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[wxWidgets.git] / src / common / utilscmn.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/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 // For compilers that support precompilation, includes "wx.h".
21 #include "wx/wxprec.h"
22
23 #ifdef __BORLANDC__
24 #pragma hdrstop
25 #endif
26
27 #ifndef WX_PRECOMP
28 #include "wx/app.h"
29 #include "wx/string.h"
30 #include "wx/utils.h"
31 #include "wx/intl.h"
32 #include "wx/log.h"
33
34 #if wxUSE_GUI
35 #include "wx/window.h"
36 #include "wx/frame.h"
37 #include "wx/menu.h"
38 #include "wx/msgdlg.h"
39 #include "wx/textdlg.h"
40 #include "wx/textctrl.h" // for wxTE_PASSWORD
41 #if wxUSE_ACCEL
42 #include "wx/menuitem.h"
43 #include "wx/accel.h"
44 #endif // wxUSE_ACCEL
45 #endif // wxUSE_GUI
46 #endif // WX_PRECOMP
47
48 #include "wx/apptrait.h"
49
50 #include "wx/process.h"
51 #include "wx/txtstrm.h"
52 #include "wx/uri.h"
53 #include "wx/mimetype.h"
54 #include "wx/config.h"
55 #include "wx/versioninfo.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 !wxONLY_WATCOM_EARLIER_THAN(1,4)
67 #if !(defined(_MSC_VER) && (_MSC_VER > 800))
68 #include <errno.h>
69 #endif
70 #endif
71
72 #if wxUSE_GUI
73 #include "wx/notebook.h"
74 #include "wx/statusbr.h"
75 #endif // wxUSE_GUI
76
77 #ifndef __WXWINCE__
78 #include <time.h>
79 #else
80 #include "wx/msw/wince/time.h"
81 #endif
82
83 #ifdef __WXMAC__
84 #include "wx/osx/private.h"
85 #endif
86
87 #if !defined(__WXWINCE__)
88 #include <sys/types.h>
89 #include <sys/stat.h>
90 #endif
91
92 #if defined(__WINDOWS__)
93 #include "wx/msw/private.h"
94 #include "wx/filesys.h"
95 #endif
96
97 #if wxUSE_GUI && defined(__WXGTK__)
98 #include <gtk/gtk.h> // for GTK_XXX_VERSION constants
99 #endif
100
101 #if wxUSE_BASE
102
103 // ============================================================================
104 // implementation
105 // ============================================================================
106
107 // Array used in DecToHex conversion routine.
108 static const wxChar hexArray[] = wxT("0123456789ABCDEF");
109
110 // Convert 2-digit hex number to decimal
111 int wxHexToDec(const wxString& str)
112 {
113 char buf[2];
114 buf[0] = str.GetChar(0);
115 buf[1] = str.GetChar(1);
116 return wxHexToDec((const char*) buf);
117 }
118
119 // Convert decimal integer to 2-character hex string
120 void wxDecToHex(int dec, wxChar *buf)
121 {
122 int firstDigit = (int)(dec/16.0);
123 int secondDigit = (int)(dec - (firstDigit*16.0));
124 buf[0] = hexArray[firstDigit];
125 buf[1] = hexArray[secondDigit];
126 buf[2] = 0;
127 }
128
129 // Convert decimal integer to 2 characters
130 void wxDecToHex(int dec, char* ch1, char* ch2)
131 {
132 int firstDigit = (int)(dec/16.0);
133 int secondDigit = (int)(dec - (firstDigit*16.0));
134 (*ch1) = (char) hexArray[firstDigit];
135 (*ch2) = (char) hexArray[secondDigit];
136 }
137
138 // Convert decimal integer to 2-character hex string
139 wxString wxDecToHex(int dec)
140 {
141 wxChar buf[3];
142 wxDecToHex(dec, buf);
143 return wxString(buf);
144 }
145
146 // ----------------------------------------------------------------------------
147 // misc functions
148 // ----------------------------------------------------------------------------
149
150 // Return the current date/time
151 wxString wxNow()
152 {
153 #ifdef __WXWINCE__
154 #if wxUSE_DATETIME
155 wxDateTime now = wxDateTime::Now();
156 return now.Format();
157 #else
158 return wxEmptyString;
159 #endif
160 #else
161 time_t now = time(NULL);
162 char *date = ctime(&now);
163 date[24] = '\0';
164 return wxString::FromAscii(date);
165 #endif
166 }
167
168 #if WXWIN_COMPATIBILITY_2_8
169 void wxUsleep(unsigned long milliseconds)
170 {
171 wxMilliSleep(milliseconds);
172 }
173 #endif
174
175 const wxChar *wxGetInstallPrefix()
176 {
177 wxString prefix;
178
179 if ( wxGetEnv(wxT("WXPREFIX"), &prefix) )
180 return prefix.c_str();
181
182 #ifdef wxINSTALL_PREFIX
183 return wxT(wxINSTALL_PREFIX);
184 #else
185 return wxEmptyString;
186 #endif
187 }
188
189 wxString wxGetDataDir()
190 {
191 wxString dir = wxGetInstallPrefix();
192 dir << wxFILE_SEP_PATH << wxT("share") << wxFILE_SEP_PATH << wxT("wx");
193 return dir;
194 }
195
196 bool wxIsPlatformLittleEndian()
197 {
198 // Are we little or big endian? This method is from Harbison & Steele.
