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Annotation of researchv9/X11/src/X.V11R1/lib/oldXtk/Form.c, revision 1.1

1.1     ! root        1: /* $Header: Form.c,v 1.1 87/09/11 07:58:23 toddb Exp $ */
        !             2: #ifndef lint
        !             3: static char *sccsid = "@(#)Form.c      1.17    5/18/87";
        !             4: #endif lint
        !             5: /*
        !             6:  * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
        !             7:  * 
        !             8:  *                         All Rights Reserved
        !             9:  * 
        !            10:  * Permission to use, copy, modify, and distribute this software and its 
        !            11:  * documentation for any purpose and without fee is hereby granted, 
        !            12:  * provided that the above copyright notice appear in all copies and that
        !            13:  * both that copyright notice and this permission notice appear in 
        !            14:  * supporting documentation, and that the name of Digital Equipment
        !            15:  * Corporation not be used in advertising or publicity pertaining to
        !            16:  * distribution of the software without specific, written prior permission.  
        !            17:  * 
        !            18:  * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
        !            19:  * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
        !            20:  * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
        !            21:  * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
        !            22:  * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
        !            23:  * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
        !            24:  * SOFTWARE.
        !            25:  */
        !            26: 
        !            27: #include "Xlib.h"
        !            28: #include "Intrinsic.h"
        !            29: #include "Form.h"
        !            30: #include "Atoms.h"
        !            31: 
        !            32: 
        !            33: /* Private Definitions */
        !            34: 
        !            35: 
        !            36: typedef struct SubWidgetDataRec {
        !            37:     Window w;                  /* Window id for this subwidget. */
        !            38:     struct WidgetDataRec *data;        /* Pointer to form widget data. */
        !            39:     XtEdgeType top, bottom, left, right;
        !            40:                                /* Where to drag things on resize. */
        !            41:     int dx;                    /* Desired initial horiz offset. */
        !            42:     Window fromhoriz;          /* Other subwidget to base dx off of.
        !            43:                                   (NULL if form edge.) */
        !            44:     int dy;                    /* Desired initial vertical offset. */
        !            45:     Window fromvert;           /* Other subwidget to base dy off of.
        !            46:                                   (NULL if form edge.) */
        !            47:     Boolean allowresize;       /* TRUE if we allow the subwidget to resize
        !            48:                                   itself. */
        !            49:     WindowBox wb;              /* Current coordinates.  */
        !            50: } SubWidgetDataRec, *SubWidgetData;
        !            51: 
        !            52: 
        !            53: static SubWidgetDataRec subglob;
        !            54: static SubWidgetDataRec subinit = {0};
        !            55: 
        !            56: typedef struct WidgetDataRec {
        !            57:     Display *dpy;              /* Display connection for the form widget */
        !            58:     Window mywin;              /* Window ID of form widget. */
        !            59:     WindowBox wb;              /* Coordinates of form widget. */
        !            60:     SubWidgetData *sub;                /* Array of subwidgets. */
        !            61:     int numsub;                        /* Number of subwidgets. */
        !            62:     Pixel background;          /* Background color. */
        !            63:     Pixel border;              /* Border color. */
        !            64:     int defaultdistance;       /* Default distance between widgets. */
        !            65:     int dontrefigure;          /* Nonzero if we don't want to recalc. */
        !            66:     Boolean needsrefigure;     /* TRUE if we need to recalc. */
        !            67: } WidgetDataRec, *WidgetData;
        !            68: 
        !            69: /* !!! STATIC !!! */
        !            70: static WidgetDataRec globaldata;
        !            71: static WidgetDataRec globalinit = {0};
        !            72: 
        !            73: /* Private Data */
        !            74: 
        !            75: static Resource resources[] = {
        !            76:     {XtNwindow, XtCWindow, XrmRWindow, sizeof(Window),
        !            77:         (caddr_t)&globaldata.mywin, (caddr_t)NULL},
        !            78:     {XtNborderWidth, XtCBorderWidth, XrmRInt, sizeof(int),
        !            79:         (caddr_t)&globaldata.wb.borderWidth, (caddr_t)NULL},
        !            80:     {XtNx, XtCX, XrmRInt, sizeof(int),
        !            81:   (caddr_t)&globaldata.wb.x, (caddr_t)NULL},
        !            82:     {XtNy, XtCY, XrmRInt, sizeof(int),
        !            83:   (caddr_t)&globaldata.wb.y, (caddr_t)NULL},
        !            84:     {XtNwidth, XtCWidth, XrmRInt, sizeof(int),
        !            85:         (caddr_t)&globaldata.wb.width, (caddr_t)NULL},
        !            86:     {XtNheight, XtCHeight, XrmRInt, sizeof(int),
        !            87:         (caddr_t)&globaldata.wb.height, (caddr_t)NULL},
        !            88:     {XtNbackground, XtCColor, XrmRPixel, sizeof(Pixel),
        !            89:         (caddr_t)&globaldata.background, (caddr_t)&XtDefaultBGPixel},
        !            90:     {XtNborder, XtCColor, XrmRPixel, sizeof(Pixel),
        !            91:         (caddr_t)&globaldata.border,(caddr_t)&XtDefaultFGPixel},
        !            92:     {XtNdefaultDistance, XtCThickness, XrmRInt,
        !            93:        sizeof(int), (caddr_t)&globaldata.defaultdistance, (caddr_t)NULL},
        !            94: };
        !            95: 
        !            96: static XtEdgeType defEdge = XtRubber;
        !            97: 
        !            98: static Resource subresources[] = {
        !            99:     {XtNtop, XtCEdge, XtRJustify, sizeof(XtEdgeType),
        !           100:         (caddr_t)&subglob.top, (caddr_t)&defEdge},
        !           101:     {XtNbottom, XtCEdge, XtRJustify, sizeof(XtEdgeType),
        !           102:         (caddr_t)&subglob.bottom, (caddr_t)&defEdge},
        !           103:     {XtNleft, XtCEdge, XtRJustify, sizeof(XtEdgeType),
        !           104:         (caddr_t)&subglob.left, (caddr_t)&defEdge},
        !           105:     {XtNright, XtCEdge, XtRJustify, sizeof(XtEdgeType),
        !           106:         (caddr_t)&subglob.right, (caddr_t)&defEdge},
        !           107:     {XtNfromHoriz, XtCWindow, XrmRWindow, sizeof(Window),
        !           108:         (caddr_t)&subglob.fromhoriz, (caddr_t)NULL},
        !           109:     {XtNfromVert, XtCWindow, XrmRWindow, sizeof(Window),
        !           110:         (caddr_t)&subglob.fromvert, (caddr_t)NULL},
        !           111:     {XtNhorizDistance, XtCThickness, XrmRInt, sizeof(int),
        !           112:         (caddr_t)&subglob.dx, (caddr_t)NULL},
        !           113:     {XtNvertDistance, XtCThickness, XrmRInt, sizeof(int),
        !           114:         (caddr_t)&subglob.dy, (caddr_t)NULL},
        !           115:     {XtNresizable, XtCBoolean, XrmRBoolean, sizeof(Boolean),
        !           116:         (caddr_t)&subglob.allowresize, (caddr_t) NULL}
        !           117: };
        !           118: 
        !           119: 
        !           120: static XContext formContext;
        !           121: static XContext subContext;
        !           122: 
        !           123: /****************************************************************
        !           124:  *
        !           125:  * Private Procedures
        !           126:  *
        !           127:  ****************************************************************/
        !           128: 
        !           129: static Boolean initialized = FALSE;
        !           130: 
        !           131: static void Initialize () 
        !           132: {
        !           133:     if (initialized)
        !           134:        return;
        !           135:     initialized = TRUE;
        !           136: 
        !           137:     subinit.top = subinit.bottom = subinit.left = subinit.right = XtRubber;
        !           138:     subinit.wb.x = subinit.wb.y = -1;
        !           139: 
        !           140:     globalinit.wb.width = globalinit.wb.height = 10;
        !           141:     globalinit.wb.x = globalinit.wb.y = 0;
        !           142:     globalinit.defaultdistance = 4;
        !           143:     globalinit.wb.borderWidth = 1;
        !           144: 
        !           145:     formContext = XUniqueContext();
        !           146:     subContext = XUniqueContext();
        !           147: }
        !           148: 
        !           149: 
        !           150: static WidgetData DataFromWindow(dpy, w)
        !           151: Display *dpy;
        !           152: Window w;
        !           153: {
        !           154:     WidgetData result;
