数据绑定 Swing Eclipse beansbinding-1.2.1.jar WindowBuilderPro

Question

我正在尝试使用 WindowBuilder 在 Eclipse IDE 下使用 Databinding 创建一个新的 GUI。 首先，我将 beansbinding-1.2.1.jar 添加到项目中并获得 WindowBuilder 的 Bindings 选项卡。

我创建了一个 Bean (JavaBean)、一个主类 (Run) 和两个不同的 JFrame（LabelWindow 和 TextFieldWindow）。全部在邮报下面。 在 LabelWindow 中，我使用了 JLabel 来显示 Bean 中的数据（名称：“Foo”）。那是完美的工作。如果我更改 bean 中的数据，则该 JLabel 中的数据也会更改，如果我更改该 JLabel 中的数据，则 Bean 也会更改。

在 TextFieldWindow 中，我使用了 JTextField 来显示 Bean 中的数据。这不像 JLabel 那样工作。 Gui 显示来自 Bean“Foo”的数据，如果我更改 Beans 值，它也会出现在 JTextField 中。那是有效的。 但是如果我改变 JTextField 的值，Beans 的值不会改变。

整个 JFrame 由 WindowBuilder 插件中的“Swing 自动数据绑定向导”生成，使用 JLabel 可以工作，使用 JTextField 只能在一个方向上工作。

谁能告诉我出了什么问题以及如何解决这个问题（我更喜欢使用 WindowBuilder / Bindingtab 的方式，我只是不想手动更改太多）。

这是我的代码：

JavaBean.java

package def;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

public class JavaBean {
    private String name = "Foo";
    private PropertyChangeSupport pcs = new PropertyChangeSupport(this);

    public String getName() {
        return name;
    }

    public void setName(String name) {
        String oldValue = this.name;
        this.name = name;
        pcs.firePropertyChange("name", oldValue, name);
    }

    public void addPropertyChangeListener(PropertyChangeListener pcl) {
        pcs.addPropertyChangeListener(pcl);
    }

    public void removePropertyChangeListener(PropertyChangeListener pcl) {
        pcs.removePropertyChangeListener(pcl);
    }
}

Run.java

package def;

import java.awt.EventQueue;

public class Run {

    public static void main(String[] args) {
        //Switch these two Versions to Test either the Label Version or the TextField Version
        //EventQueue.invokeLater( () -> new LabelWindow().setVisible(true));
        EventQueue.invokeLater( () -> new TextFieldWindow().setVisible(true));
    }

}

LabelWindow.java

package def;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

import org.jdesktop.beansbinding.AutoBinding;
import org.jdesktop.beansbinding.BeanProperty;
import org.jdesktop.beansbinding.BindingGroup;
import org.jdesktop.beansbinding.Bindings;

public class LabelWindow extends JFrame {

    private static final long serialVersionUID = 1L;
    private BindingGroup m_bindingGroup;
    private JPanel m_contentPane;
    private JavaBean javaBean = new JavaBean();
    private JLabel nameJLabel;

    public LabelWindow() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        m_contentPane = new JPanel();
        setContentPane(m_contentPane);
        //
        GridBagLayout gridBagLayout = new GridBagLayout();
        gridBagLayout.columnWidths = new int[] { 0, 0, 0 };
        gridBagLayout.rowHeights = new int[] { 0, 0 };
        gridBagLayout.columnWeights = new double[] { 0.0, 1.0, 1.0E-4 };
        gridBagLayout.rowWeights = new double[] { 0.0, 1.0E-4 };
        m_contentPane.setLayout(gridBagLayout);

        JLabel nameLabel = new JLabel("Name:");
        GridBagConstraints labelGbc_0 = new GridBagConstraints();
        labelGbc_0.insets = new Insets(5, 5, 5, 5);
        labelGbc_0.gridx = 0;
        labelGbc_0.gridy = 0;
        m_contentPane.add(nameLabel, labelGbc_0);

        nameJLabel = new JLabel();
        GridBagConstraints componentGbc_0 = new GridBagConstraints();
        componentGbc_0.insets = new Insets(5, 0, 5, 5);
        componentGbc_0.fill = GridBagConstraints.HORIZONTAL;
        componentGbc_0.gridx = 1;
        componentGbc_0.gridy = 0;
        m_contentPane.add(nameJLabel, componentGbc_0);

