Tk_SetClass, Tk_Class — set or retrieve a window's class
#include <tk.h>
Tk_SetClass(tkwin, class)
Tk_Uid
Tk_Class(tkwin)
- Tk_Window tkwin
(in)
- Token for window.
- char *class (in)
- New class name for window.
Tk_SetClass is called to associate a class with a particular
window. The class string identifies the type of the window;
all windows with the same general class of behavior (button, menu,
etc.) should have the same class. By convention all class names
start with a capital letter, and there exists a Tcl command with
the same name as each class (except all in lower-case) which can be
used to create and manipulate windows of that class. A window's
class string is initialized to NULL when the window is created.
For main windows, Tk automatically propagates the name and class
to the WM_CLASS property used by window managers. This happens
either when a main window is actually created (e.g. in Tk_MakeWindowExist), or when
Tk_SetClass is called, whichever occurs later. If a main
window has not been assigned a class then Tk will not set the
WM_CLASS property for the window.
Tk_Class is a macro that returns the current value of
tkwin's class. The value is returned as a Tk_Uid, which may be used just like a
string pointer but also has the properties of a unique identifier
(see the manual entry for Tk_GetUid for details). If
tkwin has not yet been given a class, then Tk_Class
will return NULL.
class, unique identifier,
window, window manager
Copyright © 1990 The Regents of the University of
California.
Copyright © 1994-1996 Sun Microsystems, Inc.