src/motif/utils.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        utils.cpp
   3 // Purpose:     Various utilities
   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 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __VMS
  24 #define XtDisplay XTDISPLAY
  25 #endif
  26
  27 #include "wx/setup.h"
  28 #include "wx/utils.h"
  29 #include "wx/apptrait.h"
  30 #include "wx/app.h"
  31 #include "wx/dcmemory.h"
  32 #include "wx/bitmap.h"
  33 #include "wx/evtloop.h"
  34
  35 #include <string.h>
  36
  37 #if (defined(__SUNCC__) || defined(__CLCC__))
  38     #include <sysent.h>
  39 #endif
  40
  41 #ifdef __VMS__
  42 #pragma message disable nosimpint
  43 #endif
  44
  45 #include "wx/unix/execute.h"
  46
  47 #include <Xm/Xm.h>
  48 #include <Xm/Frame.h>
  49
  50 #include "wx/motif/private.h"
  51
  52 #if wxUSE_RESOURCES
  53 #include "X11/Xresource.h"
  54 #endif
  55
  56 #include "X11/Xutil.h"
  57
  58 #ifdef __VMS__
  59 #pragma message enable nosimpint
  60 #endif
  61
  62 // ----------------------------------------------------------------------------
  63 // private functions
  64 // ----------------------------------------------------------------------------
  65
  66 // Yuck this is really BOTH site and platform dependent
  67 // so we should use some other strategy!
  68 #ifdef sun
  69     #define DEFAULT_XRESOURCE_DIR "/usr/openwin/lib/app-defaults"
  70 #else
  71     #define DEFAULT_XRESOURCE_DIR "/usr/lib/X11/app-defaults"
  72 #endif
  73
  74 #if wxUSE_RESOURCES
  75 static char *GetIniFile (char *dest, const char *filename);
  76 #endif
  77
  78 // ============================================================================
  79 // implementation
  80 // ============================================================================
  81
  82 // ----------------------------------------------------------------------------
  83 // async event processing
  84 // ----------------------------------------------------------------------------
  85
  86 // Consume all events until no more left
  87 void wxFlushEvents(WXDisplay* wxdisplay)
  88 {
  89     Display *display = (Display*)wxdisplay;
  90     wxEventLoop evtLoop;
  91
  92     XSync (display, FALSE);
  93
  94     while (evtLoop.Pending())
  95     {
  96         XFlush (display);
  97         evtLoop.Dispatch();
  98     }
  99 }
 100
 101 // ----------------------------------------------------------------------------
 102 // wxExecute stuff
 103 // ----------------------------------------------------------------------------
 104
 105 static void xt_notify_end_process(XtPointer data, int *WXUNUSED(fid),
 106                                   XtInputId *id)
 107 {
 108     wxEndProcessData *proc_data = (wxEndProcessData *)data;
 109
 110     wxHandleProcessTermination(proc_data);
 111
 112     // VZ: I think they should be the same...
 113     wxASSERT( (int)*id == proc_data->tag );
 114
 115     XtRemoveInput(*id);
 116 }
 117
 118 int wxAddProcessCallback(wxEndProcessData *proc_data, int fd)
 119 {
 120     XtInputId id = XtAppAddInput((XtAppContext) wxTheApp->GetAppContext(),
 121                                  fd,
 122                                  (XtPointer *) XtInputReadMask,
 123                                  (XtInputCallbackProc) xt_notify_end_process,
 124                                  (XtPointer) proc_data);
 125
 126     return (int)id;
 127 }
 128
 129 // ----------------------------------------------------------------------------
 130 // misc
 131 // ----------------------------------------------------------------------------
 132
 133 // Emit a beeeeeep
 134 #ifndef __EMX__
 135 // on OS/2, we use the wxBell from wxBase library (src/os2/utils.cpp)
 136 void wxBell()
 137 {
 138     // Use current setting for the bell
 139     XBell (wxGlobalDisplay(), 0);
 140 }
 141 #endif
 142
 143 wxToolkitInfo& wxGUIAppTraits::GetToolkitInfo()
 144 {
 145     static wxToolkitInfo info;
 146
 147     info.shortName = _T("motif");
 148     info.name = _T("wxMotif");
 149 #ifdef __WXUNIVERSAL__
 150     info.shortName << _T("univ");
 151     info.name << _T("/wxUniversal");
 152 #endif
 153     // FIXME TODO
 154     // This code is WRONG!! Does NOT return the
 155     // Motif version of the libs but the X protocol
 156     // version!
 157     Display *display = wxGlobalDisplay();
 158     info.versionMajor = ProtocolVersion (display);
 159     info.versionMinor = ProtocolRevision (display);
 160     info.os = wxMOTIF_X;
 161     return info;
 162 }
 163
 164 // ----------------------------------------------------------------------------
 165 // Reading and writing resources (eg WIN.INI, .Xdefaults)
 166 // ----------------------------------------------------------------------------
 167
 168 #if wxUSE_RESOURCES
 169
 170 // Read $HOME for what it says is home, if not
 171 // read $USER or $LOGNAME for user name else determine
 172 // the Real User, then determine the Real home dir.
 173 static char * GetIniFile (char *dest, const char *filename)
 174 {
 175     char *home = NULL;
 176     if (filename && wxIsAbsolutePath(filename))
 177     {
 178         strcpy(dest, filename);
 179     }
 180     else if ((home = wxGetUserHome("")) != NULL)
 181     {
 182         strcpy(dest, home);
 183         if (dest[strlen(dest) - 1] != '/')
 184             strcat (dest, "/");
 185         if (filename == NULL)
 186         {
 187             if ((filename = getenv ("XENVIRONMENT")) == NULL)
 188                 filename = ".Xdefaults";
 189         }
 190         else if (*filename != '.')
 191             strcat (dest, ".");
 192         strcat (dest, filename);
 193     } else
 194     {
 195         dest[0] = '\0';
 196     }
 197     return dest;
 198 }
 199
 200 static char *GetResourcePath(char *buf, const char *name, bool create = FALSE)
 201 {
 202     if (create && wxFileExists (name) ) {
 203         strcpy(buf, name);
 204         return buf; // Exists so ...
 205     }
 206
 207     if (*name == '/')
 208         strcpy(buf, name);
 209     else {
 210         // Put in standard place for resource files if not absolute
 211         strcpy (buf, DEFAULT_XRESOURCE_DIR);
 212         strcat (buf, "/");
 213         strcat (buf, wxFileNameFromPath (name).c_str());
 214     }
 215
 216     if (create) {
 217         // Touch the file to create it
 218         FILE *fd = fopen (buf, "w");
 219         if (fd) fclose (fd);
 220     }
 221     return buf;
 222 }
 223
 224 /*
 225 * We have a cache for writing different resource files,
 226 * which will only get flushed when we call wxFlushResources().
 227 * Build up a list of resource databases waiting to be written.
 228 *
 229 */
 230
 231 wxList wxResourceCache (wxKEY_STRING);
 232
 233 void
 234 wxFlushResources (void)
 235 {
 236     char nameBuffer[512];
 237
 238     wxNode *node = wxResourceCache.First ();
 239     while (node)
 240     {
 241         const char *file = node->GetKeyString();
 242         // If file doesn't exist, create it first.
 243         (void)GetResourcePath(nameBuffer, file, TRUE);
 244
 245         XrmDatabase database = (XrmDatabase) node->Data ();
 246         XrmPutFileDatabase (database, nameBuffer);
 247         XrmDestroyDatabase (database);
 248         wxNode *next = node->Next ();
 249         delete node;
 250         node = next;
 251     }
 252 }
 253
 254 static XrmDatabase wxResourceDatabase = 0;
 255
 256 void wxXMergeDatabases (wxApp * theApp, Display * display);
 257
 258 bool wxWriteResource(const wxString& section, const wxString& entry, const wxString& value, const wxString& file)
 259 {
 260     char buffer[500];
 261
 262     (void) GetIniFile (buffer, file);
 263
 264     XrmDatabase database;
 265     wxNode *node = wxResourceCache.Find (buffer);
 266     if (node)
 267         database = (XrmDatabase) node->Data ();
 268     else
 269     {
 270         database = XrmGetFileDatabase (buffer);
 271         wxResourceCache.Append (buffer, (wxObject *) database);
 272     }
 273
 274     char resName[300];
 275     strcpy (resName, section.c_str());
 276     strcat (resName, ".");
 277     strcat (resName, entry.c_str());
 278
 279     XrmPutStringResource (&database, resName, value);
 280     return true;
 281 }
 282
 283 bool wxWriteResource(const wxString& section, const wxString& entry, float value, const wxString& file)
 284 {
 285     char buf[50];
 286     sprintf(buf, "%.4f", value);
 287     return wxWriteResource(section, entry, buf, file);
 288 }
 289
 290 bool wxWriteResource(const wxString& section, const wxString& entry, long value, const wxString& file)
 291 {
 292     char buf[50];
 293     sprintf(buf, "%ld", value);
 294     return wxWriteResource(section, entry, buf, file);
 295 }
 296
 297 bool wxWriteResource(const wxString& section, const wxString& entry, int value, const wxString& file)
 298 {
 299     char buf[50];
 300     sprintf(buf, "%d", value);
 301     return wxWriteResource(section, entry, buf, file);
 302 }
 303
 304 bool wxGetResource(const wxString& section, const wxString& entry, char **value, const wxString& file)
 305 {
 306     if (!wxResourceDatabase)
 307     {
 308         Display *display = wxGlobalDisplay();
 309         wxXMergeDatabases (wxTheApp, display);
 310     }
 311
 312     XrmDatabase database;
 313
 314     if (file != "")
 315     {
 316         char buffer[500];
 317
 318         // Is this right? Trying to get it to look in the user's
 319         // home directory instead of current directory -- JACS
 320         (void) GetIniFile (buffer, file);
 321
 322         wxNode *node = wxResourceCache.Find (buffer);
 323         if (node)
 324             database = (XrmDatabase) node->Data ();
 325         else
 326         {
 327             database = XrmGetFileDatabase (buffer);
 328             wxResourceCache.Append (buffer, (wxObject *) database);
 329         }
 330     }
 331     else
 332         database = wxResourceDatabase;
 333
 334     XrmValue xvalue;
 335     char *str_type[20];
 336     char buf[150];
 337     strcpy (buf, section);
 338     strcat (buf, ".");
 339     strcat (buf, entry);
 340
 341     Bool success = XrmGetResource (database, buf, "*", str_type,
 342         &xvalue);
 343     // Try different combinations of upper/lower case, just in case...
 344     if (!success)
 345     {
 346         buf[0] = (isupper (buf[0]) ? tolower (buf[0]) : toupper (buf[0]));
 347         success = XrmGetResource (database, buf, "*", str_type,
 348             &xvalue);
 349     }
 350     if (success)
 351     {
 352         if (*value)
 353             delete[] *value;
 354
 355         *value = new char[xvalue.size + 1];
 356         strncpy (*value, xvalue.addr, (int) xvalue.size);
 357         return true;
 358     }
 359     return FALSE;
 360 }
 361
 362 bool wxGetResource(const wxString& section, const wxString& entry, float *value, const wxString& file)
 363 {
 364     char *s = NULL;
 365     bool succ = wxGetResource(section, entry, (char **)&s, file);
 366     if (succ)
 367     {
 368         *value = (float)strtod(s, NULL);
 369         delete[] s;
 370         return true;
 371     }
 372     else return FALSE;
 373 }
 374
 375 bool wxGetResource(const wxString& section, const wxString& entry, long *value, const wxString& file)
 376 {
 377     char *s = NULL;
 378     bool succ = wxGetResource(section, entry, (char **)&s, file);
 379     if (succ)
 380     {
 381         *value = strtol(s, NULL, 10);
 382         delete[] s;
 383         return true;
 384     }
 385     else return FALSE;
 386 }
 387
 388 bool wxGetResource(const wxString& section, const wxString& entry, int *value, const wxString& file)
 389 {
 390     char *s = NULL;
 391     bool succ = wxGetResource(section, entry, (char **)&s, file);
 392     if (succ)
 393     {
 394         // Handle True, False here
 395         // True, Yes, Enables, Set or  Activated
 396         if (*s == 'T' || *s == 'Y' || *s == 'E' || *s == 'S' || *s == 'A')
 397             *value = TRUE;
 398         // False, No, Disabled, Reset, Cleared, Deactivated
 399         else if (*s == 'F' || *s == 'N' || *s == 'D' || *s == 'R' || *s == 'C')
 400             *value = FALSE;
 401         // Handle as Integer
 402         else
 403             *value = (int) strtol (s, NULL, 10);
 404         delete[] s;
 405         return true;
 406     }
 407     else
 408         return FALSE;
 409 }
 410
 411 void wxXMergeDatabases (wxApp * theApp, Display * display)
 412 {
 413     XrmDatabase homeDB, serverDB, applicationDB;
 414     char filenamebuf[1024];
 415
 416     char *filename = &filenamebuf[0];
 417     char *environment;
 418     wxString classname = theApp->GetClassName();
 419     char name[256];
 420     (void) strcpy (name, "/usr/lib/X11/app-defaults/");
 421     (void) strcat (name, classname.c_str());
 422
 423     /* Get application defaults file, if any */
 424     applicationDB = XrmGetFileDatabase (name);
 425     (void) XrmMergeDatabases (applicationDB, &wxResourceDatabase);
 426
