org.eclipse.swt.snippets.Snippet2.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet2.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

import java.text.*;
import java.util.*;

import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

/*
 * 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
 */
public class Snippet2 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 2");
        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();
    }

}