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     if (display)
 159     {
 160         info.versionMajor = ProtocolVersion (display);
 161         info.versionMinor = ProtocolRevision (display);
 162     }
 163     info.os = wxMOTIF_X;
 164     return info;
 165 }
 166
 167 // ----------------------------------------------------------------------------
 168 // Reading and writing resources (eg WIN.INI, .Xdefaults)
 169 // ----------------------------------------------------------------------------
 170
 171 #if wxUSE_RESOURCES
 172
 173 // Read $HOME for what it says is home, if not
 174 // read $USER or $LOGNAME for user name else determine
 175 // the Real User, then determine the Real home dir.
 176 static char * GetIniFile (char *dest, const char *filename)
 177 {
 178     char *home = NULL;
 179     if (filename && wxIsAbsolutePath(filename))
 180     {
 181         strcpy(dest, filename);
 182     }
 183     else if ((home = wxGetUserHome("")) != NULL)
 184     {
 185         strcpy(dest, home);
 186         if (dest[strlen(dest) - 1] != '/')
 187             strcat (dest, "/");
 188         if (filename == NULL)
 189         {
 190             if ((filename = getenv ("XENVIRONMENT")) == NULL)
 191                 filename = ".Xdefaults";
 192         }
 193         else if (*filename != '.')
 194             strcat (dest, ".");
 195         strcat (dest, filename);
 196     } else
 197     {
 198         dest[0] = '\0';
 199     }
 200     return dest;
 201 }
 202
 203 static char *GetResourcePath(char *buf, const char *name, bool create = false)
 204 {
 205     if (create && wxFileExists (name) ) {
 206         strcpy(buf, name);
 207         return buf; // Exists so ...
 208     }
 209
 210     if (*name == '/')
 211         strcpy(buf, name);
 212     else {
 213         // Put in standard place for resource files if not absolute
 214         strcpy (buf, DEFAULT_XRESOURCE_DIR);
 215         strcat (buf, "/");
 216         strcat (buf, wxFileNameFromPath (name).c_str());
 217     }
 218
 219     if (create) {
 220         // Touch the file to create it
 221         FILE *fd = fopen (buf, "w");
 222         if (fd) fclose (fd);
 223     }
 224     return buf;
 225 }
 226
 227 /*
 228 * We have a cache for writing different resource files,
 229 * which will only get flushed when we call wxFlushResources().
 230 * Build up a list of resource databases waiting to be written.
 231 *
 232 */
 233
 234 wxList wxResourceCache (wxKEY_STRING);
 235
 236 void
 237 wxFlushResources (void)
 238 {
 239     char nameBuffer[512];
 240
 241     wxNode *node = wxResourceCache.First ();
 242     while (node)
 243     {
 244         const char *file = node->GetKeyString();
 245         // If file doesn't exist, create it first.
 246         (void)GetResourcePath(nameBuffer, file, true);
 247
 248         XrmDatabase database = (XrmDatabase) node->Data ();
 249         XrmPutFileDatabase (database, nameBuffer);
 250         XrmDestroyDatabase (database);
 251         wxNode *next = node->Next ();
 252         delete node;
 253         node = next;
 254     }
 255 }
 256
 257 static XrmDatabase wxResourceDatabase = 0;
 258
 259 void wxXMergeDatabases (wxApp * theApp, Display * display);
 260
 261 bool wxWriteResource(const wxString& section, const wxString& entry, const wxString& value, const wxString& file)
 262 {
 263     char buffer[500];
 264
 265     (void) GetIniFile (buffer, file);
 266
 267     XrmDatabase database;
 268     wxNode *node = wxResourceCache.Find (buffer);
 269     if (node)
 270         database = (XrmDatabase) node->Data ();
 271     else
 272     {
 273         database = XrmGetFileDatabase (buffer);
 274         wxResourceCache.Append (buffer, (wxObject *) database);
 275     }
 276
 277     char resName[300];
 278     strcpy (resName, section.c_str());
 279     strcat (resName, ".");
 280     strcat (resName, entry.c_str());
 281
 282     XrmPutStringResource (&database, resName, value);
 283     return true;
 284 }
 285
 286 bool wxWriteResource(const wxString& section, const wxString& entry, float value, const wxString& file)
 287 {
 288     char buf[50];
 289     sprintf(buf, "%.4f", value);
 290     return wxWriteResource(section, entry, buf, file);
 291 }
 292
 293 bool wxWriteResource(const wxString& section, const wxString& entry, long value, const wxString& file)
 294 {
 295     char buf[50];
 296     sprintf(buf, "%ld", value);
 297     return wxWriteResource(section, entry, buf, file);
 298 }
 299
 300 bool wxWriteResource(const wxString& section, const wxString& entry, int value, const wxString& file)
 301 {
 302     char buf[50];
 303     sprintf(buf, "%d", value);
 304     return wxWriteResource(section, entry, buf, file);
 305 }
 306
 307 bool wxGetResource(const wxString& section, const wxString& entry, char **value, const wxString& file)
 308 {
 309     if (!wxResourceDatabase)
 310     {
 311         Display *display = wxGlobalDisplay();
 312         wxXMergeDatabases (wxTheApp, display);
 313     }
 314
 315     XrmDatabase database;
 316
 317     if (file != "")
 318     {
 319         char buffer[500];
 320
 321         // Is this right? Trying to get it to look in the user's
 322         // home directory instead of current directory -- JACS
 323         (void) GetIniFile (buffer, file);
 324
 325         wxNode *node = wxResourceCache.Find (buffer);
 326         if (node)
 327             database = (XrmDatabase) node->Data ();
 328         else
 329         {
 330             database = XrmGetFileDatabase (buffer);
 331             wxResourceCache.Append (buffer, (wxObject *) database);
 332         }
 333     }
 334     else
 335         database = wxResourceDatabase;
 336
 337     XrmValue xvalue;
 338     char *str_type[20];
 339     char buf[150];
 340     strcpy (buf, section);
 341     strcat (buf, ".");
 342     strcat (buf, entry);
 343
 344     Bool success = XrmGetResource (database, buf, "*", str_type,
 345         &xvalue);
 346     // Try different combinations of upper/lower case, just in case...
 347     if (!success)
 348     {
 349         buf[0] = (isupper (buf[0]) ? tolower (buf[0]) : toupper (buf[0]));
 350         success = XrmGetResource (database, buf, "*", str_type,
 351             &xvalue);
 352     }
 353     if (success)
 354     {
 355         if (*value)
 356             delete[] *value;
 357
 358         *value = new char[xvalue.size + 1];
