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 #include <time.h>
  77
  78 #ifndef __MWERKS__
  79     #include <sys/types.h>
  80     #include <sys/stat.h>
  81 #endif
  82
  83 #ifdef __SALFORDC__
  84     #include <clib.h>
  85 #endif
  86
  87 #ifdef __WXMSW__
  88     #include "wx/msw/private.h"
  89 #endif
  90
  91 #if wxUSE_BASE
  92
  93 // ----------------------------------------------------------------------------
  94 // common data
  95 // ----------------------------------------------------------------------------
  96
  97 #if WXWIN_COMPATIBILITY_2_2
  98     const wxChar *wxInternalErrorStr = wxT("wxWindows Internal Error");
  99     const wxChar *wxFatalErrorStr = wxT("wxWindows Fatal Error");
 100 #endif // WXWIN_COMPATIBILITY_2_2
 101
 102 // ============================================================================
 103 // implementation
 104 // ============================================================================
 105
 106 #if WXWIN_COMPATIBILITY_2_4
 107
 108 wxChar *
 109 copystring (const wxChar *s)
 110 {
 111   if (s == NULL) s = wxT("");
 112   size_t len = wxStrlen (s) + 1;
 113
 114   wxChar *news = new wxChar[len];
 115   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 116
 117   return news;
 118 }
 119
 120 #endif // WXWIN_COMPATIBILITY_2_4
 121
 122 // Id generation
 123 static long wxCurrentId = 100;
 124
 125 long
 126 wxNewId (void)
 127 {
 128   return wxCurrentId++;
 129 }
 130
 131 long
 132 wxGetCurrentId(void) { return wxCurrentId; }
 133
 134 void
 135 wxRegisterId (long id)
 136 {
 137   if (id >= wxCurrentId)
 138     wxCurrentId = id + 1;
 139 }
 140
 141 // ----------------------------------------------------------------------------
 142 // String <-> Number conversions (deprecated)
 143 // ----------------------------------------------------------------------------
 144
 145 #if WXWIN_COMPATIBILITY_2_4
 146
 147 WXDLLIMPEXP_DATA_BASE(const wxChar *) wxFloatToStringStr = wxT("%.2f");
 148 WXDLLIMPEXP_DATA_BASE(const wxChar *) wxDoubleToStringStr = wxT("%.2f");
 149
 150 void
 151 StringToFloat (const wxChar *s, float *number)
 152 {
 153   if (s && *s && number)
 154     *number = (float) wxStrtod (s, (wxChar **) NULL);
 155 }
 156
 157 void
 158 StringToDouble (const wxChar *s, double *number)
 159 {
 160   if (s && *s && number)
 161     *number = wxStrtod (s, (wxChar **) NULL);
 162 }
 163
 164 wxChar *
 165 FloatToString (float number, const wxChar *fmt)
 166 {
 167   static wxChar buf[256];
 168
 169   wxSprintf (buf, fmt, number);
 170   return buf;
 171 }
 172
 173 wxChar *
 174 DoubleToString (double number, const wxChar *fmt)
 175 {
 176   static wxChar buf[256];
 177
 178   wxSprintf (buf, fmt, number);
 179   return buf;
 180 }
 181
 182 void
 183 StringToInt (const wxChar *s, int *number)
 184 {
 185   if (s && *s && number)
 186     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 187 }
 188
 189 void
 190 StringToLong (const wxChar *s, long *number)
 191 {
 192   if (s && *s && number)
 193     *number = wxStrtol (s, (wxChar **) NULL, 10);
 194 }
 195
 196 wxChar *
 197 IntToString (int number)
 198 {
 199   static wxChar buf[20];
 200
 201   wxSprintf (buf, wxT("%d"), number);
 202   return buf;
 203 }
 204
 205 wxChar *
 206 LongToString (long number)
 207 {
 208   static wxChar buf[20];
 209
 210   wxSprintf (buf, wxT("%ld"), number);
 211   return buf;
 212 }
 213
 214 #endif // WXWIN_COMPATIBILITY_2_4
 215
 216 // Array used in DecToHex conversion routine.
