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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) && !defined(__EMX__)
  21 // Some older compilers (such as EMX) cannot handle
  22 // #pragma interface/implementation correctly, iff
  23 // #pragma implementation is used in _two_ translation
  24 // units (as created by e.g. event.cpp compiled for
  25 // libwx_base and event.cpp compiled for libwx_gui_core).
  26 // So we must not use those pragmas for those compilers in
  27 // such files.
  28     #pragma implementation "utils.h"
  29 #endif
  30
  31 // For compilers that support precompilation, includes "wx.h".
  32 #include "wx/wxprec.h"
  33
  34 #ifdef __BORLANDC__
  35     #pragma hdrstop
  36 #endif
  37
  38 #ifndef WX_PRECOMP
  39     #include "wx/app.h"
  40     #include "wx/string.h"
  41     #include "wx/utils.h"
  42     #include "wx/intl.h"
  43     #include "wx/log.h"
  44
  45     #if wxUSE_GUI
  46         #include "wx/window.h"
  47         #include "wx/frame.h"
  48         #include "wx/menu.h"
  49         #include "wx/msgdlg.h"
  50         #include "wx/textdlg.h"
  51         #include "wx/textctrl.h"    // for wxTE_PASSWORD
  52         #if wxUSE_ACCEL
  53             #include "wx/menuitem.h"
  54             #include "wx/accel.h"
  55         #endif // wxUSE_ACCEL
  56     #endif // wxUSE_GUI
  57 #endif // WX_PRECOMP
  58
  59 #include "wx/apptrait.h"
  60
  61 #include "wx/process.h"
  62 #include "wx/txtstrm.h"
  63
  64 #if defined(__WXWINCE__) && wxUSE_DATETIME
  65 #include "wx/datetime.h"
  66 #endif
  67
  68 #include <ctype.h>
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71 #include <string.h>
  72
  73 #if !defined(__WATCOMC__)
  74     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  75         #include <errno.h>
  76     #endif
  77 #endif
  78
  79 #if wxUSE_GUI
  80     #include "wx/colordlg.h"
  81     #include "wx/fontdlg.h"
  82     #include "wx/notebook.h"
  83     #include "wx/frame.h"
  84     #include "wx/statusbr.h"
  85 #endif // wxUSE_GUI
  86
  87 #ifndef __WXWINCE__
  88 #include <time.h>
  89 #else
  90 #include "wx/msw/wince/time.h"
  91 #endif
  92
  93 #if !defined(__MWERKS__) && !defined(__WXWINCE__)
  94     #include <sys/types.h>
  95     #include <sys/stat.h>
  96 #endif
  97
  98 #ifdef __WXMSW__
  99     #include "wx/msw/private.h"
 100 #endif
 101
 102 #if wxUSE_BASE
 103
 104 // ----------------------------------------------------------------------------
 105 // common data
 106 // ----------------------------------------------------------------------------
 107
 108 #if WXWIN_COMPATIBILITY_2_2
 109     const wxChar *wxInternalErrorStr = wxT("wxWidgets Internal Error");
 110     const wxChar *wxFatalErrorStr = wxT("wxWidgets Fatal Error");
 111 #endif // WXWIN_COMPATIBILITY_2_2
 112
 113 // ============================================================================
 114 // implementation
 115 // ============================================================================
 116
 117 #if WXWIN_COMPATIBILITY_2_4
 118
 119 wxChar *
 120 copystring (const wxChar *s)
 121 {
 122   if (s == NULL) s = wxT("");
 123   size_t len = wxStrlen (s) + 1;
 124
 125   wxChar *news = new wxChar[len];
 126   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 127
 128   return news;
 129 }
 130
 131 #endif // WXWIN_COMPATIBILITY_2_4
 132
 133 // ----------------------------------------------------------------------------
 134 // String <-> Number conversions (deprecated)
 135 // ----------------------------------------------------------------------------
 136
 137 #if WXWIN_COMPATIBILITY_2_4
 138
 139 WXDLLIMPEXP_DATA_BASE(const wxChar *) wxFloatToStringStr = wxT("%.2f");
 140 WXDLLIMPEXP_DATA_BASE(const wxChar *) wxDoubleToStringStr = wxT("%.2f");
 141
 142 void
 143 StringToFloat (const wxChar *s, float *number)
 144 {
 145   if (s && *s && number)
 146     *number = (float) wxStrtod (s, (wxChar **) NULL);
 147 }
 148
 149 void
 150 StringToDouble (const wxChar *s, double *number)
 151 {
 152   if (s && *s && number)
 153     *number = wxStrtod (s, (wxChar **) NULL);
 154 }
 155
 156 wxChar *
 157 FloatToString (float number, const wxChar *fmt)
 158 {
 159   static wxChar buf[256];
 160
 161   wxSprintf (buf, fmt, number);
 162   return buf;
 163 }
 164
 165 wxChar *
 166 DoubleToString (double number, const wxChar *fmt)
 167 {
 168   static wxChar buf[256];
 169
 170   wxSprintf (buf, fmt, number);
 171   return buf;
 172 }
 173
 174 void
 175 StringToInt (const wxChar *s, int *number)
 176 {
 177   if (s && *s && number)
 178     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 179 }
 180
 181 void
 182 StringToLong (const wxChar *s, long *number)
 183 {
 184   if (s && *s && number)
 185     *number = wxStrtol (s, (wxChar **) NULL, 10);
 186 }
 187
 188 wxChar *
 189 IntToString (int number)
 190 {
 191   static wxChar buf[20];
 192
 193   wxSprintf (buf, wxT("%d"), number);
 194   return buf;
 195 }
 196
 197 wxChar *
 198 LongToString (long number)
 199 {
 200   static wxChar buf[20];
 201
 202   wxSprintf (buf, wxT("%ld"), number);
 203   return buf;
 204 }
 205
 206 #endif // WXWIN_COMPATIBILITY_2_4
 207
 208 // Array used in DecToHex conversion routine.
 209 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 210
 211 // Convert 2-digit hex number to decimal
 212 int wxHexToDec(const wxString& buf)
 213 {
 214   int firstDigit, secondDigit;
 215
 216   if (buf.GetChar(0) >= wxT('A'))
 217     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 218   else
 219     firstDigit = buf.GetChar(0) - wxT('0');
 220
 221   if (buf.GetChar(1) >= wxT('A'))
 222     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 223   else
 224     secondDigit = buf.GetChar(1) - wxT('0');
 225
 226   return (firstDigit & 0xF) * 16 + (secondDigit & 0xF );
 227 }
 228
 229 // Convert decimal integer to 2-character hex string
 230 void wxDecToHex(int dec, wxChar *buf)
 231 {
 232   int firstDigit = (int)(dec/16.0);
 233   int secondDigit = (int)(dec - (firstDigit*16.0));
 234   buf[0] = hexArray[firstDigit];
 235   buf[1] = hexArray[secondDigit];
 236   buf[2] = 0;
 237 }
 238
 239 // Convert decimal integer to 2-character hex string
 240 wxString wxDecToHex(int dec)
 241 {
 242     wxChar buf[3];
 243     wxDecToHex(dec, buf);
 244     return wxString(buf);
 245 }
 246
 247 // ----------------------------------------------------------------------------
 248 // misc functions
 249 // ----------------------------------------------------------------------------
 250
 251 // Return the current date/time
 252 wxString wxNow()
 253 {
 254 #ifdef __WXWINCE__
 255 #if wxUSE_DATETIME
 256     wxDateTime now = wxDateTime::Now();
 257     return now.Format();
 258 #else
 259     return wxEmptyString;
 260 #endif
 261 #else
 262     time_t now = time((time_t *) NULL);
 263     char *date = ctime(&now);
 264     date[24] = '\0';
 265     return wxString::FromAscii(date);
 266 #endif
 267 }
 268
 269 const wxChar *wxGetInstallPrefix()
 270 {
 271     wxString prefix;
 272
 273     if ( wxGetEnv(wxT("WXPREFIX"), &prefix) )
 274         return prefix.c_str();
 275
 276 #ifdef wxINSTALL_PREFIX
 277     return wxT(wxINSTALL_PREFIX);
 278 #else
 279     return wxT("");
 280 #endif
 281 }
 282
 283 wxString wxGetDataDir()
 284 {
 285     wxString format = wxGetInstallPrefix();
 286     format <<  wxFILE_SEP_PATH
 287            << wxT("share") << wxFILE_SEP_PATH
 288            << wxT("wx") << wxFILE_SEP_PATH
 289            << wxT("%i.%i");
 290     wxString dir;
 291     dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
 292     return dir;
 293 }
 294
 295 int wxGetOsVersion(int *verMaj, int *verMin)
 296 {
 297     // we want this function to work even if there is no wxApp
 298     wxConsoleAppTraits traitsConsole;
 299     wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
 300     if ( ! traits )
 301         traits = &traitsConsole;
 302
 303     wxToolkitInfo& info = traits->GetToolkitInfo();
 304     if ( verMaj )
 305         *verMaj = info.versionMajor;
 306     if ( verMin )
 307         *verMin = info.versionMinor;
 308     return info.os;
 309 }
 310
 311 // ----------------------------------------------------------------------------
 312 // network and user id functions
 313 // ----------------------------------------------------------------------------
 314
 315 // Get Full RFC822 style email address
 316 bool wxGetEmailAddress(wxChar *address, int maxSize)
 317 {
 318     wxString email = wxGetEmailAddress();
 319     if ( !email )
 320         return FALSE;
 321
 322     wxStrncpy(address, email, maxSize - 1);
 323     address[maxSize - 1] = wxT('\0');
 324
 325     return TRUE;
 326 }
 327
 328 wxString wxGetEmailAddress()
 329 {
 330     wxString email;
 331
 332     wxString host = wxGetFullHostName();
 333     if ( !!host )
 334     {
 335         wxString user = wxGetUserId();
 336         if ( !!user )
 337         {
 338             email << user << wxT('@') << host;
 339         }
 340     }
 341
 342     return email;
 343 }
 344
 345 wxString wxGetUserId()
 346 {
 347     static const int maxLoginLen = 256; // FIXME arbitrary number
 348
 349     wxString buf;
 350     bool ok = wxGetUserId(wxStringBuffer(buf, maxLoginLen), maxLoginLen);
 351
 352     if ( !ok )
 353         buf.Empty();
 354
 355     return buf;
 356 }
 357
 358 wxString wxGetUserName()
 359 {
 360     static const int maxUserNameLen = 1024; // FIXME arbitrary number
 361
 362     wxString buf;
 363     bool ok = wxGetUserName(wxStringBuffer(buf, maxUserNameLen), maxUserNameLen);
 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(wxStringBuffer(buf, hostnameSize), hostnameSize);
 377
 378     if ( !ok )
 379         buf.Empty();
 380
 381     return buf;
 382 }
 383
 384 wxString wxGetFullHostName()
 385 {
 386     static const size_t hostnameSize = 257;
 387
 388     wxString buf;
 389     bool ok = wxGetFullHostName(wxStringBuffer(buf, hostnameSize), hostnameSize);
 390
 391     if ( !ok )
 392         buf.Empty();
 393
 394     return buf;
 395 }
 396
 397 wxString wxGetHomeDir()
 398 {
 399     wxString home;
 400     wxGetHomeDir(&home);
 401
 402     return home;
 403 }
 404
 405 #if 0
 406
 407 wxString wxGetCurrentDir()
 408 {
 409     wxString dir;
 410     size_t len = 1024;
 411     bool ok;
 412     do
 413     {
 414         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
 415         dir.UngetWriteBuf();
 416
 417         if ( !ok )
 418         {
 419             if ( errno != ERANGE )
 420             {
 421                 wxLogSysError(_T("Failed to get current directory"));
 422
 423                 return wxEmptyString;
 424             }
 425             else
 426             {
 427                 // buffer was too small, retry with a larger one
 428                 len *= 2;
 429             }
 430         }
 431         //else: ok
 432     } while ( !ok );
 433
 434     return dir;
 435 }
 436
 437 #endif // 0
 438
 439 // ----------------------------------------------------------------------------
 440 // wxExecute
 441 // ----------------------------------------------------------------------------
 442
 443 // wxDoExecuteWithCapture() helper: reads an entire stream into one array
 444 //
 445 // returns TRUE if ok, FALSE if error
 446 #if wxUSE_STREAMS
 447 static bool ReadAll(wxInputStream *is, wxArrayString& output)
 448 {
 449     wxCHECK_MSG( is, FALSE, _T("NULL stream in wxExecute()?") );
 450
 451     // the stream could be already at EOF or in wxSTREAM_BROKEN_PIPE state
 452     is->Reset();
 453
 454     wxTextInputStream tis(*is);
 455
 456     bool cont = TRUE;
 457     while ( cont )
 458     {
 459         wxString line = tis.ReadLine();
 460         if ( is->Eof() )
 461             break;
 462
 463         if ( !*is )
 464         {
 465             cont = FALSE;
 466         }
 467         else
 468         {
 469             output.Add(line);
 470         }
 471     }
 472
 473     return cont;
 474 }
 475 #endif // wxUSE_STREAMS
 476
 477 // this is a private function because it hasn't a clean interface: the first
 478 // array is passed by reference, the second by pointer - instead we have 2
 479 // public versions of wxExecute() below
 480 static long wxDoExecuteWithCapture(const wxString& command,
 481                                    wxArrayString& output,
 482                                    wxArrayString* error)
 483 {
 484     // create a wxProcess which will capture the output
