/** @param move For add: if true, remove from all previous groups */
private AbstractAction getAction(
GroupTreeNode node, BibtexEntry[] selection, boolean add, boolean move) {
AbstractAction action =
add ? new AddToGroupAction(node, move, panel) : new RemoveFromGroupAction(node, panel);
AbstractGroup group = node.getGroup();
if (!move) {
action.setEnabled(
add
? group.supportsAdd() && !group.containsAll(selection)
: group.supportsRemove() && group.containsAny(selection));
} else {
action.setEnabled(group.supportsAdd());
}
return action;
}
