Apple Newton Utilities Uživatelská příručka stáhnout pdf (Strana 372)

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CHAPTER 9

Recognition

9-30 Using the Recognition System

or typing them. To prevent invalid input by these means, you can implement a

ViewChangedScript method that validates its view’s input.

Using the vAnythingAllowed Mask 9

The vAnythingAllowed mask can be used only with views based on the

clEditView class. When used by itself, this mask sets all of the bits in the view’s

input mask, potentially enabling all of the system-supplied recognizers and

dictionaries. However, the actual recognition behavior of views that use this mask

varies according to current user preference settings.

For a view that sets the

vAnythingAllowed mask, the recognition system

replaces the set of view ﬂags you’ve speciﬁed with a set of ﬂags derived from the

current settings of user preferences that affect recognition.The actual set of

recognizers enabled for the view is controlled by

■ user preferences speciﬁed in the system’s user conﬁguration data.

■ the application’s protoRecToggle view, if it has one.

■ the view’s recConfig frame, if it has one.

Slots in the system’s user conﬁguration data specify recognition behaviors that all

views inherit. However, an optional

protoRecToggle view can specify different

behaviors for individual views by overriding values inherited from user conﬁguration

data. Similarly, each view can provide a

recConfig frame that overrides settings

speciﬁed by the

protoRecToggle view or the system’s user conﬁguration data.

Thus, in practice, the

vAnythingAllowed mask usually is not what its name

implies: if any bit in this mask is turned off (by another ﬂag, or by a

recToggle

view, for example), the input mask is no longer

vAnythingAllowed.

The built-in Notepad application provides a good example of the behavior of views

that use the

vAnythingAllowed mask, including the use of a

protoRecToggle view to change recognition settings.

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