即使在轴上进行自动调整，我仍可以保留整数刻度线吗？ [英] Can I keep integral tick marks even with autoranging on an Axis?

问题描述

我从这里窃取了一些代码有一个 AreaChart 带有smooth lines，我在我的FXML中使用它的工作原理：

 < SmoothedAreaChart fx：id =chartlegendVisible =false
 title =tree depth by lineanimated =false> 
< xAxis> 
< NumberAxis fx：id =xAxistickUnit =1.0autoRanging =false
 minorTickVisible =falseforceZeroInRange =false
 label =Line number/> ; 
< / xAxis> 
< yAxis> 
< NumberAxis fx：id =yAxisminorTickVisible =false
 tickUnit =1.0forceZeroInRange =truelabel =Tree depth/> 
< / yAxis> 
< / SmoothedAreaChart> 
  

但我的问题是Y轴。

我将 tickUnit 设置为 1.0 ，因为我想要整数单位， t quite work：

>

如果在 yAxis 的定义中设置 autoRanging 到 false ，然后图形被裁剪（当我填充图形时，我手动设置上限）：

基本上，我喜欢两者的行为：

• 
  

  有可能做这个，或者我需要编写自己的/找到一个 Axis 的实现？

  解决方案

  在这里你可以看到只是几行格式的数字，但你想要的。 （SO主人要求解释）

    import javafx.application.Application; 
   import javafx.scene.Scene; 
   import javafx.scene.chart.LineChart; 
   import javafx.scene.chart.NumberAxis; 
   import javafx.scene.chart.XYChart; 
   import javafx.scene.control.Button; 
   import javafx.scene.layout.HBox; 
   import javafx.scene.layout.VBox; 
   import javafx.stage.Stage; 
   import javafx.util.StringConverter; 
   
   public class AxisFormatter extends Application {
   final NumberAxis xAxis = new NumberAxis（）; 
   final NumberAxis yAxis = new NumberAxis（）; 
   final LineChart< Number，Number> chart = new LineChart<>（xAxis，yAxis）; 
   double i = 0d; 
   
   final StringConverter< Number> convert = new StringConverter< Number>（）{
   @Override public String toString（Number object）{
   //对于isInteger 
  是一个未经测试的想法return object.doubleValue intValue（）
  ？ object.intValue（）+
  ：; 
  } 
   @Override public Number fromString（String string）{return 0;} 
  }; 
   
   @Override public void start（Stage primaryStage）{
   
   chart.getData（）。add（new XYChart.Series<>（））; 
   
   while（i ++ <10d）
   chart.getData（）。get（0）.getData（）。add（new XYChart.Data<>（i，i / 2） ）; 
   
   Button btn1 = new Button（increase max y value）; 
   btn1.setOnAction（（evt） - > {
   chart.getData（）。get（0）.getData（）。add（new XYChart.Data& ）; 
  }）; 
   
   Button btn2 = new Button（change formatter）; 
   btn2.setOnAction（（evt） - > {
   yAxis.setTickLabelFormatter（yAxis.getTickLabelFormatter（）== converter 
  ？null：converter）; 
  }）; 
   
   yAxis.setTickLabelFormatter（converter）; 
   
   VBox root = new VBox（chart，new HBox（5，btn1，btn2））; 
  场景scene = new Scene（root）; 
   primaryStage.setScene（scene）; 
   primaryStage.show（）; 
  } 
   
   public static void main（String [] args）{
   launch（args）; 
  } 
   
  } 
    

  
  

  I "stole" some code from here to have an AreaChart with "smooth lines" which I use in my FXML and it works:

      <SmoothedAreaChart fx:id="chart" legendVisible="false"
          title="Tree depth by line" animated="false">
          <xAxis>
              <NumberAxis fx:id="xAxis" tickUnit="1.0" autoRanging="false"
                  minorTickVisible="false" forceZeroInRange="false"
                  label="Line number"/>
          </xAxis>
          <yAxis>
              <NumberAxis fx:id="yAxis" minorTickVisible="false"
                  tickUnit="1.0" forceZeroInRange="true" label="Tree depth"/>
          </yAxis>
      </SmoothedAreaChart>
  

  The problem I have however is with the Y axis.

  I set the tickUnit to 1.0 because I want, well, integral units, but it doesn't quite work:

  If, in the definition of yAxis, I set autoRanging to false then the graph is cropped (I set the upper bound by hand when I fill the graph):

  And, well, there are too many tick marks as well.

  Basically, I'd like the behavior of both:

  • that the autoranging takes place,
  • but that the tick marks always be integral numbers.

  Is there a possibility to do this, or do I need to code my own/find an implementation of Axis which does that?

  解决方案

  Here you can see just a few lines to format the numbers however you want. (SO overlords asked for an explanation)

  import javafx.application.Application;
  import javafx.scene.Scene;
  import javafx.scene.chart.LineChart;
  import javafx.scene.chart.NumberAxis;
  import javafx.scene.chart.XYChart;
  import javafx.scene.control.Button;
  import javafx.scene.layout.HBox;
  import javafx.scene.layout.VBox;
  import javafx.stage.Stage;
  import javafx.util.StringConverter;
  
  public class AxisFormatter extends Application {
      final NumberAxis xAxis = new NumberAxis();
      final NumberAxis yAxis = new NumberAxis();
      final LineChart<Number, Number> chart = new LineChart<>(xAxis, yAxis);
      double i = 0d;
  
      final StringConverter<Number> converter =  new StringConverter<Number>() {
          @Override public String toString(Number object) {
              //just an untested idea for isInteger
              return object.doubleValue() == object.intValue() 
                      ? object.intValue()+""
                      :"";
          }
          @Override public Number fromString(String string) { return 0;}
      };
  
      @Override public void start(Stage primaryStage) {
  
          chart.getData().add(new XYChart.Series<>());
  
          while (i++ < 10d)
              chart.getData().get(0).getData().add(new XYChart.Data<>(i,i/2));
  
          Button btn1 = new Button("increase max y value");
          btn1.setOnAction((evt)->{
              chart.getData().get(0).getData().add(new XYChart.Data<>(i++,i/2));
          });
  
          Button btn2 = new Button("change formatter");
          btn2.setOnAction((evt)->{
              yAxis.setTickLabelFormatter(yAxis.getTickLabelFormatter() == converter
                  ? null : converter);
          });
  
          yAxis.setTickLabelFormatter(converter);
  
          VBox root = new VBox(chart, new HBox(5,btn1,btn2));
          Scene scene = new Scene(root);
          primaryStage.setScene(scene);
          primaryStage.show();
      }
  
      public static void main(String[] args) {
          launch(args);
      }
  
  }
  

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