrollEv.m_pSrcTarget = m_pOwner->m_pInterface;
+    pScrollEv.m_iScrollCode = pScrollEvent->m_iScrollCode;
+    pScrollEv.m_fPos = pScrollEvent->m_fPos;
+    m_pOwner->DispatchEvent(&pScrollEv);
+  } else if (dwFlag == FWL_EVTHASH_EDT_TextChanged) {
+    CFWL_EvtEdtTextChanged* pTextChangedEvent =
+        static_cast<CFWL_EvtEdtTextChanged*>(pEvent);
+    CFWL_EvtCmbEditChanged pTemp;
+    pTemp.m_pSrcTarget = m_pOwner->m_pInterface;
+    pTemp.wsInsert = pTextChangedEvent->wsInsert;
+    pTemp.wsDelete = pTextChangedEvent->wsDelete;
+    pTemp.nChangeType = pTextChangedEvent->nChangeType;
+    m_pOwner->DispatchEvent(&pTemp);
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ComboBoxImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
+                                               const CFX_Matrix* pMatrix) {
+  return m_pOwner->DrawWidget(pGraphics, pMatrix);
+}
+void CFWL_ComboBoxImpDelegate::OnFocusChanged(CFWL_Message* pMsg,
+                                              FX_BOOL bSet) {
+  IFWL_Target* pDstTarget = pMsg->m_pDstTarget;
+  IFWL_Target* pSrcTarget = pMsg->m_pSrcTarget;
+  FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
+  if (bSet) {
+    m_pOwner->m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
+    if (bDropDown && pSrcTarget != m_pOwner->m_pListBox.get()) {
+      if (!m_pOwner->m_pEdit)
+        return;
+      static_cast<CFWL_ComboEditImp*>(m_pOwner->m_pEdit->GetImpl())
+          ->SetSelected();
+    } else {
+      m_pOwner->Repaint(&m_pOwner->m_rtClient);
+    }
+  } else {
+    m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
+    if (bDropDown && pDstTarget != m_pOwner->m_pListBox.get()) {
+      if (!m_pOwner->m_pEdit)
+        return;
+      static_cast<CFWL_ComboEditImp*>(m_pOwner->m_pEdit->GetImpl())
+          ->FlagFocus(FALSE);
+      static_cast<CFWL_ComboEditImp*>(m_pOwner->m_pEdit->GetImpl())
+          ->ClearSelected();
+    } else {
+      m_pOwner->Repaint(&m_pOwner->m_rtClient);
+    }
+  }
+}
+void CFWL_ComboBoxImpDelegate::OnLButtonDown(CFWL_MsgMouse* pMsg) {
+  if (m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
+    return;
+  }
+  FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
+  CFX_RectF& rtBtn = bDropDown ? m_pOwner->m_rtBtn : m_pOwner->m_rtClient;
+  FX_BOOL bClickBtn = rtBtn.Contains(pMsg->m_fx, pMsg->m_fy);
+  if (bClickBtn) {
+    if (bDropDown && m_pOwner->m_pEdit) {
+      m_pOwner->MatchEditText();
+    }
+    m_pOwner->m_bLButtonDown = TRUE;
+    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Pressed;
+    m_pOwner->Repaint(&m_pOwner->m_rtClient);
+    m_pOwner->ShowDropList(TRUE);
+    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Normal;
+    m_pOwner->Repaint(&m_pOwner->m_rtClient);
+  }
+}
+void CFWL_ComboBoxImpDelegate::OnLButtonUp(CFWL_MsgMouse* pMsg) {
+  m_pOwner->m_bLButtonDown = FALSE;
+  if (m_pOwner->m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
+    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Hovered;
+  } else {
+    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Normal;
+  }
+  m_pOwner->Repaint(&m_pOwner->m_rtBtn);
+}
+void CFWL_ComboBoxImpDelegate::OnMouseMove(CFWL_MsgMouse* pMsg) {
