/** Displays the appropriate UI for the current model state. */
void displayElementSymbol() {
CoreArgCheck.isNotNull(viewer);
StructuredSelection selection = StructuredSelection.EMPTY;
if (model.getElementSymbol() != null) {
strategy.setTreeViewer(viewer); // make sure this viewer is set before using strategy
Object node = strategy.getNode(model.getElementSymbol());
if (node != null) {
selection = new StructuredSelection(node);
}
if (!selection.equals(viewer.getSelection())) {
viewer.setSelection(selection);
}
}
}
