Remove xfa/src/fwl/src and move code up a level.

This Cl moves the xfa/src/fwl/src code up to the previously empty parent
directory and removes xfa/src/fwl/src.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1770953004 .

1 files changed, 1241 insertions, 0 deletions

diff --git a/xfa/src/fwl/basewidget/fwl_listboximp.cpp b/xfa/src/fwl/basewidget/fwl_listboximp.cpp
new file mode 100644
index 0000000000..26b27e8637
--- /dev/null
+++ b/xfa/src/fwl/basewidget/fwl_listboximp.cpp
@@ -0,0 +1,1241 @@
+// 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/fwl/basewidget/fwl_listboximp.h"
+
+#include "xfa/include/fwl/core/fwl_theme.h"
+#include "xfa/src/fdp/include/fde_tto.h"
+#include "xfa/src/fwl/basewidget/fwl_comboboximp.h"
+#include "xfa/src/fwl/basewidget/fwl_scrollbarimp.h"
+#include "xfa/src/fwl/core/fwl_noteimp.h"
+#include "xfa/src/fwl/core/fwl_targetimp.h"
+#include "xfa/src/fwl/core/fwl_widgetimp.h"
+
+#define FWL_LISTBOX_ItemTextMargin 2
+
+// static
+IFWL_ListBox* IFWL_ListBox::Create(const CFWL_WidgetImpProperties& properties,
+                                   IFWL_Widget* pOuter) {
+  IFWL_ListBox* pListBox = new IFWL_ListBox;
+  CFWL_ListBoxImp* pListBoxImpl = new CFWL_ListBoxImp(properties, pOuter);
+  pListBox->SetImpl(pListBoxImpl);
+  pListBoxImpl->SetInterface(pListBox);
+  return pListBox;
+}
+// static
+IFWL_ListBox* IFWL_ListBox::CreateComboList(
+    const CFWL_WidgetImpProperties& properties,
+    IFWL_Widget* pOuter) {
+  IFWL_ListBox* pListBox = new IFWL_ListBox;
+  CFWL_ListBoxImp* pComboListImpl = new CFWL_ComboListImp(properties, pOuter);
+  pListBox->SetImpl(pComboListImpl);
+  pComboListImpl->SetInterface(pListBox);
+  return pListBox;
+}
+IFWL_ListBox::IFWL_ListBox() {}
+int32_t IFWL_ListBox::CountSelItems() {
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->CountSelItems();
+}
+FWL_HLISTITEM IFWL_ListBox::GetSelItem(int32_t nIndexSel) {
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetSelItem(nIndexSel);
+}
+int32_t IFWL_ListBox::GetSelIndex(int32_t nIndex) {
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetSelIndex(nIndex);
+}
+FWL_ERR IFWL_ListBox::SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect) {
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->SetSelItem(hItem, bSelect);
+}
+FWL_ERR IFWL_ListBox::GetItemText(FWL_HLISTITEM hItem, CFX_WideString& wsText) {
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetItemText(hItem, wsText);
+}
+FWL_ERR IFWL_ListBox::GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert) {
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetScrollPos(fPos, bVert);
+}
+FWL_ERR* IFWL_ListBox::Sort(IFWL_ListBoxCompare* pCom) {
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->Sort(pCom);
+}
+
+CFWL_ListBoxImp::CFWL_ListBoxImp(const CFWL_WidgetImpProperties& properties,
+                                 IFWL_Widget* pOuter)
+    : CFWL_WidgetImp(properties, pOuter),
+      m_dwTTOStyles(0),
+      m_iTTOAligns(0),
+      m_hAnchor(NULL),
+      m_fScorllBarWidth(0),
+      m_bLButtonDown(FALSE),
+      m_pScrollBarTP(NULL) {
+  m_rtClient.Reset();
+  m_rtConent.Reset();
+  m_rtStatic.Reset();
+}
+CFWL_ListBoxImp::~CFWL_ListBoxImp() {}
+FWL_ERR CFWL_ListBoxImp::GetClassName(CFX_WideString& wsClass) const {
+  wsClass = FWL_CLASS_ListBox;
+  return FWL_ERR_Succeeded;
+}
+FX_DWORD CFWL_ListBoxImp::GetClassID() const {
+  return FWL_CLASSHASH_ListBox;
+}
+FWL_ERR CFWL_ListBoxImp::Initialize() {
+  if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
+    return FWL_ERR_Indefinite;
+  m_pDelegate = new CFWL_ListBoxImpDelegate(this);
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ListBoxImp::Finalize() {
+  if (m_pVertScrollBar) {
+    m_pVertScrollBar->Finalize();
+  }
+  if (m_pHorzScrollBar) {
+    m_pHorzScrollBar->Finalize();
+  }
+  delete m_pDelegate;
+  m_pDelegate = nullptr;
+  return CFWL_WidgetImp::Finalize();
+}
+FWL_ERR CFWL_ListBoxImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
+  if (bAutoSize) {
+    rect.Set(0, 0, 0, 0);
+    if (!m_pProperties->m_pThemeProvider) {
+      m_pProperties->m_pThemeProvider = GetAvailableTheme();
+    }
+    CFX_SizeF fs = CalcSize(TRUE);
+    rect.Set(0, 0, fs.x, fs.y);
+    CFWL_WidgetImp::GetWidgetRect(rect, TRUE);
+  } else {
+    rect = m_pProperties->m_rtWidget;
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ListBoxImp::Update() {
+  if (IsLocked()) {
+    return FWL_ERR_Indefinite;
+  }
+  if (!m_pProperties->m_pThemeProvider) {
+    m_pProperties->m_pThemeProvider = GetAvailableTheme();
+  }
+  m_iTTOAligns = FDE_TTOALIGNMENT_Center;
+  switch (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_AlignMask) {
+    case FWL_STYLEEXT_LTB_LeftAlign: {
+      m_iTTOAligns = FDE_TTOALIGNMENT_CenterLeft;
+      break;
+    }
+    case FWL_STYLEEXT_LTB_RightAlign: {
+      m_iTTOAligns = FDE_TTOALIGNMENT_CenterRight;
+      break;
+    }
+    case FWL_STYLEEXT_LTB_CenterAlign:
+    default: { m_iTTOAligns = FDE_TTOALIGNMENT_Center; }
+  }
+  if (m_pProperties->m_dwStyleExes & FWL_WGTSTYLE_RTLReading) {
+    m_dwTTOStyles |= FDE_TTOSTYLE_RTL;
+  }
+  m_dwTTOStyles |= FDE_TTOSTYLE_SingleLine;
+  m_fScorllBarWidth = GetScrollWidth();
+  SortItem();
+  CalcSize();
+  return FWL_ERR_Succeeded;
+}
+FX_DWORD CFWL_ListBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  if (IsShowScrollBar(FALSE)) {
+    CFX_RectF rect;
+    m_pHorzScrollBar->GetWidgetRect(rect);
+    if (rect.Contains(fx, fy)) {
+      return FWL_WGTHITTEST_HScrollBar;
+    }
+  }
+  if (IsShowScrollBar(TRUE)) {
+    CFX_RectF rect;
+    m_pVertScrollBar->GetWidgetRect(rect);
+    if (rect.Contains(fx, fy)) {
+      return FWL_WGTHITTEST_VScrollBar;
+    }
+  }
+  if (m_rtClient.Contains(fx, fy)) {
+    return FWL_WGTHITTEST_Client;
+  }
+  return FWL_WGTHITTEST_Unknown;
+}
+FWL_ERR CFWL_ListBoxImp::DrawWidget(CFX_Graphics* pGraphics,
+                                    const CFX_Matrix* pMatrix) {
+  if (!pGraphics)
+    return FWL_ERR_Indefinite;
+  if (!m_pProperties->m_pThemeProvider)
+    return FWL_ERR_Indefinite;
+  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
+  pGraphics->SaveGraphState();
+  if (HasBorder()) {
+    DrawBorder(pGraphics, FWL_PART_LTB_Border, pTheme, pMatrix);
+  }
+  if (HasEdge()) {
+    DrawEdge(pGraphics, FWL_PART_LTB_Edge, pTheme, pMatrix);
+  }
+  CFX_RectF rtClip(m_rtConent);
+  if (IsShowScrollBar(FALSE)) {
+    rtClip.height -= m_fScorllBarWidth;
+  }
+  if (IsShowScrollBar(TRUE)) {
+    rtClip.width -= m_fScorllBarWidth;
+  }
+  if (pMatrix) {
+    pMatrix->TransformRect(rtClip);
+  }
+  pGraphics->SetClipRect(rtClip);
+  if ((m_pProperties->m_dwStyles & FWL_WGTSTYLE_NoBackground) == 0) {
+    DrawBkground(pGraphics, pTheme, pMatrix);
+  }
+  DrawItems(pGraphics, pTheme, pMatrix);
+  pGraphics->RestoreGraphState();
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ListBoxImp::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
+  if (!pThemeProvider)
+    return FWL_ERR_Indefinite;
+  if (!pThemeProvider->IsValidWidget(m_pInterface)) {
+    m_pScrollBarTP = pThemeProvider;
+    return FWL_ERR_Succeeded;
+  }
+  m_pProperties->m_pThemeProvider = pThemeProvider;
+  return FWL_ERR_Succeeded;
+}
+int32_t CFWL_ListBoxImp::CountSelItems() {
+  if (!m_pProperties->m_pDataProvider)
+    return 0;
+  int32_t iRet = 0;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t iCount = pData->CountItems(m_pInterface);
+  for (int32_t i = 0; i < iCount; i++) {
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+    if (!hItem) {
+      continue;
+    }
+    FX_DWORD dwStyle = pData->GetItemStyles(m_pInterface, hItem);
+    if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
+      iRet++;
+    }
+  }
+  return iRet;
+}
+FWL_HLISTITEM CFWL_ListBoxImp::GetSelItem(int32_t nIndexSel) {
+  if (!m_pProperties->m_pDataProvider)
+    return NULL;
+  int32_t index = 0;
+  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);
+    if (!hItem) {
+      return NULL;
+    }
+    FX_DWORD dwStyle = pData->GetItemStyles(m_pInterface, hItem);
+    if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
+      if (index == nIndexSel) {
+        return hItem;
+      } else {
+        index++;
+      }
+    }
+  }
+  return NULL;
+}
+int32_t CFWL_ListBoxImp::GetSelIndex(int32_t nIndex) {
+  if (!m_pProperties->m_pDataProvider)
+    return -1;
+  int32_t index = 0;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t iCount = pData->CountItems(m_pInterface);
+  for (int32_t i = 0; i < iCount; i++) {
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+    if (!hItem) {
+      return -1;
+    }
+    FX_DWORD dwStyle = pData->GetItemStyles(m_pInterface, hItem);
+    if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
+      if (index == nIndex) {
+        return i;
+      } else {
+        index++;
+      }
+    }
+  }
+  return -1;
+}
+FWL_ERR CFWL_ListBoxImp::SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect) {
+  if (!m_pProperties->m_pDataProvider)
+    return FWL_ERR_Indefinite;
+  if (!hItem) {
+    if (bSelect) {
+      SelectAll();
+    } else {
+      ClearSelection();
+      SetFocusItem(NULL);
+    }
+    return FWL_ERR_Indefinite;
+  }
+  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection) {
+    SetSelectionDirect(hItem, bSelect);
+  } else {
+    SetSelection(hItem, hItem, bSelect);
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ListBoxImp::GetItemText(FWL_HLISTITEM hItem,
+                                     CFX_WideString& wsText) {
+  if (!m_pProperties->m_pDataProvider)
+    return FWL_ERR_Indefinite;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  if (!hItem)
+    return FWL_ERR_Indefinite;
+  pData->GetItemText(m_pInterface, hItem, wsText);
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ListBoxImp::GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert) {
+  if ((bVert && IsShowScrollBar(TRUE)) || (!bVert && IsShowScrollBar(FALSE))) {
+    IFWL_ScrollBar* pScrollBar =
+        bVert ? m_pVertScrollBar.get() : m_pHorzScrollBar.get();
+    fPos = pScrollBar->GetPos();
+    return FWL_ERR_Succeeded;
+  }
+  return FWL_ERR_Indefinite;
+}
+FWL_ERR* CFWL_ListBoxImp::Sort(IFWL_ListBoxCompare* pCom) {
+  FWL_HLISTITEM hTemp;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t sz = pData->CountItems(m_pInterface);
+  for (int32_t i = 0; i < sz - 1; i++) {
+    for (int32_t j = i + 1; j < sz; j++) {
+      if (pCom->Compare(pData->GetItem(m_pInterface, i),
+                        pData->GetItem(m_pInterface, j)) > 0) {
+        hTemp = pData->GetItem(m_pInterface, i);
+        pData->SetItemIndex(m_pInterface, pData->GetItem(m_pInterface, j), i);
+        pData->SetItemIndex(m_pInterface, hTemp, j);
+      }
+    }
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_HLISTITEM CFWL_ListBoxImp::GetItem(FWL_HLISTITEM hItem,
+                                       FX_DWORD dwKeyCode) {
+  FWL_HLISTITEM hRet = NULL;
+  switch (dwKeyCode) {
+    case FWL_VKEY_Up:
+    case FWL_VKEY_Down:
+    case FWL_VKEY_Home:
+    case FWL_VKEY_End: {
+      const bool bUp = dwKeyCode == FWL_VKEY_Up;
+      const bool bDown = dwKeyCode == FWL_VKEY_Down;
+      const bool bHome = dwKeyCode == FWL_VKEY_Home;
+      IFWL_ListBoxDP* pData =
+          static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+      int32_t iDstItem = -1;
+      if (bUp || bDown) {
+        int32_t index = pData->GetItemIndex(m_pInterface, hItem);
+        iDstItem = dwKeyCode == FWL_VKEY_Up ? index - 1 : index + 1;
+      } else if (bHome) {
+        iDstItem = 0;
+      } else {
+        int32_t iCount = pData->CountItems(m_pInterface);
+        iDstItem = iCount - 1;
+      }
+      hRet = pData->GetItem(m_pInterface, iDstItem);
+      break;
+    }
+    default: {}
+  }
+  return hRet;
+}
+void CFWL_ListBoxImp::SetSelection(FWL_HLISTITEM hStart,
+                                   FWL_HLISTITEM hEnd,
+                                   FX_BOOL bSelected) {
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t iStart = pData->GetItemIndex(m_pInterface, hStart);
+  int32_t iEnd = pData->GetItemIndex(m_pInterface, hEnd);
+  if (iStart > iEnd) {
+    int32_t iTemp = iStart;
+    iStart = iEnd;
+    iEnd = iTemp;
+  }
+  if (bSelected) {
+    int32_t iCount = pData->CountItems(m_pInterface);
+    for (int32_t i = 0; i < iCount; i++) {
+      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+      SetSelectionDirect(hItem, FALSE);
+    }
+  }
+  for (; iStart <= iEnd; iStart++) {
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iStart);
+    SetSelectionDirect(hItem, bSelected);
+  }
+}
+void CFWL_ListBoxImp::SetSelectionDirect(FWL_HLISTITEM hItem, FX_BOOL bSelect) {
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  FX_DWORD dwOldStyle = pData->GetItemStyles(m_pInterface, hItem);
+  bSelect ? dwOldStyle |= FWL_ITEMSTATE_LTB_Selected
+          : dwOldStyle &= ~FWL_ITEMSTATE_LTB_Selected;
+  pData->SetItemStyles(m_pInterface, hItem, dwOldStyle);
+}
+FX_BOOL CFWL_ListBoxImp::IsItemSelected(FWL_HLISTITEM hItem) {
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  FX_DWORD dwState = pData->GetItemStyles(m_pInterface, hItem);
+  return (dwState & FWL_ITEMSTATE_LTB_Selected) != 0;
+}
+void CFWL_ListBoxImp::ClearSelection() {
+  FX_BOOL bMulti =
+      m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t iCount = pData->CountItems(m_pInterface);
+  for (int32_t i = 0; i < iCount; i++) {
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+    FX_DWORD dwState = pData->GetItemStyles(m_pInterface, hItem);
+    FX_BOOL bFindSel = dwState & FWL_ITEMSTATE_LTB_Selected;
+    if (!bFindSel) {
+      continue;
+    }
+    SetSelectionDirect(hItem, FALSE);
+    if (!bMulti) {
+      return;
+    }
+  }
+}
+void CFWL_ListBoxImp::SelectAll() {
+  FX_BOOL bMulti =
+      m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection;
+  if (!bMulti) {
+    return;
+  }
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t iCount = pData->CountItems(m_pInterface);
+  if (iCount > 0) {
+    FWL_HLISTITEM hItemStart = pData->GetItem(m_pInterface, 0);
+    FWL_HLISTITEM hItemEnd = pData->GetItem(m_pInterface, iCount - 1);
+    SetSelection(hItemStart, hItemEnd, FALSE);
+  }
+}
+FWL_HLISTITEM CFWL_ListBoxImp::GetFocusedItem() {
+  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);
+    if (!hItem)
+      return NULL;
+    if (pData->GetItemStyles(m_pInterface, hItem) & FWL_ITEMSTATE_LTB_Focused) {
+      return hItem;
+    }
+  }
+  return NULL;
+}
+void CFWL_ListBoxImp::SetFocusItem(FWL_HLISTITEM hItem) {
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  FWL_HLISTITEM hFocus = GetFocusedItem();
+  if (hItem != hFocus) {
+    if (hFocus) {
+      FX_DWORD dwStyle = pData->GetItemStyles(m_pInterface, hFocus);
+      dwStyle &= ~FWL_ITEMSTATE_LTB_Focused;
+      pData->SetItemStyles(m_pInterface, hFocus, dwStyle);
+    }
+    if (hItem) {
+      FX_DWORD dwStyle = pData->GetItemStyles(m_pInterface, hItem);
+      dwStyle |= FWL_ITEMSTATE_LTB_Focused;
+      pData->SetItemStyles(m_pInterface, hItem, dwStyle);
+    }
+  }
+}
+FWL_HLISTITEM CFWL_ListBoxImp::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
+  fx -= m_rtConent.left, fy -= m_rtConent.top;
+  FX_FLOAT fPosX = 0.0f;
+  if (m_pHorzScrollBar) {
+    fPosX = m_pHorzScrollBar->GetPos();
+  }
+  FX_FLOAT fPosY = 0.0;
+  if (m_pVertScrollBar) {
+    fPosY = m_pVertScrollBar->GetPos();
+  }
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t nCount = pData->CountItems(m_pInterface);
+  for (int32_t i = 0; i < nCount; i++) {
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+    if (!hItem) {
+      continue;
+    }
+    CFX_RectF rtItem;
+    pData->GetItemRect(m_pInterface, hItem, rtItem);
+    rtItem.Offset(-fPosX, -fPosY);
+    if (rtItem.Contains(fx, fy)) {
+      return hItem;
+    }
+  }
+  return NULL;
+}
+FX_BOOL CFWL_ListBoxImp::GetItemCheckRect(FWL_HLISTITEM hItem,
+                                          CFX_RectF& rtCheck) {
+  if (!m_pProperties->m_pDataProvider)
+    return FALSE;
+  if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check)) {
+    return FALSE;
+  }
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  pData->GetItemCheckRect(m_pInterface, hItem, rtCheck);
+  return TRUE;
+}
+FX_BOOL CFWL_ListBoxImp::GetItemChecked(FWL_HLISTITEM hItem) {
+  if (!m_pProperties->m_pDataProvider)
+    return FALSE;
+  if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check)) {
+    return FALSE;
+  }
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  return (pData->GetItemCheckState(m_pInterface, hItem) &
+          FWL_ITEMSTATE_LTB_Checked);
+}
+FX_BOOL CFWL_ListBoxImp::SetItemChecked(FWL_HLISTITEM hItem, FX_BOOL bChecked) {
+  if (!m_pProperties->m_pDataProvider)
+    return FALSE;
+  if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check)) {
+    return FALSE;
+  }
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  pData->SetItemCheckState(m_pInterface, hItem,
+                           bChecked ? FWL_ITEMSTATE_LTB_Checked : 0);
+  return TRUE;
+}
+FX_BOOL CFWL_ListBoxImp::ScrollToVisible(FWL_HLISTITEM hItem) {
+  if (!m_pVertScrollBar)
+    return FALSE;
+  CFX_RectF rtItem;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  pData->GetItemRect(m_pInterface, hItem, rtItem);
+  FX_BOOL bScroll = FALSE;
+  FX_FLOAT fPosY = m_pVertScrollBar->GetPos();
+  rtItem.Offset(0, -fPosY + m_rtConent.top);
+  if (rtItem.top < m_rtConent.top) {
+    fPosY += rtItem.top - m_rtConent.top;
+    bScroll = TRUE;
+  } else if (rtItem.bottom() > m_rtConent.bottom()) {
+    fPosY += rtItem.bottom() - m_rtConent.bottom();
+    bScroll = TRUE;
+  }
+  if (!bScroll) {
+    return FALSE;
+  }
+  m_pVertScrollBar->SetPos(fPosY);
+  m_pVertScrollBar->SetTrackPos(fPosY);
+  Repaint(&m_rtClient);
+  return TRUE;
+}
+void CFWL_ListBoxImp::DrawBkground(CFX_Graphics* pGraphics,
+                                   IFWL_ThemeProvider* pTheme,
+                                   const CFX_Matrix* pMatrix) {
+  if (!pGraphics)
+    return;
+  if (!pTheme)
+    return;
+  CFWL_ThemeBackground param;
+  param.m_pWidget = m_pInterface;
+  param.m_iPart = FWL_PART_LTB_Background;
+  param.m_dwStates = 0;
+  param.m_pGraphics = pGraphics;
+  param.m_matrix.Concat(*pMatrix);
+  param.m_rtPart = m_rtClient;
+  if (IsShowScrollBar(FALSE) && IsShowScrollBar(TRUE)) {
+    param.m_pData = &m_rtStatic;
+  }
+  if (!IsEnabled()) {
+    param.m_dwStates = FWL_PARTSTATE_LTB_Disabled;
+  }
+  pTheme->DrawBackground(&param);
+}
+void CFWL_ListBoxImp::DrawItems(CFX_Graphics* pGraphics,
+                                IFWL_ThemeProvider* pTheme,
+                                const CFX_Matrix* pMatrix) {
+  FX_FLOAT fPosX = 0.0f;
+  if (m_pHorzScrollBar) {
+    fPosX = m_pHorzScrollBar->GetPos();
+  }
+  FX_FLOAT fPosY = 0.0f;
+  if (m_pVertScrollBar) {
+    fPosY = m_pVertScrollBar->GetPos();
+  }
+  CFX_RectF rtView(m_rtConent);
+  if (m_pHorzScrollBar) {
+    rtView.height -= m_fScorllBarWidth;
+  }
+  if (m_pVertScrollBar) {
+    rtView.width -= m_fScorllBarWidth;
+  }
+  FX_BOOL bMultiCol =
+      m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiColumn;
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  int32_t iCount = pData->CountItems(m_pInterface);
+  for (int32_t i = 0; i < iCount; i++) {
+    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+    if (!hItem) {
+      continue;
+    }
+    CFX_RectF rtItem;
+    pData->GetItemRect(m_pInterface, hItem, rtItem);
+    rtItem.Offset(m_rtConent.left - fPosX, m_rtConent.top - fPosY);
+    if (rtItem.bottom() < m_rtConent.top) {
+      continue;
+    }
+    if (rtItem.top >= m_rtConent.bottom()) {
+      break;
+    }
+    if (bMultiCol && rtItem.left > m_rtConent.right()) {
+      break;
+    }
+    if (GetStylesEx() & FWL_STYLEEXT_LTB_OwnerDraw) {
+      CFWL_EvtLtbDrawItem ev;
+      ev.m_pSrcTarget = m_pInterface;
+      ev.m_pGraphics = pGraphics;
+      ev.m_matrix = *pMatrix;
+      ev.m_index = i;
+      ev.m_rect = rtItem;
+      DispatchEvent(&ev);
+    } else {
+      DrawItem(pGraphics, pTheme, hItem, i, rtItem, pMatrix);
+    }
+  }
+}
+void CFWL_ListBoxImp::DrawItem(CFX_Graphics* pGraphics,
+                               IFWL_ThemeProvider* pTheme,
+                               FWL_HLISTITEM hItem,
+                               int32_t Index,
+                               const CFX_RectF& rtItem,
