Dynamic element text item can display information of parent element

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@5010 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/diagramcontext.cpp

@@ -74,6 +74,10 @@ bool DiagramContext::addValue(const QString &key, const QVariant &value, bool sh
 	return(false);
 }
 
+QVariant DiagramContext::value(const QString &key) const {
+	return m_content.value(key);
+}
+
 /**
 	Clear the content of this diagram context.
 */