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 #ifdef __GNUG__
  13 // Note: this is done in utilscmn.cpp now.
  14 // #pragma implementation
  15 // #pragma implementation "utils.h"
  16 #endif
  17
  18 #include "wx/setup.h"
  19 #include "wx/utils.h"
  20 #include "wx/app.h"
  21 #include "wx/msgdlg.h"
  22 #include "wx/cursor.h"
  23
  24 #include <ctype.h>
  25 #include <stdarg.h>
  26 #include <dirent.h>
  27 #include <string.h>
  28 #include <sys/stat.h>
  29 #include <sys/types.h>
  30 #include <unistd.h>
  31 #include <sys/wait.h>
  32 #include <pwd.h>
  33 #include <errno.h>
  34 #include <netdb.h>
  35 #include <signal.h>
  36
  37 #ifdef __SVR4__
  38 #include <sys/systeminfo.h>
  39 #endif
  40
  41 #include <Xm/Xm.h>
  42
  43 #include "wx/motif/private.h"
  44
  45 // Yuck this is really BOTH site and platform dependent
  46 // so we should use some other strategy!
  47 #ifdef sun
  48 # define DEFAULT_XRESOURCE_DIR "/usr/openwin/lib/app-defaults"
  49 #else
  50 # define DEFAULT_XRESOURCE_DIR "/usr/lib/X11/app-defaults"
  51 #endif
  52
  53 static char *GetIniFile (char *dest, const char *filename);
  54
  55 extern wxList wxTopLevelWindows;
  56
  57 // Get full hostname (eg. DoDo.BSn-Germany.crg.de)
  58 bool wxGetHostName(char *buf, int maxSize)
  59 {
  60 #if defined(SVR4) && !defined(__hpux)
  61   return (sysinfo (SI_HOSTNAME, buf, maxSize) != -1);
  62 #else /* BSD Sockets */
  63   char name[255];
  64   struct hostent *h;
  65
  66   // Get hostname
  67   if (gethostname (name, sizeof (name) / sizeof (char) - 1) == -1)
  68       return FALSE;
  69   // Get official full name of host
  70   strncpy (buf
  71            ,(h = gethostbyname (name)) != NULL ? h->h_name : name
  72            ,maxSize - 1);
  73   return TRUE;
  74 #endif
  75 }
  76
  77 // Get user ID e.g. jacs
  78 bool wxGetUserId(char *buf, int maxSize)
  79 {
  80 #ifdef VMS
  81   *buf = '\0'; // return empty string
  82   return FALSE;
  83 #else
  84   struct passwd *who;
  85
  86   if ((who = getpwuid (getuid ())) != NULL)
  87     {
  88       strncpy (buf, who->pw_name, maxSize - 1);
  89       return TRUE;
  90     }
  91   return FALSE;
  92 #endif
  93 }
  94
  95 // Get user name e.g. Julian Smart
  96 bool wxGetUserName(char *buf, int maxSize)
  97 {
  98 #ifdef VMS
  99   *buf = '\0'; // return empty string
 100   return FALSE;
 101 #else
 102   struct passwd *who;
 103
 104   if ((who = getpwuid (getuid ())) != NULL)
 105     {
 106       strncpy (buf, who->pw_gecos, maxSize - 1);
 107       return TRUE;
 108     }
 109   return FALSE;
 110 #endif
 111 }
 112
 113 int wxKill(long pid, int sig)
 114 {
 115   int unixSignal = 0;
 116   switch (sig)
 117   {
 118     case wxSIGTERM:
 119     default:
 120       unixSignal = SIGTERM;
 121   }
 122   return kill( (int)pid, unixSignal);
 123 }
 124
 125 //
 126 // Execute a program in an Interactive Shell
 127 //
 128 bool wxShell(const wxString& command)
 129 {
 130 #ifdef VMS
 131   return(FALSE);
 132 #else
 133 #if defined(sun) || defined(__ultrix) || defined(__bsdi__)
 134   pid_t pid = vfork ();
 135 #else
 136   pid_t pid = fork ();
 137 #endif
 138   switch( pid ) {
 139     case -1:                    /* error */
 140         return(FALSE);
 141     case 0:                     /* child */
 142         // Generic X windows terminal window
 143         if (command != "")
 144           execlp("xterm", "-e", (char *) (const char*) command, NULL);
 145         else
 146           execlp("xterm", NULL);
 147         _exit(127);
 148   }
 149   return TRUE;
 150 #endif
 151  // End VMS
 152 }
 153
 154 // Get free memory in bytes, or -1 if cannot determine amount (e.g. on UNIX)
 155 long wxGetFreeMemory()
 156 {
 157     return -1;
 158 }
 159
 160 void wxSleep(int nSecs)
 161 {
 162   sleep(nSecs);
 163 }
 164
 165 // Consume all events until no more left
 166 void wxFlushEvents()
 167 {
 168   Display *display = (Display*) wxGetDisplay();
 169
 170   XSync (display, FALSE);
 171   XEvent event;
 172   // XtAppPending returns availability of events AND timers/inputs, which
 173   // are processed via callbacks, so XtAppNextEvent will not return if
 174   // there are no events. So added '& XtIMXEvent' - Sergey.
 175   while (XtAppPending ((XtAppContext) wxTheApp->GetAppContext()) & XtIMXEvent)
 176     {
 177       XFlush (XtDisplay ((Widget) wxTheApp->GetTopLevelWidget()));
 178       // Jan Lessner: works better when events are non-X events
 179       XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMXEvent);
 180     }
 181 }
 182
 183 // Output a debug message, in a system dependent fashion.
