Java tutorial
import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class GetPreferredSize { public static void main(String[] args) { final Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new GridLayout()); Button button = new Button(shell, SWT.PUSH | SWT.LEFT); button.setText("Button"); System.out.println("toControl: " + button.toControl(100, 200)); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } } }