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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "gauge.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __VMS
  20 #include <wx/vms_x_fix.h>
  21 #undef XtDisplay
  22 #undef XtScreen
  23 #undef XtWindow
  24 #undef XtIsRealized
  25 #undef XtParent
  26 #endif
  27
  28 # include "wx/gauge.h"
  29
  30 #ifdef __VMS__
  31 #pragma message disable nosimpint
  32 #endif
  33 #include <Xm/Xm.h>
  34 #ifdef __WXMOTIF20__
  35 #include <Xm/Scale.h>
  36 #endif // __WXMOTIF20__
  37 #ifdef __VMS__
  38 #pragma message enable nosimpint
  39 #endif
  40 #include "wx/motif/private.h"
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxGauge, wxControl)
  43
  44 #if !wxCHECK_MOTIF_VERSION( 2, 0 ) || wxCHECK_LESSTIF()
  45
  46 // XmGauge copyright notice:
  47
  48 /*
  49 * Copyright 1994 GROUPE BULL
  50 *
  51 * Permission to use, copy, modify, and distribute this software and its
  52 * documentation for any purpose and without fee is hereby granted, provided
  53 * that the above copyright notice appear in all copies and that both that
  54 * copyright notice and this permission notice appear in supporting
  55 * documentation, and that the name of GROUPE BULL not be used in advertising
  56 * or publicity pertaining to distribution of the software without specific,
  57 * written prior permission.  GROUPE BULL makes no representations about the
  58 * suitability of this software for any purpose.  It is provided "as is"
  59 * without express or implied warranty.
  60 *
  61 * GROUPE BULL disclaims all warranties with regard to this software,
  62 * including all implied warranties of merchantability and fitness,
  63 * in no event shall GROUPE BULL be liable for any special,
  64 * indirect or consequential damages or any damages
  65 * whatsoever resulting from loss of use, data or profits,
  66 * whether in an action of contract, negligence or other tortious
  67 * action, arising out of or in connection with the use
  68 * or performance of this software.
  69 *
  70 */
  71
  72 //// PUBLIC XMGAUGE DECLARATIONS
  73 typedef struct _XmGaugeClassRec*        XmGaugeWidgetClass;
  74 typedef struct _XmGaugeRec*             XmGaugeWidget;
  75
  76 #ifdef __cplusplus
  77 extern "C" WidgetClass xmGaugeWidgetClass;
  78 #else
  79 extern WidgetClass xmGaugeWidgetClass;
  80 #endif
  81
  82 typedef struct _XmGaugeCallbackStruct{
  83     int reason;
  84     XEvent *event;
  85     int value;
  86 } XmGaugeCallbackStruct;
  87
  88
  89 void
  90 XmGaugeSetValue(Widget w, int value);
  91
  92 int
  93 XmGaugeGetValue(Widget w);
  94
  95 #endif // !wxCHECK_MOTIF_VERSION( 2, 0 ) || wxCHECK_LESSTIF()
  96
  97 bool wxGauge::Create(wxWindow *parent, wxWindowID id,
  98                      int range,
  99                      const wxPoint& pos,
 100                      const wxSize& size,
 101                      long style,
 102                      const wxValidator& validator,
 103                      const wxString& name)
 104 {
 105     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
 106         return false;
 107
 108     Widget parentWidget = (Widget) parent->GetClientWidget();
 109
 110     Arg args[7];
 111     int count = 4;
 112     if (style & wxGA_HORIZONTAL)
 113     {
 114         XtSetArg (args[0], XmNorientation, XmHORIZONTAL);
 115         XtSetArg (args[1], XmNprocessingDirection, XmMAX_ON_RIGHT);
 116     }
 117     else
 118     {
 119         XtSetArg (args[0], XmNorientation, XmVERTICAL);
 120         XtSetArg (args[1], XmNprocessingDirection, XmMAX_ON_TOP);
 121     }
 122     XtSetArg(args[2], XmNminimum, 0);
 123     XtSetArg(args[3], XmNmaximum, range);
 124 #if wxCHECK_MOTIF_VERSION( 2, 0 ) && !wxCHECK_LESSTIF()
 125     XtSetArg(args[4], XmNeditable, False); ++count;
