| /******************************************************************************* |
| * Copyright (c) 2019 Thomas Singer and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Thomas Singer - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.tests.gtk.snippets; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.TreeItem; |
| |
| public class Bug552096_TreeShowItemUnreliable { |
| |
| public static void main(String[] args) { |
| final Display display = new Display(); |
| final Shell shell = new Shell(display); |
| shell.setLayout(new GridLayout()); |
| |
| final Button button = new Button(shell, SWT.PUSH); |
| button.setText("Add"); |
| button.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false, false)); |
| |
| final Tree tree = new Tree(shell, SWT.BORDER); |
| tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); |
| |
| button.addListener(SWT.Selection, event -> { |
| final TreeItem rootNode = new TreeItem(tree, SWT.NONE, 0); |
| // Code below appends to the bottom of the Tree |
| // final TreeItem rootNode = new TreeItem(tree, SWT.NONE, tree.getItemCount()); |
| rootNode.setText("Root " + tree.getItemCount()); |
| |
| final TreeItem childItem = new TreeItem(rootNode, SWT.NONE); |
| childItem.setText("Child"); |
| rootNode.setExpanded(true); |
| |
| tree.showItem(rootNode); |
| }); |
| |
| shell.setSize(400, 300); |
| shell.open(); |
| |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| |
| display.dispose(); |
| } |
| } |