ProjectNodes: Do not derive Project Nodes from QObject

That should save some memory per node, and since creator has a lot of nodes
(e.g. opening the LLVM project adds about 1 000 000 nodes) this should be
noticeable:-)

Calling update inside ProjectTree::currentNode() and rename it to
findCurrentNode() to make sure it is an still existing pointer.
Also, try to reduce the somehow more expensive currentNode() calls
and sprinkle some const around that usage.

Change-Id: I6a7c5db01a71d53d39544d3013cad557d5b96cdc
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/plugins/projectexplorer/projecttree.h b/src/plugins/projectexplorer/projecttree.h
index f1dd160c28..87bcb7216c 100644
--- a/src/plugins/projectexplorer/projecttree.h
+++ b/src/plugins/projectexplorer/projecttree.h
@@ -51,7 +51,7 @@ public:
     static ProjectTree *instance();
 
     static Project *currentProject();
-    static Node *currentNode();
+    static Node *findCurrentNode();
 
     // Integration with ProjectTreeWidget
     static void registerWidget(Internal::ProjectTreeWidget *widget);
@@ -102,7 +102,7 @@ private:
     static ProjectTree *s_instance;
     QList<QPointer<Internal::ProjectTreeWidget>> m_projectTreeWidgets;
     QVector<TreeManagerFunction> m_treeManagers;
-    QPointer<Node> m_currentNode;
+    Node *m_currentNode = nullptr;
     Project *m_currentProject = nullptr;
     Internal::ProjectTreeWidget *m_focusForContextMenu = nullptr;
     Core::Context m_lastProjectContext;