XtAppErrorMsg()XtAppErrorMsg()NameXtAppErrorMsg - call the high-level fatal error handler.
Synopsis
void XtAppErrorMsg(app_context, name, type, class, default, params,
num_params)
XtAppContext app_context;
String name;
String type;
String class;
String default;
String *params;
Cardinal *num_params;
Inputs
app_context
Specifies the application context.
name Specifies the general kind of error.
type Specifies the detailed name of the error.
class Specifies the resource class of the error.
default Specifies the default message to use if no message is found
in the database.
params Specifies an array of values to be inserted into the message.
num_params
Specifies the number of elements in params.
ReturnsXtAppErrorMsg() terminates the application and does not return.
DescriptionXtAppErrorMsg() passes all of its arguments except app_context to the
installed high-level error handler. The default high-level error han‐
dler is _XtDefaultErrorMsg(). It calls XtAppGetErrorDatabaseText() to
lookup an error message of the specified name, type, and class in the
error database. If no such message is found, XtAppGetErrorDatabase‐
Text() returns the specified default message. In either case, _XtDe‐
faultErrorMsg() does a printf-style substitution of params into the
message, and passes the resulting text to the low-level error handler
by calling XtError().
See XtAppGetErrorDatabaseText() for details on how messages are looked
up in the error database.
Usage
To report non-fatal error messages or warnings without exiting, use
XtAppWarningMsg(). To change the high-level error handler, use
XtAppSetErrorMsgHandler().
Note that the num_params argument to this function is a Cardinal *, not
a Cardinal.
Although the Intrinsics interface allows separate error and warning
handlers for each application context, most implementations will sup‐
port only a single set of handlers. When a new handler is installed,
it will be used in all application contexts.
Example
The following code is from the Intrinsics internal function _XtCre‐
ateWidget():
String params[2];
Cardinal num_params = 2;
params[0] = name;
params[1] = XtName(parent);
XtAppErrorMsg(XtWidgetToApplicationContext(parent),
"nonWidget", XtNxtCreateWidget, XtCXtToolkitError,
"attempt to add non-widget child to parent which supports only widgets",
params, &num_params);
See AlsoXtAppError(1), XtAppSetErrorHandler(1), XtAppSetErrorMsgHandler(1),
XtAppSetWarningHandler(1), XtAppSetWarningMsgHandler(1), XtAppWarn‐
ing(1), XtAppWarningMsg(1),
XtErrorMsgHandler(2).
Xt - Error Handling XtAppErrorMsg()