 485     wxProcess *process = new wxProcess;
 486     process->Redirect();
 487
 488     long rc = wxExecute(command, wxEXEC_SYNC, process);
 489
 490 #if wxUSE_STREAMS
 491     if ( rc != -1 )
 492     {
 493         if ( !ReadAll(process->GetInputStream(), output) )
 494             rc = -1;
 495
 496         if ( error )
 497         {
 498             if ( !ReadAll(process->GetErrorStream(), *error) )
 499                 rc = -1;
 500         }
 501
 502     }
 503 #endif // wxUSE_STREAMS
 504
 505     delete process;
 506
 507     return rc;
 508 }
 509
 510 long wxExecute(const wxString& command, wxArrayString& output)
 511 {
 512     return wxDoExecuteWithCapture(command, output, NULL);
 513 }
 514
 515 long wxExecute(const wxString& command,
 516                wxArrayString& output,
 517                wxArrayString& error)
 518 {
 519     return wxDoExecuteWithCapture(command, output, &error);
 520 }
 521
 522 // ----------------------------------------------------------------------------
 523 // wxApp::Yield() wrappers for backwards compatibility
 524 // ----------------------------------------------------------------------------
 525
 526 bool wxYield()
 527 {
 528     return wxTheApp && wxTheApp->Yield();
 529 }
 530
 531 bool wxYieldIfNeeded()
 532 {
 533     return wxTheApp && wxTheApp->Yield(TRUE);
 534 }
 535
 536 #endif // wxUSE_BASE
 537
 538 // ============================================================================
 539 // GUI-only functions from now on
 540 // ============================================================================
 541
 542 #if wxUSE_GUI
 543
 544 // Id generation
 545 static long wxCurrentId = 100;
 546
 547 long
 548 wxNewId (void)
 549 {
 550   return wxCurrentId++;
 551 }
 552
 553 long
 554 wxGetCurrentId(void) { return wxCurrentId; }
 555
 556 void
 557 wxRegisterId (long id)
 558 {
 559   if (id >= wxCurrentId)
 560     wxCurrentId = id + 1;
 561 }
 562
 563 #if wxUSE_MENUS
 564
 565 // ----------------------------------------------------------------------------
 566 // Menu accelerators related functions
 567 // ----------------------------------------------------------------------------
 568
 569 wxChar *wxStripMenuCodes(const wxChar *in, wxChar *out)
 570 {
 571     wxString s = wxMenuItem::GetLabelFromText(in);
 572     if ( out )
 573     {
 574         // go smash their buffer if it's not big enough - I love char * params
 575         memcpy(out, s.c_str(), s.length() * sizeof(wxChar));
 576     }
 577     else
 578     {
 579         // MYcopystring - for easier search...
 580         out = new wxChar[s.length() + 1];
 581         wxStrcpy(out, s.c_str());
 582     }
 583
 584     return out;
 585 }
 586
 587 wxString wxStripMenuCodes(const wxString& in)
 588 {
 589     wxString out;
 590
 591     size_t len = in.length();
 592     out.reserve(len);
 593
 594     for ( size_t n = 0; n < len; n++ )
 595     {
 596         wxChar ch = in[n];
 597         if ( ch == _T('&') )
 598         {
 599             // skip it, it is used to introduce the accel char (or to quote
 600             // itself in which case it should still be skipped): note that it
 601             // can't be the last character of the string
 602             if ( ++n == len )
 603             {
 604                 wxLogDebug(_T("Invalid menu string '%s'"), in.c_str());
 605             }
 606             else
 607             {
 608                 // use the next char instead
 609                 ch = in[n];
 610             }
 611         }
 612         else if ( ch == _T('\t') )
 613         {
 614             // everything after TAB is accel string, exit the loop
 615             break;
 616         }
 617
 618         out += ch;
 619     }
 620
 621     return out;
 622 }
 623
 624 #endif // wxUSE_MENUS
 625
 626 // ----------------------------------------------------------------------------
 627 // Window search functions
 628 // ----------------------------------------------------------------------------
 629
 630 /*
 631  * If parent is non-NULL, look through children for a label or title
 632  * matching the specified string. If NULL, look through all top-level windows.