199 union
200 {
201 long l;
202 char c[sizeof(long)];
203 } u;
204 u.l = 1;
205
206 return u.c[0] == 1;
207 }
208
209
210 // ----------------------------------------------------------------------------
211 // wxPlatform
212 // ----------------------------------------------------------------------------
213
214 /*
215 * Class to make it easier to specify platform-dependent values
216 */
217
218 wxArrayInt* wxPlatform::sm_customPlatforms = NULL;
219
220 void wxPlatform::Copy(const wxPlatform& platform)
221 {
222 m_longValue = platform.m_longValue;
223 m_doubleValue = platform.m_doubleValue;
224 m_stringValue = platform.m_stringValue;
225 }
226
227 wxPlatform wxPlatform::If(int platform, long value)
228 {
229 if (Is(platform))
230 return wxPlatform(value);
231 else
232 return wxPlatform();
233 }
234
235 wxPlatform wxPlatform::IfNot(int platform, long value)
236 {
237 if (!Is(platform))
238 return wxPlatform(value);
239 else
240 return wxPlatform();
241 }
242
243 wxPlatform& wxPlatform::ElseIf(int platform, long value)
244 {
245 if (Is(platform))
246 m_longValue = value;
247 return *this;
248 }
249
250 wxPlatform& wxPlatform::ElseIfNot(int platform, long value)
251 {
252 if (!Is(platform))
253 m_longValue = value;
254 return *this;
255 }
256
257 wxPlatform wxPlatform::If(int platform, double value)
258 {
259 if (Is(platform))
260 return wxPlatform(value);
261 else
262 return wxPlatform();
263 }
264
265 wxPlatform wxPlatform::IfNot(int platform, double value)
266 {
267 if (!Is(platform))
268 return wxPlatform(value);
269 else
270 return wxPlatform();
271 }
272
273 wxPlatform& wxPlatform::ElseIf(int platform, double value)
274 {
275 if (Is(platform))
276 m_doubleValue = value;
277 return *this;
278 }
279
280 wxPlatform& wxPlatform::ElseIfNot(int platform, double value)
281 {
282 if (!Is(platform))
283 m_doubleValue = value;
284 return *this;
285 }
286
287 wxPlatform wxPlatform::If(int platform, const wxString& value)
288 {
289 if (Is(platform))
290 return wxPlatform(value);
291 else
292 return wxPlatform();
293 }
294
295 wxPlatform wxPlatform::IfNot(int platform, const wxString& value)
296 {
297 if (!Is(platform))
298 return wxPlatform(value);
299 else
300 return wxPlatform();
301 }
302
303 wxPlatform& wxPlatform::ElseIf(int platform, const wxString& value)
304 {
305 if (Is(platform))
306 m_stringValue = value;
307 return *this;
308 }
309
310 wxPlatform& wxPlatform::ElseIfNot(int platform, const wxString& value)
311 {
312 if (!Is(platform))
313 m_stringValue = value;
314 return *this;
315 }
316
317 wxPlatform& wxPlatform::Else(long value)
318 {
319 m_longValue = value;
320 return *this;
321 }
322
323 wxPlatform& wxPlatform::Else(double value)
324 {
325 m_doubleValue = value;
326 return *this;
327 }
328
329 wxPlatform& wxPlatform::Else(const wxString& value)
330 {
331 m_stringValue = value;
332 return *this;
333 }
334
335 void wxPlatform::AddPlatform(int platform)
336 {
337 if (!sm_customPlatforms)
338 sm_customPlatforms = new wxArrayInt;
339 sm_customPlatforms->Add(platform);
340 }
341
342 void wxPlatform::ClearPlatforms()
343 {
344 wxDELETE(sm_customPlatforms);
345 }
346
347 /// Function for testing current platform
348
349 bool wxPlatform::Is(int platform)
350 {
351 #ifdef __WINDOWS__
352 if (platform == wxOS_WINDOWS)
353 return true;
354 #endif
355 #ifdef __WXWINCE__
356 if (platform == wxOS_WINDOWS_CE)
357 return true;
358 #endif
359
360 #if 0
361
362 // FIXME: wxWinPocketPC and wxWinSmartPhone are unknown symbols
363
364 #if defined(__WXWINCE__) && defined(__POCKETPC__)
365 if (platform == wxWinPocketPC)
366 return true;
367 #endif
368 #if defined(__WXWINCE__) && defined(__SMARTPHONE__)
369 if (platform == wxWinSmartPhone)
370 return true;
371 #endif
372
373 #endif
374
375 #ifdef __WXGTK__
376 if (platform == wxPORT_GTK)
377 return true;
378 #endif
379 #ifdef __WXMAC__
380 if (platform == wxPORT_MAC)
381 return true;
382 #endif
383 #ifdef __WXX11__
384 if (platform == wxPORT_X11)
385 return true;
386 #endif
387 #ifdef __UNIX__
388 if (platform == wxOS_UNIX)
389 return true;
390 #endif
391 #ifdef __OS2__
392 if (platform == wxOS_OS2)
393 return true;
394 #endif
395 #ifdef __WXPM__
396 if (platform == wxPORT_PM)
397 return true;
398 #endif
399 #ifdef __WXCOCOA__
400 if (platform == wxPORT_MAC)
401 return true;
402 #endif
403
404 if (sm_customPlatforms && sm_customPlatforms->Index(platform) != wxNOT_FOUND)
405 return true;
406
407 return false;
408 }
409
410 // ----------------------------------------------------------------------------
411 // network and user id functions
412 // ----------------------------------------------------------------------------
413
414 // Get Full RFC822 style email address
415 bool wxGetEmailAddress(wxChar *address, int maxSize)
416 {
417 wxString email = wxGetEmailAddress();
418 if ( !email )
419 return false;
420
421 wxStrlcpy(address, email.t_str(), maxSize);
422
423 return true;
424 }
425
426 wxString wxGetEmailAddress()
427 {
428 wxString email;
429
430 wxString host = wxGetFullHostName();
431 if ( !host.empty() )
432 {
433 wxString user = wxGetUserId();
434 if ( !user.empty() )
435 {
436 email << user << wxT('@') << host;
437 }
438 }
439
440 return email;
441 }
442
443 wxString wxGetUserId()
444 {
445 static const int maxLoginLen = 256; // FIXME arbitrary number
446
447 wxString buf;
448 bool ok = wxGetUserId(wxStringBuffer(buf, maxLoginLen), maxLoginLen);
449
450 if ( !ok )
451 buf.Empty();
452
453 return buf;
454 }
455
456 wxString wxGetUserName()
457 {
458 static const int maxUserNameLen = 1024; // FIXME arbitrary number
459
460 wxString buf;
461 bool ok = wxGetUserName(wxStringBuffer(buf, maxUserNameLen), maxUserNameLen);
462
463 if ( !ok )
464 buf.Empty();
