package klausur;

import java.util.Random;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;

public class Kreis extends Application {
    HBox hbButton;
    Button bMalen;
    StackPane leinwand;
    Circle kreis;


    @Override
    public void start(Stage primaryStage) throws Exception {
        erstelleButton();
        erstelleAktion();
        leinwand = new StackPane();
        BorderPane root = new BorderPane();
        root.setCenter(leinwand);
        root.setBottom(hbButton);
        Scene scene = new Scene(root, 300, 400);

        primaryStage.setScene(scene);
        primaryStage.setTitle("bunte Kreise");
        primaryStage.show();

    }

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

    }

    //Hilfsmethoden

    private void erstelleButton() {
        hbButton = new HBox();
        hbButton.setPadding(new Insets(10));
        hbButton.setSpacing(5);
        hbButton.setAlignment(Pos.CENTER);
        hbButton.setBackground(new Background(new BackgroundFill(Color.DARKGRAY, null, null)));
        bMalen = new Button("malen");
        hbButton.getChildren().add(bMalen);
    }

    private void erstelleAktion() {
        bMalen.setOnAction(e ->{
            Random r = new Random();
            leinwand.getChildren().clear();
            Color c = new Color(r.nextDouble(),r.nextDouble(),r.nextDouble(),1.0);
            kreis = new Circle(100,100,50, c);
            leinwand.getChildren().add(kreis);

        });


    }

}