Convert single use EventTypes to class files.

xfa/fwl/core/ifwl_combobox.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/fwl/core/ifwl_combobox.h"
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fde/cfde_txtedtengine.h"
 #include "xfa/fde/tto/fde_textout.h"
+#include "xfa/fwl/core/cfwl_evtpostdropdown.h"
+#include "xfa/fwl/core/cfwl_evtpredropdown.h"
 #include "xfa/fwl/core/cfwl_evttextchanged.h"
 #include "xfa/fwl/core/cfwl_msgkey.h"
 #include "xfa/fwl/core/cfwl_msgkillfocus.h"
 #include "xfa/fwl/core/cfwl_msgmouse.h"
 #include "xfa/fwl/core/cfwl_msgsetfocus.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"
@@ skipping 364 matching lines @@
       m_rtList.top = m_fComboFormHandler;
     } else {
       m_rtHandler.Set(0, m_rtList.height, m_rtList.width, m_fComboFormHandler);
     }
   }
   m_pComboBoxProxy->SetWidgetRect(m_rtProxy);
   m_pComboBoxProxy->Update();
   m_pListBox->SetWidgetRect(m_rtList);
   m_pListBox->Update();
 
-  CFWL_EvtCmbPreDropDown ev;
+  CFWL_EvtPreDropDown ev;
   ev.m_pSrcTarget = this;
   DispatchEvent(&ev);
 
   m_fItemHeight = m_pListBox->GetItemHeight();
   m_pListBox->SetFocus(true);
   m_pComboBoxProxy->DoModal();
   m_pListBox->SetFocus(false);
 }
 
 void IFWL_ComboBox::MatchEditText() {
@@ skipping 203 matching lines @@
   m_pEdit =
       pdfium::MakeUnique<IFWL_ComboEdit>(m_pOwnerApp, std::move(prop), this);
   m_pEdit->SetOuter(this);
 }
 
 void IFWL_ComboBox::DisForm_ShowDropList(bool bActivate) {
   if (DisForm_IsDropListVisible() == bActivate)
     return;
 
   if (bActivate) {
-    CFWL_EvtCmbPreDropDown preEvent;
+    CFWL_EvtPreDropDown 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);
@@ skipping 13 matching lines @@
     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;
+    CFWL_EvtPostDropDown postEvent;
     postEvent.m_pSrcTarget = this;
     DispatchEvent(&postEvent);
   }
 
   CFX_RectF rect;
   m_pListBox->GetWidgetRect(rect);
   rect.Inflate(2, 2);
   Repaint(&rect);
 }
 
@@ skipping 474 matching lines @@
       else
         iCurSel++;
     }
     m_iCurSel = iCurSel;
     SyncEditText(m_iCurSel);
     return;
   }
   if (m_pEdit)
     m_pEdit->GetDelegate()->OnProcessMessage(pMsg);
 }