| /******************************************************************************* |
| * 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 |
| * Lars Vogel <Lars.Vogel@vogella.com> - Bug 502845 |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * BusyIndicator example snippet: display busy cursor during long running task |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| */ |
| |
| import static org.eclipse.swt.events.SelectionListener.*; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.custom.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet130 { |
| |
| public static void main(String[] args) { |
| final Display display = new Display(); |
| final Shell shell = new Shell(display); |
| shell.setLayout(new GridLayout()); |
| final Text text = new Text(shell, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL); |
| text.setLayoutData(new GridData(GridData.FILL_BOTH)); |
| final int[] nextId = new int[1]; |
| Button b = new Button(shell, SWT.PUSH); |
| b.setText("invoke long running job"); |
| b.addSelectionListener(widgetSelectedAdapter(e-> { |
| Runnable longJob = new Runnable() { |
| boolean done = false; |
| int id; |
| @Override |
| public void run() { |
| Thread thread = new Thread(() -> { |
| id = nextId[0]++; |
| display.syncExec(() -> { |
| if (text.isDisposed()) return; |
| text.append("\nStart long running task "+id); |
| }); |
| for (int i = 0; i < 100000; i++) { |
| if (display.isDisposed()) return; |
| System.out.println("do task that takes a long time in a separate thread "+id); |
| } |
| if (display.isDisposed()) return; |
| display.syncExec(() -> { |
| if (text.isDisposed()) return; |
| text.append("\nCompleted long running task "+id); |
| }); |
| done = true; |
| display.wake(); |
| }); |
| thread.start(); |
| while (!done && !shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| } |
| }; |
| BusyIndicator.showWhile(display, longJob); |
| })); |
| shell.setSize(250, 150); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| display.dispose(); |
| } |
| } |