Split fwl/core class pt I.

xfa/fwl/core/ifwl_listbox.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_listbox.h"
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/core/cfwl_msgkey.h"
 #include "xfa/fwl/core/cfwl_msgmouse.h"
 #include "xfa/fwl/core/cfwl_msgmousewheel.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/cfwl_themepart.h"
 #include "xfa/fwl/core/cfwl_themetext.h"
 #include "xfa/fwl/core/ifwl_app.h"
+#include "xfa/fwl/core/ifwl_listboxdp.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 
 namespace {
 
 const int kItemTextMargin = 2;
 
 }  // namespace
 
 IFWL_ListBox::IFWL_ListBox(const IFWL_App* app,
                            std::unique_ptr<CFWL_WidgetProperties> properties,
@@ skipping 1044 matching lines @@
     case FWL_SCBCODE::EndScroll:
       return false;
   }
   if (iCurPos != fPos) {
     pScrollBar->SetPos(fPos);
     pScrollBar->SetTrackPos(fPos);
     Repaint(&m_rtClient);
   }
   return true;
 }