 184 void wxDebugMsg(const char *fmt ...)
 185 {
 186   va_list ap;
 187   char buffer[BUFSIZ];
 188
 189   if (!wxTheApp->GetWantDebugOutput())
 190     return ;
 191
 192   va_start (ap, fmt);
 193
 194   vsprintf (buffer, fmt, ap);
 195   cerr << buffer;
 196
 197   va_end (ap);
 198 }
 199
 200 // Non-fatal error: pop up message box and (possibly) continue
 201 void wxError(const wxString& msg, const wxString& title)
 202 {
 203   cerr << (const char*) title << ": " << (const char*) msg << "\n";
 204 }
 205
 206 // Fatal error: pop up message box and abort
 207 void wxFatalError(const wxString& msg, const wxString& title)
 208 {
 209   cerr << (const char*) title << ": " << (const char*) msg << "\n";
 210   exit (1);
 211 }
 212
 213 // Emit a beeeeeep
 214 void wxBell()
 215 {
 216   // Use current setting for the bell
 217   XBell ((Display*) wxGetDisplay(), 0);
 218 }
 219
 220 int wxGetOsVersion(int *majorVsn, int *minorVsn)
 221 {
 222     // TODO
 223   // This code is WRONG!! Does NOT return the
 224   // Motif version of the libs but the X protocol
 225   // version! @@@@@ Fix ME!!!!!!!!!
 226   Display *display = XtDisplay ((Widget) wxTheApp->GetTopLevelWidget());
 227   if (majorVsn)
 228     *majorVsn = ProtocolVersion (display);
 229   if (minorVsn)
 230     *minorVsn = ProtocolRevision (display);
 231   return wxMOTIF_X;
 232 }
 233
 234 // Reading and writing resources (eg WIN.INI, .Xdefaults)
 235 #if wxUSE_RESOURCES
 236
 237 static char *GetResourcePath(char *buf, const char *name, bool create = FALSE)
 238 {
 239   if (create && wxFileExists (name) ) {
 240     strcpy(buf, name);
 241     return buf; // Exists so ...
 242   }
 243
 244   if (*name == '/')
 245     strcpy(buf, name);
 246   else {
 247     // Put in standard place for resource files if not absolute
 248     strcpy (buf, DEFAULT_XRESOURCE_DIR);
 249     strcat (buf, "/");
 250     strcat (buf, (const char*) wxFileNameFromPath (name));
 251   }
 252
 253   if (create) {
 254     // Touch the file to create it
 255     FILE *fd = fopen (buf, "w");
 256     if (fd) fclose (fd);
 257   }
 258   return buf;
 259 }
 260
 261 /*
 262  * We have a cache for writing different resource files,
 263  * which will only get flushed when we call wxFlushResources().
 264  * Build up a list of resource databases waiting to be written.
 265  *
 266  */
 267
 268 wxList wxResourceCache (wxKEY_STRING);
 269
 270 void
 271 wxFlushResources (void)
 272 {
 273   char nameBuffer[512];
 274
 275   wxNode *node = wxResourceCache.First ();
 276   while (node)
 277     {
 278       char *file = node->key.string;
 279       // If file doesn't exist, create it first.
 280       (void)GetResourcePath(nameBuffer, file, TRUE);
 281
 282       XrmDatabase database = (XrmDatabase) node->Data ();
 283       XrmPutFileDatabase (database, nameBuffer);
 284       XrmDestroyDatabase (database);
 285       wxNode *next = node->Next ();
 286       delete node;
 287       node = next;
 288     }
 289 }
 290
 291 static XrmDatabase wxResourceDatabase = 0;
 292
 293 void wxXMergeDatabases (wxApp * theApp, Display * display);
 294
 295 bool wxWriteResource(const wxString& section, const wxString& entry, const wxString& value, const wxString& file)
 296 {
 297   char buffer[500];
 298
 299   (void) GetIniFile (buffer, file);
 300
 301   XrmDatabase database;
 302   wxNode *node = wxResourceCache.Find (buffer);
 303   if (node)
 304     database = (XrmDatabase) node->Data ();
 305   else
 306     {
 307       database = XrmGetFileDatabase (buffer);
 308       wxResourceCache.Append (buffer, (wxObject *) database);
 309     }
 310
 311   char resName[300];
 312   strcpy (resName, (const char*) section);
 313   strcat (resName, ".");
 314   strcat (resName, (const char*) entry);
 315
 316   XrmPutStringResource (&database, resName, value);
 317   return TRUE;
 318 }
 319
 320 bool wxWriteResource(const wxString& section, const wxString& entry, float value, const wxString& file)
 321 {
 322   char buf[50];
 323   sprintf(buf, "%.4f", value);
 324   return wxWriteResource(section, entry, buf, file);
 325 }
 326
 327 bool wxWriteResource(const wxString& section, const wxString& entry, long value, const wxString& file)
 328 {
 329   char buf[50];
 330   sprintf(buf, "%ld", value);
 331   return wxWriteResource(section, entry, buf, file);
 332 }
 333
 334 bool wxWriteResource(const wxString& section, const wxString& entry, int value, const wxString& file)
 335 {
 336   char buf[50];
 337   sprintf(buf, "%d", value);
 338   return wxWriteResource(section, entry, buf, file);
 339 }
 340
 341 bool wxGetResource(const wxString& section, const wxString& entry, char **value, const wxString& file)
 342 {
 343   if (!wxResourceDatabase)
 344     {
 345       Display *display = (Display*) wxGetDisplay();
 346       wxXMergeDatabases (wxTheApp, display);
 347     }
 348
 349   XrmDatabase database;
 350
 351   if (file != "")
 352   {
 353       char buffer[500];
 354
 355       // Is this right? Trying to get it to look in the user's
 356       // home directory instead of current directory -- JACS
 357       (void) GetIniFile (buffer, file);
 358
 359       wxNode *node = wxResourceCache.Find (buffer);
 360       if (node)
 361         database = (XrmDatabase) node->Data ();
 362       else
 363         {
 364           database = XrmGetFileDatabase (buffer);
 365           wxResourceCache.Append (buffer, (wxObject *) database);
 366         }
 367   }
 368   else
 369     database = wxResourceDatabase;
 370
 371   XrmValue xvalue;
 372   char *str_type[20];
 373   char buf[150];
 374   strcpy (buf, section);
 375   strcat (buf, ".");
 376   strcat (buf, entry);
 377
 378   Bool success = XrmGetResource (database, buf, "*", str_type,
 379                                  &xvalue);
 380   // Try different combinations of upper/lower case, just in case...
 381   if (!success)
 382     {
 383       buf[0] = (isupper (buf[0]) ? tolower (buf[0]) : toupper (buf[0]));
 384       success = XrmGetResource (database, buf, "*", str_type,
 385                                 &xvalue);
 386     }
 387   if (success)
 388     {
 389       if (*value)
 390         delete[] *value;
 391
 392       *value = new char[xvalue.size + 1];
 393       strncpy (*value, xvalue.addr, (int) xvalue.size);
 394       return TRUE;
 395     }
 396   return FALSE;
 397 }
 398
 399 bool wxGetResource(const wxString& section, const wxString& entry, float *value, const wxString& file)
 400 {
 401   char *s = NULL;
 402   bool succ = wxGetResource(section, entry, (char **)&s, file);
 403   if (succ)
 404   {
 405     *value = (float)strtod(s, NULL);
 406     delete[] s;
 407     return TRUE;
 408   }
 409   else return FALSE;
 410 }
 411
 412 bool wxGetResource(const wxString& section, const wxString& entry, long *value, const wxString& file)
 413 {
 414   char *s = NULL;
 415   bool succ = wxGetResource(section, entry, (char **)&s, file);
 416   if (succ)
 417   {
 418     *value = strtol(s, NULL, 10);
 419     delete[] s;
 420     return TRUE;
 421   }
 422   else return FALSE;
 423 }
 424
 425 bool wxGetResource(const wxString& section, const wxString& entry, int *value, const wxString& file)
 426 {
 427   char *s = NULL;
 428   bool succ = wxGetResource(section, entry, (char **)&s, file);
 429   if (succ)
 430   {
 431       // Handle True, False here
 432       // True, Yes, Enables, Set or  Activated
 433       if (*s == 'T' || *s == 'Y' || *s == 'E' || *s == 'S' || *s == 'A')
 434         *value = TRUE;
 435       // False, No, Disabled, Reset, Cleared, Deactivated
 436       else if (*s == 'F' || *s == 'N' || *s == 'D' || *s == 'R' || *s == 'C')
 437         *value = FALSE;
 438       // Handle as Integer
 439       else
 440         *value = (int) strtol (s, NULL, 10);
 441         delete[] s;
 442         return TRUE;
 443   }
 444   else
 445     return FALSE;
 446 }
 447
 448 void wxXMergeDatabases (wxApp * theApp, Display * display)
 449 {
 450   XrmDatabase homeDB, serverDB, applicationDB;
 451   char filenamebuf[1024];
 452
 453   char *filename = &filenamebuf[0];
 454   char *environment;
 455   wxString classname = theApp->GetClassName();
 456   char name[256];
 457   (void) strcpy (name, "/usr/lib/X11/app-defaults/");
 458   (void) strcat (name, (const char*) classname);
 459
 460   /* Get application defaults file, if any */
 461   applicationDB = XrmGetFileDatabase (name);
 462   (void) XrmMergeDatabases (applicationDB, &wxResourceDatabase);
 463
 464   /* Merge server defaults, created by xrdb, loaded as a property of the root
 465    * window when the server initializes and loaded into the display
 466    * structure on XOpenDisplay;
 467    * if not defined, use .Xdefaults
 468    */
 469
 470   if (XResourceManagerString (display) != NULL)
 471     {
 472       serverDB = XrmGetStringDatabase (XResourceManagerString (display));
 473     }
 474   else
 475     {
 476       (void) GetIniFile (filename, NULL);
 477       serverDB = XrmGetFileDatabase (filename);
 478     }
 479   XrmMergeDatabases (serverDB, &wxResourceDatabase);
 480
 481   /* Open XENVIRONMENT file, or if not defined, the .Xdefaults,
 482    * and merge into existing database
 483    */
 484
 485   if ((environment = getenv ("XENVIRONMENT")) == NULL)
 486     {
 487       size_t len;
 488       environment = GetIniFile (filename, NULL);
 489       len = strlen (environment);
 490 #if defined(SVR4) && !defined(__hpux)
 491       (void) sysinfo (SI_HOSTNAME, environment + len, 1024 - len);
 492 #else
 493       (void) gethostname (environment + len, 1024 - len);
 494 #endif
 495     }
 496   homeDB = XrmGetFileDatabase (environment);
 497   XrmMergeDatabases (homeDB, &wxResourceDatabase);
 498 }
 499
 500 #if 0
 501
 502 /*
 503  * Not yet used but may be useful.
 504  *
 505  */
 506 void
 507 wxSetDefaultResources (const Widget w, const char **resourceSpec, const char *name)
 508 {
 509   int i;
 510   Display *dpy = XtDisplay (w); // Retrieve the display pointer
 511
 512   XrmDatabase rdb = NULL;       // A resource data base
 513
 514   // Create an empty resource database
 515   rdb = XrmGetStringDatabase ("");
 516
 517   // Add the Component resources, prepending the name of the component
 518
 519   i = 0;
 520   while (resourceSpec[i] != NULL)
 521     {
 522       char buf[1000];
 523
 524       sprintf (buf, "*%s%s", name, resourceSpec[i++]);
 525       XrmPutLineResource (&rdb, buf);
 526     }
 527
 528   // Merge them into the Xt database, with lowest precendence
 529
 530   if (rdb)
 531     {
 532 #if (XlibSpecificationRelease>=5)
 533       XrmDatabase db = XtDatabase (dpy);
 534       XrmCombineDatabase (rdb, &db, FALSE);
 535 #else
 536       XrmMergeDatabases (dpy->db, &rdb);
 537       dpy->db = rdb;
 538 #endif
 539     }
 540 }
 541 #endif
 542    // 0
 543
 544 #endif // wxUSE_RESOURCES
 545
 546 static int wxBusyCursorCount = 0;
 547
 548 // Helper function
 549 static void
 550 wxXSetBusyCursor (wxWindow * win, wxCursor * cursor)
 551 {
 552   Display *display = (Display*) win->GetXDisplay();
 553
 554   Window xwin = (Window) win->GetXWindow();
 555   XSetWindowAttributes attrs;
 556
 557   if (cursor)
 558     {
 559       attrs.cursor = (Cursor) cursor->GetXCursor(display);
 560     }
 561   else
 562     {
 563       // Restore old cursor
 564       if (win->GetCursor()->Ok())
 565         attrs.cursor = (Cursor) win->GetCursor()->GetXCursor(display);
 566       else
 567         attrs.cursor = None;
 568     }
 569   if (xwin)
 570     XChangeWindowAttributes (display, xwin, CWCursor, &attrs);
 571
 572   XFlush (display);
 573
 574   for(wxNode *node = win->GetChildren()->First (); node; node = node->Next())
 575   {
 576         wxWindow *child = (wxWindow *) node->Data ();
 577             wxXSetBusyCursor (child, cursor);
 578   }
 579 }
 580
 581 // Set the cursor to the busy cursor for all windows
 582 void wxBeginBusyCursor(wxCursor *cursor)
 583 {
 584   wxBusyCursorCount++;
 585   if (wxBusyCursorCount == 1)
 586   {
 587     for(wxNode *node = wxTopLevelWindows.First (); node; node = node->Next())
 588     {
 589         wxWindow *win = (wxWindow *) node->Data ();
 590         wxXSetBusyCursor (win, cursor);
 591     }
 592   }
 593 }
 594
 595 // Restore cursor to normal
 596 void wxEndBusyCursor()
 597 {
 598   if (wxBusyCursorCount == 0)
 599     return;
 600
 601   wxBusyCursorCount--;
 602   if (wxBusyCursorCount == 0)
 603   {
 604       for(wxNode *node = wxTopLevelWindows.First (); node; node = node->Next())
 605       {
 606             wxWindow *win = (wxWindow *) node->Data ();
 607             wxXSetBusyCursor (win, NULL);
 608       }
 609   }
 610 }
 611
 612 // TRUE if we're between the above two calls
 613 bool wxIsBusy()
 614 {
 615   return (wxBusyCursorCount > 0);
 616 }
 617
 618 const char* wxGetHomeDir( wxString *home  )
 619 {
 620   *home = wxGetUserHome( wxString() );
 621   if (home->IsNull()) *home = "/";
 622   return *home;
 623 };
 624
 625 char *wxGetUserHome (const wxString& user)
 626 {
 627 #ifdef VMS
 628   return(NULL);
 629 #else
 630   struct passwd *who = NULL;
 631
 632   if (user == "") {
 633     register char *ptr;
 634
 635     if ((ptr = getenv("HOME")) != NULL)
 636       return ptr;
 637     if ((ptr = getenv("USER")) != NULL ||
 638         (ptr = getenv("LOGNAME")) != NULL)
 639       {
 640         who = getpwnam( ptr );
 641       }
 642     // We now make sure the the user exists!
 643     if (who == NULL)
 644       who = getpwuid( getuid() );
 645   } else
 646     who = getpwnam ((const char*) user);
 647
 648   return who ? who->pw_dir : (char*) NULL;
 649 #endif
 650  // ifdef VMS
 651 }
 652
 653 // Check whether this window wants to process messages, e.g. Stop button
 654 // in long calculations.
 655 bool wxCheckForInterrupt(wxWindow *wnd)
 656 {
 657         if(wnd){
 658                 Display *dpy=(Display*) wnd->GetXDisplay();
 659                 Window win=(Window) wnd->GetXWindow();
 660                 XEvent event;
 661                 XFlush(dpy);
 662                 if(wnd->GetMainWidget()){
 663                         XmUpdateDisplay((Widget)(wnd->GetMainWidget()));
 664                 }
 665                 while(XCheckMaskEvent(dpy,
 666                                                         ButtonPressMask|ButtonReleaseMask|ButtonMotionMask|
 667                                                         PointerMotionMask|KeyPressMask|KeyReleaseMask,
 668                                                         &event)){
 669                         if(event.xany.window==win)
 670                                 XtDispatchEvent(&event);
 671         //              else
 672         //                      XBell(dpy,50);
 673                 }
 674                 return TRUE;//*** temporary?
