Apple Newton Utilities Uživatelská příručka stáhnout pdf (Strana 153)

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CHAPTER 4

NewtApp Applications

Using NewtApp 4-15

■ Optional. Set the statusBarSlot to contain the declared name of the status

bar so layouts can use it to control the buttons displayed on it. Use the symbol

'status to set it.

If you wish to override a system message like

ViewSetupFormScript, which is

called before a view is displayed on the screen, make sure to call the inherited

method at the end of your own

ViewSetupFormScript method. Also, you may

wish to add a

ReOrientToScreen method to the newtApplication base

view so your application can rotate to a landscape display. This message is sent to

each child of the root view when the screen orientation is changed. See

ReOrientToScreen (page 2-73) in Newton Programmer’s Reference for details.

Finally, be sure to add the layout ﬁle

baseView.t to your project and mark it as

the application base view.

Tying Layouts Into the Main Application 4

The allLayouts slot in the newtApplication proto is a frame that contains

symbols for the application’s layout ﬁles. It must contain two slots, named

default and overview, that refer to the two layout files used for those

respective views.

The section “Using the Layout Protos,” beginning on page 4-16, shows how to use

the NewtApp layout protos to construct these ﬁles. Assume they are named Default

Layout and Overview Layout for the purpose of setting the references to them in

the

allLayouts slot. The following code segment sets the allLayouts slot

appropriately:

allLayouts:= {

default: GetLayout("Default Layout"),

overview: GetLayout("Overview Layout"),

}

Setting Up the Application Soup 4

The newtApplication proto uses the values in its allSoups slot to set up and

The framework also looks in the

allSoups slot to get the appropriate

soup information for each layout. It does this by matching the value of

the layout’s

masterSoupSlot to the name of a frame contained in the

newtApplication.allSoups slot. See the section “Using the Layout Protos,”

following this one.

This application contains only one soup, though a NewtApp application can

contain more than one. Each soup deﬁned for a NewtApp application must be

based on the

newtSoup proto. The slots soupName, soupIndices, and

soupQuery must be defined within the allSoups soup definition frame.

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