Apple Newton Utilities User's Guide download pdf (Page 665)

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101

CHAPTER 18

Intelligent Assistant

Using the Assistant 18-19

preConditions array is related to the first element of the signature array,

the second element of the

preConditions array is related to the second

element of the

signature array, and so on. For more information, see the

section “The Signature and PreConditions Slots” (page 18-10).

9. Place the value

nil in the score slot. This slot is used internally by the Assistant.

Sample Task Template 18

The following code fragment is an example of a task template. This template might

be used to implement an action in a home banking application:

payTemplate := {

value: "Pay Template", // name of this template

isa: 'task_template, // must use this value

primary_act: myPayAction, // primary action

PostParse: func () begin … end, // PostParse method

// required templates

signature: [myPayAction, myWho, myAmount, myWhen],

// slots to create as required templates are matched

preConditions: ['action, 'name, 'amount, 'when],

score: nil // for internal use

}

Registering and Unregistering the Task Template 18

To register your task template, call the RegTaskTemplate function from your

application part’s InstallScript function. When the task template is registered

successfully, the value returned by

RegTaskTemplate is a reference to the task

frame. You need to save a reference to the value returned by this function, because

you’ll need that value later to unregister the task template. If

RegTaskTemplate

returns

nil, the template was not registered successfully.

To unregister your task template, call the

UnRegTaskTemplate function, passing

as its argument the result that was returned by

RegTaskTemplate when you ﬁrst

registered the task template. It is recommended that you call the

UnRegTaskTemplate function from your application part’s RemoveScript

method.

Displaying Online Help From the Assistant 18

Application help takes the form of a help book created with Newton Book Maker.

You need to take the following steps to open a help book from the Assistant:

1. In your application’s base view, deﬁne a

viewHelpTopic slot. The value of

this slot is a string that is the name of a topic in the help book to be opened.

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