 126     XtSetArg(args[5], XmNslidingMode, XmTHERMOMETER); ++count;
 127     // XtSetArg(args[6], XmNsliderVisual, XmFOREGROUND_COLOR ); ++count;
 128     Widget gaugeWidget =
 129         XtCreateManagedWidget("gauge", xmScaleWidgetClass,
 130                               parentWidget, args, count);
 131 #else
 132     Widget gaugeWidget =
 133         XtCreateManagedWidget("gauge", xmGaugeWidgetClass,
 134                               parentWidget, args, count);
 135 #endif
 136     m_mainWidget = (WXWidget) gaugeWidget ;
 137
 138     XtManageChild (gaugeWidget);
 139
 140     int x = pos.x; int y = pos.y;
 141     wxSize best = GetBestSize();
 142     if( size.x != -1 ) best.x = size.x;
 143     if( size.y != -1 ) best.y = size.y;
 144
 145     ChangeFont(FALSE);
 146
 147     AttachWidget (parent, m_mainWidget, (WXWidget) NULL, x, y,
 148                   best.x, best.y);
 149
 150     ChangeBackgroundColour();
 151
 152     return TRUE;
 153 }
 154
 155 wxSize wxGauge::DoGetBestSize() const
 156 {
 157     if( HasFlag(wxGA_HORIZONTAL) )
 158         return wxSize( 100, 18 );
 159     else
 160         return wxSize( 18, 100 );
 161 }
 162
 163 void wxGauge::SetShadowWidth(int w)
 164 {
 165     if (w == 0)
 166         w = 1;
 167     XtVaSetValues((Widget) m_mainWidget, XmNshadowThickness, w, NULL);
 168 }
 169
 170 void wxGauge::SetRange(int r)
 171 {
 172     XtVaSetValues((Widget) m_mainWidget, XmNmaximum, r, NULL);
 173 }
 174
 175 void wxGauge::SetValue(int pos)
 176 {
 177     XtVaSetValues((Widget) m_mainWidget, XmNvalue, pos, NULL);
 178 }
 179
 180 int wxGauge::GetShadowWidth() const
 181 {
 182     Dimension w;
 183     XtVaGetValues((Widget) m_mainWidget, XmNshadowThickness, &w, NULL);
 184     return (int)w;
 185 }
 186
 187 int wxGauge::GetRange() const
 188 {
 189     int r;
 190     XtVaGetValues((Widget) m_mainWidget, XmNmaximum, &r, NULL);
 191     return (int)r;
 192 }
 193
 194 int wxGauge::GetValue() const
 195 {
 196     int pos;
 197     XtVaGetValues((Widget) m_mainWidget, XmNvalue, &pos, NULL);
 198     return pos;
 199 }
 200
 201 void wxGauge::DoMoveWindow(int x, int y, int width, int height)
 202 {
 203     wxGaugeBase::DoMoveWindow( x, y, width, height );
 204 #ifdef __WXMOTIF20__
 205     XtVaSetValues( (Widget)m_mainWidget,
 206                    XmNscaleHeight, height,
 207                    NULL );
 208 #endif
 209 }
 210
 211 #if !wxCHECK_MOTIF_VERSION( 2, 0 ) || wxCHECK_LESSTIF()
 212
 213 //// PRIVATE DECLARATIONS FOR XMGAUGE
 214
 215 #include <Xm/PrimitiveP.h>
 216 #include <Xm/DrawP.h>
 217
 218 typedef struct {
 219     int empty;
 220 } XmGaugeClassPart;
 221
 222 typedef struct _XmGaugeClassRec {
 223     CoreClassPart               core_class;
 224     XmPrimitiveClassPart        primitive_class;
 225     XmGaugeClassPart            gauge_class;
 226 } XmGaugeClassRec;
 227
 228
 229 typedef struct _XmGaugePart{
 230     int value;
 231     int minimum;
 232     int maximum;
 233     unsigned char orientation;
 234     unsigned char processingDirection;
 235
 236     XtCallbackList dragCallback;
 237     XtCallbackList valueChangedCallback;
 238
 239     /* private fields */
 240     Boolean dragging;           /* drag in progress ? */
 241     int oldx, oldy;
 242     GC gc;
 243 } XmGaugePart;
 244
 245
 246 typedef struct _XmGaugeRec {
 247     CorePart            core;
 248     XmPrimitivePart     primitive;
 249     XmGaugePart         gauge;
 250 } XmGaugeRec;
 251
 252 extern XmGaugeClassRec xmGaugeClassRec;
 253
 254 /* Copyright 1994 GROUPE BULL -- See license conditions in file COPYRIGHT */
 255
 256 //// XMGAUGE IMPLEMENTATION
 257
 258 void
 259 GaugePick(Widget w, XEvent *e, String *args, Cardinal  *num_args);
 260 void
 261 GaugeDrag(Widget w, XEvent *e, String *args, Cardinal  *num_args);
 262 void
