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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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 */

package class7_2_Observer_CompleteExample_start.src.push;

import javafx.scene.control.TextArea;
import javafx.scene.input.KeyEvent;

import java.util.ArrayList;

public class SubjectTextArea implements Subject {
    private ArrayList<Observer> observers = new ArrayList<>();
    private TextArea subjectTextArea = new TextArea();

    public SubjectTextArea() {
        // Simple event handler that notifies all observers when a key is pressed in the text
        // area which indicates a state change
        subjectTextArea.addEventHandler(KeyEvent.KEY_RELEASED,
                (KeyEvent e) -> notifyObservers());
        subjectTextArea.setWrapText(true);
    }

    public TextArea getSubjectTextArea() {
        return subjectTextArea;
    }

    public String getText() {
        return subjectTextArea.getText();
    }

    @Override
    public void attach(Observer observer) {
        observers.add(observer);
    }

    @Override
    public void detach(Observer observer) {
        observers.remove(observer);
    }

    @Override
    public void notifyObservers() {
        for(int i = 0; i < observers.size(); i++) {
            observers.get(i).update(this);
        }
        System.out.println("Observers notified with notifyObservers()");
    }
}