public boolean requireUpdate() {
if (graph == null) {
// Try to get a graph
GraphModel graphModel = controller.getModel();
if (graphModel != null) {
graph = graphModel.getHierarchicalGraphVisible();
}
}
// Refresh reader if sight changed
Graph g = graph;
if (g != null) {
if (g.getGraphModel().getVisibleView().getViewId() != graphView) {
reset();
}
return g.getNodeVersion() > nodeVersion || g.getEdgeVersion() > edgeVersion;
}
return false;
}