 359         strncpy (*value, xvalue.addr, (int) xvalue.size);
 360         return true;
 361     }
 362     return false;
 363 }
 364
 365 bool wxGetResource(const wxString& section, const wxString& entry, float *value, const wxString& file)
 366 {
 367     char *s = NULL;
 368     bool succ = wxGetResource(section, entry, (char **)&s, file);
 369     if (succ)
 370     {
 371         *value = (float)strtod(s, NULL);
 372         delete[] s;
 373         return true;
 374     }
 375     else return false;
 376 }
 377
 378 bool wxGetResource(const wxString& section, const wxString& entry, long *value, const wxString& file)
 379 {
 380     char *s = NULL;
 381     bool succ = wxGetResource(section, entry, (char **)&s, file);
 382     if (succ)
 383     {
 384         *value = strtol(s, NULL, 10);
 385         delete[] s;
 386         return true;
 387     }
 388     else return false;
 389 }
 390
 391 bool wxGetResource(const wxString& section, const wxString& entry, int *value, const wxString& file)
 392 {
 393     char *s = NULL;
 394     bool succ = wxGetResource(section, entry, (char **)&s, file);
 395     if (succ)
 396     {
 397         // Handle True, False here
 398         // True, Yes, Enables, Set or  Activated
 399         if (*s == 'T' || *s == 'Y' || *s == 'E' || *s == 'S' || *s == 'A')
 400             *value = true;
 401         // False, No, Disabled, Reset, Cleared, Deactivated
 402         else if (*s == 'F' || *s == 'N' || *s == 'D' || *s == 'R' || *s == 'C')
 403             *value = false;
 404         // Handle as Integer
 405         else
 406             *value = (int) strtol (s, NULL, 10);
 407         delete[] s;
 408         return true;
 409     }
 410     else
 411         return false;
 412 }
 413
 414 void wxXMergeDatabases (wxApp * theApp, Display * display)
 415 {
 416     XrmDatabase homeDB, serverDB, applicationDB;
 417     char filenamebuf[1024];
 418
 419     char *filename = &filenamebuf[0];
 420     char *environment;
 421     wxString classname = theApp->GetClassName();
 422     char name[256];
 423     (void) strcpy (name, "/usr/lib/X11/app-defaults/");
 424     (void) strcat (name, classname.c_str());
 425
 426     /* Get application defaults file, if any */
 427     applicationDB = XrmGetFileDatabase (name);
 428     (void) XrmMergeDatabases (applicationDB, &wxResourceDatabase);
 429
 430     /* Merge server defaults, created by xrdb, loaded as a property of the root
 431     * window when the server initializes and loaded into the display
 432     * structure on XOpenDisplay;
 433     * if not defined, use .Xdefaults
 434     */
 435
 436     if (XResourceManagerString (display) != NULL)
 437     {
 438         serverDB = XrmGetStringDatabase (XResourceManagerString (display));
 439     }
 440     else
 441     {
 442         (void) GetIniFile (filename, NULL);
 443         serverDB = XrmGetFileDatabase (filename);
 444     }
 445     XrmMergeDatabases (serverDB, &wxResourceDatabase);
 446
 447     /* Open XENVIRONMENT file, or if not defined, the .Xdefaults,
 448     * and merge into existing database
 449     */
 450
 451     if ((environment = getenv ("XENVIRONMENT")) == NULL)
 452     {
 453         size_t len;
 454         environment = GetIniFile (filename, NULL);
 455         len = strlen (environment);
 456         wxString hostname = wxGetHostName();
 457         if ( !!hostname )
 458             strncat(environment, hostname, 1024 - len);
 459     }
 460     homeDB = XrmGetFileDatabase (environment);
 461     XrmMergeDatabases (homeDB, &wxResourceDatabase);
 462 }
 463
 464 #if 0
 465
 466 /*
 467 * Not yet used but may be useful.
 468 *
