LineChart XY, how to remove?

Hi all

I have a series of simple trace on a XY chart as below
public class SimpleXYLineChart extends Application {
 
@Override
public void start(Stage stage) {        
   stage.setTitle("Line plot");       
 
   final CategoryAxis xAxis = new CategoryAxis();
   final NumberAxis yAxis = new NumberAxis(1, 22, 0.5);
 
   yAxis.setTickLabelFormatter(new NumberAxis.DefaultFormatter(yAxis){
        @Override
    public String toString(Number object){
        return String.format("%7.2f", object);
    }
});
    final LineChart<String, Number>lineChart = new LineChart<String, Number>(xAxis, yAxis);
 
    lineChart.setCreateSymbols(false);
    lineChart.setAlternativeRowFillVisible(false);
    lineChart.setLegendVisible(false);
    lineChart.setTitle("LineChart");
 
    XYChart.Series series1 = new XYChart.Series();
 
    series1.getData().add(new XYChart.Data("Jan", 1));
    series1.getData().add(new XYChart.Data("Feb", 1.5));
    series1.getData().add(new XYChart.Data("Mar", 2));
    series1.getData().add(new XYChart.Data("Apr", 2.5));
    series1.getData().add(new XYChart.Data("May", 3));
    series1.getData().add(new XYChart.Data("Jun", 4));
    series1.getData().add(new XYChart.Data("Jul", 6));
    series1.getData().add(new XYChart.Data("Aug", 9));
    series1.getData().add(new XYChart.Data("Sep", 12));
    series1.getData().add(new XYChart.Data("Oct", 15));
    series1.getData().add(new XYChart.Data("Nov", 20));
    series1.getData().add(new XYChart.Data("Dec", 22));
 
    lineChart.getData().addAll(series1);        
 
    Scene scene = new Scene(new Group(), 800, 600);
    final VBox vbox = new VBox();
    final HBox hbox = new HBox();
 
    final Button remove = new Button("Remove Series");
    remove.setOnAction(new EventHandler<ActionEvent>() {
        @Override public void handle(ActionEvent e) {
    if (!lineChart.getData().isEmpty()) 
        System.out.println("Remove Series");
        lineChart.getData().remove(/*(lineChart.getData().size()-1)*/0);
        }
    });                
 
    hbox.setSpacing(10);
    hbox.getChildren().addAll(remove);
 
    vbox.getChildren().addAll(lineChart, hbox);
    hbox.setPadding(new Insets(10, 10, 10, 50));
 
    ((Group)scene.getRoot()).getChildren().add(vbox);
    stage.setScene(scene);
    stage.show();
}
 
public static void main(String[] args) {
    launch(args);
}   
}
I would like to delete the line drawn by clicking on the "delete" button and have the empty stage.

I found this example of scatterplot

docs.Oracle.com/JavaFX/2/Charts/ScatterChartSample.java.html

and it works, I don't know why my example does not remove traced, while the point cloud doesn't work, when I click on the button Delete I NullPointerException

Any help really appreciated

Hello. Please remove the following line. Then you can update your chart.

  lineChart.setCreateSymbols(false);

This is a bug. Please take a look at http://javafx-jira.kenai.com/browse/RT-22124

Published by: shakir.gusaroff on August 24, 2012 08:18

Published by: shakir.gusaroff on August 24, 2012 08:31

Tags: Java

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