Table of Contents
XtOpenApplication, XtVaOpenApplication
- initialize, open, or close a display
Widget XtOpenApplication(app_context_return,
application_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, application_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;
- 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.
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.
XtAppInitialize(3Xt)
, XtVaAppInitialize(3Xt)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
Table of Contents