OOP2

package be.uhasselt.oo2.mvc.app.clock;

import be.uhasselt.oo2.mvc.AbstractView;

import be.uhasselt.oo2.mvc.Controller;

import java.awt.Color;

import java.util.Observable;

import javax.swing.JComponent;

import javax.swing.JTextField;

/**

 * A digital clock View for the ClockModel. This View has no user inputs, so no 

 * Controller is required.

 * @author jvermeulen

 */

public class ClockDigitalView extends AbstractView {

    // The user interface for this view.

    private JTextField mClock;

    public ClockDigitalView(Observable model, Controller controller) {

        super(model, controller);

        init();

    }

    /**

     * Initializes the user interface.

     */

    private void init() {

        mClock = new JTextField();

    }

    /**

     * Updates the state of the on-screen digital clock.

     * Invoked automatically by ClockModel.

     * @param o The ClockModel object that is broadcasting an update

     * @param info A ClockUpdate instance describing the changes that have 

     * occurred in the ClockModel

     */

    @Override

    public void update(Observable o, Object info) {    

        // Cast info to ClockUpdate type.

        ClockUpdate clockInfo = (ClockUpdate) info;

        // Create a String representing the time.        

        String timeString = formatTime(clockInfo);

        // Display the new time in the clock text field.

        mClock.setText(timeString);

        // Fade the color of the display if the clock isn't running.

        if (clockInfo.isRunning()) {

          mClock.setBackground(Color.white);

        } else {

          mClock.setBackground(Color.gray);

        }

    }

    /**

     * Convenience method to return the user interface component. We don't need 

     * this if we implement View directly and directly subclass a GUI component.

     * @return the JComponent representing this View.

     */

    public JComponent getUI() {

        return mClock;

    }

    private String formatTime(ClockUpdate info) {

        return String.format("%d:%d:%d", 

                             info.getHour(), 

                             info.getMinute(), 

                             info.getSecond());

    }        

}