Re: [platform-dev] SWT Accessibility Documentation

[Thomas Singer <ts-swt@xxxxxxxxxxx>]

Hi experts,

Please consider the attached example code.

When running on Windows with Narrator active (verbosity level set to 4 - 
Some text details), the only text to hear is "tab contains 5 items". I 
have no clue how to let it tell the current selection (initially or 
after changing). Could someone please help me further? Thanks in advance.

--
Thomas

import org.eclipse.swt.*;
import org.eclipse.swt.accessibility.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

/**
 * @author Thomas Singer
 */
public class AccessibilityTest {

	public static void main(String[] args) {
		final Display display = new Display();

		final Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());

		new MyControl(shell);

		shell.setSize(400, 300);
		shell.open();

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}

		display.dispose();
	}

	private static class MyControl extends Composite {
		private static final int COUNT = 5;

		private int value;

		public MyControl(Composite parent) {
			super(parent, 0);
			addListener(SWT.Paint, event -> {
				final Point size = getSize();
				event.gc.drawString(String.valueOf(value), size.x / 2, size.y / 2);
			});
			addListener(SWT.Traverse, event -> {
				if (event.detail == SWT.TRAVERSE_ARROW_PREVIOUS) {
					value = (value + COUNT - 1) % COUNT;
				}
				else if (event.detail == SWT.TRAVERSE_ARROW_NEXT) {
					value = (value + 1) % COUNT;
				}
				else {
					return;
				}

				getAccessible().selectionChanged();
				redraw();
			});

			getAccessible().addAccessibleControlListener(new AccessibleControlAdapter() {
				@Override
				public void getRole(AccessibleControlEvent e) {
					if (e.childID == ACC.CHILDID_SELF) {
						e.detail = ACC. ROLE_TABFOLDER;
					}
					else {
						e.detail = ACC. ROLE_TABITEM;
					}
				}

				@Override
				public void getChildCount(AccessibleControlEvent e) {
					e.detail = COUNT;
				}

				@Override
				public void getChildren(AccessibleControlEvent e) {
					final Integer[] children = new Integer[COUNT];
					for (int i = 0; i < children.length; i++) {
						children[i] = i;
					}
					e.children = children;
				}

				@Override
				public void getSelection(AccessibleControlEvent e) {
					getValue(e);
				}

				@Override
				public void getValue(AccessibleControlEvent e) {
					if (e.childID >= 0) {
						e.result = "value " + value;
					}
					else {
						e.result = "control";
					}
				}
			});
		}
	}
}