org.eclipse.jface.viewers.TreeViewer#getInput ( )源码实例Demo

public void createContextMenu( TreeViewer sourceViewer, Object object,
		IMenuManager menu )
{
	menu.add( new RefreshModuleHandleAction( object ) );
	if ( sourceViewer.getInput( ) instanceof Object[] )
	{
		Object[] inputs = (Object[]) sourceViewer.getInput( );
		if ( inputs.length == 1 )
		{
			if ( object instanceof LibraryHandle )
			{
				LibraryHandle handle = ( (LibraryHandle) object );

				if ( handle.getNamespace( ) == null )
				{
					menu.add( new PublishLibraryToResourceFolderAction( object ) );
				}

				if ( handle.getNamespace( ) != null )
				{
					menu.add( new RemoveLibraryAction( object ) );
				}
			}
		}
	}
}
 

/**
 * @param view
 * @param typeNames
 * @return
 */
protected IAction createAction(final IndexView view, final List<String> typeNames)
{
	IAction action = new Action()
	{
		@Override
		public void run()
		{
			TreeViewer treeViewer = view.getTreeViewer();

			if (treeViewer != null)
			{
				Object input = treeViewer.getInput();

				if (input instanceof IProject)
				{
					IProject project = (IProject) input;

					JSIndexQueryHelper queryHelper = new JSIndexQueryHelper(project);
					Collection<TypeElement> types = queryHelper.getTypes(typeNames.get(0), true);
					List<ClassElement> classes = JSTypeUtil.typesToClasses(types);

					if (!CollectionsUtil.isEmpty(classes))
					{
						ClassElement c = classes.get(0);

						treeViewer.setSelection(new StructuredSelection(c), true);
					}
				}
			}
		}
	};

	action.setText(Messages.JSIndexViewActionProvider_JumpToType);

	return action;
}
 

protected void awaitForTreeViewer(TreeViewer treeViewer) {
	long waitTime = 0;
	while (treeViewer.getInput() == null && waitTime < EXPECTED_TIMEOUT) {
		waitTime += 10;
		if (Display.getCurrent() != null)
			Display.getCurrent().readAndDispatch();
	}
}
 

@SuppressWarnings("unchecked")
private List<XViewerColumn> getTableXViewerColumns(TreeViewer xColTableViewer) {
   return (List<XViewerColumn>) xColTableViewer.getInput();
}
 

/**
 * Builds the context menu. Single selection menu and multiple selection
 * menu are created while selecting just single element or multiple elements
 * 
 * 
 * @param menu
 *            the menu
 */
public void buildContextMenu( IMenuManager menu )
{
	menu.add( new Separator( IWorkbenchActionConstants.MB_ADDITIONS ) );
	TreeViewer treeViewer = (TreeViewer) getViewer( );

	IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection( );

	// temporary solution
	Object input = treeViewer.getInput( );
	if ( input instanceof Object[] )
	{
		Object[] inputs = (Object[]) input;
		if ( inputs.length == 1 && inputs[0] instanceof ReportDesignHandle )
		{
			for ( Iterator iter = selection.iterator( ); iter.hasNext( ); )
			{
				if ( isIncludedLibrary( iter.next( ) ) )
				{
					return;
				}
			}
		}
	}

	if ( selection.size( ) == 1 )
	{
		// Create Single Selection Menu
		Object obj = selection.getFirstElement( );
		if ( ProviderFactory.createProvider( obj ) != null )
		{
			ProviderFactory.createProvider( obj )
					.createContextMenu( treeViewer, obj, menu );
		}
		if ( Policy.TRACING_MENU_SHOW )
		{
			System.out.println( "Menu(for Views) >> Shows for " + ProviderFactory.createProvider( obj ).getNodeDisplayName( obj ) ); //$NON-NLS-1$
		}
	}
	else
	{
		// Added by ywang on 2004.9.15
		// Create Multiple Selection Menu
		if ( ProviderFactory.getDefaultProvider( ) != null)
		{
			ProviderFactory.getDefaultProvider( )
					.createContextMenu( treeViewer, selection, menu );
		}

		if ( Policy.TRACING_MENU_SHOW )
		{
			System.out.println( "Menu(for Views) >> Shows for multi-selcetion." ); //$NON-NLS-1$
		}
	}
}
 

protected IOutlineNode getOutlineRootNode(TreeViewer treeViewer) {
	IOutlineNode rootNode = (IOutlineNode) treeViewer.getInput();
	return rootNode;
}