import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Scene;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.control.ScrollBar;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import java.util.ArrayList;
import java.util.List;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.control.Button;
import javafx.scene.layout.HBox;

/**
 * Author: Andriy Yatsynych
 * Date: 10/10/12
 * Time: 12:39 AM
 */
public class Bug extends Application {
    private XYChart.Series series;
    private final List<XYChart.Data> dataList = new ArrayList<XYChart.Data>(6);

    @Override
    public void start(Stage stage) throws Exception {
        String ver = com.sun.javafx.runtime.VersionInfo.getRuntimeVersion();
        System.out.println("javafx.runtime.version: " + ver);
        
        stage.setTitle("Scrollable Chart");

        //defining the axes
        final CategoryAxis xAxis = new CategoryAxis();
        xAxis.setAutoRanging(false); // Comment out this line to avoid NPE

        final NumberAxis yAxis = new NumberAxis();

        final LineChart<String, Number> lineChart = new LineChart<String, Number>(xAxis, yAxis);
        series = new XYChart.Series();

        dataList.add(new XYChart.Data("one", 5));
        dataList.add(new XYChart.Data("two", 12));
        dataList.add(new XYChart.Data("three", 6));
        dataList.add(new XYChart.Data("four", 19));
        dataList.add(new XYChart.Data("five", 1));
        dataList.add(new XYChart.Data("six", 7));

        //Pre-filled test data, displaying everything except one (last) element
        series.getData().addAll(dataList.subList(0, 5));

        lineChart.getData().add(series);

        final VBox vb = new VBox();

        vb.getChildren().add(lineChart);
        VBox.setVgrow(lineChart, Priority.ALWAYS);
        
        Button add = new Button("Right");
        add.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                series.getData().remove(0);
                XYChart.Data dataItem = new XYChart.Data(dataList.get(5).getXValue(), dataList.get(5).getYValue());
                series.getData().add(dataItem);
            }
        });
        
        Button left = new Button("Left");
        left.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                series.getData().remove(4);
                XYChart.Data dataItem = new XYChart.Data(dataList.get(0).getXValue(), dataList.get(0).getYValue());
                xAxis.getCategories().add(0, (String) dataItem.getXValue());
                series.getData().add(0, dataItem);
            }
        });
        
        HBox hBox = new HBox();
        hBox.getChildren().addAll(add, left);
        vb.getChildren().add(hBox);

        Scene scene = new Scene(vb, 800, 600);

        stage.setScene(scene);
        stage.show();
    }

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