 469 */
 470 void
 471 wxSetDefaultResources (const Widget w, const char **resourceSpec, const char *name)
 472 {
 473     int i;
 474     Display *dpy = XtDisplay (w);    // Retrieve the display pointer
 475
 476     XrmDatabase rdb = NULL;    // A resource data base
 477
 478     // Create an empty resource database
 479     rdb = XrmGetStringDatabase ("");
 480
 481     // Add the Component resources, prepending the name of the component
 482
 483     i = 0;
 484     while (resourceSpec[i] != NULL)
 485     {
 486         char buf[1000];
 487
 488         sprintf (buf, "*%s%s", name, resourceSpec[i++]);
 489         XrmPutLineResource (&rdb, buf);
 490     }
 491
 492     // Merge them into the Xt database, with lowest precendence
 493
 494     if (rdb)
 495     {
 496 #if (XlibSpecificationRelease>=5)
 497         XrmDatabase db = XtDatabase (dpy);
 498         XrmCombineDatabase (rdb, &db, False);
 499 #else
 500         XrmMergeDatabases (dpy->db, &rdb);
 501         dpy->db = rdb;
 502 #endif
 503     }
 504 }
 505 #endif
 506 // 0
 507
 508 #endif // wxUSE_RESOURCES
 509
 510 // ----------------------------------------------------------------------------
 511 // display info
 512 // ----------------------------------------------------------------------------
 513
 514 void wxGetMousePosition( int* x, int* y )
 515 {
 516 #if wxUSE_NANOX
 517     // TODO
 518     *x = 0;
 519     *y = 0;
 520 #else
 521     XMotionEvent xev;
 522     Window root, child;
 523     XQueryPointer(wxGlobalDisplay(),
 524                   DefaultRootWindow(wxGlobalDisplay()),
 525                   &root, &child,
 526                   &(xev.x_root), &(xev.y_root),
 527                   &(xev.x),      &(xev.y),
 528                   &(xev.state));
 529     *x = xev.x_root;
 530     *y = xev.y_root;
 531 #endif
 532 };
 533
 534 // Return true if we have a colour display
 535 bool wxColourDisplay()
 536 {
 537     return wxDisplayDepth() > 1;
 538 }
 539
 540 // Returns depth of screen
 541 int wxDisplayDepth()
 542 {
 543     Display *dpy = wxGlobalDisplay();
 544
 545     return DefaultDepth (dpy, DefaultScreen (dpy));
 546 }
 547
 548 // Get size of display
 549 void wxDisplaySize(int *width, int *height)
 550 {
 551     Display *dpy = wxGlobalDisplay();
 552
 553     if ( width )
 554         *width = DisplayWidth (dpy, DefaultScreen (dpy));
 555     if ( height )
 556         *height = DisplayHeight (dpy, DefaultScreen (dpy));
 557 }
 558
 559 void wxDisplaySizeMM(int *width, int *height)
 560 {
 561     Display *dpy = wxGlobalDisplay();
 562
 563     if ( width )
 564         *width = DisplayWidthMM(dpy, DefaultScreen (dpy));
 565     if ( height )
 566         *height = DisplayHeightMM(dpy, DefaultScreen (dpy));
 567 }
 568
 569 void wxClientDisplayRect(int *x, int *y, int *width, int *height)
 570 {
 571     // This is supposed to return desktop dimensions minus any window
 572     // manager panels, menus, taskbars, etc.  If there is a way to do that
 573     // for this platform please fix this function, otherwise it defaults
 574     // to the entire desktop.
 575     if (x) *x = 0;
 576     if (y) *y = 0;
 577     wxDisplaySize(width, height);
 578 }
 579
 580
 581 // Configurable display in wxX11 and wxMotif
 582 static WXDisplay *gs_currentDisplay = NULL;
 583 static wxString gs_displayName;
 584
 585 WXDisplay *wxGetDisplay()
 586 {
 587     if (gs_currentDisplay)
 588         return gs_currentDisplay;
 589     else if (wxTheApp)
 590         return wxTheApp->GetInitialDisplay();
 591     return NULL;
 592 }
 593
 594 bool wxSetDisplay(const wxString& display_name)
 595 {
