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

This Cl merges the implementation classes up into the IFWL classes as the
intermediate classes were just acting as proxies.

Review-Url: https://chromiumcodereview.appspot.com/2432423002

1 files changed, 1444 insertions, 0 deletions

diff --git a/xfa/fwl/core/ifwl_combobox.cpp b/xfa/fwl/core/ifwl_combobox.cpp
new file mode 100644
index 0000000000..6a4c13f4a6
--- /dev/null
+++ b/xfa/fwl/core/ifwl_combobox.cpp
@@ -0,0 +1,1444 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "xfa/fwl/core/ifwl_combobox.h"
+
+#include "xfa/fde/cfde_txtedtengine.h"
+#include "xfa/fde/tto/fde_textout.h"
+#include "xfa/fwl/core/cfwl_message.h"
+#include "xfa/fwl/core/cfwl_themebackground.h"
+#include "xfa/fwl/core/cfwl_themepart.h"
+#include "xfa/fwl/core/cfwl_themetext.h"
+#include "xfa/fwl/core/cfwl_widgetmgr.h"
+#include "xfa/fwl/core/fwl_noteimp.h"
+#include "xfa/fwl/core/ifwl_app.h"
+#include "xfa/fwl/core/ifwl_comboedit.h"
+#include "xfa/fwl/core/ifwl_combolist.h"
+#include "xfa/fwl/core/ifwl_formproxy.h"
+#include "xfa/fwl/core/ifwl_themeprovider.h"
+
+// static
+IFWL_ComboBox* IFWL_ComboBox::Create(
+    const CFWL_WidgetImpProperties& properties) {
+  return new IFWL_ComboBox(properties, nullptr);
+}
+
+IFWL_ComboBox::IFWL_ComboBox(const CFWL_WidgetImpProperties& properties,
+                             IFWL_Widget* pOuter)
+    : IFWL_Widget(properties, pOuter),
+      m_pForm(nullptr),
+      m_bLButtonDown(FALSE),
+      m_iCurSel(-1),
+      m_iBtnState(CFWL_PartState_Normal),
+      m_fComboFormHandler(0),
+      m_bNeedShowList(FALSE) {
+  m_rtClient.Reset();
+  m_rtBtn.Reset();
+  m_rtHandler.Reset();
+}
+
+IFWL_ComboBox::~IFWL_ComboBox() {}
+
+FWL_Error IFWL_ComboBox::GetClassName(CFX_WideString& wsClass) const {
+  wsClass = FWL_CLASS_ComboBox;
+  return FWL_Error::Succeeded;
+}
+
+FWL_Type IFWL_ComboBox::GetClassID() const {
+  return FWL_Type::ComboBox;
+}
+
+FWL_Error IFWL_ComboBox::Initialize() {
+  if (m_pWidgetMgr->IsFormDisabled())
+    return DisForm_Initialize();
+
+  if (IFWL_Widget::Initialize() != FWL_Error::Succeeded)
+    return FWL_Error::Indefinite;
+
+  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_ComboList::Create(prop, this));
+  m_pListBox->Initialize();
+  if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_DropDown) && !m_pEdit) {
+    CFWL_WidgetImpProperties prop2;
+    m_pEdit.reset(IFWL_ComboEdit::Create(prop2, this));
+    m_pEdit->Initialize();
+    m_pEdit->SetOuter(this);
+  }
+  if (m_pEdit)
+    m_pEdit->SetParent(this);
+
+  SetStates(m_pProperties->m_dwStates);
+  return FWL_Error::Succeeded;
+}
+
+FWL_Error IFWL_ComboBox::Finalize() {
+  if (m_pEdit) {
+    m_pEdit->Finalize();
+  }
+  m_pListBox->Finalize();
+  delete m_pDelegate;
+  m_pDelegate = nullptr;
+  return IFWL_Widget::Finalize();
+}
+
+FWL_Error IFWL_ComboBox::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(CFWL_WidgetCapacity::ScrollBarWidth));
+    if (!pFWidth)
+      return FWL_Error::Indefinite;
+    rect.Inflate(0, 0, *pFWidth, 0);
+    IFWL_Widget::GetWidgetRect(rect, TRUE);
+  } else {
+    rect = m_pProperties->m_rtWidget;
+  }
+  return FWL_Error::Succeeded;
+}
+
+FWL_Error IFWL_ComboBox::ModifyStylesEx(uint32_t dwStylesExAdded,
+                                        uint32_t dwStylesExRemoved) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+  }
+  bool bAddDropDown = !!(dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown);
+  bool bRemoveDropDown = !!(dwStylesExRemoved & FWL_STYLEEXT_CMB_DropDown);
+  if (bAddDropDown && !m_pEdit) {
+    CFWL_WidgetImpProperties prop;
+    m_pEdit.reset(IFWL_ComboEdit::Create(prop, nullptr));
+    m_pEdit->Initialize();
+    m_pEdit->SetOuter(this);
+    m_pEdit->SetParent(this);
+  } else if (bRemoveDropDown && m_pEdit) {
+    m_pEdit->SetStates(FWL_WGTSTATE_Invisible, TRUE);
+  }