 427     /* Merge server defaults, created by xrdb, loaded as a property of the root
 428     * window when the server initializes and loaded into the display
 429     * structure on XOpenDisplay;
 430     * if not defined, use .Xdefaults
 431     */
 432
 433     if (XResourceManagerString (display) != NULL)
 434     {
 435         serverDB = XrmGetStringDatabase (XResourceManagerString (display));
 436     }
 437     else
 438     {
 439         (void) GetIniFile (filename, NULL);
 440         serverDB = XrmGetFileDatabase (filename);
 441     }
 442     XrmMergeDatabases (serverDB, &wxResourceDatabase);
 443
 444     /* Open XENVIRONMENT file, or if not defined, the .Xdefaults,
 445     * and merge into existing database
 446     */
 447
 448     if ((environment = getenv ("XENVIRONMENT")) == NULL)
 449     {
 450         size_t len;
 451         environment = GetIniFile (filename, NULL);
 452         len = strlen (environment);
 453         wxString hostname = wxGetHostName();
 454         if ( !!hostname )
 455             strncat(environment, hostname, 1024 - len);
 456     }
 457     homeDB = XrmGetFileDatabase (environment);
 458     XrmMergeDatabases (homeDB, &wxResourceDatabase);
 459 }
 460
 461 #if 0
 462
 463 /*
 464 * Not yet used but may be useful.
 465 *
 466 */
 467 void
 468 wxSetDefaultResources (const Widget w, const char **resourceSpec, const char *name)
 469 {
 470     int i;
 471     Display *dpy = XtDisplay (w);    // Retrieve the display pointer
 472
 473     XrmDatabase rdb = NULL;    // A resource data base
 474
 475     // Create an empty resource database
 476     rdb = XrmGetStringDatabase ("");
 477
 478     // Add the Component resources, prepending the name of the component
 479
 480     i = 0;
 481     while (resourceSpec[i] != NULL)
 482     {
 483         char buf[1000];
 484
 485         sprintf (buf, "*%s%s", name, resourceSpec[i++]);
 486         XrmPutLineResource (&rdb, buf);
 487     }
 488
 489     // Merge them into the Xt database, with lowest precendence
 490
 491     if (rdb)
 492     {
 493 #if (XlibSpecificationRelease>=5)
 494         XrmDatabase db = XtDatabase (dpy);
 495         XrmCombineDatabase (rdb, &db, FALSE);
 496 #else
 497         XrmMergeDatabases (dpy->db, &rdb);
 498         dpy->db = rdb;
 499 #endif
 500     }
 501 }
 502 #endif
 503 // 0
 504
 505 #endif // wxUSE_RESOURCES
 506
 507 // ----------------------------------------------------------------------------
 508 // display info
 509 // ----------------------------------------------------------------------------
 510
 511 void wxGetMousePosition( int* x, int* y )
 512 {
 513 #if wxUSE_NANOX
 514     // TODO
 515     *x = 0;
 516     *y = 0;
 517 #else
 518     XMotionEvent xev;
 519     Window root, child;
 520     XQueryPointer(wxGlobalDisplay(),
 521                   DefaultRootWindow(wxGlobalDisplay()),
 522                   &root, &child,
 523                   &(xev.x_root), &(xev.y_root),
 524                   &(xev.x),      &(xev.y),
 525                   &(xev.state));
 526     *x = xev.x_root;
 527     *y = xev.y_root;
 528 #endif
 529 };
 530
 531 // Return true if we have a colour display
 532 bool wxColourDisplay()
 533 {
 534     return wxDisplayDepth() > 1;
 535 }
 536
 537 // Returns depth of screen
 538 int wxDisplayDepth()
 539 {
 540     Display *dpy = wxGlobalDisplay();
 541
 542     return DefaultDepth (dpy, DefaultScreen (dpy));
 543 }
 544
 545 // Get size of display
 546 void wxDisplaySize(int *width, int *height)
 547 {
 548     Display *dpy = wxGlobalDisplay();
 549
 550     if ( width )
 551         *width = DisplayWidth (dpy, DefaultScreen (dpy));
 552     if ( height )
 553         *height = DisplayHeight (dpy, DefaultScreen (dpy));
 554 }
 555
 556 void wxDisplaySizeMM(int *width, int *height)
 557 {
 558     Display *dpy = wxGlobalDisplay();
 559
 560     if ( width )
 561         *width = DisplayWidthMM(dpy, DefaultScreen (dpy));
 562     if ( height )
 563         *height = DisplayHeightMM(dpy, DefaultScreen (dpy));
 564 }
 565
 566 void wxClientDisplayRect(int *x, int *y, int *width, int *height)
 567 {
 568     // This is supposed to return desktop dimensions minus any window
 569     // manager panels, menus, taskbars, etc.  If there is a way to do that
 570     // for this platform please fix this function, otherwise it defaults
 571     // to the entire desktop.
 572     if (x) *x = 0;
 573     if (y) *y = 0;
 574     wxDisplaySize(width, height);
 575 }
 576
 577
 578 // Configurable display in wxX11 and wxMotif
 579 static WXDisplay *gs_currentDisplay = NULL;
 580 static wxString gs_displayName;
 581
 582 WXDisplay *wxGetDisplay()
 583 {
 584     if (gs_currentDisplay)
 585         return gs_currentDisplay;
 586     else if (wxTheApp)
 587         return wxTheApp->GetInitialDisplay();
 588     return NULL;
 589 }
 590
 591 bool wxSetDisplay(const wxString& display_name)
 592 {
 593     gs_displayName = display_name;
 594
 595     if ( display_name.empty() )
 596     {
 597         gs_currentDisplay = NULL;
 598
 599         return true;
 600     }
 601     else
 602     {
 603         Cardinal argc = 0;
 604
 605         Display *display = XtOpenDisplay((XtAppContext) wxTheApp->GetAppContext(),
 606             display_name.c_str(),
 607             wxTheApp->GetAppName().c_str(),
 608             wxTheApp->GetClassName().c_str(),
 609             NULL,
 610 #if XtSpecificationRelease < 5
 611             0, &argc,
 612 #else
 613             0, (int *)&argc,
 614 #endif
 615             NULL);
 616
 617         if (display)
 618         {
 619             gs_currentDisplay = (WXDisplay*) display;
 620             return true;
 621         }
 622         else
 623             return FALSE;
 624     }
 625 }
 626
 627 wxString wxGetDisplayName()
 628 {
 629     return gs_displayName;
 630 }
 631
 632 wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 633 {
 634     return wxGenericFindWindowAtPoint(pt);
 635 }
 636
 637 // ----------------------------------------------------------------------------
 638 // Some colour manipulation routines
 639 // ----------------------------------------------------------------------------
 640
 641 void wxHSVToXColor(wxHSV *hsv,XColor *rgb)
 642 {
 643     int h = hsv->h;
 644     int s = hsv->s;
 645     int v = hsv->v;
 646     int r = 0, g = 0, b = 0;
 647     int i, f;
 648     int p, q, t;
 649     s = (s * wxMAX_RGB) / wxMAX_SV;
 650     v = (v * wxMAX_RGB) / wxMAX_SV;
 651     if (h == 360) h = 0;
 652     if (s == 0) { h = 0; r = g = b = v; }
 653     i = h / 60;
 654     f = h % 60;
 655     p = v * (wxMAX_RGB - s) / wxMAX_RGB;
 656     q = v * (wxMAX_RGB - s * f / 60) / wxMAX_RGB;
 657     t = v * (wxMAX_RGB - s * (60 - f) / 60) / wxMAX_RGB;
 658     switch (i)
 659     {
 660     case 0: r = v, g = t, b = p; break;
 661     case 1: r = q, g = v, b = p; break;
 662     case 2: r = p, g = v, b = t; break;
 663     case 3: r = p, g = q, b = v; break;
 664     case 4: r = t, g = p, b = v; break;
 665     case 5: r = v, g = p, b = q; break;
 666     }
 667     rgb->red = r << 8;
 668     rgb->green = g << 8;
 669     rgb->blue = b << 8;
 670 }
 671
 672 void wxXColorToHSV(wxHSV *hsv,XColor *rgb)
 673 {
 674     int r = rgb->red >> 8;
 675     int g = rgb->green >> 8;
 676     int b = rgb->blue >> 8;
 677     int maxv = wxMax3(r, g, b);
 678     int minv = wxMin3(r, g, b);
 679     int h = 0, s, v;
 680     v = maxv;
 681     if (maxv) s = (maxv - minv) * wxMAX_RGB / maxv;
 682     else s = 0;
 683     if (s == 0) h = 0;
 684     else
 685     {
 686         int rc, gc, bc, hex = 0;
 687         rc = (maxv - r) * wxMAX_RGB / (maxv - minv);
 688         gc = (maxv - g) * wxMAX_RGB / (maxv - minv);
 689         bc = (maxv - b) * wxMAX_RGB / (maxv - minv);
 690         if (r == maxv) { h = bc - gc, hex = 0; }
 691         else if (g == maxv) { h = rc - bc, hex = 2; }
 692         else if (b == maxv) { h = gc - rc, hex = 4; }
 693         h = hex * 60 + (h * 60 / wxMAX_RGB);
 694         if (h < 0) h += 360;
 695     }
 696     hsv->h = h;
 697     hsv->s = (s * wxMAX_SV) / wxMAX_RGB;
 698     hsv->v = (v * wxMAX_SV) / wxMAX_RGB;
 699 }
 700
 701 void wxAllocNearestColor(Display *d,Colormap cmp,XColor *xc)
 702 {
 703 #if !wxUSE_NANOX
 704     int llp;
 705
 706     int screen = DefaultScreen(d);