 596     gs_displayName = display_name;
 597
 598     if ( display_name.empty() )
 599     {
 600         gs_currentDisplay = NULL;
 601
 602         return true;
 603     }
 604     else
 605     {
 606         Cardinal argc = 0;
 607
 608         Display *display = XtOpenDisplay((XtAppContext) wxTheApp->GetAppContext(),
 609             display_name.c_str(),
 610             wxTheApp->GetAppName().c_str(),
 611             wxTheApp->GetClassName().c_str(),
 612             NULL,
 613 #if XtSpecificationRelease < 5
 614             0, &argc,
 615 #else
 616             0, (int *)&argc,
 617 #endif
 618             NULL);
 619
 620         if (display)
 621         {
 622             gs_currentDisplay = (WXDisplay*) display;
 623             return true;
 624         }
 625         else
 626             return false;
 627     }
 628 }
 629
 630 wxString wxGetDisplayName()
 631 {
 632     return gs_displayName;
 633 }
 634
 635 wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 636 {
 637     return wxGenericFindWindowAtPoint(pt);
 638 }
 639
 640 // ----------------------------------------------------------------------------
 641 // Some colour manipulation routines
 642 // ----------------------------------------------------------------------------
 643
 644 void wxHSVToXColor(wxHSV *hsv,XColor *rgb)
 645 {
 646     int h = hsv->h;
 647     int s = hsv->s;
 648     int v = hsv->v;
 649     int r = 0, g = 0, b = 0;
 650     int i, f;
 651     int p, q, t;
 652     s = (s * wxMAX_RGB) / wxMAX_SV;
 653     v = (v * wxMAX_RGB) / wxMAX_SV;
 654     if (h == 360) h = 0;
 655     if (s == 0) { h = 0; r = g = b = v; }
 656     i = h / 60;
 657     f = h % 60;
 658     p = v * (wxMAX_RGB - s) / wxMAX_RGB;
 659     q = v * (wxMAX_RGB - s * f / 60) / wxMAX_RGB;
 660     t = v * (wxMAX_RGB - s * (60 - f) / 60) / wxMAX_RGB;
 661     switch (i)
 662     {
 663     case 0: r = v, g = t, b = p; break;
 664     case 1: r = q, g = v, b = p; break;
 665     case 2: r = p, g = v, b = t; break;
 666     case 3: r = p, g = q, b = v; break;
 667     case 4: r = t, g = p, b = v; break;
 668     case 5: r = v, g = p, b = q; break;
 669     }
 670     rgb->red = r << 8;
 671     rgb->green = g << 8;
 672     rgb->blue = b << 8;
 673 }
 674
 675 void wxXColorToHSV(wxHSV *hsv,XColor *rgb)
 676 {
 677     int r = rgb->red >> 8;
 678     int g = rgb->green >> 8;
 679     int b = rgb->blue >> 8;
 680     int maxv = wxMax3(r, g, b);
 681     int minv = wxMin3(r, g, b);
 682     int h = 0, s, v;
 683     v = maxv;
 684     if (maxv) s = (maxv - minv) * wxMAX_RGB / maxv;
 685     else s = 0;
 686     if (s == 0) h = 0;
 687     else
 688     {
 689         int rc, gc, bc, hex = 0;
 690         rc = (maxv - r) * wxMAX_RGB / (maxv - minv);
 691         gc = (maxv - g) * wxMAX_RGB / (maxv - minv);
 692         bc = (maxv - b) * wxMAX_RGB / (maxv - minv);
 693         if (r == maxv) { h = bc - gc, hex = 0; }
 694         else if (g == maxv) { h = rc - bc, hex = 2; }
 695         else if (b == maxv) { h = gc - rc, hex = 4; }
 696         h = hex * 60 + (h * 60 / wxMAX_RGB);
 697         if (h < 0) h += 360;
 698     }
 699     hsv->h = h;
 700     hsv->s = (s * wxMAX_SV) / wxMAX_RGB;
 701     hsv->v = (v * wxMAX_SV) / wxMAX_RGB;
 702 }
 703
 704 void wxAllocNearestColor(Display *d,Colormap cmp,XColor *xc)
 705 {
 706 #if !wxUSE_NANOX
 707     int llp;
 708
 709     int screen = DefaultScreen(d);
 710     int num_colors = DisplayCells(d,screen);
 711
 712     XColor *color_defs = new XColor[num_colors];
 713     for(llp = 0;llp < num_colors;llp++) color_defs[llp].pixel = llp;
 714     XQueryColors(d,cmp,color_defs,num_colors);
 715
