| /******************************************************************************* |
| * 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.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| 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.TableColumn; |
| import org.eclipse.swt.widgets.TableItem; |
| |
| |
| public class Bug323240_VirtualTableSlowScroll { |
| |
| static final int COUNT = 2000; |
| |
| public static void main(String[] args) { |
| Display display = new Display (); |
| final Shell shell = new Shell (display); |
| shell.setLayout (new GridLayout()); |
| 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); |
| item.setText (0, "Item " + index); |
| |
| for (int i = 1; i <= 10; i++) { |
| item.setText(i, index + " test " + i); |
| } |
| |
| } |
| }); |
| |
| GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true); |
| gridData.heightHint = 200; |
| table.setLayoutData(gridData); |
| |
| table.setHeaderVisible(true); |
| table.setLinesVisible(true); |
| |
| Button button = new Button (shell, SWT.PUSH); |
| button.setText ("Add Items"); |
| |
| for (int i = 1; i <= 10; i++) { |
| TableColumn column = new TableColumn(table, SWT.NONE); |
| column.setText("header " + i); |
| } |
| |
| |
| 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 (); |
| } |
| }); |
| |
| for (TableColumn column: table.getColumns()) { |
| column.pack(); |
| } |
| |
| shell.pack (); |
| shell.open (); |
| while (!shell.isDisposed ()) { |
| if (!display.readAndDispatch ()) display.sleep (); |
| } |
| display.dispose (); |
| } |
| } |