+  int32_t iOldState = m_pOwner->m_iBtnState;
+  if (m_pOwner->m_rtBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
+    m_pOwner->m_iBtnState = m_pOwner->m_bLButtonDown
+                                ? FWL_PARTSTATE_CMB_Pressed
+                                : FWL_PARTSTATE_CMB_Hovered;
+  } else {
+    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Normal;
+  }
+  if ((iOldState != m_pOwner->m_iBtnState) &&
+      !((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) ==
+        FWL_WGTSTATE_Disabled)) {
+    m_pOwner->Repaint(&m_pOwner->m_rtBtn);
+  }
+}
+void CFWL_ComboBoxImpDelegate::OnMouseLeave(CFWL_MsgMouse* pMsg) {
+  if (!m_pOwner->IsDropListShowed() &&
+      !((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) ==
+        FWL_WGTSTATE_Disabled)) {
+    m_pOwner->m_iBtnState = FWL_PARTSTATE_CMB_Normal;
+    m_pOwner->Repaint(&m_pOwner->m_rtBtn);
+  }
+}
+void CFWL_ComboBoxImpDelegate::OnKey(CFWL_MsgKey* pMsg) {
+  FX_DWORD dwKeyCode = pMsg->m_dwKeyCode;
+  if (dwKeyCode == FWL_VKEY_Tab) {
+    m_pOwner->DispatchKeyEvent(pMsg);
+    return;
+  }
+  FX_BOOL bSubCtrlKey = pMsg->m_pDstTarget == m_pOwner->m_pInterface;
+  if (bSubCtrlKey) {
+    DoSubCtrlKey(pMsg);
+  }
+}
+void CFWL_ComboBoxImpDelegate::DoSubCtrlKey(CFWL_MsgKey* pMsg) {
+  FX_DWORD dwKeyCode = pMsg->m_dwKeyCode;
+  FX_BOOL bUp = dwKeyCode == FWL_VKEY_Up;
+  FX_BOOL bDown = dwKeyCode == FWL_VKEY_Down;
+  if (bUp || bDown) {
+    int32_t iCount = static_cast<CFWL_ComboListImp*>(
+                         m_pOwner->m_pListBox->GetImpl())->CountItems();
+    if (iCount < 1) {
+      return;
+    }
+    FX_BOOL bMatchEqual = FALSE;
+    int32_t iCurSel = m_pOwner->m_iCurSel;
+    FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
+    if (bDropDown && m_pOwner->m_pEdit) {
+      CFX_WideString wsText;
+      m_pOwner->m_pEdit->GetText(wsText);
+      iCurSel = static_cast<CFWL_ComboListImp*>(m_pOwner->m_pListBox->GetImpl())
+                    ->MatchItem(wsText);
+      if (iCurSel >= 0) {
+        CFX_WideString wsTemp;
+        IFWL_ComboBoxDP* pData = static_cast<IFWL_ComboBoxDP*>(
+            m_pOwner->m_pProperties->m_pDataProvider);
+        FWL_HLISTITEM hItem = pData->GetItem(m_pOwner->m_pInterface, iCurSel);
+        static_cast<CFWL_ComboListImp*>(m_pOwner->m_pListBox->GetImpl())
+            ->GetItemText(hItem, wsTemp);
+        bMatchEqual = wsText.Equal(wsTemp);
+      }
+    }
+    if (iCurSel < 0) {
+      iCurSel = 0;
+    } else if (!bDropDown || bMatchEqual) {
+      if ((bUp && iCurSel == 0) || (bDown && iCurSel == iCount - 1)) {
+        return;
+      }
+      if (bUp) {
+        iCurSel--;
+      } else {
+        iCurSel++;
+      }
+    }
+    m_pOwner->m_iCurSel = iCurSel;
+    if (bDropDown && m_pOwner->m_pEdit) {
+      m_pOwner->SynchrEditText(m_pOwner->m_iCurSel);
+    } else {
+      m_pOwner->Repaint(&m_pOwner->m_rtClient);
+    }
+    return;
+  }
+  FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
+  if (bDropDown) {
+    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
+    pDelegate->OnProcessMessage(pMsg);
+  }
+}
+int32_t CFWL_ComboBoxImpDelegate::DisForm_OnProcessMessage(
