wxPython/src/helpers.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        helpers.cpp
   3 // Purpose:     Helper functions/classes for the wxPython extension module
   4 //
   5 // Author:      Robin Dunn
   6 //
   7 // Created:     1-July-1997
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 1998 by Total Control Software
  10 // Licence:     wxWindows license
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13
  14 #undef DEBUG
  15 #include <Python.h>
  16 #include "wx/wxPython/wxPython_int.h"
  17 #include "wx/wxPython/pyistream.h"
  18
  19 #ifdef __WXMSW__
  20 #include <wx/msw/private.h>
  21 #include <wx/msw/winundef.h>
  22 #include <wx/msw/msvcrt.h>
  23 #endif
  24
  25 #ifdef __WXGTK__
  26 #include <gdk/gdk.h>
  27 #include <gdk/gdkx.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkprivate.h>
  30 #include <wx/gtk/win_gtk.h>
  31 #define GetXWindow(wxwin)   GDK_WINDOW_XWINDOW((wxwin)->m_widget->window)
  32 #include <locale.h>
  33 #endif
  34
  35 #ifdef __WXX11__
  36 #include "wx/x11/privx.h"
  37 #define GetXWindow(wxwin)   ((Window)(wxwin)->GetHandle())
  38 #endif
  39
  40 #ifdef __WXMAC__
  41 #include <wx/mac/private.h>
  42 #endif
  43
  44 #include <wx/clipbrd.h>
  45 #include <wx/mimetype.h>
  46 #include <wx/image.h>
  47
  48 //----------------------------------------------------------------------
  49
  50 #if PYTHON_API_VERSION <= 1007 && wxUSE_UNICODE
  51 #error Python must support Unicode to use wxWindows Unicode
  52 #endif
  53
  54 //----------------------------------------------------------------------
  55
  56 wxPyApp* wxPythonApp = NULL;  // Global instance of application object
  57 bool wxPyDoCleanup = False;
  58 bool wxPyDoingCleanup = False;
  59
  60
  61 #ifdef WXP_WITH_THREAD
  62 struct wxPyThreadState {
  63     unsigned long  tid;
  64     PyThreadState* tstate;
  65
  66     wxPyThreadState(unsigned long _tid=0, PyThreadState* _tstate=NULL)
  67         : tid(_tid), tstate(_tstate) {}
  68 };
  69
  70 #include <wx/dynarray.h>
  71 WX_DECLARE_OBJARRAY(wxPyThreadState, wxPyThreadStateArray);
  72 #include <wx/arrimpl.cpp>
  73 WX_DEFINE_OBJARRAY(wxPyThreadStateArray);
  74
  75 wxPyThreadStateArray* wxPyTStates = NULL;
  76 wxMutex*              wxPyTMutex = NULL;
  77 #endif
  78
  79
  80 static PyObject* wxPython_dict = NULL;
  81 static PyObject* wxPyAssertionError = NULL;
  82 static PyObject* wxPyNoAppError = NULL;
  83
  84 PyObject* wxPyPtrTypeMap = NULL;
  85
  86
  87 #ifdef __WXMSW__             // If building for win32...
  88 //----------------------------------------------------------------------
  89 // This gets run when the DLL is loaded.  We just need to save a handle.
  90 //----------------------------------------------------------------------
  91
  92 BOOL WINAPI DllMain(
  93     HINSTANCE   hinstDLL,    // handle to DLL module
  94     DWORD       fdwReason,   // reason for calling function
  95     LPVOID      lpvReserved  // reserved
  96    )
  97 {
  98     // If wxPython is embedded in another wxWindows app then
  99     // the inatance has already been set.
 100     if (! wxGetInstance())
 101         wxSetInstance(hinstDLL);
 102     return True;
 103 }
 104 #endif
 105
 106 //----------------------------------------------------------------------
 107 // Classes for implementing the wxp main application shell.
