diff options
Diffstat (limited to 'doc/CanvTkwin.3')
| -rw-r--r-- | doc/CanvTkwin.3 | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/doc/CanvTkwin.3 b/doc/CanvTkwin.3 index fb8fff5..14db15e 100644 --- a/doc/CanvTkwin.3 +++ b/doc/CanvTkwin.3 @@ -36,7 +36,7 @@ Tk_OptionPrintProc *\fBTk_CanvasTagsPrintProc\fR; A token that identifies a canvas widget. .AP Tcl_Interp *interp in/out Interpreter to use for error reporting. -.AP "CONST char" *string in +.AP "const char" *string in Textual description of a canvas coordinate. .AP double *doublePtr out Points to place to store a converted coordinate. @@ -85,9 +85,9 @@ coordinate (such as \fB2p\fR or \fB1.6c\fR) into a double-precision canvas coordinate. If \fIstring\fR is a valid coordinate description then \fBTk_CanvasGetCoord\fR stores the corresponding canvas coordinate at *\fIdoublePtr\fR -and returns TCL_OK. +and returns \fBTCL_OK\fR. Otherwise it stores an error message in \fIinterp->result\fR and -returns TCL_ERROR. +returns \fBTCL_ERROR\fR. .PP \fBTk_CanvasDrawableCoords\fR is called by type managers during redisplay to compute where to draw things. @@ -138,20 +138,20 @@ modified using image commands. .PP \fBTk_CanvasTagsParseProc\fR and \fBTk_CanvasTagsPrintProc\fR are procedures that handle the \fB\-tags\fR option for canvas items. -The code of a canvas type manager won't call these procedures +The code of a canvas type manager will not call these procedures directly, but will use their addresses to create a \fBTk_CustomOption\fR structure for the \fB\-tags\fR option. The code typically looks like this: .CS static Tk_CustomOption tagsOption = {Tk_CanvasTagsParseProc, - Tk_CanvasTagsPrintProc, (ClientData) NULL + Tk_CanvasTagsPrintProc, (ClientData) NULL }; static Tk_ConfigSpec configSpecs[] = { - ... - {TK_CONFIG_CUSTOM, "\-tags", (char *) NULL, (char *) NULL, - (char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, - ... + ... + {TK_CONFIG_CUSTOM, "\-tags", (char *) NULL, (char *) NULL, + (char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, + ... }; .CE |