Convert single use EventTypes to class files.

xfa/fwl/core/ifwl_checkbox.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_checkbox.h"
 
 #include <algorithm>
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fde/tto/fde_textout.h"
+#include "xfa/fwl/core/cfwl_evtcheckstatechanged.h"
 #include "xfa/fwl/core/cfwl_msgkey.h"
 #include "xfa/fwl/core/cfwl_msgmouse.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/cfwl_themetext.h"
 #include "xfa/fwl/core/cfwl_widgetmgr.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/ifwl_app.h"
 #include "xfa/fwl/core/ifwl_checkbox.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 
@@ skipping 330 matching lines @@
       m_pProperties->m_dwStates &= ~FWL_STATE_CKB_CheckMask;
     } else {
       if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CKB_3State)
         m_pProperties->m_dwStates |= FWL_STATE_CKB_Neutral;
       else
         m_pProperties->m_dwStates |= FWL_STATE_CKB_Checked;
     }
   }
 
   Repaint(&m_rtClient);
-  if (dwFirststate != m_pProperties->m_dwStates) {
-    CFWL_EvtCkbCheckStateChanged wmCheckBoxState;
-    wmCheckBoxState.m_pSrcTarget = this;
-    DispatchEvent(&wmCheckBoxState);
-  }
+  if (dwFirststate == m_pProperties->m_dwStates)
+    return;
+
+  CFWL_EvtCheckStateChanged wmCheckBoxState;
+  wmCheckBoxState.m_pSrcTarget = this;
+  DispatchEvent(&wmCheckBoxState);
 }
 
 void IFWL_CheckBox::OnProcessMessage(CFWL_Message* pMessage) {
   if (!pMessage)
     return;
 
   switch (pMessage->GetClassID()) {
     case CFWL_MessageType::SetFocus:
       OnFocusChanged(true);
       break;
@@ skipping 121 matching lines @@
 void IFWL_CheckBox::OnKeyDown(CFWL_MsgKey* pMsg) {
   if (pMsg->m_dwKeyCode == FWL_VKEY_Tab) {
     DispatchKeyEvent(pMsg);
     return;
   }
   if (pMsg->m_dwKeyCode == FWL_VKEY_Return ||
       pMsg->m_dwKeyCode == FWL_VKEY_Space) {
     NextStates();
   }
 }