 633  *
 634  */
 635
 636 wxWindow *
 637 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 638 {
 639     return wxWindow::FindWindowByLabel( title, parent );
 640 }
 641
 642
 643 /*
 644  * If parent is non-NULL, look through children for a name
 645  * matching the specified string. If NULL, look through all top-level windows.
 646  *
 647  */
 648
 649 wxWindow *
 650 wxFindWindowByName (const wxString& name, wxWindow * parent)
 651 {
 652     return wxWindow::FindWindowByName( name, parent );
 653 }
 654
 655 // Returns menu item id or -1 if none.
 656 int
 657 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 658 {
 659 #if wxUSE_MENUS
 660   wxMenuBar *menuBar = frame->GetMenuBar ();
 661   if ( menuBar )
 662       return menuBar->FindMenuItem (menuString, itemString);
 663 #endif // wxUSE_MENUS
 664
 665   return -1;
 666 }
 667
 668 // Try to find the deepest child that contains 'pt'.
 669 // We go backwards, to try to allow for controls that are spacially
 670 // within other controls, but are still siblings (e.g. buttons within
 671 // static boxes). Static boxes are likely to be created _before_ controls
 672 // that sit inside them.
 673 wxWindow* wxFindWindowAtPoint(wxWindow* win, const wxPoint& pt)
 674 {
 675     if (!win->IsShown())
 676         return NULL;
 677
 678     // Hack for wxNotebook case: at least in wxGTK, all pages
 679     // claim to be shown, so we must only deal with the selected one.
 680 #if wxUSE_NOTEBOOK
 681     if (win->IsKindOf(CLASSINFO(wxNotebook)))
 682     {
 683       wxNotebook* nb = (wxNotebook*) win;
 684       int sel = nb->GetSelection();
 685       if (sel >= 0)
 686       {
 687         wxWindow* child = nb->GetPage(sel);
 688         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 689         if (foundWin)
 690            return foundWin;
 691       }
 692     }
 693 #endif
 694
 695     wxWindowList::compatibility_iterator node = win->GetChildren().GetLast();
 696     while (node)
 697     {
 698         wxWindow* child = node->GetData();
 699         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 700         if (foundWin)
 701           return foundWin;
 702         node = node->GetPrevious();
 703     }
 704
 705     wxPoint pos = win->GetPosition();
 706     wxSize sz = win->GetSize();
 707     if (win->GetParent())
 708     {
 709         pos = win->GetParent()->ClientToScreen(pos);
 710     }
 711
 712     wxRect rect(pos, sz);
 713     if (rect.Inside(pt))
 714         return win;
 715     else
 716         return NULL;
 717 }
 718
 719 wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt)
 720 {
 721     // Go backwards through the list since windows
 722     // on top are likely to have been appended most
 723     // recently.
 724     wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetLast();
 725     while (node)
 726     {
 727         wxWindow* win = node->GetData();
 728         wxWindow* found = wxFindWindowAtPoint(win, pt);
 729         if (found)
 730             return found;
 731         node = node->GetPrevious();
 732     }
 733     return NULL;
 734 }
 735
 736 // ----------------------------------------------------------------------------
 737 // GUI helpers
 738 // ----------------------------------------------------------------------------
 739
 740 /*
 741  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 742  * since otherwise the generic code may be pulled in unnecessarily.
