Apple Newton Utilities Guide de l'utilisateur télécharger pdf (Page 329)

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CHAPTER 8

Text and Ink Input and Display

Using Text 8-37

Each view path must specify the actual view that accepts the input. An example of

a suitable path is shown here:

'myInputLine, 'myLabelInputLine.entryLine

When the user tabs through this list, it loops from end to beginning and, with

reverse-tabbing, from beginning to end.

You can use the

_tabParent slot to inform the system that you want tabbing in a

view restricted to that view. Each view in which

_tabParent is non-nil deﬁnes a

tabbing context. This makes it possible to have several views on the screen at once

with independent tabbing within each view. In this case, the user must tap in

another view to access the tabbing order in that view.

For example, in Figure 8-15, there are two independent tabbing orders. The ﬁrst

consists of the input lines that contain the text “One,” “Two,” “Three,” and “Four”.

The second tabbing order consists of the input lines that contain the text “Five”

and “Six.”

Figure 8-15 Independent tabbing orders within a parent view

The user taps in any of the top four slots; thereafter, pressing the tab key on a keypad

or external keyboard moves among the four slots in that tabbing order. If the user

taps one of the bottom two slots, the tab key jumps between those two slots.

The slots

_tabParent and _tabChildren can coexist in a view, but the

_tabChildren slot takes precedence in specifying the next key view. If the

current view does not deﬁne the

_tabParent slot, the search moves upward from

the current view until one of the following conditions is met:

■ a view descended from protoInputLine with a _tabParent slot is found.

■ a protofloater view is found

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Apple Newton Utilities Guide de l'utilisateur Page 329

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