I try to create a label on click for my PieChart, but unfortunately my label is never visible.
I found a similar topic on StackOverFlow : Label not showing on mouse event JavaFx But my application is not as simple. I can't add my Label to the list of children because of my architecture.
(You can found a diagram here : https://i.sstatic.net/ZFJaR.png )
Here my code :
PieChartNode.java
package nodeStatsVision.chartFactory;
import java.util.ArrayList;
import javafx.application.Platform;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.chart.PieChart;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import nodeStatsVision.beans.ListRepere;
import nodeStatsVision.beans.OptionsChart;
import nodeStatsVision.beans.ValueStat;
/**
*
* @author Zombkey.
*/
public class PieChartNode implements ChartNode {
private ListRepere categories;
private ArrayList<ValueStat> values;
private ObservableList<PieChart.Data> pieChartData;
private Node node;
public PieChartNode(ListRepere categories, ArrayList<ValueStat> values){
this.categories = categories;
this.values = values;
pieChartData = FXCollections.observableArrayList();
node = new PieChart(pieChartData);
Platform.runLater(new Runnable() {
@Override
public void run() {
formatData();
}
});
}
private void formatData() {
final Label caption = new Label("");
caption.setTextFill(Color.DARKORANGE);
caption.setStyle("-fx-font: 24 arial;");
for(ValueStat v : values){
PieChart.Data dataTemp = new PieChart.Data(v.getCategorie().getStringName(),v.getDoubleValue());
pieChartData.add(dataTemp);
dataTemp.getNode().addEventHandler(MouseEvent.MOUSE_CLICKED,
new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent e) {
System.out.println("event : "+v.getCategorie().getStringName()+" : "+v.getDoubleValue());
caption.setTranslateX(e.getSceneX());
caption.setTranslateY(e.getSceneY());
caption.setText(String.valueOf(dataTemp.getPieValue()));
caption.setVisible(true);
System.out.println("label "+caption);
}
});
}
}
@Override
public Node getNodeGraph() {
return node;
}
@Override
public void setOptions(OptionsChart optionsChart) {
//To implemente
}
}
Have you a idea about, how add my Label to the scene ?
Thanks !
(Other question, Why the Node of PieChart.Data is on ReadOnly ?)
Zombkey.
PS : Sorry about my english, I'm a French student, I'm still learning :) Ps 2 : First time on StackOverflow, if I did mistake, tell me it !
Ok ! I found a solution for my case !
Semantically my Label is only for my PieChart. That's why I don't want had it to my SceneGraph.
My ChartFactory return a Node, then display it. So my node have to contain the PieChart AND the Label.
I create a Group with a StackPane. In the StackPane I add my PieChart and my Label. Then my factory return the Group as a Node.
Drop the code !
package nodeStatsVision.chartFactory;
import java.util.ArrayList;
import javafx.application.Platform;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.chart.PieChart;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import nodeStatsVision.beans.ListRepere;
import nodeStatsVision.beans.OptionsChart;
import nodeStatsVision.beans.ValueStat;
/**
*
* @author Zombkey.
*/
public class PieChartNode implements ChartNode {
private ListRepere categories;
private ArrayList<ValueStat> values;
private ObservableList<PieChart.Data> pieChartData;
private Group group;
private Node node;
private final Label caption;
public PieChartNode(ListRepere categories, ArrayList<ValueStat> values){
this.categories = categories;
this.values = values;
group = new Group();
StackPane pane = new StackPane();
group.getChildren().add(pane);
pieChartData = FXCollections.observableArrayList();
node = new PieChart(pieChartData);
pane.getChildren().add(node);
caption = new Label("");
caption.setVisible(false);
caption.getStyleClass().addAll("chart-line-symbol", "chart-series-line");
caption.setStyle("-fx-font-size: 12; -fx-font-weight: bold;");
caption.setMinSize(Label.USE_PREF_SIZE, Label.USE_PREF_SIZE);
pane.getChildren().add(caption);
Platform.runLater(new Runnable() {
@Override
public void run() {
formatData();
}
});
}
private void formatData() {
for(ValueStat v : values){
PieChart.Data dataTemp = new PieChart.Data(v.getCategorie().getStringName(),v.getDoubleValue());
pieChartData.add(dataTemp);
dataTemp.getNode().addEventHandler(MouseEvent.MOUSE_ENTERED,
new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent e) {
caption.setTranslateX(e.getX());
caption.setTranslateY(e.getY());
caption.setText(String.valueOf(dataTemp.getPieValue()));
caption.setVisible(true);
}
});
dataTemp.getNode().addEventHandler(MouseEvent.MOUSE_EXITED,
new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent e) {
caption.setVisible(false);
}
});
}
}
@Override
public Node getNodeGraph() {
return (Node)group;
}
@Override
public void setOptions(OptionsChart optionsChart) {
//To implemente
}
}
Thanks @eckig for your answers !