Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Tree: 9e886ff077
Fetching contributors…

Cannot retrieve contributors at this time

1196 lines (1088 sloc) 33.535 kB
/*
* tkUtil.c --
*
* This file contains miscellaneous utility functions that are used by
* the rest of Tk, such as a function for drawing a focus highlight.
*
* Copyright (c) 1994 The Regents of the University of California.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tkInt.h"
/*
* The structure below defines the implementation of the "statekey" Tcl
* object, used for quickly finding a mapping in a TkStateMap.
*/
const Tcl_ObjType tkStateKeyObjType = {
"statekey", /* name */
NULL, /* freeIntRepProc */
NULL, /* dupIntRepProc */
NULL, /* updateStringProc */
NULL /* setFromAnyProc */
};
/*
*--------------------------------------------------------------
*
* TkStateParseProc --
*
* This function is invoked during option processing to handle the
* "-state" and "-default" options.
*
* Results:
* A standard Tcl return value.
*
* Side effects:
* The state for a given item gets replaced by the state indicated in the
* value argument.
*
*--------------------------------------------------------------
*/
int
TkStateParseProc(
ClientData clientData, /* some flags.*/
Tcl_Interp *interp, /* Used for reporting errors. */
Tk_Window tkwin, /* Window containing canvas widget. */
const char *value, /* Value of option. */
char *widgRec, /* Pointer to record for item. */
int offset) /* Offset into item. */
{
int c;
int flags = PTR2INT(clientData);
size_t length;
Tcl_Obj *msgObj;
register Tk_State *statePtr = (Tk_State *) (widgRec + offset);
if (value == NULL || *value == 0) {
*statePtr = TK_STATE_NULL;
return TCL_OK;
}
c = value[0];
length = strlen(value);
if ((c == 'n') && (strncmp(value, "normal", length) == 0)) {
*statePtr = TK_STATE_NORMAL;
return TCL_OK;
}
if ((c == 'd') && (strncmp(value, "disabled", length) == 0)) {
*statePtr = TK_STATE_DISABLED;
return TCL_OK;
}
if ((c == 'a') && (flags&1) && (strncmp(value, "active", length) == 0)) {
*statePtr = TK_STATE_ACTIVE;
return TCL_OK;
}
if ((c == 'h') && (flags&2) && (strncmp(value, "hidden", length) == 0)) {
*statePtr = TK_STATE_HIDDEN;
return TCL_OK;
}
msgObj = Tcl_ObjPrintf("bad %s value \"%s\": must be normal",
((flags & 4) ? "-default" : "state"), value);
if (flags & 1) {
Tcl_AppendToObj(msgObj, ", active", -1);
}
if (flags & 2) {
Tcl_AppendToObj(msgObj, ", hidden", -1);
}
if (flags & 3) {
Tcl_AppendToObj(msgObj, ",", -1);
}
Tcl_AppendToObj(msgObj, " or disabled", -1);
Tcl_SetObjResult(interp, msgObj);
Tcl_SetErrorCode(interp, "TK", "VALUE", "STATE", NULL);
*statePtr = TK_STATE_NORMAL;
return TCL_ERROR;
}
/*
*--------------------------------------------------------------
*
* TkStatePrintProc --
*
* This function is invoked by the Tk configuration code to produce a
* printable string for the "-state" configuration option.
*
* Results:
* The return value is a string describing the state for the item
* referred to by "widgRec". In addition, *freeProcPtr is filled in with
* the address of a function to call to free the result string when it's
* no longer needed (or NULL to indicate that the string doesn't need to
* be freed).
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
const char *
TkStatePrintProc(
ClientData clientData, /* Ignored. */
Tk_Window tkwin, /* Window containing canvas widget. */
char *widgRec, /* Pointer to record for item. */
int offset, /* Offset into item. */
Tcl_FreeProc **freeProcPtr) /* Pointer to variable to fill in with
* information about how to reclaim storage
* for return string. */
{
register Tk_State *statePtr = (Tk_State *) (widgRec + offset);
switch (*statePtr) {
case TK_STATE_NORMAL:
return "normal";
case TK_STATE_DISABLED:
return "disabled";
case TK_STATE_HIDDEN:
return "hidden";
case TK_STATE_ACTIVE:
return "active";
default:
return "";
}
}
/*
*--------------------------------------------------------------
*
* TkOrientParseProc --
*
* This function is invoked during option processing to handle the
* "-orient" option.
*
* Results:
* A standard Tcl return value.
*
* Side effects:
* The orientation for a given item gets replaced by the orientation
* indicated in the value argument.
*
*--------------------------------------------------------------
*/
int
TkOrientParseProc(
ClientData clientData, /* some flags.*/
Tcl_Interp *interp, /* Used for reporting errors. */
Tk_Window tkwin, /* Window containing canvas widget. */
const char *value, /* Value of option. */
char *widgRec, /* Pointer to record for item. */
int offset) /* Offset into item. */
{
int c;
size_t length;
register int *orientPtr = (int *) (widgRec + offset);
if (value == NULL || *value == 0) {
*orientPtr = 0;
return TCL_OK;
}
c = value[0];
length = strlen(value);
if ((c == 'h') && (strncmp(value, "horizontal", length) == 0)) {
*orientPtr = 0;
return TCL_OK;
}
if ((c == 'v') && (strncmp(value, "vertical", length) == 0)) {
*orientPtr = 1;
return TCL_OK;
}
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad orientation \"%s\": must be vertical or horizontal",
value));
Tcl_SetErrorCode(interp, "TK", "VALUE", "ORIENTATION", NULL);
*orientPtr = 0;
return TCL_ERROR;
}
/*
*--------------------------------------------------------------
*
* TkOrientPrintProc --
*
* This function is invoked by the Tk configuration code to produce a
* printable string for the "-orient" configuration option.
*
* Results:
* The return value is a string describing the orientation for the item
* referred to by "widgRec". In addition, *freeProcPtr is filled in with
* the address of a function to call to free the result string when it's
* no longer needed (or NULL to indicate that the string doesn't need to
* be freed).
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
const char *
TkOrientPrintProc(
ClientData clientData, /* Ignored. */
Tk_Window tkwin, /* Window containing canvas widget. */
char *widgRec, /* Pointer to record for item. */
int offset, /* Offset into item. */
Tcl_FreeProc **freeProcPtr) /* Pointer to variable to fill in with
* information about how to reclaim storage
* for return string. */
{
register int *statePtr = (int *) (widgRec + offset);
if (*statePtr) {
return "vertical";
} else {
return "horizontal";
}
}
/*
*----------------------------------------------------------------------
*
* TkOffsetParseProc --
*
* Converts the offset of a stipple or tile into the Tk_TSOffset
* structure.
*
*----------------------------------------------------------------------
*/
int
TkOffsetParseProc(
ClientData clientData, /* not used */
Tcl_Interp *interp, /* Interpreter to send results back to */
Tk_Window tkwin, /* Window on same display as tile */
const char *value, /* Name of image */
char *widgRec, /* Widget structure record */
int offset) /* Offset of tile in record */
{
Tk_TSOffset *offsetPtr = (Tk_TSOffset *) (widgRec + offset);
Tk_TSOffset tsoffset;
const char *q, *p;
int result;
Tcl_Obj *msgObj;
if ((value == NULL) || (*value == 0)) {
tsoffset.flags = TK_OFFSET_CENTER|TK_OFFSET_MIDDLE;
goto goodTSOffset;
}
tsoffset.flags = 0;
p = value;
switch (value[0]) {
case '#':
if (PTR2INT(clientData) & TK_OFFSET_RELATIVE) {
tsoffset.flags = TK_OFFSET_RELATIVE;
p++;
break;
}
goto badTSOffset;
case 'e':
switch(value[1]) {
case '\0':
tsoffset.flags = TK_OFFSET_RIGHT|TK_OFFSET_MIDDLE;
goto goodTSOffset;
case 'n':
if (value[2]!='d' || value[3]!='\0') {
goto badTSOffset;
}
tsoffset.flags = INT_MAX;
goto goodTSOffset;
}
case 'w':
if (value[1] != '\0') {goto badTSOffset;}
tsoffset.flags = TK_OFFSET_LEFT|TK_OFFSET_MIDDLE;
goto goodTSOffset;
case 'n':
if ((value[1] != '\0') && (value[2] != '\0')) {
goto badTSOffset;
}
switch(value[1]) {
case '\0':
tsoffset.flags = TK_OFFSET_CENTER|TK_OFFSET_TOP;
goto goodTSOffset;
case 'w':
tsoffset.flags = TK_OFFSET_LEFT|TK_OFFSET_TOP;
goto goodTSOffset;
case 'e':
tsoffset.flags = TK_OFFSET_RIGHT|TK_OFFSET_TOP;
goto goodTSOffset;
}
goto badTSOffset;
case 's':
if ((value[1] != '\0') && (value[2] != '\0')) {
goto badTSOffset;
}
switch(value[1]) {
case '\0':
tsoffset.flags = TK_OFFSET_CENTER|TK_OFFSET_BOTTOM;
goto goodTSOffset;
case 'w':
tsoffset.flags = TK_OFFSET_LEFT|TK_OFFSET_BOTTOM;
goto goodTSOffset;
case 'e':
tsoffset.flags = TK_OFFSET_RIGHT|TK_OFFSET_BOTTOM;
goto goodTSOffset;
}
goto badTSOffset;
case 'c':
if (strncmp(value, "center", strlen(value)) != 0) {
goto badTSOffset;
}
tsoffset.flags = TK_OFFSET_CENTER|TK_OFFSET_MIDDLE;
goto goodTSOffset;
}
/*
* Check for an extra offset.
*/
q = strchr(p, ',');
if (q == NULL) {
if (PTR2INT(clientData) & TK_OFFSET_INDEX) {
if (Tcl_GetInt(interp, (char *) p, &tsoffset.flags) != TCL_OK) {
Tcl_ResetResult(interp);
goto badTSOffset;
}
tsoffset.flags |= TK_OFFSET_INDEX;
goto goodTSOffset;
}
goto badTSOffset;
}
*((char *) q) = 0;
result = Tk_GetPixels(interp, tkwin, (char *) p, &tsoffset.xoffset);
*((char *) q) = ',';
if (result != TCL_OK) {
return TCL_ERROR;
}
if (Tk_GetPixels(interp, tkwin, (char*)q+1, &tsoffset.yoffset) != TCL_OK) {
return TCL_ERROR;
}
/*
* Below is a hack to allow the stipple/tile offset to be stored in the
* internal tile structure. Most of the times, offsetPtr is a pointer to
* an already existing tile structure. However if this structure is not
* already created, we must do it with Tk_GetTile()!!!!
*/
goodTSOffset:
memcpy(offsetPtr, &tsoffset, sizeof(Tk_TSOffset));
return TCL_OK;
badTSOffset:
msgObj = Tcl_ObjPrintf("bad offset \"%s\": expected \"x,y\"", value);
if (PTR2INT(clientData) & TK_OFFSET_RELATIVE) {
Tcl_AppendToObj(msgObj, ", \"#x,y\"", -1);
}
if (PTR2INT(clientData) & TK_OFFSET_INDEX) {
Tcl_AppendToObj(msgObj, ", <index>", -1);
}
Tcl_AppendToObj(msgObj, ", n, ne, e, se, s, sw, w, nw, or center", -1);
Tcl_SetObjResult(interp, msgObj);
Tcl_SetErrorCode(interp, "TK", "VALUE", "OFFSET", NULL);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* TkOffsetPrintProc --
*
* Returns the offset of the tile.
*
* Results:
* The offset of the tile is returned.
*
*----------------------------------------------------------------------
*/
const char *
TkOffsetPrintProc(
ClientData clientData, /* not used */
Tk_Window tkwin, /* not used */
char *widgRec, /* Widget structure record */
int offset, /* Offset of tile in record */
Tcl_FreeProc **freeProcPtr) /* not used */
{
Tk_TSOffset *offsetPtr = (Tk_TSOffset *) (widgRec + offset);
char *p, *q;
if (offsetPtr->flags & TK_OFFSET_INDEX) {
if (offsetPtr->flags >= INT_MAX) {
return "end";
}
p = ckalloc(32);
sprintf(p, "%d", offsetPtr->flags & ~TK_OFFSET_INDEX);
*freeProcPtr = TCL_DYNAMIC;
return p;
}
if (offsetPtr->flags & TK_OFFSET_TOP) {
if (offsetPtr->flags & TK_OFFSET_LEFT) {
return "nw";
} else if (offsetPtr->flags & TK_OFFSET_CENTER) {
return "n";
} else if (offsetPtr->flags & TK_OFFSET_RIGHT) {
return "ne";
}
} else if (offsetPtr->flags & TK_OFFSET_MIDDLE) {
if (offsetPtr->flags & TK_OFFSET_LEFT) {
return "w";
} else if (offsetPtr->flags & TK_OFFSET_CENTER) {
return "center";
} else if (offsetPtr->flags & TK_OFFSET_RIGHT) {
return "e";
}
} else if (offsetPtr->flags & TK_OFFSET_BOTTOM) {
if (offsetPtr->flags & TK_OFFSET_LEFT) {
return "sw";
} else if (offsetPtr->flags & TK_OFFSET_CENTER) {
return "s";
} else if (offsetPtr->flags & TK_OFFSET_RIGHT) {
return "se";
}
}
q = p = ckalloc(32);
if (offsetPtr->flags & TK_OFFSET_RELATIVE) {
*q++ = '#';
}
sprintf(q, "%d,%d", offsetPtr->xoffset, offsetPtr->yoffset);
*freeProcPtr = TCL_DYNAMIC;
return p;
}
/*
*----------------------------------------------------------------------
*
* TkPixelParseProc --
*
* Converts the name of an image into a tile.
*
*----------------------------------------------------------------------
*/
int
TkPixelParseProc(
ClientData clientData, /* If non-NULL, negative values are allowed as
* well. */
Tcl_Interp *interp, /* Interpreter to send results back to */
Tk_Window tkwin, /* Window on same display as tile */
const char *value, /* Name of image */
char *widgRec, /* Widget structure record */
int offset) /* Offset of tile in record */
{
double *doublePtr = (double *) (widgRec + offset);
int result;
result = TkGetDoublePixels(interp, tkwin, value, doublePtr);
if ((result == TCL_OK) && (clientData == NULL) && (*doublePtr < 0.0)) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad screen distance \"%s\"", value));
Tcl_SetErrorCode(interp, "TK", "VALUE", "PIXELS", NULL);
return TCL_ERROR;
}
return result;
}
/*
*----------------------------------------------------------------------
*
* TkPixelPrintProc --
*
* Returns the name of the tile.
*
* Results:
* The name of the tile is returned.
*
*----------------------------------------------------------------------
*/
const char *
TkPixelPrintProc(
ClientData clientData, /* not used */
Tk_Window tkwin, /* not used */
char *widgRec, /* Widget structure record */
int offset, /* Offset of tile in record */
Tcl_FreeProc **freeProcPtr) /* not used */
{
double *doublePtr = (double *) (widgRec + offset);
char *p = ckalloc(24);
Tcl_PrintDouble(NULL, *doublePtr, p);
*freeProcPtr = TCL_DYNAMIC;
return p;
}
/*
*----------------------------------------------------------------------
*
* TkDrawInsetFocusHighlight --
*
* This function draws a rectangular ring around the outside of a widget
* to indicate that it has received the input focus. It takes an
* additional padding argument that specifies how much padding is present
* outside the widget.
*
* Results:
* None.
*
* Side effects:
* A rectangle "width" pixels wide is drawn in "drawable", corresponding
* to the outer area of "tkwin".
*
*----------------------------------------------------------------------
*/
void
TkDrawInsetFocusHighlight(
Tk_Window tkwin, /* Window whose focus highlight ring is to be
* drawn. */
GC gc, /* Graphics context to use for drawing the
* highlight ring. */
int width, /* Width of the highlight ring, in pixels. */
Drawable drawable, /* Where to draw the ring (typically a pixmap
* for double buffering). */
int padding) /* Width of padding outside of widget. */
{
XRectangle rects[4];
rects[0].x = padding;
rects[0].y = padding;
rects[0].width = Tk_Width(tkwin) - (2 * padding);
rects[0].height = width;
rects[1].x = padding;
rects[1].y = Tk_Height(tkwin) - width - padding;
rects[1].width = Tk_Width(tkwin) - (2 * padding);
rects[1].height = width;
rects[2].x = padding;
rects[2].y = width + padding;
rects[2].width = width;
rects[2].height = Tk_Height(tkwin) - 2*width - 2*padding;
rects[3].x = Tk_Width(tkwin) - width - padding;
rects[3].y = rects[2].y;
rects[3].width = width;
rects[3].height = rects[2].height;
XFillRectangles(Tk_Display(tkwin), drawable, gc, rects, 4);
}
/*
*----------------------------------------------------------------------
*
* Tk_DrawFocusHighlight --
*
* This function draws a rectangular ring around the outside of a widget
* to indicate that it has received the input focus.
*
* This function is now deprecated. Use TkpDrawHighlightBorder instead,
* since this function does not handle drawing the Focus ring properly on
* the Macintosh - you need to know the background GC as well as the
* foreground since the Mac focus ring separated from the widget by a 1
* pixel border.
*
* Results:
* None.
*
* Side effects:
* A rectangle "width" pixels wide is drawn in "drawable", corresponding
* to the outer area of "tkwin".
