java - 隐藏面板时丢失 JDialog 标题 (Java)

标签 java swing jdialog joptionpane

编辑: 当然，我会在发布问题 2 分钟后找到答案。 How to completely remove an icon from JDialog?

但是跟进；任何人都知道在更改可调整大小的属性时使图标状态保持一致的方法吗？

附言。 8 小时后我无法回答我自己的问题。

原始问题: 简而言之，这是一个有问题的精简示例代码。 当我单击“详细信息”(WinXP x32 java 1.6)时，jPanel2 更改了可见性状态，并且由于某种原因与 jPanel2 一起删除了对话框图标。很好奇。 任何人都知道为什么图标与 JPanel 一起隐藏？ 代码由 NetBeans 7.1 生成，仅略微调整为自包含。

在此先感谢您的帮助!

import java.awt.Frame;

import javax.swing.Icon;
import javax.swing.JOptionPane;
import javax.swing.UIManager;

public class TestHide extends javax.swing.JDialog {

  private static final long serialVersionUID = 1L;

  public TestHide(java.awt.Frame parent, boolean modal) {
    super(parent, modal);
    initComponents();
    jPanel2.setVisible(false);
    pack();
  }

  private void initComponents() {

    jPanel1 = new javax.swing.JPanel();
    lblIcon = new javax.swing.JLabel();
    jScrollPane1 = new javax.swing.JScrollPane();
    taShortMsg = new javax.swing.JTextArea();
    jPanel2 = new javax.swing.JPanel();
    jPanel3 = new javax.swing.JPanel();
    jLabel3 = new javax.swing.JLabel();
    jSeparator1 = new javax.swing.JSeparator();
    jSeparator2 = new javax.swing.JSeparator();
    jPanel4 = new javax.swing.JPanel();
    jSeparator3 = new javax.swing.JSeparator();
    jScrollPane2 = new javax.swing.JScrollPane();
    taDetails = new javax.swing.JTextArea();
    btnOk = new javax.swing.JButton();
    btnTgDetails = new javax.swing.JToggleButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);

    lblIcon.setText(""); // NOI18N

    jScrollPane1.setBorder(null);

    taShortMsg.setBackground(getBackground());
    taShortMsg.setColumns(20);
    taShortMsg.setEditable(false);
    taShortMsg.setFont(lblIcon.getFont());
    taShortMsg.setLineWrap(true);
    taShortMsg.setRows(5);
    taShortMsg.setBorder(null);
    taShortMsg.setCursor(getCursor());
    taShortMsg.setOpaque(false);
    jScrollPane1.setViewportView(taShortMsg);

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(
        jPanel1Layout.createSequentialGroup().addContainerGap().addComponent(lblIcon).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 399, Short.MAX_VALUE).addContainerGap()));
    jPanel1Layout.setVerticalGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(
        jPanel1Layout
            .createSequentialGroup()
            .addContainerGap()
            .addGroup(
                jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup().addComponent(lblIcon).addContainerGap(54, Short.MAX_VALUE))
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.TRAILING))));

    jPanel2.addComponentListener(new java.awt.event.ComponentAdapter() {
      public void componentHidden(java.awt.event.ComponentEvent evt) {
        jPanel2ComponentHidden(evt);
      }

      public void componentShown(java.awt.event.ComponentEvent evt) {
        jPanel2ComponentShown(evt);
      }
    });

    jLabel3.setText("jLabel3"); // NOI18N

    javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
    jPanel3.setLayout(jPanel3Layout);
    jPanel3Layout.setHorizontalGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(
        jPanel3Layout.createSequentialGroup().addContainerGap().addComponent(jSeparator1).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED).addComponent(jLabel3)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED).addComponent(jSeparator2).addContainerGap()));
    jPanel3Layout
        .setVerticalGroup(jPanel3Layout
            .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(
                javax.swing.GroupLayout.Alignment.TRAILING,
                jPanel3Layout
                    .createSequentialGroup()
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addGroup(
                        jPanel3Layout
                            .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jSeparator1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 10,
                                javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jSeparator2, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 10,
                                javax.swing.GroupLayout.PREFERRED_SIZE))).addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE));

    javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
    jPanel4.setLayout(jPanel4Layout);
    jPanel4Layout.setHorizontalGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(
        jPanel4Layout.createSequentialGroup().addContainerGap().addComponent(jSeparator3).addContainerGap()));
    jPanel4Layout.setVerticalGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(javax.swing.GroupLayout.Alignment.TRAILING,
        jPanel4Layout.createSequentialGroup().addContainerGap().addComponent(jSeparator3, javax.swing.GroupLayout.DEFAULT_SIZE, 0, Short.MAX_VALUE)));

    jScrollPane2.setBorder(null);

    taDetails.setColumns(20);
    taDetails.setEditable(false);
    taDetails.setFont(lblIcon.getFont());
    taDetails.setRows(5);
    jScrollPane2.setViewportView(taDetails);

