| /******************************************************************************* |
| * Copyright (c) 2009, 2013 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * FormLayout example snippet: use a form layout to hide/show a composite |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.5 |
| */ |
| import static org.eclipse.swt.events.SelectionListener.*; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet313 { |
| public static void main(String[] args) { |
| Display display = new Display(); |
| final Shell shell = new Shell(display); |
| shell.setLayout (new FormLayout()); |
| |
| final Button button = new Button(shell, SWT.PUSH); |
| button.setText(">>"); |
| FormData data = new FormData (); |
| data.top = new FormAttachment (0, 4); |
| data.right = new FormAttachment (100, -4); |
| button.setLayoutData (data); |
| |
| final Composite composite = new Composite(shell, SWT.BORDER); |
| final FormData down = new FormData (); |
| down.top = new FormAttachment (button, 4, SWT.BOTTOM); |
| down.bottom = new FormAttachment (100, -4); |
| down.left = new FormAttachment (0, 4); |
| down.right = new FormAttachment (100, -4); |
| final FormData up = new FormData (); |
| up.top = new FormAttachment (0); |
| up.bottom = new FormAttachment (0); |
| up.left = new FormAttachment (0); |
| up.right = new FormAttachment (0); |
| composite.setLayoutData (up); |
| |
| button.addSelectionListener(widgetSelectedAdapter(e -> { |
| if (composite.getLayoutData() == up) { |
| composite.setLayoutData (down); |
| button.setText("<<"); |
| } else { |
| composite.setLayoutData (up); |
| button.setText(">>"); |
| } |
| shell.pack (); |
| })); |
| |
| shell.pack (); |
| shell.open (); |
| |
| while (!shell.isDisposed ()) { |
| if (!display.readAndDispatch ()) |
| display.sleep (); |
| } |
| display.dispose (); |
| } |
| } |