+    CFWL_Message* pMessage) {
+  if (!pMessage)
+    return 0;
+  FX_DWORD dwMsgCode = pMessage->GetClassID();
+  FX_BOOL backDefault = TRUE;
+  switch (dwMsgCode) {
+    case FWL_MSGHASH_SetFocus:
+    case FWL_MSGHASH_KillFocus: {
+      backDefault = FALSE;
+      DisForm_OnFocusChanged(pMessage, dwMsgCode == FWL_MSGHASH_SetFocus);
+      break;
+    }
+    case FWL_MSGHASH_Mouse: {
+      backDefault = FALSE;
+      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
+      FX_DWORD dwCmd = pMsg->m_dwCmd;
+      switch (dwCmd) {
+        case FWL_MSGMOUSECMD_LButtonDown: {
+          DisForm_OnLButtonDown(pMsg);
+          break;
+        }
+        case FWL_MSGMOUSECMD_LButtonUp: {
+          OnLButtonUp(pMsg);
+          break;
+        }
+        default: {}
+      }
+      break;
+    }
+    case FWL_MSGHASH_Key: {
+      backDefault = FALSE;
+      CFWL_MsgKey* pKey = static_cast<CFWL_MsgKey*>(pMessage);
+      if (pKey->m_dwCmd == FWL_MSGKEYCMD_KeyUp) {
+        break;
+      }
+      if (m_pOwner->DisForm_IsDropListShowed() &&
+          pKey->m_dwCmd == FWL_MSGKEYCMD_KeyDown) {
+        FX_DWORD dwKeyCode = pKey->m_dwKeyCode;
+        FX_BOOL bListKey =
+            dwKeyCode == FWL_VKEY_Up || dwKeyCode == FWL_VKEY_Down ||
+            dwKeyCode == FWL_VKEY_Return || dwKeyCode == FWL_VKEY_Escape;
+        if (bListKey) {
+          IFWL_WidgetDelegate* pDelegate =
+              m_pOwner->m_pListBox->SetDelegate(NULL);
+          pDelegate->OnProcessMessage(pMessage);
+          break;
+        }
+      }
+      DisForm_OnKey(pKey);
+      break;
+    }
+    default: {}
+  }
+  if (!backDefault) {
+    return 1;
+  }
+  return CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
+}
+void CFWL_ComboBoxImpDelegate::DisForm_OnLButtonDown(CFWL_MsgMouse* pMsg) {
+  FX_BOOL bDropDown = m_pOwner->DisForm_IsDropListShowed();
+  CFX_RectF& rtBtn = bDropDown ? m_pOwner->m_rtBtn : m_pOwner->m_rtClient;
+  FX_BOOL bClickBtn = rtBtn.Contains(pMsg->m_fx, pMsg->m_fy);
+  if (bClickBtn) {
+    if (m_pOwner->DisForm_IsDropListShowed()) {
+      m_pOwner->DisForm_ShowDropList(FALSE);
+      return;
+    }
+    {
+      if (m_pOwner->m_pEdit) {
+        m_pOwner->MatchEditText();
+      }
+      m_pOwner->DisForm_ShowDropList(TRUE);
+    }
+  }
+}
+void CFWL_ComboBoxImpDelegate::DisForm_OnFocusChanged(CFWL_Message* pMsg,
+                                                      FX_BOOL bSet) {
+  if (bSet) {
+    m_pOwner->m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
+    if ((m_pOwner->m_pEdit->GetStates() & FWL_WGTSTATE_Focused) == 0) {
+      CFWL_MsgSetFocus msg;
+      msg.m_pDstTarget = m_pOwner->m_pEdit.get();
+      msg.m_pSrcTarget = NULL;
+      IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
+      pDelegate->OnProcessMessage(&msg);
+    }
+  } else {
+    m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
+    m_pOwner->DisForm_ShowDropList(FALSE);
+    CFWL_MsgKillFocus msg;
+    msg.m_pDstTarget = NULL;
+    msg.m_pSrcTarget = m_pOwner->m_pEdit.get();
+    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
+    pDelegate->OnProcessMessage(&msg);
+  }
+}
+void CFWL_ComboBoxImpDelegate::DisForm_OnKey(CFWL_MsgKey* pMsg) {
