GUI3

package gui.pizza;

import javafx.application.Application;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextArea;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

public final class Pizza extends Application {

    private Configuration config = new Configuration();

    private GridPane checkPane, radioPane;

    private TextArea summary;

    public void start(Stage primStage) {

        GridPane root = new GridPane();
        checkPane = new GridPane();
        radioPane = new GridPane();

        Scene scene = new Scene(root, 640, 480);
        primStage.setScene(scene);
        primStage.show();

        root.add(checkPane, 0, 0);
        root.add(radioPane, 0, 1);

        String[] list = config.getToppingNames();
        for (int a = 0, i = 0; i < list.length; i++) {
            a = i % 2;
            CheckBox tmpChk = new CheckBox(list[i]);
            if (i < config.getNumberOfDefaultToppings()) {
                tmpChk.setDisable(true);
                tmpChk.setSelected(true);
            }
            checkPane.add(tmpChk, a, i - a);
        }

        list = config.getSizeNames();
        ToggleGroup tglGrp = new ToggleGroup();
        for (int i = 0; i < list.length; i++) {
            RadioButton tmpButton = new RadioButton((list[i]));
            tmpButton.setToggleGroup(tglGrp);
            radioPane.add(tmpButton, i, 0);
        }

        Button orderButton = new Button("Bestellen");
        orderButton.setOnAction(e -> order());

        summary = new TextArea("");
        summary.setEditable(false);

        root.add(orderButton, 0, 2);
        root.add(summary, 0, 3);

    }

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

    private void order() {
        boolean sizePressed = false;
        for (Node radBtn : radioPane.getChildren()) {
            sizePressed = (((RadioButton) radBtn).isSelected()) ? true : sizePressed;
        }
        if (sizePressed) {
            StringBuffer str = new StringBuffer();
            str.append("Sie haben eine Pizza bestellt!\nZutaten: ");
            for (Node node : checkPane.getChildren()) {
                CheckBox check = (CheckBox) node;
                str.append((check.isSelected()) ? (check.getText() + ", ") : "");
            }
            str.setLength(str.length() - 1);
            RadioButton activeButton = (RadioButton) ((RadioButton) radioPane.getChildren().get(0)).getToggleGroup().getSelectedToggle();
            str.append("\nDie Größe ist: " + activeButton.getText());
            str.append("\nVielen Dank.");
            summary.setText(str.toString());
        } else {
            summary.setText("Bitte wählen Sie eine Pizzagröße");
            return;
        }

    }

}