| /******************************************************************************* |
| * Copyright (c) 2009, 2016 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * Button example snippet: create a tri-state button (toggle three states) |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.5 |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet315 { |
| public static void main(String[] args) { |
| Display display = new Display (); |
| Shell shell = new Shell (display); |
| shell.setLayout(new GridLayout()); |
| final Button button = new Button (shell, SWT.CHECK); |
| button.setLayoutData(new GridData(GridData.GRAB_VERTICAL | GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_CENTER)); |
| button.setText ("Tri-state"); |
| /* Make the button toggle between three states */ |
| button.addListener (SWT.Selection, e -> { |
| if (button.getSelection()) { |
| if (!button.getGrayed()) { |
| button.setGrayed(true); |
| } |
| } else { |
| if (button.getGrayed()) { |
| button.setGrayed(false); |
| button.setSelection (true); |
| } |
| } |
| }); |
| /* Read the tri-state button (application code) */ |
| button.addListener (SWT.Selection, e -> { |
| if (button.getGrayed()) { |
| System.out.println("Grayed"); |
| } else { |
| if (button.getSelection()) { |
| System.out.println("Selected"); |
| } else { |
| System.out.println("Not selected"); |
| } |
| } |
| }); |
| shell.setSize(300, 300); |
| shell.open (); |
| while (!shell.isDisposed ()) { |
| if (!display.readAndDispatch ()) display.sleep (); |
| } |
| display.dispose (); |
| } |
| } |