Apple Newton Utilities Guide de l'utilisateur télécharger pdf (Page 757)

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CHAPTER 21

Routing Interface

Using Routing 21-9

■ send items programmatically

■ receive items

■ allow items to be viewed in the In/Out Box

Providing Transport-Based Routing Actions 21

Here’s a summary of the minimum things you need to do to support routing by the

Action button in an application:

■ Include the Action button in your application (or in individual views) by adding

a view based on the

protoActionButton proto.

■ Supply a GetTargetInfo method in your application (or in individual views)

or ensure that the

target and targetView slots are set up correctly with the

target object and target view, so the system can determine what is being routed.

■ Ensure that the target data object has a meaningful class (for frame objects, this

is the

class slot). The data class is used to determine the appropriate formats,

and thus transports, available to an item.

■ Create one or more routing formats, using one of the routing format protos. Give

your formats unique

symbol and title slots, and supply the SetupItem

method, if necessary. View formats may need a

PrintNextPageScript

method for multiple pages, and may need a

FormatInitScript method if

much preparation must be done before printing or faxing. Text formats may

need a

TextScript method.

■ Register your routing formats in the application part InstallScript function

and unregister them in the

RemoveScript function.

To support routing through transports, your application uses one or more routing

formats. These may be custom formats registered by your application or other

formats built into the system or installed separately. For more information about

routing formats, see the section “Routing Formats” beginning on page 21-5. There

are some prototype formats built into the system that you must use to create your

own formats:

■ To create a format for routing a 'view data type, use the

protoPrintFormat; see “Creating a Print Format” (page 21-18).

■ To create a format for routing 'frame and 'text data types, use the

protoFrameFormat; see “Creating a Frame Format” (page 21-21).

■ To create a new kind of format for data types other than 'view or 'frame, you

can use the

protoRoutingFormat; see “Creating a New Type of Format”

(page 21-22).

The following sections describe the more detailed aspects of supporting transport-

based routing.

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