 108 //----------------------------------------------------------------------
 109
 110 IMPLEMENT_ABSTRACT_CLASS(wxPyApp, wxApp);
 111
 112
 113 wxPyApp::wxPyApp() {
 114     m_assertMode = wxPYAPP_ASSERT_EXCEPTION;
 115     m_startupComplete = False;
 116 }
 117
 118
 119 wxPyApp::~wxPyApp() {
 120 }
 121
 122
 123 // This one isn't acutally called...  We fake it with _BootstrapApp
 124 bool wxPyApp::OnInit() {
 125     return False;
 126 }
 127
 128
 129 int  wxPyApp::MainLoop() {
 130     int retval = 0;
 131
 132     DeletePendingObjects();
 133     bool initialized = wxTopLevelWindows.GetCount() != 0;
 134     if (initialized) {
 135         if ( m_exitOnFrameDelete == Later ) {
 136             m_exitOnFrameDelete = Yes;
 137         }
 138
 139         retval = wxApp::MainLoop();
 140         OnExit();
 141     }
 142     return retval;
 143 }
 144
 145
 146 bool wxPyApp::OnInitGui() {
 147     bool rval=True;
 148     wxApp::OnInitGui();  // in this case always call the base class version
 149     bool blocked = wxPyBeginBlockThreads();
 150     if (wxPyCBH_findCallback(m_myInst, "OnInitGui"))
 151         rval = wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
 152     wxPyEndBlockThreads(blocked);
 153     return rval;
 154 }
 155
 156
 157 int wxPyApp::OnExit() {
 158     int rval=0;
 159     bool blocked = wxPyBeginBlockThreads();
 160     if (wxPyCBH_findCallback(m_myInst, "OnExit"))
 161         rval = wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
 162     wxPyEndBlockThreads(blocked);
 163     wxApp::OnExit();  // in this case always call the base class version
 164     return rval;
 165 }
 166
 167
 168 #ifdef __WXDEBUG__
 169 void wxPyApp::OnAssert(const wxChar *file,
 170                      int line,
 171                      const wxChar *cond,
 172                      const wxChar *msg) {
 173
 174     // if we're not fully initialized then just log the error
 175     if (! m_startupComplete) {
 176         wxString buf;
 177         buf.Alloc(4096);
 178         buf.Printf(wxT("%s(%d): assert \"%s\" failed"),
 179                    file, line, cond);
 180         if (msg != NULL) {
 181             buf += wxT(": ");
 182             buf += msg;
 183         }
 184         wxLogDebug(buf);
 185         return;
 186     }
 187
 188     // If the OnAssert is overloaded in the Python class then call it...
 189     bool found;
 190     bool blocked = wxPyBeginBlockThreads();
 191     if ((found = wxPyCBH_findCallback(m_myInst, "OnAssert"))) {
 192         PyObject* fso = wx2PyString(file);
 193         PyObject* cso = wx2PyString(file);
 194         PyObject* mso;
 195         if (msg != NULL)
 196             mso = wx2PyString(file);
 197         else {
 198             mso = Py_None; Py_INCREF(Py_None);
 199         }
 200         wxPyCBH_callCallback(m_myInst, Py_BuildValue("(OiOO)", fso, line, cso, mso));
 201         Py_DECREF(fso);
 202         Py_DECREF(cso);
 203         Py_DECREF(mso);
 204     }
 205     wxPyEndBlockThreads(blocked);
 206
 207     // ...otherwise do our own thing with it
 208     if (! found) {
 209         // ignore it?
 210         if (m_assertMode & wxPYAPP_ASSERT_SUPPRESS)
 211             return;
 212
 213         // turn it into a Python exception?
 214         if (m_assertMode & wxPYAPP_ASSERT_EXCEPTION) {
 215             wxString buf;
 216             buf.Alloc(4096);
 217             buf.Printf(wxT("C++ assertion \"%s\" failed in %s(%d)"), cond, file, line);
 218             if (msg != NULL) {
 219                 buf += wxT(": ");
 220                 buf += msg;
 221             }
 222
 223             // set the exception
 224             bool blocked = wxPyBeginBlockThreads();
 225             PyObject* s = wx2PyString(buf);
 226             PyErr_SetObject(wxPyAssertionError, s);
 227             Py_DECREF(s);
 228             wxPyEndBlockThreads(blocked);
 229
 230             // Now when control returns to whatever API wrapper was called from
 231             // Python it should detect that an exception is set and will return
 232             // NULL, signalling the exception to Python.
 233         }
 234
 235         // Send it to the normal log destination, but only if
 236         // not _DIALOG because it will call this too
 237         if ( (m_assertMode & wxPYAPP_ASSERT_LOG) && !(m_assertMode & wxPYAPP_ASSERT_DIALOG)) {
 238             wxString buf;
 239             buf.Alloc(4096);
 240             buf.Printf(wxT("%s(%d): assert \"%s\" failed"),
 241                        file, line, cond);
 242             if (msg != NULL) {
 243                 buf += wxT(": ");
 244                 buf += msg;
 245             }
 246             wxLogDebug(buf);
 247         }
 248
 249         // do the normal wx assert dialog?
