/**
 * Create a basic text field for input and a refresh button.
 */
private void makeControls() {

    Label label1 = new Label("Placement:");
    textField = new TextField();
    textField.setPrefWidth(300);
    Button button = new Button("Refresh");
    button.setOnAction(e -> {
        makePlacement(textField.getText());
        textField.clear();
    });
    HBox hb = new HBox();
    hb.getChildren().addAll(label1, textField, button);
    hb.setSpacing(10);
    hb.setLayoutX(130);
    hb.setLayoutY(VIEWER_HEIGHT - 50);
    controls.getChildren().add(hb);

    button.setOnAction(event -> getImage());
}