org.eclipse.jface.viewers.CheckboxTreeViewer#setUseHashlookup ( )源码实例Demo

/**
 *	Creates this group's tree viewer.
 * @param parent parent composite
 * @param width the width
 * @param height the height
 */
protected void createTreeViewer(Composite parent, int width, int height) {
	Tree tree= new Tree(parent, SWT.CHECK | SWT.BORDER);
	GridData data= new GridData(GridData.FILL_BOTH);
	data.widthHint= width;
	data.heightHint= height;
	tree.setLayoutData(data);

	fTreeViewer= new CheckboxTreeViewer(tree);
	fTreeViewer.setUseHashlookup(true);
	fTreeViewer.setContentProvider(fTreeContentProvider);
	fTreeViewer.setLabelProvider(fTreeLabelProvider);
	fTreeViewer.addTreeListener(this);
	fTreeViewer.addCheckStateListener(this);
	fTreeViewer.addSelectionChangedListener(this);
}
 

@Override
protected TreeViewer doCreateTreeViewer(Composite parentComposite, int style) {
    fCheckboxTreeViewer = new CheckboxTreeViewer(parentComposite, style);
    fCheckboxTreeViewer.setUseHashlookup(true);
    fCheckboxTreeViewer.addCheckStateListener(event -> {
        if (event.getChecked()) {
            fCheckedObjects.add(event.getElement());
        } else {
            fCheckedObjects.remove(event.getElement());
        }
    });
    return fCheckboxTreeViewer;
}
 

@Override
protected void configureViewer(CheckboxTreeViewer viewer) {
  viewer.setContentProvider(new WorkbenchContentProvider());
  viewer.setLabelProvider(new WorkbenchLabelProvider());
  viewer.setUseHashlookup(true);
  viewer.setSorter(new WorkbenchItemsSorter());
}
 

@Override
protected void configureViewer(CheckboxTreeViewer viewer) {
  viewer.setContentProvider(new RosterContentProvider());
  viewer.setLabelProvider(new TreeLabelProvider());
  viewer.setComparator(new RosterComparator());
  viewer.setUseHashlookup(true);

  checkStateProvider = new RosterCheckStateProvider();
  viewer.setCheckStateProvider(checkStateProvider);
}
 

private void createProcessTree(Composite container) {
	Composite composite = new Composite(container, SWT.NONE);
	composite.setLayout(new FillLayout());
	UI.gridData(composite, true, true);
	viewer = new CheckboxTreeViewer(composite, SWT.MULTI | SWT.BORDER);
	viewer.setUseHashlookup(true);
	viewer.setContentProvider(new NavigationContentProvider());
	viewer.setLabelProvider(new NavigationLabelProvider(false));
	viewer.setInput(Navigator.getNavigationRoot());
	viewer.addCheckStateListener(new NavigationTreeCheck(viewer));
	viewer.addCheckStateListener(this);
	viewer.addFilter(new NavigationTreeFilter());
	viewer.setComparator(new NavigationComparator());
}
 

@Override
public void createControl(Composite parent) {
	Composite container = UI.formComposite(parent);
	setControl(container);
	viewer = new CheckboxTreeViewer(container, SWT.BORDER);
	viewer.setLabelProvider(new Label());
	viewer.setContentProvider(new ContentProvider());
	viewer.setUseHashlookup(true);
	viewer.addCheckStateListener(new SelectionState(this));
	UI.gridData(viewer.getTree(), true, true);
}
 

private void createViewer(Composite composite) {
	viewer = new CheckboxTreeViewer(composite, SWT.VIRTUAL | SWT.MULTI
			| SWT.BORDER);
	viewer.setUseHashlookup(true);
	viewer.getTree().setLayoutData(
			new GridData(SWT.FILL, SWT.FILL, true, true));
	viewer.setContentProvider(new NavigationContentProvider());
	viewer.setLabelProvider(new NavigationLabelProvider(false));
	viewer.setComparator(new NavigationComparator());
	viewer.addFilter(new ModelTypeFilter(types));
	viewer.addCheckStateListener(new ModelSelectionState(this, viewer));
	registerInputHandler(composite);
	ColumnViewerToolTipSupport.enableFor(viewer);
}
 

public void drawOn(Composite comp, FormToolkit tk) {
	tree = new CheckboxTreeViewer(comp,
			SWT.VIRTUAL | SWT.MULTI | SWT.BORDER);
	tree.setUseHashlookup(true);
	tree.setContentProvider(new NavigationContentProvider());
	tree.setLabelProvider(new NavigationLabelProvider(false));
	tree.setComparator(new NavigationComparator());
	tree.addFilter(new ModelTypeFilter(types));
	tree.addCheckStateListener(this);
	ColumnViewerToolTipSupport.enableFor(tree);
	if (tk != null) {
		tk.adapt(tree.getTree());
	}

	// compute a height hint
	GridData data = UI.gridData(tree.getTree(), true, true);
	data.minimumHeight = 120;
	Point p = comp.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	data.heightHint = p.y < 120 ? 120 : p.y;

	if (types == null || types.length == 0)
		return;
	if (types.length == 1) {
		tree.setInput(Navigator.findElement(types[0]));
	} else {
		List<INavigationElement<?>> elems = Arrays.stream(types)
				.map(type -> Navigator.findElement(type))
				.filter(elem -> !elem.getChildren().isEmpty())
				.collect(Collectors.toList());
		tree.setInput(elems);
	}
	tree.expandToLevel(2);
}