465
466 return buf;
467 }
468
469 wxString wxGetHostName()
470 {
471 static const size_t hostnameSize = 257;
472
473 wxString buf;
474 bool ok = wxGetHostName(wxStringBuffer(buf, hostnameSize), hostnameSize);
475
476 if ( !ok )
477 buf.Empty();
478
479 return buf;
480 }
481
482 wxString wxGetFullHostName()
483 {
484 static const size_t hostnameSize = 257;
485
486 wxString buf;
487 bool ok = wxGetFullHostName(wxStringBuffer(buf, hostnameSize), hostnameSize);
488
489 if ( !ok )
490 buf.Empty();
491
492 return buf;
493 }
494
495 wxString wxGetHomeDir()
496 {
497 wxString home;
498 wxGetHomeDir(&home);
499
500 return home;
501 }
502
503 #if 0
504
505 wxString wxGetCurrentDir()
506 {
507 wxString dir;
508 size_t len = 1024;
509 bool ok;
510 do
511 {
512 ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
513 dir.UngetWriteBuf();
514
515 if ( !ok )
516 {
517 if ( errno != ERANGE )
518 {
519 wxLogSysError(wxT("Failed to get current directory"));
520
521 return wxEmptyString;
522 }
523 else
524 {
525 // buffer was too small, retry with a larger one
526 len *= 2;
527 }
528 }
529 //else: ok
530 } while ( !ok );
531
532 return dir;
533 }
534
535 #endif // 0
536
537 // ----------------------------------------------------------------------------
538 // Environment
539 // ----------------------------------------------------------------------------
540
541 #ifdef __WXOSX__
542 #if wxOSX_USE_COCOA_OR_CARBON
543 #include <crt_externs.h>
544 #endif
545 #endif
546
547 bool wxGetEnvMap(wxEnvVariableHashMap *map)
548 {
549 wxCHECK_MSG( map, false, wxS("output pointer can't be NULL") );
550
551 #if defined(__VISUALC__)
552 // This variable only exists to force the CRT to fill the wide char array,
553 // it might only have it in narrow char version until now as we use main()
554 // (and not _wmain()) as our entry point.
555 static wxChar* s_dummyEnvVar = _tgetenv(wxT("TEMP"));
556
557 wxChar **env = _tenviron;
558 #elif defined(__VMS)
559 // Now this routine wil give false for OpenVMS
560 // TODO : should we do something with logicals?
561 char **env=NULL;
562 #elif defined(__DARWIN__)
563 #if wxOSX_USE_COCOA_OR_CARBON
564 // Under Mac shared libraries don't have access to the global environ
565 // variable so use this Mac-specific function instead as advised by
566 // environ(7) under Darwin
567 char ***penv = _NSGetEnviron();
568 if ( !penv )
569 return false;
570 char **env = *penv;
571 #else
572 char **env=NULL;
573 // todo translate NSProcessInfo environment into map
574 #endif
575 #else // non-MSVC non-Mac
576 // Not sure if other compilers have _tenviron so use the (more standard)
577 // ANSI version only for them.
578
579 // Both POSIX and Single UNIX Specification say that this variable must
580 // exist but not that it must be declared anywhere and, indeed, it's not
581 // declared in several common systems (some BSDs, Solaris with native CC)
582 // so we (re)declare it ourselves to deal with these cases. However we do
583 // not do this under MSW where there can be DLL-related complications, i.e.
584 // the variable might be DLL-imported or not. Luckily we don't have to
585 // worry about this as all MSW compilers do seem to define it in their
586 // standard headers anyhow so we can just rely on already having the
587 // correct declaration. And if this turns out to be wrong, we can always
588 // add a configure test checking whether it is declared later.
589 #ifndef __WINDOWS__
590 extern char **environ;
591 #endif // !__WINDOWS__
592
593 char **env = environ;
594 #endif
595
596 if ( env )
597 {
598 wxString name,
599 value;
600 while ( *env )
601 {
602 const wxString var(*env);
603
604 name = var.BeforeFirst(wxS('='), &value);
605
606 (*map)[name] = value;
607
608 env++;
609 }
610
611 return true;
612 }
613
614 return false;
615 }
616
617 // ----------------------------------------------------------------------------
618 // wxExecute
619 // ----------------------------------------------------------------------------
620
621 // wxDoExecuteWithCapture() helper: reads an entire stream into one array if
622 // the stream is non-NULL (it doesn't do anything if it's NULL).
623 //
624 // returns true if ok, false if error
625 #if wxUSE_STREAMS
626 static bool ReadAll(wxInputStream *is, wxArrayString& output)
627 {
628 if ( !is )
629 return true;
630
631 // the stream could be already at EOF or in wxSTREAM_BROKEN_PIPE state
632 is->Reset();
633
634 wxTextInputStream tis(*is);
635
636 for ( ;; )
637 {
638 wxString line = tis.ReadLine();
639
640 // check for EOF before other errors as it's not really an error
641 if ( is->Eof() )
642 {
643 // add the last, possibly incomplete, line
644 if ( !line.empty() )
645 output.Add(line);
646 break;
647 }
648
649 // any other error is fatal
650 if ( !*is )
651 return false;
652
653 output.Add(line);
654 }
655
656 return true;
657 }
658 #endif // wxUSE_STREAMS
659
660 // this is a private function because it hasn't a clean interface: the first
661 // array is passed by reference, the second by pointer - instead we have 2
662 // public versions of wxExecute() below
663 static long wxDoExecuteWithCapture(const wxString& command,
664 wxArrayString& output,
665 wxArrayString* error,
666 int flags,
667 const wxExecuteEnv *env)
668 {
669 // create a wxProcess which will capture the output
670 wxProcess *process = new wxProcess;
671 process->Redirect();
672
673 long rc = wxExecute(command, wxEXEC_SYNC | flags, process, env);
674
675 #if wxUSE_STREAMS
676 // Notice that while -1 indicates an error exit code for us, a program
677 // exiting with this code could still have written something to its stdout
678 // and, especially, stderr, so we still need to read from them.