 263 GaugeDrop(Widget w, XEvent *e, String *args, Cardinal  *num_args);
 264
 265
 266
 267 static char translations[] =
 268 "<Btn1Down>: GaugePick()\n\
 269                             <Btn1Motion>: GaugeDrag()\n\
 270                             <Btn1Up>: GaugeDrop()\n\
 271                             ";
 272
 273
 274
 275 static XtActionsRec actions[] = {
 276     {"GaugePick", GaugePick},
 277     {"GaugeDrag", GaugeDrag},
 278     {"GaugeDrop", GaugeDrop},
 279 };
 280
 281 static void
 282 DrawSlider(XmGaugeWidget gw, Boolean clear)
 283 {
 284 #define THIS gw->gauge
 285     int size, sht;
 286     float ratio;
 287     /***chubraev
 288     char string[20];
 289     int len;
 290     unsigned long backgr,foregr;
 291     XRectangle rects[1];
 292     ***/
 293
 294     sht = gw->primitive.shadow_thickness;
 295
 296     ratio =  (float)THIS.value/
 297         (float)(THIS.maximum - THIS.minimum);
 298         /***chubraev
 299         sprintf(string,"%-d%%",(int)(ratio*100));
 300         len=strlen(string);
 301         XtVaGetValues(gw,XmNbackground,&backgr,XmNforeground,&foregr,NULL);
 302     ***/
 303
 304     if(clear) {
 305         XClearArea(XtDisplay(gw), XtWindow(gw), sht, sht,
 306             gw->core.width - 2 * sht, gw->core.height - 2 * sht, False);
 307     }
 308     switch(THIS.orientation) {
 309     case XmHORIZONTAL:
 310         size = (int) ((gw->core.width - 2 * sht)*ratio);
 311         /***chubraev
 312         XDrawString(XtDisplay(gw), XtWindow(gw), THIS.gc, sht+gw->core.width/2,
 313         gw->core.height - 2 * sht, string, len);
 314         ***/
 315         switch(THIS.processingDirection) {
 316         case XmMAX_ON_RIGHT:
 317         case XmMAX_ON_BOTTOM:
 318             XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 319                 sht, sht, size, gw->core.height - 2 * sht);
 320
 321                 /***chubraev
 322                 rects[0].x = sht; rects[0].y = sht;
 323                 rects[0].width = size; rects[0].height = gw->core.height - 2 * sht;
 324             ***/
 325             break;
 326         case XmMAX_ON_LEFT:
 327         case XmMAX_ON_TOP:
 328             XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 329                 gw->core.width - size - sht, sht,
 330                 size, gw->core.height - 2 * sht);
 331
 332                 /***chubraev
 333                 rects[0].x = gw->core.width - size - sht; rects[0].y = sht;
 334                 rects[0].width = size; rects[0].height = gw->core.height - 2 * sht;
 335             ***/
 336             break;
 337         }
 338         /***chubraev
 339         XSetClipRectangles(XtDisplay(gw), THIS.gc, 0, 0, rects, 1, Unsorted);
 340         XSetForeground(XtDisplay(gw), THIS.gc, backgr);
 341         XDrawString(XtDisplay(gw), XtWindow(gw), THIS.gc, sht+gw->core.width/2,
 342         gw->core.height - 2 * sht, string, len);
 343         ***/
 344
 345         break;
 346         case XmVERTICAL:
 347             size = (int) ((gw->core.height - 2 * sht)*ratio);
 348             /***chubraev
 349             XDrawString(XtDisplay(gw), XtWindow(gw), THIS.gc, sht,
 350             sht+gw->core.height/2, string,len);
 351             ***/
 352             switch(THIS.processingDirection) {
 353             case XmMAX_ON_RIGHT:
 354             case XmMAX_ON_BOTTOM:
 355                 XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 356                     sht, sht, gw->core.width - 2 * sht, size);
 357
 358                     /***chubraev
 359                     rects[0].x = sht; rects[0].y = sht;
 360                     rects[0].width = gw->core.width - 2 * sht; rects[0].height = size;
 361                 ***/
 362                 break;
 363             case XmMAX_ON_LEFT:
 364             case XmMAX_ON_TOP:
 365                 XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 366                     sht, gw->core.height - size - sht,
 367                     gw->core.width - 2 * sht, size);
 368
 369                     /***chubraev
 370                     rects[0].x = sht; rects[0].y = gw->core.height - size - sht;
 371                     rects[0].width = gw->core.width - 2 * sht; rects[0].height = size;
 372                 ***/
 373             }
 374             /***chubraev
 375             XSetClipRectangles(XtDisplay(gw), THIS.gc, 0, 0, rects, 1, Unsorted);
 376             XSetForeground(XtDisplay(gw), THIS.gc, backgr);
 377             XDrawString(XtDisplay(gw), XtWindow(gw), THIS.gc, sht,
 378             sht+gw->core.height/2, string,len);
 379             ***/
 380             break;
 381     }
 382     /***chubraev
 383     XSetClipMask(XtDisplay(gw), THIS.gc, None);
 384     XSetForeground(XtDisplay(gw), THIS.gc, foregr);
 385     ***/
 386 #undef THIS
 387 }
 388
 389 /* Old code
 390 */
 391 #if 0
 392 static void
 393 DrawSlider(XmGaugeWidget gw, Boolean clear)
 394 {
 395 #define THIS gw->gauge
 396     int size, sht;
 397     /*    float ratio; */
 398
 399     sht = gw->primitive.shadow_thickness;
 400     /* See fix comment below: can cause divide by zero error.
 401     ratio = (float)((float)THIS.maximum -
 402     (float)THIS.minimum) / (float)THIS.value;
 403     */
 404     if(clear) {
 405         XClearArea(XtDisplay(gw), XtWindow(gw), sht, sht,
 406             gw->core.width - 2 * sht, gw->core.height - 2 * sht, False);
 407     }
 408     switch(THIS.orientation) {
 409     case XmHORIZONTAL:
 410         /*      size = (gw->core.width - 2 * sht) / ratio; */
 411         /* A fix suggested by Dmitri Chubraev */
 412         size = (gw->core.width - 2 * sht) /((float)THIS.maximum-(float)THIS.minimum)*(float)THIS.value;
 413         switch(THIS.processingDirection) {
 414         case XmMAX_ON_RIGHT:
 415         case XmMAX_ON_BOTTOM:
 416             XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 417                 sht, sht, size, gw->core.height - 2 * sht);
 418             break;
 419         case XmMAX_ON_LEFT:
 420         case XmMAX_ON_TOP:
 421             XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 422                 gw->core.width - size - sht, sht,
 423                 size, gw->core.height - 2 * sht);
 424             break;
 425         }
 426         break;
 427         case XmVERTICAL:
 428             size = (gw->core.height - 2 * sht) /((float)THIS.maximum-(float)THIS.minimum)*(float)THIS.value;
 429             /*  size = (gw->core.height - 2 * sht)/ ratio; */
 430             switch(THIS.processingDirection) {
 431             case XmMAX_ON_RIGHT:
 432             case XmMAX_ON_BOTTOM:
 433                 XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 434                     sht, sht, gw->core.width - 2 * sht, size);
 435                 break;
 436             case XmMAX_ON_LEFT:
 437             case XmMAX_ON_TOP:
 438                 XFillRectangle(XtDisplay(gw), XtWindow(gw), THIS.gc,
 439                     sht, gw->core.height - size - sht,
 440                     gw->core.width - 2 * sht, size);
 441             }
 442             break;
 443     }
 444 #undef THIS
 445 }
 446 #endif
 447
 448 static void
 449 Initialize(Widget WXUNUSED(req), Widget new_w, ArgList WXUNUSED(args), Cardinal *WXUNUSED(num_args ))
 450 {
 451     XmGaugeWidget gw = (XmGaugeWidget)new_w;
 452 #define THIS gw->gauge
 453     XGCValues values;
 454
 455     values.foreground = gw->primitive.foreground;
 456     THIS.gc = XtGetGC(new_w, GCForeground, &values);
 457
 458 #undef THIS
 459
 460 }
 461
 462
 463
 464 static void
 465 Destroy(Widget w)
 466 {
 467     XmGaugeWidget gw = (XmGaugeWidget)w;
 468 #define THIS gw->gauge
 469     XtReleaseGC(w, THIS.gc);
 470 #undef THIS
 471 }
 472
 473
 474
 475
 476 static Boolean
 477 SetValues(
 478           Widget cw,
 479           Widget WXUNUSED(rw),
 480           Widget nw,
 481           ArgList WXUNUSED(args),
 482           Cardinal *WXUNUSED(num_args) )
 483 {
 484     XmGaugeWidget cgw = (XmGaugeWidget)cw;
 485     XmGaugeWidget ngw = (XmGaugeWidget)nw;
 486
 487     Boolean redraw = False;
 488     if(cgw->primitive.foreground != ngw->primitive.foreground) {
 489         XGCValues values;
 490
 491         redraw = True;
 492         XtReleaseGC(nw, ngw->gauge.gc);
 493         values.foreground = ngw->primitive.foreground;
 494         ngw->gauge.gc = XtGetGC(nw, GCForeground, &values);
 495     }
 496     if(cgw->gauge.value != ngw->gauge.value) {
 497         redraw = True;
 498     }
 499     return redraw;
 500 }
 501
 502
 503
 504
 505 static void
 506 ExposeProc(Widget w, XEvent *WXUNUSED(event), Region WXUNUSED(r))
 507 {
 508     XmGaugeWidget gw = (XmGaugeWidget)w;
 509 #define THIS gw->gauge
 510     int sht;
 511
 512     sht = gw->primitive.shadow_thickness;
 513     _XmDrawShadows(XtDisplay(w), XtWindow(w),
 514         gw->primitive.top_shadow_GC,
 515         gw->primitive.bottom_shadow_GC,
 516         0, 0, w->core.width, w->core.height,
 517         sht, XmSHADOW_IN);
 518     DrawSlider(gw, False);
 519 #undef THIS
 520 }
 521
 522
 523
 524
 525
 526 static XtResource
 527 resources[] = {
 528 #define offset(field) XtOffset(XmGaugeWidget, gauge.field)
 529     {XmNvalue, XmCValue, XtRInt, sizeof(int),
 530         offset(value), XtRImmediate, (caddr_t)10},
 531
 532     {XmNminimum, XmCValue, XtRInt, sizeof(int),
 533     offset(minimum), XtRImmediate, (caddr_t)0},
 534
 535     {XmNmaximum, XmCValue, XtRInt, sizeof(int),
 536     offset(maximum), XtRImmediate, (caddr_t)100},
 537
 538     {XmNorientation, XmCOrientation, XmROrientation, sizeof(unsigned char),
 539     offset(orientation), XtRImmediate, (caddr_t)XmVERTICAL},
 540
 541     {XmNprocessingDirection, XmCProcessingDirection,
 542     XmRProcessingDirection, sizeof(unsigned char),
 543     offset(processingDirection), XtRImmediate, (caddr_t)XmMAX_ON_RIGHT},
 544
 545     {XmNdragCallback, XmCCallback, XmRCallback, sizeof(XtCallbackList),
 546     offset(dragCallback), XtRImmediate, (caddr_t)NULL},
 547
 548     {XmNvalueChangedCallback, XmCCallback, XmRCallback, sizeof(XtCallbackList),
 549     offset(valueChangedCallback), XtRImmediate, (caddr_t)NULL},
 550
 551
 552 #undef offset
 553 };
 554
 555
 556 XmGaugeClassRec xmGaugeClassRec = {
 557     {                           /* core fields */
 558         (WidgetClass) &xmPrimitiveClassRec, /* superclass               */
 559             "XmGauge",          /* class_name           */
 560             sizeof(XmGaugeRec), /* widget_size          */
 561             NULL,                       /* class_initialize             */
 562             NULL,                       /* class_part_initialize        */
 563             FALSE,                      /* class_inited         */
 564             Initialize,         /* initialize           */
 565             NULL,                       /* initialize_hook              */
 566             XtInheritRealize,   /* realize                      */
 567             actions,            /* actions                      */
 568             XtNumber(actions),  /* num_actions          */
 569             resources,          /* resources            */
 570             XtNumber(resources),        /* num_resources                */
 571             NULLQUARK,          /* xrm_class            */
 572             TRUE,                       /* compress_motion              */
 573             TRUE,                       /* compress_exposure    */
 574             TRUE,                       /* compress_enterleave  */
 575             FALSE,                      /* visible_interest             */
 576             Destroy,            /* destroy                      */
 577             NULL,                       /* resize                       */
 578             ExposeProc,         /* expose                       */
 579             SetValues,          /* set_values           */
 580             NULL,                       /* set_values_hook              */
 581             XtInheritSetValuesAlmost, /* set_values_almost      */
 582             NULL,                       /* get_values_hook              */
 583             NULL,                       /* accept_focus         */
 584             XtVersion,          /* version                      */
 585             NULL,                       /* callback_private             */
 586             translations,               /* tm_table                     */
 587             NULL,                       /* query_geometry               */
 588             NULL,                       /* display_accelerator  */
 589             NULL                        /* extension            */
 590     },
 591                                 /* primitive_class fields */
 592     {
 593             NULL,                       /* border_highlight     */
 594                 NULL,                   /* border_unhighlight   */
 595                 NULL,                   /* translations         */
 596                 NULL,                   /* arm_and_activate     */
 597                 NULL,                   /* syn_resources        */
 598                 0,                      /* num_syn_resources    */
 599                 NULL                    /* extension            */
 600         },
 601         { /* gauge fields */
 602                 0                       /* empty                */
 603             }
 604 };
 605
 606 WidgetClass xmGaugeWidgetClass = (WidgetClass)&xmGaugeClassRec;
 607
 608
 609
 610
 611 void
 612 GaugePick(Widget WXUNUSED(w), XEvent *WXUNUSED(e), String *WXUNUSED(args), Cardinal  *WXUNUSED(num_args))
 613 {
 614     /* Commented out for a read-only gauge in wxWidgets */
 615 #if 0
 616     XmGaugeWidget gw = (XmGaugeWidget)w;
 617 #define THIS gw->gauge
 618     int size, sht;
 619     float ratio;
 620     Boolean dragging = False;
 621     XButtonEvent *event = (XButtonEvent *)e;
 622     int x, y;
 623
 624     x = event->x;
 625     y = event->y;
 626     sht = gw->primitive.shadow_thickness;
 627     _XmDrawShadows(XtDisplay(w), XtWindow(w),
 628         gw->primitive.top_shadow_GC,
 629         gw->primitive.bottom_shadow_GC,
 630         0, 0, w->core.width, w->core.height,
 631         sht, XmSHADOW_IN);
 632
 633
 634     ratio = (float)((float)THIS.maximum -
 635         (float)THIS.minimum) / (float)THIS.value;
 636     switch(THIS.orientation) {
 637     case XmHORIZONTAL:
 638         size = (w->core.width - 2 * sht) / ratio;
 639         switch(THIS.processingDirection) {
 640         case XmMAX_ON_RIGHT:
 641         case XmMAX_ON_BOTTOM:
 642             dragging = (x > sht) && (y > sht) &&
 643                 (x < sht + size) && (y < w->core.height - sht);
 644             break;
 645         case XmMAX_ON_LEFT:
 646         case XmMAX_ON_TOP:
 647             dragging = (x > w->core.width - size - sht) && (y > sht) &&
 648                 (x < w->core.width - sht) && (y < w->core.height + sht);
 649             break;
 650         }
 651         break;
 652         case XmVERTICAL:
 653             size = (w->core.height - 2 * sht) / ratio;
 654             switch(THIS.processingDirection) {
 655             case XmMAX_ON_RIGHT:
 656             case XmMAX_ON_BOTTOM:
 657                 dragging = (x > sht) && (y > sht) &&
