| /******************************************************************************* |
| * Copyright (c) 2016 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 |
| * Lars Vogel <Lars.Vogel@vogella.com> - Bug 502845 |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * Adding an accessible listener to provide emulated state information |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| */ |
| |
| import static org.eclipse.swt.events.SelectionListener.*; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.accessibility.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet162 { |
| |
| final static String[] ITEM_NAMES = {"first item", "second", "third", "fourth", "fifth"}; |
| |
| public static void main (String [] args) { |
| Display display = new Display (); |
| final Image checkedImage = getStateImage (display, true); |
| final Image uncheckedImage = getStateImage (display, false); |
| |
| Shell shell = new Shell (display); |
| shell.setText("Snippet 162"); |
| shell.setLayout (new FillLayout ()); |
| |
| final Table table = new Table (shell, SWT.FULL_SELECTION | SWT.BORDER); |
| for (int i = 0; i < ITEM_NAMES.length; i++) { |
| TableItem item = new TableItem (table, SWT.NONE); |
| item.setText (ITEM_NAMES[i]); |
| item.setImage (i % 2 == 0 ? checkedImage : uncheckedImage); |
| } |
| table.addSelectionListener(widgetDefaultSelectedAdapter(e -> { |
| TableItem item = (TableItem)e.item; |
| item.setImage(item.getImage() == checkedImage ? uncheckedImage : checkedImage); |
| })); |
| |
| table.getAccessible ().addAccessibleControlListener (new AccessibleControlAdapter () { |
| @Override |
| public void getRole(AccessibleControlEvent e) { |
| e.detail = ACC.ROLE_CHECKBUTTON; |
| } |
| @Override |
| public void getState (AccessibleControlEvent e) { |
| if (e.childID >= 0 && e.childID < table.getItemCount ()) { |
| TableItem item = table.getItem (e.childID); |
| if (item.getImage() == checkedImage) { |
| e.detail |= ACC.STATE_CHECKED; |
| } |
| } |
| } |
| }); |
| |
| shell.pack(); |
| shell.open (); |
| while (!shell.isDisposed ()) { |
| if (!display.readAndDispatch ()) display.sleep (); |
| } |
| checkedImage.dispose (); |
| uncheckedImage.dispose (); |
| display.dispose (); |
| } |
| |
| static Image getStateImage (Display display, boolean checked) { |
| Image image = new Image (display, 16, 16); |
| GC gc = new GC (image); |
| gc.setBackground (display.getSystemColor (SWT.COLOR_YELLOW)); |
| gc.fillOval (0, 0, 16, 16); |
| if (checked) { |
| gc.setForeground (display.getSystemColor (SWT.COLOR_DARK_GREEN)); |
| gc.drawLine (0, 0, 16, 16); |
| gc.drawLine (16, 0, 0, 16); |
| } |
| gc.dispose (); |
| return image; |
| } |
| } |