679 if ( !ReadAll(process->GetInputStream(), output) )
680 rc = -1;
681
682 if ( error )
683 {
684 if ( !ReadAll(process->GetErrorStream(), *error) )
685 rc = -1;
686 }
687 #else
688 wxUnusedVar(output);
689 wxUnusedVar(error);
690 #endif // wxUSE_STREAMS/!wxUSE_STREAMS
691
692 delete process;
693
694 return rc;
695 }
696
697 long wxExecute(const wxString& command, wxArrayString& output, int flags,
698 const wxExecuteEnv *env)
699 {
700 return wxDoExecuteWithCapture(command, output, NULL, flags, env);
701 }
702
703 long wxExecute(const wxString& command,
704 wxArrayString& output,
705 wxArrayString& error,
706 int flags,
707 const wxExecuteEnv *env)
708 {
709 return wxDoExecuteWithCapture(command, output, &error, flags, env);
710 }
711
712 // ----------------------------------------------------------------------------
713 // Id functions
714 // ----------------------------------------------------------------------------
715
716 // Id generation
717 static long wxCurrentId = 100;
718
719 long wxNewId()
720 {
721 // skip the part of IDs space that contains hard-coded values:
722 if (wxCurrentId == wxID_LOWEST)
723 wxCurrentId = wxID_HIGHEST + 1;
724
725 return wxCurrentId++;
726 }
727
728 long
729 wxGetCurrentId(void) { return wxCurrentId; }
730
731 void
732 wxRegisterId (long id)
733 {
734 if (id >= wxCurrentId)
735 wxCurrentId = id + 1;
736 }
737
738 // ----------------------------------------------------------------------------
739 // wxQsort, adapted by RR to allow user_data
740 // ----------------------------------------------------------------------------
741
742 /* This file is part of the GNU C Library.
743 Written by Douglas C. Schmidt (schmidt@ics.uci.edu).
744
745 Douglas Schmidt kindly gave permission to relicence the
746 code under the wxWindows licence:
747
748 From: "Douglas C. Schmidt" <schmidt@dre.vanderbilt.edu>
749 To: Robert Roebling <robert.roebling@uni-ulm.de>
750 Subject: Re: qsort licence
751 Date: Mon, 23 Jul 2007 03:44:25 -0500
752 Sender: schmidt@dre.vanderbilt.edu
753 Message-Id: <20070723084426.64F511000A8@tango.dre.vanderbilt.edu>
754
755 Hi Robert,
756
757 > [...] I'm asking if you'd be willing to relicence your code
758 > under the wxWindows licence. [...]
759
760 That's fine with me [...]
761
762 Thanks,
763
764 Doug */
765
766
767 /* Byte-wise swap two items of size SIZE. */
768 #define SWAP(a, b, size) \
769 do \
770 { \
771 register size_t __size = (size); \
772 register char *__a = (a), *__b = (b); \
773 do \
774 { \
775 char __tmp = *__a; \
776 *__a++ = *__b; \
777 *__b++ = __tmp; \
778 } while (--__size > 0); \
779 } while (0)
780
781 /* Discontinue quicksort algorithm when partition gets below this size.
782 This particular magic number was chosen to work best on a Sun 4/260. */
783 #define MAX_THRESH 4
784
785 /* Stack node declarations used to store unfulfilled partition obligations. */
786 typedef struct
787 {
788 char *lo;
789 char *hi;
790 } stack_node;
791
792 /* The next 4 #defines implement a very fast in-line stack abstraction. */
793 #define STACK_SIZE (8 * sizeof(unsigned long int))
794 #define PUSH(low, high) ((void) ((top->lo = (low)), (top->hi = (high)), ++top))
795 #define POP(low, high) ((void) (--top, (low = top->lo), (high = top->hi)))
796 #define STACK_NOT_EMPTY (stack < top)
797
798
799 /* Order size using quicksort. This implementation incorporates
800 four optimizations discussed in Sedgewick:
801
802 1. Non-recursive, using an explicit stack of pointer that store the
803 next array partition to sort. To save time, this maximum amount
804 of space required to store an array of MAX_INT is allocated on the
805 stack. Assuming a 32-bit integer, this needs only 32 *
806 sizeof(stack_node) == 136 bits. Pretty cheap, actually.
807
808 2. Chose the pivot element using a median-of-three decision tree.
809 This reduces the probability of selecting a bad pivot value and
810 eliminates certain extraneous comparisons.
811
812 3. Only quicksorts TOTAL_ELEMS / MAX_THRESH partitions, leaving
813 insertion sort to order the MAX_THRESH items within each partition.
814 This is a big win, since insertion sort is faster for small, mostly
815 sorted array segments.
816
817 4. The larger of the two sub-partitions is always pushed onto the
818 stack first, with the algorithm then concentrating on the
819 smaller partition. This *guarantees* no more than log (n)
820 stack size is needed (actually O(1) in this case)! */
821
822 void wxQsort(void* pbase, size_t total_elems,
823 size_t size, wxSortCallback cmp, const void* user_data)
824 {
825 register char *base_ptr = (char *) pbase;
826 const size_t max_thresh = MAX_THRESH * size;
827
828 if (total_elems == 0)
829 /* Avoid lossage with unsigned arithmetic below. */
830 return;
831
832 if (total_elems > MAX_THRESH)
833 {
834 char *lo = base_ptr;
835 char *hi = &lo[size * (total_elems - 1)];
836 stack_node stack[STACK_SIZE];
837 stack_node *top = stack;
838
839 PUSH (NULL, NULL);
840
841 while (STACK_NOT_EMPTY)
842 {
843 char *left_ptr;
844 char *right_ptr;
845
846 /* Select median value from among LO, MID, and HI. Rearrange
847 LO and HI so the three values are sorted. This lowers the
848 probability of picking a pathological pivot value and
849 skips a comparison for both the LEFT_PTR and RIGHT_PTR. */
850
851 char *mid = lo + size * ((hi - lo) / size >> 1);
852
853 if ((*cmp) ((void *) mid, (void *) lo, user_data) < 0)
854 SWAP (mid, lo, size);
855 if ((*cmp) ((void *) hi, (void *) mid, user_data) < 0)
856 SWAP (mid, hi, size);
857 else
858 goto jump_over;
859 if ((*cmp) ((void *) mid, (void *) lo, user_data) < 0)
860 SWAP (mid, lo, size);
861 jump_over:;
862 left_ptr = lo + size;
863 right_ptr = hi - size;
864
865 /* Here's the famous ``collapse the walls'' section of quicksort.