 658                     (x < w->core.width - sht) &&
 659                     (y < w->core.width - 2 * sht + size);
 660                 break;
 661             case XmMAX_ON_LEFT:
 662             case XmMAX_ON_TOP:
 663                 dragging = (x > sht) && (y > w->core.height - size - sht) &&
 664                     (x < w->core.width - sht) && (y < w->core.height - sht);
 665             }
 666             break;
 667     }
 668     THIS.dragging = dragging;
 669     THIS.oldx = x;
 670     THIS.oldy = y;
 671 #undef THIS
 672 #endif
 673 }
 674
 675 #define round(x) ( (x) > 0 ? ((x) + 0.5) : -(-(x) + 0.5) )
 676
 677 void
 678 GaugeDrag(Widget WXUNUSED(w), XEvent *WXUNUSED(e), String *WXUNUSED(args), Cardinal  *WXUNUSED(num_args))
 679 {
 680     /* Commented out for a read-only gauge in wxWidgets */
 681 #if 0
 682     XmGaugeWidget gw = (XmGaugeWidget)w;
 683 #define THIS gw->gauge
 684     int sht, x, y, max, value;
 685     float ratio, nratio, size, nsize, fvalue, delta;
 686     XMotionEvent *event = (XMotionEvent *)e;
 687
 688     if( ! THIS.dragging) return;
 689
 690     x = event->x;
 691     y = event->y;
 692     sht = gw->primitive.shadow_thickness;
 693
 694     ratio = (float)THIS.value / (float)((float)THIS.maximum -
 695         (float)THIS.minimum);
 696     switch(THIS.orientation) {
 697     case XmHORIZONTAL:
 698         max = (w->core.width - 2 * sht);
 699         size = (float)max * ratio;
 700         delta =  (float)x - (float)THIS.oldx;
 701         break;
 702     case XmVERTICAL:
 703         max = (w->core.height - 2 * sht);
 704         size = (float) max * ratio;
 705         delta =  (float)y - (float)THIS.oldy;
 706         break;
 707     }
 708     switch(THIS.processingDirection) {
 709     case XmMAX_ON_RIGHT:
 710     case XmMAX_ON_BOTTOM:
 711         nsize = size + delta;
 712         break;
 713     default:
 714         nsize = size - delta;
 715     }
 716     if(nsize > (float)max) nsize = (float)max;
 717     if(nsize < (float)0 ) nsize = (float)0;
 718     nratio =  nsize / (float)max;
 719
 720     fvalue = (int)((float)THIS.maximum -
 721         (float)THIS.minimum) * (float)nsize / (float)max;
 722     value = round(fvalue);
 723
 724     THIS.value = value;
 725     THIS.oldx = x;
 726     THIS.oldy = y;
 727
 728     /* clear old slider only if it was larger */
 729     DrawSlider(gw, (nsize < size));
 730
 731     {
 732         XmGaugeCallbackStruct call;
 733
 734         if(NULL  != THIS.dragCallback) {
 735             call.reason = XmCR_DRAG;
 736             call.event = e;
 737             call.value = THIS.value;
 738             XtCallCallbacks(w, XmNdragCallback, &call);
 739         }
 740     }
 741 #undef THIS
 742 #endif
 743 }
 744
 745
 746 void
 747 GaugeDrop(Widget WXUNUSED(w), XEvent *WXUNUSED(e), String *WXUNUSED(args), Cardinal  *WXUNUSED(num_args))
 748 {
 749     /* Commented out for a read-only gauge in wxWidgets */
 750 #if 0
 751     XmGaugeWidget gw = (XmGaugeWidget)w;
 752 #define THIS gw->gauge
 753     if( ! THIS.dragging) return;
 754
 755     if(NULL  != THIS.valueChangedCallback) {
 756         XmGaugeCallbackStruct call;
 757         call.reason = XmCR_VALUE_CHANGED;
 758         call.event = e;
 759         call.value = THIS.value;
 760         XtCallCallbacks(w, XmNvalueChangedCallback, &call);
 761     }
 762     THIS.dragging = False;
 763 #undef THIS
 764 #endif
 765 }
 766
 767 void
 768 XmGaugeSetValue(Widget w, int value)
 769 {
 770     XmGaugeWidget gw = (XmGaugeWidget)w;
 771
 772     gw->gauge.value = value;
 773     DrawSlider(gw, True);
 774     XFlush(XtDisplay(w));
 775 }
 776
 777 int
 778 XmGaugeGetValue(Widget w)
 779 {
 780     XmGaugeWidget gw = (XmGaugeWidget)w;
 781
 782     return gw->gauge.value;
 783 }
 784
 785 #endif // !wxCHECK_MOTIF_VERSION( 2, 0 ) || wxCHECK_LESSTIF()