Class CollapseAllHandler

All Implemented Interfaces:
IHandler, IHandler2

public class CollapseAllHandler extends AbstractHandler
Collapse a tree viewer.

It can be used in a part's createPartControl(Composite) method:

 IHandlerService handlerService = (IHandlerService) getSite().getService(IHandlerService.class);
 collapseHandler = new CollapseAllHandler(myViewer);
 handlerService.activateHandler(CollapseAllHandler.COMMAND_ID, collapseHandler);

The part should dispose the handler in its own dispose() method. The part can provide its own collapse all handler if desired, or if it needs to delegate to multiple tree viewers.

Note: This class can be instantiated. It should not be subclasses.

  • Field Details

  • Constructor Details

    • CollapseAllHandler

      public CollapseAllHandler(AbstractTreeViewer viewer)
      Create the handler for this tree viewer.
      viewer - The viewer to collapse. Must not be null.
  • Method Details

    • execute

      public Object execute(ExecutionEvent event)
      Description copied from interface: IHandler
      Executes with the map of parameter values by name.
      event - An event containing all the information about the current state of the application; must not be null.
      the result of the execution. Reserved for future use, must be null.
    • dispose

      public void dispose()
      Description copied from class: AbstractHandler
      The default implementation does nothing. Subclasses who attach listeners to other objects are encouraged to detach them in this method.
      Specified by:
      dispose in interface IHandler
      dispose in class AbstractHandler