*
*----------------------------------------------------------------------
*/
void
Tk_DrawFocusHighlight(
Tk_Window tkwin, /* Window whose focus highlight ring is to be
* drawn. */
GC gc, /* Graphics context to use for drawing the
* highlight ring. */
int width, /* Width of the highlight ring, in pixels. */
Drawable drawable) /* Where to draw the ring (typically a pixmap
* for double buffering). */
{
TkDrawInsetFocusHighlight(tkwin, gc, width, drawable, 0);
}
/*
*----------------------------------------------------------------------
*
* Tk_GetScrollInfo --
*
* This function is invoked to parse "xview" and "yview" scrolling
* commands for widgets using the new scrolling command syntax ("moveto"
* or "scroll" options).
*
* Results:
* The return value is either TK_SCROLL_MOVETO, TK_SCROLL_PAGES,
* TK_SCROLL_UNITS, or TK_SCROLL_ERROR. This indicates whether the
* command was successfully parsed and what form the command took. If
* TK_SCROLL_MOVETO, *dblPtr is filled in with the desired position; if
* TK_SCROLL_PAGES or TK_SCROLL_UNITS, *intPtr is filled in with the
* number of lines to move (may be negative); if TK_SCROLL_ERROR, the
* interp's result contains an error message.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
Tk_GetScrollInfo(
Tcl_Interp *interp, /* Used for error reporting. */
int argc, /* # arguments for command. */
const char **argv, /* Arguments for command. */
double *dblPtr, /* Filled in with argument "moveto" option, if
* any. */
int *intPtr) /* Filled in with number of pages or lines to
* scroll, if any. */
{
int c = argv[2][0];
size_t length = strlen(argv[2]);
if ((c == 'm') && (strncmp(argv[2], "moveto", length) == 0)) {
if (argc != 4) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"wrong # args: should be \"%s %s %s\"",
argv[0], argv[1], "moveto fraction"));
Tcl_SetErrorCode(interp, "TCL", "WRONGARGS", NULL);
return TK_SCROLL_ERROR;
}
if (Tcl_GetDouble(interp, argv[3], dblPtr) != TCL_OK) {
return TK_SCROLL_ERROR;
}
return TK_SCROLL_MOVETO;
} else if ((c == 's')
&& (strncmp(argv[2], "scroll", length) == 0)) {
if (argc != 5) {
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"wrong # args: should be \"%s %s %s\"",
argv[0], argv[1], "scroll number units|pages"));
Tcl_SetErrorCode(interp, "TCL", "WRONGARGS", NULL);
return TK_SCROLL_ERROR;
}
if (Tcl_GetInt(interp, argv[3], intPtr) != TCL_OK) {
return TK_SCROLL_ERROR;
}
length = strlen(argv[4]);
c = argv[4][0];
if ((c == 'p') && (strncmp(argv[4], "pages", length) == 0)) {
return TK_SCROLL_PAGES;
} else if ((c == 'u') && (strncmp(argv[4], "units", length) == 0)) {
return TK_SCROLL_UNITS;
}
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad argument \"%s\": must be units or pages", argv[4]));
Tcl_SetErrorCode(interp, "TK", "VALUE", "SCROLL_UNITS", NULL);
return TK_SCROLL_ERROR;
}
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"unknown option \"%s\": must be moveto or scroll", argv[2]));
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "INDEX", "option", argv[2],
NULL);
return TK_SCROLL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* Tk_GetScrollInfoObj --
*
* This function is invoked to parse "xview" and "yview" scrolling
* commands for widgets using the new scrolling command syntax ("moveto"
* or "scroll" options).
*
* Results:
* The return value is either TK_SCROLL_MOVETO, TK_SCROLL_PAGES,
* TK_SCROLL_UNITS, or TK_SCROLL_ERROR. This indicates whether the
* command was successfully parsed and what form the command took. If
* TK_SCROLL_MOVETO, *dblPtr is filled in with the desired position; if
* TK_SCROLL_PAGES or TK_SCROLL_UNITS, *intPtr is filled in with the
* number of lines to move (may be negative); if TK_SCROLL_ERROR, the
* interp's result contains an error message.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
Tk_GetScrollInfoObj(
Tcl_Interp *interp, /* Used for error reporting. */
int objc, /* # arguments for command. */
Tcl_Obj *const objv[], /* Arguments for command. */
double *dblPtr, /* Filled in with argument "moveto" option, if
* any. */
int *intPtr) /* Filled in with number of pages or lines to
* scroll, if any. */
{
int length;
const char *arg = Tcl_GetStringFromObj(objv[2], &length);
#define ArgPfxEq(str) \
((arg[0] == str[0]) && !strncmp(arg, str, (unsigned)length))
if (ArgPfxEq("moveto")) {
if (objc != 4) {
Tcl_WrongNumArgs(interp, 2, objv, "moveto fraction");
return TK_SCROLL_ERROR;
}
if (Tcl_GetDoubleFromObj(interp, objv[3], dblPtr) != TCL_OK) {
return TK_SCROLL_ERROR;
}
return TK_SCROLL_MOVETO;
} else if (ArgPfxEq("scroll")) {
if (objc != 5) {
Tcl_WrongNumArgs(interp, 2, objv, "scroll number units|pages");
return TK_SCROLL_ERROR;
}
if (Tcl_GetIntFromObj(interp, objv[3], intPtr) != TCL_OK) {
return TK_SCROLL_ERROR;
}
arg = Tcl_GetStringFromObj(objv[4], &length);
if (ArgPfxEq("pages")) {
return TK_SCROLL_PAGES;
} else if (ArgPfxEq("units")) {
return TK_SCROLL_UNITS;
}
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"bad argument \"%s\": must be units or pages", arg));
Tcl_SetErrorCode(interp, "TK", "VALUE", "SCROLL_UNITS", NULL);
return TK_SCROLL_ERROR;
}
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
"unknown option \"%s\": must be moveto or scroll", arg));
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "INDEX", "option", arg, NULL);
return TK_SCROLL_ERROR;
}
/*
*---------------------------------------------------------------------------
*
* TkComputeAnchor --
*
* Determine where to place a rectangle so that it will be properly
* anchored with respect to the given window. Used by widgets to align a
* box of text inside a window. When anchoring with respect to one of the
* sides, the rectangle be placed inside of the internal border of the
* window.
*
* Results:
* *xPtr and *yPtr set to the upper-left corner of the rectangle anchored
* in the window.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
void
TkComputeAnchor(
Tk_Anchor anchor, /* Desired anchor. */
Tk_Window tkwin, /* Anchored with respect to this window. */
int padX, int padY, /* Use this extra padding inside window, in
* addition to the internal border. */
int innerWidth, int innerHeight,
/* Size of rectangle to anchor in window. */
int *xPtr, int *yPtr) /* Returns upper-left corner of anchored
* rectangle. */
{
/*
* Handle the horizontal parts.
*/
switch (anchor) {
case TK_ANCHOR_NW:
case TK_ANCHOR_W:
case TK_ANCHOR_SW:
*xPtr = Tk_InternalBorderLeft(tkwin) + padX;
break;
case TK_ANCHOR_N:
case TK_ANCHOR_CENTER:
case TK_ANCHOR_S:
*xPtr = (Tk_Width(tkwin) - innerWidth - Tk_InternalBorderLeft(tkwin) -
Tk_InternalBorderRight(tkwin)) / 2 +
Tk_InternalBorderLeft(tkwin);
break;
default:
*xPtr = Tk_Width(tkwin) - Tk_InternalBorderRight(tkwin) - padX
- innerWidth;
break;
}
/*
* Handle the vertical parts.
*/
switch (anchor) {
case TK_ANCHOR_NW:
case TK_ANCHOR_N:
case TK_ANCHOR_NE:
*yPtr = Tk_InternalBorderTop(tkwin) + padY;
break;
case TK_ANCHOR_W:
case TK_ANCHOR_CENTER:
case TK_ANCHOR_E:
*yPtr = (Tk_Height(tkwin) - innerHeight- Tk_InternalBorderTop(tkwin) -
Tk_InternalBorderBottom(tkwin)) / 2 +
Tk_InternalBorderTop(tkwin);
break;
default:
*yPtr = Tk_Height(tkwin) - Tk_InternalBorderBottom(tkwin) - padY
- innerHeight;
break;
}
}
/*
*---------------------------------------------------------------------------
*
* TkFindStateString --
*
* Given a lookup table, map a number to a string in the table.
*
* Results:
* If numKey was equal to the numeric key of one of the elements in the
* table, returns the string key of that element. Returns NULL if numKey
* was not equal to any of the numeric keys in the table.
*
* Side effects.
* None.
*
*---------------------------------------------------------------------------
*/
const char *
TkFindStateString(
const TkStateMap *mapPtr, /* The state table. */
int numKey) /* The key to try to find in the table. */
{
for (; mapPtr->strKey!=NULL ; mapPtr++) {
if (numKey == mapPtr->numKey) {
return mapPtr->strKey;
}
}
return NULL;
}
/*
*---------------------------------------------------------------------------
*
* TkFindStateNum, TkFindStateNumObj --
*
* Given a lookup table, map a string to a number in the table.