+                               const CFX_Matrix* pMatrix) {
+  IFWL_ListBoxDP* pData =
+      static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+  FX_DWORD dwItemStyles = pData->GetItemStyles(m_pInterface, hItem);
+  FX_DWORD dwPartStates = FWL_PARTSTATE_LTB_Normal;
+  if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
+    dwPartStates = FWL_PARTSTATE_LTB_Disabled;
+  } else if (dwItemStyles & FWL_ITEMSTATE_LTB_Selected) {
+    dwPartStates = FWL_PARTSTATE_LTB_Selected;
+  }
+  if (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused &&
+      dwItemStyles & FWL_ITEMSTATE_LTB_Focused) {
+    dwPartStates |= FWL_PARTSTATE_LTB_Focused;
+  }
+  FWL_ListBoxItemData itemData;
+  itemData.pDataProvider = pData;
+  itemData.iIndex = Index;
+  {
+    CFWL_ThemeBackground param;
+    param.m_pWidget = m_pInterface;
+    param.m_iPart = FWL_PART_LTB_ListItem;
+    param.m_dwStates = dwPartStates;
+    param.m_pGraphics = pGraphics;
+    param.m_matrix.Concat(*pMatrix);
+    param.m_rtPart = rtItem;
+    param.m_dwData = (FX_DWORD)(uintptr_t)(&itemData);
+    CFX_RectF rtFocus(rtItem);
+    param.m_pData = &rtFocus;
+    if (m_pVertScrollBar && !m_pHorzScrollBar &&
+        (dwPartStates & FWL_PARTSTATE_LTB_Focused)) {
+      param.m_rtPart.left += 1;
+      param.m_rtPart.width -= (m_fScorllBarWidth + 1);
+      rtFocus.Deflate(0.5, 0.5, 1 + m_fScorllBarWidth, 1);
+    }
+    pTheme->DrawBackground(&param);
+  }
+  {
+    FX_BOOL bHasIcon = GetStylesEx() & FWL_STYLEEXT_LTB_Icon;
+    if (bHasIcon) {
+      CFX_RectF rtDIB;
+      CFX_DIBitmap* pDib = pData->GetItemIcon(m_pInterface, hItem);
+      rtDIB.Set(rtItem.left, rtItem.top, rtItem.height, rtItem.height);
+      if (pDib) {
+        CFWL_ThemeBackground param;
+        param.m_pWidget = m_pInterface;
+        param.m_iPart = FWL_PART_LTB_Icon;
+        param.m_pGraphics = pGraphics;
+        param.m_matrix.Concat(*pMatrix);
+        param.m_rtPart = rtDIB;
+        param.m_dwData = (FX_DWORD)(uintptr_t)(&itemData);
+        param.m_pImage = pDib;
+        pTheme->DrawBackground(&param);
+      }
+    }
+    FX_BOOL bHasCheck = GetStylesEx() & FWL_STYLEEXT_LTB_Check;
+    if (bHasCheck) {
+      CFX_RectF rtCheck;
+      rtCheck.Set(rtItem.left, rtItem.top, rtItem.height, rtItem.height);
+      rtCheck.Deflate(2, 2, 2, 2);
+      pData->SetItemCheckRect(m_pInterface, hItem, rtCheck);
+      CFWL_ThemeBackground param;
+      param.m_pWidget = m_pInterface;
+      param.m_iPart = FWL_PART_LTB_Check;
+      param.m_pGraphics = pGraphics;
+      if (GetItemChecked(hItem)) {
+        param.m_dwStates = FWL_PARTSTATE_LTB_Checked;
+      } else {
+        param.m_dwStates = FWL_PARTSTATE_LTB_UnChecked;
+      }
+      param.m_matrix.Concat(*pMatrix);
+      param.m_rtPart = rtCheck;
+      param.m_dwData = (FX_DWORD)(uintptr_t)(&itemData);
+      pTheme->DrawBackground(&param);
+    }
+    CFX_WideString wsText;
+    pData->GetItemText(m_pInterface, hItem, wsText);
+    if (wsText.GetLength() <= 0) {
+      return;
+    }
+    CFX_RectF rtText(rtItem);
+    rtText.Deflate(FWL_LISTBOX_ItemTextMargin, FWL_LISTBOX_ItemTextMargin);
+    if (bHasIcon || bHasCheck) {
+      rtText.Deflate(rtItem.height, 0, 0, 0);
+    }
+    CFWL_ThemeText textParam;
+    textParam.m_pWidget = m_pInterface;
+    textParam.m_iPart = FWL_PART_LTB_ListItem;
+    textParam.m_dwStates = dwPartStates;
+    textParam.m_pGraphics = pGraphics;
+    textParam.m_matrix.Concat(*pMatrix);
+    textParam.m_rtPart = rtText;
+    textParam.m_wsText = wsText;
+    textParam.m_dwTTOStyles = m_dwTTOStyles;
+    textParam.m_iTTOAlign = m_iTTOAligns;
+    textParam.m_dwData = (FX_DWORD)(uintptr_t)(&itemData);
+    pTheme->DrawText(&textParam);
+  }
+}
+CFX_SizeF CFWL_ListBoxImp::CalcSize(FX_BOOL bAutoSize) {
+  CFX_SizeF fs;
+  if (!m_pProperties->m_pThemeProvider)
+    return fs;
+
+  GetClientRect(m_rtClient);
+  m_rtConent = m_rtClient;
+  CFX_RectF rtUIMargin;
+  rtUIMargin.Set(0, 0, 0, 0);
+  if (!m_pOuter) {
+    CFX_RectF* pUIMargin =
+        static_cast<CFX_RectF*>(GetThemeCapacity(FWL_WGTCAPACITY_UIMargin));
+    if (pUIMargin) {
+      m_rtConent.Deflate(pUIMargin->left, pUIMargin->top, pUIMargin->width,
+                         pUIMargin->height);
+    }
+  }
+  FX_FLOAT fWidth = 0;
+  if (m_pProperties->m_pThemeProvider->IsCustomizedLayout(m_pInterface)) {
+    IFWL_ListBoxDP* pData =
+        static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+    if (!bAutoSize) {
+    }
+    int32_t iCount = pData->CountItems(m_pInterface);
+    for (int32_t i = 0; i < iCount; i++) {
+      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+      CFWL_ThemePart itemPart;
+      itemPart.m_pWidget = m_pInterface;
+      itemPart.m_iPart = FWL_PART_LTB_ListItem;
+      itemPart.m_pData = m_pProperties->m_pDataProvider;
+      itemPart.m_dwData = i;
+      CFX_RectF r;
+      m_pProperties->m_pThemeProvider->GetPartRect(&itemPart, r);
+      if (!bAutoSize) {
+        CFX_RectF rtItem;
+        rtItem.Set(m_rtClient.left, m_rtClient.top + fs.y, r.width, r.height);
+        IFWL_ListBoxDP* pData =
