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

/**
 * Updates the outline with new content.
 * 
 * @param content The new content of the outline
 */    
//public void update(Hashtable<String, BibStringTriMap<ReferenceEntry>> sortIndex) {
public void update(BibOutlineContainer content) {
    this.content = content;

    TreeViewer viewer = getTreeViewer();
    //this.sortIndex = sortIndex;
    
    if (viewer != null) {
        Control control = viewer.getControl();
        if (control != null && !control.isDisposed()) {
            control.setRedraw(false);
            viewer.setInput(this.content);
            //viewer.setInput(sortIndex);
            control.setRedraw(true);
        }
    }
}
 

/**
 * The editor is saved, so we should refresh representation
 * 
 * @param tableNamePositions
 */
public void update()
{
	//set the input so that the outlines parse can be called
	//update the tree viewer state
	TreeViewer viewer = getTreeViewer();

	if (viewer != null)
	{
		Control control = viewer.getControl();
		if (control != null && !control.isDisposed())
		{
			try{
				control.setRedraw(false);
				viewer.setInput(input);
			}
			finally{
				control.setRedraw(true);
			}
		}
	}
}
 

/**
 * Updates the outline with new content. Called by TexDocumentModel
 * through the editor. Saves the visible state of the outline,
 * sets the new content and restores the state.
 *
 * @param input the new outline input
 */
public void update(TexOutlineInput input) {
    this.input = input;
    
    TreeViewer viewer= getTreeViewer();
    if (viewer != null) {
        
        Control control= viewer.getControl();
        if (control != null && !control.isDisposed()) {
            control.setRedraw(false);
                            
            //First try smart update
            boolean succUpdate = ((TexContentProvider) viewer.getContentProvider()).updateElements(viewer, input.getRootNodes());
            if (!succUpdate) {
                viewer.getTree().deselectAll();
                // save viewer state
            	Object[] expandedElements = viewer.getExpandedElements();
                // set new input
            	viewer.setInput(input.getRootNodes());
                /*viewer.getContentProvider().inputChanged(viewer, null, input.getRootNodes());
                viewer.refresh(true);*/
                // restore viewer state
            	viewer.setExpandedElements(expandedElements);
            }
            control.setRedraw(true);
            
            // disable the refresh button, enable context stuff
            outlineActions.get(ACTION_UPDATE).setEnabled(false);
            outlineActions.get(ACTION_COPY).setEnabled(true);
            outlineActions.get(ACTION_CUT).setEnabled(true);
            outlineActions.get(ACTION_PASTE).setEnabled(true);
            outlineActions.get(ACTION_DELETE).setEnabled(true);
        }
    }
}
 

protected void update() {
    final IDocument document = documentProvider.getDocument(currentInput);

    if (document instanceof JsonDocument) {
        final Model model = ((JsonDocument) document).getModel();
        if (model == null) {
            return;
        }

        final TreeViewer viewer = getTreeViewer();

        if (viewer != null && viewer.getControl() != null && !viewer.getControl().isDisposed()) {
            // we keep all elements that have been previously expanded
            // so the tree stay in the same state between updates.
            final Object[] expandedElements = viewer.getExpandedElements();
            final List<Object> elements = expandedElements != null ? Arrays.asList(expandedElements) : null;

            viewer.setInput(model);

            if (elements != null && !elements.isEmpty()) {
                List<AbstractNode> newElements = new ArrayList<>();
                model.allNodes().forEach(node -> {
                    if (elements.contains(node))
                        newElements.add(node);
                });
                viewer.setExpandedElements(newElements.toArray());
            }
        }
    }
}
 

public Control createControl(Composite parent) {
    fPackageViewer= new TreeViewer(parent, SWT.MULTI);
    fPackageViewer.setComparer(WorkingSetModel.COMPARER);
    fPackageViewer.addFilter(new PackageFilter());
    fPackageViewer.setComparator(new ExtendedJavaElementSorter());
    fPackageViewer.addDoubleClickListener(new IDoubleClickListener() {
        public void doubleClick(DoubleClickEvent event) {
            Object element= ((IStructuredSelection)event.getSelection()).getFirstElement();
            if (fPackageViewer.isExpandable(element)) {
                fPackageViewer.setExpandedState(element, !fPackageViewer.getExpandedState(element));
            } else {
            	if (element instanceof CPListElementAttribute) {
		CPListElementAttribute attribute= (CPListElementAttribute)element;
            		if (attribute.getKey().equals(CPListElement.OUTPUT)) {
            			fActionGroup.getEditOutputFolderAction().run();
            		}
            	}
            }
        }
    });

