Unify the three CFWL_EventType::SelectChange classes.

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/core/cfwl_combobox.h"
+#include "xfa/fwl/core/cfwl_evtselectchanged.h"
 #include "xfa/fwl/core/cfwl_listbox.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/ifwl_app.h"
 #include "xfa/fwl/core/ifwl_edit.h"
 #include "xfa/fxfa/app/xfa_fffield.h"
 #include "xfa/fxfa/app/xfa_fwladapter.h"
 #include "xfa/fxfa/cxfa_eventparam.h"
 #include "xfa/fxfa/xfa_ffdoc.h"
 #include "xfa/fxfa/xfa_ffdocview.h"
 #include "xfa/fxfa/xfa_ffpageview.h"
@@ skipping 453 matching lines @@
   AddInvalidateRect();
 }
 void CXFA_FFComboBox::OnTextChanged(IFWL_Widget* pWidget,
                                     const CFX_WideString& wsChanged) {
   CXFA_EventParam eParam;
   m_pDataAcc->GetValue(eParam.m_wsPrevText, XFA_VALUEPICTURE_Raw);
   eParam.m_wsChange = wsChanged;
   FWLEventSelChange(&eParam);
 }
 void CXFA_FFComboBox::OnSelectChanged(IFWL_Widget* pWidget,
-                                      const CFX_Int32Array& arrSels,
                                       bool bLButtonUp) {
   CXFA_EventParam eParam;
   m_pDataAcc->GetValue(eParam.m_wsPrevText, XFA_VALUEPICTURE_Raw);
   FWLEventSelChange(&eParam);
   if (m_pDataAcc->GetChoiceListCommitOn() == XFA_ATTRIBUTEENUM_Select &&
       bLButtonUp) {
     m_pDocView->SetFocusWidgetAcc(nullptr);
   }
 }
 void CXFA_FFComboBox::OnPreOpen(IFWL_Widget* pWidget) {
@@ skipping 10 matching lines @@
 }
 
 void CXFA_FFComboBox::OnProcessMessage(CFWL_Message* pMessage) {
   m_pOldDelegate->OnProcessMessage(pMessage);
 }
 
 void CXFA_FFComboBox::OnProcessEvent(CFWL_Event* pEvent) {
   CXFA_FFField::OnProcessEvent(pEvent);
   switch (pEvent->GetClassID()) {
     case CFWL_EventType::SelectChanged: {
-      CFWL_EvtCmbSelChanged* postEvent = (CFWL_EvtCmbSelChanged*)pEvent;
-      OnSelectChanged(m_pNormalWidget->GetWidget(), postEvent->iArraySels,
-                      postEvent->bLButtonUp);
+      CFWL_EvtSelectChanged* postEvent =
+          static_cast<CFWL_EvtSelectChanged*>(pEvent);
+      OnSelectChanged(m_pNormalWidget->GetWidget(), postEvent->bLButtonUp);
       break;
     }
     case CFWL_EventType::EditChanged: {
       CFX_WideString wsChanged;
       OnTextChanged(m_pNormalWidget->GetWidget(), wsChanged);
       break;
     }
     case CFWL_EventType::PreDropDown: {
       OnPreOpen(m_pNormalWidget->GetWidget());
       break;
     }
     case CFWL_EventType::PostDropDown: {
       OnPostOpen(m_pNormalWidget->GetWidget());
       break;
     }
     default:
       break;
   }
   m_pOldDelegate->OnProcessEvent(pEvent);
 }
 
 void CXFA_FFComboBox::OnDrawWidget(CFX_Graphics* pGraphics,
                                    const CFX_Matrix* pMatrix) {
   m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }