Apple Newton Utilities Uživatelská příručka stáhnout pdf (Strana 154)

100

101

CHAPTER 4

NewtApp Applications

4-16 Using NewtApp

Use code similar to the following example to set the allSoups slot:

allSoups:=

{ IOUSoup: {_proto: newtSoup,

soupName: "IOU:PIEDTS",

soupIndices: [

{structure: 'slot,

path: 'title,

type: 'string},

{structure: 'slot,

path: 'timeStamp,

type: 'int},

{ structure: 'slot,

path: 'labels,

type: 'tags }

soupQuery: {type: 'index, indexPath:

'timeStamp},

soupDescr: "The IOU soup.",

defaultDataType: '|BasicCard:sig|,}

}

Using the Layout Protos 4

Each NewtApp Application requires exactly two layouts: a default layout,

displayed when the application is opened, and an overview layout, displayed when

the Overview button is tapped.

The NewtApp framework layout proto you choose for your default view, sets up

your application as either a card-, roll-, or page-style application.

Unique slots in the layout protos include:

■ masterSoupSlot

■ forceNewEntry

The

masterSoupSlot is the most important. It contains a reference to the

application soup in the

newtApplication.allSoups slot, from which the

layout gets its data.

■ The forceNewEntry slot allows your application to deal gracefully with

the situation created when someone opens a folder that is empty. If the

forceNewEntry slot is set to true in that situation, an entry is automatically

created. Otherwise, an alert slip announces that there are no

items in this list,

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