 707     int num_colors = DisplayCells(d,screen);
 708
 709     XColor *color_defs = new XColor[num_colors];
 710     for(llp = 0;llp < num_colors;llp++) color_defs[llp].pixel = llp;
 711     XQueryColors(d,cmp,color_defs,num_colors);
 712
 713     wxHSV hsv_defs, hsv;
 714     wxXColorToHSV(&hsv,xc);
 715
 716     int diff, min_diff = 0, pixel = 0;
 717
 718     for(llp = 0;llp < num_colors;llp++)
 719     {
 720         wxXColorToHSV(&hsv_defs,&color_defs[llp]);
 721         diff = wxSIGN(wxH_WEIGHT * (hsv.h - hsv_defs.h)) +
 722             wxSIGN(wxS_WEIGHT * (hsv.s - hsv_defs.s)) +
 723             wxSIGN(wxV_WEIGHT * (hsv.v - hsv_defs.v));
 724         if (llp == 0) min_diff = diff;
 725         if (min_diff > diff) { min_diff = diff; pixel = llp; }
 726         if (min_diff == 0) break;
 727     }
 728
 729     xc -> red = color_defs[pixel].red;
 730     xc -> green = color_defs[pixel].green;
 731     xc -> blue = color_defs[pixel].blue;
 732     xc -> flags = DoRed | DoGreen | DoBlue;
 733
 734 /*  FIXME, TODO
 735     if (!XAllocColor(d,cmp,xc))
 736         cout << "wxAllocNearestColor : Warning : Cannot find nearest color !\n";
 737 */
 738
 739     delete[] color_defs;
 740 #endif
 741 }
 742
 743 void wxAllocColor(Display *d,Colormap cmp,XColor *xc)
 744 {
 745     if (!XAllocColor(d,cmp,xc))
 746     {
 747         //          cout << "wxAllocColor : Warning : Can not allocate color, attempt find nearest !\n";
 748         wxAllocNearestColor(d,cmp,xc);
 749     }
 750 }
 751
 752 #ifdef __WXDEBUG__
 753 wxString wxGetXEventName(XEvent& event)
 754 {
 755 #if wxUSE_NANOX
 756     wxString str(wxT("(some event)"));
 757     return str;
 758 #else
 759     int type = event.xany.type;
 760     static char* event_name[] = {
 761         "", "unknown(-)",                                         // 0-1
 762         "KeyPress", "KeyRelease", "ButtonPress", "ButtonRelease", // 2-5
 763         "MotionNotify", "EnterNotify", "LeaveNotify", "FocusIn",  // 6-9
 764         "FocusOut", "KeymapNotify", "Expose", "GraphicsExpose",   // 10-13
 765         "NoExpose", "VisibilityNotify", "CreateNotify",           // 14-16
 766         "DestroyNotify", "UnmapNotify", "MapNotify", "MapRequest",// 17-20
 767         "ReparentNotify", "ConfigureNotify", "ConfigureRequest",  // 21-23
 768         "GravityNotify", "ResizeRequest", "CirculateNotify",      // 24-26
 769         "CirculateRequest", "PropertyNotify", "SelectionClear",   // 27-29
 770         "SelectionRequest", "SelectionNotify", "ColormapNotify",  // 30-32
 771         "ClientMessage", "MappingNotify",                         // 33-34
 772         "unknown(+)"};                                            // 35
 773     type = wxMin(35, type); type = wxMax(1, type);
 774     wxString str(event_name[type]);
 775     return str;
 776 #endif
 777 }
 778 #endif
 779
 780 // ----------------------------------------------------------------------------
 781 // accelerators
 782 // ----------------------------------------------------------------------------
 783
 784 // Find the letter corresponding to the mnemonic, for Motif
 785 char wxFindMnemonic (const char *s)
 786 {
 787     char mnem = 0;
 788     int len = strlen (s);
 789     int i;
 790
 791     for (i = 0; i < len; i++)
 792     {
 793         if (s[i] == '&')
 794         {
 795             // Carefully handle &&
 796             if ((i + 1) <= len && s[i + 1] == '&')
 797                 i++;
 798             else
 799             {
 800                 mnem = s[i + 1];
 801                 break;
 802             }
 803         }
 804     }
 805     return mnem;
 806 }
 807
 808 char* wxFindAccelerator( const char *s )
 809 {
 810 #if 1
 811     // VZ: this function returns incorrect keysym which completely breaks kbd
 812     //     handling
 813     return NULL;
 814 #else
 815     // The accelerator text is after the \t char.