 250         if (m_assertMode & wxPYAPP_ASSERT_DIALOG)
 251             wxApp::OnAssert(file, line, cond, msg);
 252     }
 253 }
 254 #endif
 255
 256     // For catching Apple Events
 257 void wxPyApp::MacOpenFile(const wxString &fileName)
 258 {
 259     bool blocked = wxPyBeginBlockThreads();
 260     if (wxPyCBH_findCallback(m_myInst, "MacOpenFile")) {
 261         PyObject* s = wx2PyString(fileName);
 262         wxPyCBH_callCallback(m_myInst, Py_BuildValue("(O)", s));
 263         Py_DECREF(s);
 264     }
 265     wxPyEndBlockThreads(blocked);
 266 }
 267
 268 void wxPyApp::MacPrintFile(const wxString &fileName)
 269 {
 270     bool blocked = wxPyBeginBlockThreads();
 271     if (wxPyCBH_findCallback(m_myInst, "MacPrintFile")) {
 272         PyObject* s = wx2PyString(fileName);
 273         wxPyCBH_callCallback(m_myInst, Py_BuildValue("(O)", s));
 274         Py_DECREF(s);
 275     }
 276     wxPyEndBlockThreads(blocked);
 277 }
 278
 279 void wxPyApp::MacNewFile()
 280 {
 281     bool blocked = wxPyBeginBlockThreads();
 282     if (wxPyCBH_findCallback(m_myInst, "MacNewFile"))
 283         wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
 284     wxPyEndBlockThreads(blocked);
 285 }
 286
 287 void wxPyApp::MacReopenApp()
 288 {
 289     bool blocked = wxPyBeginBlockThreads();
 290     if (wxPyCBH_findCallback(m_myInst, "MacReopenApp"))
 291         wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
 292     wxPyEndBlockThreads(blocked);
 293 }
 294
 295
 296 /*static*/
 297 bool wxPyApp::GetMacSupportPCMenuShortcuts() {
 298 #ifdef __WXMAC__
 299     return s_macSupportPCMenuShortcuts;
 300 #else
 301     return 0;
 302 #endif
 303 }
 304
 305 /*static*/
 306 long wxPyApp::GetMacAboutMenuItemId() {
 307 #ifdef __WXMAC__
 308     return s_macAboutMenuItemId;
 309 #else
 310     return 0;
 311 #endif
 312 }
 313
 314 /*static*/
 315 long wxPyApp::GetMacPreferencesMenuItemId() {
 316 #ifdef __WXMAC__
 317     return s_macPreferencesMenuItemId;
 318 #else
 319     return 0;
 320 #endif
 321 }
 322
 323 /*static*/
 324 long wxPyApp::GetMacExitMenuItemId() {
 325 #ifdef __WXMAC__
 326     return s_macExitMenuItemId;
 327 #else
 328     return 0;
 329 #endif
 330 }
 331
 332 /*static*/
 333 wxString wxPyApp::GetMacHelpMenuTitleName() {
 334 #ifdef __WXMAC__
 335     return s_macHelpMenuTitleName;
 336 #else
 337     return wxEmptyString;
 338 #endif
 339 }
 340
 341 /*static*/
 342 void wxPyApp::SetMacSupportPCMenuShortcuts(bool val) {
 343 #ifdef __WXMAC__
 344     s_macSupportPCMenuShortcuts = val;
 345 #endif
 346 }
 347
 348 /*static*/
 349 void wxPyApp::SetMacAboutMenuItemId(long val) {
 350 #ifdef __WXMAC__
 351     s_macAboutMenuItemId = val;
 352 #endif
 353 }
 354
 355 /*static*/
 356 void wxPyApp::SetMacPreferencesMenuItemId(long val) {
 357 #ifdef __WXMAC__
 358     s_macPreferencesMenuItemId = val;
 359 #endif
 360 }
 361
 362 /*static*/
 363 void wxPyApp::SetMacExitMenuItemId(long val) {
 364 #ifdef __WXMAC__
 365     s_macExitMenuItemId = val;
 366 #endif
 367 }
 368
 369 /*static*/
 370 void wxPyApp::SetMacHelpMenuTitleName(const wxString& val) {
 371 #ifdef __WXMAC__
 372     s_macHelpMenuTitleName = val;
 373 #endif
 374 }
 375
 376
 377 // This finishes the initialization of wxWindows and then calls the OnInit
 378 // that should be present in the derived (Python) class.
