How can you disable all sorting code in JTable in 1.6

问题

I have a JTable extension that has been in use since Java 1.3/1.4 in the project that provided things like column reordering and sorting by clicking on the column. We are upgrading to Java 1.6, and the new JTable stops the old sorting code from working. It would be somewhat extensive rework to fit everything to the new JTable API. Until then is there a way to completely disable those additions in JTable?

Edit: After the further investigation, the problem is centered around the fact that the mouse events on the header are swallowed by Swing in 1.6, and not passed on to the table implementation, even though it sets its own header rendered. So much for vaunted Java backwards compatibility.

So is there a way to get JTable 1.6 to stop? I haven't been able to. Even overriding the UI on the table and the table header didn't help.

回答1:

Have you tried JTable.setRowSorter(null) ?

edit : and setAutoCreateRowSorter ? (1. create table, 2. row sorter to null, 3. autocreate sorter to false, 4. set model).

回答2:

I use this in my JTable subclass and it catches mouse events just fine:

class QueueTable extends JTable {
    public QueueTable() {
        ...
        getTableHeader().addMouseListener(new SortColumnListener(1));
    }
}

The SortColumnListener is implemented like so:

class SortColumnListener extends MouseAdapter {
    SortColumnListener(int column) { ... }

    public void mouseClicked(MouseEvent e) {
        TableColumnModel colModel = QueueTable.this.getColumnModel();
        int columnModelIndex = colModel.getColumnIndexAtX(e.getX());

        if(columnModelIndex == column) {
            // Do stuff
        }
    }
}

This catches mouse events in the SortColumnListener just fine and I can do whatever I want with those events. I have no RowSorter implementation set on the JTable and this works perfectly in Java 5 and Java 6.

For full sourcecode of this class, see: QueueTable.java

回答3:

As I understand it you have two problems here:

1. Because of the new sorting code in JTable, your sorting does not work.
2. Even if you disable sorting by setRowSorter(null) or by overriding the setRowSorter(TableRowsorter) to do nothing, it does not work because the events on header are not passed to your JTable.

In that case I think the option for you is to just have your sorting code implemented as TableRowSorter. I am not aware how complex your sorting code is and whether it can map the TableRowSorter API, but this seems to be one more alternative you can try.

回答4:

JTable.setAutoCreateRowSorter(false);

Unless the TableRowSorter is set somewhere, I don't think that you have to call setRowSorter(null)

回答5:

A way to disable sorting when clicking on the header, is to remove all the table header's listeners:

        for(MouseListener listener : table.getTableHeader().getMouseListeners()){
        table.getTableHeader().removeMouseListener(listener);
    }

Then in case you want some other specific action (like column resizing) you could just add a specific listener for that particular action.

回答6:

I tested all possibilities mentioned here on Sun table sort example and they all are working.

Unfortunately there are still many bugs in table sorting. There can not be much done until you post your code here. One possibility is to try out SwingX solution.

回答7:

I solved your problem in your edit:

package jtableheadermouseevent;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

/**
 *
 * @author martijn
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        JFrame fr = new JFrame("JTable Header Mouse Listener");
        fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        final JTable table = new JTable();
        JScrollPane pane = new JScrollPane(table);

        String[][] data = {{"Foo", "Bar"}, {"Baz", "Coffee"}};
        String[] columns = {"Header 0", "Header 1"};

        DefaultTableModel model = new DefaultTableModel(data, columns);
        table.setModel(model);
        fr.add(pane);
        table.getTableHeader().addMouseListener(new MouseAdapter() {

            @Override
            public void mouseClicked(MouseEvent e) {
                super.mouseClicked(e);
                System.out.println("Header clicked : (X: " + e.getX() + ", Y: " + e.getY() + ") With button " + e.getButton() );
                int header = table.getTableHeader().columnAtPoint(e.getPoint());
                System.out.println("This means header " + header + " is clicked!");
            }

        });
        fr.pack();
        fr.setSize(800, 300);
        fr.setVisible(true);
    }

}

This works perfect in Linux, so I suppose also on OSX and Windows. I also tested it after resizing the columns: it still know which columns was pressed. But after reordering the columns, the column which was first "column 0" became "column 1".
But you can always disallow the user to move the columns with this:

table.getTableHeader().setReorderingAllowed(false);

Hope this helps

回答8:

Try this:

public abstract class BaseTable extends JTable {
    public BaseTable() {
        init();
        ..
    }

    protected boolean sortableDisable() {
        return false;
    }

    private void init() {
        TableRowSorter<BaseTableModel> sorter =
            new TableRowSorter<BaseTableModel>(tableModel);
        if (sortableDisable()) {
            setAutoCreateRowSorter(false);
            for (int c = 0; c < tableModel.getColumnCount(); c++) {
                sorter.setSortable(c, false);
            }
        }
        setRowSorter(sorter);
        ..
    }
}

public class TableX extends BaseTable() {

    @Override
    protected boolean sortableDisabled() {
        return true;
    }
    ..
}

来源：https://stackoverflow.com/questions/3312953/how-can-you-disable-all-sorting-code-in-jtable-in-1-6