src/common/utilscmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        utilscmn.cpp
   3 // Purpose:     Miscellaneous utility functions and classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "utils.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/app.h"
  33     #include "wx/string.h"
  34     #include "wx/utils.h"
  35     #include "wx/intl.h"
  36     #include "wx/log.h"
  37
  38     #if wxUSE_GUI
  39         #include "wx/window.h"
  40         #include "wx/frame.h"
  41         #include "wx/menu.h"
  42         #include "wx/msgdlg.h"
  43         #include "wx/textdlg.h"
  44         #include "wx/textctrl.h"    // for wxTE_PASSWORD
  45         #if wxUSE_ACCEL
  46             #include "wx/menuitem.h"
  47             #include "wx/accel.h"
  48         #endif // wxUSE_ACCEL
  49     #endif // wxUSE_GUI
  50 #endif // WX_PRECOMP
  51
  52 #include "wx/apptrait.h"
  53
  54 #include "wx/process.h"
  55 #include "wx/txtstrm.h"
  56
  57 #include <ctype.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61
  62 #if !defined(__WATCOMC__)
  63     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  64         #include <errno.h>
  65     #endif
  66 #endif
  67
  68 #if wxUSE_GUI
  69     #include "wx/colordlg.h"
  70     #include "wx/fontdlg.h"
  71     #include "wx/notebook.h"
  72     #include "wx/frame.h"
  73     #include "wx/statusbr.h"
  74 #endif // wxUSE_GUI
  75
  76 #ifndef __WXWINCE__
  77 #include <time.h>
  78 #else
  79 #include "wx/msw/wince/time.h"
  80 #endif
  81
  82 #ifndef __MWERKS__
  83     #include <sys/types.h>
  84     #include <sys/stat.h>
  85 #endif
  86
  87 #ifdef __SALFORDC__
  88     #include <clib.h>
  89 #endif
  90
  91 #ifdef __WXMSW__
  92     #include "wx/msw/private.h"
  93 #endif
  94
  95 #if wxUSE_BASE
  96
  97 // ----------------------------------------------------------------------------
  98 // common data
  99 // ----------------------------------------------------------------------------
 100
 101 #if WXWIN_COMPATIBILITY_2_2
 102     const wxChar *wxInternalErrorStr = wxT("wxWindows Internal Error");
 103     const wxChar *wxFatalErrorStr = wxT("wxWindows Fatal Error");
 104 #endif // WXWIN_COMPATIBILITY_2_2
 105
 106 // ============================================================================
 107 // implementation
 108 // ============================================================================
 109
 110 #if WXWIN_COMPATIBILITY_2_4
 111
 112 wxChar *
 113 copystring (const wxChar *s)
 114 {
 115   if (s == NULL) s = wxT("");
 116   size_t len = wxStrlen (s) + 1;
 117
 118   wxChar *news = new wxChar[len];
 119   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 120
 121   return news;
 122 }
 123
 124 #endif // WXWIN_COMPATIBILITY_2_4
 125
 126 // Id generation
 127 static long wxCurrentId = 100;
 128
 129 long
 130 wxNewId (void)
 131 {
 132   return wxCurrentId++;
 133 }
 134
 135 long
 136 wxGetCurrentId(void) { return wxCurrentId; }
 137
 138 void
 139 wxRegisterId (long id)
 140 {
 141   if (id >= wxCurrentId)
 142     wxCurrentId = id + 1;
 143 }
 144
 145 // ----------------------------------------------------------------------------
 146 // String <-> Number conversions (deprecated)
 147 // ----------------------------------------------------------------------------
 148
 149 #if WXWIN_COMPATIBILITY_2_4
 150
 151 WXDLLIMPEXP_DATA_BASE(const wxChar *) wxFloatToStringStr = wxT("%.2f");
 152 WXDLLIMPEXP_DATA_BASE(const wxChar *) wxDoubleToStringStr = wxT("%.2f");
 153
 154 void
 155 StringToFloat (const wxChar *s, float *number)
 156 {
 157   if (s && *s && number)
 158     *number = (float) wxStrtod (s, (wxChar **) NULL);
 159 }
 160
 161 void
 162 StringToDouble (const wxChar *s, double *number)
 163 {
 164   if (s && *s && number)
 165     *number = wxStrtod (s, (wxChar **) NULL);
 166 }
 167
 168 wxChar *
 169 FloatToString (float number, const wxChar *fmt)
 170 {
 171   static wxChar buf[256];
 172
 173   wxSprintf (buf, fmt, number);
 174   return buf;
 175 }
 176
 177 wxChar *
 178 DoubleToString (double number, const wxChar *fmt)
