Cleanup FWL Event and Message code.

xfa/fwl/core/cfwl_combolist.cpp

 // Copyright 2016 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_combolist.h"
 
 #include <memory>
 #include <utility>
@@ skipping 59 matching lines @@
   CFWL_Widget* pOwner = GetOwner();
   if (!pOwner)
     return;
   pOwner->TransformTo(m_pOuter, fx, fy);
 }
 
 void CFWL_ComboList::OnProcessMessage(CFWL_Message* pMessage) {
   if (!pMessage)
     return;
 
-  CFWL_MessageType dwHashCode = pMessage->GetClassID();
+  CFWL_Message::Type type = pMessage->GetType();
   bool backDefault = true;
-  if (dwHashCode == CFWL_MessageType::SetFocus ||
-      dwHashCode == CFWL_MessageType::KillFocus) {
-    OnDropListFocusChanged(pMessage, dwHashCode == CFWL_MessageType::SetFocus);
-  } else if (dwHashCode == CFWL_MessageType::Mouse) {
+  if (type == CFWL_Message::Type::SetFocus ||
+      type == CFWL_Message::Type::KillFocus) {
+    OnDropListFocusChanged(pMessage, type == CFWL_Message::Type::SetFocus);
+  } else if (type == CFWL_Message::Type::Mouse) {
     CFWL_MsgMouse* pMsg = static_cast<CFWL_MsgMouse*>(pMessage);
     CFWL_ScrollBar* vertSB = GetVertScrollBar();
     if (IsShowScrollBar(true) && vertSB) {
       CFX_RectF rect;
       vertSB->GetWidgetRect(rect);
       if (rect.Contains(pMsg->m_fx, pMsg->m_fy)) {
         pMsg->m_fx -= rect.left;
         pMsg->m_fy -= rect.top;
         vertSB->GetDelegate()->OnProcessMessage(pMsg);
         return;
@@ skipping 11 matching lines @@
         break;
       }
       case FWL_MouseCommand::LeftButtonUp: {
         backDefault = false;
         OnDropListLButtonUp(pMsg);
         break;
       }
       default:
         break;
     }
-  } else if (dwHashCode == CFWL_MessageType::Key) {
+  } else if (type == CFWL_Message::Type::Key) {
     backDefault = !OnDropListKey(static_cast<CFWL_MsgKey*>(pMessage));
   }
   if (backDefault)
     CFWL_ListBox::OnProcessMessage(pMessage);
 }
 
 void CFWL_ComboList::OnDropListFocusChanged(CFWL_Message* pMsg, bool bSet) {
   if (bSet)
     return;
 
@@ skipping 111 matching lines @@
       CFX_RectF rtInvalidate;
       rtInvalidate.Set(0, 0, m_pProperties->m_rtWidget.width,
                        m_pProperties->m_rtWidget.height);
       Repaint(&rtInvalidate);
       break;
     }
     default:
       break;
   }
 }