防止在jxtable中排序前三行

Question

我有一个JXtable.我想阻止排名前三行.基本上,前3行应始终位于顶部,其余的应根据其值进行排序.

在SO上有一个类似的问题,但我不知道如何真正将它应用于我的使用 Sort ROW,除了最后一行

主要区别在于我正在使用JXTable.有一种简单的方法可以做到这一点,我错过了吗？

这是我的JXtable代码

jTable1 = new JXTable();
if (isClickable) {
    jTable1.getTableHeader().setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));

    //set the sorter here
} else {
    jTable1.setSortable(false);
}

Answer 1

好吧，我花了一些时间来尽我所能地完善它，但这是我的工作示例。

基本上，我创建了一个名为的包装类，ComparableWrapper它实现了 Comparable，因此可以操纵每列的排序。对于表模型，我添加了一个setData(Object[][] data)方法，该方法自动将所有数据值包装在ComparableWrapper. sorted构造函数中的参数决定ComparableWrapper该值是否应该正常排序，或者无论如何都保留在顶部。

您必须在一些地方手动更改列的类类型。无论如何，这是我的 SSCCE：

import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.table.AbstractTableModel;
import org.jdesktop.swingx.JXTable;

public class TableTest extends JFrame {

    public TableTest() {
        super("JXTable - first 3 rows aren't sorted");
        setLayout(new BorderLayout());

        MyTableModel model = new MyTableModel();
        JXTable table = new JXTable();
        table.setModel(model);

        Object[][] initialData = {
            {"Zoe", new Integer(26)},
            {"Adam", new Integer(29)},
            {"Trisha", new Integer(33)},
            {"Reed", new Integer(20)},
            {"John", new Integer(3)},
            {"Kyle", new Integer(102)},
            {"Billy Bob", new Integer(27)},
            {"Sandra", new Integer(87)},
            {"Steve", new Integer(50)},
            {"Guy", new Integer(23)},
            {"Kenzie", new Integer(25)},
            {"Mary", new Integer(27)},
            {"Sally", new Integer(12)},
            {"Joe", new Integer(101)},
            {"Billy", new Integer(44)},
            {"Bob", new Integer(83)},
        };
        model.setData(initialData);

        JScrollPane tableScroll = new JScrollPane(table);
        add(tableScroll, BorderLayout.CENTER);

        table.setFillsViewportHeight(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400, 600);
        setVisible(true);
        setLocationRelativeTo(null);
    }

    private class MyTableModel extends AbstractTableModel {

        String[] columns = { "First Name", "Age" };
        Object[][] data = {};

        public void setData(Object[][] data) {
            for (int i=0; i<data.length; i++) {
                // Don't sort top 3 rows
                boolean sorted = i < 3 ? false : true;

                // Wrap each object so the sorting can be manipulated.
                // Change these class types as needed.
                data[i][0] = new ComparableWrapper<String>((String) data[i][0], sorted);
                data[i][1] = new ComparableWrapper<Integer>((Integer) data[i][1], sorted);
            }
            this.data = data;
            fireTableDataChanged();
        }

        @Override
        public Class<?> getColumnClass(int col) {
            return ComparableWrapper.class;
        }

        @Override
        public int getColumnCount() {
            return columns.length;
        }

        @Override
        public int getRowCount() {
            return data.length;
        }

        @Override
        public Object getValueAt(int row, int col) {
            return data[row][col];
        }

        @Override
        public String getColumnName(int col) {
            return columns[col];
        }

    }

    private class ComparableWrapper<T> implements Comparable<ComparableWrapper<T>> {

        private Comparable<T> object;
        private boolean sorted;

        public ComparableWrapper(Comparable<T> object, boolean sorted) {
            this.object = object;
            this.sorted = sorted;
        }

        @Override
        public int compareTo(ComparableWrapper<T> o) {
            if (object instanceof Comparable<?>) {
                if (sorted && o.isSorted()) {
                    // Sort normally by default
                    return object.compareTo(o.getObject());
                } else {
                    // If an un-sorted row is being compared, don't compare at all
                    return 0;
                }
            }

            // Fallback
            return 0;
        }

        public T getObject() {
            return (T) object;
        }

        public boolean isSorted() {
            return sorted;
        }

        @Override
        public String toString() {
            return object.toString();
        }

    }

    public static void main(String[] args) {
        new TableTest();
    }

}