tk_getanchorfromobj(3tk) [opensolaris man page]

Tk_GetAnchorFromObj(3TK)				       Tk Library Procedures					  Tk_GetAnchorFromObj(3TK)

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NAME

       Tk_GetAnchorFromObj, Tk_GetAnchor, Tk_NameOfAnchor - translate between strings and anchor positions

SYNOPSIS

       #include <tk.h>

       int																	   |
       Tk_GetAnchorFromObj(interp, objPtr, anchorPtr)												   |

       int
       Tk_GetAnchor(interp, string, anchorPtr)

       CONST char *
       Tk_NameOfAnchor(anchor)

ARGUMENTS

       Tcl_Interp  *interp	(in)	  Interpreter to use for error reporting, or NULL.

       Tcl_Obj	   *objPtr	(in/out)													   |
					  String  value contains name of anchor point: n, ne, e, se, s, sw, w, nw, or center; internal rep will be |
					  modified to cache corresponding Tk_Anchor.								   |

       CONST char  *string	(in)														   |
					  Same as objPtr except description of anchor point is passed as a string.

       int	   *anchorPtr	(out)	  Pointer to location in which to store anchor position corresponding to objPtr or string.

       Tk_Anchor   anchor	(in)	  Anchor position, e.g. TCL_ANCHOR_CENTER.
_________________________________________________________________

DESCRIPTION

       Tk_GetAnchorFromObj places in *anchorPtr an anchor position (enumerated type Tk_Anchor) corresponding to objPtr's value.  The  result  will |
       be  one of TK_ANCHOR_N, TK_ANCHOR_NE, TK_ANCHOR_E, TK_ANCHOR_SE, TK_ANCHOR_S, TK_ANCHOR_SW, TK_ANCHOR_W, TK_ANCHOR_NW, or TK_ANCHOR_CENTER. |
       Anchor positions are typically used for indicating a point on an object that will be used to position the object,  e.g.	TK_ANCHOR_N  means |
       position the top center point of the object at a particular place.									   |

       Under normal circumstances the return value is TCL_OK and interp is unused.  If string doesn't contain a valid anchor position or an abbre- |
       viation of one of these names, TCL_ERROR is returned, *anchorPtr is unmodified, and an error message is stored in interp's result if interp |
       isn't  NULL.   Tk_GetAnchorFromObj caches information about the return value in objPtr, which speeds up future calls to Tk_GetAnchorFromObj |
       with the same objPtr.															   |

       Tk_GetAnchor is identical to Tk_GetAnchorFromObj except that the description of the anchor is specified with a string instead of an object. |
       This prevents Tk_GetAnchor from caching the return value, so Tk_GetAnchor is less efficient than Tk_GetAnchorFromObj.

       Tk_NameOfAnchor	is  the  logical  inverse of Tk_GetAnchor.  Given an anchor position such as TK_ANCHOR_N it returns a statically-allocated
       string corresponding to anchor.	If anchor isn't a legal anchor value, then ``unknown anchor position'' is returned.

KEYWORDS

       anchor position

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWTk	      |
       +--------------------+-----------------+
       |Interface Stability | Uncommitted     |
       +--------------------+-----------------+
NOTES

       Source for Tk is available on http://opensolaris.org.

Tk									8.1						  Tk_GetAnchorFromObj(3TK)