java - 如何更改实现 MigLayout 的 JDesktopPane 中显示的 JInternalFrame 的大小？

Question

在我的项目中，我使用 JFrame 作为主应用程序窗口并将 JDesktopPane 放在这个 JFrame 中。我将 MigLayout 设置为 JDesktopPane，现在的问题是我已经能够在此 JDesktopPane 上显示 JInternalFrame 但无法调整此 JInternalFrame 的大小，在这种情况下是否有任何方法可以更改 JInternalFrame 的大小？谢谢。

 package Design;

//Header Files
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JSeparator;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
import net.miginfocom.swing.MigLayout;

public class MainClass extends JFrame {

    private JPanel contentPane;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {

        MainClass frame = new MainClass();
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        int xAxisSize = ((int) toolkit.getScreenSize().getWidth());
        int yAxisSize = ((int) toolkit.getScreenSize().getHeight());
        frame.setSize(xAxisSize, yAxisSize);
        frame.setVisible(true);
        frame.setVisible(true);

    }

    /**
     * Create the frame.
     */
    public MainClass() {
        setAlwaysOnTop(true);
        final JDesktopPane desktopPane = new JDesktopPane();
        desktopPane.setLayout(new MigLayout("center panel",
                "[100px:100px:1366px,grow,shrink 50,center]",
                "[100px:100px:768px,grow,shrink 50,center]"));
        desktopPane.setBorder(new LineBorder(new Color(0, 0, 0)));
        desktopPane.setBackground(Color.WHITE);
        setForeground(Color.WHITE);
        setTitle("JFrame");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setPreferredSize(screenSize);

        JMenuBar menuBar = new JMenuBar();
        setJMenuBar(menuBar);

        JMenu mnNewMenu = new JMenu("Select");
        menuBar.add(mnNewMenu);

        JMenuItem mntmGrooups = new JMenuItem("Grooups");
        mntmGrooups.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                GroupGUIForm form = new GroupGUIForm();//Here i am calling another jinternalframe
                desktopPane.removeAll();
                desktopPane.repaint();
                form.pack();
                form.setVisible(true);
                desktopPane.add(form);
            }
        });
        mnNewMenu.add(mntmGrooups);

        JSeparator separator = new JSeparator();
        mnNewMenu.add(separator);

        JSeparator separator_2 = new JSeparator();
        mnNewMenu.add(separator_2);

        JSeparator separator_1 = new JSeparator();
        mnNewMenu.add(separator_1);

        JSeparator separator_3 = new JSeparator();
        mnNewMenu.add(separator_3);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(new MigLayout("", "[grow,shrink 50,fill]",
                "[grow]"));

        contentPane.add(desktopPane, "cell 0 0,grow");

    }
}









package Design;

import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.border.LineBorder;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;
import net.miginfocom.swing.MigLayout;

public class GroupGUIForm extends JInternalFrame {

    private JPanel groupMainContentPane;
    private JTable jTableGroupNameList;
    private JTextField textField;
    private JTextField jTextFieldGroupName;
    private JTextField jTextFieldGroupAlias;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    GroupGUIForm frame = new GroupGUIForm();//main method
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public GroupGUIForm() {
        setMaximizable(true);
        setClosable(true);
        setResizable(true);
        setFont(new Font("SansSerif", Font.PLAIN, 12));
        setVisible(true);
        setTitle("Create & Modify Group Information");
        setBounds(100, 100, 700, 450);
        groupMainContentPane = new JPanel();
        groupMainContentPane.setForeground(new Color(0, 0, 0));
        groupMainContentPane.setBorder(new TitledBorder(null, "GroupForm", TitledBorder.LEADING, TitledBorder.TOP, null, Color.GRAY));
        setContentPane(groupMainContentPane);
        groupMainContentPane
                .setLayout(new MigLayout("", "[][100px:100px:100px,grow,fill][225px:225px:225px,grow,fill][10px:10px:10px,grow,fill][][grow]", "[20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][20px:20px:20px,grow,shrink 50][][][grow][]"));

        JPanel jTablePanel = new JPanel();
        jTablePanel.setBorder(new TitledBorder(null, "Available Group List",
                TitledBorder.LEADING, TitledBorder.TOP, null, null));
        groupMainContentPane.add(jTablePanel, "cell 5 1 1 15,grow");
        jTablePanel.setLayout(new MigLayout("", "[235px]", "[][321px]"));

        JLabel lblSearch = new JLabel("Search");
        jTablePanel.add(lblSearch, "flowx,cell 0 0");