 379 void wxPyApp::_BootstrapApp()
 380 {
 381     bool        result;
 382     PyObject*   retval = NULL;
 383     PyObject*   pyint  = NULL;
 384
 385
 386     // Get any command-line args passed to this program from the sys module
 387     int    argc = 0;
 388     char** argv = NULL;
 389     bool blocked = wxPyBeginBlockThreads();
 390     PyObject* sysargv = PySys_GetObject("argv");
 391     if (sysargv != NULL) {
 392         argc = PyList_Size(sysargv);
 393         argv = new char*[argc+1];
 394         int x;
 395         for(x=0; x<argc; x++) {
 396             PyObject *pyArg = PyList_GetItem(sysargv, x);
 397             argv[x] = PyString_AsString(pyArg);
 398         }
 399         argv[argc] = NULL;
 400     }
 401     wxPyEndBlockThreads(blocked);
 402
 403     // Initialize wxWidgets
 404     result = wxEntryStart(argc, argv);
 405     delete [] argv;
 406
 407     blocked = wxPyBeginBlockThreads();
 408     if (! result)  {
 409         PyErr_SetString(PyExc_SystemError,
 410                         "wxEntryStart failed, unable to initialize wxWidgets!"
 411 #ifdef __WXGTK__
 412                         "  (Is DISPLAY set properly?)"
 413 #endif
 414             );
 415         goto error;
 416     }
 417
 418     // On wxGTK the locale will be changed to match the system settings, but
 419     // Python needs to have LC_NUMERIC set to "C" in order for the floating
 420     // point conversions and such to work right.
 421 #ifdef __WXGTK__
 422     setlocale(LC_NUMERIC, "C");
 423 #endif
 424
 425     // The stock objects were all NULL when they were loaded into
 426     // SWIG generated proxies, so re-init those now...
 427     wxPy_ReinitStockObjects(3);
 428
 429     // It's now ok to generate exceptions for assertion errors.
 430     wxPythonApp->SetStartupComplete(True);
 431
 432     // Call the Python wxApp's OnInit function
 433     if (wxPyCBH_findCallback(m_myInst, "OnInit")) {
 434
 435         PyObject* method = m_myInst.GetLastFound();
 436         PyObject* argTuple = PyTuple_New(0);
 437         retval = PyEval_CallObject(method, argTuple);
 438         Py_DECREF(argTuple);
 439         Py_DECREF(method);
 440         if (retval == NULL)
 441             goto error;
 442
 443         pyint = PyNumber_Int(retval);
 444         if (! pyint) {
 445             PyErr_SetString(PyExc_TypeError, "OnInit should return a boolean value");
 446             goto error;
 447         }
 448         result = PyInt_AS_LONG(pyint);
 449     }
 450     else {
 451         // Is it okay if there is no OnInit?  Probably so...
 452         result = True;
 453     }
 454
 455     if (! result) {
 456         PyErr_SetString(PyExc_SystemExit, "OnInit returned False, exiting...");
 457     }
 458
 459  error:
 460     Py_XDECREF(retval);
 461     Py_XDECREF(pyint);
 462
 463     wxPyEndBlockThreads(blocked);
 464 };
 465
 466 //---------------------------------------------------------------------
 467 //----------------------------------------------------------------------
 468
 469
 470 #if 0
 471 static char* wxPyCopyCString(const wxChar* src)
 472 {
 473     wxWX2MBbuf buff = (wxWX2MBbuf)wxConvCurrent->cWX2MB(src);
 474     size_t len = strlen(buff);
 475     char*  dest = new char[len+1];
 476     strcpy(dest, buff);
 477     return dest;
 478 }
 479
 480 #if wxUSE_UNICODE
 481 static char* wxPyCopyCString(const char* src)   // we need a char version too
 482 {
 483     size_t len = strlen(src);
 484     char*  dest = new char[len+1];
 485     strcpy(dest, src);
 486     return dest;
 487 }
 488 #endif
 489
 490 static wxChar* wxPyCopyWString(const char *src)
 491 {
 492     //wxMB2WXbuf buff = wxConvCurrent->cMB2WX(src);
 493     wxString str(src, *wxConvCurrent);
 494     return copystring(str);
 495 }
 496
 497 #if wxUSE_UNICODE
 498 static wxChar* wxPyCopyWString(const wxChar *src)
 499 {
 500     return copystring(src);
 501 }
 502 #endif
 503 #endif
 504
 505
 506 inline const char* dropwx(const char* name) {
 507     if (name[0] == 'w' && name[1] == 'x')
 508         return name+2;
 509     else
 510         return name;
 511 }
 512
 513 //----------------------------------------------------------------------
 514
 515 // This function is called when the wx._core_ module is imported to do some
 516 // initial setup.  (Before there is a wxApp object.)  The rest happens in
 517 // wxPyApp::_BootstrapApp
 518 void __wxPyPreStart(PyObject* moduleDict)
 519 {
 520
 521 #ifdef __WXMSW__
 522 //     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF
 523 //                     | _CRTDBG_CHECK_ALWAYS_DF
 524 //                     | _CRTDBG_DELAY_FREE_MEM_DF
 525 //         );
 526 #endif
 527
 528 #ifdef WXP_WITH_THREAD
 529     PyEval_InitThreads();
 530     wxPyTStates = new wxPyThreadStateArray;
 531     wxPyTMutex = new wxMutex;
 532
 533     // Save the current (main) thread state in our array
 534     PyThreadState* tstate = wxPyBeginAllowThreads();
 535     wxPyEndAllowThreads(tstate);
 536 #endif
 537
 538     // Ensure that the build options in the DLL (or whatever) match this build
 539     wxApp::CheckBuildOptions(WX_BUILD_OPTIONS_SIGNATURE, "wxPython");
 540
 541     // Init the stock objects to a non-NULL value so SWIG doesn't create them as None
 542     wxPy_ReinitStockObjects(1);
 543
 544     wxInitAllImageHandlers();
 545 }
 546
 547
 548
 549 void __wxPyCleanup() {
 550     wxPyDoingCleanup = True;
 551     if (wxPyDoCleanup) {
 552         wxPyDoCleanup = False;
 553         wxEntryCleanup();
 554     }
 555 #ifdef WXP_WITH_THREAD
 556     delete wxPyTMutex;
 557     wxPyTMutex = NULL;
 558     wxPyTStates->Empty();
 559     delete wxPyTStates;
 560     wxPyTStates = NULL;
 561 #endif
 562 }
 563
 564
 565 // Save a reference to the dictionary of the wx._core module, and inject
 566 // a few more things into it.
 567 PyObject* __wxPySetDictionary(PyObject* /* self */, PyObject* args)
 568 {
 569
 570     if (!PyArg_ParseTuple(args, "O", &wxPython_dict))
 571         return NULL;
 572
 573     if (!PyDict_Check(wxPython_dict)) {
 574         PyErr_SetString(PyExc_TypeError,
 575                         "_wxPySetDictionary must have dictionary object!");
 576         return NULL;
 577     }
 578
 579     if (! wxPyPtrTypeMap)
 580         wxPyPtrTypeMap = PyDict_New();
 581     PyDict_SetItemString(wxPython_dict, "__wxPyPtrTypeMap", wxPyPtrTypeMap);
 582
 583     // Create an exception object to use for wxASSERTions
 584     wxPyAssertionError = PyErr_NewException("wx._core.PyAssertionError",
 585                                             PyExc_AssertionError, NULL);
 586     PyDict_SetItemString(wxPython_dict, "PyAssertionError", wxPyAssertionError);
 587
 588     // Create an exception object to use when the app object hasn't been created yet
 589     wxPyNoAppError = PyErr_NewException("wx._core.PyNoAppError",
 590                                         PyExc_RuntimeError, NULL);
 591     PyDict_SetItemString(wxPython_dict, "PyNoAppError", wxPyNoAppError);
 592
 593
 594
 595 #ifdef __WXMOTIF__
 596 #define wxPlatform "__WXMOTIF__"
 597 #define wxPlatName "wxMotif"
 598 #endif
 599 #ifdef __WXX11__
 600 #define wxPlatform "__WXX11__"
 601 #define wxPlatName "wxX11"
 602 #endif
 603 #ifdef __WXGTK__
 604 #define wxPlatform "__WXGTK__"
 605 #define wxPlatName "wxGTK"
 606 #endif
 607 #ifdef __WXMSW__
 608 #define wxPlatform "__WXMSW__"
 609 #define wxPlatName "wxMSW"
 610 #endif
 611 #ifdef __WXMAC__
 612 #define wxPlatform "__WXMAC__"
 613 #define wxPlatName "wxMac"
 614 #endif
 615
 616 #ifdef __WXDEBUG__
 617     int wxdebug = 1;
 618 #else
 619     int wxdebug = 0;
 620 #endif
 621
 622     // These should be deprecated in favor of the PlatformInfo tuple built below...
