调整JList的大小问题？

Question

i am having resizing problem with JList ... Below is my code ...my requirement is to add a JList with some fixed size into a Panel and when i maximize/minimize the Frame the JList should increase/decrease accordingly .please help me ..how to achieve this?

Following is the design:

Hi Carl , It works in simple cases but not in the above case. So i am explaning the above code now ..

i have a frame called "TestListControl" with GB layout. Add selectDevicesPanel with GB layout. In selectDevicesPanel : Add selectNamesInnerPanel with GB layout In selectNamesInnerPanel : Add selectNameAddPanel with GB layout Add selectTeamPanel with Flow layout In selectNameAddPanel: chooseDeviceScrollPane clickToAddDeletePanel selectedNameScrollPane In selectTeamPanel : selectTeamLabel selectTeamComboBox

public class TestListControl extends javax.swing.JFrame {

    public TestListControl() {
        initComponents();
    }

    private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;

        selectDevicesPanel = new javax.swing.JPanel();
        selectNamesInnerPanel = new javax.swing.JPanel();
        selectNameAddPanel = new javax.swing.JPanel();
        chooseDeviceScrollPane = new javax.swing.JScrollPane();
        chooseNamesList = new javax.swing.JList();
        clickToAddDeletePanel = new javax.swing.JPanel();
        clickToAddButton = new javax.swing.JButton();
        clickToRemoveButton = new javax.swing.JButton();
        selectedNameScrollPane = new javax.swing.JScrollPane();
        selectedNamesList = new javax.swing.JList();
        selectNameLabel = new javax.swing.JLabel();
        selectTeamPanel = new javax.swing.JPanel();
        selectTeamLabel = new javax.swing.JLabel();
        selectTeamComboBox = new javax.swing.JComboBox();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        selectDevicesPanel.setBorder(javax.swing.BorderFactory
                .createTitledBorder("Member Selection"));
        selectDevicesPanel.setLayout(new java.awt.GridBagLayout());

        selectNamesInnerPanel.setLayout(new java.awt.GridBagLayout());

        selectNameAddPanel.setLayout(new java.awt.GridBagLayout());

        chooseNamesList.setModel(new javax.swing.AbstractListModel() {
            String[] strings = { "XXXX", "YYYY", "ZZZZ" };

            public int getSize() {
                return strings.length;
            }

            public Object getElementAt(int i) {
                return strings[i];
            }
        });
        chooseNamesList.setMaximumSize(new java.awt.Dimension(46, 88));
        chooseNamesList.setMinimumSize(new java.awt.Dimension(94, 98));
        chooseDeviceScrollPane.setViewportView(chooseNamesList);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 12, 7, 0);
        selectNameAddPanel.add(chooseDeviceScrollPane, gridBagConstraints);

        clickToAddDeletePanel.setLayout(new java.awt.GridBagLayout());

        clickToAddButton.setText(">>");
        clickToAddDeletePanel.add(clickToAddButton,
                new java.awt.GridBagConstraints());

        clickToRemoveButton.setText("<<");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        clickToAddDeletePanel.add(clickToRemoveButton, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.insets = new java.awt.Insets(0, 5, 0, 5);
        selectNameAddPanel.add(clickToAddDeletePanel, gridBagConstraints);

        selectedNamesList.setModel(new javax.swing.AbstractListModel() {
            String[] strings = { "XXXX", "YYYY" };

            public int getSize() {
                return strings.length;
            }

            public Object getElementAt(int i) {
                return strings[i];
            }
        });
        selectedNamesList.setMinimumSize(new java.awt.Dimension(94, 98));
        selectedNameScrollPane.setViewportView(selectedNamesList);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 6, 0);
        selectNameAddPanel.add(selectedNameScrollPane, gridBagConstraints);

        selectNameLabel.setText("Select Name");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 8, 0);
        selectNameAddPanel.add(selectNameLabel, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        selectNamesInnerPanel.add(selectNameAddPanel, gridBagConstraints);

        selectTeamLabel.setText("Select Team");
        selectTeamPanel.add(selectTeamLabel);

        selectTeamComboBox.setModel(new javax.swing.DefaultComboBoxModel(
                new String[] { "TEAM X", "TEAM Y", "TEAM Z" }));
        selectTeamComboBox
                .addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent evt) {
                        selectTeamComboBoxActionPerformed(evt);
                    }
                });
        selectTeamPanel.add(selectTeamComboBox);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        selectNamesInnerPanel.add(selectTeamPanel, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        selectDevicesPanel.add(selectNamesInnerPanel, gridBagConstraints);

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(
                getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(layout.createParallelGroup(
                org.jdesktop.layout.GroupLayout.LEADING).add(0, 400,
                Short.MAX_VALUE).add(
                layout.createParallelGroup(
                        org.jdesktop.layout.GroupLayout.LEADING).add(
                        layout.createSequentialGroup().add(0, 107,
                                Short.MAX_VALUE).add(selectDevicesPanel,
                                org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                                185,
                                org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                                .add(0, 108, Short.MAX_VALUE))));
        layout.setVerticalGroup(layout.createParallelGroup(
                org.jdesktop.layout.GroupLayout.LEADING).add(0, 300,
                Short.MAX_VALUE).add(
                layout.createParallelGroup(
                        org.jdesktop.layout.GroupLayout.LEADING).add(
                        layout.createSequentialGroup().add(0, 39,
                                Short.MAX_VALUE).add(selectDevicesPanel,
                                org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,
                                221,
                                org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                                .add(0, 40, Short.MAX_VALUE))));

        pack();
    }

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

    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new TestListControl().setVisible(true);
            }
        });
    }

    private javax.swing.JScrollPane chooseDeviceScrollPane;
    private javax.swing.JList chooseNamesList;
    private javax.swing.JButton clickToAddButton;
    private javax.swing.JPanel clickToAddDeletePanel;
    private javax.swing.JButton clickToRemoveButton;
    private javax.swing.JPanel selectDevicesPanel;
    private javax.swing.JPanel selectNameAddPanel;
    private javax.swing.JLabel selectNameLabel;
    private javax.swing.JPanel selectNamesInnerPanel;
    private javax.swing.JComboBox selectTeamComboBox;
    private javax.swing.JLabel selectTeamLabel;
    private javax.swing.JPanel selectTeamPanel;
    private javax.swing.JScrollPane selectedNameScrollPane;
    private javax.swing.JList selectedNamesList;

}

Answer 1

如果您这样做，您的列表将不会变得更大：

chooseNamesList.setMaximumSize(new java.awt.Dimension(46, 88));

Answer 2

If you set a prototype cell value, the JList will not resize when the data is changed.

See The JList Javadoc page for the setPrototypeCellValue(Object) method.

Answer 3

伙计们，我自己解决了这个问题..谢谢您的协调..实际上我犯了一个错误，即给拥有Jlist和JEditor窗格的父面板赋予weightx和weighty……简而言之，我们需要设置包含要调整大小的任何组件的所有父容器的重量参数。