Convert FWL_SCBCODE to an enum class

xfa/fwl/core/ifwl_edit.cpp

Index: xfa/fwl/core/ifwl_edit.cpp
diff --git a/xfa/fwl/core/ifwl_edit.cpp b/xfa/fwl/core/ifwl_edit.cpp
index 79896ea6367b50323abb172295aff55ccb4ff000..1679a5b16d95163f466aa5d8d8519eac13ae2fad 100644
--- a/xfa/fwl/core/ifwl_edit.cpp
+++ b/xfa/fwl/core/ifwl_edit.cpp
@@ -1928,56 +1928,55 @@ void IFWL_Edit::OnChar(CFWL_MsgKey* pMsg) {
 }
 
 bool IFWL_Edit::OnScroll(IFWL_ScrollBar* pScrollBar,
-                         uint32_t dwCode,
+                         FWL_SCBCODE dwCode,
                          FX_FLOAT fPos) {
   CFX_SizeF fs;
   pScrollBar->GetRange(&fs.x, &fs.y);
   FX_FLOAT iCurPos = pScrollBar->GetPos();
   FX_FLOAT fStep = pScrollBar->GetStepSize();
   switch (dwCode) {
-    case FWL_SCBCODE_Min: {
+    case FWL_SCBCODE::Min: {
       fPos = fs.x;
       break;
     }
-    case FWL_SCBCODE_Max: {
+    case FWL_SCBCODE::Max: {
       fPos = fs.y;
       break;
     }
-    case FWL_SCBCODE_StepBackward: {
+    case FWL_SCBCODE::StepBackward: {
       fPos -= fStep;
       if (fPos < fs.x + fStep / 2) {
         fPos = fs.x;
       }
       break;
     }
-    case FWL_SCBCODE_StepForward: {
+    case FWL_SCBCODE::StepForward: {
       fPos += fStep;
       if (fPos > fs.y - fStep / 2) {
         fPos = fs.y;
       }
       break;
     }
-    case FWL_SCBCODE_PageBackward: {
+    case FWL_SCBCODE::PageBackward: {
       fPos -= pScrollBar->GetPageSize();
       if (fPos < fs.x) {
         fPos = fs.x;
       }
       break;
     }
-    case FWL_SCBCODE_PageForward: {
+    case FWL_SCBCODE::PageForward: {
       fPos += pScrollBar->GetPageSize();
       if (fPos > fs.y) {
         fPos = fs.y;
       }
       break;
     }
-    case FWL_SCBCODE_Pos:
-    case FWL_SCBCODE_TrackPos:
+    case FWL_SCBCODE::Pos:
+    case FWL_SCBCODE::TrackPos:
+    case FWL_SCBCODE::None:
       break;
-    case FWL_SCBCODE_EndScroll:
+    case FWL_SCBCODE::EndScroll:
       return false;
-    default:
-      break;
   }
   if (iCurPos != fPos) {
     pScrollBar->SetPos(fPos);