 743  */
 744
 745 #if wxUSE_MSGDLG
 746
 747 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 748                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 749 {
 750     wxMessageDialog dialog(parent, message, caption, style);
 751
 752     int ans = dialog.ShowModal();
 753     switch ( ans )
 754     {
 755         case wxID_OK:
 756             return wxOK;
 757         case wxID_YES:
 758             return wxYES;
 759         case wxID_NO:
 760             return wxNO;
 761         case wxID_CANCEL:
 762             return wxCANCEL;
 763     }
 764
 765     wxFAIL_MSG( _T("unexpected return code from wxMessageDialog") );
 766
 767     return wxCANCEL;
 768 }
 769
 770 #endif // wxUSE_MSGDLG
 771
 772 #if wxUSE_TEXTDLG
 773
 774 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 775                         const wxString& defaultValue, wxWindow *parent,
 776                         int x, int y, bool WXUNUSED(centre) )
 777 {
 778     wxString str;
 779     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 780     if (dialog.ShowModal() == wxID_OK)
 781     {
 782         str = dialog.GetValue();
 783     }
 784
 785     return str;
 786 }
 787
 788 wxString wxGetPasswordFromUser(const wxString& message,
 789                                const wxString& caption,
 790                                const wxString& defaultValue,
 791                                wxWindow *parent)
 792 {
 793     wxString str;
 794     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
 795                              wxOK | wxCANCEL | wxTE_PASSWORD);
 796     if ( dialog.ShowModal() == wxID_OK )
 797     {
 798         str = dialog.GetValue();
 799     }
 800
 801     return str;
 802 }
 803
 804 #endif // wxUSE_TEXTDLG
 805
 806 #if wxUSE_COLOURDLG
 807
 808 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
 809 {
 810     wxColourData data;
 811     data.SetChooseFull(TRUE);
 812     if ( colInit.Ok() )
 813     {
 814         data.SetColour((wxColour &)colInit); // const_cast
 815     }
 816
 817     wxColour colRet;
 818     wxColourDialog dialog(parent, &data);
 819     if ( dialog.ShowModal() == wxID_OK )
 820     {
 821         colRet = dialog.GetColourData().GetColour();
 822     }
 823     //else: leave it invalid
 824
 825     return colRet;
 826 }
 827
 828 #endif // wxUSE_COLOURDLG
 829
 830 #if wxUSE_FONTDLG
 831
 832 wxFont wxGetFontFromUser(wxWindow *parent, const wxFont& fontInit)
 833 {
 834     wxFontData data;
 835     if ( fontInit.Ok() )
 836     {
 837         data.SetInitialFont(fontInit);
 838     }
 839
 840     wxFont fontRet;
 841     wxFontDialog dialog(parent, data);
 842     if ( dialog.ShowModal() == wxID_OK )
 843     {
 844         fontRet = dialog.GetFontData().GetChosenFont();
 845     }
 846     //else: leave it invalid
 847
 848     return fontRet;
 849 }
 850
 851 #endif // wxUSE_FONTDLG
 852
 853 // ----------------------------------------------------------------------------
 854 // wxSafeYield and supporting functions
 855 // ----------------------------------------------------------------------------
 856
 857 void wxEnableTopLevelWindows(bool enable)
 858 {
 859     wxWindowList::compatibility_iterator node;
 860     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 861         node->GetData()->Enable(enable);
 862 }
 863
 864 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 865 {
 866     // remember the top level windows which were already disabled, so that we
 867     // don't reenable them later
 868     m_winDisabled = NULL;
 869
 870     wxWindowList::compatibility_iterator node;
 871     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 872     {
 873         wxWindow *winTop = node->GetData();
 874         if ( winTop == winToSkip )
 875             continue;
 876
 877         // we don't need to disable the hidden or already disabled windows
 878         if ( winTop->IsEnabled() && winTop->IsShown() )
 879         {
 880             winTop->Disable();
 881         }
 882         else
 883         {
 884             if ( !m_winDisabled )
 885             {
 886                 m_winDisabled = new wxWindowList;
 887             }
 888
 889             m_winDisabled->Append(winTop);
 890         }
 891     }
 892 }
 893
 894 wxWindowDisabler::~wxWindowDisabler()
 895 {
 896     wxWindowList::compatibility_iterator node;
 897     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 898     {
 899         wxWindow *winTop = node->GetData();
 900         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
 901         {
 902             winTop->Enable();
 903         }
 904         //else: had been already disabled, don't reenable
 905     }
 906
 907     delete m_winDisabled;
 908 }
 909
 910 // Yield to other apps/messages and disable user input to all windows except
 911 // the given one
 912 bool wxSafeYield(wxWindow *win, bool onlyIfNeeded)
 913 {
 914     wxWindowDisabler wd(win);
 915
 916     bool rc;
 917     if (onlyIfNeeded)
 918         rc = wxYieldIfNeeded();
 919     else
 920         rc = wxYield();
 921
 922     return rc;
 923 }
 924
 925 // Don't synthesize KeyUp events holding down a key and producing KeyDown
 926 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
 927 // in utilsgtk.cpp.
 928 #ifndef __WXGTK__
 929 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
 930 {
 931     return TRUE;    // detectable auto-repeat is the only mode MSW supports
 932 }
 933 #endif // !wxGTK
 934
 935 #endif // wxUSE_GUI
 936