org.eclipse.swt.snippets.Snippet151.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet151.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;

/*
 * Create a virtual table and add 1000 entries to it every 500 ms.
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.0
 */
import java.util.*;

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

public class Snippet151 {

    static int[] data = new int[0];

    public static void main(String[] args) {
        final Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 151");
        shell.setLayout(new FillLayout());
        final Table table = new Table(shell, SWT.BORDER | SWT.VIRTUAL);
        table.addListener(SWT.SetData, e -> {
            TableItem item = (TableItem) e.item;
            int index = table.indexOf(item);
            item.setText("Item " + data[index]);
        });
        Thread thread = new Thread() {
            @Override
            public void run() {
                int count = 0;
                Random random = new Random();
                while (count++ < 500) {
                    if (table.isDisposed())
                        return;
                    // add 10 random numbers to array and sort
                    int grow = 10;
                    int[] newData = new int[data.length + grow];
                    System.arraycopy(data, 0, newData, 0, data.length);
                    int index = data.length;
                    data = newData;
                    for (int j = 0; j < grow; j++) {
                        data[index++] = random.nextInt();
                    }
                    Arrays.sort(data);
                    display.syncExec(() -> {
                        if (table.isDisposed())
                            return;
                        table.setItemCount(data.length);
                        table.clearAll();
                    });
                    try {
                        Thread.sleep(500);
                    } catch (Throwable t) {
                    }
                }
            }
        };
        thread.start();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}