Question

我遇到JTabbedPane的问题，我的JPanel之一有边框，我认为JTabbedPane有自己的布局，因此边框基本上会根据布局展开JTabbedPane就像这样：

然后我尝试使用JTabbedPane更改jTabbedPane.setLayout(new GridBagLayout());的边框，但这完全混淆了它，结果是这样的：

我一直试图让它看起来像这样（为了澄清，我试图实现内部边界，而不是外部边界。）：

是否可以实际更改布局以适应我想要实现的目标，还是有更好的方法？

非常感谢任何帮助，谢谢。如果我的问题需要改进或者需要任何其他代码或澄清，请告诉我。

代码：

import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import java.awt.*;

public class Test extends JFrame
{
    public Test()
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            @Override
            public void run()
            {
                try
                {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch(Exception e)
                {
                    e.printStackTrace();
                }

                setLayout(new GridBagLayout());

                add(new HomePanel());

                pack();
                setVisible(true);
                setLocationRelativeTo(null);
                setExtendedState(JFrame.MAXIMIZED_BOTH);
                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            }
        });
    }

    public static void main(String[] args)
    {
        Test t = new Test();
    }

    public class HomePanel extends JPanel
    {
        protected JTabbedPane tabbedPane;

        public HomePanel()
        {
            tabbedPane = new JTabbedPane();
            tabbedPane.setPreferredSize(new Dimension(800, 500));

            tabbedPane.addTab("Your Bookings", new ShowBookingPanel());

            add(tabbedPane);

        }
    }

    public class ShowBookingPanel extends JPanel
    {
        protected JTable bookingTable;
        protected JScrollPane scrollPane;


        public ShowBookingPanel()
        {
            TitledBorder titledBorder = new TitledBorder("Your Bookings");
            titledBorder.setTitleJustification(TitledBorder.CENTER);
            Border border = new CompoundBorder(titledBorder, new EmptyBorder(40, 50, 40, 50));

            setBorder(border);

            String[] columnNames = {"Check-In Date", "Check-Out Date", "Room Type", "Price", "Action"};
            Object[][] data = {{"22/09/1997", "TBA", "Single", "Priceless"}, {"12/03/2017", "23/04/2017", "Double", "£50"},
                {"12/03/2017", "23/04/2017", "Double", "£50"}, {"12/03/2017", "23/04/2017", "Double", "£50"},
                {"12/03/2017", "23/04/2017", "Double", "£50"}, {"12/03/2017", "23/04/2017", "Double", "£50"},
                {"12/03/2017", "23/04/2017", "Double", "£50"}, {"12/03/2017", "23/04/2017", "Double", "£50"}};

            TableModel model = new DefaultTableModel(data, columnNames)
            {
                public boolean isCellEditable(int row, int column)
                {
                    return false;
                }
            };

            bookingTable = new JTable(model);
            bookingTable.setPreferredScrollableViewportSize(new Dimension(500, 300));
            bookingTable.setFillsViewportHeight(true);
            bookingTable.getTableHeader().setReorderingAllowed(false);
            bookingTable.getTableHeader().setResizingAllowed(false);
          bookingTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

            scrollPane = new JScrollPane(bookingTable);

            setLayout(new GridBagLayout());

            add(scrollPane);
        }
    }
}

Answer 1

更改：

        tabbedPane.addTab("Your Bookings", new ShowBookingPanel());

致：

        JPanel centeredPanel = new JPanel(new GridBagLayout());
        centeredPanel.add(new ShowBookingPanel());

        tabbedPane.addTab("Your Bookings", centeredPanel);

只要使用默认约束将组件添加为唯一组件而不拉伸组件，GridBagLayout将使组件居中。

是否可以更改JTabbedPane的布局？

1 个答案: