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Annotation of researchv9/X11/src/X.V11R1/lib/Xtk/Label.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char rcsid[] = "$Header: Label.c,v 1.25 87/09/13 22:09:43 newman Exp $";
        !             3: #endif lint
        !             4: 
        !             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:  * 
        !            19:  * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
        !            20:  * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
        !            21:  * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
        !            22:  * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
        !            23:  * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
        !            24:  * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
        !            25:  * SOFTWARE.
        !            26:  */
        !            27: /*
        !            28:  * Label.c - Label widget
        !            29:  *
        !            30:  * Author:      Charles Haynes
        !            31:  *              Digital Equipment Corporation
        !            32:  *              Western Research Laboratory
        !            33:  * Date:        Sat Jan 24 1987
        !            34:  *
        !            35:  * Converted to classing toolkit on Wed Aug 26 by Charles Haynes
        !            36:  */
        !            37: 
        !            38: #define XtStrlen(s)    ((s) ? strlen(s) : 0)
        !            39: 
        !            40: #include <stdio.h>
        !            41: #include <string.h>
        !            42: #include <ctype.h>
        !            43: #include "Intrinsic.h"
        !            44: #include "Label.h"
        !            45: #include "LabelP.h"
        !            46: #include "Atoms.h"
        !            47: 
        !            48: /****************************************************************
        !            49:  *
        !            50:  * Full class record constant
        !            51:  *
        !            52:  ****************************************************************/
        !            53: 
        !            54: /* Private Data */
        !            55: 
        !            56: #define XtRjustify             "Justify"
        !            57: 
        !            58: static XtResource resources[] = {
        !            59:     {XtNforeground, XtCForeground, XrmRPixel, sizeof(Pixel),
        !            60:        XtOffset(LabelWidget, label.foreground), XrmRString, "Black"},
        !            61:     {XtNfont,  XtCFont, XrmRFontStruct, sizeof(XFontStruct *),
        !            62:        XtOffset(LabelWidget, label.font),XrmRString, "Fixed"},
        !            63:     {XtNlabel,  XtCLabel, XrmRString, sizeof(String),
        !            64:        XtOffset(LabelWidget, label.label), XrmRString, NULL},
        !            65:     {XtNjustify, XtCJustify, XtRJustify, sizeof(XtJustify),
        !            66:        XtOffset(LabelWidget, label.justify), XrmRString, "Center"},
        !            67:     {XtNinternalWidth, XtCWidth, XrmRInt,  sizeof(Dimension),
        !            68:        XtOffset(LabelWidget, label.internal_width),XrmRString, "4"},
        !            69:     {XtNinternalHeight, XtCHeight, XrmRInt, sizeof(Dimension),
        !            70:        XtOffset(LabelWidget, label.internal_height),XrmRString, "2"},
        !            71: };
        !            72: 
        !            73: static void Initialize();
        !            74: static void Realize();
        !            75: static void Resize();
        !            76: static void Redisplay();
        !            77: static Boolean SetValues();
        !            78: static void ClassInitialize();
        !            79: 
        !            80: LabelClassRec labelClassRec = {
        !            81:   {
        !            82: /* core_class fields */        
        !            83:     /* superclass        */    (WidgetClass) &widgetClassRec,
        !            84:     /* class_name        */    "Label",
        !            85:     /* widget_size       */    sizeof(LabelRec),
        !            86:     /* class_initialize   */    ClassInitialize,
        !            87:     /* class_inited       */   FALSE,
        !            88:     /* initialize        */    Initialize,
        !            89:     /* realize           */    Realize,
        !            90:     /* actions           */    NULL,
        !            91:     /* num_actions       */    0,
        !            92:     /* resources         */    resources,
        !            93:     /* num_resources     */    XtNumber(resources),
        !            94:     /* xrm_class         */    NULLQUARK,
        !            95:     /* compress_motion   */    TRUE,
        !            96:     /* compress_exposure  */   TRUE,
        !            97:     /* visible_interest          */    FALSE,
        !            98:     /* destroy           */    NULL,
        !            99:     /* resize            */    Resize,
        !           100:     /* expose            */    Redisplay,
        !           101:     /* set_values        */    SetValues,
        !           102:     /* accept_focus      */    NULL,
        !           103:   }
        !           104: };
        !           105: WidgetClass labelWidgetClass = (WidgetClass)&labelClassRec;
        !           106: /****************************************************************
        !           107:  *
        !           108:  * Private Procedures
        !           109:  *
        !           110:  ****************************************************************/
        !           111: 
        !           112: static void CvtStringToJustify();
        !           113: 
        !           114: static XrmQuark        XrmQEleft;
        !           115: static XrmQuark        XrmQEcenter;
        !           116: static XrmQuark        XrmQEright;
        !           117: 
        !           118: static void ClassInitialize()
        !           119: {
        !           120: 
        !           121:     XrmQEleft   = XrmAtomToQuark("left");
        !           122:     XrmQEcenter = XrmAtomToQuark("center");
        !           123:     XrmQEright  = XrmAtomToQuark("right");
        !           124: 
        !           125:     XrmRegisterTypeConverter(XrmRString, XtRJustify, CvtStringToJustify);
        !           126: } /* ClassInitialize */
        !           127: 
        !           128: /* ARGSUSED */
        !           129: static void CvtStringToJustify(display, fromVal, toVal)
        !           130:     Display     *display;
        !           131:     XrmValue    fromVal;
        !           132:     XrmValue    *toVal;
        !           133: {
        !           134:     static XtJustify   e;
        !           135:     XrmQuark    q;
        !           136:     char       *s = (char *) fromVal.addr;
        !           137:     char        lowerName[1000];
        !           138:     int                i;
        !           139: 
        !           140:     if (s == NULL) return;
        !           141: 
        !           142:     for (i=0; i<=strlen(s); i++) {
        !           143:         char c = s[i];
        !           144:        lowerName[i] = isupper(c) ? (char) tolower(c) : c;
        !           145:     }
        !           146: 
        !           147:     q = XrmAtomToQuark(lowerName);
        !           148: 
        !           149:     (*toVal).size = sizeof(XtJustify);
        !           150:     (*toVal).addr = (caddr_t) &e;
        !           151: 
        !           152:     if (q == XrmQEleft)   { e = XtJustifyLeft;   return; }
        !           153:     if (q == XrmQEcenter) { e = XtJustifyCenter; return; }
        !           154:     if (q == XrmQEright)  { e = XtJustifyRight;  return; }
        !           155: 
        !           156:     (*toVal).size = 0;
        !           157:     (*toVal).addr = NULL;
        !           158: };
        !           159: 
        !           160: /*
        !           161:  * Calculate width and height of displayed text in pixels
        !           162:  */
        !           163: 
        !           164: static void SetTextWidthAndHeight(lw)
        !           165:     LabelWidget lw;
        !           166: {
        !           167:     register XFontStruct       *fs = lw->label.font;
        !           168: 
        !           169:     lw->label.label_len = XtStrlen(lw->label.label);
        !           170:     lw->label.label_height = fs->max_bounds.ascent + fs->max_bounds.descent;
        !           171:     lw->label.label_width = XTextWidth(
        !           172:        fs, lw->label.label, (int) lw->label.label_len);
        !           173: }
        !           174: 
        !           175: static void GetnormalGC(lw)
        !           176:     LabelWidget lw;
        !           177: {
        !           178:     XGCValues  values;
        !           179: 
        !           180:     values.foreground  = lw->label.foreground;
        !           181:     values.font                = lw->label.font->fid;
        !           182: 
        !           183:     lw->label.normal_GC = XtGetGC(
        !           184:        (Widget)lw,
        !           185:        (unsigned) GCForeground | GCFont,
        !           186:        &values);
        !           187: }
        !           188: 
        !           189: static void GetgrayGC(lw)
        !           190:     LabelWidget lw;
        !           191: {
        !           192:     XGCValues  values;
        !           193:     
        !           194:     lw->label.gray_pixmap = XtGrayPixmap(XtScreen((Widget)lw));
        !           195: 
        !           196:     values.foreground  = lw->label.foreground;
        !           197:     values.font                = lw->label.font->fid;
        !           198:     values.tile       = lw->label.gray_pixmap;
        !           199:     values.fill_style = FillTiled;
        !           200: 
        !           201:     lw->label.gray_GC = XtGetGC(
        !           202:        (Widget)lw, 
        !           203:        (unsigned) GCForeground | GCFont | GCTile | GCFillStyle, 
        !           204:        &values);
        !           205: }
        !           206: 
        !           207: static void Initialize(request, new, args, num_args)
        !           208:  Widget request, new;
        !           209:  ArgList args;
        !           210:  Cardinal num_args;
        !           211: {
        !           212:     LabelWidget lw = (LabelWidget) new;
        !           213: 
        !           214:     if (lw->label.label == NULL) {
        !           215:        unsigned int    len = strlen(lw->core.name);
        !           216:        lw->label.label = XtMalloc(len+1);
        !           217:        (void) strcpy(lw->label.label, lw->core.name);
        !           218:     }
        !           219: 
        !           220:     GetnormalGC(lw);
        !           221:     GetgrayGC(lw);
        !           222: 
        !           223:     SetTextWidthAndHeight(lw);
        !           224: 
        !           225:     if (lw->core.width == 0)
        !           226:         lw->core.width = lw->label.label_width + 2 * lw->label.internal_width;
        !           227:     if (lw->core.height == 0)
        !           228:         lw->core.height = lw->label.label_height + 2*lw->label.internal_height;
        !           229: 
        !           230:     Resize((Widget)lw);
        !           231: 
        !           232:     lw->label.display_sensitive = FALSE;
        !           233: 
        !           234: } /* Initialize */
        !           235: 
        !           236: 
        !           237: static void Realize(w, valueMask, attributes)
        !           238:     register Widget w;
        !           239:     Mask valueMask;
        !           240:     XSetWindowAttributes *attributes;
        !           241: {
        !           242:   LabelWidget lw = (LabelWidget)w;
        !           243: 
        !           244:     valueMask |= CWBitGravity;
        !           245:     switch (((LabelWidget)w)->label.justify) {
        !           246:        case XtJustifyLeft:     attributes->bit_gravity = WestGravity;   break;
        !           247:        case XtJustifyCenter:   attributes->bit_gravity = CenterGravity; break;
        !           248:        case XtJustifyRight:    attributes->bit_gravity = EastGravity;   break;
        !           249:     }
        !           250:     
        !           251:     if (!(w->core.sensitive))
        !           252:       {
        !           253:          /* change border to gray */
        !           254:        lw->core.border_pixmap = lw->label.gray_pixmap;
        !           255:        attributes->border_pixmap = lw->label.gray_pixmap;
        !           256:        valueMask |= CWBorderPixmap;
        !           257:        lw->label.display_sensitive = TRUE;
        !           258:       }
        !           259:     
        !           260: 
        !           261:     w->core.window =
        !           262:          XCreateWindow(
        !           263:                XtDisplay(w), w->core.parent->core.window,
        !           264:                w->core.x, w->core.y,
        !           265:                w->core.width, w->core.height, w->core.border_width,
        !           266:                (int) w->core.depth,
        !           267:                InputOutput, (Visual *)CopyFromParent,  
        !           268:                valueMask, attributes);
        !           269: } /* Realize */
        !           270: 
        !           271: 
        !           272: 
        !           273: /*
        !           274:  * Repaint the widget window
        !           275:  */
        !           276: 
        !           277: /* ARGSUSED */
        !           278: static void Redisplay(w, event)
        !           279:     Widget w;
        !           280:     XEvent *event;
        !           281: {
        !           282:    LabelWidget lw = (LabelWidget) w;
        !           283: 
        !           284:    XDrawString(
        !           285:        XtDisplay(w), XtWindow(w), lw->label.normal_GC,
        !           286:        lw->label.label_x, lw->label.label_y,
        !           287:        lw->label.label, (int) lw->label.label_len);
        !           288: }
        !           289: 
        !           290: 
        !           291: static void Resize(w)
        !           292:     Widget w;
        !           293: {
        !           294:     LabelWidget lw = (LabelWidget) w;
        !           295: 
        !           296:     switch (lw->label.justify) {
        !           297: 
        !           298:        case XtJustifyLeft   :
        !           299:            lw->label.label_x = lw->label.internal_width;
        !           300:            break;
        !           301: 
        !           302:        case XtJustifyRight  :
        !           303:            lw->label.label_x = lw->core.width -
        !           304:                (lw->label.label_width + lw->label.internal_width);
        !           305:            break;
        !           306: 
        !           307:        case XtJustifyCenter :
        !           308:            lw->label.label_x = (lw->core.width - lw->label.label_width) / 2;
        !           309:            break;
        !           310:     }
        !           311:     if (lw->label.label_x < 0) lw->label.label_x = 0;
        !           312:     lw->label.label_y = (lw->core.height - lw->label.label_height) / 2
        !           313:        + lw->label.font->max_bounds.ascent;
        !           314: }
        !           315: 
        !           316: /*
        !           317:  * Set specified arguments into widget
        !           318:  */
        !           319: 
        !           320: static Boolean SetValues(current, request, new, last)
        !           321:     Widget current, request, new;
        !           322:     Boolean last;
        !           323: {
        !           324:     LabelWidget curlw = (LabelWidget) current;
        !           325:     LabelWidget reqlw = (LabelWidget) request;
        !           326:     LabelWidget newlw = (LabelWidget) new;
        !           327:     XtWidgetGeometry   reqGeo;
        !           328: 
        !           329:     if (newlw->label.label == NULL) {
        !           330:        /* the string will be copied below... */
        !           331:        newlw->label.label = newlw->core.name;
        !           332:     }
        !           333: 
        !           334:     if ((curlw->label.label != newlw->label.label)
        !           335:        || (curlw->label.font != newlw->label.font)
        !           336:        || (curlw->label.justify != newlw->label.justify)) {
        !           337: 
        !           338:        SetTextWidthAndHeight(newlw);
        !           339: 
        !           340:        }
        !           341: 
        !           342:     /* note that there is no way to change the label and force the window */
        !           343:     /* to keep it's current size (and possibly clip the text) perhaps we */
        !           344:     /* should make the user set width and height to 0 when they set the */
        !           345:     /* label if they want the label to recompute size based on the new */
        !           346:     /* label? */
        !           347:     if (curlw->label.label != newlw->label.label) {
        !           348:         if (newlw->label.label != NULL) {
        !           349:            newlw->label.label = strcpy(
        !           350:                XtMalloc((unsigned) newlw->label.label_len + 1),
        !           351:                newlw->label.label);
        !           352:        }
        !           353:        XtFree ((char *) curlw->label.label);
        !           354:     }
        !           355: 
        !           356:     /* calculate the window size */
        !           357:     if (curlw->core.width == newlw->core.width)
        !           358:        newlw->core.width =
        !           359:            newlw->label.label_width +2*newlw->label.internal_width;
        !           360: 
        !           361:     if (curlw->core.height == newlw->core.height)
        !           362:        newlw->core.height =
        !           363:            newlw->label.label_height + 2*newlw->label.internal_height;
        !           364: 
        !           365:     reqGeo.request_mode = NULL;
        !           366: 
        !           367:     if (curlw->core.x != newlw->core.x) {
        !           368:        reqGeo.request_mode |= CWX;
        !           369:        reqGeo.x = newlw->core.x;
        !           370:     }
        !           371:     if (curlw->core.y != newlw->core.y) {
        !           372:        reqGeo.request_mode |= CWY;
        !           373:        reqGeo.y = newlw->core.y;
        !           374:     }
        !           375:     if (curlw->core.width != newlw->core.width) {
        !           376:        reqGeo.request_mode |= CWWidth;
        !           377:        reqGeo.width = newlw->core.width;
        !           378:     }
        !           379:     if (curlw->core.height != newlw->core.height) {
        !           380:        reqGeo.request_mode |= CWHeight;
        !           381:        reqGeo.height = newlw->core.height;
        !           382:     }
        !           383:     if (curlw->core.border_width != newlw->core.border_width) {
        !           384:        reqGeo.request_mode |= CWBorderWidth;
        !           385:        reqGeo.border_width = newlw->core.border_width;
        !           386:     }
        !           387: 
        !           388:     if (reqGeo.request_mode != NULL) {
        !           389:        if (XtMakeGeometryRequest(
        !           390:                (Widget)curlw,
        !           391:                &reqGeo,
        !           392:                (XtWidgetGeometry *)NULL) != XtGeometryYes) {
        !           393:            /* punt, undo requested change */
        !           394:            newlw->core.x = curlw->core.x;
        !           395:            newlw->core.y = curlw->core.y;
        !           396:            newlw->core.width = curlw->core.width;
        !           397:            newlw->core.height = curlw->core.height;
        !           398:            newlw->core.border_width = curlw->core.border_width;
        !           399:        }
        !           400:     }
        !           401: 
        !           402:     if (newlw->core.depth != curlw->core.depth) {
        !           403:        XtWarning("SetValues: Attempt to change existing widget depth.");
        !           404:        newlw->core.depth = curlw->core.depth;
        !           405:     }
        !           406: 
        !           407:     if ((curlw->core.background_pixel != newlw->core.background_pixel)
        !           408:        || (curlw->core.border_pixel != newlw->core.border_pixel)) {
        !           409: 
        !           410:        Mask valueMask = 0;
        !           411:        XSetWindowAttributes attributes;
        !           412: 
        !           413:        if (curlw->core.background_pixel != newlw->core.background_pixel) {
        !           414:            valueMask |= CWBackPixel;
        !           415:            attributes.background_pixel = newlw->core.background_pixel;
        !           416:        }
        !           417:        if (curlw->core.border_pixel != newlw->core.border_pixel) {
        !           418:            valueMask |= CWBorderPixel;
        !           419:            attributes.border_pixel = newlw->core.border_pixel;
        !           420:        }
        !           421:        XChangeWindowAttributes(
        !           422:            XtDisplay(newlw), newlw->core.window, valueMask, &attributes);
        !           423:     }
        !           424: 
        !           425:     if (curlw->core.sensitive != newlw->core.sensitive) {
        !           426:        XtWarning("Setting Label sensitivity not implemented.");
        !           427:     }
        !           428: 
        !           429:     if (curlw->label.foreground != newlw->label.foreground
        !           430:        || curlw->label.font->fid != newlw->label.font->fid) {
        !           431: 
        !           432:        XtDestroyGC(curlw->label.normal_GC);
        !           433:        GetnormalGC(newlw);
        !           434:        GetgrayGC(newlw);
        !           435:     }
        !           436: 
        !           437:     if ((curlw->label.internal_width != newlw->label.internal_width)
        !           438:         || (curlw->label.internal_height != newlw->label.internal_height)) {
        !           439:        Resize((Widget)newlw);
        !           440:     }
        !           441: 
        !           442:     return( True );            /* want Redisplay */
        !           443: }

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