866 Gotta like those tight inner loops! They are the main reason
867 that this algorithm runs much faster than others. */
868 do
869 {
870 while ((*cmp) ((void *) left_ptr, (void *) mid, user_data) < 0)
871 left_ptr += size;
872
873 while ((*cmp) ((void *) mid, (void *) right_ptr, user_data) < 0)
874 right_ptr -= size;
875
876 if (left_ptr < right_ptr)
877 {
878 SWAP (left_ptr, right_ptr, size);
879 if (mid == left_ptr)
880 mid = right_ptr;
881 else if (mid == right_ptr)
882 mid = left_ptr;
883 left_ptr += size;
884 right_ptr -= size;
885 }
886 else if (left_ptr == right_ptr)
887 {
888 left_ptr += size;
889 right_ptr -= size;
890 break;
891 }
892 }
893 while (left_ptr <= right_ptr);
894
895 /* Set up pointers for next iteration. First determine whether
896 left and right partitions are below the threshold size. If so,
897 ignore one or both. Otherwise, push the larger partition's
898 bounds on the stack and continue sorting the smaller one. */
899
900 if ((size_t) (right_ptr - lo) <= max_thresh)
901 {
902 if ((size_t) (hi - left_ptr) <= max_thresh)
903 /* Ignore both small partitions. */
904 POP (lo, hi);
905 else
906 /* Ignore small left partition. */
907 lo = left_ptr;
908 }
909 else if ((size_t) (hi - left_ptr) <= max_thresh)
910 /* Ignore small right partition. */
911 hi = right_ptr;
912 else if ((right_ptr - lo) > (hi - left_ptr))
913 {
914 /* Push larger left partition indices. */
915 PUSH (lo, right_ptr);
916 lo = left_ptr;
917 }
918 else
919 {
920 /* Push larger right partition indices. */
921 PUSH (left_ptr, hi);
922 hi = right_ptr;
923 }
924 }
925 }
926
927 /* Once the BASE_PTR array is partially sorted by quicksort the rest
928 is completely sorted using insertion sort, since this is efficient
929 for partitions below MAX_THRESH size. BASE_PTR points to the beginning
930 of the array to sort, and END_PTR points at the very last element in
931 the array (*not* one beyond it!). */
932
933 {
934 char *const end_ptr = &base_ptr[size * (total_elems - 1)];
935 char *tmp_ptr = base_ptr;
936 char *thresh = base_ptr + max_thresh;
937 if ( thresh > end_ptr )
938 thresh = end_ptr;
939 register char *run_ptr;
940
941 /* Find smallest element in first threshold and place it at the
942 array's beginning. This is the smallest array element,
943 and the operation speeds up insertion sort's inner loop. */
944
945 for (run_ptr = tmp_ptr + size; run_ptr <= thresh; run_ptr += size)
946 if ((*cmp) ((void *) run_ptr, (void *) tmp_ptr, user_data) < 0)
947 tmp_ptr = run_ptr;
948
949 if (tmp_ptr != base_ptr)
950 SWAP (tmp_ptr, base_ptr, size);
951
952 /* Insertion sort, running from left-hand-side up to right-hand-side. */
953
954 run_ptr = base_ptr + size;
955 while ((run_ptr += size) <= end_ptr)
956 {
957 tmp_ptr = run_ptr - size;
958 while ((*cmp) ((void *) run_ptr, (void *) tmp_ptr, user_data) < 0)
959 tmp_ptr -= size;
960
961 tmp_ptr += size;
962 if (tmp_ptr != run_ptr)
963 {
964 char *trav;
965
966 trav = run_ptr + size;
967 while (--trav >= run_ptr)
968 {
969 char c = *trav;
970 char *hi, *lo;
971
972 for (hi = lo = trav; (lo -= size) >= tmp_ptr; hi = lo)
973 *hi = *lo;
974 *hi = c;
975 }
976 }
977 }
978 }
979 }
980
981 #endif // wxUSE_BASE
982
983
984
985 // ============================================================================
986 // GUI-only functions from now on
987 // ============================================================================
988
989 #if wxUSE_GUI
990
991 // this function is only really implemented for X11-based ports, including GTK1
992 // (GTK2 sets detectable auto-repeat automatically anyhow)
993 #if !(defined(__WXX11__) || defined(__WXMOTIF__) || \
994 (defined(__WXGTK__) && !defined(__WXGTK20__)))
995 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
996 {
997 return true;
998 }
999 #endif // !X11-based port
1000
1001 // ----------------------------------------------------------------------------
1002 // Launch default browser
1003 // ----------------------------------------------------------------------------
1004
1005 #if defined(__WINDOWS__)
1006
1007 // implemented in a port-specific utils source file:
1008 bool wxDoLaunchDefaultBrowser(const wxString& url, const wxString& scheme, int flags);
1009
1010 #elif defined(__WXX11__) || defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXCOCOA__) || \
1011 (defined(__WXOSX__) )
1012
1013 // implemented in a port-specific utils source file:
1014 bool wxDoLaunchDefaultBrowser(const wxString& url, int flags);
1015
1016 #else
1017
1018 // a "generic" implementation:
1019 bool wxDoLaunchDefaultBrowser(const wxString& url, int flags)
1020 {
1021 // on other platforms try to use mime types or wxExecute...
