private void updateSelectedFiles() {
assertFxApplicationThread();
if (updatingSelectedFiles) return;
updatingSelectedFiles = true;
try {
final ObservableList<TreeItem<FileTreeItem<?>>> selectedItems =
treeTableView.getSelectionModel().getSelectedItems();
final Set<File> newSelectedFiles = new HashSet<File>(selectedItems.size());
for (final TreeItem<FileTreeItem<?>> selectedItem : selectedItems) {
final FileTreeItem<?> fileTreeItem =
selectedItem == null
? null
: selectedItem.getValue(); // strange but true: it can be null
if (fileTreeItem instanceof FileFileTreeItem)
newSelectedFiles.add(((FileFileTreeItem) fileTreeItem).getFile());
}
selectedFiles.retainAll(newSelectedFiles);
selectedFiles.addAll(newSelectedFiles);
} finally {
updatingSelectedFiles = false;
}
}
