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Diffstat (limited to 'doc/GetAnchor.3')
-rw-r--r-- | doc/GetAnchor.3 | 50 |
1 files changed, 36 insertions, 14 deletions
diff --git a/doc/GetAnchor.3 b/doc/GetAnchor.3 index 4c5cdfb..96ac879 100644 --- a/doc/GetAnchor.3 +++ b/doc/GetAnchor.3 @@ -1,21 +1,26 @@ '\" '\" Copyright (c) 1990 The Regents of the University of California. -'\" Copyright (c) 1994-1996 Sun Microsystems, Inc. +'\" Copyright (c) 1994-1998 Sun Microsystems, Inc. '\" '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" SCCS: @(#) GetAnchor.3 1.9 96/03/26 18:08:45 +'\" SCCS: @(#) GetAnchor.3 1.11 98/01/28 13:00:43 '\" .so man.macros -.TH Tk_GetAnchor 3 "" Tk "Tk Library Procedures" +.TH Tk_GetAnchorFromObj 3 8.1 Tk "Tk Library Procedures" .BS .SH NAME -Tk_GetAnchor, Tk_NameOfAnchor \- translate between strings and anchor positions +Tk_GetAnchorFromObj, Tk_GetAnchor, Tk_NameOfAnchor \- translate between strings and anchor positions .SH SYNOPSIS .nf \fB#include <tk.h>\fR .sp +.VS 8.1 +int +\fBTk_GetAnchorFromObj(\fIinterp, objPtr, anchorPtr\fB)\fR +.VE +.sp int \fBTk_GetAnchor(\fIinterp, string, anchorPtr\fB)\fR .sp @@ -24,35 +29,52 @@ char * .SH ARGUMENTS .AS "Tk_Anchor" *anchorPtr .AP Tcl_Interp *interp in -Interpreter to use for error reporting. +Interpreter to use for error reporting, or NULL. +.VS 8.1 br +.AP Tcl_Obj *objPtr in/out +String value contains name of anchor point: \fBn\fR, \fBne\fR, +\fBe\fR, \fBse\fR, \fBs\fR, \fBsw\fR, \fBw\fR, \fBnw\fR, or \fBcenter\fR; +internal rep will be modified to cache corresponding Tk_Anchor. .AP char *string in -String containing name of anchor point: one of ``n'', ``ne'', ``e'', ``se'', -``s'', ``sw'', ``w'', ``nw'', or ``center''. +Same as \fIobjPtr\fR except description of anchor point is passed as +a string. +.VE .AP int *anchorPtr out Pointer to location in which to store anchor position corresponding to -\fIstring\fR. +\fIobjPtr\fR or \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 +.VS 8.1 +\fBTk_GetAnchorFromObj\fR places in \fI*anchorPtr\fR an anchor position (enumerated type \fBTk_Anchor\fR) -corresponding to \fIstring\fR, which will be one of +corresponding to \fIobjPtr\fR's value. The result 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 +that will be used to position the 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. +or an abbreviation of one of these names, \fBTCL_ERROR\fR is returned, +\fI*anchorPtr\fR is unmodified, and an error message is +stored in \fIinterp\fR's result if \fIinterp\fR isn't NULL. +\fBTk_GetAnchorFromObj\fR caches information about the return +value in \fIobjPtr\fR, which speeds up future calls to +\fBTk_GetAnchorFromObj\fR with the same \fIobjPtr\fR. +.PP +\fBTk_GetAnchor\fR is identical to \fBTk_GetAnchorFromObj\fR except +that the description of the anchor is specified with a string instead +of an object. This prevents \fBTk_GetAnchor\fR from caching the +return value, so \fBTk_GetAnchor\fR is less efficient than +\fBTk_GetAnchorFromObj\fR. +.VE .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 |