+            static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+        pData->SetItemRect(m_pInterface, hItem, rtItem);
+      }
+      fs.y += r.height;
+      if (fs.x < r.width) {
+        fs.x = r.width;
+        fWidth = r.width;
+      }
+    }
+  } else {
+    fWidth = GetMaxTextWidth();
+    fWidth += 2 * FWL_LISTBOX_ItemTextMargin;
+    if (!bAutoSize) {
+      FX_FLOAT fActualWidth =
+          m_rtClient.width - rtUIMargin.left - rtUIMargin.width;
+      if (fWidth < fActualWidth) {
+        fWidth = fActualWidth;
+      }
+    }
+    IFWL_ListBoxDP* pData =
+        static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+    m_fItemHeight = GetItemHeigt();
+    FX_BOOL bHasIcon;
+    bHasIcon = GetStylesEx() & FWL_STYLEEXT_LTB_Icon;
+    if (bHasIcon) {
+      fWidth += m_fItemHeight;
+    }
+    int32_t iCount = pData->CountItems(m_pInterface);
+    for (int32_t i = 0; i < iCount; i++) {
+      FWL_HLISTITEM htem = pData->GetItem(m_pInterface, i);
+      GetItemSize(fs, htem, fWidth, m_fItemHeight, bAutoSize);
+    }
+  }
+  if (bAutoSize) {
+    return fs;
+  }
+  FX_FLOAT iWidth = m_rtClient.width - rtUIMargin.left - rtUIMargin.width;
+  FX_FLOAT iHeight = m_rtClient.height;
+  FX_BOOL bShowVertScr =
+      (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_ShowScrollBarAlaways) &&
+      (m_pProperties->m_dwStyles & FWL_WGTSTYLE_VScroll);
+  FX_BOOL bShowHorzScr =
+      (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_ShowScrollBarAlaways) &&
+      (m_pProperties->m_dwStyles & FWL_WGTSTYLE_HScroll);
+  if (!bShowVertScr && m_pProperties->m_dwStyles & FWL_WGTSTYLE_VScroll &&
+      (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiColumn) == 0) {
+    bShowVertScr = (fs.y > iHeight);
+  }
+  if (!bShowHorzScr && m_pProperties->m_dwStyles & FWL_WGTSTYLE_HScroll) {
+    bShowHorzScr = (fs.x > iWidth);
+  }
+  CFX_SizeF szRange;
+  if (bShowVertScr) {
+    if (!m_pVertScrollBar) {
+      InitScrollBar();
+    }
+    CFX_RectF rtScrollBar;
+    rtScrollBar.Set(m_rtClient.right() - m_fScorllBarWidth, m_rtClient.top,
+                    m_fScorllBarWidth, m_rtClient.height - 1);
+    if (bShowHorzScr) {
+      rtScrollBar.height -= m_fScorllBarWidth;
+    }
+    m_pVertScrollBar->SetWidgetRect(rtScrollBar);
+    szRange.x = 0, szRange.y = fs.y - m_rtConent.height;
+    if (szRange.y < m_fItemHeight) {
+      szRange.y = m_fItemHeight;
+    }
+    m_pVertScrollBar->SetRange(szRange.x, szRange.y);
+    m_pVertScrollBar->SetPageSize(rtScrollBar.height * 9 / 10);
+    m_pVertScrollBar->SetStepSize(m_fItemHeight);
+    FX_FLOAT fPos = m_pVertScrollBar->GetPos();
+    if (fPos < 0) {
+      fPos = 0;
+    }
+    if (fPos > szRange.y) {
+      fPos = szRange.y;
+    }
+    m_pVertScrollBar->SetPos(fPos);
+    m_pVertScrollBar->SetTrackPos(fPos);
+    if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_ShowScrollBarFocus) ==
+            0 ||
+        (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)) {
+      m_pVertScrollBar->SetStates(FWL_WGTSTATE_Invisible, FALSE);
+    }
+    m_pVertScrollBar->Update();
+  } else if (m_pVertScrollBar) {
+    m_pVertScrollBar->SetPos(0);
+    m_pVertScrollBar->SetTrackPos(0);
+    m_pVertScrollBar->SetStates(FWL_WGTSTATE_Invisible, TRUE);
+  }
+  if (bShowHorzScr) {
+    if (!m_pHorzScrollBar) {
+      InitScrollBar(FALSE);
+    }
+    CFX_RectF rtScrollBar;
+    rtScrollBar.Set(m_rtClient.left, m_rtClient.bottom() - m_fScorllBarWidth,
+                    m_rtClient.width, m_fScorllBarWidth);
+    if (bShowVertScr) {
+      rtScrollBar.width -= m_fScorllBarWidth;
+    }
+    m_pHorzScrollBar->SetWidgetRect(rtScrollBar);
+    szRange.x = 0, szRange.y = fs.x - rtScrollBar.width;
+    m_pHorzScrollBar->SetRange(szRange.x, szRange.y);
+    m_pHorzScrollBar->SetPageSize(fWidth * 9 / 10);
+    m_pHorzScrollBar->SetStepSize(fWidth / 10);
+    FX_FLOAT fPos = m_pHorzScrollBar->GetPos();
+    if (fPos < 0) {
+      fPos = 0;
+    }
+    if (fPos > szRange.y) {
+      fPos = szRange.y;
+    }
+    m_pHorzScrollBar->SetPos(fPos);
+    m_pHorzScrollBar->SetTrackPos(fPos);
+    if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_ShowScrollBarFocus) ==
+            0 ||
+        (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)) {
+      m_pHorzScrollBar->SetStates(FWL_WGTSTATE_Invisible, FALSE);
+    }
+    m_pHorzScrollBar->Update();
+  } else if (m_pHorzScrollBar) {
+    m_pHorzScrollBar->SetPos(0);
+    m_pHorzScrollBar->SetTrackPos(0);
+    m_pHorzScrollBar->SetStates(FWL_WGTSTATE_Invisible, TRUE);
+  }
+  if (bShowVertScr && bShowHorzScr) {
+    m_rtStatic.Set(m_rtClient.right() - m_fScorllBarWidth,
+                   m_rtClient.bottom() - m_fScorllBarWidth, m_fScorllBarWidth,
+                   m_fScorllBarWidth);
+  }
+  return fs;
+}
+void CFWL_ListBoxImp::GetItemSize(CFX_SizeF& size,
+                                  FWL_HLISTITEM hItem,
+                                  FX_FLOAT fWidth,
+                                  FX_FLOAT m_fItemHeight,
+                                  FX_BOOL bAutoSize) {
