Apple Newton Utilities User's Guide download pdf (Page 756)

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CHAPTER 21

Routing Interface

21-8 Using Routing

You must register all routing formats that you deﬁne with the system, usually in

your application part

InstallScript function. Registration is discussed in the

section “Registering Routing Formats” beginning on page 21-16.

Current Format 21

The routing system maintains a “current format,” which is the last routing format

used by your application for a speciﬁc transport, or the ﬁrst routing format

available otherwise. The current format sets the format picker in the routing slip the

next time the user chooses to route an item using the same transport.

The current format is saved in a slot in the application base view. It is your

responsibility to save this information to a soup if you want to preserve it. For more

information, see the section “Getting and Setting the Current Format” (page 21-11).

Routing Compatibility 21

The Routing interface described in this chapter is entirely new in system software

2.0. The previous Routing interface, documented in the original edition of

Newton

Programmer’s Guide, is obsolete, but still supported for compatibility with older

applications. Do not use the old Routing interface, as it will not be supported in

future system software versions.

Note that if a Newton 1.x application that includes the routing capability is run

under system software version 2.0, the names of routing actions in the Action

pickers may appear slightly differently than they do under Newton 1.x because of

the way the picker is constructed in Newton 2.0.

Also, note that custom transports designed using the Transport interface will not be

available to Newton 1.x applications.

Print Formats 21

In the Newton 1.x system, print formats have left and right default margins of

60 pixels. In Newton 2.0, the default margins are 0. In Newton 2.0, you must let the

print format set up its own view bounds and design its child views to be positioned

relative to their parent’s bounds. In other words, do not modify the

viewBounds

and

viewJustify slots of the print format.

Using Routing 21

This section describes how to use the Routing interface to perform these speciﬁc tasks:

■ provide transport-based routing actions

■ provide application-speciﬁc routing actions

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