Volume 6A: Motif Programming Manual

operates in that language without changes to the binary. An internationalized application must display all of its text in

the user's language and accept textual input in that same language. It must also display dates, times, and numbers in

the appropriate format for the language environment.

X internationalization is based on the ANSI−C internationalization model. This approach is based on the concept of

localization, whereby an application uses a library that reads a customizing database at startup time. This database

contains information about the characteristics of every locale that is supported by the system. When an application

establishes its locale by calling setlocale(), the library customizes the behavior of various routines based on the

locale. See the Third Edition of Volume One, Xlib Programming Manual, for a complete description of the concepts

and implementation of X internationalization.

Xt support of internationalization is trivial in most applications; the only additional code needed is a call to

XtSetLanguageProc() before the toolkit is initialized. XtSetLanguageProc() sets the language procedure

that is used to set the locale of an application. The first argument to the routine specifies an application context, the

second argument specifies the language procedure, and the third parameter specifies additional data that is passed to

the language procedure when it is called. Since the language procedure is responsible for setting the locale, an Xt

application does not call ...