tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug186268_TableItemSetTextBottom.java

/*******************************************************************************
 * Copyright (c) 2018 Red Hat 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:
 *     Red Hat - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.tests.gtk.snippets;


import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
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 Bug186268_TableItemSetTextBottom {

    static final int COUNT = 1000000;

    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 () {
            @Override
			public void handleEvent (Event event) {
                TableItem item = (TableItem) event.item;
                int index = table.indexOf (item);
                long startTime = System.currentTimeMillis();
                item.setText ("Item " + index);
                long timeTaken = System.currentTimeMillis() - startTime;
                System.out.println ("row " + index + " took " + timeTaken +
"ms");
            }
        });
        table.setLayoutData (new RowData (200, 200));
        Button button = new Button (shell, SWT.PUSH);
        button.setText ("Add Items");
        final Label label = new Label(shell, SWT.NONE);
        button.addListener (SWT.Selection, new Listener () {
            @Override
			public void handleEvent (Event event) {
                long t1 = System.currentTimeMillis ();
                table.setItemCount (COUNT);
                long t2 = System.currentTimeMillis ();
                label.setText ("Items: " + COUNT + ", Time: " + (t2 - t1) +
" (ms)");
                shell.layout ();
            }
        });
        shell.pack ();
        shell.open ();
        while (!shell.isDisposed ()) {
            if (!display.readAndDispatch ()) display.sleep ();
        }
        display.dispose ();
    }
}