XtSetLanguageProc(3) XT FUNCTIONS XtSetLanguageProc(3)

# [NAME](#NAME)

XtSetLanguageProc - set the language procedure

# [SYNTAX](#SYNTAX)

#include <X11/Intrinsic.h>

XtLanguageProc XtSetLanguageProc(XtAppContext *app\_context*, XtLanguageProc *proc*, XtPointer *client\_data*);

# [ARGUMENTS](#ARGUMENTS)

[*app\_context*](#app_context)

Specifies the application context in which the language procedure is to be used, or NULL.

[*proc*](#proc)

Specifies the language procedure, or NULL.

[*client\_data*](#client_data)

Specifies additional client data to be passed to the language procedure when it is called.

# [DESCRIPTION](#DESCRIPTION)

**XtSetLanguageProc** sets the language procedure that will be called from **XtDisplayInitialize** for all subsequent Displays initialized in the specified application context. If *app\_context* is NULL, the specified language procedure is registered in all application contexts created by the calling process, including any future application contexts that may be created. If *proc* is NULL a default language procedure is registered. **XtSetLanguageProc** returns the previously registered language procedure. If a language procedure has not yet been registered, the return value is unspecified but if this return value is used in a subsequent call to **XtSetLanguageProc**, it will cause the default language procedure to be registered.

The default language procedure does the following:

- Sets the locale according to the environment. On ANSI C-based systems this is done by calling **setlocale**( **LC\_ALL**, language ). If an error is encountered a warning message is issued with **XtWarning**.
- Calls **XSupportsLocale** to verify that the current locale is supported. If the locale is not supported, a warning message is issued with **XtWarning** and the locale is set to “C”.
- Calls **XSetLocaleModifiers** specifying the empty string.
- Returns the value of the current locale. On ANSI C-based systems this is the return value from a final call to **setlocale**( **LC\_ALL**, NULL ).

A client wishing to use this mechanism to establish locale can do so by calling **XtSetLanguageProc** prior to **XtDisplayInitialize.**

# [SEE ALSO](#SEE_ALSO)

*X Toolkit Intrinsics - C Language Interface*  
*Xlib - C Language X Interface*

libXt 1.3.1 X Version 11

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Document: XtSetLanguageProc(3) from libxt 1.3.1-r11 (Chainguard OS)
Source: https://gitlab.freedesktop.org/xorg/lib/libxt.git