+  return IFWL_Widget::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+}
+
+FWL_Error IFWL_ComboBox::Update() {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_Update();
+  }
+  if (IsLocked()) {
+    return FWL_Error::Indefinite;
+  }
+  ReSetTheme();
+  FX_BOOL bDropDown = IsDropDownStyle();
+  if (bDropDown && m_pEdit) {
+    ReSetEditAlignment();
+  }
+  if (!m_pProperties->m_pThemeProvider) {
+    m_pProperties->m_pThemeProvider = GetAvailableTheme();
+  }
+  Layout();
+  CFWL_ThemePart part;
+  part.m_pWidget = this;
+  m_fComboFormHandler =
+      *static_cast<FX_FLOAT*>(m_pProperties->m_pThemeProvider->GetCapacity(
+          &part, CFWL_WidgetCapacity::ComboFormHandler));
+  return FWL_Error::Succeeded;
+}
+
+FWL_WidgetHit IFWL_ComboBox::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_HitTest(fx, fy);
+  }
+  return IFWL_Widget::HitTest(fx, fy);
+}
+
+FWL_Error IFWL_ComboBox::DrawWidget(CFX_Graphics* pGraphics,
+                                    const CFX_Matrix* pMatrix) {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_DrawWidget(pGraphics, pMatrix);
+  }
+  if (!pGraphics)
+    return FWL_Error::Indefinite;
+  if (!m_pProperties->m_pThemeProvider)
+    return FWL_Error::Indefinite;
+  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
+  FX_BOOL bIsDropDown = IsDropDownStyle();
+  if (HasBorder()) {
+    DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
+  }
+  if (HasEdge()) {
+    DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix);
+  }
+  if (!bIsDropDown) {
+    CFX_RectF rtTextBk(m_rtClient);
+    rtTextBk.width -= m_rtBtn.width;
+    CFWL_ThemeBackground param;
+    param.m_pWidget = this;
+    param.m_iPart = CFWL_Part::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*>(
+          m_pListBox->m_pProperties->m_pDataProvider);
+      void* p = pData->GetItemData(m_pListBox.get(),
+                                   pData->GetItem(m_pListBox.get(), m_iCurSel));
+      if (p) {
+        param.m_pData = p;
+      }
+    }
+    if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
+      param.m_dwStates = CFWL_PartState_Disabled;
+    } else if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) &&
+               (m_iCurSel >= 0)) {
+      param.m_dwStates = CFWL_PartState_Selected;
+    } else {
+      param.m_dwStates = CFWL_PartState_Normal;
+    }
+    pTheme->DrawBackground(&param);
+    if (m_iCurSel >= 0) {
+      if (!m_pListBox)
+        return FWL_Error::Indefinite;
+      CFX_WideString wsText;
+      IFWL_ComboBoxDP* pData =
+          static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+      IFWL_ListItem* hItem = pData->GetItem(this, m_iCurSel);
+      m_pListBox->GetItemText(hItem, wsText);
+      CFWL_ThemeText theme_text;
+      theme_text.m_pWidget = this;
+      theme_text.m_iPart = CFWL_Part::Caption;
+      theme_text.m_dwStates = m_iBtnState;
+      theme_text.m_pGraphics = pGraphics;
+      theme_text.m_matrix.Concat(*pMatrix);
+      theme_text.m_rtPart = rtTextBk;
+      theme_text.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)
+                                  ? CFWL_PartState_Selected
+                                  : CFWL_PartState_Normal;
+      theme_text.m_wsText = wsText;
+      theme_text.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
+      theme_text.m_iTTOAlign = FDE_TTOALIGNMENT_CenterLeft;
+      pTheme->DrawText(&theme_text);
+    }
+  }
+  {
+    CFWL_ThemeBackground param;
+    param.m_pWidget = this;
+    param.m_iPart = CFWL_Part::DropDownButton;
+    param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
+                           ? CFWL_PartState_Disabled
+                           : m_iBtnState;
+    param.m_pGraphics = pGraphics;
+    param.m_matrix.Concat(*pMatrix);
+    param.m_rtPart = m_rtBtn;
+    pTheme->DrawBackground(&param);
+  }
+  return FWL_Error::Succeeded;
+}
+
