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CHAPTER 9

Recognition

9-20 About the Recognition System

recognition takes place. The Entry Flags area of the NTK screen speciﬁes the view

ﬂags for this dynamically created child view separately from the view ﬂags for the

container view in which it appears. When the system creates the child view, it

copies the Entry Flags bits into the child view’s

viewFlags slot.

For simplicity’s sake, this chapter refers to all recognition-oriented ﬂags as “view

ﬂags.” This chapter and its corresponding section of the

Newton Programmer’s

Reference document all such flags as view flags.

Although the NTK view editor describes

vAnythingAllowed as a “ﬂag” it is

actually a mask that sets all bits in a

clEditView view’s input mask. This chapter

refers to this construct as the “

vAnythingAllowed mask.” See (page 9-8) for a

graphical depiction of the relationships between bits in the input mask and

recognition-related view ﬂags.

The use of

Field in the names of some ﬂags and Allowed in others is meant to

reﬂect these ﬂags’ intended use, rather than a functional difference.

The “ﬁeld” ﬂags are intended for setting up input views that accept a single kind of

input, such as dates. For example, setting the

vDateField ﬂag speciﬁes that the

view accepts numeric input in a format commonly used for dates in the current

locale. Setting this ﬂag enables the set of dictionaries appropriate for recognizing

such input.

On the other hand, the more inclusive “allowed” ﬂags are intended for use with

views that must recognize several kinds of input; for example, setting the

vNumbersAllowed flag specifies that the view accepts a wide range of numeric

input, such as currency values, times, and dates. Setting the

vNumbersAllowed

ﬂag alone, then, enables a more inclusive set of dictionaries than obtained by

setting the

vDateField ﬂag alone.

Despite differences in naming conventions (and despite the fact that the Field Type

popup menu in the NTK view editor considers these ﬂags mutually exclusive), the

“ﬁeld” and “allowed” ﬂags can be mixed in any combination. Keep in mind,

though, that the more choices the recognizer has, the more opportunity it has to

make the wrong choice.

Recognition Compatibility 9

In addition to the cursive recognizer available in previous systems, version 2.0 of

system software adds a recognizer optimized for printed characters. This recognizer,

represented by the Printed radio button in the Handwriting Recognition preferences

slip, is the default text recognizer used when you or the user do not specify otherwise.

Selecting the Cursive radio button in the Handwriting Recognition preferences slip

equates to selecting the Mixed Cursive and Printed radio button available in

previous versions of this slip: the cursive recognizer is enabled, all printed and

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