src/motif/gauge.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gauge.cpp
   3 // Purpose:     wxGauge class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "gauge.h"
  14 #endif
  15
  16 #include "wx/gauge.h"
  17
  18 #include <Xm/Xm.h>
  19 #include <wx/motif/private.h>
  20
  21 #if !USE_SHARED_LIBRARY
  22 IMPLEMENT_DYNAMIC_CLASS(wxGauge, wxControl)
  23 #endif
  24
  25 // XmGauge copyright notice:
  26
  27 /*
  28 * Copyright 1994 GROUPE BULL
  29 *
  30 * Permission to use, copy, modify, and distribute this software and its
  31 * documentation for any purpose and without fee is hereby granted, provided
  32 * that the above copyright notice appear in all copies and that both that
  33 * copyright notice and this permission notice appear in supporting
  34 * documentation, and that the name of GROUPE BULL not be used in advertising
  35 * or publicity pertaining to distribution of the software without specific,
  36 * written prior permission.  GROUPE BULL makes no representations about the
  37 * suitability of this software for any purpose.  It is provided "as is"
  38 * without express or implied warranty.
  39 *
  40 * GROUPE BULL disclaims all warranties with regard to this software,
  41 * including all implied warranties of merchantability and fitness,
  42 * in no event shall GROUPE BULL be liable for any special,
  43 * indirect or consequential damages or any damages
  44 * whatsoever resulting from loss of use, data or profits,
  45 * whether in an action of contract, negligence or other tortious
  46 * action, arising out of or in connection with the use
  47 * or performance of this software.
  48 *
  49 */
  50
  51 //// PUBLIC XMGAUGE DECLARATIONS
  52 typedef struct _XmGaugeClassRec*        XmGaugeWidgetClass;
  53 typedef struct _XmGaugeRec*             XmGaugeWidget;
  54
  55 #ifdef __cplusplus
  56 extern "C" WidgetClass xmGaugeWidgetClass;
  57 #else
  58 extern WidgetClass xmGaugeWidgetClass;
  59 #endif
  60
  61 typedef struct _XmGaugeCallbackStruct{
  62     int reason;
  63     XEvent *event;
  64     int value;
  65 } XmGaugeCallbackStruct;
  66
  67
  68 void
  69 XmGaugeSetValue(Widget w, int value);
  70
  71 int
  72 XmGaugeGetValue(Widget w);
  73
  74
  75
  76 bool wxGauge::Create(wxWindow *parent, wxWindowID id,
  77                      int range,
  78                      const wxPoint& pos,
  79                      const wxSize& size,
  80                      long style,
  81                      const wxValidator& validator,
  82                      const wxString& name)
  83 {
  84     SetName(name);
  85     SetValidator(validator);
  86     m_rangeMax = range;
  87     m_windowStyle = style;
  88     m_backgroundColour = parent->GetBackgroundColour();
  89     m_foregroundColour = parent->GetForegroundColour();
  90
  91     if (parent) parent->AddChild(this);
  92
  93     if ( id == -1 )
  94         m_windowId = (int)NewControlId();
  95     else
  96         m_windowId = id;
  97
  98     Widget parentWidget = (Widget) parent->GetClientWidget();
  99
 100     Arg args[4];
 101     int count = 4;
 102     if (style & wxHORIZONTAL)
 103     {
 104         XtSetArg (args[0], XmNorientation, XmHORIZONTAL);
 105         XtSetArg (args[1], XmNprocessingDirection, XmMAX_ON_RIGHT);
 106     }
 107     else
 108     {
 109         XtSetArg (args[0], XmNorientation, XmVERTICAL);
 110         XtSetArg (args[1], XmNprocessingDirection, XmMAX_ON_TOP);
 111     }
 112     XtSetArg(args[2], XmNminimum, 0);
 113     XtSetArg(args[3], XmNmaximum, range);
 114     Widget gaugeWidget = XtCreateManagedWidget("gauge", xmGaugeWidgetClass, parentWidget, args, count);
 115     m_mainWidget = (WXWidget) gaugeWidget ;
 116
 117     XtManageChild (gaugeWidget);
 118
 119     int x = pos.x; int y = pos.y;
 120     int width = size.x; int height = size.y;
 121     if (width == -1)
 122         width = 150;
 123     if (height == -1)
 124         height = 80;
 125
 126     m_font = parent->GetFont();
 127     ChangeFont(FALSE);
 128
 129     SetCanAddEventHandler(TRUE);
 130     AttachWidget (parent, m_mainWidget, (WXWidget) NULL, x, y, width, height);
 131
 132     ChangeBackgroundColour();
 133
 134     return TRUE;
 135 }
 136
 137 void wxGauge::SetShadowWidth(int w)
 138 {
 139     if (w == 0)
 140         w = 1;
 141     XtVaSetValues((Widget) m_mainWidget, XmNshadowThickness, w, NULL);
 142 }
 143
 144 void wxGauge::SetBezelFace(int w)
 145 {
 146 }
 147
 148 void wxGauge::SetRange(int r)
 149 {
 150     m_rangeMax = r;
 151     XtVaSetValues((Widget) m_mainWidget, XmNmaximum, r, NULL);
 152 }
 153
 154 void wxGauge::SetValue(int pos)
 155 {
 156     m_gaugePos = pos;
 157     XtVaSetValues((Widget) m_mainWidget, XmNvalue, pos, NULL);
 158 }
 159
 160 int wxGauge::GetShadowWidth() const
 161 {
 162     Dimension w;
 163     XtVaGetValues((Widget) m_mainWidget, XmNshadowThickness, &w, NULL);
 164     return (int)w;
 165 }
 166
 167 int wxGauge::GetBezelFace() const
 168 {
 169     return 0;
 170 }
 171
 172 int wxGauge::GetRange() const
 173 {
 174     int r;
 175     XtVaGetValues((Widget) m_mainWidget, XmNmaximum, &r, NULL);
 176     return (int)r;
 177     //    return m_rangeMax;
 178 }
 179
 180 int wxGauge::GetValue() const
 181 {
 182     int pos;
 183     XtVaGetValues((Widget) m_mainWidget, XmNvalue, &pos, NULL);
 184     return pos;
 185     //    return m_gaugePos;
 186 }
 187
 188 void wxGauge::ChangeFont(bool keepOriginalSize)
 189 {
 190     wxWindow::ChangeFont(keepOriginalSize);
 191 }
 192
 193 void wxGauge::ChangeBackgroundColour()
 194 {
 195     wxWindow::ChangeBackgroundColour();
 196 }
 197
 198 void wxGauge::ChangeForegroundColour()
 199 {
 200     wxWindow::ChangeForegroundColour();
 201 }
 202
 203 //// PRIVATE DECLARATIONS FOR XMGAUGE
 204
 205 #include <Xm/PrimitiveP.h>
 206 #include <Xm/DrawP.h>
 207
 208 typedef struct {
 209     int empty;
 210 } XmGaugeClassPart;
 211
 212 typedef struct _XmGaugeClassRec {
 213     CoreClassPart               core_class;
 214     XmPrimitiveClassPart        primitive_class;
 215     XmGaugeClassPart            gauge_class;
 216 } XmGaugeClassRec;
 217
 218
 219 typedef struct _XmGaugePart{
 220     int value;
 221     int minimum;
 222     int maximum;
 223     unsigned char orientation;
 224     unsigned char processingDirection;
 225
 226     XtCallbackList dragCallback;
 227     XtCallbackList valueChangedCallback;
 228
 229     /* private fields */
 230     Boolean dragging;           /* drag in progress ? */
 231     int oldx, oldy;
 232     GC gc;
 233 } XmGaugePart;
 234
 235
 236 typedef struct _XmGaugeRec {
 237     CorePart            core;
 238     XmPrimitivePart     primitive;
 239     XmGaugePart         gauge;
 240 } XmGaugeRec;
 241
 242 extern XmGaugeClassRec xmGaugeClassRec;
 243
 244 /* Copyright 1994 GROUPE BULL -- See license conditions in file COPYRIGHT */
 245
 246 //// XMGAUGE IMPLEMENTATION
 247
 248 void
 249 GaugePick(Widget w, XEvent *e, String *args, Cardinal  *num_args);
 250 void
 251 GaugeDrag(Widget w, XEvent *e, String *args, Cardinal  *num_args);
 252 void
 253 GaugeDrop(Widget w, XEvent *e, String *args, Cardinal  *num_args);
 254
 255
 256
 257 static char translations[] =
 258 "<Btn1Down>: GaugePick()\n\
 259                             <Btn1Motion>: GaugeDrag()\n\
 260                             <Btn1Up>: GaugeDrop()\n\
 261                             ";
 262
