Tk_Name(3)						       Tk Library Procedures							Tk_Name(3)

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NAME

       Tk_Name, Tk_PathName, Tk_NameToWindow - convert between names and window tokens

SYNOPSIS

       #include <tk.h>

       Tk_Uid
       Tk_Name(tkwin)

       char *
       Tk_PathName(tkwin)

       Tk_Window
       Tk_NameToWindow(interp, pathName, tkwin)

ARGUMENTS

       Tk_Window tkwin (in)		  Token for window.

       Tcl_Interp *interp (out) 	  Interpreter to use for error reporting.

       const char *pathName (in)	  Character string containing path name of window.
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DESCRIPTION

       Each  window  managed  by  Tk  has two names, a short name that identifies a window among children of the same parent, and a path name that
       identifies the window uniquely among all the windows belonging to the same main window.	The path name is used more often in  Tk  than  the
       short name;  many commands, like bind, expect path names as arguments.

       The  Tk_Name macro returns a window's short name, which is the same as the name argument passed to Tk_CreateWindow when the window was cre-
       ated.  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).

       The  Tk_PathName  macro	returns  a  hierarchical  name for tkwin.  Path names have a structure similar to file names in Unix but with dots
       between elements instead of slashes:  the main window for an application has the path name "."; its children have names like ".a" and ".b";
       their  children have names like ".a.aa" and ".b.bb"; and so on.	A window is considered to be a child of another window for naming purposes
       if the second window was named as the first window's parent when the first window was created.  This is not always the same as the X window
       hierarchy.   For  example,  a  pop-up  is created as a child of the root window, but its logical parent will usually be a window within the
       application.

       The procedure Tk_NameToWindow returns the token for a window given its path name (the pathName argument) and another  window  belonging	to
       the  same  main	window	(tkwin).  It normally returns a token for the named window, but if no such window exists Tk_NameToWindow leaves an
       error message in interp->result and returns NULL.  The tkwin argument to Tk_NameToWindow is needed  because  path  names  are  only  unique
       within  a  single  application  hierarchy.  If, for example, a single process has opened two main windows, each will have a separate naming
       hierarchy and the same path name might appear in each of the hierarchies.  Normally tkwin is the main window of the desired hierarchy,  but
       this need not be the case:  any window in the desired hierarchy may be used.

KEYWORDS

       name, path name, token, window

Tk																	Tk_Name(3)