Cleanup FWL Event and Message code.

xfa/fxfa/app/xfa_ffcheckbutton.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_ffcheckbutton.h"
 
 #include "xfa/fwl/core/cfwl_checkbox.h"
 #include "xfa/fwl/core/cfwl_msgmouse.h"
@@ skipping 228 matching lines @@
   mt.Concat(mtRotate);
   GetApp()->GetWidgetMgrDelegate()->OnDrawWidget(m_pNormalWidget, pGS, &mt);
 }
 bool CXFA_FFCheckButton::OnLButtonUp(uint32_t dwFlags,
                                      FX_FLOAT fx,
                                      FX_FLOAT fy) {
   if (!m_pNormalWidget || !IsButtonDown())
     return false;
 
   SetButtonDown(false);
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::LeftButtonUp;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 
 XFA_CHECKSTATE CXFA_FFCheckButton::FWLState2XFAState() {
   uint32_t dwState = m_pNormalWidget->GetStates();
   if (dwState & FWL_STATE_CKB_Checked)
     return XFA_CHECKSTATE_On;
   if (dwState & FWL_STATE_CKB_Neutral)
     return XFA_CHECKSTATE_Neutral;
@@ skipping 27 matching lines @@
   m_pNormalWidget->Update();
   return true;
 }
 
 void CXFA_FFCheckButton::OnProcessMessage(CFWL_Message* pMessage) {
   m_pOldDelegate->OnProcessMessage(pMessage);
 }
 
 void CXFA_FFCheckButton::OnProcessEvent(CFWL_Event* pEvent) {
   CXFA_FFField::OnProcessEvent(pEvent);
-  switch (pEvent->GetClassID()) {
-    case CFWL_EventType::CheckStateChanged: {
+  switch (pEvent->GetType()) {
+    case CFWL_Event::Type::CheckStateChanged: {
       CXFA_EventParam eParam;
       eParam.m_eType = XFA_EVENT_Change;
       m_pDataAcc->GetValue(eParam.m_wsNewText, XFA_VALUEPICTURE_Raw);
       CXFA_WidgetAcc* pFFExclGroup = m_pDataAcc->GetExclGroup();
       if (ProcessCommittedData()) {
         eParam.m_pTarget = pFFExclGroup;
         if (pFFExclGroup) {
           m_pDocView->AddValidateWidget(pFFExclGroup);
           m_pDocView->AddCalculateWidgetAcc(pFFExclGroup);
           pFFExclGroup->ProcessEvent(XFA_ATTRIBUTEENUM_Change, &eParam);
@@ skipping 14 matching lines @@
     default:
       break;
   }
   m_pOldDelegate->OnProcessEvent(pEvent);
 }
 
 void CXFA_FFCheckButton::OnDrawWidget(CFX_Graphics* pGraphics,
                                       const CFX_Matrix* pMatrix) {
   m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }