xtiscomposite(3xt) [ultrix man page]

XtClass(3Xt)							     MIT X11R4							      XtClass(3Xt)

Name
       XtClass, XtSuperClass, XtIsSubclass, XtCheckSubclass, XtIsComposite, XtIsManaged - obtain and verify a widget's class

Syntax
       WidgetClass XtClass(w)
	  Widget w;

       WidgetClass XtSuperclass(w)
	  Widget w;

       Boolean XtIsSubclass(w, widget_class)
	  Widget w;
	  WidgetClass widget_class;

       void XtCheckSubclass(w, widget_class, message)
	  Widget w;
	  WidgetClass widget_class;
	  String message;

       Boolean XtIsComposite(w)
	  Widget w;

       Boolean XtIsManaged(w)
	   Widget w;

Arguments
       w	 Specifies the widget.

       widget_class
		 Specifies the widget class.

       message	 Specifies the message that is to be used.

Description
       The function returns a pointer to the widget's class structure.

       The function returns a pointer to the widget's superclass class structure.

       The function returns if the class of the specified widget is equal to or is a subclass of the specified widget class.  The specified widget
       can be any number of subclasses down the chain and need not be an immediate subclass of the specified widget class.  Composite widgets that
       need to restrict the class of the items they contain can use to find out if a widget belongs to the desired class of objects.

       The macro determines if the class of the specified widget is equal to or is a subclass of the specified widget class.  The widget can be
       any number of subclasses down the chain and need not be an immediate subclass of the specified widget class.  If the specified widget is
       not a subclass, constructs an error message from the supplied message, the widget's actual class, and the expected class and calls should
       be used at the entry point of exported routines to ensure that the client has passed in a valid widget class for the exported operation.

       is only executed when the widget has been compiled with the compiler symbol DEBUG defined; otherwise, it is defined as the empty string and
       generates no code.

       The function is a convenience function that is equivalent to with specified.

       The macro (for widget programmers) or function (for application programmers) returns if the specified child widget is managed or if it is
       not.

See Also
       XtAppErrorMsg(3Xt), XtDisplay(3Xt)
       X Window System Toolkit: The Complete Programmer's Guide and Specification, Paul J. Asente and Ralph Swick
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

																      XtClass(3Xt)

XtClass(3Xt)															      XtClass(3Xt)

NAME

       XtClass,  XtSuperclass,	XtIsSubclass, XtCheckSubclass, XtIsObject, XtIsRectObj, XtIsWidget, XtIsComposite, XtIsConstraint, XtIsShell, XtI-
       sOverrideShell, XtIsWMShell, XtIsVendorShell, XtIsTransientShell, XtIsTopLevelShell, XtIsApplicationShell, XtIsSessionShell  -  obtain  and
       verify a widget's class

SYNOPSIS

       WidgetClass XtClass(w)
	       Widget w;

       WidgetClass XtSuperclass(w)
	       Widget w;

       Boolean XtIsSubclass(w, widget_class)
	       Widget w;
	       WidgetClass widget_class;

       void XtCheckSubclass(widget, widget_class, message)
	       Widget widget;
	       WidgetClass widget_class;
	       String message;

       Boolean XtIsObject(w)
	       Widget w;

       Boolean XtIsRectObj(w)
	       Widget w;

       Boolean XtIsWidget(w)
	       Widget w;

       Boolean XtIsComposite(w)
	       Widget w;

       Boolean XtIsConstraint(w)
	       Widget w;

       Boolean XtIsShell(w)
	       Widget w;

       Boolean XtIsOverrideShell(w)
	       Widget w;

       Boolean XtIsWMShell(w)
	       Widget w;

       Boolean XtIsVendorShell(w)
	       Widget w;

       Boolean XtIsTransientShell(w)
	       Widget w;

       Boolean XtIsTopLevelShell(w)
	       Widget w;

       Boolean XtIsApplicationShell(w)
	       Widget w;

       Boolean XtIsSessionShell(w)
	       Widget w;

ARGUMENTS

       Specifies the widget.  Specifies the widget class.  Specifies the message that is to be used.

DESCRIPTION

       The XtClass function returns a pointer to the widget's class structure.

       The XtSuperclass function returns a pointer to the widget's superclass class structure.

       The  XtIsSubclass  function returns True if the class of the specified widget is equal to or is a subclass of the specified class. The wid-
       get's class can be any number of subclasses down the chain and need not be an immediate subclass of the specified class. Composite  widgets
       that  need  to  restrict  the  class of the items they contain can use XtIsSubclass to find out if a widget belongs to the desired class of
       objects.

       The XtCheckSubclass macro determines if the class of the specified widget is equal to or is a subclass of the specified widget  class.  The
       widget can be any number of subclasses down the chain and need not be an immediate subclass of the specified widget class. If the specified
       widget is not a subclass, XtCheckSubclass constructs an error message from the  supplied  message,  the	widget's  actual  class,  and  the
       expected  class and calls XtErrorMsg.  XtCheckSubclass should be used at the entry point of exported routines to ensure that the client has
       passed in a valid widget class for the exported operation.

       XtCheckSubclass is only executed when the widget has been compiled with the compiler symbol DEBUG defined; otherwise, it is defined as  the
       empty string and generates no code.

       To  test  if  a given widget belongs to a subclass of an Intrinsics-defined class, the Intrinsics defines macros or functions equivalent to
       XtIsSubclass for each of the built-in classes. These procedures are XtIsObject,	XtIsRectObj,  XtIsWidget,  XtIsComposite,  XtIsConstraint,
       XtIsShell,  XtIsOverrideShell,  XtIsWMShell, XtIsVendorShell, XtIsTransientShell, XtIsTopLevelShell, XtIsApplicationShell, and XtIsSession-
       Shell.

SEE ALSO

       XtAppErrorMsg(3Xt), XtDisplay(3Xt)

       X Toolkit Intrinsics -- C Language Interface

       Xlib -- C Language X Interface

																      XtClass(3Xt)