 623     PyDict_SetItemString(wxPython_dict, "Platform", PyString_FromString(wxPlatform));
 624     PyDict_SetItemString(wxPython_dict, "USE_UNICODE", PyInt_FromLong(wxUSE_UNICODE));
 625     PyDict_SetItemString(wxPython_dict, "__WXDEBUG__", PyInt_FromLong(wxdebug));
 626
 627
 628     PyObject* PlatInfo = PyList_New(0);
 629     PyObject* obj;
 630
 631 #define _AddInfoString(st) \
 632     obj = PyString_FromString(st); \
 633     PyList_Append(PlatInfo, obj); \
 634     Py_DECREF(obj)
 635
 636     _AddInfoString(wxPlatform);
 637     _AddInfoString(wxPlatName);
 638 #if wxUSE_UNICODE
 639     _AddInfoString("unicode");
 640 #else
 641     _AddInfoString("ascii");
 642 #endif
 643 #ifdef __WXGTK__
 644 #ifdef __WXGTK20__
 645     _AddInfoString("gtk2");
 646 #else
 647     _AddInfoString("gtk1");
 648 #endif
 649 #endif
 650 #ifdef __WXDEBUG__
 651     _AddInfoString("wx-assertions-on");
 652 #else
 653     _AddInfoString("wx-assertions-off");
 654 #endif
 655
 656 #undef _AddInfoString
 657
 658     PyObject* PlatInfoTuple = PyList_AsTuple(PlatInfo);
 659     Py_DECREF(PlatInfo);
 660     PyDict_SetItemString(wxPython_dict, "PlatformInfo", PlatInfoTuple);
 661
 662     RETURN_NONE();
 663 }
 664
 665
 666 //---------------------------------------------------------------------------
 667
 668 // Python's PyInstance_Check does not return True for instances of new-style
 669 // classes.  This should get close enough for both new and old classes but I
 670 // should re-evaluate the need for doing instance checks...
 671 bool wxPyInstance_Check(PyObject* obj) {
 672     return PyObject_HasAttrString(obj, "__class__") != 0;
 673 }
 674
 675
 676 // This one checks if the object is an instance of a SWIG proxy class (it has
 677 // a .this attribute)
 678 bool wxPySwigInstance_Check(PyObject* obj) {
 679     return PyObject_HasAttrString(obj, "this") != 0;
 680 }
 681
 682 //---------------------------------------------------------------------------
 683
 684 // The stock objects are no longer created when the wx._core_ module is
 685 // imported, but only after the app object has been created.  The
 686 // wxPy_ReinitStockObjects function will be called 3 times to pass the stock
 687 // objects though various stages of evolution:
 688 //
 689 //   pass 1: Set all the pointers to a non-NULL value so the Python proxy
 690 //           object will be created (otherwise SWIG will just use None.)
 691 //
 692 //   pass 2: After the module has been imported and the python proxys have
 693 //           been created, then set the __class__ to be _wxPyUnbornObject so
 694 //           it will catch any access to the object and will raise an exception.
 695 //
 696 //   pass 3: Finally, from BootstrapApp patch things up so the stock objects
 697 //           can be used.
 698
 699
 700 PyObject* __wxPyFixStockObjects(PyObject* /* self */, PyObject* args)
 701 {
 702     wxPy_ReinitStockObjects(2);
 703     RETURN_NONE();
 704 }
 705
 706
 707 static void rsoPass2(const char* name)
 708 {
 709     static PyObject* unbornObjectClass = NULL;
 710     PyObject* obj;
 711
 712     if (unbornObjectClass == NULL) {
 713         unbornObjectClass = PyDict_GetItemString(wxPython_dict, "_wxPyUnbornObject");
 714         Py_INCREF(unbornObjectClass);
 715     }
 716
 717     // Find the object instance
 718     obj = PyDict_GetItemString(wxPython_dict, (char*)dropwx(name));
 719     wxCHECK_RET(obj != NULL, wxT("Unable to find stock object"));
 720     wxCHECK_RET(wxPySwigInstance_Check(obj), wxT("Not a swig instance"));
 721
 722     // Change its class
 723     PyObject_SetAttrString(obj, "__class__",  unbornObjectClass);
 724
 725 }
 726
 727 static void rsoPass3(const char* name, const char* classname, void* ptr)
 728 {
 729     PyObject* obj;
 730     PyObject* classobj;
 731     PyObject* ptrobj;
 732
 733     // Find the object instance
 734     obj = PyDict_GetItemString(wxPython_dict, (char*)dropwx(name));
 735     wxCHECK_RET(obj != NULL, wxT("Unable to find stock object"));
 736     wxCHECK_RET(wxPySwigInstance_Check(obj), wxT("Not a swig instance"));
 737
 738     // Find the class object and put it back in the instance
 739     classobj = PyDict_GetItemString(wxPython_dict, (char*)dropwx(classname));
 740     wxCHECK_RET(classobj != NULL, wxT("Unable to find stock class object"));
 741     PyObject_SetAttrString(obj, "__class__",  classobj);
 742
 743     // Rebuild the .this swigified pointer with the new value of the C++ pointer
 744     ptrobj = wxPyMakeSwigPtr(ptr, wxString(classname, *wxConvCurrent));
 745     PyObject_SetAttrString(obj, "this", ptrobj);
 746     Py_DECREF(ptrobj);
 747 }
 748
 749
 750
 751 void wxPy_ReinitStockObjects(int pass)
 752 {
 753
 754     // If there is already an App object then wxPython is probably embedded in
 755     // a wx C++ application, so there is no need to do all this.