+FWL_Error IFWL_ComboBox::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
+  if (!pThemeProvider)
+    return FWL_Error::Indefinite;
+  m_pProperties->m_pThemeProvider = pThemeProvider;
+  if (m_pListBox)
+    m_pListBox->SetThemeProvider(pThemeProvider);
+  if (m_pEdit)
+    m_pEdit->SetThemeProvider(pThemeProvider);
+  return FWL_Error::Succeeded;
+}
+
+int32_t IFWL_ComboBox::GetCurSel() {
+  return m_iCurSel;
+}
+
+FWL_Error IFWL_ComboBox::SetCurSel(int32_t iSel) {
+  int32_t iCount = m_pListBox->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);
+      IFWL_ListItem* hItem = pData->GetItem(this, iSel);
+      m_pListBox->GetItemText(hItem, wsText);
+      m_pEdit->SetText(wsText);
+    }
+    m_pEdit->Update();
+  }
+  m_iCurSel = bClearSel ? -1 : iSel;
+  return FWL_Error::Succeeded;
+}
+
+void IFWL_ComboBox::SetStates(uint32_t 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);
+  IFWL_Widget::SetStates(dwStates, bSet);
+}
+
+FWL_Error IFWL_ComboBox::SetEditText(const CFX_WideString& wsText) {
+  if (!m_pEdit)
+    return FWL_Error::Indefinite;
+  m_pEdit->SetText(wsText);
+  return m_pEdit->Update();
+}
+
+int32_t IFWL_ComboBox::GetEditTextLength() const {
+  if (!m_pEdit)
+    return -1;
+  return m_pEdit->GetTextLength();
+}
+
+FWL_Error IFWL_ComboBox::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);
+    IFWL_ListItem* hItem = pData->GetItem(this, m_iCurSel);
+    return m_pListBox->GetItemText(hItem, wsText);
+  }
+  return FWL_Error::Indefinite;
+}
+
+FWL_Error IFWL_ComboBox::SetEditSelRange(int32_t nStart, int32_t nCount) {
+  if (!m_pEdit)
+    return FWL_Error::Indefinite;
+  m_pEdit->ClearSelected();
+  m_pEdit->AddSelRange(nStart, nCount);
+  return FWL_Error::Succeeded;
+}
+
+int32_t IFWL_ComboBox::GetEditSelRange(int32_t nIndex, int32_t& nStart) {
+  if (!m_pEdit)
+    return -1;
+  return m_pEdit->GetSelRange(nIndex, nStart);
+}
+
+int32_t IFWL_ComboBox::GetEditLimit() {
+  if (!m_pEdit)
+    return -1;
+  return m_pEdit->GetLimit();
+}
+
+FWL_Error IFWL_ComboBox::SetEditLimit(int32_t nLimit) {
+  if (!m_pEdit)
+    return FWL_Error::Indefinite;
+  return m_pEdit->SetLimit(nLimit);
+}
+
+FWL_Error IFWL_ComboBox::EditDoClipboard(int32_t iCmd) {
+  if (!m_pEdit)
+    return FWL_Error::Indefinite;
+  return m_pEdit->DoClipboard(iCmd);
+}
+
+FX_BOOL IFWL_ComboBox::EditRedo(const IFDE_TxtEdtDoRecord* pRecord) {
+  return m_pEdit && m_pEdit->Redo(pRecord);
+}
+
+FX_BOOL IFWL_ComboBox::EditUndo(const IFDE_TxtEdtDoRecord* pRecord) {
+  return m_pEdit && m_pEdit->Undo(pRecord);
+}
+
+IFWL_ListBox* IFWL_ComboBox::GetListBoxt() {
+  return m_pListBox.get();
+}
+
+FX_BOOL IFWL_ComboBox::AfterFocusShowDropList() {
+  if (!m_bNeedShowList) {
+    return FALSE;
+  }
+  if (m_pEdit) {
+    MatchEditText();
+  }
+  ShowDropList(TRUE);
+  m_bNeedShowList = FALSE;
+  return TRUE;
+}
+
+FWL_Error IFWL_ComboBox::OpenDropDownList(FX_BOOL bActivate) {
+  ShowDropList(bActivate);
+  return FWL_Error::Succeeded;
+}
+
+FX_BOOL IFWL_ComboBox::EditCanUndo() {
+  return m_pEdit->CanUndo();
+}
+
+FX_BOOL IFWL_ComboBox::EditCanRedo() {
+  return m_pEdit->CanRedo();
+}
+
+FX_BOOL IFWL_ComboBox::EditUndo() {
+  return m_pEdit->Undo();
+}
+
+FX_BOOL IFWL_ComboBox::EditRedo() {
+  return m_pEdit->Redo();
+}
+
+FX_BOOL IFWL_ComboBox::EditCanCopy() {
+  return m_pEdit->CountSelRanges() > 0;
+}
+
+FX_BOOL IFWL_ComboBox::EditCanCut() {
+  if (m_pEdit->GetStylesEx() & FWL_STYLEEXT_EDT_ReadOnly) {
+    return FALSE;
+  }
+  return m_pEdit->CountSelRanges() > 0;
+}
+
+FX_BOOL IFWL_ComboBox::EditCanSelectAll() {
+  return m_pEdit->GetTextLength() > 0;
+}
+
+FX_BOOL IFWL_ComboBox::EditCopy(CFX_WideString& wsCopy) {
+  return m_pEdit->Copy(wsCopy);
+}
+
+FX_BOOL IFWL_ComboBox::EditCut(CFX_WideString& wsCut) {
+  return m_pEdit->Cut(wsCut);
+}
+
+FX_BOOL IFWL_ComboBox::EditPaste(const CFX_WideString& wsPaste) {
+  return m_pEdit->Paste(wsPaste);
+}
+
+FX_BOOL IFWL_ComboBox::EditSelectAll() {
+  return m_pEdit->AddSelRange(0) == FWL_Error::Succeeded;
+}
+
+FX_BOOL IFWL_ComboBox::EditDelete() {
+  return m_pEdit->ClearText() == FWL_Error::Succeeded;
+}
+
+FX_BOOL IFWL_ComboBox::EditDeSelect() {
+  return m_pEdit->ClearSelections() == FWL_Error::Succeeded;
+}
+
+FWL_Error IFWL_ComboBox::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_Error::Succeeded;
+}
+
+FWL_Error IFWL_ComboBox::EditModifyStylesEx(uint32_t dwStylesExAdded,
+                                            uint32_t dwStylesExRemoved) {
+  if (!m_pEdit)
+    return FWL_Error::ParameterInvalid;
+  return m_pEdit->ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+}
+
+FX_FLOAT IFWL_ComboBox::GetListHeight() {
+  return static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider)
+      ->GetListHeight(this);
+}
+
+void IFWL_ComboBox::DrawStretchHandler(CFX_Graphics* pGraphics,
+                                       const CFX_Matrix* pMatrix) {
+  CFWL_ThemeBackground param;
+  param.m_pGraphics = pGraphics;
+  param.m_iPart = CFWL_Part::StretchHandler;
+  param.m_dwStates = CFWL_PartState_Normal;
+  param.m_pWidget = this;
+  if (pMatrix) {
+    param.m_matrix.Concat(*pMatrix);
+  }
+  param.m_rtPart = m_rtHandler;
+  m_pProperties->m_pThemeProvider->DrawBackground(&param);
+}
+
+void IFWL_ComboBox::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) {
+    m_pListBox->ChangeSelected(m_iCurSel);
+    ReSetListItemAlignment();
+    uint32_t 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(nullptr, 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 = this;
+    DispatchEvent(&ev);
+    m_fItemHeight = m_pListBox->m_fItemHeight;
+    m_pListBox->SetFocus(TRUE);
+    m_pForm->DoModal();
+    m_pListBox->SetFocus(FALSE);
+  } else {
+    m_pForm->EndDoModal();
+    CFWL_EvtCmbCloseUp ev;
+    ev.m_pSrcTarget = this;
+    DispatchEvent(&ev);
+    m_bLButtonDown = FALSE;
+    m_pListBox->m_bNotifyOwner = TRUE;
+    SetFocus(TRUE);
+  }
+}
+
+FX_BOOL IFWL_ComboBox::IsDropListShowed() {
+  return m_pForm && !(m_pForm->GetStates() & FWL_WGTSTATE_Invisible);
+}
+
+FX_BOOL IFWL_ComboBox::IsDropDownStyle() const {
+  return m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_DropDown;
+}
+
+void IFWL_ComboBox::MatchEditText() {
+  CFX_WideString wsText;
+  m_pEdit->GetText(wsText);
+  int32_t iMatch = m_pListBox->MatchItem(wsText);
+  if (iMatch != m_iCurSel) {
+    m_pListBox->ChangeSelected(iMatch);
+    if (iMatch >= 0) {
+      SynchrEditText(iMatch);
+    }
+  } else if (iMatch >= 0) {
+    m_pEdit->SetSelected();
+  }
+  m_iCurSel = iMatch;
+}
+
+void IFWL_ComboBox::SynchrEditText(int32_t iListItem) {
+  CFX_WideString wsText;
+  IFWL_ComboBoxDP* pData =
+      static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+  IFWL_ListItem* hItem = pData->GetItem(this, iListItem);
+  m_pListBox->GetItemText(hItem, wsText);
+  m_pEdit->SetText(wsText);
+  m_pEdit->Update();
+  m_pEdit->SetSelected();
+}
+
+void IFWL_ComboBox::Layout() {
+  if (m_pWidgetMgr->IsFormDisabled()) {
+    return DisForm_Layout();
+  }
+  GetClientRect(m_rtClient);
+  FX_FLOAT* pFWidth = static_cast<FX_FLOAT*>(
+      GetThemeCapacity(CFWL_WidgetCapacity::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);
+      IFWL_ListItem* hItem = pData->GetItem(this, m_iCurSel);
+      m_pListBox->GetItemText(hItem, wsText);
+      m_pEdit->LockUpdate();
+      m_pEdit->SetText(wsText);
+      m_pEdit->UnlockUpdate();
+    }
+    m_pEdit->Update();
+  }
+}
+
+void IFWL_ComboBox::ReSetTheme() {
+  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
+  if (!pTheme) {
+    pTheme = GetAvailableTheme();
+    m_pProperties->m_pThemeProvider = pTheme;
+  }
+  if (m_pListBox && !m_pListBox->GetThemeProvider())
+    m_pListBox->SetThemeProvider(pTheme);
+  if (m_pEdit && !m_pEdit->GetThemeProvider())
