enable UI actions with appropriate selection

example/sACN Explorer/multiverseitem.cpp

@@ -156,7 +156,7 @@ QVariant MultiverseItem::data(int column, int role) const
       if (universe_)
         return QVariant(QVariant::fromValue(universe_));
       if (discovery_)
-        return QVariant(QVariant::fromValue(static_cast<void*>(discovery_)));
+        return QVariant(QVariant::fromValue(discovery_));
       return data(column, Qt::DisplayRole);
     default:
       return QVariant();

example/sACN Explorer/multiverseview.cpp

@@ -18,6 +18,10 @@ MultiverseView::MultiverseView(QWidget *parent, QSacnNode *node)
   ui->multiverseView->setModel(new MultiverseModel(this, node));
   ui->multiverseView->setItemDelegate(new UniverseViewDelegate(this, node));
   ui->multiverseView->expandAll();
+
+  connect(ui->multiverseView->selectionModel(),
+          &QItemSelectionModel::currentChanged,
+          this, &MultiverseView::selectionChanged);
 }
 
 
@@ -28,3 +32,32 @@ MultiverseView::~MultiverseView()
 {
     delete ui;
 }
+
+
+/**
+ * @brief MultiverseView::selectionChanged
+ * @param selected
+ * @param deselected
+ */
+void MultiverseView::selectionChanged(const QModelIndex &current,
+                                      const QModelIndex &previous)
+{
+  Q_UNUSED(previous)
+
+  ui->actionTerminate->setEnabled(false);
+  ui->actionUnsubscribe->setEnabled(false);
+
+  auto item = static_cast<MultiverseItem*>(current.internalPointer());
+  auto data = item->data(0, Qt::EditRole);
+  if (!data.isValid())
+    return;
+  if (data.metaType().id() == qMetaTypeId<QSacnUniverse*>())
+    {
+      auto univ = data.value<QSacnUniverse*>();
+      if (univ->isEditable())
+        ui->actionTerminate->setEnabled(true);
+      else
+        ui->actionUnsubscribe->setEnabled(true);
+      return;
+    }
+}

example/sACN Explorer/multiverseview.h

@@ -42,6 +42,9 @@ public:
                           QSacnNode* node = nullptr);
   virtual ~MultiverseView();
 
+public slots:
+  void selectionChanged(const QModelIndex &current, const QModelIndex &previous);
+
 private:
   Ui::MultiverseView *ui;
 };