# Package org.eclipse.viatra.query.tooling.ui.queryexplorer.util

- Class Summary
  Class | Description
  --- | ---
  AttachFileEditorPartListener | The PartListener is used to observe EditorPart close actions.
  BasePartListener | An empty implementation of the `IPartListener` interface.
  CheckStateListener |
  CheckStateProvider | A `ICheckStateProvider` implementation for the patterns viewer in the `QueryExplorer`.
  CommandConstants |
  DisplayUtil | The util contains several useful methods for the query displaying operations.
  DoubleClickListener |
  ModelEditorPartListener | The PartListener is used to observe `IEditorPart` close actions.
  QueryExplorerPatternRegistry | Utility class used by the Query Explorer for the maintenance of registered patterns.
  QueryExplorerResourceChangeListener |