TableSortTwoDirection.java Source code

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Here is the source code for TableSortTwoDirection.java

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/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: IBM Corporation - initial API and implementation
 ******************************************************************************/
// package org.eclipse.swt.snippets;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Random;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;

/*
 * Show a sort indicator in the column header
 * 
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 * 
 * @since 3.2
 */

public class TableSortTwoDirection {
    public static void main(String[] args) {
        // initialize data with keys and random values
        int size = 100;
        Random random = new Random();
        final int[][] data = new int[size][];
        for (int i = 0; i < data.length; i++) {
            data[i] = new int[] { i, random.nextInt() };
        }
        // create a virtual table to display data
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());
        final Table table = new Table(shell, SWT.VIRTUAL);
        table.setHeaderVisible(true);
        table.setLinesVisible(true);
        table.setItemCount(size);
        final TableColumn column1 = new TableColumn(table, SWT.NONE);
        column1.setText("Key");
        column1.setWidth(200);
        final TableColumn column2 = new TableColumn(table, SWT.NONE);
        column2.setText("Value");
        column2.setWidth(200);
        table.addListener(SWT.SetData, new Listener() {
            public void handleEvent(Event e) {
                TableItem item = (TableItem) e.item;
                int index = table.indexOf(item);
                int[] datum = data[index];
                item.setText(new String[] { Integer.toString(datum[0]), Integer.toString(datum[1]) });
            }
        });
        // Add sort indicator and sort data when column selected
        Listener sortListener = new Listener() {
            public void handleEvent(Event e) {
                // determine new sort column and direction
                TableColumn sortColumn = table.getSortColumn();
                TableColumn currentColumn = (TableColumn) e.widget;
                int dir = table.getSortDirection();
                if (sortColumn == currentColumn) {
                    dir = dir == SWT.UP ? SWT.DOWN : SWT.UP;
                } else {
                    table.setSortColumn(currentColumn);
                    dir = SWT.UP;
                }
                // sort the data based on column and direction
                final int index = currentColumn == column1 ? 0 : 1;
                final int direction = dir;
                Arrays.sort(data, new Comparator() {
                    public int compare(Object arg0, Object arg1) {
                        int[] a = (int[]) arg0;
                        int[] b = (int[]) arg1;
                        if (a[index] == b[index])
                            return 0;
                        if (direction == SWT.UP) {
                            return a[index] < b[index] ? -1 : 1;
                        }
                        return a[index] < b[index] ? 1 : -1;
                    }
                });
                // update data displayed in table
                table.setSortDirection(dir);
                table.clearAll();
            }
        };
        column1.addListener(SWT.Selection, sortListener);
        column2.addListener(SWT.Selection, sortListener);
        table.setSortColumn(column1);
        table.setSortDirection(SWT.UP);
        shell.setSize(shell.computeSize(SWT.DEFAULT, SWT.DEFAULT).x, 300);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}