| /******************************************************************************* |
| * Copyright (c) 2000, 2016 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; |
| |
| /* |
| * SWT Table snippet: scroll a Table one "page" at a time. |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet51 { |
| |
| public static void main(String [] args) { |
| Display display = new Display(); |
| Shell shell = new Shell(display); |
| shell.setBounds(10,10,300,300); |
| shell.setLayout(new GridLayout(2,true)); |
| final Table table = new Table(shell, SWT.NONE); |
| GridData data = new GridData(GridData.FILL_BOTH); |
| data.horizontalSpan = 2; |
| table.setLayoutData(data); |
| for (int i = 0; i < 99; i++) { |
| new TableItem(table, SWT.NONE).setText("item " + i); |
| } |
| Button upButton = new Button(shell, SWT.PUSH); |
| upButton.setText("Scroll up one page"); |
| upButton.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); |
| upButton.addListener(SWT.Selection, event -> { |
| int height = table.getClientArea().height; |
| int visibleItemCount = height / table.getItemHeight(); |
| int topIndex = table.getTopIndex(); |
| int newTopIndex = Math.max(0, topIndex - visibleItemCount); |
| if (topIndex != newTopIndex) { |
| table.setTopIndex(newTopIndex); |
| } |
| }); |
| Button downButton = new Button(shell, SWT.PUSH); |
| downButton.setText("Scroll down one page"); |
| downButton.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); |
| downButton.addListener(SWT.Selection, event -> { |
| int height = table.getClientArea().height; |
| int visibleItemCount = height / table.getItemHeight(); |
| int topIndex = table.getTopIndex(); |
| int newTopIndex = Math.min(table.getItemCount(), topIndex + visibleItemCount); |
| if (topIndex != newTopIndex) { |
| table.setTopIndex(newTopIndex); |
| } |
| }); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) display.sleep(); |
| } |
| display.dispose(); |
| } |
| |
| } |