 217 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 218
 219 // Convert 2-digit hex number to decimal
 220 int wxHexToDec(const wxString& buf)
 221 {
 222   int firstDigit, secondDigit;
 223
 224   if (buf.GetChar(0) >= wxT('A'))
 225     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 226   else
 227     firstDigit = buf.GetChar(0) - wxT('0');
 228
 229   if (buf.GetChar(1) >= wxT('A'))
 230     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 231   else
 232     secondDigit = buf.GetChar(1) - wxT('0');
 233
 234   return (firstDigit & 0xF) * 16 + (secondDigit & 0xF );
 235 }
 236
 237 // Convert decimal integer to 2-character hex string
 238 void wxDecToHex(int dec, wxChar *buf)
 239 {
 240   int firstDigit = (int)(dec/16.0);
 241   int secondDigit = (int)(dec - (firstDigit*16.0));
 242   buf[0] = hexArray[firstDigit];
 243   buf[1] = hexArray[secondDigit];
 244   buf[2] = 0;
 245 }
 246
 247 // Convert decimal integer to 2-character hex string
 248 wxString wxDecToHex(int dec)
 249 {
 250     wxChar buf[3];
 251     wxDecToHex(dec, buf);
 252     return wxString(buf);
 253 }
 254
 255 // ----------------------------------------------------------------------------
 256 // misc functions
 257 // ----------------------------------------------------------------------------
 258
 259 // Return the current date/time
 260 wxString wxNow()
 261 {
 262     time_t now = time((time_t *) NULL);
 263     char *date = ctime(&now);
 264     date[24] = '\0';
 265     return wxString::FromAscii(date);
 266 }
 267
 268 const wxChar *wxGetInstallPrefix()
 269 {
 270     wxString prefix;
 271
 272     if ( wxGetEnv(wxT("WXPREFIX"), &prefix) )
 273         return prefix.c_str();
 274
 275 #ifdef wxINSTALL_PREFIX
 276     return wxT(wxINSTALL_PREFIX);
 277 #else
 278     return wxT("");
 279 #endif
 280 }
 281
 282 wxString wxGetDataDir()
 283 {
 284     wxString format = wxGetInstallPrefix();
 285     format <<  wxFILE_SEP_PATH
 286            << wxT("share") << wxFILE_SEP_PATH
 287            << wxT("wx") << wxFILE_SEP_PATH
 288            << wxT("%i.%i");
 289     wxString dir;
 290     dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
 291     return dir;
 292 }
 293
 294 int wxGetOsVersion(int *verMaj, int *verMin)
 295 {
 296     // we want this function to work even if there is no wxApp
 297     wxConsoleAppTraits traitsConsole;
 298     wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
 299     if ( ! traits )
 300         traits = &traitsConsole;
 301
 302     return traits->GetOSVersion(verMaj, verMin);
 303 }
 304
 305 // ----------------------------------------------------------------------------
 306 // network and user id functions
 307 // ----------------------------------------------------------------------------
 308
 309 // Get Full RFC822 style email address
 310 bool wxGetEmailAddress(wxChar *address, int maxSize)
 311 {
 312     wxString email = wxGetEmailAddress();
 313     if ( !email )
 314         return FALSE;
 315
 316     wxStrncpy(address, email, maxSize - 1);
 317     address[maxSize - 1] = wxT('\0');
 318
 319     return TRUE;
 320 }
 321
 322 wxString wxGetEmailAddress()
 323 {
 324     wxString email;
 325
 326     wxString host = wxGetFullHostName();
 327     if ( !!host )
 328     {
 329         wxString user = wxGetUserId();
 330         if ( !!user )
 331         {
 332             email << user << wxT('@') << host;
 333         }
 334     }
 335
 336     return email;
 337 }
 338
 339 wxString wxGetUserId()
 340 {
 341     static const int maxLoginLen = 256; // FIXME arbitrary number
 342
 343     wxString buf;
 344     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
 345     buf.UngetWriteBuf();
 346
 347     if ( !ok )
 348         buf.Empty();
 349
 350     return buf;
 351 }
 352
 353 wxString wxGetUserName()
 354 {
 355     static const int maxUserNameLen = 1024; // FIXME arbitrary number
 356