1022
1023 bool ok = false;
1024 wxString cmd;
1025
1026 #if wxUSE_MIMETYPE
1027 wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(wxT("html"));
1028 if ( ft )
1029 {
1030 wxString mt;
1031 ft->GetMimeType(&mt);
1032
1033 ok = ft->GetOpenCommand(&cmd, wxFileType::MessageParameters(url));
1034 delete ft;
1035 }
1036 #endif // wxUSE_MIMETYPE
1037
1038 if ( !ok || cmd.empty() )
1039 {
1040 // fallback to checking for the BROWSER environment variable
1041 if ( !wxGetEnv(wxT("BROWSER"), &cmd) || cmd.empty() )
1042 cmd << wxT(' ') << url;
1043 }
1044
1045 ok = ( !cmd.empty() && wxExecute(cmd) );
1046 if (ok)
1047 return ok;
1048
1049 // no file type for HTML extension
1050 wxLogError(_("No default application configured for HTML files."));
1051
1052 return false;
1053 }
1054 #endif
1055
1056 static bool DoLaunchDefaultBrowserHelper(const wxString& urlOrig, int flags)
1057 {
1058 // NOTE: we don't have to care about the wxBROWSER_NOBUSYCURSOR flag
1059 // as it was already handled by wxLaunchDefaultBrowser
1060
1061 wxUnusedVar(flags);
1062
1063 wxString url(urlOrig), scheme;
1064 wxURI uri(url);
1065
1066 // this check is useful to avoid that wxURI recognizes as scheme parts of
1067 // the filename, in case urlOrig is a local filename
1068 // (e.g. "C:\\test.txt" when parsed by wxURI reports a scheme == "C")
1069 bool hasValidScheme = uri.HasScheme() && uri.GetScheme().length() > 1;
1070
1071 #if defined(__WINDOWS__)
1072
1073 // NOTE: when testing wxMSW's wxLaunchDefaultBrowser all possible forms
1074 // of the URL/flags should be tested; e.g.:
1075 //
1076 // for (int i=0; i<2; i++)
1077 // {
1078 // // test arguments without a valid URL scheme:
1079 // wxLaunchDefaultBrowser("C:\\test.txt", i==0 ? 0 : wxBROWSER_NEW_WINDOW);
1080 // wxLaunchDefaultBrowser("wxwidgets.org", i==0 ? 0 : wxBROWSER_NEW_WINDOW);
1081 //
1082 // // test arguments with different valid schemes:
1083 // wxLaunchDefaultBrowser("file:/C%3A/test.txt", i==0 ? 0 : wxBROWSER_NEW_WINDOW);
1084 // wxLaunchDefaultBrowser("http://wxwidgets.org", i==0 ? 0 : wxBROWSER_NEW_WINDOW);
1085 // wxLaunchDefaultBrowser("mailto:user@host.org", i==0 ? 0 : wxBROWSER_NEW_WINDOW);
1086 // }
1087 // (assuming you have a C:\test.txt file)
1088
1089 if ( !hasValidScheme )
1090 {
1091 if (wxFileExists(urlOrig) || wxDirExists(urlOrig))
1092 {
1093 scheme = "file";
1094 // do not prepend the file scheme to the URL as ShellExecuteEx() doesn't like it
1095 }
1096 else
1097 {
1098 url.Prepend(wxS("http://"));
1099 scheme = "http";
1100 }
1101 }
1102 else if ( hasValidScheme )
1103 {
1104 scheme = uri.GetScheme();
1105
1106 if ( uri.GetScheme() == "file" )
1107 {
1108 // TODO: extract URLToFileName() to some always compiled in
1109 // function
1110 #if wxUSE_FILESYSTEM
1111 // ShellExecuteEx() doesn't like the "file" scheme when opening local files;
1112 // remove it
1113 url = wxFileSystem::URLToFileName(url).GetFullPath();
1114 #endif // wxUSE_FILESYSTEM
1115 }
1116 }
1117
1118 if (wxDoLaunchDefaultBrowser(url, scheme, flags))
1119 return true;
1120 //else: call wxLogSysError
1121 #else
1122 if ( !hasValidScheme )
1123 {
1124 // set the scheme of url to "http" or "file" if it does not have one
1125 if (wxFileExists(urlOrig) || wxDirExists(urlOrig))
1126 url.Prepend(wxS("file://"));
1127 else
1128 url.Prepend(wxS("http://"));
1129 }
1130
1131 if (wxDoLaunchDefaultBrowser(url, flags))
1132 return true;
1133 //else: call wxLogSysError
1134 #endif
1135
1136 wxLogSysError(_("Failed to open URL \"%s\" in default browser."),
1137 url.c_str());
1138
1139 return false;
1140 }
1141
1142 bool wxLaunchDefaultBrowser(const wxString& url, int flags)
1143 {
1144 // NOTE: as documented, "url" may be both a real well-formed URL
1145 // and a local file name
1146
1147 if ( flags & wxBROWSER_NOBUSYCURSOR )
1148 return DoLaunchDefaultBrowserHelper(url, flags);
1149
1150 wxBusyCursor bc;
1151 return DoLaunchDefaultBrowserHelper(url, flags);
1152 }
1153
1154 // ----------------------------------------------------------------------------
1155 // Menu accelerators related functions
1156 // ----------------------------------------------------------------------------
1157
1158 #if WXWIN_COMPATIBILITY_2_6
1159 wxChar *wxStripMenuCodes(const wxChar *in, wxChar *out)
1160 {
1161 #if wxUSE_MENUS
1162 wxString s = wxMenuItem::GetLabelText(in);
1163 #else
1164 wxString str(in);
1165 wxString s = wxStripMenuCodes(str);
1166 #endif // wxUSE_MENUS
1167 if ( out )
1168 {
1169 // go smash their buffer if it's not big enough - I love char * params
1170 memcpy(out, s.c_str(), s.length() * sizeof(wxChar));
1171 }
1172 else
1173 {
1174 out = new wxChar[s.length() + 1];
1175 wxStrcpy(out, s.c_str());
1176 }
1177
1178 return out;
1179 }
1180 #endif
1181
1182 wxString wxStripMenuCodes(const wxString& in, int flags)
1183 {
1184 wxASSERT_MSG( flags, wxT("this is useless to call without any flags") );
1185
1186 wxString out;
1187
1188 size_t len = in.length();
1189 out.reserve(len);
1190
1191 for ( wxString::const_iterator it = in.begin(); it != in.end(); ++it )
1192 {
1193 wxChar ch = *it;
1194 if ( (flags & wxStrip_Mnemonics) && ch == wxT('&') )
1195 {
1196 // skip it, it is used to introduce the accel char (or to quote
1197 // itself in which case it should still be skipped): note that it
1198 // can't be the last character of the string
1199 if ( ++it == in.end() )
1200 {
1201 wxLogDebug(wxT("Invalid menu string '%s'"), in.c_str());
1202 }
1203 else
1204 {
1205 // use the next char instead
1206 ch = *it;
1207 }
1208 }
1209 else if ( (flags & wxStrip_Accel) && ch == wxT('\t') )
1210 {
1211 // everything after TAB is accel string, exit the loop
1212 break;
1213 }
1214
1215 out += ch;
1216 }
1217
1218 return out;
1219 }
1220
1221 // ----------------------------------------------------------------------------
1222 // Window search functions
1223 // ----------------------------------------------------------------------------
1224
1225 /*
1226 * If parent is non-NULL, look through children for a label or title
1227 * matching the specified string. If NULL, look through all top-level windows.
