import javafx.application.Application;
import javafx.application.Platform;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.Pane;
import javafx.scene.text.*;
import javafx.event.*;

public class TellMedVenting extends Application {
    int teller = 0;
    Text tellerSomText = new Text("0");

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

    static void ventAktivt(int n) {
	// Kj?r kode som tar omtrent n sekunder.
	for (int i = 1;  i <= n;  i++) {
	    long x = 1;
	    for (long j = 1;  j <= 250*1000*1000;  j++) {
		x = (3+j)*x % (1000*1000);
	    }
	}
    }

    class NulleBehandler implements EventHandler<ActionEvent> {
	@Override public void handle(ActionEvent e) {
	    teller = 0;  tellerSomText.setText("0");
	    ventAktivt(3);
	}
    }

    class TelleBehandler implements EventHandler<ActionEvent> {
	@Override public void handle(ActionEvent e) {
	    teller++;  tellerSomText.setText(""+teller);
	    ventAktivt(3);
	}
    }

    class StoppBehandler implements EventHandler<ActionEvent> {
	@Override public void handle(ActionEvent e) {
	    Platform.exit();
	}
    }

    @Override
    public void start(Stage teater) {
	tellerSomText.setFont(new Font(25));
	tellerSomText.setX(30);  tellerSomText.setY(25);

	Button telleknapp = new Button("?k teller");
	telleknapp.setLayoutX(10);  telleknapp.setLayoutY(50);
	TelleBehandler tell = new TelleBehandler();
	telleknapp.setOnAction(tell);

	Button nulleknapp = new Button("Nullstill");
	nulleknapp.setLayoutX(14);  nulleknapp.setLayoutY(80);
	NulleBehandler nulle = new NulleBehandler();
	nulleknapp.setOnAction(nulle);

	Button stoppknapp = new Button("Stopp");
	stoppknapp.setLayoutX(20);  stoppknapp.setLayoutY(110);
	StoppBehandler stopp = new StoppBehandler();
	stoppknapp.setOnAction(stopp);

	Pane kulisser = new Pane();
	kulisser.setPrefSize(90,150);
	kulisser.getChildren().add(tellerSomText);
	kulisser.getChildren().add(telleknapp);
	kulisser.getChildren().add(nulleknapp);
	kulisser.getChildren().add(stoppknapp);

	Scene scene = new Scene(kulisser);
	teater.setTitle("Teller");
	teater.setScene(scene);
	teater.show();
    }
}