+    m_pEdit->SetThemeProvider(pTheme);
+}
+
+void IFWL_ComboBox::ReSetEditAlignment() {
+  if (!m_pEdit)
+    return;
+  uint32_t dwStylExes = m_pProperties->m_dwStyleExes;
+  uint32_t 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 IFWL_ComboBox::ReSetListItemAlignment() {
+  if (!m_pListBox)
+    return;
+  uint32_t dwStylExes = m_pProperties->m_dwStyleExes;
+  uint32_t 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 IFWL_ComboBox::ProcessSelChanged(FX_BOOL bLButtonUp) {
+  IFWL_ComboBoxDP* pDatas =
+      static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+  m_iCurSel = pDatas->GetItemIndex(this, m_pListBox->GetSelItem(0));
+  FX_BOOL bDropDown = IsDropDownStyle();
+  if (bDropDown) {
+    IFWL_ComboBoxDP* pData =
+        static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
+    IFWL_ListItem* hItem = pData->GetItem(this, m_iCurSel);
+    if (hItem) {
+      CFX_WideString wsText;
+      pData->GetItemText(this, hItem, wsText);
+      if (m_pEdit) {
+        m_pEdit->SetText(wsText);
+        m_pEdit->Update();
+        m_pEdit->SetSelected();
+      }
+      CFWL_EvtCmbSelChanged ev;
+      ev.bLButtonUp = bLButtonUp;
+      ev.m_pSrcTarget = this;
+      ev.iArraySels.Add(m_iCurSel);
+      DispatchEvent(&ev);
+    }
+  } else {
+    Repaint(&m_rtClient);
+  }
+}
+
+void IFWL_ComboBox::InitProxyForm() {
+  if (m_pForm)
+    return;
+  if (!m_pListBox)
+    return;
+
+  CFWL_WidgetImpProperties propForm;
+  propForm.m_pOwner = this;
+  propForm.m_dwStyles = FWL_WGTSTYLE_Popup;
+  propForm.m_dwStates = FWL_WGTSTATE_Invisible;
+  m_pForm = IFWL_FormProxy::Create(propForm, m_pListBox.get());
+  m_pForm->Initialize();
+  m_pListBox->SetParent(m_pForm);
+  m_pListProxyDelegate = new CFWL_ComboProxyImpDelegate(m_pForm, this);
+  m_pForm->SetDelegate(m_pListProxyDelegate);
+}
+
+FWL_Error IFWL_ComboBox::DisForm_Initialize() {
+  if (IFWL_Widget::Initialize() != FWL_Error::Succeeded)
+    return FWL_Error::Indefinite;
+
+  m_pDelegate = new CFWL_ComboBoxImpDelegate(this);
+  DisForm_InitComboList();
+  DisForm_InitComboEdit();
+  return FWL_Error::Succeeded;
+}
+
+void IFWL_ComboBox::DisForm_InitComboList() {
+  if (m_pListBox)
+    return;
+
+  CFWL_WidgetImpProperties prop;
+  prop.m_pParent = this;
+  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_ComboList::Create(prop, this));
+  m_pListBox->Initialize();
+}
+
+void IFWL_ComboBox::DisForm_InitComboEdit() {
+  if (m_pEdit) {
+    return;
+  }
+  CFWL_WidgetImpProperties prop;
+  prop.m_pParent = this;
+  prop.m_pThemeProvider = m_pProperties->m_pThemeProvider;
+  m_pEdit.reset(IFWL_ComboEdit::Create(prop, this));
+  m_pEdit->Initialize();
+  m_pEdit->SetOuter(this);
+}
+
+void IFWL_ComboBox::DisForm_ShowDropList(FX_BOOL bActivate) {
+  FX_BOOL bDropList = DisForm_IsDropListShowed();
+  if (bDropList == bActivate) {
+    return;
+  }
+  if (bActivate) {
+    CFWL_EvtCmbPreDropDown preEvent;
+    preEvent.m_pSrcTarget = this;
+    DispatchEvent(&preEvent);
+    IFWL_ComboList* pComboList = m_pListBox.get();
+    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 = this;
+    DispatchEvent(&postEvent);
+  }
+  CFX_RectF rect;
+  m_pListBox->GetWidgetRect(rect);
+  rect.Inflate(2, 2);
+  Repaint(&rect);
+}
+
+FX_BOOL IFWL_ComboBox::DisForm_IsDropListShowed() {
+  return !(m_pListBox->GetStates() & FWL_WGTSTATE_Invisible);
+}
+
+FWL_Error IFWL_ComboBox::DisForm_ModifyStylesEx(uint32_t dwStylesExAdded,
+                                                uint32_t dwStylesExRemoved) {
+  if (!m_pEdit) {
+    DisForm_InitComboEdit();
+  }
+  bool bAddDropDown = !!(dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown);
+  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 IFWL_Widget::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
+}
+
+FWL_Error IFWL_ComboBox::DisForm_Update() {
+  if (m_iLock) {
+    return FWL_Error::Indefinite;
+  }