 756     static bool embedded = false;
 757     if ((pass == 1 || pass == 2) && wxTheApp) {
 758         embedded = true;
 759         return;
 760     }
 761     if (pass == 3 && embedded)
 762         return;
 763
 764
 765 #define REINITOBJ(name, classname) \
 766     if (pass == 1) { name = (classname*)0xC0C0C0C0; } \
 767     else if (pass == 2) { rsoPass2(#name); } \
 768     else if (pass == 3) { rsoPass3(#name, #classname, (void*)name); }
 769
 770
 771 #define REINITOBJ2(name, classname) \
 772     if (pass == 1) { } \
 773     else if (pass == 2) { rsoPass2(#name); } \
 774     else if (pass == 3) { rsoPass3(#name, #classname, (void*)&name); }
 775
 776
 777     REINITOBJ(wxNORMAL_FONT, wxFont);
 778     REINITOBJ(wxSMALL_FONT, wxFont);
 779     REINITOBJ(wxITALIC_FONT, wxFont);
 780     REINITOBJ(wxSWISS_FONT, wxFont);
 781
 782     REINITOBJ(wxRED_PEN, wxPen);
 783     REINITOBJ(wxCYAN_PEN, wxPen);
 784     REINITOBJ(wxGREEN_PEN, wxPen);
 785     REINITOBJ(wxBLACK_PEN, wxPen);
 786     REINITOBJ(wxWHITE_PEN, wxPen);
 787     REINITOBJ(wxTRANSPARENT_PEN, wxPen);
 788     REINITOBJ(wxBLACK_DASHED_PEN, wxPen);
 789     REINITOBJ(wxGREY_PEN, wxPen);
 790     REINITOBJ(wxMEDIUM_GREY_PEN, wxPen);
 791     REINITOBJ(wxLIGHT_GREY_PEN, wxPen);
 792
 793     REINITOBJ(wxBLUE_BRUSH, wxBrush);
 794     REINITOBJ(wxGREEN_BRUSH, wxBrush);
 795     REINITOBJ(wxWHITE_BRUSH, wxBrush);
 796     REINITOBJ(wxBLACK_BRUSH, wxBrush);
 797     REINITOBJ(wxTRANSPARENT_BRUSH, wxBrush);
 798     REINITOBJ(wxCYAN_BRUSH, wxBrush);
 799     REINITOBJ(wxRED_BRUSH, wxBrush);
 800     REINITOBJ(wxGREY_BRUSH, wxBrush);
 801     REINITOBJ(wxMEDIUM_GREY_BRUSH, wxBrush);
 802     REINITOBJ(wxLIGHT_GREY_BRUSH, wxBrush);
 803
 804     REINITOBJ(wxBLACK, wxColour);
 805     REINITOBJ(wxWHITE, wxColour);
 806     REINITOBJ(wxRED, wxColour);
 807     REINITOBJ(wxBLUE, wxColour);
 808     REINITOBJ(wxGREEN, wxColour);
 809     REINITOBJ(wxCYAN, wxColour);
 810     REINITOBJ(wxLIGHT_GREY, wxColour);
 811
 812     REINITOBJ(wxSTANDARD_CURSOR, wxCursor);
 813     REINITOBJ(wxHOURGLASS_CURSOR, wxCursor);
 814     REINITOBJ(wxCROSS_CURSOR, wxCursor);
 815
 816     REINITOBJ2(wxNullBitmap, wxBitmap);
 817     REINITOBJ2(wxNullIcon, wxIcon);
 818     REINITOBJ2(wxNullCursor, wxCursor);
 819     REINITOBJ2(wxNullPen, wxPen);
 820     REINITOBJ2(wxNullBrush, wxBrush);
 821     REINITOBJ2(wxNullPalette, wxPalette);
 822     REINITOBJ2(wxNullFont, wxFont);
 823     REINITOBJ2(wxNullColour, wxColour);
 824
 825     REINITOBJ(wxTheFontList, wxFontList);
 826     REINITOBJ(wxThePenList, wxPenList);
 827     REINITOBJ(wxTheBrushList, wxBrushList);
 828     REINITOBJ(wxTheColourDatabase, wxColourDatabase);
 829
 830
 831     REINITOBJ2(wxDefaultValidator, wxValidator);
 832     REINITOBJ2(wxNullImage, wxImage);
 833     REINITOBJ2(wxNullAcceleratorTable, wxAcceleratorTable);
 834
 835 #undef REINITOBJ
 836 #undef REINITOBJ2
 837 }
 838
 839 //---------------------------------------------------------------------------
 840
 841 // Check for existence of a wxApp, setting an exception if there isn't one.
