Add opaque "layout item" to widgets for caller's use.

xfa/fxfa/app/xfa_ffchoicelist.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fxfa/app/xfa_ffchoicelist.h"
 
 #include "xfa/fwl/basewidget/ifwl_edit.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
@@ skipping 16 matching lines @@
     CFWL_NoteDriver* pNoteDriver = FWL_GetApp()->GetNoteDriver();
     pNoteDriver->UnregisterEventTarget(pWidget);
   }
 }
 FX_BOOL CXFA_FFListBox::LoadWidget() {
   CFWL_ListBox* pListBox = CFWL_ListBox::Create();
   pListBox->Initialize();
   pListBox->ModifyStyles(FWL_WGTSTYLE_VScroll | FWL_WGTSTYLE_NoBackground,
                          0xFFFFFFFF);
   m_pNormalWidget = (CFWL_Widget*)pListBox;
+  m_pNormalWidget->SetLayoutItem(this);
   IFWL_Widget* pWidget = m_pNormalWidget->GetWidget();
-  m_pNormalWidget->SetPrivateData(pWidget, this, NULL);
   CFWL_NoteDriver* pNoteDriver = FWL_GetApp()->GetNoteDriver();
   pNoteDriver->RegisterEventTarget(pWidget, pWidget);
   m_pOldDelegate = m_pNormalWidget->SetDelegate(this);
   m_pNormalWidget->LockUpdate();
   CFX_WideStringArray wsLabelArray;
   m_pDataAcc->GetChoiceListItems(wsLabelArray, FALSE);
   int32_t iItems = wsLabelArray.GetSize();
   for (int32_t i = 0; i < iItems; i++) {
     pListBox->AddString(wsLabelArray[i].AsStringC());
   }
@@ skipping 176 matching lines @@
   ((CFWL_ComboBox*)m_pNormalWidget)->GetBBox(rtWidget);
   if (rtWidget.Contains(fx, fy)) {
     return TRUE;
   }
   return FALSE;
 }
 FX_BOOL CXFA_FFComboBox::LoadWidget() {
   CFWL_ComboBox* pComboBox = CFWL_ComboBox::Create();
   pComboBox->Initialize();
   m_pNormalWidget = (CFWL_Widget*)pComboBox;
+  m_pNormalWidget->SetLayoutItem(this);
   IFWL_Widget* pWidget = m_pNormalWidget->GetWidget();
-  m_pNormalWidget->SetPrivateData(pWidget, this, NULL);
   CFWL_NoteDriver* pNoteDriver = FWL_GetApp()->GetNoteDriver();
   pNoteDriver->RegisterEventTarget(pWidget, pWidget);
   m_pOldDelegate = m_pNormalWidget->SetDelegate(this);
   m_pNormalWidget->LockUpdate();
   CFX_WideStringArray wsLabelArray;
   m_pDataAcc->GetChoiceListItems(wsLabelArray, FALSE);
   int32_t iItems = wsLabelArray.GetSize();
   for (int32_t i = 0; i < iItems; i++) {
     pComboBox->AddString(wsLabelArray[i].AsStringC());
   }
@@ skipping 279 matching lines @@
     default:
       break;
   }
   m_pOldDelegate->OnProcessEvent(pEvent);
 }
 
 void CXFA_FFComboBox::OnDrawWidget(CFX_Graphics* pGraphics,
                                    const CFX_Matrix* pMatrix) {
   m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }