Apple Newton Utilities Betriebsanweisung PDF herunterladen (Seite 399)

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101

CHAPTER 10

Recognition: Advanced Topics

Using Advanced Topics in Recognition 10-23

Avoid including inappropriate items in the recToggle popup, such as an ink text

item for a view that does not support ink text. It is your responsibility to ensure that

the

_recogPopup array includes only symbols representing valid choices for the

view that the

recToggle conﬁgures.

Accessing Correction Information 10

As words are recognized, the system saves correction information that includes

■ the stroke bundle. (See “Unrecognized Strokes” on page 9-7.)

■ alternate interpretations returned by the recognizer. (See “Classifying Strokes”

on page 9-3.)

■ learning data. (See “Correction and Learning” on page 9-13.)

You can call the

GetCorrectInfo global function at any time to obtain

correction information for recently-recognized words. This function returns a

correctInfo frame based on the protoCorrectInfo system prototype.

The

info slot in the correctInfo frame holds an array of wordInfo frames

based on the

protoWordInfo system prototype. Each wordInfo frame

represents a single written word.

The

max slot in the correctInfo frame speciﬁes the maximum number of words

for which it holds correction information. When adding a new element to the

info

array will cause this array to exceed the size speciﬁed by the

max slot, the system

removes the ﬁrst element of the

info array, uses its learning data if necessary, and

adds the new

wordInfo frame to the info array.

The

correctInfo frame provides a number of methods that you can use to

manipulate its contents; for more information, see “CorrectInfo Functions and

Methods” (page 8-54) in Newton Programmer’s Reference.

Each

wordInfo frame speciﬁes the following information:

■ the view that contains the word.

■ the position of the word within the clParagraphView view that displays it.

■ the list of alternate interpretations of the input strokes.

■ an identiﬁer specifying the recognizer that interpreted the input.

■ a stroke bundle (optional).

■ learning data (optional).

As an alternative to obtaining

wordInfo frames from the correctInfo frame,

you can extract these frames from the word unit passed to an optional

ViewWordScript method that your view provides. For a description of this

method, see “Application-Deﬁned Recognition Methods” (page 8-66) in Newton

Programmer’s Reference.

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