 816     s = strchr( s, '\t' );
 817
 818     if( !s ) return NULL;
 819
 820     /*
 821     Now we need to format it as X standard:
 822
 823       input            output
 824
 825         F7           --> <Key>F7
 826         Ctrl+N       --> Ctrl<Key>N
 827         Alt+k        --> Meta<Key>k
 828         Ctrl+Shift+A --> Ctrl Shift<Key>A
 829
 830         and handle Ctrl-N & similia
 831     */
 832
 833     static char buf[256];
 834
 835     buf[0] = '\0';
 836     wxString tmp = s + 1; // skip TAB
 837     size_t index = 0;
 838
 839     while( index < tmp.length() )
 840     {
 841         size_t plus  = tmp.find( '+', index );
 842         size_t minus = tmp.find( '-', index );
 843
 844         // neither '+' nor '-', add <Key>
 845         if( plus == wxString::npos && minus == wxString::npos )
 846         {
 847             strcat( buf, "<Key>" );
 848             strcat( buf, tmp.c_str() + index );
 849
 850             return buf;
 851         }
 852
 853         // OK: npos is big and positive
 854         size_t sep = wxMin( plus, minus );
 855         wxString mod = tmp.substr( index, sep - index );
 856
 857         // Ctrl  -> Ctrl
 858         // Shift -> Shift
 859         // Alt   -> Meta
 860         if( mod == "Alt" )
 861             mod = "Meta";
 862
 863         if( buf[0] )
 864             strcat( buf, " " );
 865
 866         strcat( buf, mod.c_str() );
 867
 868         index = sep + 1;
 869     }
 870
 871     return NULL;
 872 #endif
 873 }
 874
 875 XmString wxFindAcceleratorText (const char *s)
 876 {
 877 #if 1
 878     // VZ: this function returns incorrect keysym which completely breaks kbd
 879     //     handling
 880     return NULL;
 881 #else
 882     // The accelerator text is after the \t char.
 883     s = strchr( s, '\t' );
 884
 885     if( !s ) return NULL;
 886
 887     return wxStringToXmString( s + 1 ); // skip TAB!
 888 #endif
 889 }
 890
 891 // Change a widget's foreground and background colours.
 892 void wxDoChangeForegroundColour(WXWidget widget, wxColour& foregroundColour)
 893 {
 894     // When should we specify the foreground, if it's calculated
 895     // by wxComputeColours?
 896     // Solution: say we start with the default (computed) foreground colour.
 897     // If we call SetForegroundColour explicitly for a control or window,
 898     // then the foreground is changed.
 899     // Therefore SetBackgroundColour computes the foreground colour, and
 900     // SetForegroundColour changes the foreground colour. The ordering is
 901     // important.
