package labelissue;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class LabelIssue extends Application {
    
    int clickCounter = 0;

    public static void main(String[] args) {
        Application.launch(LabelIssue.class, args);
    }
    
    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Hello World");
        Group root = new Group();
        Scene scene = new Scene(root, 300, 250, Color.LIGHTGREEN);
        
        Button btn = new Button("Click me!");
        btn.setLayoutX(100);
        btn.setLayoutY(50);
        
        final Label lbl = new Label("");
        lbl.setTranslateX(100);
        lbl.setTranslateY(100);
        
        
        btn.setOnAction(new EventHandler<ActionEvent>() {

            public void handle(ActionEvent event) {
                
                System.out.println("Click accepted: " + clickCounter++);
                
                if( lbl.getText().equals("") ){
                    
                    lbl.setText("Hello, world!!!");
                }
                else{
                    
                    lbl.setText("");
                }
            }
            
        });
        
        root.getChildren().addAll(btn, lbl);        
        primaryStage.setScene(scene);
        primaryStage.setVisible(true);
    }
}