import java.awt.event.ActionListener;
import java.awt.event.KeyListener;

/**
 * The interface for our view class
 */
public interface IView {
  /**
   * Set the label that is showing what the model stores.
   *
   * @param s
   */
  void setEchoOutput(String s);

  /**
   * Get the string from the text field and return it
   *
   * @return
   */
  String getInputString();

  /**
   * Clear the text field. Note that a more general "setInputString" would work for this
   * purpose but would be incorrect. This is because the text field is not set programmatically
   * in general but input by the user.
   */

  void clearInputString();

  /**
   * Reset the focus on the appropriate part of the view that has the keyboard listener attached
   * to it, so that keyboard events will still flow through.
   */
  void resetFocus();

  /**
   * Toggle the color of the displayed text. This is an explicit view operation because
   * this is something that only the view can control
   */
  void toggleColor();

  /**
   * this is to force the view to have a method to set up the keyboard.
   * The name has been chosen deliberately. This is the same method signature to
   * add a key listener in Java Swing.
   * <p>
   * Thus our Swing-based implementation of this interface will already have such a
   * method.
   *
   * @param listener
   */
  void addKeyListener(KeyListener listener);

  /**
   * this is to force the view to have a method to set up actions for buttons.
   * All the buttons must be given this action listener
   * <p>
   * Thus our Swing-based implementation of this interface will already have such a
   * method.
   *
   * @param listener
   */

  void addActionListener(ActionListener listener);
}