        JScrollPane jTableGroupNameScrollPane = new JScrollPane();
        jTablePanel.add(jTableGroupNameScrollPane, "cell 0 1,grow");

        jTableGroupNameList = new JTable();
        jTableGroupNameList.setFont(new Font("SansSerif", Font.PLAIN, 11));
        jTableGroupNameList
                .setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        jTableGroupNameList.setName("");
        jTableGroupNameList.setAutoCreateRowSorter(true);
        jTableGroupNameList.setBorder(new LineBorder(new Color(0, 0, 0)));
        jTableGroupNameList.setModel(new DefaultTableModel(new Object[][] {
                { "John", null }, { "Bill", null }, { "Edmond", null },
                { "Adam", null }, { "", null },
                { null, null }, { null, null }, { null, null }, { null, null },
                { null, null }, { null, null }, { null, null }, { null, null },
                { null, null }, { null, null }, { null, null }, { null, null },
                { null, null }, { null, null }, { null, null }, },
                new String[] { "Avaliable Group Names", "" }));
        jTableGroupNameList.getColumnModel().getColumn(1).setPreferredWidth(15);
        jTableGroupNameList.getColumnModel().getColumn(1).setMinWidth(0);
        jTableGroupNameList.getColumnModel().getColumn(1).setMaxWidth(0);
        jTableGroupNameScrollPane.setViewportView(jTableGroupNameList);

        textField = new JTextField();
        jTablePanel.add(textField, "cell 0 0");
        textField.setColumns(20);

        JLabel lblNewLabel = new JLabel("Group Name:");
        groupMainContentPane.add(lblNewLabel, "cell 1 3,alignx trailing");

        jTextFieldGroupName = new JTextField();
        groupMainContentPane.add(jTextFieldGroupName, "cell 2 3,growx");
        jTextFieldGroupName.setColumns(10);

        JLabel lblNewLabel_1 = new JLabel("Group Alilas:");
        groupMainContentPane.add(lblNewLabel_1, "cell 1 6,alignx trailing");

        jTextFieldGroupAlias = new JTextField();
        groupMainContentPane.add(jTextFieldGroupAlias, "cell 2 6,growx");
        jTextFieldGroupAlias.setColumns(10);

        JLabel lblNewLabel_2 = new JLabel("Group Under:");
        groupMainContentPane.add(lblNewLabel_2, "cell 1 9,alignx trailing");

        JComboBox jComboBoxGroupUnder = new JComboBox();
        groupMainContentPane.add(jComboBoxGroupUnder, "cell 2 9,growx");

        JPanel jButtonsPanel = new JPanel();
        groupMainContentPane
                .add(jButtonsPanel, "cell 1 12 5 1,grow,dock south");
        jButtonsPanel.setLayout(new MigLayout("",
                "[55px][53px][63px][65px][][][]", "[23px]"));

        JButton btnBack = new JButton("Back");
        jButtonsPanel.add(btnBack, "cell 1 0,alignx left,aligny top");

        JButton btnNew = new JButton("New");
        jButtonsPanel.add(btnNew, "cell 2 0,alignx left,aligny top");

        JButton btnDelete = new JButton("Delete");
        jButtonsPanel.add(btnDelete, "cell 3 0,alignx left,aligny top");

        JButton btnSubmit = new JButton("Submit");
        jButtonsPanel.add(btnSubmit, "cell 6 0,alignx left,aligny top");
    }

    public JLabel getLblNewLabel() {
        return getLblNewLabel();
    }

    public JPanel getGroupMainContentPane() {
        return groupMainContentPane;
    }

    public JTable getTable() {
        return jTableGroupNameList;
    }
}

Answer 1

问题是您要在 JDesktopPane 上设置布局。只需通过设置大小和位置将窗体置于桌面 Pane 的中心。 JDesktopPane 的要点是允许用户移动和调整组件大小，在 Pane 上设置 MiGLayout 会破坏这一点。

另外，您的 SSCCE 太长了，包含很多垃圾。以下是您的 SSCCE 可能看起来喜欢的示例:

import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import net.miginfocom.swing.MigLayout;

public class MainClass {

    public static void main(String[] args) {
        JFrame frame = new JFrame ();
        frame.setVisible(true);
        frame.setAlwaysOnTop(true);
        final JDesktopPane desktopPane = new JDesktopPane();
        desktopPane.setLayout(new MigLayout("center panel",
                "[100px:100px:1366px,grow,shrink 50,center]",
                "[100px:100px:768px,grow,shrink 50,center]"));
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        
        JInternalFrame form = new JInternalFrame();
        form.setResizable(true);      
        form.setVisible(true);
        desktopPane.add(form);
        frame.add(desktopPane);
    }
}