JavaFX BarChart xAxis 标签定位错误

Question

我的窗口有以下控制器：

package window;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.chart.BarChart;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;

import java.util.Map;
import java.util.SortedMap;

public class StatisticsController {

    @FXML
    private BarChart<?, ?> barChartHistogram;

    private SortedMap<String, Integer> _points;

    @FXML
    private CategoryAxis xAxis;
    @FXML
    private NumberAxis yAxis;

    public void onLoad(SortedMap<String, Integer> points) {
        xAxis.setLabel("Numer indeksu");
        yAxis.setLabel("Ilo?? punktów");
        //barChartHistogram.setBarGap(0);
        XYChart.Series series1 = new XYChart.Series();
        int a = 10;
        series1.getData().add(new XYChart.Data("Tom", 10));
        series1.getData().add(new XYChart.Data("Andrew", 7));
        series1.getData().add(new XYChart.Data("Patrick", 5));


        /*for (Map.Entry<String, Integer> p: points.entrySet()) {
            series1.getData().add(new XYChart.Data<>(Integer.toString(a), p.getValue()));
            a += 10;
        }*/
        barChartHistogram.getData().addAll(series1);
        _points = points;
    }

}

.fxml此窗口的文件：

package window;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.chart.BarChart;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;

import java.util.Map;
import java.util.SortedMap;

public class StatisticsController {

    @FXML
    private BarChart<?, ?> barChartHistogram;

    private SortedMap<String, Integer> _points;

    @FXML
    private CategoryAxis xAxis;
    @FXML
    private NumberAxis yAxis;

    public void onLoad(SortedMap<String, Integer> points) {
        xAxis.setLabel("Numer indeksu");
        yAxis.setLabel("Ilo?? punktów");
        //barChartHistogram.setBarGap(0);
        XYChart.Series series1 = new XYChart.Series();
        int a = 10;
        series1.getData().add(new XYChart.Data("Tom", 10));
        series1.getData().add(new XYChart.Data("Andrew", 7));
        series1.getData().add(new XYChart.Data("Patrick", 5));


        /*for (Map.Entry<String, Integer> p: points.entrySet()) {
            series1.getData().add(new XYChart.Data<>(Integer.toString(a), p.getValue()));
            a += 10;
        }*/
        barChartHistogram.getData().addAll(series1);
        _points = points;
    }

}

除了一件事外，一切都完美无缺：

正如您所看到的，x 轴标签工作正常，但 x 轴标签（我的意思是像列名）应该是Tom，Andrew并且Patrick放置在完全相同的位置（通过这个混乱您可以实际读取Patrick）x 的 0 位置轴。问题出在哪儿？我应该对用户界面或其他东西进行一些更改吗？

Answer 1

我为此找到了另一种解决方法。简单设置xAxis.setAnimated(false)

Answer 2

这是自动范围的错误则CategoryAxis的，如果数据是动态设置的。

下面是一个（非 fxml）示例，它演示了一个粗略的问题：手动设置类别而不是让图表/轴找到它们。

public class BarChartBug extends Application {

    private NumberAxis yAxis;
    private CategoryAxis xAxis;
    private BarChart<String, Number> barChart;

    private Parent createContent() {
        xAxis = new CategoryAxis();
        yAxis = new NumberAxis();
        barChart = new BarChart<>(xAxis, yAxis);

        Button initData = new Button("init");
        initData.setOnAction(e -> {
            xAxis.setLabel("Numer indeksu");
            yAxis.setLabel("Ilo punktw");
            XYChart.Series<String, Number> series1 = new XYChart.Series<>();
            series1.getData().add(new XYChart.Data<String, Number>("Tom", 10));
            series1.getData().add(new XYChart.Data<String, Number>("Andrew", 7));
            series1.getData().add(new XYChart.Data<String, Number>("Patrick", 5));

            // hack-around:
            // xAxis.setCategories(FXCollections.observableArrayList("Tom", "Andrew", "Patrick"));
            barChart.getData().addAll(series1);

            initData.setDisable(true);

        });
        BorderPane pane = new BorderPane(barChart);
        pane.setBottom(initData);
        return pane;

    }

    @Override
    public void start(Stage stage) throws Exception {
        stage.setScene(new Scene(createContent()));
        stage.setTitle(FXUtils.version());
        stage.show();
    }

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

    @SuppressWarnings("unused")
    private static final Logger LOG = Logger
            .getLogger(BarChartBug.class.getName());

}