1 Frame und mehrere Panels klappt nicht

[iSun84]

Hallo,

ich schreibe gerade eine kleine Anwendung mit einem Frame und mehreren Panels. Ein Panel ist als Menü-Panel da, indem sich 2 Buttons befinden um zwischen den anderen beiden Panels hin und her zu schalten.
Das Problem ist hierbei, dass immer nur das erste der beiden Panels angezeigt werden kann. Möchte ich mir das zweite angucken geht das nicht, bzw es wird komplett nicht angezeigt.

Hier mal ein Codeausschnitt aus der Klasse des Frames:

public class MaklerFrame1 extends JFrame {

    private JPanel panelCenter = new JPanel();
    private neuPanel nPanel = new neuPanel();
    private IdSuchPanel idPanel  = new IdSuchPanel();
    private MenuPanel mPanel = new MenuPanel(nPanel, idPanel);
    private JMenuBar menuBar = new JMenuBar();
    
    private JMenu menuFile = new JMenu();
    private JMenuItem menuFileExit = new JMenuItem();
    private JMenu menuHelp = new JMenu();
    private JMenuItem menuHelpAbout = new JMenuItem();
    private JLabel statusBar = new JLabel();
    private JToolBar toolBar = new JToolBar();
    private JButton buttonOpen = new JButton();
    private JButton buttonClose = new JButton();
    private JButton buttonHelp = new JButton();
    private ImageIcon imageOpen = new ImageIcon(MaklerFrame1.class.getResource("openfile.gif"));
    private ImageIcon imageClose = new ImageIcon(MaklerFrame1.class.getResource("closefile.gif"));
    private ImageIcon imageHelp = new ImageIcon(MaklerFrame1.class.getResource("help.gif"));

    private BorderLayout BorderLayout1 = new BorderLayout();


    public MaklerFrame1() {
        try {
            jbInit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
          
        this.setJMenuBar( menuBar );
        this.getContentPane().setLayout(BorderLayout1);
        panelCenter.setLayout( null );
     
        this.setSize(new Dimension(736, 443));
        this.setTitle( "Immobilienmakler" );
        menuFile.setText( "File" );
        menuFileExit.setText( "Exit" );
        menuFileExit.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent ae ) { fileExit_ActionPerformed( ae ); } } );
        menuHelp.setText( "Help" );
        menuHelpAbout.setText( "About" );
        menuHelpAbout.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent ae ) { helpAbout_ActionPerformed( ae ); } } );
        statusBar.setText( "" );
        buttonOpen.setToolTipText( "Open File" );
        buttonOpen.setIcon( imageOpen );
        buttonClose.setToolTipText( "Close File" );
        buttonClose.setIcon( imageClose );
        buttonHelp.setToolTipText( "About" );
        buttonHelp.setIcon( imageHelp );
       
        menuFile.add( menuFileExit );
        menuBar.add( menuFile );
        menuHelp.add( menuHelpAbout );
        menuBar.add( menuHelp );
        this.getContentPane().add( statusBar, BorderLayout.SOUTH );
        toolBar.add( buttonOpen );
        toolBar.add( buttonClose );
        toolBar.add( buttonHelp );
        this.getContentPane().add( toolBar, BorderLayout.NORTH );

        
      //this.getContentPane().add(panelCenter, BorderLayout.CENTER);
      this.getContentPane().add(mPanel, BorderLayout.WEST);   
      this.getContentPane().add(nPanel, BorderLayout.CENTER);
      this.getContentPane().add(idPanel, BorderLayout.CENTER);
      
        


    }

 

[knoppers]

panelWelchesAusgeblendetWerdenSoll.setVisible(false);
panelWelchesAngezeigtWerdenSoll.setVisible(true);

 

[Tomate_Salat]

CardLayout?

 

[iSun84]

Hey,

das Cardlayout klingt genau nachdem was ich vorhabe. Hier habe ich mal eine Frage. Setzte ich dieses Layout für den kompletten Frame ein oder nur für die zu wechselnden Panels?

 

[Tomate_Salat]

Nein nicht den kompletten Frame. Nur dort, wo sich die Panels wechseln. Schau dir einfach mal das Beispiel an: Quelle

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

package layout;

/*
 * CardLayoutDemo.java
 *
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class CardLayoutDemo implements ItemListener {
    JPanel cards; //a panel that uses CardLayout
    final static String BUTTONPANEL = "Card with JButtons";
    final static String TEXTPANEL = "Card with JTextField";
    
    public void addComponentToPane(Container pane) {
        //Put the JComboBox in a JPanel to get a nicer look.
        JPanel comboBoxPane = new JPanel(); //use FlowLayout
        String comboBoxItems[] = { BUTTONPANEL, TEXTPANEL };
        JComboBox cb = new JComboBox(comboBoxItems);
        cb.setEditable(false);
        cb.addItemListener(this);
        comboBoxPane.add(cb);
        
        //Create the "cards".
        JPanel card1 = new JPanel();
        card1.add(new JButton("Button 1"));
        card1.add(new JButton("Button 2"));
        card1.add(new JButton("Button 3"));
        
        JPanel card2 = new JPanel();
        card2.add(new JTextField("TextField", 20));
        
        //Create the panel that contains the "cards".
        cards = new JPanel(new CardLayout());
        cards.add(card1, BUTTONPANEL);
        cards.add(card2, TEXTPANEL);
        
        pane.add(comboBoxPane, BorderLayout.PAGE_START);
        pane.add(cards, BorderLayout.CENTER);
    }
    
    public void itemStateChanged(ItemEvent evt) {
        CardLayout cl = (CardLayout)(cards.getLayout());
        cl.show(cards, (String)evt.getItem());
    }
    
    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event dispatch thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("CardLayoutDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        //Create and set up the content pane.
        CardLayoutDemo demo = new CardLayoutDemo();
        demo.addComponentToPane(frame.getContentPane());
        
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }
    
    public static void main(String[] args) {
        /* Use an appropriate Look and Feel */
        try {
            //UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
            UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
        } catch (UnsupportedLookAndFeelException ex) {
            ex.printStackTrace();
        } catch (IllegalAccessException ex) {
            ex.printStackTrace();
        } catch (InstantiationException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        /* Turn off metal's use of bold fonts */
        UIManager.put("swing.boldMetal", Boolean.FALSE);
        
        //Schedule a job for the event dispatch thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}