+
+ /**
+ * Refresh the display according to the actual data (this method should be
+ * called when the data changed).
+ */
+ public void refreshData() {
+ invalidate();
+ }
+
+ /**
+ * Wake up call when the content is popped-back into view. You should call
+ * this method when you exit a previous content and come back to this one.
+ *
+ * @return a message to display, or NULL
+ *
+ * @throws IOException
+ * in case of error (the message of the {@link IOException} will
+ * be displayed to the user)
+ */
+ public String wakeup() throws IOException {
+ return null;
+ }