Name
XtIsConstraint — test whether a widget is a subclass of the Constraint widget class.
Synopsis
Boolean XtIsConstraint(object)
Widget object;
Arguments
objectSpecifies the widget whose class is to be tested; may be of class Object or any subclass thereof.
Description
XtIsConstraint tests whether a widget is a subclass of the Constraint widget class. This is really just a convenience function equivalent to calling XtIsSubclass with constraintWidgetClass as the object_class argument. XtIsConstraint is defined as a macro in <X11/Intrinsic.h>:
#define XtIsConstraint(widget) XtIsSubclass(widget, (WidgetClass) \
constraintWidgetClass)