Apple Newton Utilities Guide de l'utilisateur télécharger pdf (Page 738)

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CHAPTER 20

Localizing Newton Applications

20-6 Using the Localization Features of the Newton

Measuring String Widths at Compile Time 20

When the size of a screen element depends on the size of associated text, you can

use the

MeasureString function to determine, at compile time, how big to make

the screen element. If you want to determine the size at runtime, use

StrFontWidth.

You could establish the width of the search message, for example, by using

MeasureString and LocObj together.

MeasureString(LocObj("What is your name?",

'find.nameQ), simpleFont12);

At compile time, the MeasureString call is replaced with a constant as long as

the arguments to

MeasureString are also constant. (LocObj produces a

constant result at compile time.) You could access the width at run time from the

view’s

ViewDrawScript method with this function:

func()

begin

local newBounds := deepClone(viewBounds);

newBounds.right := newBounds.left +

MeasureString("This is a string", simpleFont12);

SetValue(self, 'viewBounds, newBounds);

end

Determining Language at Run Time 20

You can determine the language at run time, and your program can use that

information to modify its behavior.

There are two ways to determine the current language:

■ Examine the active locale bundle. You can also add new locale bundles to give

the user new locale options and can set the locale from within your program.

The sections that follow discuss how to examine the active locale bundle.

■ Use the GetLanguageEnvironment function to ﬁnd out the native language

for which the ROMs on the Newton device are implemented.

Note that you need to decide which of these methods your application should use

in order to determine its behavior.

Examining the Active Locale Bundle 20

The global function GetLocale returns the active locale bundle, which is the

locale bundle that the Country pop-up is currently set to. Use this function rather

than accessing the frame directly.

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Apple Newton Utilities Guide de l'utilisateur Page 738

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