 357     wxString buf;
 358     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
 359     buf.UngetWriteBuf();
 360
 361     if ( !ok )
 362         buf.Empty();
 363
 364     return buf;
 365 }
 366
 367 wxString wxGetHostName()
 368 {
 369     static const size_t hostnameSize = 257;
 370
 371     wxString buf;
 372     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 373
 374     buf.UngetWriteBuf();
 375
 376     if ( !ok )
 377         buf.Empty();
 378
 379     return buf;
 380 }
 381
 382 wxString wxGetFullHostName()
 383 {
 384     static const size_t hostnameSize = 257;
 385
 386     wxString buf;
 387     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 388
 389     buf.UngetWriteBuf();
 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 #if wxUSE_MENUS
 545
 546 // ----------------------------------------------------------------------------
 547 // Menu accelerators related functions
 548 // ----------------------------------------------------------------------------
 549
 550 wxChar *wxStripMenuCodes(const wxChar *in, wxChar *out)
 551 {
 552     wxString s = wxMenuItem::GetLabelFromText(in);
 553     if ( out )
 554     {
 555         // go smash their buffer if it's not big enough - I love char * params
 556         memcpy(out, s.c_str(), s.length() * sizeof(wxChar));
 557     }
 558     else
 559     {
 560         // MYcopystring - for easier search...
 561         out = new wxChar[s.length() + 1];
 562         wxStrcpy(out, s.c_str());
 563     }
 564
 565     return out;
 566 }
 567
 568 wxString wxStripMenuCodes(const wxString& in)
 569 {
 570     wxString out;
 571
 572     size_t len = in.length();
 573     out.reserve(len);
 574
 575     for ( size_t n = 0; n < len; n++ )
 576     {
 577         wxChar ch = in[n];
 578         if ( ch == _T('&') )
 579         {
 580             // skip it, it is used to introduce the accel char (or to quote
 581             // itself in which case it should still be skipped): note that it
 582             // can't be the last character of the string
 583             if ( ++n == len )
 584             {
 585                 wxLogDebug(_T("Invalid menu string '%s'"), in.c_str());
 586             }
 587             else
 588             {
 589                 // use the next char instead
 590                 ch = in[n];
 591             }
 592         }
 593         else if ( ch == _T('\t') )
 594         {
 595             // everything after TAB is accel string, exit the loop
 596             break;
 597         }
 598
 599         out += ch;
 600     }
 601
 602     return out;
 603 }
 604
 605 #endif // wxUSE_MENUS
 606
 607 // ----------------------------------------------------------------------------
 608 // Window search functions
 609 // ----------------------------------------------------------------------------
 610
 611 /*
 612  * If parent is non-NULL, look through children for a label or title
 613  * matching the specified string. If NULL, look through all top-level windows.
 614  *
 615  */
 616
 617 wxWindow *
 618 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 619 {
 620     return wxWindow::FindWindowByLabel( title, parent );
 621 }
 622
 623
 624 /*
 625  * If parent is non-NULL, look through children for a name
 626  * matching the specified string. If NULL, look through all top-level windows.
 627  *
 628  */
 629
 630 wxWindow *
 631 wxFindWindowByName (const wxString& name, wxWindow * parent)
 632 {
 633     return wxWindow::FindWindowByName( name, parent );
 634 }
 635
 636 // Returns menu item id or -1 if none.
 637 int
 638 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 639 {
 640 #if wxUSE_MENUS
 641   wxMenuBar *menuBar = frame->GetMenuBar ();
 642   if ( menuBar )
 643       return menuBar->FindMenuItem (menuString, itemString);
 644 #endif // wxUSE_MENUS
 645
 646   return -1;
 647 }
 648
 649 // Try to find the deepest child that contains 'pt'.
 650 // We go backwards, to try to allow for controls that are spacially
 651 // within other controls, but are still siblings (e.g. buttons within
 652 // static boxes). Static boxes are likely to be created _before_ controls
 653 // that sit inside them.
 654 wxWindow* wxFindWindowAtPoint(wxWindow* win, const wxPoint& pt)
 655 {
 656     if (!win->IsShown())
 657         return NULL;
 658
 659     // Hack for wxNotebook case: at least in wxGTK, all pages
 660     // claim to be shown, so we must only deal with the selected one.
 661 #if wxUSE_NOTEBOOK
 662     if (win->IsKindOf(CLASSINFO(wxNotebook)))
 663     {
 664       wxNotebook* nb = (wxNotebook*) win;
 665       int sel = nb->GetSelection();
 666       if (sel >= 0)
 667       {
 668         wxWindow* child = nb->GetPage(sel);
 669         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 670         if (foundWin)
 671            return foundWin;
 672       }
 673     }
 674 #endif
 675
 676     wxWindowList::compatibility_iterator node = win->GetChildren().GetLast();
 677     while (node)
 678     {
 679         wxWindow* child = node->GetData();
 680         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 681         if (foundWin)
 682           return foundWin;
 683         node = node->GetPrevious();
 684     }
 685
 686     wxPoint pos = win->GetPosition();
 687     wxSize sz = win->GetSize();
 688     if (win->GetParent())
 689     {
 690         pos = win->GetParent()->ClientToScreen(pos);
 691     }
 692
 693     wxRect rect(pos, sz);
 694     if (rect.Inside(pt))
 695         return win;
 696     else
 697         return NULL;
 698 }
 699
 700 wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt)
 701 {
 702     // Go backwards through the list since windows
 703     // on top are likely to have been appended most
 704     // recently.
 705     wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetLast();
 706     while (node)
 707     {
 708         wxWindow* win = node->GetData();
 709         wxWindow* found = wxFindWindowAtPoint(win, pt);
 710         if (found)
 711             return found;
 712         node = node->GetPrevious();
 713     }
 714     return NULL;
 715 }
 716
 717 // ----------------------------------------------------------------------------
 718 // GUI helpers
 719 // ----------------------------------------------------------------------------
 720
 721 /*
 722  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 723  * since otherwise the generic code may be pulled in unnecessarily.
 724  */
 725
 726 #if wxUSE_MSGDLG
 727
 728 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 729                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 730 {
 731     wxMessageDialog dialog(parent, message, caption, style);
 732
 733     int ans = dialog.ShowModal();
 734     switch ( ans )
 735     {
 736         case wxID_OK:
 737             return wxOK;
 738         case wxID_YES:
 739             return wxYES;
 740         case wxID_NO:
 741             return wxNO;
 742         case wxID_CANCEL:
 743             return wxCANCEL;
 744     }
 745
 746     wxFAIL_MSG( _T("unexpected return code from wxMessageDialog") );
 747
 748     return wxCANCEL;
 749 }
 750
 751 #endif // wxUSE_MSGDLG
 752
 753 #if wxUSE_TEXTDLG
 754
 755 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 756                         const wxString& defaultValue, wxWindow *parent,
 757                         int x, int y, bool WXUNUSED(centre) )
 758 {
 759     wxString str;
 760     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 761     if (dialog.ShowModal() == wxID_OK)
 762     {
 763         str = dialog.GetValue();
 764     }
 765
 766     return str;
 767 }
 768
 769 wxString wxGetPasswordFromUser(const wxString& message,
 770                                const wxString& caption,
 771                                const wxString& defaultValue,
 772                                wxWindow *parent)
 773 {
 774     wxString str;