+  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiColumn) {
+  } else {
+    if (!bAutoSize) {
+      CFX_RectF rtItem;
+      rtItem.Set(0, size.y, fWidth, m_fItemHeight);
+      IFWL_ListBoxDP* pData =
+          static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
+      pData->SetItemRect(m_pInterface, hItem, rtItem);
+    }
+    size.x = fWidth;
+    size.y += m_fItemHeight;
+  }
+}
+FX_FLOAT CFWL_ListBoxImp::GetMaxTextWidth() {
+  FX_FLOAT fRet = 0.0f;
+  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);
+    if (!hItem) {
+      continue;
+    }
+    CFX_WideString wsText;
+    pData->GetItemText(m_pInterface, hItem, wsText);
+    CFX_SizeF sz = CalcTextSize(wsText, m_pProperties->m_pThemeProvider);
+    if (sz.x > fRet) {
+      fRet = sz.x;
+    }
+  }
+  return fRet;
+}
+FX_FLOAT CFWL_ListBoxImp::GetScrollWidth() {
+  FX_FLOAT* pfWidth =
+      static_cast<FX_FLOAT*>(GetThemeCapacity(FWL_WGTCAPACITY_ScrollBarWidth));
+  if (!pfWidth)
+    return 0;
+  return *pfWidth;
+}
+FX_FLOAT CFWL_ListBoxImp::GetItemHeigt() {
+  FX_FLOAT* pfFont =
+      static_cast<FX_FLOAT*>(GetThemeCapacity(FWL_WGTCAPACITY_FontSize));
+  if (!pfFont)
+    return 20;
+  return *pfFont + 2 * FWL_LISTBOX_ItemTextMargin;
+}
+void CFWL_ListBoxImp::InitScrollBar(FX_BOOL bVert) {
+  if ((bVert && m_pVertScrollBar) || (!bVert && m_pHorzScrollBar)) {
+    return;
+  }
+  CFWL_WidgetImpProperties prop;
+  prop.m_dwStyleExes = bVert ? FWL_STYLEEXT_SCB_Vert : FWL_STYLEEXT_SCB_Horz;
+  prop.m_dwStates = FWL_WGTSTATE_Invisible;
+  prop.m_pParent = m_pInterface;
+  prop.m_pThemeProvider = m_pScrollBarTP;
+  IFWL_ScrollBar* pScrollBar = IFWL_ScrollBar::Create(prop, m_pInterface);
+  pScrollBar->Initialize();
+  (bVert ? &m_pVertScrollBar : &m_pHorzScrollBar)->reset(pScrollBar);
+}
+void CFWL_ListBoxImp::SortItem() {}
+FX_BOOL CFWL_ListBoxImp::IsShowScrollBar(FX_BOOL bVert) {
+  IFWL_ScrollBar* pScrollbar =
+      bVert ? m_pVertScrollBar.get() : m_pHorzScrollBar.get();
+  if (!pScrollbar || (pScrollbar->GetStates() & FWL_WGTSTATE_Invisible)) {
+    return FALSE;
+  }
+  return !(m_pProperties->m_dwStyleExes &
+           FWL_STYLEEXT_LTB_ShowScrollBarFocus) ||
+         (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused);
+}
+void CFWL_ListBoxImp::ProcessSelChanged() {
+  CFWL_EvtLtbSelChanged selEvent;
+  selEvent.m_pSrcTarget = m_pInterface;
+  CFX_Int32Array arrSels;
+  int32_t iCount = CountSelItems();
+  for (int32_t i = 0; i < iCount; i++) {
+    FWL_HLISTITEM item = GetSelItem(i);
+    if (item == NULL) {
+      continue;
+    }
+    selEvent.iarraySels.Add(i);
+  }
+  DispatchEvent(&selEvent);
+}
+CFWL_ListBoxImpDelegate::CFWL_ListBoxImpDelegate(CFWL_ListBoxImp* pOwner)
+    : m_pOwner(pOwner) {}
+int32_t CFWL_ListBoxImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
+  if (!pMessage)
+    return 0;
+  if (!m_pOwner->IsEnabled()) {
+    return 1;
+  }
+  FX_DWORD dwMsgCode = pMessage->GetClassID();
+  int32_t 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;
+        }
+        default: {}
+      }
+      break;
+    }
+    case FWL_MSGHASH_MouseWheel: {
+      OnMouseWheel(static_cast<CFWL_MsgMouseWheel*>(pMessage));
+      break;
+    }
+    case FWL_MSGHASH_Key: {
+      CFWL_MsgKey* pMsg = static_cast<CFWL_MsgKey*>(pMessage);
+      if (pMsg->m_dwCmd == FWL_MSGKEYCMD_KeyDown)
+        OnKeyDown(pMsg);
+      break;
+    }
+    default: { iRet = 0; }
+  }
+  CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
+  return iRet;
+}
+FWL_ERR CFWL_ListBoxImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {
+  if (!pEvent)
+    return FWL_ERR_Indefinite;
+  if (pEvent->GetClassID() != FWL_EVTHASH_Scroll) {
+    return FWL_ERR_Succeeded;
+  }
+  IFWL_Widget* pSrcTarget = pEvent->m_pSrcTarget;
+  if ((pSrcTarget == m_pOwner->m_pVertScrollBar.get() &&
+       m_pOwner->m_pVertScrollBar) ||
+      (pSrcTarget == m_pOwner->m_pHorzScrollBar.get() &&
+       m_pOwner->m_pHorzScrollBar)) {
+    CFWL_EvtScroll* pScrollEvent = static_cast<CFWL_EvtScroll*>(pEvent);
+    OnScroll(static_cast<IFWL_ScrollBar*>(pSrcTarget),
+             pScrollEvent->m_iScrollCode, pScrollEvent->m_fPos);
+  }
+  return FWL_ERR_Succeeded;
+}
+FWL_ERR CFWL_ListBoxImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
+                                              const CFX_Matrix* pMatrix) {
+  return m_pOwner->DrawWidget(pGraphics, pMatrix);
+}
+void CFWL_ListBoxImpDelegate::OnFocusChanged(CFWL_Message* pMsg, FX_BOOL bSet) {
+  if (m_pOwner->GetStylesEx() & FWL_STYLEEXT_LTB_ShowScrollBarFocus) {
+    if (m_pOwner->m_pVertScrollBar) {
+      m_pOwner->m_pVertScrollBar->SetStates(FWL_WGTSTATE_Invisible, !bSet);
+    }
+    if (m_pOwner->m_pHorzScrollBar) {
+      m_pOwner->m_pHorzScrollBar->SetStates(FWL_WGTSTATE_Invisible, !bSet);
+    }
+  }
+  if (bSet) {
+    m_pOwner->m_pProperties->m_dwStates |= (FWL_WGTSTATE_Focused);
+  } else {
+    m_pOwner->m_pProperties->m_dwStates &= ~(FWL_WGTSTATE_Focused);
+  }
+  m_pOwner->Repaint(&m_pOwner->m_rtClient);
+}
+void CFWL_ListBoxImpDelegate::OnLButtonDown(CFWL_MsgMouse* pMsg) {
+  m_pOwner->m_bLButtonDown = TRUE;