        !           155:     if (XFindContext(dpy, w, formContext, (caddr_t *)&result))
        !           156:        return NULL;
        !           157:     return result;
        !           158: }
        !           159: 
        !           160: static SubWidgetData SubFromWindow(dpy, w)
        !           161: Display *dpy;
        !           162: Window w;
        !           163: {
        !           164:     SubWidgetData result;
        !           165:     if (XFindContext(dpy, w, subContext, (caddr_t *)&result))
        !           166:        return NULL;
        !           167:     return result;
        !           168: }
        !           169: 
        !           170: static void RefigureLocations(data)
        !           171: WidgetData data;
        !           172: {
        !           173:     int i;
        !           174:     Position x, y, maxx, maxy;
        !           175:     SubWidgetData sub, sub2;
        !           176:     WindowBox reqBox, replBox;
        !           177:     XtGeometryReturnCode result;
        !           178:     if (data->dontrefigure) {
        !           179:        data->needsrefigure = TRUE;
        !           180:        return;
        !           181:     }
        !           182:     maxx = maxy = 0;
        !           183:     for (i=0 ; i<data->numsub ; i++) {
        !           184:        sub = data->sub[i];
        !           185:        x = sub->dx;
        !           186:        y = sub->dy;
        !           187:        if (sub->fromhoriz && (sub2 = SubFromWindow(data->dpy, sub->fromhoriz)))
        !           188:            x += sub2->wb.x + sub2->wb.width;
        !           189:        if (sub->fromvert && (sub2 = SubFromWindow(data->dpy, sub->fromvert)))
        !           190:            y += sub2->wb.y + sub2->wb.height;
        !           191:        if (x != sub->wb.x || y != sub->wb.y) {
        !           192:            XMoveWindow(data->dpy, sub->w, x, y);
        !           193:            sub->wb.x = x;
        !           194:            sub->wb.y = y;
        !           195:        }
        !           196:        if (maxx < x + sub->wb.width) maxx = x + sub->wb.width;
        !           197:        if (maxy < y + sub->wb.height) maxy = y + sub->wb.height;
        !           198:     }
        !           199:     maxx += data->defaultdistance;
        !           200:     maxy += data->defaultdistance;
        !           201:     if (maxx != data->wb.width || maxy != data->wb.height) {
        !           202:        reqBox.width = maxx;
        !           203:        reqBox.height = maxy;
        !           204:        result = XtMakeGeometryRequest(data->dpy, data->mywin, XtgeometryResize,
        !           205:                                       &reqBox, &replBox);
        !           206:        if (result == XtgeometryAlmost) {
        !           207:            replBox = reqBox;
        !           208:            result = XtMakeGeometryRequest(data->dpy, data->mywin, XtgeometryResize,
        !           209:                                           &reqBox, &replBox);
        !           210:        }
        !           211:        if (result == XtgeometryYes) {
        !           212:            data->wb.width = reqBox.width;
        !           213:            data->wb.height = reqBox.height;
        !           214:        }
        !           215:     }
        !           216:     data->needsrefigure = FALSE;
        !           217: }
        !           218: 
        !           219: 
        !           220: static int MoveEdge(loc, old, new, type)
        !           221: int loc, old, new;
        !           222: XtEdgeType type;
        !           223: {
        !           224:     if (type == XtRubber)
        !           225:        return loc * new / old;
        !           226:     if (type == XtChainTop || type == XtChainLeft)
        !           227:        return loc;
        !           228:     return loc + new - old;
        !           229: }
        !           230: 
        !           231: static void ChangeSize(data, newwidth, newheight)
        !           232: WidgetData data;
        !           233: int newwidth, newheight;
        !           234: {
        !           235:     int i;
        !           236:     SubWidgetData sub;
        !           237:     WindowBox wb;
        !           238:     for (i=0 ; i<data->numsub ; i++) {
        !           239:        sub = data->sub[i];
        !           240:        wb.borderWidth = sub->wb.borderWidth;
        !           241:        wb.x = MoveEdge(sub->wb.x, (int)data->wb.width, newwidth, sub->left);
        !           242:        wb.y = MoveEdge(sub->wb.y, (int)data->wb.height, newheight, sub->top);
        !           243:        wb.width =
        !           244:            MoveEdge((int)(sub->wb.x + sub->wb.width),
        !           245:                       (int)data->wb.width, newwidth, sub->right) - wb.x;
        !           246:        wb.height = MoveEdge((int)(sub->wb.y + sub->wb.height),
        !           247:                            (int)data->wb.height, newheight, sub->bottom)
        !           248:                        - wb.y;
        !           249:        if (wb.width < 1) wb.width = 1;
        !           250:        if (wb.height < 1) wb.height = 1;
        !           251:        if (wb.x != sub->wb.x || wb.y != sub->wb.y ||
        !           252:                wb.width != sub->wb.width || wb.height != sub->wb.height) {
        !           253:            XMoveResizeWindow(data->dpy, sub->w, wb.x, wb.y,
        !           254:                              wb.width, wb.height);
        !           255:            (void) XtSendConfigureNotify(data->dpy, sub->w, &wb);
        !           256:            sub->wb = wb;
        !           257:        }
        !           258:     }
        !           259:     data->wb.width = newwidth;
        !           260:     data->wb.height = newheight;
        !           261: }
        !           262: 
        !           263: 
        !           264: /* ARGSUSED */
        !           265: static XtGeometryReturnCode FormGeometryHandler(dpy, w, req, reqBox, replBox)
        !           266: Display *dpy;
        !           267: Window w;
        !           268: XtGeometryRequest req;
        !           269: WindowBox *reqBox;
        !           270: WindowBox *replBox;    /* RETURN */
        !           271: {
        !           272:     SubWidgetData sub;
        !           273:     sub = SubFromWindow(dpy, w);
        !           274:     if (sub && req == XtgeometryResize && sub->allowresize) {
        !           275:        XResizeWindow(sub->data->dpy, sub->w, reqBox->width, reqBox->height);
        !           276:        *replBox = *reqBox;
        !           277:        sub->wb.width = reqBox->width;
        !           278:        sub->wb.height = reqBox->height;
        !           279:        (void) XtSendConfigureNotify(sub->data->dpy, w, &(sub->wb));
        !           280:        RefigureLocations(sub->data);
        !           281:        return XtgeometryYes;
        !           282:     }
        !           283:     return XtgeometryNo;
        !           284: }
        !           285: 
        !           286: 
        !           287: /*
        !           288:  *
        !           289:  * Destroy the widget
        !           290:  *
        !           291:  */
        !           292: 
        !           293: static void Destroy(data)
        !           294: WidgetData data;
        !           295: {
        !           296:     int i;
        !           297:     for (i=0 ; i<data->numsub; i++) {
        !           298:        (void) XDeleteContext(data->dpy, data->sub[i]->w, subContext);
        !           299:        (void) XtSendDestroyNotify(data->dpy, data->sub[i]->w);
        !           300:     }
        !           301:     XtClearEventHandlers(data->dpy, data->mywin);
        !           302:     (void) XDeleteContext(data->dpy, data->mywin, formContext);
        !           303:     XtFree((char *) data->sub);
        !           304:     XtFree((char *) data);
        !           305: }
        !           306: 
        !           307: 
        !           308: /*
        !           309:  *
        !           310:  * Generic widget event handler
        !           311:  *
        !           312:  */
        !           313: 
        !           314: static XtEventReturnCode EventHandler(event, eventdata)
        !           315: XEvent *event;
        !           316: caddr_t eventdata;
        !           317: {
        !           318:     WidgetData data = (WidgetData ) eventdata;
        !           319:     int newwidth, newheight;
        !           320: 
        !           321:     switch (event->type) {
        !           322:        case ConfigureNotify:
        !           323:            newwidth = event->xconfigure.width;
        !           324:            newheight = event->xconfigure.height;
        !           325:            if (newwidth != data->wb.width || newheight != data->wb.height)
        !           326:                ChangeSize(data, newwidth, newheight);
        !           327:            break;
        !           328: 
        !           329:        case DestroyNotify:
        !           330:            Destroy(data);
        !           331:            break;
        !           332:        
        !           333:     }
        !           334:     return (XteventHandled);
        !           335: }
        !           336: 
        !           337: /*
        !           338:  * Handle events in subwidgets. 
