[PieChart] label's line length can confuse slider, when values are big.

You may see on the attached movie.

You may use this application:


import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.chart.PieChart;
import javafx.scene.control.*;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class JavaCharts extends Application {

    public static void main(String[] args) {
        launch(args);
    }
    PieChart testedPieChart = new PieChart();
    VBox vb = new VBox();

    @Override
    public void start(Stage stage) throws Exception {

        ObservableList<PieChart.Data> data = FXCollections.<PieChart.Data>observableArrayList();
        for (int i = 0; i < 10; i++) {
            data.add(new PieChart.Data("Data item " + i, i * 100));
        }
        testedPieChart.setData(data);

        testedPieChart.setTitle("PieChart");
        testedPieChart.setStyle("-fx-border-color: darkgray;");
        testedPieChart.setPrefSize(600, 600);

        Pane pane = new Pane();
        pane.getChildren().add(testedPieChart);

        vb.getChildren().addAll(pane);

        Slider slider = new Slider();
        slider.setMin(-1000);
        slider.setMax(1000);
        slider.setShowTickLabels(true);
        slider.setShowTickMarks(true);
        testedPieChart.labelLineLengthProperty().bindBidirectional(slider.valueProperty());
        vb.getChildren().add(slider);

        pane.setPrefSize(600, 600);

        Scene scene = new Scene(vb, 700, 700);
        stage.setScene(scene);
        stage.show();
    }
}

You can move slider's knob to reproduce issue.