jDialog 不处理

Question

我有一个 jFrame，当我按 F2 键时调用 jDialog，在这个 jDialog 中放置一些信息，然后当按下或单击 jButton 或 Enter 时，我获取信息并处理 jDialog。

但是，jDialog 并没有关闭，而是获取了我请求的所有信息。

代码如下：

    /**
     * Creates new form DialogCPF
     */
    public DialogCPF(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
        jFormattedTextField1.addKeyListener(new Tecla() {
            @Override
            public void keyReleased(KeyEvent e) {
               
            }
        });
    }
 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        
        ConsumirWS2 WS = new ConsumirWS2();
        try {
            WS.Buscar();
        } catch (Exception ex) {
            Logger.getLogger(DialogCPF.class.getName()).log(Level.SEVERE, null, ex);
        }
                jButtonSalvar.setEnabled(true);
                jButtonExcluir.setEnabled(false);
                jButtonINSERIR.setEnabled(false);
                jButtonALTERAR.setEnabled(false);
                jButtonPROCURAR.setEnabled(false);
                jTextFieldAPELIDO.setEnabled(true);
                jTextFieldNOME.setEnabled(true);
                jFormattedTextFieldCPF.setEnabled(true);
                jFormattedTextFieldDATA.setEnabled(true);
                jTextFieldID.setEnabled(false);
                /*DialogCPF dialog = new DialogCPF(new javax.swing.JFrame(), false);
                dialog.dispose();*/

                DialogCPF A = (DialogCPF)evt.getSource();
                A.dispose();
                
    }                                        

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(DialogCPF.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(DialogCPF.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(DialogCPF.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(DialogCPF.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the dialog */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                DialogCPF dialog = new DialogCPF(new javax.swing.JFrame(), true);
                dialog.addWindowListener(new java.awt.event.WindowAdapter() {
                    @Override
                    public void windowClosing(java.awt.event.WindowEvent e) {
                        System.exit(0);
                    }
                });
                
                dialog.addKeyListener(new KeyListener(){  

        @Override
        public void keyTyped(KeyEvent e) {
            // Nothing
        }

        @Override
        public void keyPressed(KeyEvent e) {
            // Nothing 
        }

        @Override
        public void keyReleased(KeyEvent e) {
            if(e.getKeyCode() == KeyEvent.VK_ENTER){
        ConsumirWS2 WS = new ConsumirWS2();
        try {
            WS.Buscar();
        } catch (Exception ex) {
            Logger.getLogger(DialogCPF.class.getName()).log(Level.SEVERE, null, ex);
        }
                jButtonSalvar.setEnabled(true);
                jButtonExcluir.setEnabled(false);
                jButtonINSERIR.setEnabled(false);
                jButtonALTERAR.setEnabled(false);
                jButtonPROCURAR.setEnabled(false);
                jTextFieldAPELIDO.setEnabled(true);
                jTextFieldNOME.setEnabled(true);
                jFormattedTextFieldCPF.setEnabled(true);
                jFormattedTextFieldDATA.setEnabled(true);
                jTextFieldID.setEnabled(false);
                DialogCPF dialog = new DialogCPF(new javax.swing.JFrame(), true);
                //dialog.setEnabled(false);
                dialog.dispose();
                }
            }
        });        
                dialog.setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    public static javax.swing.JFormattedTextField jFormattedTextField1;
    private javax.swing.JLabel jLabel1;
    public javax.swing.JLabel jLabel2;
    private javax.swing.JPanel jPanel1;
    // End of variables declaration                   
}

我已经尝试了 This, this and this 解决方案，但是，我无法提供解决方案

Answer 1

这个...

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
    // TODO add your handling code here:

    ConsumirWS2 WS = new ConsumirWS2();
    try {
        WS.Buscar();
    } catch (Exception ex) {
        Logger.getLogger(DialogCPF.class.getName()).log(Level.SEVERE, null, ex);
    }
    //...
    DialogCPF A = (DialogCPF) evt.getSource();
    A.dispose();

}

不太可能工作，因为 ActionEvent 的来源不太可能是对话。我还担心 ConsumirWS2 的实例的创建，这不是对话框的责任，对话框应该允许调用者提取它需要的信息，可能通过观察者模式。

这个...

dialog.addKeyListener(new KeyListener() {

    @Override
    public void keyTyped(KeyEvent e) {
        // Nothing
    }

    @Override
    public void keyPressed(KeyEvent e) {
        // Nothing 
    }

    @Override
    public void keyReleased(KeyEvent e) {
        if (e.getKeyCode() == KeyEvent.VK_ENTER) {
            //...
        }
    }
});

是个坏主意，出于多种原因，除了对用户来说不明显之外，任何将焦点从对话框（如文本字段）上移开的组件都会阻止它的执行。相反，请参阅 How to set the Java default button to react on ENTER key _released_? 以获得更好的解决方案

但是当我们在这里时...