*
* Results:
* If strKey was equal to the string keys of one of the elements in the
* table, returns the numeric key of that element. Returns the numKey
* associated with the last element (the NULL string one) in the table if
* strKey was not equal to any of the string keys in the table. In that
* case, an error message is also left in the interp's result (if interp
* is not NULL).
*
* Side effects.
* None.
*
*---------------------------------------------------------------------------
*/
int
TkFindStateNum(
Tcl_Interp *interp, /* Interp for error reporting. */
const char *option, /* String to use when constructing error. */
const TkStateMap *mapPtr, /* Lookup table. */
const char *strKey) /* String to try to find in lookup table. */
{
const TkStateMap *mPtr;
/*
* See if the value is in the state map.
*/
for (mPtr = mapPtr; mPtr->strKey != NULL; mPtr++) {
if (strcmp(strKey, mPtr->strKey) == 0) {
return mPtr->numKey;
}
}
/*
* Not there. Generate an error message (if we can) and return the
* default.
*/
if (interp != NULL) {
Tcl_Obj *msgObj;
mPtr = mapPtr;
msgObj = Tcl_ObjPrintf("bad %s value \"%s\": must be %s",
option, strKey, mPtr->strKey);
for (mPtr++; mPtr->strKey != NULL; mPtr++) {
Tcl_AppendPrintfToObj(msgObj, ",%s %s",
((mPtr[1].strKey != NULL) ? "" : "or "), mPtr->strKey);
}
Tcl_SetObjResult(interp, msgObj);
Tcl_SetErrorCode(interp, "TK", "LOOKUP", option, strKey, NULL);
}
return mPtr->numKey;
}
int
TkFindStateNumObj(
Tcl_Interp *interp, /* Interp for error reporting. */
Tcl_Obj *optionPtr, /* String to use when constructing error. */
const TkStateMap *mapPtr, /* Lookup table. */
Tcl_Obj *keyPtr) /* String key to find in lookup table. */
{
const TkStateMap *mPtr;
const char *key;
const Tcl_ObjType *typePtr;
/*
* See if the value is in the object cache.
*/
if ((keyPtr->typePtr == &tkStateKeyObjType)
&& (keyPtr->internalRep.twoPtrValue.ptr1 == mapPtr)) {
return PTR2INT(keyPtr->internalRep.twoPtrValue.ptr2);
}
/*
* Not there. Look in the state map.
*/
key = Tcl_GetStringFromObj(keyPtr, NULL);
for (mPtr = mapPtr; mPtr->strKey != NULL; mPtr++) {
if (strcmp(key, mPtr->strKey) == 0) {
typePtr = keyPtr->typePtr;
if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) {
typePtr->freeIntRepProc(keyPtr);
}
keyPtr->internalRep.twoPtrValue.ptr1 = (void *) mapPtr;
keyPtr->internalRep.twoPtrValue.ptr2 = INT2PTR(mPtr->numKey);
keyPtr->typePtr = &tkStateKeyObjType;
return mPtr->numKey;
}
}
/*
* Not there either. Generate an error message (if we can) and return the
* default.
*/
if (interp != NULL) {
Tcl_Obj *msgObj;
mPtr = mapPtr;
msgObj = Tcl_ObjPrintf(
"bad %s value \"%s\": must be %s",
Tcl_GetString(optionPtr), key, mPtr->strKey);
for (mPtr++; mPtr->strKey != NULL; mPtr++) {
Tcl_AppendPrintfToObj(msgObj, ",%s %s",
((mPtr[1].strKey != NULL) ? "" : " or"), mPtr->strKey);
}
Tcl_SetObjResult(interp, msgObj);
Tcl_SetErrorCode(interp, "TK", "LOOKUP", Tcl_GetString(optionPtr),
key, NULL);
}
return mPtr->numKey;
}
/*
* ----------------------------------------------------------------------
*
* TkBackgroundEvalObjv --
*
* Evaluate a command while ensuring that we do not affect the
* interpreters state. This is important when evaluating script
* during background tasks.
*
* Results:
* A standard Tcl result code.
*
* Side Effects:
* The interpreters variables and code may be modified by the script
* but the result will not be modified.
*
* ----------------------------------------------------------------------
*/
int
TkBackgroundEvalObjv(
Tcl_Interp *interp,
int objc,
Tcl_Obj *const *objv,
int flags)
{
Tcl_InterpState state;
int n, r = TCL_OK;
/*
* Record the state of the interpreter.
*/
Tcl_Preserve(interp);
state = Tcl_SaveInterpState(interp, TCL_OK);
/*
* Evaluate the command and handle any error.