 675         }
 676         else{
 677                 wxMessageBox("wnd==NULL !!!");
 678                 return FALSE;//*** temporary?
 679         }
 680 }
 681
 682 void wxGetMousePosition( int* x, int* y )
 683 {
 684     XMotionEvent xev;
 685     Window root, child;
 686     XQueryPointer((Display*) wxGetDisplay(),
 687                   DefaultRootWindow((Display*) wxGetDisplay()), &root, &child,
 688                   &(xev.x_root), &(xev.y_root),
 689                   &(xev.x),      &(xev.y),
 690                   &(xev.state));
 691     *x = xev.x_root;
 692     *y = xev.y_root;
 693 };
 694
 695 // Return TRUE if we have a colour display
 696 bool wxColourDisplay()
 697 {
 698     Display *dpy = (Display*) wxGetDisplay();
 699
 700     if (DefaultDepth (dpy, DefaultScreen (dpy)) < 2)
 701       return FALSE;
 702     else
 703       return TRUE;
 704 }
 705
 706 // Returns depth of screen
 707 int wxDisplayDepth()
 708 {
 709     Display *dpy = (Display*) wxGetDisplay();
 710     return DefaultDepth (dpy, DefaultScreen (dpy));
 711 }
 712
 713 // Get size of display
 714 void wxDisplaySize(int *width, int *height)
 715 {
 716   Display *dpy = (Display*) wxGetDisplay();
 717
 718   *width = DisplayWidth (dpy, DefaultScreen (dpy));
 719   *height = DisplayHeight (dpy, DefaultScreen (dpy));
 720 }
 721
 722 /* Configurable display in Motif */
 723 static WXDisplay *gs_currentDisplay = NULL;
 724 static wxString gs_displayName;
 725
 726 WXDisplay *wxGetDisplay()
 727 {
 728   if (gs_currentDisplay)
 729     return gs_currentDisplay;
 730
 731   if (wxTheApp && wxTheApp->GetTopLevelWidget())
 732     return XtDisplay ((Widget) wxTheApp->GetTopLevelWidget());
 733   else if (wxTheApp)
 734     return wxTheApp->GetInitialDisplay();
 735   else
 736     return (WXDisplay*) NULL;
 737 }
 738
 739 bool wxSetDisplay(const wxString& display_name)
 740 {
 741   gs_displayName = display_name;
 742
 743   if (display_name.IsNull() || display_name.IsEmpty())
 744   {
 745       gs_currentDisplay = NULL;
 746       return TRUE;
 747   }
 748   else
 749   {
 750     Cardinal argc = 0;
 751
 752     Display *display = XtOpenDisplay((XtAppContext) wxTheApp->GetAppContext(),
 753                                      (const char*) display_name,
 754                                      (const char*) wxTheApp->GetAppName(),
 755                                      (const char*) wxTheApp->GetClassName(),
 756                                      NULL,
 757 # if XtSpecificationRelease < 5
 758                                      0, &argc, NULL);
 759 # else
 760                                      0, (int *)&argc, NULL);
 761 # endif
 762
 763     if (display)
 764     {
 765       gs_currentDisplay = (WXDisplay*) display;
 766       return TRUE;
 767     } else
 768       return FALSE;
 769   }
 770   return FALSE;
 771 }
 772
 773 wxString wxGetDisplayName()
 774 {
 775   return gs_displayName;
 776 }
 777
 778 // Find the letter corresponding to the mnemonic, for Motif
 779 char wxFindMnemonic (const char *s)
 780 {
 781   char mnem = 0;
 782   int len = strlen (s);
 783   int i;
 784   for (i = 0; i < len; i++)
 785     {
 786       if (s[i] == '&')
 787         {
 788           // Carefully handle &&
 789           if ((i + 1) <= len && s[i + 1] == '&')
 790             i++;
 791           else
 792             {
 793               mnem = s[i + 1];
 794               break;
 795             }
 796         }
 797     }
 798   return mnem;
 799 }
 800
 801 char * wxFindAccelerator (char *s)
 802 {
 803 // The accelerator text is after the \t char.
 804   while (*s && *s != '\t')
 805     s++;
 806   if (*s == '\0')
 807     return (NULL);
 808   s++;
 809 /*
 810    Now we need to format it as X standard:
 811
 812    input            output
 813
 814    F7           --> <Key>F7
 815    Ctrl+N       --> Ctrl<Key>N
 816    Alt+k        --> Meta<Key>k
 817    Ctrl+Shift+A --> Ctrl Shift<Key>A
 818
 819  */
 820
 821   wxBuffer[0] = '\0';
 822   char *tmp = copystring (s);
 823   s = tmp;
 824   char *p = s;
 825
 826   while (1)
 827     {
 828       while (*p && *p != '+')
 829         p++;
 830       if (*p)
 831         {
 832           *p = '\0';
 833           if (wxBuffer[0])
 834             strcat (wxBuffer, " ");
 835           if (strcmp (s, "Alt"))
 836             strcat (wxBuffer, s);
 837           else
 838             strcat (wxBuffer, "Meta");
 839           s = p + 1;
 840           p = s;
 841         }
 842       else
 843         {
 844           strcat (wxBuffer, "<Key>");
 845           strcat (wxBuffer, s);
 846           break;
 847         }
 848     }
 849   delete[]tmp;
 850   return wxBuffer;
 851 }
 852
 853 XmString wxFindAcceleratorText (char *s)
 854 {
 855 // The accelerator text is after the \t char.
