Apple Newton Utilities Betriebsanweisung PDF herunterladen (Seite 777)

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CHAPTER 21

Routing Interface

Using Routing 21-29

data. That variable holds the printer selected by the user as the current printer. You

can use this function to obtain the current printer for the item:

item.printer := GetUserConfig('currentPrinter);

If you want to provide a way for the user to select a different printer, you can

use the printer chooser proto,

protoPrinterChooserButton. This proto

changes the setting of the current printer in the system; it actually changes the

currentPrinter variable.

If you don’t want to change the current printer in the user’s system, but just want

to let them select a printer for this one print job, then you’ll need to do the

following things:

1. Get and temporarily save the current value of the

currentPrinter variable in

the user conﬁguration data, using

GetUserConfig.

2. Display the printer chooser button, allowing the user to select a printer for this

print job. When they select one, the printer chooser proto automatically changes

the

currentPrinter variable to the chosen one.

3. Retrieve the new value of the

currentPrinter variable, using

GetUserConfig, and use that for the printer slot in the item frame.

4. Reset the user’s original printer choice by resetting the

currentPrinter

variable in the user conﬁguration data to the value you saved in step 1. To do

this you must use the function

SetUserConfig.

Opening a Routing Slip Programmatically 21

To open a routing slip programmatically for a transport, use the OpenRoutingSlip

function. First, create a new item by using the transport’s

NewItem method; then

add routing information such as the recipient or other information to the new item

frame; and ﬁnally, use

OpenRoutingSlip to open the routing slip for the transport.

Here’s an example of how to do these steps to open a routing slip for the built-in

Call transport:

// opening the Call Transport routing slip

local curs, item, anEntry, class, nameRef;

// get a new item frame from the transport

// '|phoneHome:Newton| identifies the Call transport

item := TransportNotify('|phoneHome:Newton|, 'NewItem, [nil]);

if item = 'noTransport or not item then

return 'noTransport;

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