Я пытаюсь добавить горизонтальную линию в линейную диаграмму в JavaFX.Нашел этот пост в SO и теперь пытаюсь изменить его, чтобы он работал в моем случае, однако я получаю сообщение об ошибке, и, надеюсь, кто-то может увидеть, в чем проблема здесь.
Воткод контроллера:
package gems.view;
public class GUImainController implements Initializable, Observer
{
final CategoryAxis xAxis = new CategoryAxis();
final NumberAxis yAxis = new NumberAxis();
private ArrayList<Float> tempArr = new ArrayList<>();
private ArrayList<String> tempTimeArray = new ArrayList<>();
private Series<String, Number> tempChart = new Series<>();
@FXML
private LineChartWithMarker<String, Number> lcTemperature = new LineChartWithMarker<>(xAxis,yAxis);
@Override
public void initialize(URL arg0, ResourceBundle arg1)
{
yAxis.setPrefWidth(35);
xAxis.setLabel("Temperature \\u00b0");
yAxis.setLabel("Time");
tempChart = new XYChart.Series<String, Number>();
lcTemperature.getData().add(tempChart);
tempArr.add(observable.getLatestMeasurementsFromServer().getTemperature());
tempTimeArray.add(observable.getLatestMeasurementsFromServer().getDateTime().getTime());
for (int i = 0; i < tempArr.size(); i++)
{
tempChart.getData().add(new XYChart.Data<>(tempTimeArray.get(i), tempArr.get(i)));
}
tempChart.getNode().lookup(".chart-series-line").setStyle("-fx-stroke: orange;");
String s = "test";
Data<String, Number> verticalMarker = new Data<>(s, 20);
lcTemperature.addHorizontalValueMarker(verticalMarker);
}
Вот класс LineChartWithMarker:
package gems.view;
import java.util.Objects;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.shape.Line;
public class LineChartWithMarker<X,Y> extends LineChart
{
private ObservableList<Data<X, Y>> horizontalMarkers;
public LineChartWithMarker(CategoryAxis xAxis, NumberAxis yAxis)
{
super(xAxis, yAxis);
horizontalMarkers = FXCollections.observableArrayList(data -> new Observable[] {data.YValueProperty()});
horizontalMarkers.addListener((InvalidationListener)observable -> layoutPlotChildren());
}
public void addHorizontalValueMarker(Data<X, Y> marker)
{
Objects.requireNonNull(marker, "the marker must not be null");
if (horizontalMarkers.contains(marker)) return;
Line line = new Line();
marker.setNode(line );
getPlotChildren().add(line);
horizontalMarkers.add(marker);
}
public void removeHorizontalValueMarker(Data<X, Y> marker) {
Objects.requireNonNull(marker, "the marker must not be null");
if (marker.getNode() != null) {
getPlotChildren().remove(marker.getNode());
marker.setNode(null);
}
horizontalMarkers.remove(marker);
}
@Override
protected void layoutPlotChildren() {
super.layoutPlotChildren();
for (Data<X, Y> horizontalMarker : horizontalMarkers) {
Line line = (Line) horizontalMarker.getNode();
line.setStartX(0);
line.setEndX(getBoundsInLocal().getWidth());
line.setStartY(getYAxis().getDisplayPosition(horizontalMarker.getYValue()) + 0.5); // 0.5 for crispness
line.setEndY(line.getStartY());
line.toFront();
}
}
}
А вот FXML (только часть для линейного графика):
<LineChart fx:id="lcTemperature" minWidth="100.0" prefHeight="155.0" prefWidth="708.0" BorderPane.alignment="CENTER">
<xAxis>
<CategoryAxis side="BOTTOM" />
</xAxis>
<yAxis>
<NumberAxis autoRanging="false" lowerBound="20.0" minorTickCount="10" minorTickLength="10.0" side="LEFT" tickLabelGap="10.0" tickLength="20.0" tickUnit="1.0" upperBound="30.0" />
</yAxis>
</LineChart>
Вот стек ошибок:
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
at java.lang.Thread.run(Unknown Source)
Caused by: javafx.fxml.LoadException:
/C:/My%20Projects/GEMS_SEP2/GEMS_SEP2/bin/FXML/GUIgems.fxml:42
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at gems.view.GUIuserClient.start(GUIuserClient.java:33)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
... 1 more
Caused by: java.lang.IllegalArgumentException: Can not set gems.view.LineChartWithMarker field gems.view.GUImainController.lcTemperature to javafx.scene.chart.LineChart
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
at sun.reflect.UnsafeObjectFieldAccessorImpl.set(Unknown Source)
at java.lang.reflect.Field.set(Unknown Source)
at javafx.fxml.FXMLLoader.injectFields(FXMLLoader.java:1163)
at javafx.fxml.FXMLLoader.access$1600(FXMLLoader.java:103)
at javafx.fxml.FXMLLoader$ValueElement.processValue(FXMLLoader.java:857)
at javafx.fxml.FXMLLoader$ValueElement.processEndElement(FXMLLoader.java:765)
at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2823)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2532)
... 12 more
Exception running application gems.view.GUIuserClient
Кстати, GUIgems.fxml: 42 - последняя строка кода FXML, который я выложил выше.
Кроме того, возможно, стоит упомянутьчто линейная диаграмма работает нормально, если я использую простой LineChart, например:
@FXML
private LineChart<String, Number> lcTemperature;
Он не работает, когда я пишу так:
@FXML
private LineChartWithMarker<String, Number> lcTemperature = new LineChartWithMarker<>(xAxis,yAxis);