Bonjour la liste,

J'éxécute une mini application RCP. J'utilise un objet Wizard (org.eclipse.jface.wizard.Wizard).
Le code de ma classe Wizard est le suivant
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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public class ReservationWizard extends Wizard {
	  
	...
          public void addPages() {
	    addPage(new FrontPage());
	    addPage(new CustomerInfoPage());
	    addPage(new PaymentInfoPage());
	  }    

	  public boolean performFinish() {
	    ...
	    try {
	      // puts the data into a database ...
	      getContainer().run(true, true, new IRunnableWithProgress() {
	        public void run(IProgressMonitor monitor)
	          throws InvocationTargetException, InterruptedException {
	          monitor.beginTask("Store data", 100);
	          monitor.worked(40);
	          
	          // store data here ...
	          System.out.println(data);
	          
	          WidgetTest test = new WidgetTest();
		  Shell shell = test.getShell();
		  shell.open();
		          
	          
	          Thread.sleep(2000);
	          monitor.done();
	        }
	      });
	    } catch (InvocationTargetException e) {
	      e.printStackTrace();
	    } catch (InterruptedException e) {
	      e.printStackTrace();
	    }catch (Exception e) {
	      e.printStackTrace();
	    }
	    //Display.getCurrent().dispose();
	    return true;
	  }

	  /* (non-Javadoc)
	   * @see org.eclipse.jface.wizard.IWizard#performCancel()
	   */
	  public boolean performCancel() {
	   ...
	  }  
	}
Une fois cliqué sur le bouton Finish, j'ouvre un shell. Le code de ce shell est le suivant
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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public class WidgetTest {
 
	Shell topLevelShell = null;
 
	public WidgetTest(){
		topLevelShell = new Shell();
		topLevelShell.setText("TopLevel.LigneTitre");
		topLevelShell.setLayout(new GridLayout());
		Button btnOpen = new Button(topLevelShell,SWT.PUSH);
		btnOpen.setText("Ouvrir");
		btnOpen.addSelectionListener(new SelectionListener(){
 
			@Override
			public void widgetDefaultSelected(SelectionEvent e) {
				// TODO Auto-generated method stub
 
			}
 
			@Override
			public void widgetSelected(SelectionEvent e) {
				// TODO Auto-generated method stub
				System.out.println("Bienvenue à Libreville");
			}
 
		});
 
	}
	public Shell getShell(){
		return topLevelShell;
	}
 
}
Mais seulement lors de l'exécution, quand je clique sur "Finish", j'ai l'erreur
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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java.lang.reflect.InvocationTargetException
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:415)
	at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:934)
	at wizardtest.handler.ReservationWizard.performFinish(ReservationWizard.java:75)
	at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:742)
	at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:373)
	at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1158)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3401)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3033)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
	at org.eclipse.jface.window.Window.open(Window.java:801)
	at wizardtest.handler.WizardHandler.execute(WizardHandler.java:19)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:281)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
	at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
	at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
	at org.eclipse.ui.menus.CommandContributionItem.handleWidgetSelection(CommandContributionItem.java:619)
	at org.eclipse.ui.menus.CommandContributionItem.access$10(CommandContributionItem.java:605)
	at org.eclipse.ui.menus.CommandContributionItem$4.handleEvent(CommandContributionItem.java:595)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1158)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3401)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3033)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at wizardtest.Application.start(Application.java:20)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1212)
Caused by: org.eclipse.swt.SWTException: Invalid thread access
	at org.eclipse.swt.SWT.error(SWT.java:3777)
	at org.eclipse.swt.SWT.error(SWT.java:3695)
	at org.eclipse.swt.SWT.error(SWT.java:3666)
	at org.eclipse.swt.widgets.Widget.error(Widget.java:446)
	at org.eclipse.swt.widgets.Shell.<init>(Shell.java:254)
	at org.eclipse.swt.widgets.Shell.<init>(Shell.java:245)
	at org.eclipse.swt.widgets.Shell.<init>(Shell.java:199)
	at org.eclipse.swt.widgets.Shell.<init>(Shell.java:138)
	at wizardtest.handler.WidgetTest.<init>(WidgetTest.java:19)
	at wizardtest.handler.ReservationWizard$1.run(ReservationWizard.java:84)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Si quelqu'un a une explication ou bien les pistes pour remédier à la situation, merci beaucoup d'avance.