+  if (m_pEdit) {
+    ReSetEditAlignment();
+  }
+  ReSetTheme();
+  Layout();
+  return FWL_Error::Succeeded;
+}
+
+FWL_WidgetHit IFWL_ComboBox::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_WidgetHit::Edit;
+  if (m_rtBtn.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
+  if (DisForm_IsDropListShowed()) {
+    m_pListBox->GetWidgetRect(rect);
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::Client;
+  }
+  return FWL_WidgetHit::Unknown;
+}
+
+FWL_Error IFWL_ComboBox::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 = this;
+    param.m_iPart = CFWL_Part::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_Error::Succeeded;
+}
+
+FWL_Error IFWL_ComboBox::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_Error::Succeeded;
+}
+
+void IFWL_ComboBox::DisForm_Layout() {
+  GetClientRect(m_rtClient);
+  m_rtContent = m_rtClient;
+  FX_FLOAT* pFWidth = static_cast<FX_FLOAT*>(
+      GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
+  if (!pFWidth)
+    return;
+  FX_FLOAT borderWidth = 1;
+  FX_FLOAT fBtn = *pFWidth;
+  if (!(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(CFWL_WidgetCapacity::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);
+      IFWL_ListItem* hItem = pData->GetItem(this, m_iCurSel);
+      m_pListBox->GetItemText(hItem, wsText);
+      m_pEdit->LockUpdate();
+      m_pEdit->SetText(wsText);
+      m_pEdit->UnlockUpdate();
+    }
+    m_pEdit->Update();
+  }
+}
+
+CFWL_ComboBoxImpDelegate::CFWL_ComboBoxImpDelegate(IFWL_ComboBox* pOwner)
+    : m_pOwner(pOwner) {}
+
+void CFWL_ComboBoxImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
+  if (m_pOwner->m_pWidgetMgr->IsFormDisabled()) {
+    DisForm_OnProcessMessage(pMessage);
+    return;
+  }
+  if (!pMessage)
+    return;
+
+  switch (pMessage->GetClassID()) {
+    case CFWL_MessageType::SetFocus: {
+      OnFocusChanged(pMessage, TRUE);
+      break;
+    }
+    case CFWL_MessageType::KillFocus: {
+      OnFocusChanged(pMessage, FALSE);
+      break;
+    }
+    case CFWL_MessageType::Mouse: {
+      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
+      switch (pMsg->m_dwCmd) {
+        case FWL_MouseCommand::LeftButtonDown: {
+          OnLButtonDown(pMsg);
+          break;
+        }
+        case FWL_MouseCommand::LeftButtonUp: {
+          OnLButtonUp(pMsg);
+          break;
+        }
+        case FWL_MouseCommand::Move: {
+          OnMouseMove(pMsg);
+          break;
+        }
+        case FWL_MouseCommand::Leave: {
+          OnMouseLeave(pMsg);
+          break;
+        }
+        default:
+          break;
+      }
+      break;
+    }
+    case CFWL_MessageType::Key: {
+      OnKey(static_cast<CFWL_MsgKey*>(pMessage));
+      break;
+    }
+    default: { break; }
+  }
+
+  CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
+}
+
+void CFWL_ComboBoxImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {
+  CFWL_EventType dwFlag = pEvent->GetClassID();
+  if (dwFlag == CFWL_EventType::DrawItem) {
+    CFWL_EvtLtbDrawItem* pDrawItemEvent =
+        static_cast<CFWL_EvtLtbDrawItem*>(pEvent);
+    CFWL_EvtCmbDrawItem pTemp;
+    pTemp.m_pSrcTarget = m_pOwner;
+    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 == CFWL_EventType::Scroll) {
+    CFWL_EvtScroll* pScrollEvent = static_cast<CFWL_EvtScroll*>(pEvent);
+    CFWL_EvtScroll pScrollEv;
+    pScrollEv.m_pSrcTarget = m_pOwner;
+    pScrollEv.m_iScrollCode = pScrollEvent->m_iScrollCode;
+    pScrollEv.m_fPos = pScrollEvent->m_fPos;
+    m_pOwner->DispatchEvent(&pScrollEv);
+  } else if (dwFlag == CFWL_EventType::TextChanged) {
+    CFWL_EvtEdtTextChanged* pTextChangedEvent =
+        static_cast<CFWL_EvtEdtTextChanged*>(pEvent);
+    CFWL_EvtCmbEditChanged pTemp;
+    pTemp.m_pSrcTarget = m_pOwner;
+    pTemp.wsInsert = pTextChangedEvent->wsInsert;
+    pTemp.wsDelete = pTextChangedEvent->wsDelete;