 716     wxHSV hsv_defs, hsv;
 717     wxXColorToHSV(&hsv,xc);
 718
 719     int diff, min_diff = 0, pixel = 0;
 720
 721     for(llp = 0;llp < num_colors;llp++)
 722     {
 723         wxXColorToHSV(&hsv_defs,&color_defs[llp]);
 724         diff = wxSIGN(wxH_WEIGHT * (hsv.h - hsv_defs.h)) +
 725             wxSIGN(wxS_WEIGHT * (hsv.s - hsv_defs.s)) +
 726             wxSIGN(wxV_WEIGHT * (hsv.v - hsv_defs.v));
 727         if (llp == 0) min_diff = diff;
 728         if (min_diff > diff) { min_diff = diff; pixel = llp; }
 729         if (min_diff == 0) break;
 730     }
 731
 732     xc -> red = color_defs[pixel].red;
 733     xc -> green = color_defs[pixel].green;
 734     xc -> blue = color_defs[pixel].blue;
 735     xc -> flags = DoRed | DoGreen | DoBlue;
 736
 737 /*  FIXME, TODO
 738     if (!XAllocColor(d,cmp,xc))
 739         cout << "wxAllocNearestColor : Warning : Cannot find nearest color !\n";
 740 */
 741
 742     delete[] color_defs;
 743 #endif
 744 }
 745
 746 void wxAllocColor(Display *d,Colormap cmp,XColor *xc)
 747 {
 748     if (!XAllocColor(d,cmp,xc))
 749     {
 750         //          cout << "wxAllocColor : Warning : Can not allocate color, attempt find nearest !\n";
 751         wxAllocNearestColor(d,cmp,xc);
 752     }
 753 }
 754
 755 #ifdef __WXDEBUG__
 756 wxString wxGetXEventName(XEvent& event)
 757 {
 758 #if wxUSE_NANOX
 759     wxString str(wxT("(some event)"));
 760     return str;
 761 #else
 762     int type = event.xany.type;
 763     static char* event_name[] = {
 764         "", "unknown(-)",                                         // 0-1
 765         "KeyPress", "KeyRelease", "ButtonPress", "ButtonRelease", // 2-5
 766         "MotionNotify", "EnterNotify", "LeaveNotify", "FocusIn",  // 6-9
 767         "FocusOut", "KeymapNotify", "Expose", "GraphicsExpose",   // 10-13
 768         "NoExpose", "VisibilityNotify", "CreateNotify",           // 14-16
 769         "DestroyNotify", "UnmapNotify", "MapNotify", "MapRequest",// 17-20
 770         "ReparentNotify", "ConfigureNotify", "ConfigureRequest",  // 21-23
 771         "GravityNotify", "ResizeRequest", "CirculateNotify",      // 24-26
 772         "CirculateRequest", "PropertyNotify", "SelectionClear",   // 27-29
 773         "SelectionRequest", "SelectionNotify", "ColormapNotify",  // 30-32
 774         "ClientMessage", "MappingNotify",                         // 33-34
 775         "unknown(+)"};                                            // 35
 776     type = wxMin(35, type); type = wxMax(1, type);
 777     wxString str(event_name[type]);
 778     return str;
 779 #endif
 780 }
 781 #endif
 782
 783 // ----------------------------------------------------------------------------
 784 // accelerators
 785 // ----------------------------------------------------------------------------
 786
 787 // Find the letter corresponding to the mnemonic, for Motif
 788 char wxFindMnemonic (const char *s)
 789 {
 790     char mnem = 0;
 791     int len = strlen (s);
 792     int i;
 793
 794     for (i = 0; i < len; i++)
 795     {
 796         if (s[i] == '&')
 797         {
 798             // Carefully handle &&
 799             if ((i + 1) <= len && s[i + 1] == '&')
 800                 i++;
 801             else
 802             {
 803                 mnem = s[i + 1];
 804                 break;
 805             }
 806         }
 807     }
 808     return mnem;
 809 }
 810
 811 char* wxFindAccelerator( const char *s )
 812 {
 813 #if 1
 814     // VZ: this function returns incorrect keysym which completely breaks kbd
 815     //     handling
 816     return NULL;
 817 #else
 818     // The accelerator text is after the \t char.