1228 *
1229 */
1230
1231 wxWindow *
1232 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
1233 {
1234 return wxWindow::FindWindowByLabel( title, parent );
1235 }
1236
1237
1238 /*
1239 * If parent is non-NULL, look through children for a name
1240 * matching the specified string. If NULL, look through all top-level windows.
1241 *
1242 */
1243
1244 wxWindow *
1245 wxFindWindowByName (const wxString& name, wxWindow * parent)
1246 {
1247 return wxWindow::FindWindowByName( name, parent );
1248 }
1249
1250 // Returns menu item id or wxNOT_FOUND if none.
1251 int
1252 wxFindMenuItemId(wxFrame *frame,
1253 const wxString& menuString,
1254 const wxString& itemString)
1255 {
1256 #if wxUSE_MENUS
1257 wxMenuBar *menuBar = frame->GetMenuBar ();
1258 if ( menuBar )
1259 return menuBar->FindMenuItem (menuString, itemString);
1260 #else // !wxUSE_MENUS
1261 wxUnusedVar(frame);
1262 wxUnusedVar(menuString);
1263 wxUnusedVar(itemString);
1264 #endif // wxUSE_MENUS/!wxUSE_MENUS
1265
1266 return wxNOT_FOUND;
1267 }
1268
1269 // Try to find the deepest child that contains 'pt'.
1270 // We go backwards, to try to allow for controls that are spacially
1271 // within other controls, but are still siblings (e.g. buttons within
1272 // static boxes). Static boxes are likely to be created _before_ controls
1273 // that sit inside them.
1274 wxWindow* wxFindWindowAtPoint(wxWindow* win, const wxPoint& pt)
1275 {
1276 if (!win->IsShown())
1277 return NULL;
1278
1279 // Hack for wxNotebook case: at least in wxGTK, all pages
1280 // claim to be shown, so we must only deal with the selected one.
1281 #if wxUSE_NOTEBOOK
1282 if (wxDynamicCast(win, wxNotebook))
1283 {
1284 wxNotebook* nb = (wxNotebook*) win;
1285 int sel = nb->GetSelection();
1286 if (sel >= 0)
1287 {
1288 wxWindow* child = nb->GetPage(sel);
1289 wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
1290 if (foundWin)
1291 return foundWin;
1292 }
1293 }
1294 #endif
1295
1296 wxWindowList::compatibility_iterator node = win->GetChildren().GetLast();
1297 while (node)
1298 {
1299 wxWindow* child = node->GetData();
1300 wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
1301 if (foundWin)
1302 return foundWin;
1303 node = node->GetPrevious();
1304 }
1305
1306 wxPoint pos = win->GetPosition();
1307 wxSize sz = win->GetSize();
1308 if ( !win->IsTopLevel() && win->GetParent() )
1309 {
1310 pos = win->GetParent()->ClientToScreen(pos);
1311 }
1312
1313 wxRect rect(pos, sz);
1314 if (rect.Contains(pt))
1315 return win;
1316
1317 return NULL;
1318 }
1319
1320 wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt)
1321 {
1322 // Go backwards through the list since windows
1323 // on top are likely to have been appended most
1324 // recently.
1325 wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetLast();
1326 while (node)
1327 {
1328 wxWindow* win = node->GetData();
1329 wxWindow* found = wxFindWindowAtPoint(win, pt);
1330 if (found)
1331 return found;
1332 node = node->GetPrevious();
1333 }
1334 return NULL;
1335 }
1336
1337 // ----------------------------------------------------------------------------
1338 // GUI helpers
1339 // ----------------------------------------------------------------------------
1340
1341 /*
1342 * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
1343 * since otherwise the generic code may be pulled in unnecessarily.
