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我将 Eclipse 数据绑定与 bean 和 SWT java 应用程序一起使用。我成功地将几个文本字段和复选框与我的模型绑定在一起。现在我有三个单选按钮：

图形用户界面：

...
Model model = new Model();
...
Button btnAllUsers = new Button(grpExport, SWT.RADIO);
Button btnBatchUsersOnly = new Button(grpExport, SWT.RADIO);
Button btnCurrentBatchOnly = new Button(grpExport, SWT.RADIO);
...

// here comes the big question mark... :(
IObservableValue swtObsBtnAllUsers  = SWTObservables.observeSelection(btnAllUsers);
IObservableValue beanObsUserFilter = BeansObservables.observeValue(model, "userFilter");
bindingContext.bindValue(swtObsBtnAllUsers, beanObsUserFilter);
...

模型：

public class Model {
    public enum UserFilter {
        ALL_USERS, BATCH_USERS_ONLY, CURRENT_BATCH_ONLY
    }

    private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this);
    private UserFilter userFilter;

    public void addPropertyChangeListener(...) {...}

    public void removePropertyChangeListener(...) {...}
}

现在我想将三个单选按钮绑定到属性userFilter。转换逻辑应该是这样的：

GUI到模型的转换：

if (btnAllUsers != null && btnBatchUsersOnly != null && btnCurrentBatchOnly != null) {
if (btnAllUsers.getSelection()) {
        model.userFilter = UserFilter.ALL_USERS;
    } else if (btnBatchUsersOnly.getSelection()) {
        model.userFilter = UserFilter.BATCH_USERS_ONLY;
 } else {
        model.userFilter = UserFilter.CURRENT_BATCH_ONLY;
    }
}

模型到 GUI 的转换：

if (btnAllUsers != null && btnBatchUsersOnly != null && btnCurrentBatchOnly != null) {
    btnAllUsers.setSelection(model.getUserFilter() == UserFilter.ALL_USERS);
    btnBatchUsersOnly.setSelection(model.getUserFilter() == UserFilter.BATCH_USERS_ONLY);
    btnCurrentBatchOnly.setSelection(model.getUserFilter() == UserFilter.CURRENT_BATCH_ONLY);
}

我阅读了有关特定 UpdateValueStrategies 和转换的信息，但并没有真正开始。有人可以帮我举一个简短的例子吗？提前致谢！

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