        if (javaBean != null) {
            m_bindingGroup = initDataBindings();
        }
    }

    protected BindingGroup initDataBindings() {
        BeanProperty<JavaBean, String> nameProperty = BeanProperty.create("name");
        BeanProperty<JLabel, String> textProperty = BeanProperty.create("text");
        AutoBinding<JavaBean, String, JLabel, String> autoBinding = Bindings
                .createAutoBinding(AutoBinding.UpdateStrategy.READ_WRITE, javaBean, nameProperty, nameJLabel,
                        textProperty);
        autoBinding.bind();
        //
        BindingGroup bindingGroup = new BindingGroup();
        bindingGroup.addBinding(autoBinding);
        //
        return bindingGroup;
    }
}

TextFieldWindow.java

package def;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

import org.jdesktop.beansbinding.AutoBinding;
import org.jdesktop.beansbinding.BeanProperty;
import org.jdesktop.beansbinding.BindingGroup;
import org.jdesktop.beansbinding.Bindings;

public class TextFieldWindow extends JFrame {

    private static final long serialVersionUID = 1L;
    private BindingGroup m_bindingGroup;
    private JPanel m_contentPane;
    private JavaBean javaBean = new JavaBean();
    private JTextField nameJTextField;

    public TextFieldWindow() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        m_contentPane = new JPanel();
        setContentPane(m_contentPane);
        //
        GridBagLayout gridBagLayout = new GridBagLayout();
        gridBagLayout.columnWidths = new int[] { 0, 0, 0 };
        gridBagLayout.rowHeights = new int[] { 0, 0 };
        gridBagLayout.columnWeights = new double[] { 0.0, 1.0, 1.0E-4 };
        gridBagLayout.rowWeights = new double[] { 0.0, 1.0E-4 };
        m_contentPane.setLayout(gridBagLayout);

        JLabel nameLabel = new JLabel("Name:");
        GridBagConstraints labelGbc_0 = new GridBagConstraints();
        labelGbc_0.insets = new Insets(5, 5, 0, 5);
        labelGbc_0.gridx = 0;
        labelGbc_0.gridy = 0;
        m_contentPane.add(nameLabel, labelGbc_0);

        nameJTextField = new JTextField();
        GridBagConstraints componentGbc_0 = new GridBagConstraints();
        componentGbc_0.insets = new Insets(5, 0, 0, 0);
        componentGbc_0.fill = GridBagConstraints.HORIZONTAL;
        componentGbc_0.gridx = 1;
        componentGbc_0.gridy = 0;
        m_contentPane.add(nameJTextField, componentGbc_0);

        if (javaBean != null) {
            m_bindingGroup = initDataBindings();
        }
    }

    protected BindingGroup initDataBindings() {
        BeanProperty<JavaBean, String> nameProperty = BeanProperty.create("name");
        BeanProperty<JTextField, String> textProperty = BeanProperty.create("text");
        AutoBinding<JavaBean, String, JTextField, String> autoBinding = Bindings
                .createAutoBinding(AutoBinding.UpdateStrategy.READ_WRITE, javaBean, nameProperty, nameJTextField,
                        textProperty);
        autoBinding.bind();
        //
        BindingGroup bindingGroup = new BindingGroup();
        bindingGroup.addBinding(autoBinding);
        //
        return bindingGroup;
    }

    public JavaBean getJavaBean() {
        return javaBean;
    }

    public void setJavaBean(JavaBean newJavaBean) {
        setJavaBean(newJavaBean, true);
    }

    public void setJavaBean(JavaBean newJavaBean, boolean update) {
        javaBean = newJavaBean;
        if (update) {
            if (m_bindingGroup != null) {
                m_bindingGroup.unbind();
                m_bindingGroup = null;
            }
            if (javaBean != null) {
                m_bindingGroup = initDataBindings();
            }
        }
    }
}

Answer 1

在您的班级Run 中，您正在创建两个*容器。我没有运行您发布的代码，但我从未尝试在一个应用程序中创建两个*容器。我建议创建一个包含JLabel 和JTextField 的JFrame。你不这样做有什么原因吗？