public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("Text Editor");
Menu bar = new Menu(shell, SWT.BAR);
shell.setMenuBar(bar);
MenuItem fileItem = new MenuItem(bar, SWT.CASCADE);
fileItem.setText("&File");
Menu fileMenu = new Menu(shell, SWT.DROP_DOWN);
fileItem.setMenu(fileMenu);
MenuItem saveItem = new MenuItem(fileMenu, SWT.PUSH);
saveItem.setText("&Save\tCtrl+S");
saveItem.setAccelerator(SWT.MOD1 + 'S');
saveItem.addListener(SWT.Selection, e -> shell.setModified(false));
MenuItem exitItem = new MenuItem(fileMenu, SWT.PUSH);
exitItem.setText("Exit");
exitItem.addListener(SWT.Selection, e -> shell.close());
Text text = new Text(shell, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
text.addListener(SWT.Modify, e -> shell.setModified(true));
shell.addListener(
SWT.Close,
e -> {
if (shell.getModified()) {
MessageBox box = new MessageBox(shell, SWT.PRIMARY_MODAL | SWT.OK | SWT.CANCEL);
box.setText(shell.getText());
box.setMessage("You have unsaved changes, do you want to exit?");
e.doit = box.open() == SWT.OK;
}
});
shell.setLayout(new FillLayout());
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
