Apple Newton Utilities Guide de l'utilisateur télécharger pdf (Page 401)

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CHAPTER 10

Recognition: Advanced Topics

Using Advanced Topics in Recognition 10-25

application’s NTK project; they might be supplied by the user in an input line

view; they might even arrive as serial data. Because dictionary items can originate

from a number of sources, the example here presumes that you know how to store

your word strings and pass them, one at a time, to the

AddWordToDictionary

function. This function adds its argument to the speciﬁed custom dictionary.

The

AddWordToDictionary function does not place any restrictions on the

strings to be entered in the dictionary; however, your intended use of the dictionary

entry may inﬂuence its content. For nonrecognition purposes, such as validating

input to a ﬁeld, any string is a valid dictionary entry. For use in stroke recognition,

strings in enumerated dictionaries must not include spaces. The printed recognizer

accepts the full set of ASCII characters; the cursive recognizer does not. Digits

or non-alphabetic characters in dictionary entries used by the cursive recognizer

must appear in the input string in order to be recognized. Do not use the

AddWordToDictionary function to add items to the review dictionary; use the

appropriate

reviewDict methods instead.

You can take the following steps to create a RAM-based enumerated dictionary at

run time:

1. Use the global function

NewDictionary to create a new empty dictionary.

2. Use the global function

AddWordToDictionary to add dictionary items to

the new dictionary.

3. Use the global function

GetDictionaryData to create a binary

representation of the completed dictionary, which can then be stored in a soup.

Another way to do this is to create a new dictionary and restore its data from a soup.

The next several sections describe the numbered steps in greater detail. Following

this discussion, the section “Restoring Dictionary Data From a Soup” (page 10-28),

describes how to restore an existing dictionary from soup data.

Creating the Blank Dictionary 10

You can create a blank RAM-based dictionary anywhere in your application that

makes sense; a common approach is to take care of this in the

ViewSetupFormScript method of the application’s base view. You must also

create a slot in which to store the RAM-based dictionary. The following code

fragment creates a dictionary in the

mySpecialDictionary slot.

ViewSetupFormScript := func()

begin

mySpecialDictionary := NewDictionary('custom);

end

This code example uses the NewDictionary function to create a blank dictionary

in the

mySpecialDictionary slot. The NewDictionary function accepts the

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Apple Newton Utilities Guide de l'utilisateur Page 401

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