 179 {
 180   static wxChar buf[256];
 181
 182   wxSprintf (buf, fmt, number);
 183   return buf;
 184 }
 185
 186 void
 187 StringToInt (const wxChar *s, int *number)
 188 {
 189   if (s && *s && number)
 190     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 191 }
 192
 193 void
 194 StringToLong (const wxChar *s, long *number)
 195 {
 196   if (s && *s && number)
 197     *number = wxStrtol (s, (wxChar **) NULL, 10);
 198 }
 199
 200 wxChar *
 201 IntToString (int number)
 202 {
 203   static wxChar buf[20];
 204
 205   wxSprintf (buf, wxT("%d"), number);
 206   return buf;
 207 }
 208
 209 wxChar *
 210 LongToString (long number)
 211 {
 212   static wxChar buf[20];
 213
 214   wxSprintf (buf, wxT("%ld"), number);
 215   return buf;
 216 }
 217
 218 #endif // WXWIN_COMPATIBILITY_2_4
 219
 220 // Array used in DecToHex conversion routine.
 221 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 222
 223 // Convert 2-digit hex number to decimal
 224 int wxHexToDec(const wxString& buf)
 225 {
 226   int firstDigit, secondDigit;
 227
 228   if (buf.GetChar(0) >= wxT('A'))
 229     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 230   else
 231     firstDigit = buf.GetChar(0) - wxT('0');
 232
 233   if (buf.GetChar(1) >= wxT('A'))
 234     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 235   else
 236     secondDigit = buf.GetChar(1) - wxT('0');
 237
 238   return (firstDigit & 0xF) * 16 + (secondDigit & 0xF );
 239 }
 240
 241 // Convert decimal integer to 2-character hex string
 242 void wxDecToHex(int dec, wxChar *buf)
 243 {
 244   int firstDigit = (int)(dec/16.0);
 245   int secondDigit = (int)(dec - (firstDigit*16.0));
 246   buf[0] = hexArray[firstDigit];
 247   buf[1] = hexArray[secondDigit];
 248   buf[2] = 0;
 249 }
 250
 251 // Convert decimal integer to 2-character hex string
 252 wxString wxDecToHex(int dec)
 253 {
 254     wxChar buf[3];
 255     wxDecToHex(dec, buf);
 256     return wxString(buf);
 257 }
 258
 259 // ----------------------------------------------------------------------------
 260 // misc functions
 261 // ----------------------------------------------------------------------------
 262
 263 // Return the current date/time
 264 wxString wxNow()
 265 {
 266     time_t now = time((time_t *) NULL);
 267     char *date = ctime(&now);
 268     date[24] = '\0';
 269     return wxString::FromAscii(date);
 270 }
 271
 272 const wxChar *wxGetInstallPrefix()
 273 {
 274     wxString prefix;
 275
 276     if ( wxGetEnv(wxT("WXPREFIX"), &prefix) )
 277         return prefix.c_str();
 278
 279 #ifdef wxINSTALL_PREFIX
 280     return wxT(wxINSTALL_PREFIX);
 281 #else
 282     return wxT("");
 283 #endif
 284 }
 285
 286 wxString wxGetDataDir()
 287 {
 288     wxString format = wxGetInstallPrefix();
 289     format <<  wxFILE_SEP_PATH
 290            << wxT("share") << wxFILE_SEP_PATH
 291            << wxT("wx") << wxFILE_SEP_PATH
 292            << wxT("%i.%i");
 293     wxString dir;
 294     dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
 295     return dir;
 296 }
 297
 298 int wxGetOsVersion(int *verMaj, int *verMin)
 299 {
 300     // we want this function to work even if there is no wxApp
 301     wxConsoleAppTraits traitsConsole;
 302     wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
 303     if ( ! traits )
 304         traits = &traitsConsole;
 305
 306     return traits->GetOSVersion(verMaj, verMin);
 307 }
 308
 309 // ----------------------------------------------------------------------------
 310 // network and user id functions
 311 // ----------------------------------------------------------------------------
 312
 313 // Get Full RFC822 style email address
 314 bool wxGetEmailAddress(wxChar *address, int maxSize)
 315 {
 316     wxString email = wxGetEmailAddress();
 317     if ( !email )
 318         return FALSE;
 319
 320     wxStrncpy(address, email, maxSize - 1);
 321     address[maxSize - 1] = wxT('\0');
 322
 323     return TRUE;
 324 }
 325
 326 wxString wxGetEmailAddress()
 327 {
 328     wxString email;
 329
 330     wxString host = wxGetFullHostName();
 331     if ( !!host )
 332     {
 333         wxString user = wxGetUserId();
 334         if ( !!user )
 335         {
 336             email << user << wxT('@') << host;
 337         }
 338     }
 339
 340     return email;
 341 }
 342
 343 wxString wxGetUserId()
 344 {
 345     static const int maxLoginLen = 256; // FIXME arbitrary number
 346
 347     wxString buf;
 348     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
 349     buf.UngetWriteBuf();
 350
 351     if ( !ok )
 352         buf.Empty();
 353
 354     return buf;
 355 }
 356
 357 wxString wxGetUserName()
 358 {
 359     static const int maxUserNameLen = 1024; // FIXME arbitrary number
 360
 361     wxString buf;
 362     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
 363     buf.UngetWriteBuf();
 364
 365     if ( !ok )
 366         buf.Empty();
 367
 368     return buf;
 369 }
 370
 371 wxString wxGetHostName()
 372 {
 373     static const size_t hostnameSize = 257;
 374
 375     wxString buf;
 376     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 377
 378     buf.UngetWriteBuf();
 379
 380     if ( !ok )
 381         buf.Empty();
 382
 383     return buf;
 384 }
 385
 386 wxString wxGetFullHostName()
 387 {
 388     static const size_t hostnameSize = 257;
 389
 390     wxString buf;
 391     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 392
 393     buf.UngetWriteBuf();
 394
 395     if ( !ok )
 396         buf.Empty();
 397
 398     return buf;
 399 }
 400
 401 wxString wxGetHomeDir()
 402 {
 403     wxString home;
 404     wxGetHomeDir(&home);
 405
 406     return home;
 407 }
 408
 409 #if 0
 410
 411 wxString wxGetCurrentDir()
 412 {
 413     wxString dir;
 414     size_t len = 1024;
 415     bool ok;
 416     do
 417     {
 418         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
 419         dir.UngetWriteBuf();
 420
 421         if ( !ok )
 422         {
 423             if ( errno != ERANGE )
 424             {
 425                 wxLogSysError(_T("Failed to get current directory"));
 426
 427                 return wxEmptyString;
 428             }
 429             else
 430             {
 431                 // buffer was too small, retry with a larger one
 432                 len *= 2;
 433             }
 434         }
 435         //else: ok
 436     } while ( !ok );
 437
 438     return dir;
 439 }
 440
 441 #endif // 0
 442
 443 // ----------------------------------------------------------------------------
 444 // wxExecute
 445 // ----------------------------------------------------------------------------
 446
 447 // wxDoExecuteWithCapture() helper: reads an entire stream into one array
 448 //
 449 // returns TRUE if ok, FALSE if error
 450 #if wxUSE_STREAMS
 451 static bool ReadAll(wxInputStream *is, wxArrayString& output)
 452 {
 453     wxCHECK_MSG( is, FALSE, _T("NULL stream in wxExecute()?") );
 454
 455     // the stream could be already at EOF or in wxSTREAM_BROKEN_PIPE state
 456     is->Reset();
 457
 458     wxTextInputStream tis(*is);
 459
 460     bool cont = TRUE;
 461     while ( cont )
 462     {
 463         wxString line = tis.ReadLine();
 464         if ( is->Eof() )
 465             break;
 466
 467         if ( !*is )
 468         {
 469             cont = FALSE;
 470         }
 471         else
 472         {
 473             output.Add(line);
 474         }
 475     }
 476
 477     return cont;
 478 }
 479 #endif // wxUSE_STREAMS
 480
 481 // this is a private function because it hasn't a clean interface: the first
 482 // array is passed by reference, the second by pointer - instead we have 2
 483 // public versions of wxExecute() below
 484 static long wxDoExecuteWithCapture(const wxString& command,
 485                                    wxArrayString& output,
 486                                    wxArrayString* error)
 487 {
 488     // create a wxProcess which will capture the output
 489     wxProcess *process = new wxProcess;
 490     process->Redirect();
 491
 492     long rc = wxExecute(command, wxEXEC_SYNC, process);
 493
 494 #if wxUSE_STREAMS
 495     if ( rc != -1 )
 496     {
 497         if ( !ReadAll(process->GetInputStream(), output) )
 498             rc = -1;
 499
 500         if ( error )
 501         {
 502             if ( !ReadAll(process->GetErrorStream(), *error) )
 503                 rc = -1;
 504         }
 505
 506     }
 507 #endif // wxUSE_STREAMS
 508
 509     delete process;
 510
 511     return rc;
 512 }
 513
 514 long wxExecute(const wxString& command, wxArrayString& output)
 515 {
 516     return wxDoExecuteWithCapture(command, output, NULL);
 517 }
 518
 519 long wxExecute(const wxString& command,
 520                wxArrayString& output,
 521                wxArrayString& error)
 522 {
 523     return wxDoExecuteWithCapture(command, output, &error);
 524 }
 525
 526 // ----------------------------------------------------------------------------
 527 // wxApp::Yield() wrappers for backwards compatibility
 528 // ----------------------------------------------------------------------------
 529
 530 bool wxYield()
 531 {
 532     return wxTheApp && wxTheApp->Yield();
 533 }
 534
 535 bool wxYieldIfNeeded()
 536 {
 537     return wxTheApp && wxTheApp->Yield(TRUE);
 538 }
 539
 540 #endif // wxUSE_BASE
 541
 542 // ============================================================================
 543 // GUI-only functions from now on
 544 // ============================================================================
 545
 546 #if wxUSE_GUI
 547
 548 #if wxUSE_MENUS
 549
 550 // ----------------------------------------------------------------------------
 551 // Menu accelerators related functions
 552 // ----------------------------------------------------------------------------
 553
 554 wxChar *wxStripMenuCodes(const wxChar *in, wxChar *out)
 555 {
 556     wxString s = wxMenuItem::GetLabelFromText(in);
 557     if ( out )
 558     {
 559         // go smash their buffer if it's not big enough - I love char * params
 560         memcpy(out, s.c_str(), s.length() * sizeof(wxChar));
 561     }
 562     else
 563     {
 564         // MYcopystring - for easier search...
 565         out = new wxChar[s.length() + 1];
 566         wxStrcpy(out, s.c_str());
 567     }
 568
 569     return out;
 570 }
 571
 572 wxString wxStripMenuCodes(const wxString& in)
 573 {
 574     wxString out;
 575
 576     size_t len = in.length();
 577     out.reserve(len);
 578
 579     for ( size_t n = 0; n < len; n++ )
 580     {
 581         wxChar ch = in[n];
 582         if ( ch == _T('&') )
 583         {
 584             // skip it, it is used to introduce the accel char (or to quote
 585             // itself in which case it should still be skipped): note that it
 586             // can't be the last character of the string
 587             if ( ++n == len )
 588             {
 589                 wxLogDebug(_T("Invalid menu string '%s'"), in.c_str());
 590             }
 591             else
 592             {
 593                 // use the next char instead
 594                 ch = in[n];
 595             }
 596         }
 597         else if ( ch == _T('\t') )
 598         {
 599             // everything after TAB is accel string, exit the loop
 600             break;
 601         }
 602
 603         out += ch;
 604     }
 605
 606     return out;
 607 }
 608
 609 #endif // wxUSE_MENUS
 610
 611 // ----------------------------------------------------------------------------
 612 // Window search functions
 613 // ----------------------------------------------------------------------------
 614
 615 /*
 616  * If parent is non-NULL, look through children for a label or title
 617  * matching the specified string. If NULL, look through all top-level windows.
 618  *
 619  */
 620
 621 wxWindow *
 622 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 623 {
 624     return wxWindow::FindWindowByLabel( title, parent );
 625 }
 626
 627
 628 /*
 629  * If parent is non-NULL, look through children for a name
 630  * matching the specified string. If NULL, look through all top-level windows.
 631  *
 632  */
 633
 634 wxWindow *
 635 wxFindWindowByName (const wxString& name, wxWindow * parent)
 636 {
 637     return wxWindow::FindWindowByName( name, parent );
 638 }
 639
 640 // Returns menu item id or -1 if none.
 641 int
 642 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 643 {
 644 #if wxUSE_MENUS
 645   wxMenuBar *menuBar = frame->GetMenuBar ();
 646   if ( menuBar )
 647       return menuBar->FindMenuItem (menuString, itemString);
 648 #endif // wxUSE_MENUS
 649
 650   return -1;
 651 }
 652
 653 // Try to find the deepest child that contains 'pt'.
 654 // We go backwards, to try to allow for controls that are spacially
 655 // within other controls, but are still siblings (e.g. buttons within
 656 // static boxes). Static boxes are likely to be created _before_ controls
 657 // that sit inside them.
 658 wxWindow* wxFindWindowAtPoint(wxWindow* win, const wxPoint& pt)
 659 {
 660     if (!win->IsShown())
 661         return NULL;
 662
 663     // Hack for wxNotebook case: at least in wxGTK, all pages
 664     // claim to be shown, so we must only deal with the selected one.
 665 #if wxUSE_NOTEBOOK
 666     if (win->IsKindOf(CLASSINFO(wxNotebook)))
 667     {
 668       wxNotebook* nb = (wxNotebook*) win;
 669       int sel = nb->GetSelection();
 670       if (sel >= 0)
 671       {
 672         wxWindow* child = nb->GetPage(sel);
 673         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 674         if (foundWin)
 675            return foundWin;
 676       }
 677     }
 678 #endif
 679
 680     wxWindowList::compatibility_iterator node = win->GetChildren().GetLast();
 681     while (node)
 682     {
 683         wxWindow* child = node->GetData();
 684         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 685         if (foundWin)
 686           return foundWin;
 687         node = node->GetPrevious();
 688     }
 689
 690     wxPoint pos = win->GetPosition();
 691     wxSize sz = win->GetSize();
 692     if (win->GetParent())
 693     {
 694         pos = win->GetParent()->ClientToScreen(pos);
 695     }
 696
 697     wxRect rect(pos, sz);
 698     if (rect.Inside(pt))
 699         return win;
 700     else
 701         return NULL;
 702 }
 703
 704 wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt)
 705 {
 706     // Go backwards through the list since windows
 707     // on top are likely to have been appended most
 708     // recently.
 709     wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetLast();
 710     while (node)
 711     {
 712         wxWindow* win = node->GetData();
 713         wxWindow* found = wxFindWindowAtPoint(win, pt);
 714         if (found)
 715             return found;
 716         node = node->GetPrevious();
 717     }
 718     return NULL;
 719 }
 720
 721 // ----------------------------------------------------------------------------
 722 // GUI helpers
 723 // ----------------------------------------------------------------------------
 724
 725 /*
 726  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 727  * since otherwise the generic code may be pulled in unnecessarily.
 728  */
 729
 730 #if wxUSE_MSGDLG
 731
 732 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 733                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 734 {
 735     wxMessageDialog dialog(parent, message, caption, style);
 736
 737     int ans = dialog.ShowModal();
 738     switch ( ans )
 739     {
 740         case wxID_OK:
 741             return wxOK;
 742         case wxID_YES:
 743             return wxYES;
 744         case wxID_NO:
 745             return wxNO;
 746         case wxID_CANCEL:
 747             return wxCANCEL;
 748     }
 749
 750     wxFAIL_MSG( _T("unexpected return code from wxMessageDialog") );
 751
 752     return wxCANCEL;
 753 }
 754
 755 #endif // wxUSE_MSGDLG
 756
 757 #if wxUSE_TEXTDLG
 758
 759 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 760                         const wxString& defaultValue, wxWindow *parent,
 761                         int x, int y, bool WXUNUSED(centre) )
 762 {
 763     wxString str;
 764     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 765     if (dialog.ShowModal() == wxID_OK)
 766     {
 767         str = dialog.GetValue();
 768     }
 769
 770     return str;
 771 }
 772
 773 wxString wxGetPasswordFromUser(const wxString& message,
 774                                const wxString& caption,
 775                                const wxString& defaultValue,
 776                                wxWindow *parent)
 777 {
 778     wxString str;
 779     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
 780                              wxOK | wxCANCEL | wxTE_PASSWORD);
 781     if ( dialog.ShowModal() == wxID_OK )
 782     {
 783         str = dialog.GetValue();
 784     }
 785
 786     return str;
 787 }
 788
 789 #endif // wxUSE_TEXTDLG
 790
 791 #if wxUSE_COLOURDLG
 792
 793 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
 794 {
 795     wxColourData data;
 796     data.SetChooseFull(TRUE);
 797     if ( colInit.Ok() )
 798     {
 799         data.SetColour((wxColour &)colInit); // const_cast
 800     }
 801
 802     wxColour colRet;
 803     wxColourDialog dialog(parent, &data);
 804     if ( dialog.ShowModal() == wxID_OK )
 805     {
 806         colRet = dialog.GetColourData().GetColour();
 807     }
 808     //else: leave it invalid
 809
 810     return colRet;
 811 }
 812
 813 #endif // wxUSE_COLOURDLG
 814
 815 #if wxUSE_FONTDLG
 816
 817 wxFont wxGetFontFromUser(wxWindow *parent, const wxFont& fontInit)
 818 {
 819     wxFontData data;
 820     if ( fontInit.Ok() )
 821     {
 822         data.SetInitialFont(fontInit);
 823     }
 824
 825     wxFont fontRet;
 826     wxFontDialog dialog(parent, data);
 827     if ( dialog.ShowModal() == wxID_OK )
 828     {
 829         fontRet = dialog.GetFontData().GetChosenFont();
 830     }
 831     //else: leave it invalid
 832
 833     return fontRet;
 834 }
 835
 836 #endif // wxUSE_FONTDLG
 837
 838 // ----------------------------------------------------------------------------
 839 // wxSafeYield and supporting functions
 840 // ----------------------------------------------------------------------------
 841
 842 void wxEnableTopLevelWindows(bool enable)
 843 {
 844     wxWindowList::compatibility_iterator node;
 845     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 846         node->GetData()->Enable(enable);
 847 }
 848
 849 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 850 {
 851     // remember the top level windows which were already disabled, so that we
 852     // don't reenable them later
 853     m_winDisabled = NULL;
 854
 855     wxWindowList::compatibility_iterator node;
 856     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 857     {
 858         wxWindow *winTop = node->GetData();
 859         if ( winTop == winToSkip )
 860             continue;
 861
 862         // we don't need to disable the hidden or already disabled windows
 863         if ( winTop->IsEnabled() && winTop->IsShown() )
 864         {
 865             winTop->Disable();
 866         }
 867         else
 868         {
 869             if ( !m_winDisabled )
 870             {
 871                 m_winDisabled = new wxWindowList;
 872             }
 873
 874             m_winDisabled->Append(winTop);
 875         }
 876     }
 877 }
 878
 879 wxWindowDisabler::~wxWindowDisabler()
 880 {
 881     wxWindowList::compatibility_iterator node;
 882     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 883     {
 884         wxWindow *winTop = node->GetData();
 885         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
 886         {
 887             winTop->Enable();
 888         }
 889         //else: had been already disabled, don't reenable
 890     }
 891
 892     delete m_winDisabled;
 893 }
 894
 895 // Yield to other apps/messages and disable user input to all windows except
 896 // the given one
 897 bool wxSafeYield(wxWindow *win, bool onlyIfNeeded)
 898 {
 899     wxWindowDisabler wd(win);
 900
 901     bool rc;
 902     if (onlyIfNeeded)
 903         rc = wxYieldIfNeeded();
 904     else
 905         rc = wxYield();
 906
 907     return rc;
 908 }
 909
 910 // Don't synthesize KeyUp events holding down a key and producing KeyDown
 911 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
 912 // in utilsgtk.cpp.
 913 #ifndef __WXGTK__
 914 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
 915 {
 916     return TRUE;    // detectable auto-repeat is the only mode MSW supports
 917 }
 918 #endif // !wxGTK
 919
 920 #endif // wxUSE_GUI
 921