| package org.eclipse.jface.tests.viewers.interactive; |
| |
| import org.eclipse.jface.tests.viewers.TestElement; |
| import org.eclipse.jface.tests.viewers.TestModelLazyTreeContentProvider; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.Listener; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.TreeItem; |
| |
| public class TestLazyVirtualTree extends TestTree { |
| |
| public Viewer createViewer(Composite parent) { |
| Tree tree = new Tree(parent, SWT.VIRTUAL); |
| tree.addListener(SWT.SetData, new Listener() { |
| private String getPosition(TreeItem item) { |
| TreeItem parentItem = item.getParentItem(); |
| if (parentItem == null) { |
| return "" + item.getParent().indexOf(item); |
| } |
| return getPosition(parentItem) + "." + parentItem.indexOf(item); |
| } |
| |
| public void handleEvent(Event event) { |
| String position = getPosition((TreeItem) event.item); |
| System.out.println("updating " + position); |
| } |
| }); |
| TreeViewer viewer = new TreeViewer(tree); |
| viewer.setContentProvider(new TestModelLazyTreeContentProvider(viewer)); |
| viewer.setUseHashlookup(true); |
| |
| if (fViewer == null) |
| fViewer = viewer; |
| return viewer; |
| } |
| |
| public void setInput(TestElement input) { |
| if(fViewer!=null) { |
| Object oldInput = fViewer.getInput(); |
| if(oldInput!=null) { |
| fViewer.setChildCount(oldInput, 0); |
| } |
| } |
| super.setInput(input); |
| if(fViewer!=null && input!=null) { |
| fViewer.setChildCount(input, input.getChildCount()); |
| } |
| } |
| |
| /** |
| * @param args |
| */ |
| public static void main(String[] args) { |
| TestBrowser browser = new TestLazyVirtualTree(); |
| if (args.length > 0 && args[0].equals("-twopanes")) |
| browser.show2Panes(); |
| browser.setBlockOnOpen(true); |
| browser.open(TestElement.createModel(3, 10)); |
| } |
| |
| } |