 856   while (*s && *s != '\t')
 857     s++;
 858   if (*s == '\0')
 859     return (NULL);
 860   s++;
 861   XmString text = XmStringCreateSimple (s);
 862   return text;
 863 }
 864
 865 #include <X11/keysym.h>
 866
 867 int wxCharCodeXToWX(KeySym keySym)
 868 {
 869   int id;
 870   switch (keySym) {
 871     case XK_Shift_L:
 872     case XK_Shift_R:
 873       id = WXK_SHIFT; break;
 874     case XK_Control_L:
 875     case XK_Control_R:
 876       id = WXK_CONTROL; break;
 877     case XK_BackSpace:
 878       id = WXK_BACK; break;
 879     case XK_Delete:
 880       id = WXK_DELETE; break;
 881     case XK_Clear:
 882       id = WXK_CLEAR; break;
 883     case XK_Tab:
 884       id = WXK_TAB; break;
 885     case XK_numbersign:
 886       id = '#'; break;
 887     case XK_Return:
 888       id = WXK_RETURN; break;
 889     case XK_Escape:
 890       id = WXK_ESCAPE; break;
 891     case XK_Pause:
 892     case XK_Break:
 893       id = WXK_PAUSE; break;
 894     case XK_Num_Lock:
 895       id = WXK_NUMLOCK; break;
 896     case XK_Scroll_Lock:
 897       id = WXK_SCROLL; break;
 898
 899     case XK_Home:
 900       id = WXK_HOME; break;
 901     case XK_End:
 902       id = WXK_END; break;
 903     case XK_Left:
 904       id = WXK_LEFT; break;
 905     case XK_Right:
 906       id = WXK_RIGHT; break;
 907     case XK_Up:
 908       id = WXK_UP; break;
 909     case XK_Down:
 910       id = WXK_DOWN; break;
 911     case XK_Next:
 912       id = WXK_NEXT; break;
 913     case XK_Prior:
 914       id = WXK_PRIOR; break;
 915     case XK_Menu:
 916       id = WXK_MENU; break;
 917     case XK_Select:
 918       id = WXK_SELECT; break;
 919     case XK_Cancel:
 920       id = WXK_CANCEL; break;
 921     case XK_Print:
 922       id = WXK_PRINT; break;
 923     case XK_Execute:
 924       id = WXK_EXECUTE; break;
 925     case XK_Insert:
 926       id = WXK_INSERT; break;
 927     case XK_Help:
 928       id = WXK_HELP; break;
 929
 930     case XK_KP_Multiply:
 931       id = WXK_MULTIPLY; break;
 932     case XK_KP_Add:
 933       id = WXK_ADD; break;
 934     case XK_KP_Subtract:
 935       id = WXK_SUBTRACT; break;
 936     case XK_KP_Divide:
 937       id = WXK_DIVIDE; break;
 938     case XK_KP_Decimal:
 939       id = WXK_DECIMAL; break;
 940     case XK_KP_Equal:
 941       id = '='; break;
 942     case XK_KP_Space:
 943       id = ' '; break;
 944     case XK_KP_Tab:
 945       id = WXK_TAB; break;
 946     case XK_KP_Enter:
 947       id = WXK_RETURN; break;
 948     case XK_KP_0:
 949       id = WXK_NUMPAD0; break;
 950     case XK_KP_1:
 951       id = WXK_NUMPAD1; break;
 952     case XK_KP_2:
 953       id = WXK_NUMPAD2; break;
 954     case XK_KP_3:
 955       id = WXK_NUMPAD3; break;
 956     case XK_KP_4:
 957       id = WXK_NUMPAD4; break;
 958     case XK_KP_5:
 959       id = WXK_NUMPAD5; break;
 960     case XK_KP_6:
 961       id = WXK_NUMPAD6; break;
 962     case XK_KP_7:
 963       id = WXK_NUMPAD7; break;
 964     case XK_KP_8:
 965       id = WXK_NUMPAD8; break;
 966     case XK_KP_9:
 967       id = WXK_NUMPAD9; break;
 968     case XK_F1:
 969       id = WXK_F1; break;
 970     case XK_F2:
 971       id = WXK_F2; break;
 972     case XK_F3:
 973       id = WXK_F3; break;
 974     case XK_F4:
 975       id = WXK_F4; break;
 976     case XK_F5:
 977       id = WXK_F5; break;
 978     case XK_F6:
 979       id = WXK_F6; break;
 980     case XK_F7:
 981       id = WXK_F7; break;
 982     case XK_F8:
 983       id = WXK_F8; break;
 984     case XK_F9:
 985       id = WXK_F9; break;
 986     case XK_F10:
 987       id = WXK_F10; break;
 988     case XK_F11:
 989       id = WXK_F11; break;
 990     case XK_F12:
 991       id = WXK_F12; break;
 992     case XK_F13:
 993       id = WXK_F13; break;
 994     case XK_F14:
 995       id = WXK_F14; break;
 996     case XK_F15:
 997       id = WXK_F15; break;
 998     case XK_F16:
 999       id = WXK_F16; break;
1000     case XK_F17:
1001       id = WXK_F17; break;
1002     case XK_F18:
1003       id = WXK_F18; break;
1004     case XK_F19:
1005       id = WXK_F19; break;
1006     case XK_F20:
1007       id = WXK_F20; break;
1008     case XK_F21:
1009       id = WXK_F21; break;
1010     case XK_F22:
1011       id = WXK_F22; break;
1012     case XK_F23:
1013       id = WXK_F23; break;
1014     case XK_F24:
1015       id = WXK_F24; break;
1016     default:
1017       id = (keySym <= 255) ? (int)keySym : -1;
1018   } // switch
1019   return id;
1020 }
1021
