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| package DataTraitment;
import javafx.beans.binding.Bindings;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.ReadOnlyObjectProperty;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.value.ObservableObjectValue;
import javafx.geometry.HPos;
import javafx.geometry.VPos;
import javafx.scene.chart.Axis;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Region;
import javafx.scene.shape.Line;
public class TrackLineChart<X extends Number, Y extends Number> extends LineChart<X,Y>{
private final Region userTrackArea = new Region();
private final Line lineUserTrackX = new Line();
private final Line lineUserTrackY = new Line();
private ObservableObjectValue<Double> userTrackXProperty;
private ObservableObjectValue<Double> userTrackYProperty;
@SuppressWarnings({ "rawtypes", "unchecked" })
public TrackLineChart(Axis xAxis, Axis yAxis) {
super(xAxis, yAxis);
userTrackXProperty().addListener(observable -> requestChartLayout());
userTrackYProperty().addListener(observable -> requestChartLayout());
userTrackArea.setId("userTrackArea");
userTrackArea.mouseTransparentProperty().bind(trackUserProperty().not());
userTrackArea.setOnMouseMoved(this::handleMouseTrackingMoved);
userTrackArea.setOnMouseExited(this::handleTrackingMouseExit);
userTrackArea.setOnMouseClicked(this::handleMouseTrackingClicked);
lineUserTrackX.setId("lineUserTrackX");
lineUserTrackX.visibleProperty().bind(trackUserProperty());
lineUserTrackY.setId("lineUserTrackY");
lineUserTrackY.visibleProperty().bind(trackUserProperty());
getPlotChildren().addAll(lineUserTrackX, lineUserTrackY, userTrackArea);
}
private void handleMouseTrackingMoved(final MouseEvent mouseEvent) {
final NumberAxis xAxis = (NumberAxis) getXAxis();
final NumberAxis yAxis = (NumberAxis) getYAxis();
final double mouseX = mouseEvent.getX();
final double mouseY = mouseEvent.getY();
final double valueX = xAxis.getValueForDisplay(mouseX).doubleValue();
final double valueY = yAxis.getValueForDisplay(mouseY).doubleValue();
// System.out.printf("Mouse %f %f -> value %f (%f %f) %f (%f %f)", mouseX, mouseY,
// valueX, xAxis.getLowerBound(), xAxis.getUpperBound(),
// valueY, yAxis.getLowerBound(), yAxis.getUpperBound()).println();
lineUserTrackX.visibleProperty().bind(trackUserProperty().and(Bindings.isNotNull(userTrackXProperty)));
lineUserTrackY.visibleProperty().bind(trackUserProperty().and(Bindings.isNotNull(userTrackYProperty)));
}
private void handleTrackingMouseExit(final MouseEvent mouseEvent) {
userTrackX.set(null);
userTrackY.set(null);
}
private void handleMouseTrackingClicked(final MouseEvent mouseEvent) {
final double mouseX = mouseEvent.getX();
final NumberAxis xAxis = (NumberAxis) getXAxis();
final double valueX = xAxis.getValueForDisplay(mouseX).doubleValue();
selectionX.set(valueX);
}
////////////////////////////////////////////////////////////////////////////
@Override
protected void layoutPlotChildren() {
super.layoutPlotChildren();
final NumberAxis xAxis = (NumberAxis) getXAxis();
final NumberAxis yAxis = (NumberAxis) getYAxis();
lineUserTrackX.toFront();
lineUserTrackY.toFront();
userTrackArea.toFront();
final Double userTrackXObj = getUserTrackX();
final double userTrackX = userTrackXObj == null ? 0 : userTrackXObj.doubleValue();
final Double userTrackYObj = getUserTrackY();
final double userTrackY = userTrackYObj == null ? 0 : userTrackYObj.doubleValue();
// System.out.printf("User %f %f", userTrackX, userTrackY).println();
final double x = xAxis.getDisplayPosition(userTrackX);
final double y = yAxis.getDisplayPosition(userTrackY);
final double x1 = xAxis.getDisplayPosition(xAxis.getLowerBound());
final double y1 = yAxis.getDisplayPosition(yAxis.getLowerBound());
final double x2 = xAxis.getDisplayPosition(xAxis.getUpperBound());
final double y2 = yAxis.getDisplayPosition(yAxis.getUpperBound());
//
final double screenOffset = 0.5;
//
layoutInArea(userTrackArea, x1, y2, x2 - x1, y1 - y2, 0, HPos.LEFT, VPos.TOP);
//
lineUserTrackX.setStartX(x + screenOffset);
lineUserTrackX.setStartY(y1 + screenOffset);
lineUserTrackX.setEndX(x + screenOffset);
lineUserTrackX.setEndY(y2 + screenOffset);
//
lineUserTrackY.setStartX(x1 + screenOffset);
lineUserTrackY.setStartY(y + screenOffset);
lineUserTrackY.setEndX(x2);
lineUserTrackY.setEndY(y);
}
////////////////////////////////////////////////////////////////////////////
private final BooleanProperty trackUser = new SimpleBooleanProperty(this, "trackUser", true);
public final boolean isTrackUser() {
return trackUser.get();
}
public final void setTrackUser(final boolean value) {
trackUser.set(value);
}
public final BooleanProperty trackUserProperty() {
return trackUser;
}
private final ReadOnlyObjectWrapper<Double> userTrackX = new ReadOnlyObjectWrapper<Double>(this, "userTrackX");
public final Double getUserTrackX() {
return userTrackX.get();
}
private ReadOnlyObjectProperty<Double> userTrackYProperty() {
return userTrackY.getReadOnlyProperty();
}
private final ReadOnlyObjectWrapper<Double> userTrackY = new ReadOnlyObjectWrapper<Double>(this, "userTrackY");
public final Double getUserTrackY() {
return userTrackY.get();
}
private ReadOnlyObjectProperty<Double> userTrackXProperty() {
return userTrackX.getReadOnlyProperty();
}
private final ReadOnlyObjectWrapper<Double> selectionX = new ReadOnlyObjectWrapper<Double>(this, "selectionXProperty");
public final Double getSelectionX() {
return selectionX.get();
}
public final ReadOnlyObjectProperty<Double> selectionXProperty() {
return selectionX.getReadOnlyProperty();
}
} |
Extraire les coordonnées d'un point sur un graphe LineChart
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suivez 
Effectivement, tu sembles avoir un soucis pour conceptualiser quand utiliser les propriétés... vu que tu avais enlevé la partie qui met à jour les valeurs des propriétés, les lignes ne pouvaient pas se dessiner.
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