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- '\" $Header: /user6/ouster/wish/man/RCS/GetAnchor.3,v 1.4 93/04/01 09:41:23 ouster Exp $ SPRITE (Berkeley)
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- .so man.macros
- .HS Tk_GetAnchor tkc
- .BS
- .SH NAME
- Tk_GetAnchor, Tk_NameOfAnchor \- translate between strings and anchor positions
- .SH SYNOPSIS
- .nf
- \fB#include <tk.h>\fR
- .sp
- Tk_Anchor
- \fBTk_GetAnchor(\fIinterp, string, anchorPtr\fB)\fR
- .sp
- char *
- \fBTk_NameOfAnchor(\fIanchor\fB)\fR
- .SH ARGUMENTS
- .AS "Tk_Anchor" *anchorPtr
- .AP Tcl_Interp *interp in
- Interpreter to use for error reporting.
- .AP char *string in
- String containing name of anchor point: one of ``n'', ``ne'', ``e'', ``se'',
- ``s'', ``sw'', ``w'', ``nw'', or ``center''.
- .AP int *anchorPtr out
- Pointer to location in which to store anchor position corresponding to
- \fIstring\fR.
- .AP Tk_Anchor anchor in
- Anchor position, e.g. \fBTCL_ANCHOR_CENTER\fR.
- .BE
-
- .SH DESCRIPTION
- .PP
- \fBTk_GetAnchor\fR places in \fI*anchorPtr\fR an anchor position
- (enumerated type \fBTk_Anchor\fR)
- corresponding to \fIstring\fR, which will be one of
- \fBTK_ANCHOR_N\fR, \fBTK_ANCHOR_NE\fR, \fBTK_ANCHOR_E\fR, \fBTK_ANCHOR_SE\fR,
- \fBTK_ANCHOR_S\fR, \fBTK_ANCHOR_SW\fR, \fBTK_ANCHOR_W\fR, \fBTK_ANCHOR_NW\fR,
- or \fBTK_ANCHOR_CENTER\fR.
- Anchor positions are typically used for indicating a point on an object
- that will be used to position that object, e.g. \fBTK_ANCHOR_N\fR means
- position the top center point of the object at a particular place.
- .PP
- Under normal circumstances the return value is \fBTCL_OK\fR and
- \fIinterp\fR is unused.
- If \fIstring\fR doesn't contain a valid anchor position
- or an abbreviation of one of these names, then an error message is
- stored in \fIinterp->result\fR, \fBTCL_ERROR\fR is returned, and
- \fI*anchorPtr\fR is unmodified.
- .PP
- \fBTk_NameOfAnchor\fR is the logical inverse of \fBTk_GetAnchor\fR.
- Given an anchor position such as \fBTK_ANCHOR_N\fR it returns a
- statically-allocated string corresponding to \fIanchor\fR.
- If \fIanchor\fR isn't a legal anchor value, then
- ``unknown anchor position'' is returned.
-
- .SH KEYWORDS
- anchor position
-