java - JTabbedPane のタブを変更しているときに、別の JInternalFrame 内で開かれている Opened JInternalFrame を閉じる

Question

Tabbedpane 1とTabbedpane 2というタイトルの 2 つのタブがあるアプリケーションを作成しました。1 つのタブ本体のTabbedpane 1JInternalFrameには、検索ボタンがある が含まれています。ボタンをクリックするとJInternalFrame、メイン内で別のものが開きますJInternalFrame。

Tabbedpane 2というタイトルの2番目のタブをクリックしながら、開いJInternalFrameた、つまり検索を閉じる方法を教えてください。JInternalFrame

プロパティの変更を試みましたが.setClosed(true)、.setVisible(true)それでもうまくいきません。

Answer 1

状態が変化したとき (つまり、タブが切り替わったとき)ChangeListenerに通知される を使用します。JTabbedPane

final JTabbedPane tabbedPane = new JTabbedPane();

tabbedPane.addChangeListener(new ChangeListener() {
    public void stateChanged(ChangeEvent e) {
       //tab has been changed
    }
});

問題は、以前のタブ、つまり変更前のタブを監視する方法が必要になることです。これは次の方法で実行できます。

tabbedPane.addChangeListener(new ChangeListener() {
    int prev_index = 0;
    int curr_index = 0;

    public void stateChanged(ChangeEvent e) {
        prev_index = curr_index;
        curr_index = tabbedPane.getSelectedIndex();

        System.out.println("Tab (Current): " + curr_index);
        System.out.println("Tab (Previous): " + prev_index);
    }
});

更新 1:

閉じるには、そのインスタンスJInternalFrameを呼び出すことをお勧めしますdispose()

更新 2:

Searchこれが固定コードです。基本的にクラスのゲッターが追加されているため、で作成された検索クラスの現在のインスタンスへのアクセスを可能JIFrame1にするgetSearch()メソッドがあり、既に作成されているインスタンスを確実に破棄するように呼び出します。JIFrame1changedState(..)jiFrame1.getSearch().dispose()

import java.awt.Container;
import java.awt.event.MouseListener;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Sample extends javax.swing.JFrame {

    JIFrame1 jiframe1 = new JIFrame1();

    public Sample() {
        initComponents();

        Container jiframe1cont = tab1;
        for (MouseListener listener : ((javax.swing.plaf.basic.BasicInternalFrameUI) jiframe1.getUI()).getNorthPane().getMouseListeners()) {
            ((javax.swing.plaf.basic.BasicInternalFrameUI) jiframe1.getUI()).getNorthPane().removeMouseListener(listener);
        }
        jiframe1.setLocation(10, 10);
        jiframe1cont.add(jiframe1);
        jiframe1.setVisible(true);

        JIFrame2 jiframe2 = new JIFrame2();
        Container jiframe2cont = tab2;
        for (MouseListener listener : ((javax.swing.plaf.basic.BasicInternalFrameUI) jiframe2.getUI()).getNorthPane().getMouseListeners()) {
            ((javax.swing.plaf.basic.BasicInternalFrameUI) jiframe2.getUI()).getNorthPane().removeMouseListener(listener);
        }
        jiframe2.setLocation(10, 10);
        jiframe2cont.add(jiframe2);
        jiframe2.setVisible(true);
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        tab1 = new javax.swing.JDesktopPane();
        tab2 = new javax.swing.JDesktopPane();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        tabbedPane.setTabPlacement(javax.swing.JTabbedPane.LEFT);
        tabbedPane.addChangeListener(new javax.swing.event.ChangeListener() {
            public void stateChanged(javax.swing.event.ChangeEvent evt) {
                tabbedPaneStateChanged(evt);
            }
        });

        tab1.setBackground(new java.awt.Color(240, 240, 240));
        tabbedPane.addTab("Tabbedpane 1", tab1);

        tab2.setBackground(javax.swing.UIManager.getDefaults().getColor("Button.background"));
        tabbedPane.addTab("Tabbedpane 2", tab2);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(tabbedPane, javax.swing.GroupLayout.DEFAULT_SIZE, 731, Short.MAX_VALUE));
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(tabbedPane, javax.swing.GroupLayout.DEFAULT_SIZE, 503, Short.MAX_VALUE));

        pack();
    }// </editor-fold>

    private void tabbedPaneStateChanged(javax.swing.event.ChangeEvent evt) {
        try {
            jiframe1.getSearch().dispose();
        } catch (Exception ex) {
            Logger.getLogger(Sample.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Sample().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JDesktopPane tab1;
    private javax.swing.JDesktopPane tab2;
    private final javax.swing.JTabbedPane tabbedPane = new javax.swing.JTabbedPane();
    // End of variables declaration
}

class Search extends javax.swing.JInternalFrame {

    public Search() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jTextField1 = new javax.swing.JTextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jButton1 = new javax.swing.JButton();

        jTextField1.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.LOWERED));

        jTable1.setModel(new javax.swing.table.DefaultTableModel(
                new Object[][]{
                    {null, null, null, null},
                    {null, null, null, null},
                    {null, null, null, null},
                    {null, null, null, null}
                },
                new String[]{
                    "Title 1", "Title 2", "Title 3", "Title 4"
                }));
        jScrollPane1.setViewportView(jTable1);

        jButton1.setText("CLOSE");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 385, Short.MAX_VALUE)
                .addContainerGap())
                .addGroup(layout.createSequentialGroup()
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 190, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(205, Short.MAX_VALUE))))
                .addGroup(layout.createSequentialGroup()
                .addGap(158, 158, 158)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(172, Short.MAX_VALUE)));
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                .addGap(22, 22, 22)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 141, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jButton1)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)));

        pack();
    }// </editor-fold>

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        this.dispose();
    }
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration
}

class JIFrame1 extends javax.swing.JInternalFrame {

    public JIFrame1() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        pane = new javax.swing.JDesktopPane();
        jButton1 = new javax.swing.JButton();

        pane.setBackground(new java.awt.Color(240, 240, 240));

        jButton1.setText("SEARCH");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        jButton1.setBounds(170, 60, 90, 23);
        pane.add(jButton1, javax.swing.JLayeredPane.DEFAULT_LAYER);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(pane, javax.swing.GroupLayout.DEFAULT_SIZE, 567, Short.MAX_VALUE));
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(pane, javax.swing.GroupLayout.DEFAULT_SIZE, 322, Short.MAX_VALUE));

        pack();
    }// </editor-fold>
    private Search search;

    public Search getSearch() {
        return search;
    }

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        search = new Search();
        Container searchcont = pane;
        for (MouseListener listener : ((javax.swing.plaf.basic.BasicInternalFrameUI) search.getUI()).getNorthPane().getMouseListeners()) {
            ((javax.swing.plaf.basic.BasicInternalFrameUI) search.getUI()).getNorthPane().removeMouseListener(listener);
        }
        search.setLocation(10, 10);
        searchcont.add(search);
        search.setVisible(true);
    }
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JDesktopPane pane;
    // End of variables declaration
}

class JIFrame2 extends javax.swing.JInternalFrame {

    public JIFrame2() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();

        jLabel1.setText("JIFrame2..............");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                .addGap(100, 100, 100)
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 157, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(137, Short.MAX_VALUE)));
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                .addGap(86, 86, 86)
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 47, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(145, Short.MAX_VALUE)));

        pack();
    }// </editor-fold>
    // Variables declaration - do not modify
    private javax.swing.JLabel jLabel1;
    // End of variables declaration
}

更新 3:

NPE の理由は次のとおりです。

private void tabbedPaneStateChanged(javax.swing.event.ChangeEvent evt) {
        try {
            jiframe1.getSearch().dispose();
        } catch (Exception ex) {
            Logger.getLogger(Sample.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

これに変更します：

private void tabbedPaneStateChanged(javax.swing.event.ChangeEvent evt) {
    try {
        Search s=jiframe1.getSearch();
        if(s!=null)
        s.dispose();
    } catch (Exception ex) {
        Logger.getLogger(Sample.class.getName()).log(Level.SEVERE, null, ex);
    }
}