HBox failing to layout ChartViewer instances from JFreeChartFX

HBoxFail.java

import java.awt.Color;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.block.BlockBorder;
import org.jfree.chart.fx.ChartViewer;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;

import javafx.application.Application;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class HBoxFail extends Application {

	private static final int numberOfCharts = 3;
	private static final boolean useWorkaround = false;

	private Pane charts() {
		HBox parent = new HBox();
		for (int current = 0; current < numberOfCharts; current++) {
			ChartViewer viewer = createChart();
			Node container = useWorkaround(viewer);
			HBox.setHgrow(container, Priority.ALWAYS);
			parent.getChildren().add(container);
		}
		return parent;
	}

	private Node useWorkaround(ChartViewer viewer) {
		if (useWorkaround) {
			return new StackPane(viewer);
		}
		return viewer;
	}

	@Override
	public void start(Stage stage) throws Exception {
		Pane charts = charts();
		Scene value = new Scene(charts);
		stage.setScene(value);
		stage.setTitle("HBox fail");
		stage.setWidth(700);
		stage.setHeight(390);
		stage.show();
	}

	public static void main(String[] args) {
		launch(HBoxFail.class);
	}

	/**
	 * Taken from BarChartFXDemo1.java
	 * 
	 * @return
	 */
	private static ChartViewer createChart() {
		CategoryDataset dataset = createDataset();
		JFreeChart chart = ChartFactory.createBarChart("Performance: JFreeSVG vs Batik",
				null /* x-axis label */, "Milliseconds" /* y-axis label */, dataset);
		chart.addSubtitle(new TextTitle(
				"Time to generate 1000 charts in SVG " + "format (lower bars = better performance)"));
		chart.setBackgroundPaint(Color.white);
		CategoryPlot plot = (CategoryPlot) chart.getPlot();

		NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
		BarRenderer renderer = (BarRenderer) plot.getRenderer();
		renderer.setDrawBarOutline(false);
		chart.getLegend().setFrame(BlockBorder.NONE);
		return wrapInViewer(chart);
	}

	private static ChartViewer wrapInViewer(JFreeChart chart) {
		ChartViewer viewer = new ChartViewer(chart);
		viewer.setMaxHeight(Double.MAX_VALUE);
		viewer.setMaxWidth(Double.MAX_VALUE);
		return viewer;
	}

	/**
	 * Taken from BarChartFXDemo1.java
	 * 
	 * @return
	 */
	private static CategoryDataset createDataset() {
		DefaultCategoryDataset dataset = new DefaultCategoryDataset();
		dataset.addValue(7445, "JFreeSVG", "Warm-up");
		dataset.addValue(24448, "Batik", "Warm-up");
		dataset.addValue(4297, "JFreeSVG", "Test");
		dataset.addValue(21022, "Batik", "Test");
		return dataset;
	}

}