Interface ISelectionService

  • All Known Subinterfaces:
    IWorkbenchPage

    public interface ISelectionService
    A selection service tracks the selection within an object.

    A listener that wants to be notified when the selection becomes null must implement the INullSelectionListener interface.

    This service can be acquired from your service locator:

     ISelectionService service = (ISelectionService) getSite().getService(ISelectionService.class);
     
    This service is not available globally, only from the workbench window level down.
    See Also:
    ISelectionListener, INullSelectionListener, IServiceLocator.getService(Class)
    Restriction:
    This interface is not intended to be implemented by clients.
    • Method Detail

      • addSelectionListener

        void addSelectionListener​(ISelectionListener listener)
        Adds the given selection listener. Has no effect if an identical listener is already registered.

        Note: listeners should be removed when no longer necessary. If not, they will be removed when the IServiceLocator used to acquire this service is disposed.

        Parameters:
        listener - a selection listener
        See Also:
        removeSelectionListener(ISelectionListener)
      • addSelectionListener

        void addSelectionListener​(String partId,
                                  ISelectionListener listener)
        Adds a part-specific selection listener which is notified when selection changes in the part with the given id. This is independent of part activation - the part need not be active for notification to be sent.

        When the part is created, the listener is passed the part's initial selection. When the part is disposed, the listener is passed a null selection, but only if the listener implements INullSelectionListener.

        Note: This will not correctly track editor parts as each editor does not have a unique partId.

        Note: listeners should be removed when no longer necessary. If not, they will be removed when the IServiceLocator used to acquire this service is disposed.

        Parameters:
        partId - the id of the part to track
        listener - a selection listener
        Since:
        2.0
        See Also:
        removeSelectionListener(String, ISelectionListener)
      • addPostSelectionListener

        void addPostSelectionListener​(ISelectionListener listener)
        Adds the given post selection listener.It is equivalent to selection changed if the selection was triggered by the mouse but it has a delay if the selection is triggered by the keyboard arrows. Has no effect if an identical listener is already registered. Note: Works only for StructuredViewer(s).

        Note: listeners should be removed when no longer necessary. If not, they will be removed when the IServiceLocator used to acquire this service is disposed.

        Parameters:
        listener - a selection listener
        See Also:
        removePostSelectionListener(ISelectionListener)
      • addPostSelectionListener

        void addPostSelectionListener​(String partId,
                                      ISelectionListener listener)
        Adds a part-specific selection listener which is notified when selection changes in the part with the given id. This is independent of part activation - the part need not be active for notification to be sent.

        When the part is created, the listener is passed the part's initial selection. When the part is disposed, the listener is passed a null selection, but only if the listener implements INullSelectionListener.

        Note: This will not correctly track editor parts as each editor does not have a unique partId.

        Note: listeners should be removed when no longer necessary. If not, they will be removed when the IServiceLocator used to acquire this service is disposed.

        Parameters:
        partId - the id of the part to track
        listener - a selection listener
        Since:
        2.0
        See Also:
        removePostSelectionListener(String, ISelectionListener)
      • getSelection

        ISelection getSelection()
        Returns the current selection in the active part. If the selection in the active part is undefined (the active part has no selection provider) the result will be null.
        Returns:
        the current selection, or null if undefined
      • getSelection

        ISelection getSelection​(String partId)
        Returns the current selection in the part with the given id. If the part is not open, or if the selection in the active part is undefined (the active part has no selection provider) the result will be null.
        Parameters:
        partId - the id of the part
        Returns:
        the current selection, or null if undefined
        Since:
        2.0
      • removeSelectionListener

        void removeSelectionListener​(ISelectionListener listener)
        Removes the given selection listener. Has no effect if an identical listener is not registered.
        Parameters:
        listener - a selection listener
      • removeSelectionListener

        void removeSelectionListener​(String partId,
                                     ISelectionListener listener)
        Removes the given part-specific selection listener. Has no effect if an identical listener is not registered for the given part id.
        Parameters:
        partId - the id of the part to track
        listener - a selection listener
        Since:
        2.0
      • removePostSelectionListener

        void removePostSelectionListener​(ISelectionListener listener)
        Removes the given post selection listener. Has no effect if an identical listener is not registered.
        Parameters:
        listener - a selection listener
      • removePostSelectionListener

        void removePostSelectionListener​(String partId,
                                         ISelectionListener listener)
        Removes the given part-specific post selection listener. Has no effect if an identical listener is not registered for the given part id.
        Parameters:
        partId - the id of the part to track
        listener - a selection listener
        Since:
        2.0