private void deleteGraphEdge(Edge edge) { // make sure we aren't deleting a null edge assert (edge != null); assert (edge.type == Edge.Type.GRAPH_EDGE); // deselect if necessary if (edge == selectedItem) selectEdge(null); queryGraph.removeEdge(edge.getQueryEdge()); graphEdges.remove(edge); // signal deletion fireEvent(edge, GRAPH_CHANGED); }