Apple Newton Utilities User's Guide Page 619

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CHAPTER 17
Additional System Services
About Additional System Services 17-3
Online Help 17
Your application can provide a protoInfoButton view that displays customized
online help to the user (or a
newtInfoButton if working in the NewtApp
framework). Help can also be displayed from the Intelligent Assistant. For a
complete description of how to create a help book and integrate it with your
application, see version 2.0 of the
Book Maker User’s Guide. For a description of
the
protoInfoButton, see Chapter 7, “Controls and Other Protos.” For a
description of the
newtInfoButton proto, see Chapter 4, “NewtApp
Applications.” For information about displaying online help from the Assistant, see
Chapter 18, “Intelligent Assistant.
Alerts and Alarms 17
The Alert service enables you to display messages to the user. The Alarms service
in addition to displaying a user alert, provides applications with a way to perform
actions at specied times.
User Alerts 17
The view method Notify displays a user alert slip similar to the one shown in
Figure 17-1. The system saves the last four alert messages. The user can scroll
through them by tapping the universal scroll arrows while the alert view is open.
Also, the user can tap the circled “i” to display the date and time of the message.
Figure 17-1 User alert
User Alarms 17
The Alarms service can be used to display an alert slip and execute a callback
function at a specied time. If the Newton is asleep at the time the alarm is to
execute, the alarm powers up the Newton and executes the callback function. The
user can temporarily dismiss the alert for a specied time period by tapping the
Snooze button included in the alarm slip, as shown in Figure 17-2.
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