涂改数据不断推startingposition了

Question

我与StackedBarCharts甲骨文例子玩弄从https://docs.oracle.com/javafx/2/charts/bar-chart.htm

当我开始我的程序一切正常 ，但每当我删除值和替换它们的新酒吧从零开始，如 。

对此行为很好奇我在网上查找了解决方案，并且遇到了Java-Buddy的另一个示例代码。他的示例代码有TextEdits，你可以在其中更改图表的值，改变这些值给我相同的“错误”（例如酒吧从120到200而不是从0到80，尽管在他的视频中显示了它如何工作，到相同的问题）。

如果任何人能够向我解释我做错了什么，将不胜感激。

下面是我现在正在处理的代码（它还有其他一些问题）。

import java.util.Arrays; 
import javafx.application.Application; 
import javafx.collections.FXCollections; 
import javafx.event.EventHandler; 
import javafx.scene.Scene; 
import javafx.scene.chart.CategoryAxis; 
import javafx.scene.chart.NumberAxis; 
import javafx.scene.chart.StackedBarChart; 
import javafx.scene.chart.XYChart; 
import javafx.scene.input.MouseEvent; 
import javafx.scene.layout.Region; 
import javafx.scene.layout.StackPane; 
import javafx.stage.Stage; 

public class TablesAndStuff extends Application { 
    Scene scene; 
    final CategoryAxis xAxis = new CategoryAxis(); 
    final NumberAxis yAxis = new NumberAxis(); 
    StackedBarChart<String, Number> sbc = new StackedBarChart<String, Number>(xAxis, yAxis); 
final XYChart.Series<String, Number> series1 = new XYChart.Series<String, Number>(); 
final XYChart.Series<String, Number> series2 = new XYChart.Series<String, Number>(); 
final XYChart.Series<String, Number> series3 = new XYChart.Series<String, Number>(); 
final XYChart.Series<String, Number> series4 = new XYChart.Series<String, Number>(); 
final XYChart.Series<String, Number> series5 = new XYChart.Series<String, Number>(); 
final XYChart.Series<String, Number> series6 = new XYChart.Series<String, Number>(); 
final XYChart.Series<String, Number> series7 = new XYChart.Series<String, Number>(); 

int[] leagues = new int[7]; 
int[] A = new int[] { 207, 1958, 7293, 11484, 17234, 20851, 13508 }; 
int[] B = new int[] { 283, 2189, 9392, 14959, 20821, 21125, 10148 }; 
int[] C = new int[] { 222, 1484, 5524, 9658, 17552, 25750, 16375 }; 

@Override 
public void start(Stage stage) { 
    setUpLeagues(); 
    stage.setTitle("Stacked Bars"); 
    sbc.setTitle("Country Summary"); 
    xAxis.setLabel("Country"); 
    xAxis.setCategories(FXCollections.<String> observableArrayList(Arrays.asList("A", "B", "C"))); 

    yAxis.setLabel("Value"); 
    series1.setName("1"); 

    series1.getData().add(new XYChart.Data<String, Number>("A", A[0])); 
    series1.getData().add(new XYChart.Data<String, Number>("B", B[0])); 
    series1.getData().add(new XYChart.Data<String, Number>("C", C[0])); 

    series2.setName("2"); 
    series2.getData().add(new XYChart.Data<String, Number>("A", 1985)); 
    series2.getData().add(new XYChart.Data<String, Number>("B", 2189)); 
    series2.getData().add(new XYChart.Data<String, Number>("C", 1484)); 

    series3.setName("3"); 
    series3.getData().add(new XYChart.Data<String, Number>("A", 7293)); 
    series3.getData().add(new XYChart.Data<String, Number>("B", 9392)); 
    series3.getData().add(new XYChart.Data<String, Number>("C", 5524)); 