 819     s = strchr( s, '\t' );
 820
 821     if( !s ) return NULL;
 822
 823     /*
 824     Now we need to format it as X standard:
 825
 826       input            output
 827
 828         F7           --> <Key>F7
 829         Ctrl+N       --> Ctrl<Key>N
 830         Alt+k        --> Meta<Key>k
 831         Ctrl+Shift+A --> Ctrl Shift<Key>A
 832
 833         and handle Ctrl-N & similia
 834     */
 835
 836     static char buf[256];
 837
 838     buf[0] = '\0';
 839     wxString tmp = s + 1; // skip TAB
 840     size_t index = 0;
 841
 842     while( index < tmp.length() )
 843     {
 844         size_t plus  = tmp.find( '+', index );
 845         size_t minus = tmp.find( '-', index );
 846
 847         // neither '+' nor '-', add <Key>
 848         if( plus == wxString::npos && minus == wxString::npos )
 849         {
 850             strcat( buf, "<Key>" );
 851             strcat( buf, tmp.c_str() + index );
 852
 853             return buf;
 854         }
 855
 856         // OK: npos is big and positive
 857         size_t sep = wxMin( plus, minus );
 858         wxString mod = tmp.substr( index, sep - index );
 859
 860         // Ctrl  -> Ctrl
 861         // Shift -> Shift
 862         // Alt   -> Meta
 863         if( mod == "Alt" )
 864             mod = "Meta";
 865
 866         if( buf[0] )
 867             strcat( buf, " " );
 868
 869         strcat( buf, mod.c_str() );
 870
 871         index = sep + 1;
 872     }
 873
 874     return NULL;
 875 #endif
 876 }
 877
 878 XmString wxFindAcceleratorText (const char *s)
 879 {
 880 #if 1
 881     // VZ: this function returns incorrect keysym which completely breaks kbd
 882     //     handling
 883     return NULL;
 884 #else
 885     // The accelerator text is after the \t char.
 886     s = strchr( s, '\t' );
 887
 888     if( !s ) return NULL;
 889
 890     return wxStringToXmString( s + 1 ); // skip TAB!
 891 #endif
 892 }
 893
 894 // Change a widget's foreground and background colours.
 895 void wxDoChangeForegroundColour(WXWidget widget, wxColour& foregroundColour)
 896 {
 897     // When should we specify the foreground, if it's calculated
 898     // by wxComputeColours?
 899     // Solution: say we start with the default (computed) foreground colour.
 900     // If we call SetForegroundColour explicitly for a control or window,
 901     // then the foreground is changed.
 902     // Therefore SetBackgroundColour computes the foreground colour, and
 903     // SetForegroundColour changes the foreground colour. The ordering is
 904     // important.
