import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Decorations;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.Shell;

public class AcceleratorsTest {

    static class ActionTest extends Action {
        ActionTest() {
            super("Sample Action");
            setAccelerator('A');
        }

        @Override
        public void run() {
            MessageDialog.openInformation(null, "hello", "hello");
        }
    }

    public static void main(String[] args) {
        Display display = Display.getDefault();
        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());

        // menu with one action having the accelerator key 'A'
        MenuManager menuManager = new MenuManager();
        Menu menu = menuManager.createMenuBar((Decorations)shell);
        shell.setMenuBar(menu);
        MenuManager menuFile = new MenuManager("File");
        menuFile.add(new ActionTest());
        menuManager.add(menuFile);
        menuManager.updateAll(true);

        // text widget fills up the main shell
        StyledText text = new StyledText(shell, SWT.BORDER | SWT.READ_ONLY);
        text.setText("Accelerators problem inside StyledText:\r\n"
                + " - okay on Windows: pressing A when the text view is focused displays the pop-up (and the letter A is not output)<br>\r\n"
                + " - fail on macOS: pressing A when the text view is focused does NOT display the pop-up (and the letter A is output)");

        // event loop
        shell.open();
        while(!shell.isDisposed()) {
            if(!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}