+  if ((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0) {
+    m_pOwner->SetFocus(TRUE);
+  }
+  FWL_HLISTITEM hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
+  if (!hItem) {
+    return;
+  }
+  if (m_pOwner->m_pProperties->m_dwStyleExes &
+      FWL_STYLEEXT_LTB_MultiSelection) {
+    if (pMsg->m_dwFlags & FWL_KEYFLAG_Ctrl) {
+      FX_BOOL bSelected = m_pOwner->IsItemSelected(hItem);
+      m_pOwner->SetSelectionDirect(hItem, !bSelected);
+      m_pOwner->m_hAnchor = hItem;
+    } else if (pMsg->m_dwFlags & FWL_KEYFLAG_Shift) {
+      if (m_pOwner->m_hAnchor) {
+        m_pOwner->SetSelection(m_pOwner->m_hAnchor, hItem, TRUE);
+      } else {
+        m_pOwner->SetSelectionDirect(hItem, TRUE);
+      }
+    } else {
+      m_pOwner->SetSelection(hItem, hItem, TRUE);
+      m_pOwner->m_hAnchor = hItem;
+    }
+  } else {
+    m_pOwner->SetSelection(hItem, hItem, TRUE);
+  }
+  if (m_pOwner->m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check) {
+    FWL_HLISTITEM hSelectedItem =
+        m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
+    CFX_RectF rtCheck;
+    m_pOwner->GetItemCheckRect(hSelectedItem, rtCheck);
+    FX_BOOL bChecked = m_pOwner->GetItemChecked(hItem);
+    if (rtCheck.Contains(pMsg->m_fx, pMsg->m_fy)) {
+      if (bChecked) {
+        m_pOwner->SetItemChecked(hItem, FALSE);
+      } else {
+        m_pOwner->SetItemChecked(hItem, TRUE);
+      }
+      m_pOwner->Update();
+    }
+  }
+  m_pOwner->SetFocusItem(hItem);
+  m_pOwner->ScrollToVisible(hItem);
+  m_pOwner->SetGrab(TRUE);
+  m_pOwner->ProcessSelChanged();
+  m_pOwner->Repaint(&m_pOwner->m_rtClient);
+}
+void CFWL_ListBoxImpDelegate::OnLButtonUp(CFWL_MsgMouse* pMsg) {
+  if (m_pOwner->m_bLButtonDown) {
+    m_pOwner->m_bLButtonDown = FALSE;
+    m_pOwner->SetGrab(FALSE);
+    DispatchSelChangedEv();
+  }
+}
+void CFWL_ListBoxImpDelegate::OnMouseWheel(CFWL_MsgMouseWheel* pMsg) {
+  if (!m_pOwner->IsShowScrollBar(TRUE)) {
+    return;
+  }
+  IFWL_WidgetDelegate* pDelegate =
+      m_pOwner->m_pVertScrollBar->SetDelegate(NULL);
+  pDelegate->OnProcessMessage(pMsg);
+}
+void CFWL_ListBoxImpDelegate::OnKeyDown(CFWL_MsgKey* pMsg) {
+  FX_DWORD dwKeyCode = pMsg->m_dwKeyCode;
+  switch (dwKeyCode) {
+    case FWL_VKEY_Tab:
+    case FWL_VKEY_Up:
+    case FWL_VKEY_Down:
+    case FWL_VKEY_Home:
+    case FWL_VKEY_End: {
+      FWL_HLISTITEM hItem = m_pOwner->GetFocusedItem();
+      hItem = m_pOwner->GetItem(hItem, dwKeyCode);
+      FX_BOOL bShift = pMsg->m_dwFlags & FWL_KEYFLAG_Shift;
+      FX_BOOL bCtrl = pMsg->m_dwFlags & FWL_KEYFLAG_Ctrl;
+      OnVK(hItem, bShift, bCtrl);
+      DispatchSelChangedEv();
+      m_pOwner->ProcessSelChanged();
+      break;
+    }
+    default: {}
+  }
+}
+void CFWL_ListBoxImpDelegate::OnVK(FWL_HLISTITEM hItem,
+                                   FX_BOOL bShift,
+                                   FX_BOOL bCtrl) {
+  if (!hItem) {
+    return;
+  }
+  if (m_pOwner->m_pProperties->m_dwStyleExes &
+      FWL_STYLEEXT_LTB_MultiSelection) {
+    if (bCtrl) {
+    } else if (bShift) {
+      if (m_pOwner->m_hAnchor) {
+        m_pOwner->SetSelection(m_pOwner->m_hAnchor, hItem, TRUE);
+      } else {
+        m_pOwner->SetSelectionDirect(hItem, TRUE);
+      }
+    } else {
+      m_pOwner->SetSelection(hItem, hItem, TRUE);
+      m_pOwner->m_hAnchor = hItem;
+    }
+  } else {
+    m_pOwner->SetSelection(hItem, hItem, TRUE);
+  }
+  m_pOwner->SetFocusItem(hItem);
+  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);
+  }
+}
+FX_BOOL CFWL_ListBoxImpDelegate::OnScroll(IFWL_ScrollBar* pScrollBar,
+                                          FX_DWORD dwCode,
+                                          FX_FLOAT fPos) {
+  CFX_SizeF fs;
+  pScrollBar->GetRange(fs.x, fs.y);
+  FX_FLOAT iCurPos = pScrollBar->GetPos();
+  FX_FLOAT fStep = pScrollBar->GetStepSize();
+  switch (dwCode) {
+    case FWL_SCBCODE_Min: {
+      fPos = fs.x;
+      break;
+    }
+    case FWL_SCBCODE_Max: {
+      fPos = fs.y;
+      break;
+    }
+    case FWL_SCBCODE_StepBackward: {
+      fPos -= fStep;
+      if (fPos < fs.x + fStep / 2) {
+        fPos = fs.x;
+      }
+      break;
+    }
+    case FWL_SCBCODE_StepForward: {
+      fPos += fStep;
+      if (fPos > fs.y - fStep / 2) {
+        fPos = fs.y;
+      }
+      break;
+    }
+    case FWL_SCBCODE_PageBackward: {
+      fPos -= pScrollBar->GetPageSize();
+      if (fPos < fs.x) {
+        fPos = fs.x;
+      }
+      break;
+    }
+    case FWL_SCBCODE_PageForward: {
+      fPos += pScrollBar->GetPageSize();
+      if (fPos > fs.y) {
+        fPos = fs.y;
+      }
+      break;
+    }
+    case FWL_SCBCODE_Pos:
+    case FWL_SCBCODE_TrackPos:
+      break;
+    case FWL_SCBCODE_EndScroll:
+      return FALSE;
+  }
+  if (iCurPos != fPos) {
+    pScrollBar->SetPos(fPos);
+    pScrollBar->SetTrackPos(fPos);
+    m_pOwner->Repaint(&m_pOwner->m_rtClient);
+  }
+  return TRUE;
+}
+void CFWL_ListBoxImpDelegate::DispatchSelChangedEv() {
+  CFWL_EvtLtbSelChanged ev;
+  ev.m_pSrcTarget = m_pOwner->m_pInterface;
+  m_pOwner->DispatchEvent(&ev);
+}