examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet2.java

/*******************************************************************************
 * Copyright (c) 2000, 2016 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.text.*;
import java.util.*;

/*
 * Table example snippet: sort a table by column
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.2
 */
import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet2 {

public static void main (String [] args) {
    Display display = new Display ();
    Shell shell = new Shell (display);
    shell.setLayout(new FillLayout());
    final Table table = new Table(shell, SWT.BORDER);
    table.setHeaderVisible(true);
    final TableColumn column1 = new TableColumn(table, SWT.NONE);
    column1.setText("Column 1");
    final TableColumn column2 = new TableColumn(table, SWT.NONE);
    column2.setText("Column 2");
    TableItem item = new TableItem(table, SWT.NONE);
    item.setText(new String[] {"a", "3"});
    item = new TableItem(table, SWT.NONE);
    item.setText(new String[] {"b", "2"});
    item = new TableItem(table, SWT.NONE);
    item.setText(new String[] {"c", "1"});
    column1.setWidth(100);
    column2.setWidth(100);
    Listener sortListener = e -> {
	    TableItem[] items = table.getItems();
	    Collator collator = Collator.getInstance(Locale.getDefault());
	    TableColumn column = (TableColumn)e.widget;
	    int index = column == column1 ? 0 : 1;
	    for (int i = 1; i < items.length; i++) {
	        String value1 = items[i].getText(index);
	        for (int j = 0; j < i; j++){
	            String value2 = items[j].getText(index);
	            if (collator.compare(value1, value2) < 0) {
	                String[] values = {items[i].getText(0), items[i].getText(1)};
	                items[i].dispose();
	                TableItem item1 = new TableItem(table, SWT.NONE, j);
	                item1.setText(values);
	                items = table.getItems();
	                break;
	            }
	        }
	    }
	    table.setSortColumn(column);
	};
    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 ();
}

}