        !           339:  */
        !           340: 
        !           341: static XtEventReturnCode SubEventHandler(event, sub)
        !           342: XEvent *event;
        !           343: SubWidgetData sub;
        !           344: {
        !           345:     if (event->type == DestroyNotify) {
        !           346:        XtFormRemoveWidget(sub->data->dpy, sub->data->mywin, sub->w);
        !           347:        return XteventHandled;
        !           348:     }
        !           349:     return XteventNotHandled;
        !           350: }
        !           351: 
        !           352: /****************************************************************
        !           353:  *
        !           354:  * Public Procedures
        !           355:  *
        !           356:  ****************************************************************/
        !           357: 
        !           358: Window XtFormCreate(dpy, parent, args, argCount)
        !           359: Display  *dpy;
        !           360: Window   parent;
        !           361: ArgList  args;
        !           362: int      argCount;
        !           363: {
        !           364:     WidgetData data;
        !           365:     XrmNameList  names;
        !           366:     XrmClassList classes;
        !           367:     if (!initialized)
        !           368:        Initialize ();
        !           369: 
        !           370:     data = (WidgetData) XtMalloc(sizeof(WidgetDataRec));
        !           371: 
        !           372:     /* Set Default Values */
        !           373:     globaldata = globalinit;
        !           374:     globaldata.dpy = dpy;
        !           375:     XtGetResources(dpy, resources, XtNumber(resources), args, argCount, parent,
        !           376:                   "form", "Form", &names, &classes);
        !           377:     *data = globaldata;    
        !           378: 
        !           379:     data->numsub = 0;
        !           380:     data->sub = (SubWidgetData *)XtMalloc(sizeof(SubWidgetData));
        !           381:     if (data->mywin != NULL) {
        !           382:        XWindowAttributes wi;
        !           383:        /* set global data from window parameters */
        !           384:        if (! XGetWindowAttributes(data->dpy, data->mywin, &wi)) {
        !           385:            data->mywin = NULL;
        !           386:        } else {
        !           387:            data->wb.borderWidth = wi.border_width;
        !           388:            data->wb.width = wi.width;
        !           389:            data->wb.height = wi.height;
        !           390:             data->wb.x = wi.x;
        !           391:             data->wb.y = wi.y;
        !           392:        }
        !           393:     }
        !           394:     if (data->mywin == NULL) {
        !           395:        /* create the Form window */
        !           396:         data->mywin = XCreateSimpleWindow(data->dpy, parent, data->wb.x,
        !           397:                                          data->wb.y, data->wb.width, data->wb.height,
        !           398:                                          data->wb.borderWidth,
        !           399:                                          data->border, data->background);
        !           400:     }
        !           401: 
        !           402:     XtSetNameAndClass(data->dpy, data->mywin, names, classes);
        !           403:     XrmFreeNameList(names);
        !           404:     XrmFreeClassList(classes);
        !           405:     (void) XSaveContext(data->dpy, data->mywin, formContext, (caddr_t)data);
        !           406: 
        !           407:     /* set handler for resize, and message events */
        !           408: 
        !           409:     XtSetEventHandler (data->dpy, data->mywin, (XtEventHandler)EventHandler,
        !           410:                       StructureNotifyMask, (caddr_t)data);
        !           411: 
        !           412:     return (data->mywin);
        !           413: }
        !           414: 
        !           415: /*
        !           416:  *
        !           417:  * Get Attributes
        !           418:  *
        !           419:  */
        !           420: 
        !           421: void XtFormGetValues (dpy, w, args, argCount)
        !           422: Display *dpy;
        !           423: Window w;
        !           424: ArgList args;
        !           425: int argCount;
        !           426: {
        !           427:     WidgetData data;
        !           428: 
        !           429:     if ((data = DataFromWindow(dpy, w)) == NULL)
        !           430:        return;
        !           431:     globaldata = *data;
        !           432:     XtGetValues(resources, XtNumber(resources), args, argCount);
        !           433: }
        !           434: 
        !           435: /*
        !           436:  *
        !           437:  * Set Values
        !           438:  *
        !           439:  */
        !           440: 
        !           441: void XtFormSetValues (dpy, w, args, argCount)
        !           442: Display *dpy;
        !           443: Window w;
        !           444: ArgList args;
        !           445: int argCount;
        !           446: {
        !           447:     WidgetData data;
        !           448: 
        !           449:     if ((data = DataFromWindow(dpy, w)) == NULL)
        !           450:        return;
        !           451:     globaldata = *data;
        !           452:     XtSetValues(resources, XtNumber(resources), args, argCount);
        !           453:     *data = globaldata;
        !           454: }
        !           455: 
        !           456: 
        !           457: /*
        !           458:  * Add a new widget to the form.
