Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/core/fwl_noteimp.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/fwl_noteimp.h"
 
 #include "core/fxcrt/include/fx_ext.h"
 #include "xfa/fwl/basewidget/fwl_tooltipctrlimp.h"
@@ skipping 452 matching lines @@
   if (iTrackLoop <= 0)
     return FALSE;
   if (iTrackLoop == 1) {
     if (pMessageForm->IsInstance(FX_WSTRC(L"FWL_FORMPROXY"))) {
       return FALSE;
     }
     if (pMsg->m_pSrcTarget &&
         pMsg->m_pSrcTarget->IsInstance(FX_WSTRC(L"FWL_FORMPROXY"))) {
       return FALSE;
     }
-    if (pMsg->m_pSrcTarget && pMsg->m_pSrcTarget->GetClassID() == 1111984755) {
+    if (pMsg->m_pSrcTarget &&
+        pMsg->m_pSrcTarget->GetClassID() == FWL_Type::ToolTip) {
       return FALSE;
     }
     return TRUE;
   }
   IFWL_Widget* pDst = pMsg->m_pDstTarget;
   if (!pDst)
     return FALSE;
 #if (_FX_OS_ == _FX_MACOSX_)
   if (pDst == pMessageForm && pDst->IsInstance(L"FWL_FORMPROXY")) {
     return TRUE;
@@ skipping 169 matching lines @@
     return;
   }
   if (m_pHover) {
     CFWL_MsgMouse msLeave;
     msLeave.m_pDstTarget = m_pHover;
     msLeave.m_fx = pMsg->m_fx;
     msLeave.m_fy = pMsg->m_fy;
     pTarget->TransformTo(m_pHover, msLeave.m_fx, msLeave.m_fy);
     msLeave.m_dwFlags = 0;
     msLeave.m_dwCmd = FWL_MSGMOUSECMD_MouseLeave;
-    DispatchMessage(&msLeave, NULL);
+    DispatchMessage(&msLeave, nullptr);
   }
-  if (pTarget->GetClassID() == FWL_CLASSHASH_Form) {
-    m_pHover = NULL;
+  if (pTarget->GetClassID() == FWL_Type::Form) {
+    m_pHover = nullptr;
     return;
   }
   m_pHover = pTarget;
   CFWL_MsgMouse msHover;
   msHover.m_pDstTarget = pTarget;
   msHover.m_fx = pMsg->m_fx;
   msHover.m_fy = pMsg->m_fy;
   msHover.m_dwFlags = 0;
   msHover.m_dwCmd = FWL_MSGMOUSECMD_MouseHover;
-  DispatchMessage(&msHover, NULL);
+  DispatchMessage(&msHover, nullptr);
 }
 FX_BOOL CFWL_NoteDriver::IsValidMessage(CFWL_Message* pMessage) {
   if (pMessage->GetClassID() == CFWL_MessageType::Post)
     return TRUE;
 
   int32_t iCount = m_noteLoopQueue.GetSize();
   for (int32_t i = 0; i < iCount; i++) {
     CFWL_NoteLoop* pNoteLoop = static_cast<CFWL_NoteLoop*>(m_noteLoopQueue[i]);
     CFWL_WidgetImp* pForm = pNoteLoop->GetForm();
     if (pForm && (pForm->GetInterface() == pMessage->m_pDstTarget))
@@ skipping 281 matching lines @@
   if (HasToolTip(pEvt->m_pDstTarget) && NULL != m_pToolTipImp) {
     m_pToolTipImp->Hide();
     pCurTarget = NULL;
     return TRUE;
   }
   return FALSE;
 }
 IFWL_ToolTipTarget* CFWL_ToolTipContainer::GetCurrentToolTipTarget() {
   return pCurTarget;
 }