1022 KeySym wxCharCodeWXToX(int id)
1023 {
1024   KeySym keySym;
1025
1026   switch (id) {
1027     case WXK_CANCEL:            keySym = XK_Cancel; break;
1028     case WXK_BACK:              keySym = XK_BackSpace; break;
1029     case WXK_TAB:               keySym = XK_Tab; break;
1030     case WXK_CLEAR:             keySym = XK_Clear; break;
1031     case WXK_RETURN:            keySym = XK_Return; break;
1032     case WXK_SHIFT:             keySym = XK_Shift_L; break;
1033     case WXK_CONTROL:           keySym = XK_Control_L; break;
1034     case WXK_MENU :             keySym = XK_Menu; break;
1035     case WXK_PAUSE:             keySym = XK_Pause; break;
1036     case WXK_ESCAPE:            keySym = XK_Escape; break;
1037     case WXK_SPACE:             keySym = ' '; break;
1038     case WXK_PRIOR:             keySym = XK_Prior; break;
1039     case WXK_NEXT :             keySym = XK_Next; break;
1040     case WXK_END:               keySym = XK_End; break;
1041     case WXK_HOME :             keySym = XK_Home; break;
1042     case WXK_LEFT :             keySym = XK_Left; break;
1043     case WXK_UP:                keySym = XK_Up; break;
1044     case WXK_RIGHT:             keySym = XK_Right; break;
1045     case WXK_DOWN :             keySym = XK_Down; break;
1046     case WXK_SELECT:            keySym = XK_Select; break;
1047     case WXK_PRINT:             keySym = XK_Print; break;
1048     case WXK_EXECUTE:           keySym = XK_Execute; break;
1049     case WXK_INSERT:            keySym = XK_Insert; break;
1050     case WXK_DELETE:            keySym = XK_Delete; break;
1051     case WXK_HELP :             keySym = XK_Help; break;
1052     case WXK_NUMPAD0:           keySym = XK_KP_0; break;
1053     case WXK_NUMPAD1:           keySym = XK_KP_1; break;
1054     case WXK_NUMPAD2:           keySym = XK_KP_2; break;
1055     case WXK_NUMPAD3:           keySym = XK_KP_3; break;
1056     case WXK_NUMPAD4:           keySym = XK_KP_4; break;
1057     case WXK_NUMPAD5:           keySym = XK_KP_5; break;
1058     case WXK_NUMPAD6:           keySym = XK_KP_6; break;
1059     case WXK_NUMPAD7:           keySym = XK_KP_7; break;
1060     case WXK_NUMPAD8:           keySym = XK_KP_8; break;
1061     case WXK_NUMPAD9:           keySym = XK_KP_9; break;
1062     case WXK_MULTIPLY:          keySym = XK_KP_Multiply; break;
1063     case WXK_ADD:               keySym = XK_KP_Add; break;
1064     case WXK_SUBTRACT:          keySym = XK_KP_Subtract; break;
1065     case WXK_DECIMAL:           keySym = XK_KP_Decimal; break;
1066     case WXK_DIVIDE:            keySym = XK_KP_Divide; break;
1067     case WXK_F1:                keySym = XK_F1; break;
1068     case WXK_F2:                keySym = XK_F2; break;
1069     case WXK_F3:                keySym = XK_F3; break;
1070     case WXK_F4:                keySym = XK_F4; break;
1071     case WXK_F5:                keySym = XK_F5; break;
1072     case WXK_F6:                keySym = XK_F6; break;
1073     case WXK_F7:                keySym = XK_F7; break;
1074     case WXK_F8:                keySym = XK_F8; break;
1075     case WXK_F9:                keySym = XK_F9; break;
1076     case WXK_F10:               keySym = XK_F10; break;
1077     case WXK_F11:               keySym = XK_F11; break;
1078     case WXK_F12:               keySym = XK_F12; break;
1079     case WXK_F13:               keySym = XK_F13; break;
1080     case WXK_F14:               keySym = XK_F14; break;
1081     case WXK_F15:               keySym = XK_F15; break;
1082     case WXK_F16:               keySym = XK_F16; break;
1083     case WXK_F17:               keySym = XK_F17; break;
1084     case WXK_F18:               keySym = XK_F18; break;
1085     case WXK_F19:               keySym = XK_F19; break;
1086     case WXK_F20:               keySym = XK_F20; break;
1087     case WXK_F21:               keySym = XK_F21; break;
1088     case WXK_F22:               keySym = XK_F22; break;
1089     case WXK_F23:               keySym = XK_F23; break;
1090     case WXK_F24:               keySym = XK_F24; break;
1091     case WXK_NUMLOCK:           keySym = XK_Num_Lock; break;
1092     case WXK_SCROLL:            keySym = XK_Scroll_Lock; break;
1093     default:                    keySym = id <= 255 ? (KeySym)id : 0;
1094   } // switch
1095   return keySym;
1096 }
1097
1098 // Read $HOME for what it says is home, if not
1099 // read $USER or $LOGNAME for user name else determine
1100 // the Real User, then determine the Real home dir.
