Apple Newton Utilities User's Guide download pdf (Page 381)

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CHAPTER 10

Recognition: Advanced Topics

About Advanced Topics in Recognition 10-5

A formatted comb view utilizes a template you deﬁne which speciﬁes characteristics

of the view’s behavior or appearance. A comb view’s template may specify an

initial value for the string that the view displays, the editing characteristics for each

position in the comb view, and ﬁlters that restrict the values recognized in each of

these positions. The template may also deﬁne methods for initializing and post-

processing the string displayed by the comb view. These methods may be useful

when the string displayed in the comb needs to be different from the input string or

when an externally-displayed string must differ from its internal representation.

When the user taps a character in a formatted comb view, it displays the list of

characters speciﬁed by its template, if that list contains ten or fewer items. (Note

that this value may change in future platforms.) Otherwise, it displays the list of

top-ranking alternate interpretations returned by the text recognizer.

Ambiguous Characters in protoCharEdit Views 10

Because there are several characters that are ambiguous in appearance—for

example, the value zero (

0) and the letter O, or the value one (1) and the letter L—

the built-in system fonts provide enhanced versions of these characters that

improve their readability. However, continuous use of these characters can be

distracting to the user. Thus, these fonts contain character codes that map to

alternate versions of the ambiguous characters, and the system provides functions

for mapping between the codes for the normal and enhanced characters. For more

information, see the descriptions of the

MapAmbiguousCharacters and

UnMapAmbiguousCharacters functions under “protoCharEdit Functions and

Methods” (page 8-47) in Newton Programmer’s Reference.

Deferred Recognition 10

Deferred recognition is the ability to convert strokes to text at some time other

than when the strokes are ﬁrst entered on the screen. Views that are to perform

deferred recognition must be capable of capturing ink text or ink. For example, a

view that bases its

recConfig frame on the system-supplied ROM_InkOrText

frame and uses a

protoRecToggle view to conﬁgure the recognition system

need not do anything more to provide the deferred recognition feature.

This section describes the user interface to deferred recognition and then provides a

programmer’s overview of this feature.

User Interface to Deferred Recognition 10

A view that performs deferred recognition uses the same settings as it would for

real-time text recognition: a combination of settings speciﬁed by user preferences

and settings speciﬁed by the view ﬂags or

recConfig frame associated with the

view in which recognition takes place.

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