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 #if defined(__WXWINCE__) && wxUSE_DATETIME
  58 #include "wx/datetime.h"
  59 #endif
  60
  61 #include <ctype.h>
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65
  66 #if !defined(__WATCOMC__)
  67     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  68         #include <errno.h>
  69     #endif
  70 #endif
  71
  72 #if wxUSE_GUI
  73     #include "wx/colordlg.h"
  74     #include "wx/fontdlg.h"
  75     #include "wx/notebook.h"
  76     #include "wx/frame.h"
  77     #include "wx/statusbr.h"
  78 #endif // wxUSE_GUI
  79
  80 #ifndef __WXWINCE__
  81 #include <time.h>
  82 #else
  83 #include "wx/msw/wince/time.h"
  84 #endif
  85
  86 #if !defined(__MWERKS__) && !defined(__WXWINCE__)
  87     #include <sys/types.h>
  88     #include <sys/stat.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 #ifdef __WXWINCE__
 267 #if wxUSE_DATETIME
 268     wxDateTime now = wxDateTime::Now();
 269     return now.Format();
 270 #else
 271     return wxEmptyString;
 272 #endif
 273 #else
 274     time_t now = time((time_t *) NULL);
 275     char *date = ctime(&now);
 276     date[24] = '\0';
 277     return wxString::FromAscii(date);
 278 #endif
 279 }
 280
 281 const wxChar *wxGetInstallPrefix()
 282 {
 283     wxString prefix;
 284
 285     if ( wxGetEnv(wxT("WXPREFIX"), &prefix) )
 286         return prefix.c_str();
 287
 288 #ifdef wxINSTALL_PREFIX
 289     return wxT(wxINSTALL_PREFIX);
 290 #else
 291     return wxT("");
 292 #endif
 293 }
 294
 295 wxString wxGetDataDir()
 296 {
 297     wxString format = wxGetInstallPrefix();
 298     format <<  wxFILE_SEP_PATH
 299            << wxT("share") << wxFILE_SEP_PATH
 300            << wxT("wx") << wxFILE_SEP_PATH
 301            << wxT("%i.%i");
 302     wxString dir;
 303     dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
 304     return dir;
 305 }
 306
 307 int wxGetOsVersion(int *verMaj, int *verMin)
 308 {
 309     // we want this function to work even if there is no wxApp
 310     wxConsoleAppTraits traitsConsole;
 311     wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
 312     if ( ! traits )
 313         traits = &traitsConsole;
 314
 315     return traits->GetOSVersion(verMaj, verMin);
 316 }
 317
 318 // ----------------------------------------------------------------------------
 319 // network and user id functions
 320 // ----------------------------------------------------------------------------
 321
 322 // Get Full RFC822 style email address
 323 bool wxGetEmailAddress(wxChar *address, int maxSize)
 324 {
 325     wxString email = wxGetEmailAddress();
 326     if ( !email )
 327         return FALSE;
 328
 329     wxStrncpy(address, email, maxSize - 1);
 330     address[maxSize - 1] = wxT('\0');
 331
 332     return TRUE;
 333 }
 334
 335 wxString wxGetEmailAddress()
 336 {
 337     wxString email;
 338
 339     wxString host = wxGetFullHostName();
 340     if ( !!host )
 341     {
 342         wxString user = wxGetUserId();
 343         if ( !!user )
 344         {
 345             email << user << wxT('@') << host;
 346         }
 347     }
 348
 349     return email;
 350 }
 351
 352 wxString wxGetUserId()
 353 {
 354     static const int maxLoginLen = 256; // FIXME arbitrary number
 355
 356     wxString buf;
 357     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
 358     buf.UngetWriteBuf();
 359
 360     if ( !ok )
 361         buf.Empty();
 362
 363     return buf;
 364 }
 365
 366 wxString wxGetUserName()
 367 {
 368     static const int maxUserNameLen = 1024; // FIXME arbitrary number
 369
 370     wxString buf;
 371     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
 372     buf.UngetWriteBuf();
 373
 374     if ( !ok )
 375         buf.Empty();
 376
 377     return buf;
 378 }
 379
 380 wxString wxGetHostName()
 381 {
 382     static const size_t hostnameSize = 257;
 383
 384     wxString buf;
 385     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 386
 387     buf.UngetWriteBuf();
 388
 389     if ( !ok )
 390         buf.Empty();
 391
 392     return buf;
 393 }
 394
 395 wxString wxGetFullHostName()
 396 {
 397     static const size_t hostnameSize = 257;
 398
 399     wxString buf;
 400     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 401
 402     buf.UngetWriteBuf();
 403
 404     if ( !ok )
 405         buf.Empty();
 406
 407     return buf;
 408 }
 409
 410 wxString wxGetHomeDir()
 411 {
 412     wxString home;
 413     wxGetHomeDir(&home);
 414
 415     return home;
 416 }
 417
 418 #if 0
 419
 420 wxString wxGetCurrentDir()
 421 {
 422     wxString dir;
 423     size_t len = 1024;
 424     bool ok;
 425     do
 426     {
 427         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
 428         dir.UngetWriteBuf();
 429
 430         if ( !ok )
 431         {
 432             if ( errno != ERANGE )
 433             {
 434                 wxLogSysError(_T("Failed to get current directory"));
 435
 436                 return wxEmptyString;
 437             }
 438             else
 439             {
 440                 // buffer was too small, retry with a larger one
 441                 len *= 2;
 442             }
 443         }
 444         //else: ok
 445     } while ( !ok );
 446
 447     return dir;
 448 }
 449
 450 #endif // 0
 451
 452 // ----------------------------------------------------------------------------
 453 // wxExecute
 454 // ----------------------------------------------------------------------------
 455
 456 // wxDoExecuteWithCapture() helper: reads an entire stream into one array
 457 //
 458 // returns TRUE if ok, FALSE if error
 459 #if wxUSE_STREAMS
 460 static bool ReadAll(wxInputStream *is, wxArrayString& output)
 461 {
 462     wxCHECK_MSG( is, FALSE, _T("NULL stream in wxExecute()?") );
 463
 464     // the stream could be already at EOF or in wxSTREAM_BROKEN_PIPE state
 465     is->Reset();
 466
 467     wxTextInputStream tis(*is);
 468
 469     bool cont = TRUE;
 470     while ( cont )
 471     {
 472         wxString line = tis.ReadLine();
 473         if ( is->Eof() )
 474             break;
 475
 476         if ( !*is )
 477         {
 478             cont = FALSE;
 479         }
 480         else
 481         {
 482             output.Add(line);
 483         }
 484     }
 485
 486     return cont;
 487 }
 488 #endif // wxUSE_STREAMS
 489
 490 // this is a private function because it hasn't a clean interface: the first
 491 // array is passed by reference, the second by pointer - instead we have 2
 492 // public versions of wxExecute() below
 493 static long wxDoExecuteWithCapture(const wxString& command,
 494                                    wxArrayString& output,
 495                                    wxArrayString* error)
 496 {
 497     // create a wxProcess which will capture the output
 498     wxProcess *process = new wxProcess;
 499     process->Redirect();
 500
 501     long rc = wxExecute(command, wxEXEC_SYNC, process);
 502
 503 #if wxUSE_STREAMS
 504     if ( rc != -1 )
 505     {
 506         if ( !ReadAll(process->GetInputStream(), output) )
 507             rc = -1;
 508
 509         if ( error )
 510         {
 511             if ( !ReadAll(process->GetErrorStream(), *error) )
 512                 rc = -1;
 513         }
 514
 515     }
 516 #endif // wxUSE_STREAMS
 517
 518     delete process;
 519
 520     return rc;
 521 }
 522
 523 long wxExecute(const wxString& command, wxArrayString& output)
 524 {
 525     return wxDoExecuteWithCapture(command, output, NULL);
 526 }
 527
 528 long wxExecute(const wxString& command,
 529                wxArrayString& output,
 530                wxArrayString& error)
 531 {
 532     return wxDoExecuteWithCapture(command, output, &error);
 533 }
 534
 535 // ----------------------------------------------------------------------------
 536 // wxApp::Yield() wrappers for backwards compatibility
 537 // ----------------------------------------------------------------------------
 538
 539 bool wxYield()
 540 {
 541     return wxTheApp && wxTheApp->Yield();
 542 }
 543
 544 bool wxYieldIfNeeded()
 545 {
 546     return wxTheApp && wxTheApp->Yield(TRUE);
 547 }
 548
 549 #endif // wxUSE_BASE
 550
 551 // ============================================================================
 552 // GUI-only functions from now on
 553 // ============================================================================
 554
 555 #if wxUSE_GUI
 556
 557 #if wxUSE_MENUS
 558
 559 // ----------------------------------------------------------------------------
 560 // Menu accelerators related functions
 561 // ----------------------------------------------------------------------------
 562
 563 wxChar *wxStripMenuCodes(const wxChar *in, wxChar *out)
 564 {
 565     wxString s = wxMenuItem::GetLabelFromText(in);
 566     if ( out )
 567     {
 568         // go smash their buffer if it's not big enough - I love char * params
 569         memcpy(out, s.c_str(), s.length() * sizeof(wxChar));
 570     }
 571     else
 572     {
 573         // MYcopystring - for easier search...
 574         out = new wxChar[s.length() + 1];
 575         wxStrcpy(out, s.c_str());
 576     }
 577
 578     return out;
 579 }
 580
 581 wxString wxStripMenuCodes(const wxString& in)
 582 {
 583     wxString out;
 584
 585     size_t len = in.length();
 586     out.reserve(len);
 587
 588     for ( size_t n = 0; n < len; n++ )
 589     {
 590         wxChar ch = in[n];
 591         if ( ch == _T('&') )
 592         {
 593             // skip it, it is used to introduce the accel char (or to quote
 594             // itself in which case it should still be skipped): note that it
 595             // can't be the last character of the string
 596             if ( ++n == len )
 597             {
 598                 wxLogDebug(_T("Invalid menu string '%s'"), in.c_str());
 599             }
 600             else
 601             {
 602                 // use the next char instead
 603                 ch = in[n];
 604             }
 605         }
 606         else if ( ch == _T('\t') )
 607         {
 608             // everything after TAB is accel string, exit the loop
 609             break;
 610         }
 611
 612         out += ch;
 613     }
 614
 615     return out;
 616 }
 617
 618 #endif // wxUSE_MENUS
 619
 620 // ----------------------------------------------------------------------------
 621 // Window search functions
 622 // ----------------------------------------------------------------------------
 623
 624 /*
 625  * If parent is non-NULL, look through children for a label or title
 626  * matching the specified string. If NULL, look through all top-level windows.
 627  *
 628  */
 629
 630 wxWindow *
 631 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 632 {
 633     return wxWindow::FindWindowByLabel( title, parent );
 634 }
 635
 636
 637 /*
 638  * If parent is non-NULL, look through children for a name
 639  * matching the specified string. If NULL, look through all top-level windows.
 640  *
 641  */
 642
 643 wxWindow *
 644 wxFindWindowByName (const wxString& name, wxWindow * parent)
 645 {
 646     return wxWindow::FindWindowByName( name, parent );
 647 }
 648
 649 // Returns menu item id or -1 if none.
 650 int
 651 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 652 {
 653 #if wxUSE_MENUS
 654   wxMenuBar *menuBar = frame->GetMenuBar ();
 655   if ( menuBar )
 656       return menuBar->FindMenuItem (menuString, itemString);
 657 #endif // wxUSE_MENUS
 658
 659   return -1;
 660 }
 661
 662 // Try to find the deepest child that contains 'pt'.
 663 // We go backwards, to try to allow for controls that are spacially
 664 // within other controls, but are still siblings (e.g. buttons within
 665 // static boxes). Static boxes are likely to be created _before_ controls
 666 // that sit inside them.
 667 wxWindow* wxFindWindowAtPoint(wxWindow* win, const wxPoint& pt)
 668 {
 669     if (!win->IsShown())
 670         return NULL;
 671
 672     // Hack for wxNotebook case: at least in wxGTK, all pages
 673     // claim to be shown, so we must only deal with the selected one.
 674 #if wxUSE_NOTEBOOK
 675     if (win->IsKindOf(CLASSINFO(wxNotebook)))
 676     {
 677       wxNotebook* nb = (wxNotebook*) win;
 678       int sel = nb->GetSelection();
 679       if (sel >= 0)
 680       {
 681         wxWindow* child = nb->GetPage(sel);
 682         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 683         if (foundWin)
 684            return foundWin;
 685       }
 686     }
 687 #endif
 688
 689     wxWindowList::compatibility_iterator node = win->GetChildren().GetLast();
 690     while (node)
 691     {
 692         wxWindow* child = node->GetData();
 693         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 694         if (foundWin)
 695           return foundWin;
 696         node = node->GetPrevious();
 697     }
 698
 699     wxPoint pos = win->GetPosition();
 700     wxSize sz = win->GetSize();
 701     if (win->GetParent())
 702     {
 703         pos = win->GetParent()->ClientToScreen(pos);
 704     }
 705
 706     wxRect rect(pos, sz);
 707     if (rect.Inside(pt))
 708         return win;
 709     else
 710         return NULL;
 711 }
 712
 713 wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt)
 714 {
 715     // Go backwards through the list since windows
 716     // on top are likely to have been appended most
 717     // recently.
 718     wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetLast();
 719     while (node)
 720     {
 721         wxWindow* win = node->GetData();
 722         wxWindow* found = wxFindWindowAtPoint(win, pt);
 723         if (found)
 724             return found;
 725         node = node->GetPrevious();
 726     }
 727     return NULL;
 728 }
 729
 730 // ----------------------------------------------------------------------------
 731 // GUI helpers
 732 // ----------------------------------------------------------------------------
 733
 734 /*
 735  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 736  * since otherwise the generic code may be pulled in unnecessarily.
 737  */
 738
 739 #if wxUSE_MSGDLG
 740
 741 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 742                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 743 {
 744     wxMessageDialog dialog(parent, message, caption, style);
 745
 746     int ans = dialog.ShowModal();
 747     switch ( ans )
 748     {
 749         case wxID_OK:
 750             return wxOK;
 751         case wxID_YES:
 752             return wxYES;
 753         case wxID_NO:
 754             return wxNO;
 755         case wxID_CANCEL:
 756             return wxCANCEL;
 757     }
 758
 759     wxFAIL_MSG( _T("unexpected return code from wxMessageDialog") );
 760
 761     return wxCANCEL;
 762 }
 763
 764 #endif // wxUSE_MSGDLG
 765
 766 #if wxUSE_TEXTDLG
 767
 768 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 769                         const wxString& defaultValue, wxWindow *parent,
 770                         int x, int y, bool WXUNUSED(centre) )
 771 {
 772     wxString str;
 773     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 774     if (dialog.ShowModal() == wxID_OK)
 775     {
 776         str = dialog.GetValue();
 777     }
 778
 779     return str;
 780 }
 781
 782 wxString wxGetPasswordFromUser(const wxString& message,
 783                                const wxString& caption,
 784                                const wxString& defaultValue,
 785                                wxWindow *parent)
 786 {
 787     wxString str;