 905
 906     XtVaSetValues ((Widget) widget,
 907         XmNforeground, foregroundColour.AllocColour(XtDisplay((Widget) widget)),
 908         NULL);
 909 }
 910
 911 void wxDoChangeBackgroundColour(WXWidget widget, wxColour& backgroundColour, bool changeArmColour)
 912 {
 913     wxComputeColours (XtDisplay((Widget) widget), & backgroundColour,
 914         (wxColour*) NULL);
 915
 916     XtVaSetValues ((Widget) widget,
 917         XmNbackground, g_itemColors[wxBACK_INDEX].pixel,
 918         XmNtopShadowColor, g_itemColors[wxTOPS_INDEX].pixel,
 919         XmNbottomShadowColor, g_itemColors[wxBOTS_INDEX].pixel,
 920         XmNforeground, g_itemColors[wxFORE_INDEX].pixel,
 921         NULL);
 922
 923     if (changeArmColour)
 924         XtVaSetValues ((Widget) widget,
 925         XmNarmColor, g_itemColors[wxSELE_INDEX].pixel,
 926         NULL);
 927 }
 928
 929 extern void wxDoChangeFont(WXWidget widget, wxFont& font)
 930 {
 931     // Lesstif 0.87 hangs here, but 0.93 does not; MBN: sometimes it does
 932 #if !wxCHECK_LESSTIF() // || wxCHECK_LESSTIF_VERSION( 0, 93 )
 933     Widget w = (Widget)widget;
 934     XtVaSetValues( w,
 935                    wxFont::GetFontTag(), font.GetFontTypeC( XtDisplay(w) ),
 936                    NULL );
 937 #endif
 938
 939 }
 940
 941 wxString wxXmStringToString( const XmString& xmString )
 942 {
 943     char *txt;
 944     if( XmStringGetLtoR( xmString, XmSTRING_DEFAULT_CHARSET, &txt ) )
 945     {
 946         wxString str(txt);
 947         XtFree (txt);
 948         return str;
 949     }
 950
 951     return wxEmptyString;
 952 }
 953
 954 XmString wxStringToXmString( const wxString& str )
 955 {
 956     return XmStringCreateLtoR((char *)str.c_str(), XmSTRING_DEFAULT_CHARSET);
 957 }
 958
 959 XmString wxStringToXmString( const char* str )
 960 {
 961     return XmStringCreateLtoR((char *)str, XmSTRING_DEFAULT_CHARSET);
 962 }
 963
 964 // ----------------------------------------------------------------------------
 965 // wxBitmap utility functions
 966 // ----------------------------------------------------------------------------
 967
 968 // Creates a bitmap with transparent areas drawn in
 969 // the given colour.
 970 wxBitmap wxCreateMaskedBitmap(const wxBitmap& bitmap, wxColour& colour)
 971 {
 972     wxBitmap newBitmap(bitmap.GetWidth(),
 973                        bitmap.GetHeight(),
 974                        bitmap.GetDepth());
 975     wxMemoryDC destDC;
 976     wxMemoryDC srcDC;
 977
 978     srcDC.SelectObject(bitmap);
 979     destDC.SelectObject(newBitmap);
 980
 981     wxBrush brush(colour, wxSOLID);
 982     destDC.SetBackground(brush);
 983     destDC.Clear();
 984     destDC.Blit(0, 0, bitmap.GetWidth(), bitmap.GetHeight(),
 985                 &srcDC, 0, 0, wxCOPY, true);
 986
 987     return newBitmap;
 988 }
 989
 990 // ----------------------------------------------------------------------------
 991 // Miscellaneous functions
 992 // ----------------------------------------------------------------------------
 993
 994 WXWidget wxCreateBorderWidget( WXWidget parent, long style )
 995 {
 996     Widget borderWidget = (Widget)NULL, parentWidget = (Widget)parent;
 997
 998     if (style & wxSIMPLE_BORDER)
 999     {
1000         borderWidget = XtVaCreateManagedWidget
1001                                    (
1002                                     "simpleBorder",
1003                                     xmFrameWidgetClass, parentWidget,
1004                                     XmNshadowType, XmSHADOW_ETCHED_IN,
1005                                     XmNshadowThickness, 1,
1006                                     NULL
1007                                    );
1008     }
1009     else if (style & wxSUNKEN_BORDER)
1010     {
1011         borderWidget = XtVaCreateManagedWidget
1012                                    (
1013                                     "sunkenBorder",
1014                                     xmFrameWidgetClass, parentWidget,
1015                                     XmNshadowType, XmSHADOW_IN,
1016                                     NULL
1017                                    );
1018     }
1019     else if (style & wxRAISED_BORDER)
1020     {
1021         borderWidget = XtVaCreateManagedWidget
1022                                    (
1023                                     "raisedBorder",
1024                                     xmFrameWidgetClass, parentWidget,
1025                                     XmNshadowType, XmSHADOW_OUT,
1026                                     NULL
1027                                    );
1028     }
1029
1030     return borderWidget;
1031 }