        !           459:  */
        !           460: 
        !           461: void XtFormAddWidget(dpy, mywin, w, args, argCount)
        !           462: Display *dpy;
        !           463: Window mywin, w;
        !           464: ArgList args;
        !           465: int argCount;
        !           466: {
        !           467:     WidgetData data;
        !           468:     SubWidgetData sub;
        !           469:     XrmNameList names;
        !           470:     XrmClassList classes;
        !           471:     XWindowAttributes info;
        !           472:     if ((data = DataFromWindow(dpy, mywin)) == NULL) return;
        !           473:     if ((sub = SubFromWindow(dpy, w)) == NULL) {
        !           474:        data->sub = (SubWidgetData *)
        !           475:            XtRealloc((char *) data->sub,
        !           476:                      (unsigned) sizeof(SubWidgetData) * ++data->numsub);
        !           477:        sub = data->sub[data->numsub - 1] =
        !           478:            (SubWidgetData) XtMalloc(sizeof(SubWidgetDataRec));
        !           479:        (void)XSaveContext(dpy, w, subContext, (caddr_t)sub);
        !           480:        *sub = subinit;
        !           481:        sub->data = data;
        !           482:        sub->w = w;
        !           483:        sub->dx = sub->dy = data->defaultdistance;
        !           484:        (void) XGetWindowAttributes(data->dpy, w, &info); /* %%% Icky-poo. */
        !           485:        sub->wb.width = info.width;
        !           486:        sub->wb.height = info.height;
        !           487:        sub->wb.borderWidth = info.border_width;
        !           488:        (void) XtSetGeometryHandler(dpy, w, (XtGeometryHandler) FormGeometryHandler);
        !           489:        (void) XtSetEventHandler(dpy, w, (XtEventHandler)SubEventHandler,
        !           490:                                 StructureNotifyMask, (caddr_t)sub);
        !           491:     }
        !           492:     subglob = *sub;
        !           493:     XtGetResources(dpy, subresources, XtNumber(subresources), args, argCount,
        !           494:                   w, "ignore", "Ignore", &names, &classes);
        !           495:     *sub = subglob;
        !           496:     XrmFreeNameList(names);
        !           497:     XrmFreeClassList(classes);
        !           498:     RefigureLocations(data);
        !           499:     XMapWindow(data->dpy, w);
        !           500: }
        !           501: 
        !           502: 
        !           503: /*
        !           504:  * Remove a subwidget from a form.  Doesn't delete the subwidget. 
        !           505:  */
        !           506: 
        !           507: void XtFormRemoveWidget(dpy, mywin, w)
        !           508: Display *dpy;
        !           509: Window mywin, w;
        !           510: {
        !           511:     WidgetData data;
        !           512:     SubWidgetData sub;
        !           513:     Boolean found;
        !           514:     int i;
        !           515:     if ((data = DataFromWindow(dpy, mywin)) == NULL ||
        !           516:        (sub = SubFromWindow(dpy, w)) == NULL) return;
        !           517:     found = FALSE;
        !           518:     for (i=0 ; i<data->numsub ; i++) {
        !           519:        if (data->sub[i]->fromhoriz == w)
        !           520:            data->sub[i]->fromhoriz = sub->fromhoriz;
        !           521:        if (data->sub[i]->fromvert == w)
        !           522:            data->sub[i]->fromvert = sub->fromvert;
        !           523:        if (!found) found = (data->sub[i] == sub);
        !           524:        if (found) data->sub[i] = data->sub[i+1];
        !           525:     }
        !           526:     if (found) (data->numsub)--;
        !           527:     XtSetEventHandler(dpy, w, (XtEventHandler) SubEventHandler,
        !           528:                      (unsigned long) 0, (caddr_t) NULL);
        !           529:     (void) XtClearGeometryHandler(dpy, w);
        !           530:     (void) XDeleteContext(dpy, w, subContext);
        !           531:     XtFree((char *)sub);
        !           532: }
        !           533:     
        !           534: 
        !           535: 
        !           536: /* 
        !           537:  * Set or reset figuring
        !           538:  */
        !           539: 
        !           540: void XtFormDoLayout(dpy, mywin, doit)
        !           541: Display *dpy;
        !           542: Window mywin;
        !           543: Boolean doit;
        !           544: {
        !           545:     WidgetData data;
        !           546:     if ((data = DataFromWindow(dpy, mywin)) == NULL)
        !           547:        return;
        !           548:     if (doit && data->dontrefigure > 0) data->dontrefigure--;
        !           549:     else data->dontrefigure++;
        !           550:     if (data->needsrefigure) RefigureLocations(data);
        !           551: }

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