+    pTemp.nChangeType = pTextChangedEvent->nChangeType;
+    m_pOwner->DispatchEvent(&pTemp);
+  }
+}
+
+void CFWL_ComboBoxImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
+                                            const CFX_Matrix* pMatrix) {
+  m_pOwner->DrawWidget(pGraphics, pMatrix);
+}
+
+void CFWL_ComboBoxImpDelegate::OnFocusChanged(CFWL_Message* pMsg,
+                                              FX_BOOL bSet) {
+  IFWL_Widget* pDstTarget = pMsg->m_pDstTarget;
+  IFWL_Widget* 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;
+      m_pOwner->m_pEdit->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;
+      m_pOwner->m_pEdit->FlagFocus(FALSE);
+      m_pOwner->m_pEdit->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 = CFWL_PartState_Pressed;
+    m_pOwner->Repaint(&m_pOwner->m_rtClient);
+    m_pOwner->ShowDropList(TRUE);
+    m_pOwner->m_iBtnState = CFWL_PartState_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 = CFWL_PartState_Hovered;
+  } else {
+    m_pOwner->m_iBtnState = CFWL_PartState_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 ? CFWL_PartState_Pressed
+                                                     : CFWL_PartState_Hovered;
+  } else {
+    m_pOwner->m_iBtnState = CFWL_PartState_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 = CFWL_PartState_Normal;
+    m_pOwner->Repaint(&m_pOwner->m_rtBtn);
+  }
+}
+
+void CFWL_ComboBoxImpDelegate::OnKey(CFWL_MsgKey* pMsg) {
+  uint32_t dwKeyCode = pMsg->m_dwKeyCode;
+  if (dwKeyCode == FWL_VKEY_Tab) {
+    m_pOwner->DispatchKeyEvent(pMsg);
+    return;
+  }
+  if (pMsg->m_pDstTarget == m_pOwner)
+    DoSubCtrlKey(pMsg);
+}
+
+void CFWL_ComboBoxImpDelegate::DoSubCtrlKey(CFWL_MsgKey* pMsg) {
+  uint32_t dwKeyCode = pMsg->m_dwKeyCode;
+  const bool bUp = dwKeyCode == FWL_VKEY_Up;
+  const bool bDown = dwKeyCode == FWL_VKEY_Down;
+  if (bUp || bDown) {
+    int32_t iCount = m_pOwner->m_pListBox->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 = m_pOwner->m_pListBox->MatchItem(wsText);
+      if (iCurSel >= 0) {
+        CFX_WideString wsTemp;
+        IFWL_ComboBoxDP* pData = static_cast<IFWL_ComboBoxDP*>(
+            m_pOwner->m_pProperties->m_pDataProvider);
+        IFWL_ListItem* hItem = pData->GetItem(m_pOwner, iCurSel);
+        m_pOwner->m_pListBox->GetItemText(hItem, wsTemp);
+        bMatchEqual = wsText == 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(nullptr);
+    pDelegate->OnProcessMessage(pMsg);
+  }
+}
+
+void CFWL_ComboBoxImpDelegate::DisForm_OnProcessMessage(
+    CFWL_Message* pMessage) {
+  if (!pMessage)
+    return;
+
+  FX_BOOL backDefault = TRUE;
+  switch (pMessage->GetClassID()) {
+    case CFWL_MessageType::SetFocus: {
+      backDefault = FALSE;
+      DisForm_OnFocusChanged(pMessage, TRUE);
+      break;
+    }
+    case CFWL_MessageType::KillFocus: {
+      backDefault = FALSE;
+      DisForm_OnFocusChanged(pMessage, FALSE);
+      break;
+    }
+    case CFWL_MessageType::Mouse: {
+      backDefault = FALSE;
+      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
+      switch (pMsg->m_dwCmd) {
+        case FWL_MouseCommand::LeftButtonDown: {
+          DisForm_OnLButtonDown(pMsg);
+          break;
+        }
+        case FWL_MouseCommand::LeftButtonUp: {
+          OnLButtonUp(pMsg);
+          break;
+        }
+        default:
+          break;
+      }
+      break;
+    }
+    case CFWL_MessageType::Key: {
+      backDefault = FALSE;
+      CFWL_MsgKey* pKey = static_cast<CFWL_MsgKey*>(pMessage);
+      if (pKey->m_dwCmd == FWL_KeyCommand::KeyUp)
+        break;
+      if (m_pOwner->DisForm_IsDropListShowed() &&
+          pKey->m_dwCmd == FWL_KeyCommand::KeyDown) {
+        FX_BOOL bListKey = pKey->m_dwKeyCode == FWL_VKEY_Up ||
+                           pKey->m_dwKeyCode == FWL_VKEY_Down ||
+                           pKey->m_dwKeyCode == FWL_VKEY_Return ||