    series4.setName("4"); 
    series4.getData().add(new XYChart.Data<String, Number>("A", 11484)); 
    series4.getData().add(new XYChart.Data<String, Number>("B", 14959)); 
    series4.getData().add(new XYChart.Data<String, Number>("C", 9658)); 

    series5.setName("5"); 
    series5.getData().add(new XYChart.Data<String, Number>("A", 17234)); 
    series5.getData().add(new XYChart.Data<String, Number>("B", 20821)); 
    series5.getData().add(new XYChart.Data<String, Number>("C", 17552)); 

    series6.setName("6"); 
    series6.getData().add(new XYChart.Data<String, Number>("A", 20851)); 
    series6.getData().add(new XYChart.Data<String, Number>("B", 21125)); 
    series6.getData().add(new XYChart.Data<String, Number>("C", 25750)); 

    series7.setName("7"); 
    series7.getData().add(new XYChart.Data<String, Number>("A", 13508)); 
    series7.getData().add(new XYChart.Data<String, Number>("B", 10148)); 
    series7.getData().add(new XYChart.Data<String, Number>("C", 16375)); 

    StackPane root = new StackPane(); 
    root.getChildren().add(sbc); 
    // root.getChildren().add(btn); 
    // StackPane.setAlignment(btn, Pos.BOTTOM_CENTER); 
    scene = new Scene(root, 800, 600); 

    sbc.getData().addAll(series1, series2, series3, series4, series5, series6, series7); 
    sbc.setOnMousePressed(new EventHandler<MouseEvent>() { 

     @Override 
     public void handle(MouseEvent arg0) { 
      /* 
      * Todo: Figure out a better way of detecting mouseclicks. 
      * (Adding handler directly to series does not seem to work, 
      * name of series clicked shows up in the targets toString but have not 
      * yet found a direct property for it 
      * 
      */ 
      if (arg0.getTarget().getClass().equals(Region.class)) { 
       Region r = (Region) arg0.getTarget(); 
       if (r.toString().contains("series1")) { 
        changeScene(stage, 1); 
       } 
       if (r.toString().contains("series2")) { 
        changeScene(stage, 2); 
       } 
      } 
     } 
    }); 
    stage.setScene(scene); 
    stage.show(); 
} 
//Tried clearing and readding data in several different ways, still need 
private void changeScene(Stage stage, int i) { 
    // stage.setScene(new Scene(new StackedBarChart<String, Number>(xAxis, 
    // yAxis))); 
    series1.getData().clear(); 
    series2.getData().clear(); 
    series3.getData().clear(); 
    series4.getData().clear(); 
    series5.getData().clear(); 
    series6.getData().clear(); 
    series7.getData().clear(); 
    // sbc.getChildrenUnmodifiable(); 
    series1.getData().add(new XYChart.Data<String, Number>("A", 200)); 
    series1.getData().add(new XYChart.Data<String, Number>("B", 250)); 
    series1.getData().add(new XYChart.Data<String, Number>("C", 225)); 

    // Clearing SBC then re-adding any series results in 
    // java.lang.IllegalArgumentException: Duplicate series added 
    // sbc.getData().clear(); 
    // sbc.getData().add(series1); 
    // sbc.getData().add(series2); 

} 

private void setUpLeagues() { 
    leagues[0] = 736; 
    leagues[1] = 6056; 
    leagues[2] = 24370; 
    leagues[3] = 40666; 
    leagues[4] = 63922; 
    leagues[5] = 77155; 
    leagues[6] = 44946; 
} 

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

Answer 1

再次使用sbc.setData（）将其设置为仅用于要显示的系列并重新同步系列集合。

例如。

private void changeScene(Stage stage, int i) { 
    series1.setData(FXCollections.observableArrayList(
     new XYChart.Data<String, Number>("A", 200), 
     new XYChart.Data<String, Number>("B", 250), 
     new XYChart.Data<String, Number>("C", 225))); 
    sbc.setData(FXCollections.singletonObservableList(series1)); 
}