Editor code: tidy up BOOLs,NULLs and overrides pt1.

Merge pull request #2872 from nemerle/tidy_up_editor_code_a_bit_split1

Code/Editor/Controls/ReflectedPropertyControl/ReflectedPropertiesPanel.cpp

@@ -27,7 +27,7 @@ void ReflectedPropertiesPanel::DeleteVars()
 {
     ClearVarBlock();
     m_updateCallbacks.clear();
-    m_varBlock = 0;
+    m_varBlock = nullptr;
 }
 
 //////////////////////////////////////////////////////////////////////////

Code/Editor/Controls/ReflectedPropertyControl/ReflectedPropertyCtrl.cpp

@@ -198,7 +198,7 @@ void ReflectedPropertyControl::CreateItems(XmlNodeRef node)
 
 void ReflectedPropertyControl::CreateItems(XmlNodeRef node, CVarBlockPtr& outBlockPtr, IVariable::OnSetCallback* func, bool splitCamelCaseIntoWords)
 {
-    SelectItem(0);
+    SelectItem(nullptr);
 
     outBlockPtr = new CVarBlock;
     for (size_t i = 0, iGroupCount(node->getChildCount()); i < iGroupCount; ++i)
@@ -505,7 +505,7 @@ void ReflectedPropertyControl::RemoveAllItems()
 void ReflectedPropertyControl::ClearVarBlock()
 {
     RemoveAllItems();
-    m_pVarBlock = 0;
+    m_pVarBlock = nullptr;
 }
 
 void ReflectedPropertyControl::RecreateAllItems()
@@ -688,11 +688,11 @@ void ReflectedPropertyControl::OnItemChange(ReflectedPropertyItem *item, bool de
     // callback until after the current event queue is processed, so that we aren't changing other widgets
     // as a ton of them are still being created.
     Qt::ConnectionType connectionType = deferCallbacks ? Qt::QueuedConnection : Qt::DirectConnection;
-    if (m_updateVarFunc != 0 && m_bEnableCallback)
+    if (m_updateVarFunc && m_bEnableCallback)
     {
         QMetaObject::invokeMethod(this, "DoUpdateCallback", connectionType, Q_ARG(IVariable*, item->GetVariable()));
     }
-    if (m_updateObjectFunc != 0 && m_bEnableCallback)
+    if (m_updateObjectFunc && m_bEnableCallback)
     {
         // KDAB: This callback has same signature as DoUpdateCallback. I think the only reason there are 2 is because some
         // EntityObject registers callback and some derived objects want to register their own callback. the normal UpdateCallback
@@ -709,7 +709,7 @@ void ReflectedPropertyControl::DoUpdateCallback(IVariable *var)
     const bool variableStillExists = FindVariable(var);
     AZ_Assert(variableStillExists, "This variable and the item containing it were destroyed during a deferred callback. Change to non-deferred callback.");
 
-    if (m_updateVarFunc == 0 || !variableStillExists)
+    if (!m_updateVarFunc || !variableStillExists)
     {
         return;
     }
@@ -724,7 +724,7 @@ void ReflectedPropertyControl::DoUpdateObjectCallback(IVariable *var)
     const bool variableStillExists = FindVariable(var);
     AZ_Assert(variableStillExists, "This variable and the item containing it were destroyed during a deferred callback. Change to non-deferred callback.");
 
-    if (m_updateVarFunc == 0 || !variableStillExists)
+    if ( !m_updateVarFunc || !variableStillExists)
     {
         return;
     }
@@ -904,7 +904,7 @@ void ReflectedPropertyControl::SetUndoCallback(UndoCallback &callback)
 
 void ReflectedPropertyControl::ClearUndoCallback()
 {
-    m_undoFunc = 0;
+    m_undoFunc = nullptr;
 }
 
 bool ReflectedPropertyControl::FindVariable(IVariable *categoryItem) const

Code/Editor/Controls/ReflectedPropertyControl/ReflectedPropertyItem.cpp

@@ -82,7 +82,7 @@ public:
     }
 
     //helps implement ReflectedPropertyControl::ReplaceVarBlock
-    void ReplaceVarBlock(CVarBlock *varBlock)
+    void ReplaceVarBlock(CVarBlock *varBlock) override
     {
         m_containerVar->Clear();
         UpdateCommon(m_item->GetVariable(), varBlock);
@@ -207,7 +207,7 @@ void ReflectedPropertyItem::SetVariable(IVariable *var)
         ReleaseVariable();
 
     m_pVariable = pInputVar;
-    assert(m_pVariable != NULL);
+    assert(m_pVariable != nullptr);
 
     m_pVariable->AddOnSetCallback(&m_onSetCallback);
     m_pVariable->AddOnSetEnumCallback(&m_onSetEnumCallback);
@@ -332,7 +332,7 @@ void ReflectedPropertyItem::RemoveAllChildren()
 {
     for (int i = 0; i < m_childs.size(); i++)
     {
-        m_childs[i]->m_parent = 0;
+        m_childs[i]->m_parent = nullptr;
     }
 
     m_childs.clear();
@@ -473,7 +473,7 @@ void ReflectedPropertyItem::ReleaseVariable()
         m_pVariable->RemoveOnSetCallback(&m_onSetCallback);
         m_pVariable->RemoveOnSetEnumCallback(&m_onSetEnumCallback);
     }
-    m_pVariable = 0;
+    m_pVariable = nullptr;
     delete m_reflectedVarAdapter;
     m_reflectedVarAdapter = nullptr;
 }

Code/Editor/Controls/ReflectedPropertyControl/ReflectedVarWrapper.cpp

@@ -473,7 +473,7 @@ void ReflectedVarUserAdapter::SyncReflectedVarToIVar(IVariable *pVariable)
 
     //extract the list of custom items from the IVariable user data
     IVariable::IGetCustomItems* pGetCustomItems = static_cast<IVariable::IGetCustomItems*> (pVariable->GetUserData().value<void *>());
-    if (pGetCustomItems != 0)
+    if (pGetCustomItems != nullptr)
     {
         std::vector<IVariable::IGetCustomItems::SItem> items;
         QString dlgTitle;