ScxmlEditor: silent fallthrough warnings

Change-Id: I7bd7140f05e8342a2e10713eb1646e0bd3f028ff
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

src/plugins/scxmleditor/common/stateproperties.cpp

@@ -30,6 +30,7 @@
 #include "scxmluifactory.h"
 
 #include <coreplugin/minisplitter.h>
+#include <utils/qtcfallthrough.h>
 
 #include <QHeaderView>
 #include <QLabel>
@@ -84,6 +85,7 @@ void StateProperties::tagChange(ScxmlDocument::TagChange change, ScxmlTag *tag,
     case ScxmlDocument::TagContentChanged:
         if (tag != m_tag)
             return;
+        Q_FALLTHROUGH();
     case ScxmlDocument::TagCurrentChanged:
         setTag(tag);
         break;

src/plugins/scxmleditor/plugin_interface/connectableitem.cpp

@@ -33,6 +33,8 @@
 #include "serializer.h"
 #include "stateitem.h"
 
+#include <utils/qtcfallthrough.h>
+
 #include <QDebug>
 #include <QPainter>
 #include <QPen>
@@ -491,7 +493,7 @@ QVariant ConnectableItem::itemChange(GraphicsItemChange change, const QVariant &
     case ItemParentHasChanged:
         updateTransitions(true);
         updateTransitionAttributes(true);
-        // FIXME: intended fallthrough?
+        Q_FALLTHROUGH();
     case ItemPositionHasChanged:
         if (!m_releasedFromParent && !blockUpdates())
             checkParentBoundingRect();

src/plugins/scxmleditor/plugin_interface/graphicsscene.cpp

@@ -541,7 +541,7 @@ void GraphicsScene::endTagChange(ScxmlDocument::TagChange change, ScxmlTag *tag,
                 item->finalizeCreation();
         }
     }
-    // FIXME: intended fallthrough?
+    break;
     case ScxmlDocument::TagAddChild: {
         ScxmlTag *childTag = tag->child(value.toInt());
         if (childTag) {

src/plugins/scxmleditor/plugin_interface/scattributeitemmodel.cpp

@@ -26,6 +26,8 @@
 #include "scattributeitemmodel.h"
 #include "mytypes.h"
 
+#include <utils/qtcfallthrough.h>
+
 #include <QBrush>
 
 using namespace ScxmlEditor::PluginInterface;
@@ -91,6 +93,7 @@ QVariant SCAttributeItemModel::data(const QModelIndex &index, int role) const
     case Qt::DisplayRole:
         if (bExtraRow)
             return index.column() == 0 ? tr("- name -") : tr(" - value -");
+        Q_FALLTHROUGH();
     case Qt::EditRole: {
         if (index.column() == 0) {
             if (bEditable) {