 263
 264
 265 static XtActionsRec actions[] = {
 266     {"GaugePick", GaugePick},
 267     {"GaugeDrag", GaugeDrag},
 268     {"GaugeDrop", GaugeDrop},
 269 };
 270
 271 static void
 272 DrawSlider(XmGaugeWidget gw, Boolean clear)
 273 {
 274 #define THIS gw->gauge
 275     int size, sht;
 276     float ratio;
 277     /***chubraev
 278     char string[20];
 279     int len;
 280     unsigned long backgr,foregr;
 281     XRectangle rects[1];
 282     ***/
 283
 284     sht = gw->primitive.shadow_thickness;
 285
 286     ratio =  (float)THIS.value/
 287         (float)(THIS.maximum - THIS.minimum);
 288         /***chubraev
 289         sprintf(string,"%-d%%",(int)(ratio*100));
 290         len=strlen(string);
 291         XtVaGetValues(gw,XmNbackground,&backgr,XmNforeground,&foregr,NULL);
 292     ***/
 293
 294     if(clear) {
 295         XClearArea(XtDisplay(gw), XtWindow(gw), sht, sht,
 296             gw->core.width - 2 * sht, gw->core.height - 2 * sht, False);
 297     }
 298     switch(THIS.orientation) {
 299     case XmHORIZONTAL:
 300         size = (int) ((gw->core.width - 2 * sht)*ratio);
 301         /***chubraev
 302         XDrawString(XtDisplay(gw), XtWindow(gw), THIS.gc, sht+gw->core.width/2,
 303         gw->core.height - 2 * sht, string, len);
 304         ***/
 305         switch(THIS.processingDirection) {
 306         case XmMAX_ON_RIGHT:
 307         case XmMAX_ON_BOTTOM:
 308             XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 309                 sht, sht, size, gw->core.height - 2 * sht);
 310
 311                 /***chubraev
 312                 rects[0].x = sht; rects[0].y = sht;
 313                 rects[0].width = size; rects[0].height = gw->core.height - 2 * sht;
 314             ***/
 315             break;
 316         case XmMAX_ON_LEFT:
 317         case XmMAX_ON_TOP:
 318             XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 319                 gw->core.width - size - sht, sht,
 320                 size, gw->core.height - 2 * sht);
 321
 322                 /***chubraev
 323                 rects[0].x = gw->core.width - size - sht; rects[0].y = sht;
 324                 rects[0].width = size; rects[0].height = gw->core.height - 2 * sht;
 325             ***/
 326             break;
 327         }
 328         /***chubraev
 329         XSetClipRectangles(XtDisplay(gw), THIS.gc, 0, 0, rects, 1, Unsorted);
 330         XSetForeground(XtDisplay(gw), THIS.gc, backgr);
 331         XDrawString(XtDisplay(gw), XtWindow(gw), THIS.gc, sht+gw->core.width/2,
 332         gw->core.height - 2 * sht, string, len);
 333         ***/
 334
 335         break;
 336         case XmVERTICAL:
 337             size = (int) ((gw->core.height - 2 * sht)*ratio);
 338             /***chubraev
 339             XDrawString(XtDisplay(gw), XtWindow(gw), THIS.gc, sht,
 340             sht+gw->core.height/2, string,len);
 341             ***/
 342             switch(THIS.processingDirection) {
 343             case XmMAX_ON_RIGHT:
 344             case XmMAX_ON_BOTTOM:
 345                 XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 346                     sht, sht, gw->core.width - 2 * sht, size);
 347
 348                     /***chubraev
 349                     rects[0].x = sht; rects[0].y = sht;
 350                     rects[0].width = gw->core.width - 2 * sht; rects[0].height = size;
 351                 ***/
 352                 break;
 353             case XmMAX_ON_LEFT:
 354             case XmMAX_ON_TOP:
 355                 XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 356                     sht, gw->core.height - size - sht,
 357                     gw->core.width - 2 * sht, size);
 358