1344 */
1345
1346 #if wxUSE_MSGDLG
1347
1348 int wxMessageBox(const wxString& message, const wxString& caption, long style,
1349 wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
1350 {
1351 // add the appropriate icon unless this was explicitly disabled by use of
1352 // wxICON_NONE
1353 if ( !(style & wxICON_NONE) && !(style & wxICON_MASK) )
1354 {
1355 style |= style & wxYES ? wxICON_QUESTION : wxICON_INFORMATION;
1356 }
1357
1358 wxMessageDialog dialog(parent, message, caption, style);
1359
1360 int ans = dialog.ShowModal();
1361 switch ( ans )
1362 {
1363 case wxID_OK:
1364 return wxOK;
1365 case wxID_YES:
1366 return wxYES;
1367 case wxID_NO:
1368 return wxNO;
1369 case wxID_CANCEL:
1370 return wxCANCEL;
1371 case wxID_HELP:
1372 return wxHELP;
1373 }
1374
1375 wxFAIL_MSG( wxT("unexpected return code from wxMessageDialog") );
1376
1377 return wxCANCEL;
1378 }
1379
1380 wxVersionInfo wxGetLibraryVersionInfo()
1381 {
1382 // don't translate these strings, they're for diagnostics purposes only
1383 wxString msg;
1384 msg.Printf(wxS("wxWidgets Library (%s port)\n")
1385 wxS("Version %d.%d.%d (Unicode: %s, debug level: %d),\n")
1386 wxS("compiled at %s %s\n\n")
1387 wxS("Runtime version of toolkit used is %d.%d.\n"),
1388 wxPlatformInfo::Get().GetPortIdName(),
1389 wxMAJOR_VERSION,
1390 wxMINOR_VERSION,
1391 wxRELEASE_NUMBER,
1392 #if wxUSE_UNICODE_UTF8
1393 "UTF-8",
1394 #elif wxUSE_UNICODE
1395 "wchar_t",
1396 #else
1397 "none",
1398 #endif
1399 wxDEBUG_LEVEL,
1400 __TDATE__,
1401 __TTIME__,
1402 wxPlatformInfo::Get().GetToolkitMajorVersion(),
1403 wxPlatformInfo::Get().GetToolkitMinorVersion()
1404 );
1405
1406 #ifdef __WXGTK__
1407 msg += wxString::Format("Compile-time GTK+ version is %d.%d.%d.\n",
1408 GTK_MAJOR_VERSION,
1409 GTK_MINOR_VERSION,
1410 GTK_MICRO_VERSION);
1411 #endif // __WXGTK__
1412
1413 return wxVersionInfo(wxS("wxWidgets"),
1414 wxMAJOR_VERSION,
1415 wxMINOR_VERSION,
1416 wxRELEASE_NUMBER,
1417 msg,
1418 wxS("Copyright (c) 1995-2011 wxWidgets team"));
1419 }
1420
1421 void wxInfoMessageBox(wxWindow* parent)
1422 {
1423 wxVersionInfo info = wxGetLibraryVersionInfo();
1424 wxString msg = info.ToString();
1425
1426 msg << wxS("\n") << info.GetCopyright();
1427
1428 wxMessageBox(msg, wxT("wxWidgets information"),
1429 wxICON_INFORMATION | wxOK,
1430 parent);
1431 }
1432
1433 #endif // wxUSE_MSGDLG
1434
1435 #if wxUSE_TEXTDLG
1436
1437 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
1438 const wxString& defaultValue, wxWindow *parent,
1439 wxCoord x, wxCoord y, bool centre )
1440 {
1441 wxString str;
1442 long style = wxTextEntryDialogStyle;
1443
1444 if (centre)
1445 style |= wxCENTRE;
1446 else
1447 style &= ~wxCENTRE;
1448
1449 wxTextEntryDialog dialog(parent, message, caption, defaultValue, style, wxPoint(x, y));
1450
1451 if (dialog.ShowModal() == wxID_OK)
1452 {
1453 str = dialog.GetValue();
1454 }
1455
1456 return str;
1457 }
1458
1459 wxString wxGetPasswordFromUser(const wxString& message,
1460 const wxString& caption,
1461 const wxString& defaultValue,
1462 wxWindow *parent,
1463 wxCoord x, wxCoord y, bool centre )
1464 {
1465 wxString str;
1466 long style = wxTextEntryDialogStyle;
1467
1468 if (centre)
1469 style |= wxCENTRE;
1470 else
1471 style &= ~wxCENTRE;
1472
1473 wxPasswordEntryDialog dialog(parent, message, caption, defaultValue,
1474 style, wxPoint(x, y));
1475 if ( dialog.ShowModal() == wxID_OK )
1476 {
1477 str = dialog.GetValue();
1478 }
1479
1480 return str;
1481 }
1482
1483 #endif // wxUSE_TEXTDLG
1484
1485 // ----------------------------------------------------------------------------
1486 // wxSafeYield and supporting functions
1487 // ----------------------------------------------------------------------------
1488
1489 void wxEnableTopLevelWindows(bool enable)
1490 {
1491 wxWindowList::compatibility_iterator node;
1492 for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1493 node->GetData()->Enable(enable);
1494 }
1495
1496 #if defined(__WXOSX__) && wxOSX_USE_COCOA
1497
1498 // defined in evtloop.mm
1499
1500 #else
1501
1502 wxWindowDisabler::wxWindowDisabler(bool disable)
1503 {
1504 m_disabled = disable;
1505 if ( disable )
1506 DoDisable();
1507 }
1508
1509 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
1510 {
1511 m_disabled = true;
1512 DoDisable(winToSkip);
1513 }
1514
1515 void wxWindowDisabler::DoDisable(wxWindow *winToSkip)
1516 {
1517 // remember the top level windows which were already disabled, so that we
1518 // don't reenable them later
1519 m_winDisabled = NULL;
1520
1521 wxWindowList::compatibility_iterator node;
1522 for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1523 {
1524 wxWindow *winTop = node->GetData();
1525 if ( winTop == winToSkip )
1526 continue;
1527
1528 // we don't need to disable the hidden or already disabled windows
1529 if ( winTop->IsEnabled() && winTop->IsShown() )
1530 {
1531 winTop->Disable();
1532 }
1533 else
1534 {
1535 if ( !m_winDisabled )
1536 {
1537 m_winDisabled = new wxWindowList;
1538 }
1539
1540 m_winDisabled->Append(winTop);
1541 }
1542 }
1543 }
1544
1545 wxWindowDisabler::~wxWindowDisabler()
1546 {
1547 if ( !m_disabled )
1548 return;
1549
1550 wxWindowList::compatibility_iterator node;
1551 for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1552 {
1553 wxWindow *winTop = node->GetData();
1554 if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
1555 {
1556 winTop->Enable();
1557 }
1558 //else: had been already disabled, don't reenable
1559 }
1560
1561 delete m_winDisabled;
1562 }
1563
1564 #endif
1565
1566 // Yield to other apps/messages and disable user input to all windows except
1567 // the given one
1568 bool wxSafeYield(wxWindow *win, bool onlyIfNeeded)
1569 {
1570 wxWindowDisabler wd(win);
1571
1572 bool rc;
1573 if (onlyIfNeeded)
1574 rc = wxYieldIfNeeded();
1575 else
1576 rc = wxYield();
1577
1578 return rc;
1579 }
1580
1581 // ----------------------------------------------------------------------------
1582 // wxApp::Yield() wrappers for backwards compatibility
1583 // ----------------------------------------------------------------------------
1584
1585 bool wxYield()
1586 {
1587 return wxTheApp && wxTheApp->Yield();
1588 }
1589
1590 bool wxYieldIfNeeded()
1591 {
1592 return wxTheApp && wxTheApp->Yield(true);
1593 }
1594
1595 #endif // wxUSE_GUI
wxWidgets (Impactor)