OO-1593: allow D&D on assessment test node if only one test part

src/main/java/org/olat/ims/qti21/ui/editor/AssessmentTestComposerController.java

@@ -486,7 +486,8 @@ public class AssessmentTestComposerController extends MainLayoutBasicController
 				}
 				
 			} else if(droppedObject instanceof AssessmentSection
-					&& (targetObject instanceof AssessmentSection || targetObject instanceof TestPart)) {
+					&& (targetObject instanceof AssessmentSection || targetObject instanceof TestPart
+							|| (targetObject instanceof AssessmentTest && ((AssessmentTest)targetObject).getTestParts().size() == 1))) {
 				AssessmentSection droppedSection = (AssessmentSection)droppedObject;
 				if(droppedSection.getParentSection() != null) {
 					droppedSection.getParentSection().getSectionParts().remove(droppedSection);
@@ -499,6 +500,9 @@ public class AssessmentTestComposerController extends MainLayoutBasicController
 				} else if(targetObject instanceof TestPart) {
 					TestPart targetTestPart = (TestPart)targetObject;
 					targetTestPart.getAssessmentSections().add(droppedSection);
+				} else if(targetObject instanceof AssessmentTest) {
+					TestPart targetTestPart = ((AssessmentTest)targetObject).getTestParts().get(0);
+					targetTestPart.getAssessmentSections().add(droppedSection);
 				}
 			}
 		} else {

src/main/java/org/olat/ims/qti21/ui/editor/AssessmentTestEditorAndComposerTreeModel.java

@@ -144,7 +144,9 @@ public class AssessmentTestEditorAndComposerTreeModel extends GenericTreeModel i
 	public boolean isNodeDroppable(TreeNode node) {
 		if(node == null) return false;
 		Object uobject = node.getUserObject();
-		return uobject instanceof AssessmentSection || uobject instanceof TestPart || uobject instanceof AssessmentItemRef;
+		return uobject instanceof AssessmentSection || uobject instanceof TestPart
+				|| uobject instanceof AssessmentItemRef
+				|| (uobject instanceof AssessmentTest && ((AssessmentTest)uobject).getTestParts().size() == 1);
 	}
 
 	@Override

src/main/java/org/olat/ims/qti21/ui/editor/_i18n/LocalStrings_de.properties

@@ -88,7 +88,7 @@ form.testPart.navigationMode.linear=Linear
 form.testPart.navigationMode.nonlinear=Nicht linear
 form.unkown=Unbekannt
 item.session.control.allow.comment=Kommentar erlauben
-item.session.control.allow.review=Review erlauben
+item.session.control.allow.review=R\u00FCckblick erlauben
 item.session.control.attempts=Versuch
 item.session.control.show.solution=L\u00F6sung anzeigen
 max.score=Maximal erreichbare Punktzahl