Preserving keyboard layout in a JTextfield?

问题:

Simple example: 2 JTextFields, one for a spanish word another one for it's translation. Is there a way to preserve keyboard layout per JTextField so that the user wouldn't have to switch back and forth?

TIA.

回答1:

Yes, this demo code uses the keyboard layout for the selected locales in each text field:

public class InputMethodTest {

  public static void main(String[] args) {
    final InputContext en = InputContext.getInstance();
    en.selectInputMethod(Locale.UK);
    final InputContext es = InputContext.getInstance();
    es.selectInputMethod(new Locale("es", "ES"));
    JTextArea english = new JTextArea() {
      @Override
      public InputContext getInputContext() {
        return en;
      }
    };
    JTextArea spanish = new JTextArea() {
      @Override
      public InputContext getInputContext() {
        return es;
      }
    };

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().setLayout(new GridLayout());
    frame.getContentPane().add(new JScrollPane(english));
    frame.getContentPane().add(new JScrollPane(spanish));
    frame.setSize(600, 400);
    frame.setVisible(true);
  }
}

Tested on Windows XP Home with EN and ES keyboard layouts installed (via Control Panel > Regional and Language Options > Languages > Details...). See the Java Input Method Framework for more details.

回答2:

No, keyboard layouts are managed by the OS or desktop environment.

回答3:

If you know exactly the layout of the Spanish keyboard in question you could theoretically process KeyEvents yourself, translating them into the appropriate character. However this would not be an easy thing to do. You would probably end up inserting characters into the textfields yourself.