XtAppInitialize(3Xt)XtAppInitialize(3Xt)NAME
XtAppInitialize, XtVaAppInitialize - initialize, open, or close a dis‐
play
SYNOPSIS
Widget XtAppInitialize(app_context_return, application_class, options,
num_options, argc_in_out, argv_in_out, fallback_resources, args,
num_args)
XtAppContext app_context_return;
String application_class;
XrmOptionDescRec* options;
Cardinal num_options;
int* argc_in_out;
String* argv_in_out;
String* fallback_resources;
ArgList args;
Cardinal num_args;
Widget XtVaAppInitialize(app_context_return, application_class,
options, num_options, argc_in_out, argv_in_out, fallback_resources,
...)
XtAppContext app_context_return;
String application_class;
XrmOptionDescRec* options;
Cardinal num_options;
int* argc_in_out;
String* argv_in_out;
String* fallback_resources;
ARGUMENTS
Specifies the application context. Specifies the class name of this
application, which usually is the generic name for all instances of
this application. Specifies how to parse the command line for any
application-specific resources. The options argument is passed as a
parameter to XrmParseCommand. For further information, see Xlib -- C
Language X Interface. Specifies the number of entries in the options
list. Specifies a pointer to the number of command line parameters.
Specifies the command line parameters. Specifies resource values to be
used if the application class resource file cannot be opened or read,
or NULL. Specifies the argument list to override any other resource
specification for the created shell widget. Specifies the number of
entries in the argument list. Specifies the variable argument list to
override any other resource specification for the created shell widget.
DESCRIPTION
The XtAppInitialize function calls XtToolkitInitialize followed by
XtCreateApplicationContext, then calls XtOpenDisplay with dis‐
play_string NULL and application_name NULL, and finally calls XtAppCre‐
ateShell with application_name NULL, widget_class applicationShellWid‐
getClass, and the specified args and num_args and returns the created
shell. The modified argc and argv returned by XtDisplayInitialize are
returned in argc_in_out and argv_in_out. If app_context_return is not
NULL, the created application context is also returned. If the display
specified by the command line cannot be opened, an error message is
issued and XtAppInitialize terminates the application. If fall‐
back_resources is non-NULL, XtAppSetFallbackResources is called with
the value prior to calling XtOpenDisplay.
XtAppInitialize and XtVaAppInitialize have been superceded by XtOpenAp‐
plication and XtVaOpenApplication respectively.
NOTES
In internationalized applications, the XtSetLanguageProc function sets
the language procedure for XtDisplayInitialize. In such applications,
the catopen call must execute following the call to XtAppInitialize
(which indirectly calls XtDisplayInitialize through XtOpenDisplay).
If the catopen call executes after XtSetLanguageProc but before the
call that initializes the display, the application does not access
translated messages when these are available for the language setting.
SEE ALSOcatopen(3), XtOpenApplication(3Xt), XtSetLanguageProc(3Xt), XtVaOpenAp‐
plication(3Xt)
X Toolkit Intrinsics -- C Language Interface
Xlib -- C Language X Interface
XtAppInitialize(3Xt)
