Apple Newton Utilities Podręcznik Użytkownika Pobierz pdf (Strona 388)

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101

CHAPTER 10

Recognition: Advanced Topics

10-12 Using Advanced Topics in Recognition

As an alternative to using a recConfig frame to provide support for ink text, you

can set your

clParagraphView view’s vAnythingAllowed mask. Although

this is truly the easiest way to support ink text, it is less-preferred because it

provides you the least control over the view’s recognition behavior. A variation on

this approach that may provide better performance is to enable an appropriate set

of view ﬂags rather than setting the

vAnythingAllowed mask. The best way to

support ink text, however, is through the use of a

recConfig frame that provides

appropriate values.

Regardless of the approach you take to provide ink text support, you should test

your view’s recognition behavior under both text recognizers, and under any other

conﬁgurations your

recToggle view provides.

To support both ink text and sketch ink in a single view, or to take other application-

speciﬁc action in response to changes in the state of a

recToggle view, your view

can provide a

RecogSettingsChanged method that reconﬁgures the its

recognition behavior dynamically. For more information, see “Changing

Recognition Behavior Dynamically” beginning on page 10-17.

For more information on

protoRecToggle views, see “Using protoRecToggle

Views” beginning on page 10-19. For detailed descriptions of

recConfig frames,

see “protoRecConﬁg” (page 8-36) and “System-Supplied recConﬁg Frames”

(page 8-18) in Newton Programmer’s Reference.

Fine-Tuning Text Recognition 10

To fine-tune either text recognizer’s interpretation of input strokes, you can add the

optional

speedCursiveOption, timeoutCursiveOption, and

letterSpaceCursiveOption slots to the recConfig frame. These

mechanisms for controlling recognizer behavior may affect various recognizers

differently. For more information, see “protoRecConﬁg” (page 8-36) in Newton

Programmer’s Reference. For a discussion of the

dictionaries slot, see “Using

Your RAM-Based Custom Dictionary” beginning on page 10-28.

Table 10-1 Recognition failure in paragraph or edit view controlled by recToggle

Recognizer enabled

by recToggle view Returns on failure

Text Ink text

Ink text Ink text (does not fail)

Shapes Sketch ink, smoothed

Sketch ink Nothing (occurs rarely)

1 2 ... 383 384 385 386 387 388 389 390 391 392 393 ... 941 942

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