| /******************************************************************************* |
| * Copyright (c) 2000, 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * Accessibility example snippet: tell a screen reader about updates |
| * to a non-focused descriptive area |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.6 |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.accessibility.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet340 { |
| |
| public static void main(String[] args) { |
| Display display = new Display(); |
| Shell shell = new Shell(display); |
| shell.setText("Snippet 340"); |
| shell.setLayout(new GridLayout()); |
| shell.setText("Description Relation Example"); |
| |
| // (works with either a Label or a READ_ONLY Text) |
| final Label liveLabel = new Label(shell, SWT.BORDER | SWT.READ_ONLY); |
| // final Text liveLabel = new Text(shell, SWT.BORDER | SWT.READ_ONLY); |
| liveLabel.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); |
| liveLabel.setText("Live region messages go here"); |
| |
| new Label(shell, SWT.NONE).setText("Type an integer from 1 to 4:"); |
| |
| final Text textField = new Text(shell, SWT.SINGLE | SWT.BORDER); |
| textField.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); |
| textField.addModifyListener(e -> { |
| String textValue = textField.getText(); |
| String message = textValue + " is not valid input."; |
| try { |
| int value = Integer.parseInt(textValue); |
| switch (value) { |
| case 1: message = "One for the money,"; break; |
| case 2: message = "Two for the show,"; break; |
| case 3: message = "Three to get ready,"; break; |
| case 4: message = "And four to go!"; break; |
| } |
| } catch (NumberFormatException ex) {} |
| liveLabel.setText(message); |
| textField.getAccessible().sendEvent(ACC.EVENT_DESCRIPTION_CHANGED, null); |
| textField.setSelection(0, textField.getCharCount()); |
| }); |
| textField.getAccessible().addRelation(ACC.RELATION_DESCRIBED_BY, liveLabel.getAccessible()); |
| liveLabel.getAccessible().addRelation(ACC.RELATION_DESCRIPTION_FOR, textField.getAccessible()); |
| textField.getAccessible().addAccessibleListener(new AccessibleAdapter() { |
| @Override |
| public void getDescription(AccessibleEvent event) { |
| event.result = liveLabel.getText(); |
| } |
| }); |
| |
| shell.pack(); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) display.sleep(); |
| } |
| display.dispose(); |
| } |
| } |