====== Accessing UI from Background Job ======
In SWT (Eclipse) the UI can only be access and modified from the main Thread. Everything else results in an error:

  org.eclipse.swt.SWTException: Invalid thread access
  
This can be fixed by synchronizing the with the main thread.

In Eclipse e4 a ''UISynchronize'' instance can be injected like this:

  @Inject private UISynchronize sync;
  
This allows us to run something from a background job accessing the UI.

<sxh java>
sync.asyncExec(new Runnable() {
				
  @Override
  public void run() {
    // your UI access here
  }
});
</sxh>

===== Links =====
  * [[http://www.vogella.com/articles/EclipseJobs/article.html | Eclipse Jobs]]

{{tag>e4 devel java}}