package com.onaro.sanscreen.client.view.task.actions.util;

import com.onaro.util.ListenerList;

import javax.swing.*;

public abstract class AbstractField {

    private ListenerList listeners = new ListenerList();

    /**
     * Gets the component for this field.
     * @return the component for this field.
     */
    abstract public JComponent getComponent();

    /**
     * Gets the label of this field.
     * @return the label for this field.
     */
    abstract public String getLabel();

    /**
     * Registers a listener for changes in this field.
     *
     * @param listener the listener
     */
    public void addFieldChangedListener(FieldChangedListener listener) {
        listeners.addListener(FieldChangedListener.class, listener);
    }

    /**
     * Removes a listener for changes to this field.
     *
     * @param listener the listener
     */
    public void removeFieldChangedListener(FieldChangedListener listener) {
        listeners.removeListener(FieldChangedListener.class, listener);
    }

    protected void fireFieldChanged() {
        listeners.fireEvent(FieldChangedListener.class, new FieldChangedEvent(this, getLabel()));
    }

}