Class ObservableSetContentProvider<E>

Type Parameters:
E - type of the values that are provided by this object
All Implemented Interfaces:
IContentProvider, IStructuredContentProvider

public class ObservableSetContentProvider<E> extends Object implements IStructuredContentProvider
A content provider for AbstractTableViewer or AbstractListViewer that provides elements of an IObservableSet when set as the viewer's input. Objects of this class listen for changes to the observable set, and will insert and remove viewer elements to reflect observed changes.
This class is not intended to be subclassed by clients.
  • Constructor Details

    • ObservableSetContentProvider

      public ObservableSetContentProvider()
      Constructs an ObservableSetContentProvider. Must be called from the display thread.
    • ObservableSetContentProvider

      public ObservableSetContentProvider(IViewerUpdater<E> viewerUpdater)
      Constructs an ObservableSetContentProvider with the given viewer updater. Must be called from the display thread.
      viewerUpdater - the viewer updater to use when elements are added or removed from the input observable set.
  • Method Details

    • inputChanged

      public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
      Description copied from interface: IContentProvider
      Notifies this content provider that the given viewer's input has been switched to a different element.

      A typical use for this method is registering the content provider as a listener to changes on the new input (using model-specific means), and deregistering the viewer from the old input. In response to these change notifications, the content provider should update the viewer (see the add, remove, update and refresh methods on the viewers).

      The viewer should not be updated during this call, as it might be in the process of being disposed.

      The default implementation does nothing.

      Specified by:
      inputChanged in interface IContentProvider
      viewer - the viewer
      oldInput - the old input element, or null if the viewer did not previously have an input
      newInput - the new input element, or null if the viewer does not have an input
    • getElements

      public Object[] getElements(Object inputElement)
      Description copied from interface: IStructuredContentProvider
      Returns the elements to display in the viewer when its input is set to the given element. These elements can be presented as rows in a table, items in a list, etc. The result is not modified by the viewer.
      Specified by:
      getElements in interface IStructuredContentProvider
      inputElement - the input element
      the array of elements to display in the viewer
    • dispose

      public void dispose()
      Disposes of this content provider. This is called by the viewer when a content provider is replaced, or when the viewer itself is disposed.

      The viewer should not be updated during this call, as it is in the process of being disposed.

      Note: Data binding content providers become unusable on disposal.

      Specified by:
      dispose in interface IContentProvider
    • getKnownElements

      public IObservableSet<E> getKnownElements()
      Returns the set of elements known to this content provider. Label providers may track this set if they need to be notified about additions before the viewer sees the added element, and notified about removals after the element was removed from the viewer. This is intended for use by label providers, as it will always return the items that need labels.
      unmodifiable set of items that will need labels
    • getRealizedElements

      public IObservableSet<E> getRealizedElements()
      Returns the set of known elements which have been realized in the viewer. Clients may track this set in order to perform custom actions on elements while they are known to be present in the viewer.
      the set of known elements which have been realized in the viewer.