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  1. JDK
  2. JDK-8094595

[BarChart] BarChart wrong data displayed

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Cannot Reproduce
    • Affects Version/s: 8u25
    • Fix Version/s: 8u40
    • Component/s: javafx
    • Labels:
    • Environment:

      Windows 7

      Description

      I'm using BarChart and I've a very strange problem. First time I display data they are displayed correclty in the chart, but next times the reference axes moves.

      Thi is a test case to reproduce the problem:

      FXML:
          <?xml version="1.0" encoding="UTF-8"?>
            
          <?import java.lang.*?>
          <?import javafx.scene.chart.*?>
          <?import javafx.scene.layout.*?>
          <?import javafx.scene.layout.AnchorPane?>
            
          <AnchorPane xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.chart.Chart">
             <children>
                <BarChart fx:id="chart">
                  <xAxis>
                    <CategoryAxis side="BOTTOM" />
                  </xAxis>
                  <yAxis>
                    <NumberAxis side="LEFT" />
                  </yAxis>
                </BarChart>
             </children>
          </AnchorPane>



      Chart.java
          package application.chart;
            
          import java.net.URL;
          import java.util.ArrayList;
          import java.util.List;
          import java.util.ResourceBundle;
            
          import javafx.application.Application;
          import javafx.application.Platform;
          import javafx.beans.property.ObjectProperty;
          import javafx.beans.property.SimpleObjectProperty;
          import javafx.collections.FXCollections;
          import javafx.collections.ObservableList;
          import javafx.concurrent.Task;
          import javafx.fxml.FXML;
          import javafx.fxml.FXMLLoader;
          import javafx.fxml.Initializable;
          import javafx.scene.Parent;
          import javafx.scene.Scene;
          import javafx.scene.chart.BarChart;
          import javafx.scene.chart.XYChart;
          import javafx.scene.chart.XYChart.Data;
          import javafx.scene.chart.XYChart.Series;
          import javafx.stage.Stage;
            
          public class Chart extends Application implements Initializable {
            
              @FXML
              private BarChart<String, Integer> chart;
            
              private ObjectProperty<ObservableList<Series<String, Integer>>> seriesProperty = new SimpleObjectProperty<ObservableList<Series<String, Integer>>>();
            
              public static void main(String[] args) {
                  Application.launch(Chart.class, args);
            
              }
            
              @Override
              public void start(Stage primaryStage) throws Exception {
                  primaryStage.setTitle("Hello World!");
                  Parent root = FXMLLoader.load(getClass().getResource("Chart.fxml"));
                  primaryStage.setScene(new Scene(root, 700, 500));
                  primaryStage.show();
              }
            
              @Override
              public void initialize(URL location, ResourceBundle resources) {
                  chart.dataProperty().bind(seriesProperty);
                  loadRemoteData();
              }
            
              private void loadRemoteData() {
                  Task<Void> task = new Task<Void>() {
                      @Override
                      protected Void call() throws Exception {
                          System.out.println("Attesa....");
                          Thread.sleep(1500);
                          Series<String, Integer> serie = new Series<String, Integer>();
                          List<Data<String, Integer>> valori = new ArrayList<>();
                          Data<String, Integer> data1 = null, data2 = null, data3 = null;
            
                          data1 = new XYChart.Data<String, Integer>("Column1", 1);
                          data2 = new XYChart.Data<String, Integer>("Column2", 5);
                          data3 = new XYChart.Data<String, Integer>("Column3", 0);
            
                          valori.add(data1);
                          valori.add(data2);
                          valori.add(data3);
                          serie.setData(FXCollections.observableArrayList(valori));
            
                          final List<Series<String, Integer>> lista = new ArrayList<Series<String, Integer>>();
                          lista.add(serie);
            
                          // Aggiorno la proprietà su cui il grafico esegue il binding
                          Platform.runLater(() -> seriesProperty.set(FXCollections.observableArrayList(lista)));
                          
                          
                          System.out.println("Attesa....");
                          Thread.sleep(1500);
                          serie = new Series<String, Integer>();
                          valori = new ArrayList<>();
            
                          data1 = new XYChart.Data<String, Integer>("Column1", 0);
                          data2 = new XYChart.Data<String, Integer>("Column2", 0);
                          data3 = new XYChart.Data<String, Integer>("Column3", 0);
            
                          valori.add(data1);
                          valori.add(data2);
                          valori.add(data3);
                          serie.setData(FXCollections.observableArrayList(valori));
            
                          lista.clear();
                          lista.add(serie);
            
                          // Aggiorno la proprietà su cui il grafico esegue il binding
                          Platform.runLater(() -> seriesProperty.set(FXCollections.observableArrayList(lista)));
                          
                          
                          System.out.println("Attesa....");
                          Thread.sleep(1500);
                          serie = new Series<String, Integer>();
                          valori = new ArrayList<>();
            
                          data1 = new XYChart.Data<String, Integer>("Column1", 1);
                          data2 = new XYChart.Data<String, Integer>("Column2", 1);
                          data3 = new XYChart.Data<String, Integer>("Column3", 1);
            
                          valori.add(data1);
                          valori.add(data2);
                          valori.add(data3);
                          serie.setData(FXCollections.observableArrayList(valori));
            
                          lista.clear();
                          lista.add(serie);
            
                          // Aggiorno la proprietà su cui il grafico esegue il binding
                          Platform.runLater(() -> seriesProperty.set(FXCollections.observableArrayList(lista)));
                          return null;
                      }
                  };
                  new Thread(task).start();
              }
          }


      When you run the example youll see 3 refresh of the chat: first time are displayed values 1,5,0, then 0,0,0 and then should be displayed 1,1,1 but as you can see in the image you'll see 0.9,0.9,0.9.

      http://snag.gy/XG0A6.jpg

      Is this a bug?

      Thanks

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            • Assignee:
              jgiles Jonathan Giles
              Reporter:
              danielejfx Daniele (Inactive)
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              • Created:
                Updated:
                Resolved:
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