--- ClassAttrbuteRow.java	2008-01-11 01:08:23.383510657 +0100
+++ ClassAttrbuteRow.java	2008-01-11 01:11:00.531143327 +0100
@@ -86,14 +86,41 @@
 	}
 	private void doOpenSelectionDialog() {
 		IResource resource = getPluginBase().getModel().getUnderlyingResource();
-		String type = PDEJavaHelperUI.selectType(
+		String type = selectType(
 				resource, 
 				IJavaElementSearchConstants.CONSIDER_CLASSES_AND_INTERFACES, 
-				text.getText());
+				text.getText(),
+				getBaseOnType()); // fetch 'basedOn' attribute (FIXME: how?)
 		if (type != null)
 			text.setText(type);
 
 	}
+	/* copied from PDEJavaHelperUI, added param superTypeName */
+	public static String selectType(IResource resource, int scope, String filter, String superTypeName) 
+	{
+		if (resource == null) return null;
+		IProject project = resource.getProject();
+		try {
+			// [SH] start modification: create new scope (hierarchy):
+			IJavaProject javaProject= JavaCore.create(project);
+			IType superType= javaProject.findType(superTypeName);
+			IJavaSearchScope searchScope= new HierarchyScope(superType, DefaultWorkingCopyOwner.PRIMARY);
+			// [SH] end modification
+			SelectionDialog dialog = JavaUI.createTypeDialog(
+					PDEPlugin.getActiveWorkbenchShell(),
+					PlatformUI.getWorkbench().getProgressService(),
+					searchScope, // [SH] this arg modified
+					scope, 
+			        false, filter); //$NON-NLS-1$
+			dialog.setTitle(PDEUIMessages.ClassAttributeRow_dialogTitle); 
+			if (dialog.open() == Window.OK) {
+				IType type = (IType) dialog.getResult()[0];
+				return type.getFullyQualifiedName('$');
+			}
+		} catch (JavaModelException e) {
+		}
+		return null;
+	}
 	private IPluginBase getPluginBase() {
 		IBaseModel model = part.getPage().getPDEEditor().getAggregateModel();
 		return ((IPluginModelBase) model).getPluginBase();