ClockDigitalView.java
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import java.util.Observable; |
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import javax.swing.JComponent; |
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import javax.swing.JTextField; |
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import java.awt.event.ActionEvent; |
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import java.awt.event.ActionListener; |
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|
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/** |
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* A digital clock View for the ClockModel. This View has no user inputs, so no |
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* Controller is required. |
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* @author jvermeulen |
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*/ |
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//BRING THE CHANGE! This should be updatable, so controllers and stuff will be added. |
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public class ClockDigitalView extends AbstractView { |
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|
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// The user interface for this view. |
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private JTextField mClock; |
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|
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public ClockDigitalView(Observable model, DigitalClockController controller) { |
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super(model, controller); |
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init(); |
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} |
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|
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/** |
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* Initializes the user interface. |
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*/ |
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private void init() { |
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mClock = new JTextField(); |
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mClock.addActionListener(new ActionListener() { |
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@Override |
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public void actionPerformed(ActionEvent e) { |
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((DigitalClockController)getController()).onEdit(mClock.getText()); |
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} |
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}); |
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} |
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|
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/** |
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* Updates the state of the on-screen digital clock. |
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* Invoked automatically by ClockModel. |
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* @param o The ClockModel object that is broadcasting an update |
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* @param info A ClockUpdate instance describing the changes that have |
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* occurred in the ClockModel |
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*/ |
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@Override |
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public void update(Observable o, Object info) { |
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// Cast info to ClockUpdate type. |
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ClockUpdate clockInfo = (ClockUpdate) info; |
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|
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// Create a String representing the time. |
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String timeString = formatTime(clockInfo); |
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|
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// Display the new time in the clock text field. |
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mClock.setText(timeString); |
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|
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// Fade the color of the display if the clock isn't running. |
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if (clockInfo.isRunning()) { |
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mClock.setBackground(Color.white); |
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} else { |
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mClock.setBackground(Color.gray); |
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} |
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} |
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|
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/** |
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* Convenience method to return the user interface component. We don't need |
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* this if we implement View directly and directly subclass a GUI component. |
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* @return the JComponent representing this View. |
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*/ |
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@Override |
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public Controller defaultController(Observable model) { |
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return new DigitalClockController(model); |
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} |
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|
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public JComponent getUI() { |
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return mClock; |
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} |
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|
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private String formatTime(ClockUpdate info) { |
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return String.format("%d:%d:%d", |
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info.getHour(), |
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info.getMinute(), |
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info.getSecond()); |
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} |
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|
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} |
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