Java Reference
In-Depth Information
Listing 18-8.
Mouse Listener for Table Sorting
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.util.*;
public class TableHeaderSorter extends MouseAdapter {
private TableSorter sorter;
private JTable table;
private TableHeaderSorter() {
}
public static void install(TableSorter sorter, JTable table) {
TableHeaderSorter tableHeaderSorter = new TableHeaderSorter();
tableHeaderSorter.sorter = sorter;
tableHeaderSorter.table = table;
JTableHeader tableHeader = table.getTableHeader();
tableHeader.addMouseListener(tableHeaderSorter);
}
public void mouseClicked(MouseEvent mouseEvent) {
TableColumnModel columnModel = table.getColumnModel();
int viewColumn = columnModel.getColumnIndexAtX(mouseEvent.getX());
int column = table.convertColumnIndexToModel(viewColumn);
if (mouseEvent.getClickCount() == 1 && column != -1) {
System.out.println("Sorting ...");
int shiftPressed = (mouseEvent.getModifiers() & InputEvent.SHIFT_MASK);
boolean ascending = (shiftPressed == 0);
sorter.sortByColumn(column, ascending);
}
}
}
■
Note
Chapter 19 includes a demonstration using the
TableSorter
to sort a table of system properties.
TableColumnModel Interface
TableColumnModel
is one of those interfaces that lives in the background and usually doesn't
require much attention. It basically manages the set of columns currently being displayed by a
JTable
. Unless triggered to do otherwise, when a
JTable
is created, the component builds a
