NAME
XtOpenApplication, XtVaOpenApplication - initialize, open, or close a display
SYNTAX
Widget
XtOpenApplication(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(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.
- 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
application_name NULL, and finally calls
XtAppCreateShell with
application_name NULL, the specified
widget_class, 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 ALSO
XtAppInitialize(3), XtVaAppInitialize(3)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface