ProjectExplorer: Remove arguments from node change signals

This discourages storing the pointers needlessly. The items
are still easy accessible by the static ProjectTree::currentNode()

Change-Id: I3c0cd019e9fdc382afacbc9d9de3b97d5f58ae1e
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/cmakeprojectmanager/cmakeprojectplugin.cpp

@@ -108,9 +108,10 @@ void CMakeProjectPlugin::extensionsInitialized()
     CMakeToolManager::restoreCMakeTools();
 }
 
-void CMakeProjectPlugin::updateContextActions(ProjectExplorer::Node *node,
-                                              ProjectExplorer::Project *project)
+void CMakeProjectPlugin::updateContextActions()
 {
+    Project *project = ProjectTree::currentProject();
+    Node *node = ProjectTree::currentNode();
     CMakeTargetNode *targetNode = dynamic_cast<CMakeTargetNode *>(node);
     // as targetNode can be deleted while the menu is open, we keep only the
     const QString targetDisplayName = targetNode ? targetNode->displayName() : QString();

src/plugins/cmakeprojectmanager/cmakeprojectplugin.h

@@ -29,11 +29,6 @@
 
 #include <QObject>
 
-namespace ProjectExplorer {
-class Node;
-class Project;
-} // namespace ProjectExplorer
-
 namespace Utils { class ParameterAction; }
 
 namespace CMakeProjectManager {
@@ -69,7 +64,7 @@ private slots:
 #endif
 
 private:
-    void updateContextActions(ProjectExplorer::Node *node, ProjectExplorer::Project *project);
+    void updateContextActions();
 
     Utils::ParameterAction *m_buildTargetContextAction = nullptr;
     QMetaObject::Connection m_actionConnect;