+  FX_DWORD dwKeyCode = pMsg->m_dwKeyCode;
+  FX_BOOL bUp = dwKeyCode == FWL_VKEY_Up;
+  FX_BOOL bDown = dwKeyCode == FWL_VKEY_Down;
+  if (bUp || bDown) {
+    CFWL_ComboListImp* pComboList =
+        static_cast<CFWL_ComboListImp*>(m_pOwner->m_pListBox->GetImpl());
+    int32_t iCount = pComboList->CountItems();
+    if (iCount < 1) {
+      return;
+    }
+    FX_BOOL bMatchEqual = FALSE;
+    int32_t iCurSel = m_pOwner->m_iCurSel;
+    if (m_pOwner->m_pEdit) {
+      CFX_WideString wsText;
+      m_pOwner->m_pEdit->GetText(wsText);
+      iCurSel = pComboList->MatchItem(wsText);
+      if (iCurSel >= 0) {
+        CFX_WideString wsTemp;
+        FWL_HLISTITEM item = m_pOwner->m_pListBox->GetSelItem(iCurSel);
+        m_pOwner->m_pListBox->GetItemText(item, wsTemp);
+        bMatchEqual = wsText.Equal(wsTemp);
+      }
+    }
+    if (iCurSel < 0) {
+      iCurSel = 0;
+    } else if (bMatchEqual) {
+      if ((bUp && iCurSel == 0) || (bDown && iCurSel == iCount - 1)) {
+        return;
+      }
+      if (bUp) {
+        iCurSel--;
+      } else {
+        iCurSel++;
+      }
+    }
+    m_pOwner->m_iCurSel = iCurSel;
+    m_pOwner->SynchrEditText(m_pOwner->m_iCurSel);
+    return;
+  }
+  if (m_pOwner->m_pEdit) {
+    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
+    pDelegate->OnProcessMessage(pMsg);
+  }
+}
+CFWL_ComboProxyImpDelegate::CFWL_ComboProxyImpDelegate(
+    IFWL_Form* pForm,
+    CFWL_ComboBoxImp* pComboBox)
+    : m_bLButtonDown(FALSE),
+      m_bLButtonUpSelf(FALSE),
+      m_fStartPos(0),
+      m_pForm(pForm),
+      m_pComboBox(pComboBox) {
+}
+int32_t CFWL_ComboProxyImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
+  if (!pMessage)
+    return 0;
+  FX_DWORD dwMsgCode = pMessage->GetClassID();
+  if (dwMsgCode == FWL_MSGHASH_Mouse) {
+    CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
+    FX_DWORD dwCmd = pMsg->m_dwCmd;
+    switch (dwCmd) {
+      case FWL_MSGMOUSECMD_LButtonDown: {
+        OnLButtonDown(pMsg);
+        break;
+      }
+      case FWL_MSGMOUSECMD_LButtonUp: {
+        OnLButtonUp(pMsg);
+        break;
+      }
+      case FWL_MSGMOUSECMD_MouseMove: {
+        OnMouseMove(pMsg);
+        break;
+      }
+      default: {}
+    }
+  }
+  if (dwMsgCode == FWL_MSGHASH_Deactivate) {
+    OnDeactive(static_cast<CFWL_MsgDeactivate*>(pMessage));
+  }
+  if (dwMsgCode == FWL_MSGHASH_KillFocus || dwMsgCode == FWL_MSGHASH_SetFocus) {
+    OnFocusChanged(static_cast<CFWL_MsgKillFocus*>(pMessage),
+                   dwMsgCode == FWL_MSGHASH_SetFocus);
+  }
+  return CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
+}
+FWL_ERR CFWL_ComboProxyImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
+                                                 const CFX_Matrix* pMatrix) {
+  m_pComboBox->DrawStretchHandler(pGraphics, pMatrix);
+  return FWL_ERR_Succeeded;
+}
+void CFWL_ComboProxyImpDelegate::OnLButtonDown(CFWL_MsgMouse* pMsg) {
+  IFWL_NoteThread* pThread = m_pForm->GetOwnerThread();
+  if (!pThread)
+    return;
+  CFWL_NoteDriver* pDriver =
+      static_cast<CFWL_NoteDriver*>(pThread->GetNoteDriver());
+  CFX_RectF rtWidget;