1101 static char * GetIniFile (char *dest, const char *filename)
1102 {
1103   char *home = NULL;
1104   if (filename && wxIsAbsolutePath(filename))
1105   {
1106     strcpy(dest, filename);
1107   }
1108   else if ((home = wxGetUserHome("")) != NULL)
1109   {
1110     strcpy(dest, home);
1111     if (dest[strlen(dest) - 1] != '/')
1112       strcat (dest, "/");
1113     if (filename == NULL)
1114       {
1115         if ((filename = getenv ("XENVIRONMENT")) == NULL)
1116           filename = ".Xdefaults";
1117       }
1118     else if (*filename != '.')
1119       strcat (dest, ".");
1120     strcat (dest, filename);
1121   } else
1122   {
1123     dest[0] = '\0';
1124   }
1125   return dest;
1126 }
1127
1128 /*
1129  * Some colour manipulation routines
1130  */
1131
1132 void wxHSVToXColor(wxHSV *hsv,XColor *rgb)
1133    {
1134      int h = hsv->h;
1135      int s = hsv->s;
1136      int v = hsv->v;
1137      int r, g, b;
1138      int i, f;
1139      int p, q, t;
1140      s = (s * wxMAX_RGB) / wxMAX_SV;
1141      v = (v * wxMAX_RGB) / wxMAX_SV;
1142      if (h == 360) h = 0;
1143      if (s == 0) { h = 0; r = g = b = v; }
1144      i = h / 60;
1145      f = h % 60;
1146      p = v * (wxMAX_RGB - s) / wxMAX_RGB;
1147      q = v * (wxMAX_RGB - s * f / 60) / wxMAX_RGB;
1148      t = v * (wxMAX_RGB - s * (60 - f) / 60) / wxMAX_RGB;
1149      switch (i)
1150         {
1151           case 0: r = v, g = t, b = p; break;
1152           case 1: r = q, g = v, b = p; break;
1153           case 2: r = p, g = v, b = t; break;
1154           case 3: r = p, g = q, b = v; break;
1155           case 4: r = t, g = p, b = v; break;
1156           case 5: r = v, g = p, b = q; break;
1157         }
1158      rgb->red = r << 8;
1159      rgb->green = g << 8;
1160      rgb->blue = b << 8;
1161    }
1162
1163 void wxXColorToHSV(wxHSV *hsv,XColor *rgb)
1164    {
1165      int r = rgb->red >> 8;
1166      int g = rgb->green >> 8;
1167      int b = rgb->blue >> 8;
1168      int maxv = wxMax3(r, g, b);
1169      int minv = wxMin3(r, g, b);
1170      int h, s, v;
1171      v = maxv;
1172      if (maxv) s = (maxv - minv) * wxMAX_RGB / maxv;
1173      else s = 0;
1174      if (s == 0) h = 0;
1175      else
1176         {
1177               int rc, gc, bc, hex;
1178               rc = (maxv - r) * wxMAX_RGB / (maxv - minv);
1179               gc = (maxv - g) * wxMAX_RGB / (maxv - minv);
1180               bc = (maxv - b) * wxMAX_RGB / (maxv - minv);
1181               if (r == maxv) { h = bc - gc, hex = 0; }
1182               else if (g == maxv) { h = rc - bc, hex = 2; }
1183                    else if (b == maxv) { h = gc - rc, hex = 4; }
1184               h = hex * 60 + (h * 60 / wxMAX_RGB);
1185               if (h < 0) h += 360;
1186         }
1187      hsv->h = h;
1188      hsv->s = (s * wxMAX_SV) / wxMAX_RGB;
1189      hsv->v = (v * wxMAX_SV) / wxMAX_RGB;
1190    }
1191
1192 void wxAllocNearestColor(Display *d,Colormap cmp,XColor *xc)
1193    {
1194      int llp;
1195
1196      int screen = DefaultScreen(d);
1197      int num_colors = DisplayCells(d,screen);
1198
1199      XColor *color_defs = new XColor[num_colors];
1200      for(llp = 0;llp < num_colors;llp++) color_defs[llp].pixel = llp;
1201      XQueryColors(d,cmp,color_defs,num_colors);
1202
1203      wxHSV hsv_defs, hsv;
1204      wxXColorToHSV(&hsv,xc);
1205
1206      int diff, min_diff, pixel = 0;
1207
1208      for(llp = 0;llp < num_colors;llp++)
1209         {
1210           wxXColorToHSV(&hsv_defs,&color_defs[llp]);
1211           diff = wxSIGN(wxH_WEIGHT * (hsv.h - hsv_defs.h)) +
1212                  wxSIGN(wxS_WEIGHT * (hsv.s - hsv_defs.s)) +
1213                  wxSIGN(wxV_WEIGHT * (hsv.v - hsv_defs.v));
1214           if (llp == 0) min_diff = diff;
1215           if (min_diff > diff) { min_diff = diff; pixel = llp; }
1216           if (min_diff == 0) break;
1217         }
1218
1219      xc -> red = color_defs[pixel].red;
1220      xc -> green = color_defs[pixel].green;
1221      xc -> blue = color_defs[pixel].blue;
1222      xc -> flags = DoRed | DoGreen | DoBlue;
1223      if (!XAllocColor(d,cmp,xc))
1224         cout << "wxAllocNearestColor : Warning : Cannot find nearest color !\n";
1225
1226      delete[] color_defs;
1227    }
1228
1229 void wxAllocColor(Display *d,Colormap cmp,XColor *xc)
1230    {
1231      if (!XAllocColor(d,cmp,xc))
1232         {
1233 //          cout << "wxAllocColor : Warning : Can not allocate color, attempt find nearest !\n";
1234           wxAllocNearestColor(d,cmp,xc);
1235         }
1236    }
1237
1238