Cleanup FWL Event and Message code.

xfa/fwl/core/cfwl_datetimeedit.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/cfwl_datetimeedit.h"
 
 #include <memory>
 #include <utility>
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/cfwl_datetimepicker.h"
 #include "xfa/fwl/core/cfwl_msgmouse.h"
 #include "xfa/fwl/core/cfwl_widgetmgr.h"
 
 CFWL_DateTimeEdit::CFWL_DateTimeEdit(
     const CFWL_App* app,
     std::unique_ptr<CFWL_WidgetProperties> properties,
     CFWL_Widget* pOuter)
     : CFWL_Edit(app, std::move(properties), pOuter) {}
 
 void CFWL_DateTimeEdit::OnProcessMessage(CFWL_Message* pMessage) {
   if (m_pWidgetMgr->IsFormDisabled()) {
     DisForm_OnProcessMessage(pMessage);
     return;
   }
 
-  CFWL_MessageType dwHashCode = pMessage->GetClassID();
-  if (dwHashCode == CFWL_MessageType::SetFocus ||
-      dwHashCode == CFWL_MessageType::KillFocus) {
+  CFWL_Message::Type type = pMessage->GetType();
+  if (type == CFWL_Message::Type::SetFocus ||
+      type == CFWL_Message::Type::KillFocus) {
     CFWL_Widget* pOuter = GetOuter();
     pOuter->GetDelegate()->OnProcessMessage(pMessage);
   }
 }
 
 void CFWL_DateTimeEdit::DisForm_OnProcessMessage(CFWL_Message* pMessage) {
-  CFWL_MessageType dwHashCode = pMessage->GetClassID();
   if (!m_pWidgetMgr->IsFormDisabled() ||
-      dwHashCode != CFWL_MessageType::Mouse) {
+      pMessage->GetType() != CFWL_Message::Type::Mouse) {
     CFWL_Edit::OnProcessMessage(pMessage);
     return;
   }
 
   CFWL_MsgMouse* pMouse = static_cast<CFWL_MsgMouse*>(pMessage);
   if (pMouse->m_dwCmd == FWL_MouseCommand::LeftButtonDown ||
       pMouse->m_dwCmd == FWL_MouseCommand::RightButtonDown) {
     if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)
       m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
 
     CFWL_DateTimePicker* pDateTime =
         static_cast<CFWL_DateTimePicker*>(m_pOuter);
     if (pDateTime->IsMonthCalendarVisible()) {
       CFX_RectF rtInvalidate;
       pDateTime->GetWidgetRect(rtInvalidate);
       pDateTime->ShowMonthCalendar(false);
       rtInvalidate.Offset(-rtInvalidate.left, -rtInvalidate.top);
       pDateTime->Repaint(&rtInvalidate);
     }
   }
   CFWL_Edit::OnProcessMessage(pMessage);
 }