XtOpenApplication(3Xt) XT FUNCTIONS XtOpenApplication(3Xt)NAME
XtOpenApplication, XtVaOpenApplication - initialize, open,
or close a display
SYNTAX
Widget XtOpenApplication(app_context_return, applica-
tion_class, options, num_options, argc_in_out,
argv_in_out, fallback_resources, widget_class, 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;
WidgetClass widget_class;
ArgList args;
Cardinal num_args;
Widget XtVaOpenApplication(app_context_return, applica-
tion_class, options, num_options, argc_in_out,
argv_in_out, fallback_resources, widget_class, ...)
XtAppContext app_context_return;
String application_class;
XrmOptionDescRec* options;
Cardinal num_options;
int* argc_in_out;
String* argv_in_out;
String* fallback_resources;
WidgetClass widget_class;
ARGUMENTS
app_context_return
Specifies the application context.
application_class
Specifies the class name of this application,
which usually is the generic name for all
instances of this application.
options 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.
num_options
Specifies the number of entries in the options
list.
argc_in_out
Specifies a pointer to the number of command
line parameters.
X Version 11 Release 6.4 1
XtOpenApplication(3Xt) XT FUNCTIONS XtOpenApplication(3Xt)
argv_in_out
Specifies the command line parameters.
fallback_resources
Specifies resource values to be used if the
application class resource file cannot be opened
or read, or NULL.
widget_class
Specifies the widget class of the shell to be
created.
args Specifies the argument list to override any
other resource specification for the created
shell widget.
num_args 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 XtOpenApplication function calls XtToolkitInitialize
followed by XtCreateApplicationContext, then calls
XtOpenDisplay with display_string NULL and applica-
tion_name NULL, and finally calls XtAppCreateShell with
appcation_name NULL, widget_class
applicationShellWidgetClass, 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 XtOpenApplication
terminates the application. If fallback_resources is non-
NULL, XtAppSetFallbackResources is called with the value
prior to calling XtOpenDisplay.
XtAppInitialize and XtVaAppInitialize have been superceded
by XtOpenApplication and XtVaOpenApplication respectively.
SEE ALSOXtOpenApplication(3Xt), XtVaOpenApplication(3Xt)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 Release 6.4 2