 359                     /***chubraev
 360                     rects[0].x = sht; rects[0].y = gw->core.height - size - sht;
 361                     rects[0].width = gw->core.width - 2 * sht; rects[0].height = size;
 362                 ***/
 363             }
 364             /***chubraev
 365             XSetClipRectangles(XtDisplay(gw), THIS.gc, 0, 0, rects, 1, Unsorted);
 366             XSetForeground(XtDisplay(gw), THIS.gc, backgr);
 367             XDrawString(XtDisplay(gw), XtWindow(gw), THIS.gc, sht,
 368             sht+gw->core.height/2, string,len);
 369             ***/
 370             break;
 371     }
 372     /***chubraev
 373     XSetClipMask(XtDisplay(gw), THIS.gc, None);
 374     XSetForeground(XtDisplay(gw), THIS.gc, foregr);
 375     ***/
 376 #undef THIS
 377 }
 378
 379 /* Old code
 380 */
 381 #if 0
 382 static void
 383 DrawSlider(XmGaugeWidget gw, Boolean clear)
 384 {
 385 #define THIS gw->gauge
 386     int size, sht;
 387     /*    float ratio; */
 388
 389     sht = gw->primitive.shadow_thickness;
 390     /* See fix comment below: can cause divide by zero error.
 391     ratio = (float)((float)THIS.maximum -
 392     (float)THIS.minimum) / (float)THIS.value;
 393     */
 394     if(clear) {
 395         XClearArea(XtDisplay(gw), XtWindow(gw), sht, sht,
 396             gw->core.width - 2 * sht, gw->core.height - 2 * sht, False);
 397     }
 398     switch(THIS.orientation) {
 399     case XmHORIZONTAL:
 400         /*      size = (gw->core.width - 2 * sht) / ratio; */
 401         /* A fix suggested by Dmitri Chubraev */
 402         size = (gw->core.width - 2 * sht) /((float)THIS.maximum-(float)THIS.minimum)*(float)THIS.value;
 403         switch(THIS.processingDirection) {
 404         case XmMAX_ON_RIGHT:
 405         case XmMAX_ON_BOTTOM:
 406             XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 407                 sht, sht, size, gw->core.height - 2 * sht);
 408             break;
 409         case XmMAX_ON_LEFT:
 410         case XmMAX_ON_TOP:
 411             XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 412                 gw->core.width - size - sht, sht,
 413                 size, gw->core.height - 2 * sht);
 414             break;
 415         }
 416         break;
 417         case XmVERTICAL:
 418             size = (gw->core.height - 2 * sht) /((float)THIS.maximum-(float)THIS.minimum)*(float)THIS.value;
 419             /*  size = (gw->core.height - 2 * sht)/ ratio; */
 420             switch(THIS.processingDirection) {
 421             case XmMAX_ON_RIGHT:
 422             case XmMAX_ON_BOTTOM:
 423                 XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 424                     sht, sht, gw->core.width - 2 * sht, size);
 425                 break;
 426             case XmMAX_ON_LEFT:
 427             case XmMAX_ON_TOP:
 428                 XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 429                     sht, gw->core.height - size - sht,
 430                     gw->core.width - 2 * sht, size);
 431             }
 432             break;
 433     }
 434 #undef THIS
 435 }
 436 #endif
 437
 438 static void
 439 Initialize(Widget req, Widget new_w, ArgList args, Cardinal *num_args )
 440 {
 441     XmGaugeWidget gw = (XmGaugeWidget)new_w;
 442 #define THIS gw->gauge
 443     XGCValues values;
 444
 445     values.foreground = gw->primitive.foreground;
 446     THIS.gc = XtGetGC(new_w, GCForeground, &values);
 447
 448 #undef THIS
 449
 450 }
 451
 452
 453
 454 static void
 455 Destroy(Widget w)
 456 {
 457     XmGaugeWidget gw = (XmGaugeWidget)w;
 458 #define THIS gw->gauge
 459     XtReleaseGC(w, THIS.gc);
 460 #undef THIS
 461 }
 462
 463
 464
 465
 466 static Boolean