+  m_pForm->GetWidgetRect(rtWidget);
+  rtWidget.left = rtWidget.top = 0;
+  if (rtWidget.Contains(pMsg->m_fx, pMsg->m_fy)) {
+    m_bLButtonDown = TRUE;
+    pDriver->SetGrab(m_pForm, TRUE);
+  } else {
+    m_bLButtonDown = FALSE;
+    pDriver->SetGrab(m_pForm, FALSE);
+    m_pComboBox->ShowDropList(FALSE);
+    return;
+  }
+  IFWL_AdapterNative* pNative = FWL_GetAdapterNative();
+  IFWL_AdapterCursorMgr* pCursorMgr = pNative->GetCursorMgr();
+  FWL_HCURSOR hCursor = pCursorMgr->GetSystemCursor(FWL_CURSORTYPE_SizeNS);
+  pCursorMgr->SetCursor(hCursor);
+  pCursorMgr->ShowCursor(TRUE);
+  m_pForm->TransformTo(NULL, pMsg->m_fx, pMsg->m_fy);
+  m_fStartPos = pMsg->m_fy;
+}
+void CFWL_ComboProxyImpDelegate::OnLButtonUp(CFWL_MsgMouse* pMsg) {
+  m_bLButtonDown = FALSE;
+  IFWL_NoteThread* pThread = m_pForm->GetOwnerThread();
+  if (!pThread)
+    return;
+  CFWL_NoteDriver* pDriver =
+      static_cast<CFWL_NoteDriver*>(pThread->GetNoteDriver());
+  pDriver->SetGrab(m_pForm, FALSE);
+  if (m_bLButtonUpSelf) {
+    CFX_RectF rect;
+    m_pForm->GetWidgetRect(rect);
+    rect.left = rect.top = 0;
+    if (!rect.Contains(pMsg->m_fx, pMsg->m_fy) &&
+        m_pComboBox->IsDropListShowed()) {
+      m_pComboBox->ShowDropList(FALSE);
+    }
+  } else {
+    m_bLButtonUpSelf = TRUE;
+  }
+}
+void CFWL_ComboProxyImpDelegate::OnMouseMove(CFWL_MsgMouse* pMsg) {
+  IFWL_AdapterNative* pNative = FWL_GetAdapterNative();
+  IFWL_AdapterCursorMgr* pCursorMgr = pNative->GetCursorMgr();
+  FWL_CURSORTYPE cursorType = FWL_CURSORTYPE_Arrow;
+  if (m_pComboBox->m_rtHandler.Contains(pMsg->m_fx, pMsg->m_fy)) {
+    cursorType = FWL_CURSORTYPE_SizeNS;
+  }
+  FWL_HCURSOR hCursor = pCursorMgr->GetSystemCursor(cursorType);
+  pCursorMgr->SetCursor(hCursor);
+  pCursorMgr->ShowCursor(TRUE);
+  if (!m_bLButtonDown) {
+    return;
+  }
+  m_pForm->TransformTo(NULL, pMsg->m_fx, pMsg->m_fy);
+  FX_FLOAT fChanged = pMsg->m_fy - m_fStartPos;
+  if (m_pComboBox->m_bUpFormHandler) {
+    fChanged = m_fStartPos - pMsg->m_fy;
+  }
+  if (m_pComboBox->m_rtList.height + fChanged < m_pComboBox->m_fItemHeight) {
+    return;
+  }
+  m_pComboBox->m_rtList.height += fChanged;
+  m_pComboBox->m_rtProxy.height += fChanged;
+  if (m_pComboBox->m_bUpFormHandler) {
+    m_pComboBox->m_rtProxy.top -= fChanged;
+    m_pComboBox->m_rtHandler.Set(0, 0, m_pComboBox->m_rtList.width,
+                                 m_pComboBox->m_fComboFormHandler);
+  } else {
+    m_pComboBox->m_rtHandler.Set(0, m_pComboBox->m_rtList.height,
+                                 m_pComboBox->m_rtList.width,
+                                 m_pComboBox->m_fComboFormHandler);
+  }
+  m_pForm->SetWidgetRect(m_pComboBox->m_rtProxy);
+  m_pComboBox->m_pListBox->SetWidgetRect(m_pComboBox->m_rtList);
+  m_pComboBox->m_pListBox->Update();
+  m_fStartPos = pMsg->m_fy;
+}
+void CFWL_ComboProxyImpDelegate::OnDeactive(CFWL_MsgDeactivate* pMsg) {
+  m_pComboBox->ShowDropList(FALSE);
+}
+void CFWL_ComboProxyImpDelegate::OnFocusChanged(CFWL_MsgKillFocus* pMsg,
+                                                FX_BOOL bSet) {
+  if (!bSet) {
+    if (pMsg->m_pSetFocus == NULL) {
+      m_pComboBox->ShowDropList(FALSE);
+    }
+  }
+}