 775     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
 776                              wxOK | wxCANCEL | wxTE_PASSWORD);
 777     if ( dialog.ShowModal() == wxID_OK )
 778     {
 779         str = dialog.GetValue();
 780     }
 781
 782     return str;
 783 }
 784
 785 #endif // wxUSE_TEXTDLG
 786
 787 #if wxUSE_COLOURDLG
 788
 789 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
 790 {
 791     wxColourData data;
 792     data.SetChooseFull(TRUE);
 793     if ( colInit.Ok() )
 794     {
 795         data.SetColour((wxColour &)colInit); // const_cast
 796     }
 797
 798     wxColour colRet;
 799     wxColourDialog dialog(parent, &data);
 800     if ( dialog.ShowModal() == wxID_OK )
 801     {
 802         colRet = dialog.GetColourData().GetColour();
 803     }
 804     //else: leave it invalid
 805
 806     return colRet;
 807 }
 808
 809 #endif // wxUSE_COLOURDLG
 810
 811 #if wxUSE_FONTDLG
 812
 813 wxFont wxGetFontFromUser(wxWindow *parent, const wxFont& fontInit)
 814 {
 815     wxFontData data;
 816     if ( fontInit.Ok() )
 817     {
 818         data.SetInitialFont(fontInit);
 819     }
 820
 821     wxFont fontRet;
 822     wxFontDialog dialog(parent, data);
 823     if ( dialog.ShowModal() == wxID_OK )
 824     {
 825         fontRet = dialog.GetFontData().GetChosenFont();
 826     }
 827     //else: leave it invalid
 828
 829     return fontRet;
 830 }
 831
 832 #endif // wxUSE_FONTDLG
 833
 834 // ----------------------------------------------------------------------------
 835 // wxSafeYield and supporting functions
 836 // ----------------------------------------------------------------------------
 837
 838 void wxEnableTopLevelWindows(bool enable)
 839 {
 840     wxWindowList::compatibility_iterator node;
 841     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 842         node->GetData()->Enable(enable);
 843 }
 844
 845 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 846 {
 847     // remember the top level windows which were already disabled, so that we
 848     // don't reenable them later
 849     m_winDisabled = NULL;
 850
 851     wxWindowList::compatibility_iterator node;
 852     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 853     {
 854         wxWindow *winTop = node->GetData();
 855         if ( winTop == winToSkip )
 856             continue;
 857
 858         // we don't need to disable the hidden or already disabled windows
 859         if ( winTop->IsEnabled() && winTop->IsShown() )
 860         {
 861             winTop->Disable();
 862         }
 863         else
 864         {
 865             if ( !m_winDisabled )
 866             {
 867                 m_winDisabled = new wxWindowList;
 868             }
 869
 870             m_winDisabled->Append(winTop);
 871         }
 872     }
 873 }
 874
 875 wxWindowDisabler::~wxWindowDisabler()
 876 {
 877     wxWindowList::compatibility_iterator node;
 878     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 879     {
 880         wxWindow *winTop = node->GetData();
 881         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
 882         {
 883             winTop->Enable();
 884         }
 885         //else: had been already disabled, don't reenable
 886     }
 887
 888     delete m_winDisabled;
 889 }
 890
 891 // Yield to other apps/messages and disable user input to all windows except
 892 // the given one
 893 bool wxSafeYield(wxWindow *win, bool onlyIfNeeded)
 894 {
 895     wxWindowDisabler wd(win);
 896
 897     bool rc;
 898     if (onlyIfNeeded)
 899         rc = wxYieldIfNeeded();
 900     else
 901         rc = wxYield();
 902
 903     return rc;
 904 }
 905
 906 // Don't synthesize KeyUp events holding down a key and producing KeyDown
 907 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
 908 // in utilsgtk.cpp.
 909 #ifndef __WXGTK__
 910 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
 911 {
 912     return TRUE;    // detectable auto-repeat is the only mode MSW supports
 913 }
 914 #endif // !wxGTK
 915
 916 #endif // wxUSE_GUI
 917