 467 SetValues(
 468           Widget cw,
 469           Widget rw,
 470           Widget nw,
 471           ArgList args,
 472           Cardinal *num_args )
 473 {
 474     XmGaugeWidget cgw = (XmGaugeWidget)cw;
 475     XmGaugeWidget ngw = (XmGaugeWidget)nw;
 476
 477     Boolean redraw = False;
 478     if(cgw->primitive.foreground != ngw->primitive.foreground) {
 479         XGCValues values;
 480
 481         redraw = True;
 482         XtReleaseGC(nw, ngw->gauge.gc);
 483         values.foreground = ngw->primitive.foreground;
 484         ngw->gauge.gc = XtGetGC(nw, GCForeground, &values);
 485     }
 486     if(cgw->gauge.value != ngw->gauge.value) {
 487         redraw = True;
 488     }
 489     return redraw;
 490 }
 491
 492
 493
 494
 495 static void
 496 ExposeProc(Widget w, XEvent *event, Region r)
 497 {
 498     XmGaugeWidget gw = (XmGaugeWidget)w;
 499 #define THIS gw->gauge
 500     int sht;
 501
 502     sht = gw->primitive.shadow_thickness;
 503     _XmDrawShadows(XtDisplay(w), XtWindow(w),
 504         gw->primitive.top_shadow_GC,
 505         gw->primitive.bottom_shadow_GC,
 506         0, 0, w->core.width, w->core.height,
 507         sht, XmSHADOW_IN);
 508     DrawSlider(gw, False);
 509 #undef THIS
 510 }
 511
 512
 513
 514
 515
 516 static XtResource
 517 resources[] = {
 518 #define offset(field) XtOffset(XmGaugeWidget, gauge.field)
 519     {XmNvalue, XmCValue, XtRInt, sizeof(int),
 520         offset(value), XtRImmediate, (caddr_t)10},
 521
 522     {XmNminimum, XmCValue, XtRInt, sizeof(int),
 523     offset(minimum), XtRImmediate, (caddr_t)0},
 524
 525     {XmNmaximum, XmCValue, XtRInt, sizeof(int),
 526     offset(maximum), XtRImmediate, (caddr_t)100},
 527
 528     {XmNorientation, XmCOrientation, XmROrientation, sizeof(unsigned char),
 529     offset(orientation), XtRImmediate, (caddr_t)XmVERTICAL},
 530
 531     {XmNprocessingDirection, XmCProcessingDirection,
 532     XmRProcessingDirection, sizeof(unsigned char),
 533     offset(processingDirection), XtRImmediate, (caddr_t)XmMAX_ON_RIGHT},
 534
 535     {XmNdragCallback, XmCCallback, XmRCallback, sizeof(XtCallbackList),
 536     offset(dragCallback), XtRImmediate, (caddr_t)NULL},
 537
 538     {XmNvalueChangedCallback, XmCCallback, XmRCallback, sizeof(XtCallbackList),
 539     offset(valueChangedCallback), XtRImmediate, (caddr_t)NULL},
 540
 541
 542 #undef offset
 543 };
 544
 545
 546 XmGaugeClassRec xmGaugeClassRec = {
 547     {                           /* core fields */
 548         (WidgetClass) &xmPrimitiveClassRec, /* superclass               */
 549             "XmGauge",          /* class_name           */
 550             sizeof(XmGaugeRec), /* widget_size          */
 551             NULL,                       /* class_initialize             */
 552             NULL,                       /* class_part_initialize        */
 553             FALSE,                      /* class_inited         */
 554             Initialize,         /* initialize           */
 555             NULL,                       /* initialize_hook              */
 556             XtInheritRealize,   /* realize                      */
 557             actions,            /* actions                      */
 558             XtNumber(actions),  /* num_actions          */
 559             resources,          /* resources            */
 560             XtNumber(resources),        /* num_resources                */
 561             NULLQUARK,          /* xrm_class            */
 562             TRUE,                       /* compress_motion              */
 563             TRUE,                       /* compress_exposure    */
 564             TRUE,                       /* compress_enterleave  */
 565             FALSE,                      /* visible_interest             */
 566             Destroy,            /* destroy                      */
 567             NULL,                       /* resize                       */
 568             ExposeProc,         /* expose                       */
 569             SetValues,          /* set_values           */
 570             NULL,                       /* set_values_hook              */
 571             XtInheritSetValuesAlmost, /* set_values_almost      */
 572             NULL,                       /* get_values_hook              */
 573             NULL,                       /* accept_focus         */
 574             XtVersion,          /* version                      */
 575             NULL,                       /* callback_private             */
 576             translations,               /* tm_table                     */
 577             NULL,                       /* query_geometry               */
 578             NULL,                       /* display_accelerator  */
 579             NULL                        /* extension            */
 580     },
 581                                 /* primitive_class fields */
 582     {
 583             NULL,                       /* border_highlight     */
 584                 NULL,                   /* border_unhighlight   */
 585                 NULL,                   /* translations         */
 586                 NULL,                   /* arm_and_activate     */
 587                 NULL,                   /* syn_resources        */
 588                 0,                      /* num_syn_resources    */
 589                 NULL                    /* extension            */
 590         },
 591         { /* gauge fields */
 592                 0                       /* empty                */
 593             }
 594 };
 595
 596 WidgetClass xmGaugeWidgetClass = (WidgetClass)&xmGaugeClassRec;
 597
 598
 599
 600
 601 void
 602 GaugePick(Widget w, XEvent *e, String *args, Cardinal  *num_args)
 603 {
 604     /* Commented out for a read-only gauge in wxWindows */
 605 #if 0
 606     XmGaugeWidget gw = (XmGaugeWidget)w;
 607 #define THIS gw->gauge
 608     int size, sht;
 609     float ratio;
 610     Boolean dragging = False;
 611     XButtonEvent *event = (XButtonEvent *)e;
 612     int x, y;
 613
 614     x = event->x;
 615     y = event->y;
 616     sht = gw->primitive.shadow_thickness;
 617     _XmDrawShadows(XtDisplay(w), XtWindow(w),
 618         gw->primitive.top_shadow_GC,
 619         gw->primitive.bottom_shadow_GC,
 620         0, 0, w->core.width, w->core.height,
 621         sht, XmSHADOW_IN);
 622
 623
 624     ratio = (float)((float)THIS.maximum -
 625         (float)THIS.minimum) / (float)THIS.value;
 626     switch(THIS.orientation) {
 627     case XmHORIZONTAL:
 628         size = (w->core.width - 2 * sht) / ratio;
 629         switch(THIS.processingDirection) {
 630         case XmMAX_ON_RIGHT:
 631         case XmMAX_ON_BOTTOM:
 632             dragging = (x > sht) && (y > sht) &&
 633                 (x < sht + size) && (y < w->core.height - sht);
 634             break;
 635         case XmMAX_ON_LEFT:
 636         case XmMAX_ON_TOP:
 637             dragging = (x > w->core.width - size - sht) && (y > sht) &&
 638                 (x < w->core.width - sht) && (y < w->core.height + sht);
 639             break;
 640         }
 641         break;
 642         case XmVERTICAL:
 643             size = (w->core.height - 2 * sht) / ratio;
 644             switch(THIS.processingDirection) {
 645             case XmMAX_ON_RIGHT:
 646             case XmMAX_ON_BOTTOM:
 647                 dragging = (x > sht) && (y > sht) &&
 648                     (x < w->core.width - sht) &&
 649                     (y < w->core.width - 2 * sht + size);
 650                 break;
 651             case XmMAX_ON_LEFT:
 652             case XmMAX_ON_TOP:
 653                 dragging = (x > sht) && (y > w->core.height - size - sht) &&
 654                     (x < w->core.width - sht) && (y < w->core.height - sht);
 655             }
 656             break;
 657     }
 658     THIS.dragging = dragging;
 659     THIS.oldx = x;
 660     THIS.oldy = y;
 661 #undef THIS
 662 #endif
 663 }
 664
 665 #define round(x) ( (x) > 0 ? ((x) + 0.5) : -(-(x) + 0.5) )
 666
 667 void
 668 GaugeDrag(Widget w, XEvent *e, String *args, Cardinal  *num_args)
 669 {
 670     /* Commented out for a read-only gauge in wxWindows */
 671 #if 0
 672     XmGaugeWidget gw = (XmGaugeWidget)w;
 673 #define THIS gw->gauge
 674     int sht, x, y, max, value;
 675     float ratio, nratio, size, nsize, fvalue, delta;
 676     XMotionEvent *event = (XMotionEvent *)e;
 677
 678     if( ! THIS.dragging) return;
 679
 680     x = event->x;
 681     y = event->y;
 682     sht = gw->primitive.shadow_thickness;
 683
 684     ratio = (float)THIS.value / (float)((float)THIS.maximum -
 685         (float)THIS.minimum);
 686     switch(THIS.orientation) {
 687     case XmHORIZONTAL:
 688         max = (w->core.width - 2 * sht);
 689         size = (float)max * ratio;
 690         delta =  (float)x - (float)THIS.oldx;
 691         break;
 692     case XmVERTICAL:
 693         max = (w->core.height - 2 * sht);
 694         size = (float) max * ratio;
 695         delta =  (float)y - (float)THIS.oldy;
 696         break;
 697     }
 698     switch(THIS.processingDirection) {
 699     case XmMAX_ON_RIGHT:
 700     case XmMAX_ON_BOTTOM:
 701         nsize = size + delta;
 702         break;
 703     default:
 704         nsize = size - delta;
 705     }
 706     if(nsize > (float)max) nsize = (float)max;
 707     if(nsize < (float)0 ) nsize = (float)0;
 708     nratio =  nsize / (float)max;
 709
 710     fvalue = (int)((float)THIS.maximum -
 711         (float)THIS.minimum) * (float)nsize / (float)max;
 712     value = round(fvalue);
 713
 714     THIS.value = value;
 715     THIS.oldx = x;
 716     THIS.oldy = y;
 717
 718     /* clear old slider only if it was larger */
 719     DrawSlider(gw, (nsize < size));
 720
 721     {
 722         XmGaugeCallbackStruct call;
 723
 724         if(NULL  != THIS.dragCallback) {
 725             call.reason = XmCR_DRAG;
 726             call.event = e;
 727             call.value = THIS.value;
 728             XtCallCallbacks(w, XmNdragCallback, &call);
 729         }
 730     }
 731 #undef THIS
 732 #endif
 733 }
 734
 735
 736 void
 737 GaugeDrop(Widget w, XEvent *e, String *args, Cardinal  *num_args)
 738 {
 739     /* Commented out for a read-only gauge in wxWindows */
 740 #if 0
 741     XmGaugeWidget gw = (XmGaugeWidget)w;
 742 #define THIS gw->gauge
 743     if( ! THIS.dragging) return;
 744
 745     if(NULL  != THIS.valueChangedCallback) {
 746         XmGaugeCallbackStruct call;
 747         call.reason = XmCR_VALUE_CHANGED;
 748         call.event = e;
 749         call.value = THIS.value;
 750         XtCallCallbacks(w, XmNvalueChangedCallback, &call);
 751     }
 752     THIS.dragging = False;
 753 #undef THIS
 754 #endif
 755 }
 756
 757 void
 758 XmGaugeSetValue(Widget w, int value)
 759 {
 760     XmGaugeWidget gw = (XmGaugeWidget)w;
 761
 762     gw->gauge.value = value;
 763     DrawSlider(gw, True);
 764     XFlush(XtDisplay(w));
 765 }
 766
 767 int
 768 XmGaugeGetValue(Widget w)
 769 {
 770     XmGaugeWidget gw = (XmGaugeWidget)w;
 771
 772     return gw->gauge.value;
 773 }