Debugger/Utils: Remove TwoLevelTreeModel

It's well covered by the more generic Utils::LeveledTreeModel now.

Change-Id: I3982ad39a64742b0a0a59433024457db3808bfc7
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/utils/treemodel.h

@@ -279,24 +279,6 @@ public:
     }
 };
 
-// A two-level model with a first level of static headers and a uniform second level.
-template <class SecondLevelItemType>
-class TwoLevelTreeModel : public LeveledTreeModel<StaticTreeItem, SecondLevelItemType>
-{
-public:
-    using FirstLevelItem = StaticTreeItem;
-    using SecondLevelItem = SecondLevelItemType;
-    using BaseType = LeveledTreeModel<FirstLevelItem, SecondLevelItem>;
-
-    explicit TwoLevelTreeModel(QObject *parent = 0) : BaseType(parent) {}
-
-    FirstLevelItem *appendFirstLevelItem(const QStringList &display) {
-        auto item = new FirstLevelItem(display);
-        this->rootItem()->appendChild(item);
-        return item;
-    }
-};
-
 // A model where all non-root nodes are the same.
 template <class ItemType>
 class UniformTreeModel : public LeveledTreeModel<ItemType, ItemType, ItemType>

src/plugins/debugger/debuggeroptionspage.cpp

@@ -99,7 +99,7 @@ public:
 // DebuggerItemModel
 // --------------------------------------------------------------------------
 
-class DebuggerItemModel : public TwoLevelTreeModel<DebuggerTreeItem>
+class DebuggerItemModel : public LeveledTreeModel<StaticTreeItem, DebuggerTreeItem>
 {
     Q_DECLARE_TR_FUNCTIONS(Debugger::DebuggerOptionsPage)
 
@@ -115,18 +115,17 @@ public:
     void apply();
 
 private:
-    DebuggerTreeItem *m_currentTreeItem;
+    DebuggerTreeItem *m_currentTreeItem = nullptr;
     QStringList removed;
 
     QList<QVariant> m_removedItems;
 };
 
 DebuggerItemModel::DebuggerItemModel()
-    : m_currentTreeItem(0)
 {
     setHeader({ tr("Name"), tr("Location"), tr("Type") });
-    appendFirstLevelItem({ tr("Auto-detected") });
-    appendFirstLevelItem({ tr("Manual") });
+    rootItem()->appendChild(new StaticTreeItem(tr("Auto-detected")));
+    rootItem()->appendChild(new StaticTreeItem(tr("Manual")));
     foreach (const DebuggerItem &item, DebuggerItemManager::debuggers())
         addDebugger(item, false);
 }
@@ -134,7 +133,7 @@ DebuggerItemModel::DebuggerItemModel()
 void DebuggerItemModel::addDebugger(const DebuggerItem &item, bool changed)
 {
     int group = item.isAutoDetected() ? 0 : 1;
-    rootItem()->child(group)->appendChild(new DebuggerTreeItem(item, changed));
+    rootItem()->childAt(group)->appendChild(new DebuggerTreeItem(item, changed));
 }
 
 void DebuggerItemModel::updateDebugger(const DebuggerItem &item)