    MenuManager menuMgr= new MenuManager("#PopupMenu"); //$NON-NLS-1$
    menuMgr.setRemoveAllWhenShown(true);
    menuMgr.addMenuListener(this);
    fContextMenu= menuMgr.createContextMenu(fPackageViewer.getTree());
    fPackageViewer.getTree().setMenu(fContextMenu);
    parent.addDisposeListener(new DisposeListener() {
        public void widgetDisposed(DisposeEvent e) {
            fContextMenu.dispose();
        }
    });

    return fPackageViewer.getControl();
}
 

@Override
public void createPartControl(Composite parent) {

	FillLayout fillLayout = new FillLayout(SWT.VERTICAL);
	fillLayout.marginHeight = 5;
	fillLayout.marginWidth = 5;
	parent.setLayout(fillLayout);

	// main container
	container = new Composite(parent, SWT.BORDER);
	container.setLayout(new FillLayout());

	// create container for stack trace data
	Composite stacktraceDataContainer = new Composite(parent, SWT.BORDER);

	FormLayout formLayout = new FormLayout();
	formLayout.marginHeight = 5;
	formLayout.marginWidth = 5;
	formLayout.spacing = 5;
	stacktraceDataContainer.setLayout(formLayout);

	Composite stackLabelContainer = new Composite(stacktraceDataContainer, SWT.NO_SCROLL | SWT.SHADOW_NONE);
	stackLabelContainer.setLayout(new GridLayout());

	FormData stackLabelFormData = new FormData();
	stackLabelFormData.top = new FormAttachment(0);
	stackLabelFormData.left = new FormAttachment(0);
	stackLabelFormData.right = new FormAttachment(100);
	stackLabelFormData.bottom = new FormAttachment(20);
	stackLabelContainer.setLayoutData(stackLabelFormData);

	Composite stackTraceContainer = new Composite(stacktraceDataContainer, SWT.NO_SCROLL | SWT.SHADOW_NONE);
	stackTraceContainer.setLayout(new FillLayout());

	FormData stackTraceFormData = new FormData();
	stackTraceFormData.top = new FormAttachment(stackLabelContainer);
	stackTraceFormData.left = new FormAttachment(0);
	stackTraceFormData.right = new FormAttachment(100);
	stackTraceFormData.bottom = new FormAttachment(100);
	stackTraceContainer.setLayoutData(stackTraceFormData);

	// Create viewer for test tree in main container
	testTreeViewer = new TreeViewer(container);
	testTreeViewer.setContentProvider(new XpectContentProvider());
	testTreeViewer.setLabelProvider(new XpectLabelProvider(this.testsExecutionStatus));
	testTreeViewer.setInput(null);

	// create stack trace label
	stacktraceLabel = new Label(stackLabelContainer, SWT.SHADOW_OUT);
	FontData fontData = stacktraceLabel.getFont().getFontData()[0];
	Display display = Display.getCurrent();
	// may be null if outside the UI thread
	if (display == null)
		display = Display.getDefault();
	Font font = new Font(display, new FontData(fontData.getName(), fontData
			.getHeight(), SWT.BOLD));
	// Make stack trace label bold
	stacktraceLabel.setFont(font);

	stacktraceLabel.setText(NO_TRACE_MSG);

	// create stack trace console
	MessageConsole messageConsole = new MessageConsole("trace", null);
	stacktraceConsole = new TraceConsole(messageConsole);
	stacktraceConsoleViewer = new TextConsoleViewer(stackTraceContainer, messageConsole);

	// context menu
	getSite().setSelectionProvider(testTreeViewer);
	MenuManager contextMenu = new MenuManager();
	contextMenu.setRemoveAllWhenShown(true);
	getSite().registerContextMenu(contextMenu, testTreeViewer);
	Control control = testTreeViewer.getControl();
	Menu menu = contextMenu.createContextMenu(control);
	control.setMenu(menu);
	activateContext();

	createSelectionActions();

}