*/
for (n = 0; n < objc; ++n) {
Tcl_IncrRefCount(objv[n]);
}
r = Tcl_EvalObjv(interp, objc, objv, flags);
for (n = 0; n < objc; ++n) {
Tcl_DecrRefCount(objv[n]);
}
if (r == TCL_ERROR) {
Tcl_AddErrorInfo(interp, "\n (background event handler)");
Tcl_BackgroundException(interp, r);
}
/*
* Restore the state of the interpreter.
*/
(void) Tcl_RestoreInterpState(interp, state);
Tcl_Release(interp);
return r;
}
/*
*----------------------------------------------------------------------
*
* TkMakeEnsemble --
*
* Create an ensemble from a table of implementation commands. This may
* be called recursively to create sub-ensembles.
*
* Results:
* Handle for the ensemble, or NULL if creation of it fails.
*
*----------------------------------------------------------------------
*/
Tcl_Command
TkMakeEnsemble(
Tcl_Interp *interp,
const char *namespace,
const char *name,
ClientData clientData,
const TkEnsemble map[])
{
Tcl_Namespace *namespacePtr = NULL;
Tcl_Command ensemble = NULL;
Tcl_Obj *dictObj = NULL, *nameObj;
Tcl_DString ds;
int i;
if (map == NULL) {
return NULL;
}
Tcl_DStringInit(&ds);
namespacePtr = Tcl_FindNamespace(interp, namespace, NULL, 0);
if (namespacePtr == NULL) {
namespacePtr = Tcl_CreateNamespace(interp, namespace, NULL, NULL);
if (namespacePtr == NULL) {
Tcl_Panic("failed to create namespace \"%s\"", namespace);
}
}
nameObj = Tcl_NewStringObj(name, -1);
ensemble = Tcl_FindEnsemble(interp, nameObj, 0);
Tcl_DecrRefCount(nameObj);
if (ensemble == NULL) {
ensemble = Tcl_CreateEnsemble(interp, name, namespacePtr,
TCL_ENSEMBLE_PREFIX);
if (ensemble == NULL) {
Tcl_Panic("failed to create ensemble \"%s\"", name);
}
}
Tcl_DStringSetLength(&ds, 0);
Tcl_DStringAppend(&ds, namespace, -1);
if (!(strlen(namespace) == 2 && namespace[1] == ':')) {
Tcl_DStringAppend(&ds, "::", -1);
}
Tcl_DStringAppend(&ds, name, -1);
dictObj = Tcl_NewObj();
for (i = 0; map[i].name != NULL ; ++i) {
Tcl_Obj *nameObj, *fqdnObj;
nameObj = Tcl_NewStringObj(map[i].name, -1);
fqdnObj = Tcl_NewStringObj(Tcl_DStringValue(&ds),
Tcl_DStringLength(&ds));
Tcl_AppendStringsToObj(fqdnObj, "::", map[i].name, NULL);
Tcl_DictObjPut(NULL, dictObj, nameObj, fqdnObj);
if (map[i].proc) {
Tcl_CreateObjCommand(interp, Tcl_GetString(fqdnObj),
map[i].proc, clientData, NULL);
} else if (map[i].subensemble) {
TkMakeEnsemble(interp, Tcl_DStringValue(&ds),
map[i].name, clientData, map[i].subensemble);
}
}
if (ensemble) {
Tcl_SetEnsembleMappingDict(interp, ensemble, dictObj);
}
Tcl_DStringFree(&ds);
return ensemble;
}
/*
*----------------------------------------------------------------------
*
* TkSendVirtualEvent --
*
* Send a virtual event notification to the specified target window.
* Equivalent to "event generate $target <<$eventName>>"
*
* Note that we use Tk_QueueWindowEvent, not Tk_HandleEvent, so this
* routine does not reenter the interpreter.
*
*----------------------------------------------------------------------
*/
void
TkSendVirtualEvent(
Tk_Window target,
const char *eventName)
{
union {XEvent general; XVirtualEvent virtual;} event;
memset(&event, 0, sizeof(event));
event.general.xany.type = VirtualEvent;
event.general.xany.serial = NextRequest(Tk_Display(target));
event.general.xany.send_event = False;
event.general.xany.window = Tk_WindowId(target);
event.general.xany.display = Tk_Display(target);
event.virtual.name = Tk_GetUid(eventName);
Tk_QueueWindowEvent(&event.general, TCL_QUEUE_TAIL);
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
Jump to Line
Something went wrong with that request. Please try again.