import java.util.List;
import java.util.LinkedList;

public class EscapeHandler extends Thread {

    private StringScrambler ss;
    private List<EscapeListener> listeners;

    public EscapeHandler(StringScrambler ss) {
        this.ss = ss;
        this.listeners = new LinkedList<EscapeListener>();
    }

    public void run() {
        while (true) {
            short = ss.GetAsyncKeyState(0x1B);
            if (short == -32768 || short == -32767)
                for (int i = 0; i < listeners.size(); i++)
                    listeners.get(i).escapePressed(); // @ NO PARAM NEEDED
        }
    }

    public synchronized void addEscapeListener(EscapeListener listener) {
        listeners.add(listener);
    }

    public synchronized void removeEscapeListener(EscapeListener listener) {
        listeners.remove(listener);
    }


}