NamespacesTable namespacesTable = new NamespacesTable(splitPane);
splitPane.setWeights(new int[] { 6, 4 });
resultTab.setControl(splitPane);
// add the evaluation trigger listener
SelectionListener evaluationTrigger = new EvaluationTrigger(query, namespacesTable, prettyPrint, result);
query.addSelectionListener(evaluationTrigger);
execute.addSelectionListener(evaluationTrigger);
// add namespace loader listener
SelectionListener namespaceLoaderListener = new NamespaceLoadTrigger(query, namespacesTable);