    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addGroup(jPanel2Layout.createSequentialGroup().addContainerGap().addComponent(jScrollPane2).addContainerGap())
        .addComponent(jPanel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));
    jPanel2Layout.setVerticalGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(
        javax.swing.GroupLayout.Alignment.TRAILING,
        jPanel2Layout.createSequentialGroup()
            .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED).addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 129, Short.MAX_VALUE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jPanel4, javax.swing.GroupLayout.PREFERRED_SIZE, 8, javax.swing.GroupLayout.PREFERRED_SIZE)));

    btnOk.setText("OK"); // NOI18N
    btnOk.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        btnOkActionPerformed(evt);
      }
    });

    btnTgDetails.setText("Details"); // NOI18N
    btnTgDetails.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        btnTgDetailsActionPerformed(evt);
      }
    });

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(layout
        .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addGroup(
            layout.createSequentialGroup().addGap(0, 0, Short.MAX_VALUE).addComponent(btnOk, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(btnTgDetails, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE).addContainerGap())
        .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));
    layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(
        layout
            .createSequentialGroup()
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(btnTgDetails)
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup().addComponent(btnOk).addContainerGap()))));

    pack();
  }

  private void btnTgDetailsActionPerformed(java.awt.event.ActionEvent evt) {
    if (jPanel2.isVisible()) {
      btnTgDetails.setText("Details>>");
    } else {
      btnTgDetails.setText("Details<<");
    }
    jPanel2.setVisible(!jPanel2.isVisible());
    this.validate();
    this.pack();
  }

  private void btnOkActionPerformed(java.awt.event.ActionEvent evt) {
    dispose();
  }

  private void jPanel2ComponentHidden(java.awt.event.ComponentEvent evt) {
    setResizable(false);
  }

  private void jPanel2ComponentShown(java.awt.event.ComponentEvent evt) {
    setResizable(true);
  }

  public static void main(String args[]) {
    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(TestHide.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
      java.util.logging.Logger.getLogger(TestHide.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
      java.util.logging.Logger.getLogger(TestHide.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
      java.util.logging.Logger.getLogger(TestHide.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    showMessageDialog(null, "I am title", "Small message...", "long\n\nlong\nmessage", JOptionPane.INFORMATION_MESSAGE);
  }

  public static void showMessageDialog(Frame parent, String title, String shortMessage, String longMessage, int type) {
    TestHide md = new TestHide(parent, true);
    Icon icon = null;
    switch (type) {
    case JOptionPane.ERROR_MESSAGE:
      icon = UIManager.getIcon("OptionPane.errorIcon");
      break;
    case JOptionPane.INFORMATION_MESSAGE:
      icon = UIManager.getIcon("OptionPane.informationIcon");
      break;
    case JOptionPane.WARNING_MESSAGE:
      icon = UIManager.getIcon("OptionPane.warningIcon");
      break;
    }

    md.setTitle(title);
    md.lblIcon.setIcon(icon);
    md.taShortMsg.setText(shortMessage);
    if (longMessage == null) {
      md.btnTgDetails.setVisible(false);
    } else {
      md.taDetails.setText(longMessage);
      md.taDetails.setCaretPosition(0);
    }
    md.pack();
    md.setVisible(true);
  }

  private javax.swing.JButton btnOk;
  private javax.swing.JToggleButton btnTgDetails;
  private javax.swing.JLabel jLabel3;
  private javax.swing.JPanel jPanel1;
  private javax.swing.JPanel jPanel2;
  private javax.swing.JPanel jPanel3;
  private javax.swing.JPanel jPanel4;
  private javax.swing.JScrollPane jScrollPane1;
  private javax.swing.JScrollPane jScrollPane2;
  private javax.swing.JSeparator jSeparator1;
  private javax.swing.JSeparator jSeparator2;
  private javax.swing.JSeparator jSeparator3;
  private javax.swing.JLabel lblIcon;
  private javax.swing.JTextArea taDetails;
  private javax.swing.JTextArea taShortMsg;
}

最佳答案

如果你把下面的语句放在构造函数中，比如

public TestHide(java.awt.Frame parent, boolean modal) {
super(parent, modal);
setIconImage(Toolkit.getDefaultToolkit().getImage("images\\white_title.png"));
initComponents();
jPanel2.setVisible(false);
pack();  }

然后标题栏上的图标不断出现。

关于java - 隐藏面板时丢失 JDialog 标题 (Java)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9411426/

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