TableWithPageSize.java Source code

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Here is the source code for TableWithPageSize.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;
/*
 * Virtual Table example snippet: create a table with 1,000,000 items (lazy, page size 64)
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 * 
 * @since 3.0
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
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.TableItem;

public class TableWithPageSize {

    static final int PAGE_SIZE = 64;

    static final int COUNT = 100000;

    public static void main(String[] args) {
        Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setLayout(new RowLayout(SWT.VERTICAL));
        final Table table = new Table(shell, SWT.VIRTUAL | SWT.BORDER);
        table.addListener(SWT.SetData, new Listener() {
            public void handleEvent(Event event) {
                TableItem item = (TableItem) event.item;
                int index = table.indexOf(item);
                int start = index / PAGE_SIZE * PAGE_SIZE;
                int end = Math.min(start + PAGE_SIZE, table.getItemCount());
                for (int i = start; i < end; i++) {
                    item = table.getItem(i);
                    item.setText("Item " + i);
                }
            }
        });
        table.setLayoutData(new RowData(200, 200));
        long t1 = System.currentTimeMillis();
        table.setItemCount(COUNT);
        long t2 = System.currentTimeMillis();
        System.out.println("Items: " + COUNT + ", Time: " + (t2 - t1) + " (ms) [page=" + PAGE_SIZE + "]");
        shell.layout();
        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}