More safe update of property section title

* Only react on EMF events when INamedElement::name is set
  (this is supposed to resolve the "SWT Widget is disposed" exception)
* Ensure that update is perform from the UI context. The underlying
  model change could be programmatic and triggered from a different
  thread (resolves "SWTException: Invalid thread access")

Issue-Ref: 3618
Issue-Url: https://af3-developer.fortiss.org/issues/3618



Signed-off-by: Simon Barner <barner@fortiss.org>

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/.ratings

@@ -10,7 +10,7 @@ ModelEditorBindingBase.java 4c5ac569c0b6e7678fc8191096b26dfd09fdcb98 GREEN
 ModelElementHandlerBase.java 384727748f125c9d43f19d9c0eba4ba1be5a7a26 GREEN
 MultiEObjectActionBase.java 9e237d8ea640c4194e4877af4a9cfce88698e543 GREEN
 NamedCommentedModelElementHandlerBase.java 681b98b50b362f01abb7a36f108f4f11b9e51829 GREEN
-PropertySectionBase.java 02836dd112912771d99fe8845e0774e29381f724 GREEN
+PropertySectionBase.java 7b893ca28d86a415d9fc7a818e65c04ed244e896 YELLOW
 TutorialStepUIAtomicBase.java cea2a158158b476de2108d2309afcf47f217b6d9 GREEN
 TutorialStepUIAtomicWithWhitelistBase.java a9788ae514f62d27169c737ef59fb583234b5d43 GREEN
 TutorialStepUICompositeBase.java 8225210eacb5b88de47d78280c5819f572f00ffa GREEN

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/extension/base/PropertySectionBase.java

@@ -52,11 +52,13 @@ import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.views.properties.tabbed.AbstractPropertySection;
 import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage;
+import org.fortiss.tooling.kernel.model.FortissToolingKernelPackage;
 import org.fortiss.tooling.kernel.model.ILibraryElementReference;
 import org.fortiss.tooling.kernel.service.ILibraryService;
 
@@ -75,10 +77,15 @@ public abstract class PropertySectionBase extends AbstractPropertySection {
 		/** {@inheritDoc} */
 		@Override
 		public void notifyChanged(org.eclipse.emf.common.notify.Notification msg) {
-			if(msg.getEventType() != Notification.REMOVING_ADAPTER) {
-				// Updates the tabbed property sheets title
-				tabbedPropertySheetPage.labelProviderChanged(null);
+			if(msg.getEventType() == Notification.SET &&
+					msg.getFeature() == FortissToolingKernelPackage.Literals.INAMED_ELEMENT__NAME) {
+				// Model change could be programmatic: wrap the update into asyncExec().
+				Display.getDefault().asyncExec(() -> {
+					// Updates the tabbed property sheets title (no other API available)
+					tabbedPropertySheetPage.labelProviderChanged(null);
+				});
 			}
+			// System.out.println(msg.getEventType() + " @ " + msg.getNotifier());
 		}
 
 		/** Removes itself. */