 788     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
 789                              wxOK | wxCANCEL | wxTE_PASSWORD);
 790     if ( dialog.ShowModal() == wxID_OK )
 791     {
 792         str = dialog.GetValue();
 793     }
 794
 795     return str;
 796 }
 797
 798 #endif // wxUSE_TEXTDLG
 799
 800 #if wxUSE_COLOURDLG
 801
 802 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
 803 {
 804     wxColourData data;
 805     data.SetChooseFull(TRUE);
 806     if ( colInit.Ok() )
 807     {
 808         data.SetColour((wxColour &)colInit); // const_cast
 809     }
 810
 811     wxColour colRet;
 812     wxColourDialog dialog(parent, &data);
 813     if ( dialog.ShowModal() == wxID_OK )
 814     {
 815         colRet = dialog.GetColourData().GetColour();
 816     }
 817     //else: leave it invalid
 818
 819     return colRet;
 820 }
 821
 822 #endif // wxUSE_COLOURDLG
 823
 824 #if wxUSE_FONTDLG
 825
 826 wxFont wxGetFontFromUser(wxWindow *parent, const wxFont& fontInit)
 827 {
 828     wxFontData data;
 829     if ( fontInit.Ok() )
 830     {
 831         data.SetInitialFont(fontInit);
 832     }
 833
 834     wxFont fontRet;
 835     wxFontDialog dialog(parent, data);
 836     if ( dialog.ShowModal() == wxID_OK )
 837     {
 838         fontRet = dialog.GetFontData().GetChosenFont();
 839     }
 840     //else: leave it invalid
 841
 842     return fontRet;
 843 }
 844
 845 #endif // wxUSE_FONTDLG
 846
 847 // ----------------------------------------------------------------------------
 848 // wxSafeYield and supporting functions
 849 // ----------------------------------------------------------------------------
 850
 851 void wxEnableTopLevelWindows(bool enable)
 852 {
 853     wxWindowList::compatibility_iterator node;
 854     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 855         node->GetData()->Enable(enable);
 856 }
 857
 858 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 859 {
 860     // remember the top level windows which were already disabled, so that we
 861     // don't reenable them later
 862     m_winDisabled = NULL;
 863
 864     wxWindowList::compatibility_iterator node;
 865     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 866     {
 867         wxWindow *winTop = node->GetData();
 868         if ( winTop == winToSkip )
 869             continue;
 870
 871         // we don't need to disable the hidden or already disabled windows
 872         if ( winTop->IsEnabled() && winTop->IsShown() )
 873         {
 874             winTop->Disable();
 875         }
 876         else
 877         {
 878             if ( !m_winDisabled )
 879             {
 880                 m_winDisabled = new wxWindowList;
 881             }
 882
 883             m_winDisabled->Append(winTop);
 884         }
 885     }
 886 }
 887
 888 wxWindowDisabler::~wxWindowDisabler()
 889 {
 890     wxWindowList::compatibility_iterator node;
 891     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 892     {
 893         wxWindow *winTop = node->GetData();
 894         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
 895         {
 896             winTop->Enable();
 897         }
 898         //else: had been already disabled, don't reenable
 899     }
 900
 901     delete m_winDisabled;
 902 }
 903
 904 // Yield to other apps/messages and disable user input to all windows except
 905 // the given one
 906 bool wxSafeYield(wxWindow *win, bool onlyIfNeeded)
 907 {
 908     wxWindowDisabler wd(win);
 909
 910     bool rc;
 911     if (onlyIfNeeded)
 912         rc = wxYieldIfNeeded();
 913     else
 914         rc = wxYield();
 915
 916     return rc;
 917 }
 918
 919 // Don't synthesize KeyUp events holding down a key and producing KeyDown
 920 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
 921 // in utilsgtk.cpp.
 922 #ifndef __WXGTK__
 923 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
 924 {
 925     return TRUE;    // detectable auto-repeat is the only mode MSW supports
 926 }
 927 #endif // !wxGTK
 928
 929 #endif // wxUSE_GUI
 930