package test;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.chart.PieChart;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class PieResize extends Application {

	@Override
	public void start(final Stage primaryStage) throws Exception {
		ObservableList<PieChart.Data> pieChartData = FXCollections.observableArrayList(
				new PieChart.Data("AAAAAAAAAAAAAAAAAA", 20),
				new PieChart.Data("BBBBBBBBBBBBB", 12),
				new PieChart.Data("CCCCCCCCCCCCCCCCCCCC", 25),
				new PieChart.Data("DDDDDDDDDDDDD", 22),
				new PieChart.Data("EEEEEEEEEEEEEEEE", 30),
				new PieChart.Data("FFFFFFFFFFFFFFF", 5),
				new PieChart.Data("GGGGGGGGGG", 10),
				new PieChart.Data("HHHHHHHHHHHHHHHH", 8));
		final PieChart chart = new PieChart(pieChartData);
		final Label label = new Label();
		VBox vbox = new VBox(5);
		vbox.getChildren().addAll(label, chart);
		vbox.setOnMouseClicked(new EventHandler<MouseEvent>() {
			public void handle(MouseEvent me) {
				primaryStage.setWidth(386);
                                Platform.runLater(new Runnable() {
                                    @Override public void run() {
                                        chart.requestLayout();
                                    }
                                });
			}
		});
		vbox.widthProperty().addListener(new ChangeListener<Number>() {

			public void changed(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
				label.setText(newValue.toString());
			}
		});
		primaryStage.setScene(new Scene(vbox));
		primaryStage.show();
	}

	public static void main(String[] args) {
		launch(args);
	}
}