+                           pKey->m_dwKeyCode == FWL_VKEY_Escape;
+        if (bListKey) {
+          IFWL_WidgetDelegate* pDelegate =
+              m_pOwner->m_pListBox->SetDelegate(nullptr);
+          pDelegate->OnProcessMessage(pMessage);
+          break;
+        }
+      }
+      DisForm_OnKey(pKey);
+      break;
+    }
+    default:
+      break;
+  }
+  if (backDefault)
+    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 = nullptr;
+      IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(nullptr);
+      pDelegate->OnProcessMessage(&msg);
+    }
+  } else {
+    m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
+    m_pOwner->DisForm_ShowDropList(FALSE);
+    CFWL_MsgKillFocus msg;
+    msg.m_pDstTarget = nullptr;
+    msg.m_pSrcTarget = m_pOwner->m_pEdit.get();
+    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(nullptr);
+    pDelegate->OnProcessMessage(&msg);
+  }
+}
+
+void CFWL_ComboBoxImpDelegate::DisForm_OnKey(CFWL_MsgKey* pMsg) {
+  uint32_t dwKeyCode = pMsg->m_dwKeyCode;
+  const bool bUp = dwKeyCode == FWL_VKEY_Up;
+  const bool bDown = dwKeyCode == FWL_VKEY_Down;
+  if (bUp || bDown) {
+    IFWL_ComboList* pComboList = m_pOwner->m_pListBox.get();
+    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;
+        IFWL_ListItem* item = m_pOwner->m_pListBox->GetSelItem(iCurSel);
+        m_pOwner->m_pListBox->GetItemText(item, wsTemp);
+        bMatchEqual = wsText == 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(nullptr);
+    pDelegate->OnProcessMessage(pMsg);
+  }
+}
+
+CFWL_ComboProxyImpDelegate::CFWL_ComboProxyImpDelegate(IFWL_Form* pForm,
+                                                       IFWL_ComboBox* pComboBox)
+    : m_bLButtonDown(FALSE),
+      m_bLButtonUpSelf(FALSE),
+      m_fStartPos(0),
+      m_pForm(pForm),
+      m_pComboBox(pComboBox) {}
+
+void CFWL_ComboProxyImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
+  if (!pMessage)
+    return;
+
+  switch (pMessage->GetClassID()) {
+    case CFWL_MessageType::Mouse: {
+      CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
+      switch (pMsg->m_dwCmd) {
+        case FWL_MouseCommand::LeftButtonDown: {
+          OnLButtonDown(pMsg);
+          break;
+        }
+        case FWL_MouseCommand::LeftButtonUp: {
+          OnLButtonUp(pMsg);
+          break;
+        }
+        case FWL_MouseCommand::Move: {
+          OnMouseMove(pMsg);
+          break;
+        }
+        default:
+          break;
+      }
+      break;
+    }
+    case CFWL_MessageType::Deactivate: {
+      OnDeactive(static_cast<CFWL_MsgDeactivate*>(pMessage));
+      break;
+    }
+    case CFWL_MessageType::KillFocus: {
+      OnFocusChanged(static_cast<CFWL_MsgKillFocus*>(pMessage), FALSE);
+      break;
+    }
+    case CFWL_MessageType::SetFocus: {
+      OnFocusChanged(static_cast<CFWL_MsgKillFocus*>(pMessage), TRUE);
+      break;
+    }
+    default:
+      break;
+  }
+  CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
+}
+
+void CFWL_ComboProxyImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
+                                              const CFX_Matrix* pMatrix) {
+  m_pComboBox->DrawStretchHandler(pGraphics, pMatrix);
+}
+
+void CFWL_ComboProxyImpDelegate::OnLButtonDown(CFWL_MsgMouse* pMsg) {
+  IFWL_App* pApp = m_pForm->GetOwnerApp();
+  if (!pApp)
+    return;
+
+  CFWL_NoteDriver* pDriver =
+      static_cast<CFWL_NoteDriver*>(pApp->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);
+  }
+}
+
+void CFWL_ComboProxyImpDelegate::OnLButtonUp(CFWL_MsgMouse* pMsg) {
+  m_bLButtonDown = FALSE;
+  IFWL_App* pApp = m_pForm->GetOwnerApp();
+  if (!pApp)
+    return;
+
+  CFWL_NoteDriver* pDriver =
+      static_cast<CFWL_NoteDriver*>(pApp->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) {}
+
+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) {
+      m_pComboBox->ShowDropList(FALSE);
+    }
+  }
+}