import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.chart.PieChart;
import javafx.scene.control.Label;
import javafx.stage.Stage;
import javafx.scene.text.Font;
 
/**
*
* @web http://java-buddy.blogspot.com/
*/
public class JavaFXApplication61 extends Application {
 
  Label label;
 
  /**
   * @param args the command line arguments
   */
  public static void main(String[] args) {
      launch(args);
  }
 
  @Override
  public void start(Stage primaryStage) {
      primaryStage.setTitle("java-buddy.blogspot.com");
      Group root = new Group();
     
      ObservableList<PieChart.Data> pieChartData =
              FXCollections.observableArrayList(
                  new PieChart.Data("January", 100),
                  new PieChart.Data("February", 200)
              );
                  
     
      final PieChart pieChart = new PieChart(pieChartData);
      pieChart.setTitle("PieChart");
     
      label = new Label("");
      label.setFont(new Font(14.0));
     
      //add event handler
      for(final PieChart.Data data : pieChart.getData()){
         
          data.getNode().addEventHandler(
                  javafx.scene.input.MouseEvent.MOUSE_ENTERED,
                  new EventHandler<javafx.scene.input.MouseEvent>() {
                     
                      @Override
                      public void handle(javafx.scene.input.MouseEvent mouseEvent) {
 
                          String name = data.getName();
                          double value = data.getPieValue();
                          label.setText(name + " : " + String.valueOf(value));
                          
                      }
                  });
         
          data.getNode().addEventHandler(
                  javafx.scene.input.MouseEvent.MOUSE_EXITED,
                  new EventHandler<javafx.scene.input.MouseEvent>() {
                     
                      @Override
                      public void handle(javafx.scene.input.MouseEvent mouseEvent) {
                          label.setText("");
                      }
                  });
      }
     
      root.getChildren().add(pieChart);
      root.getChildren().add(label);
 
      primaryStage.setScene(new Scene(root, 500, 400));
      primaryStage.show();
  }
 
}