App.java 文件源码

@FXML
private void openFolder() {
    if (catalog.get().isIndexing()) {
        Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
        alert.setTitle("Confirmation");
        alert.setHeaderText("Indexing in progress");
        alert.setContentText("Opening a new folder will cancel indexing. Continue?");
        Optional<ButtonType> result = alert.showAndWait();
        // escape on cancel/close
        if (!result.isPresent() || result.get() != ButtonType.OK) {
            return;
        }
    }
    DirectoryChooser directoryChooser = new DirectoryChooser();
    File dir = directoryChooser.showDialog(stage);
    if (dir != null) {
        if (catalog.get() != null) {
            catalog.get().close();
        }
        catalog.set(new Catalog(dir));
    }  // do nothing on cancel
}