package javaapplication10;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Orientation;
import javafx.scene.Scene;
import javafx.scene.chart.PieChart;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.Separator;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class JavaApplication10 extends Application {

    public static void main(String[] args) {
        launch(JavaApplication10.class, args);
    }

    protected Scene getScene() {
        return new PieChartScene();
    }

    @Override
    public void start(Stage stage) throws Exception {
        stage.setScene(getScene());
        stage.show();
    }

    class PieChartScene extends Scene {

        //PieChart to be tested.
        PieChart testedPieChart;
        int controlContainerWidth = 400;
        int controlContainerHeight = 400;
        ObservableList<PieChart.Data> data;
        VBox properties;

        public PieChartScene() {
            super(new VBox(), 600, 600);
            prepareScene();
        }

        final protected void prepareScene() {
            testedPieChart = getNewChart();
            testedPieChart.setPrefSize(controlContainerHeight, controlContainerWidth);
            properties = new VBox(10);

            Button addDataButton = new Button("Add data at index 0");
            addDataButton.setOnAction(new EventHandler<ActionEvent>() {
                public void handle(ActionEvent t) {
                    testedPieChart.getData().add(0, new PieChart.Data("Added data", Math.random() * 100));
                }
            });

            Button removeDataButton = new Button("Remove data from index 0");
            removeDataButton.setOnAction(new EventHandler<ActionEvent>() {
                public void handle(ActionEvent t) {
                    if (testedPieChart.getData().size() > 0) {
                        testedPieChart.getData().remove(0);
                    }
                }
            });

            Button changeDataButton = new Button("Change data at index 0");
            changeDataButton.setOnAction(new EventHandler<ActionEvent>() {
                public void handle(ActionEvent t) {
                    if (testedPieChart.getData().size() > 0) {
                        PieChart.Data data = testedPieChart.getData().get(0);
                        data.setPieValue(Math.max(0, data.getPieValue() + (Math.random() - 0.5) * 200));
                    }
                }
            });

            VBox vb = (VBox) this.getRoot();
            vb.getChildren().addAll(testedPieChart,
                    new Separator(Orientation.HORIZONTAL), new Label("Add new data : "), addDataButton,
                    new Separator(Orientation.HORIZONTAL), new Label("Remove existing data : "), removeDataButton,
                    new Separator(Orientation.HORIZONTAL), new Label("Change existing data : "), changeDataButton);

        }

        public PieChart getNewChart() {
            data = FXCollections.<PieChart.Data>observableArrayList();
            for (int i = 0; i < 4; i++) {
                data.add(new PieChart.Data("Data item " + i, 50));
            }
            PieChart chart = new PieChart(data);
            chart.setTitle("PieChart");
            chart.setStyle("-fx-border-color: darkgray;");
            return chart;
        }
    }
}