 902
 903     XtVaSetValues ((Widget) widget,
 904         XmNforeground, foregroundColour.AllocColour(XtDisplay((Widget) widget)),
 905         NULL);
 906 }
 907
 908 void wxDoChangeBackgroundColour(WXWidget widget, wxColour& backgroundColour, bool changeArmColour)
 909 {
 910     wxComputeColours (XtDisplay((Widget) widget), & backgroundColour,
 911         (wxColour*) NULL);
 912
 913     XtVaSetValues ((Widget) widget,
 914         XmNbackground, g_itemColors[wxBACK_INDEX].pixel,
 915         XmNtopShadowColor, g_itemColors[wxTOPS_INDEX].pixel,
 916         XmNbottomShadowColor, g_itemColors[wxBOTS_INDEX].pixel,
 917         XmNforeground, g_itemColors[wxFORE_INDEX].pixel,
 918         NULL);
 919
 920     if (changeArmColour)
 921         XtVaSetValues ((Widget) widget,
 922         XmNarmColor, g_itemColors[wxSELE_INDEX].pixel,
 923         NULL);
 924 }
 925
 926 extern void wxDoChangeFont(WXWidget widget, wxFont& font)
 927 {
 928     // Lesstif 0.87 hangs here, but 0.93 does not
 929 #if !wxCHECK_LESSTIF() || wxCHECK_LESSTIF_VERSION( 0, 93 )
 930     Widget w = (Widget)widget;
 931     XtVaSetValues( w,
 932                    wxFont::GetFontTag(), font.GetFontType( XtDisplay(w) ),
 933                    NULL );
 934 #endif
 935
 936 }
 937
 938 wxString wxXmStringToString( const XmString& xmString )
 939 {
 940     char *txt;
 941     if( XmStringGetLtoR( xmString, XmSTRING_DEFAULT_CHARSET, &txt ) )
 942     {
 943         wxString str(txt);
 944         XtFree (txt);
 945         return str;
 946     }
 947
 948     return wxEmptyString;
 949 }
 950
 951 XmString wxStringToXmString( const wxString& str )
 952 {
 953     return XmStringCreateLtoR((char *)str.c_str(), XmSTRING_DEFAULT_CHARSET);
 954 }
 955
 956 XmString wxStringToXmString( const char* str )
 957 {
 958     return XmStringCreateLtoR((char *)str, XmSTRING_DEFAULT_CHARSET);
 959 }
 960
 961 // ----------------------------------------------------------------------------
 962 // wxBitmap utility functions
 963 // ----------------------------------------------------------------------------
 964
 965 // Creates a bitmap with transparent areas drawn in
 966 // the given colour.
 967 wxBitmap wxCreateMaskedBitmap(const wxBitmap& bitmap, wxColour& colour)
 968 {
 969     wxBitmap newBitmap(bitmap.GetWidth(),
 970                        bitmap.GetHeight(),
 971                        bitmap.GetDepth());
 972     wxMemoryDC destDC;
 973     wxMemoryDC srcDC;
 974
 975     srcDC.SelectObject(bitmap);
 976     destDC.SelectObject(newBitmap);
 977
 978     wxBrush brush(colour, wxSOLID);
 979     destDC.SetBackground(brush);
 980     destDC.Clear();
 981     destDC.Blit(0, 0, bitmap.GetWidth(), bitmap.GetHeight(),
 982                 &srcDC, 0, 0, wxCOPY, true);
 983
 984     return newBitmap;
 985 }
 986
 987 // ----------------------------------------------------------------------------
 988 // Miscellaneous functions
 989 // ----------------------------------------------------------------------------
 990
 991 WXWidget wxCreateBorderWidget( WXWidget parent, long style )
 992 {
 993     Widget borderWidget = (Widget)NULL, parentWidget = (Widget)parent;
 994
 995     if (style & wxSIMPLE_BORDER)
 996     {
 997         borderWidget = XtVaCreateManagedWidget
 998                                    (
 999                                     "simpleBorder",
1000                                     xmFrameWidgetClass, parentWidget,
1001                                     XmNshadowType, XmSHADOW_ETCHED_IN,
1002                                     XmNshadowThickness, 1,
1003                                     NULL
1004                                    );
1005     }
1006     else if (style & wxSUNKEN_BORDER)
1007     {
1008         borderWidget = XtVaCreateManagedWidget
1009                                    (
1010                                     "sunkenBorder",
1011                                     xmFrameWidgetClass, parentWidget,
1012                                     XmNshadowType, XmSHADOW_IN,
1013                                     NULL
1014                                    );
1015     }
1016     else if (style & wxRAISED_BORDER)
1017     {
1018         borderWidget = XtVaCreateManagedWidget
1019                                    (
1020                                     "raisedBorder",
1021                                     xmFrameWidgetClass, parentWidget,
1022                                     XmNshadowType, XmSHADOW_OUT,
1023                                     NULL
1024                                    );
1025     }
1026
1027     return borderWidget;
1028 }