@Override
public void keyReleased(KeyEvent e) {
    if (e.getKeyCode() == KeyEvent.VK_ENTER) {
        //...
        DialogCPF dialog = new DialogCPF(new javax.swing.JFrame(), true);
        //dialog.setEnabled(false);
        dialog.dispose();
    }
}

行不通。您创建了一个新的对话框实例并立即将其处理掉……这将如何影响屏幕上的对话框实例并触发此事件？！

一般来说，您需要在对话框的当前实例上调用 dispose 并且您最好查看 How to Make Dialogs and How to Make Frames 并且您最好避免使用表单编辑

作为概念示例...

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;

public class Main {

    public static void main(String[] args) {
        new Main();
    }

    public Main() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new GridBagLayout());
            setBorder(new EmptyBorder(50, 50, 50, 50));

            JButton btn = new JButton("Collect data");
            btn.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    FormData formData = DataEntryPane.showDialog(TestPane.this, null);
                    if (formData != null) {
                        JOptionPane.showMessageDialog(TestPane.this, "I have new data");
                    } else {
                        JOptionPane.showMessageDialog(TestPane.this, "No new data for me");
                    }
                }
            });
            add(btn);
        }

    }

    public static class FormData {

        private String importantStuff;

        public FormData(String importantStuff) {
            this.importantStuff = importantStuff;
        }

        public String getImportantStuff() {
            return importantStuff;
        }

    }

    public static class DataEntryPane extends JPanel {

        public interface Observer {

            public void formValidationRequired(DataEntryPane source);
        }

        private Observer observer;
        private JTextField textField;

        public DataEntryPane(Observer observer, FormData formData) {
            this.observer = observer;
            setLayout(new GridBagLayout());
            textField = new JTextField(10);

            add(new JLabel("Some important stuff: "));
            add(textField);

            if (formData != null) {
                textField.setText(formData.getImportantStuff());
            }

            ActionListener actionListener = new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    if (observer != null) {
                        observer.formValidationRequired(DataEntryPane.this);
                    }
                }
            };

            textField.addActionListener(actionListener);
        }

        public String getImportantStuff() {
            return textField.getText();
        }

        public static FormData showDialog(Component parent, FormData data) {
            enum State {
                OK, CANCEL
            }

            // You could use a JOptionPane instead, but where's the fun in that
            JDialog dialog = new JDialog(SwingUtilities.windowForComponent(parent));
            dialog.setTitle("All you data is belong to us");
            dialog.setModal(true);

            JPanel content = new JPanel(new BorderLayout());
            content.setBorder(new EmptyBorder(32, 32, 32, 32));
            dialog.setContentPane(content);

            DataEntryPane entryPane = new DataEntryPane(new Observer() {
                @Override
                public void formValidationRequired(DataEntryPane source) {
                    // Do what ever validation you need
                    boolean isValid = true;
                    if (isValid) {
                        source.putClientProperty("state", State.CANCEL);
                        dialog.dispose();
                    }
                }
            }, data);
            entryPane.setBorder(new EmptyBorder(32, 32, 32, 32));
            dialog.add(entryPane);

            JButton okayButton = new JButton("OK");
            JButton cancelButton = new JButton("Cancel");

            okayButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    entryPane.putClientProperty("state", State.OK);
                    dialog.dispose();
                }
            });

            cancelButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    entryPane.putClientProperty("state", State.CANCEL);
                    dialog.dispose();
                }
            });

            JPanel actionPane = new JPanel();
            actionPane.setBorder(new EmptyBorder(8, 8, 8, 8));
            actionPane.add(okayButton);
            actionPane.add(cancelButton);

            dialog.add(actionPane, BorderLayout.SOUTH);
            dialog.getRootPane().setDefaultButton(okayButton);

            dialog.pack();
            dialog.setLocationRelativeTo(parent);
            dialog.setVisible(true);

            State state = (State) entryPane.getClientProperty("state");
            // Only process the information if the user selected "okay"
            if (state != null && State.OK == state) {
                System.out.println("Validate user input");
                // Do what ever validation you need
                boolean isValid = true;
                if (isValid) {
                    String importantStuff = entryPane.getImportantStuff();
                    return new FormData(importantStuff);
                }
            } else {
                System.out.println("User cancelled operation");
            }

            return null;
        }
    }
}

jDialog 不处理

jDialog do not dispose

java

swing

作为概念示例...