added a check in the function "updating" to see if the constraint is being updated.

refs 3329

org.fortiss.tooling.kernel.ui/trunk/src/org/fortiss/tooling/kernel/ui/internal/.ratings

 ActionService.java bba3d40df33a07a9d30bc6b5945a9087940af057 GREEN
 AllocationEditPartFactoryService.java 8d176411639e01c15a65650747ec231ed7281777 GREEN
 ConstraintLabelDecorator.java 6dd2665a86800777cc7c17807fddb68dadf73df5 GREEN
-ConstraintUIService.java dde08f7c2c19e948e397bb9cd3242d4735226ca2 GREEN
+ConstraintUIService.java 00814f0cf3963e40b25ab550c31404e9d023d709 YELLOW
 ContextMenuService.java f0168796a57fcebfb6124705c5a865516f0cb4c6 GREEN
 EditPartFactoryService.java e3bc1a44761a2f444441233c61a67fdf0cc3f59d GREEN
 MarkerService.java 04e3960acd4af5d1d41c2a4a2abd74a91441fe76 GREEN

org.fortiss.tooling.kernel.ui/trunk/src/org/fortiss/tooling/kernel/ui/internal/ConstraintUIService.java

@@ -390,8 +390,8 @@ public final class ConstraintUIService implements IConstraintUIService, IIntrosp
 		for(ConstraintInstance ci : cis) {
 			// No need to check if it turns out the status is already known from a previous
 			// activation.
-			if(!IConstraintService.getInstance().isUpToDate(ci) ||
-					ci.getStatus() instanceof OutdatedConstraintInstanceStatus) {
+			if(!IConstraintService.getInstance().isUpdating(ci) &&
+					(!IConstraintService.getInstance().isUpToDate(ci) || ci.getStatus() instanceof OutdatedConstraintInstanceStatus)) {
 				getConstraintUI(ci).onOutdate(ci);
 			}
 		}