GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 2.1AS(Slurm) |
|
 |
Tk_GetAnchor(3) |
 |
______________________________________________________________________________
Tk_GetAnchorFromObj, Tk_GetAnchor, Tk_NameOfAnchor − translate between strings and anchor positions
#include <tk.h>
int
│
Tk_GetAnchorFromObj(interp, objPtr,
anchorPtr) │
int
Tk_GetAnchor(interp, string,
anchorPtr)
char *
Tk_NameOfAnchor(anchor)
|
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. │
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. |
_________________________________________________________________
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 │ abbreviation 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.
anchor position
|
Tk_GetAnchor(3) | |