 842 // This doesn't need to aquire the GIL because it should only be called from
 843 // an %exception before the lock is released.
 844
 845 bool wxPyCheckForApp() {
 846     if (wxTheApp != NULL)
 847         return true;
 848     else {
 849         PyErr_SetString(wxPyNoAppError, "The wx.App object must be created first!");
 850         return false;
 851     }
 852 }
 853
 854 //---------------------------------------------------------------------------
 855
 856
 857 void wxPyClientData_dtor(wxPyClientData* self) {
 858     if (! wxPyDoingCleanup) {           // Don't do it during cleanup as Python
 859                                         // may have already garbage collected the object...
 860         bool blocked = wxPyBeginBlockThreads();
 861         Py_DECREF(self->m_obj);
 862         self->m_obj = NULL;
 863         wxPyEndBlockThreads(blocked);
 864     }
 865 }
 866
 867 void wxPyUserData_dtor(wxPyUserData* self) {
 868     if (! wxPyDoingCleanup) {
 869         bool blocked = wxPyBeginBlockThreads();
 870         Py_DECREF(self->m_obj);
 871         self->m_obj = NULL;
 872         wxPyEndBlockThreads(blocked);
 873     }
 874 }
 875
 876
 877 // This is called when an OOR controled object is being destroyed.  Although
 878 // the C++ object is going away there is no way to force the Python object
 879 // (and all references to it) to die too.  This causes problems (crashes) in
 880 // wxPython when a python shadow object attempts to call a C++ method using
 881 // the now bogus pointer... So to try and prevent this we'll do a little black
 882 // magic and change the class of the python instance to a class that will
 883 // raise an exception for any attempt to call methods with it.  See
 884 // _wxPyDeadObject in _core_ex.py for the implementation of this class.
 885 void wxPyOORClientData_dtor(wxPyOORClientData* self) {
 886
 887     static PyObject* deadObjectClass = NULL;
 888
 889     bool blocked = wxPyBeginBlockThreads();
 890     if (deadObjectClass == NULL) {
 891         deadObjectClass = PyDict_GetItemString(wxPython_dict, "_wxPyDeadObject");
 892         // TODO:  Can not wxASSERT here because inside a wxPyBeginBlock Threads,
 893         // will lead to a deadlock when it tries to aquire the GIL again.
 894         //wxASSERT_MSG(deadObjectClass != NULL, wxT("Can't get _wxPyDeadObject class!"));
 895         Py_INCREF(deadObjectClass);
 896     }
 897
 898
 899     // Only if there is more than one reference to the object
 900     if ( !wxPyDoingCleanup && self->m_obj->ob_refcnt > 1 ) {
 901         // bool isInstance = wxPyInstance_Check(self->m_obj);
 902         // TODO same here
 903         //wxASSERT_MSG(isInstance, wxT("m_obj not an instance!?!?!"));
 904
 905         // Call __del__, if there is one.
 906         PyObject* func = PyObject_GetAttrString(self->m_obj, "__del__");
 907         if (func) {
 908             PyObject* rv = PyObject_CallMethod(self->m_obj, "__del__", NULL);
 909             Py_XDECREF(rv);
 910             Py_DECREF(func);
 911         }
 912         if (PyErr_Occurred())
 913             PyErr_Clear();      // just ignore it for now
 914
 915
 916         PyObject* dict = PyObject_GetAttrString(self->m_obj, "__dict__");
 917         if (dict) {
 918             // Clear the instance's dictionary
 919             PyDict_Clear(dict);
 920
 921             // put the name of the old class into the instance, and then reset the
 922             // class to be the dead class.
 923             PyObject* klass = PyObject_GetAttrString(self->m_obj, "__class__");
 924             PyObject* name =  PyObject_GetAttrString(klass, "__name__");
 925             PyDict_SetItemString(dict, "_name", name);
 926             PyObject_SetAttrString(self->m_obj, "__class__",  deadObjectClass);
 927             //Py_INCREF(deadObjectClass);
 928             Py_DECREF(klass);
 929             Py_DECREF(name);
 930         }
 931     }
 932
 933     // m_obj is DECREF'd in the base class dtor...
 934     wxPyEndBlockThreads(blocked);
 935 }
 936
 937
 938 //---------------------------------------------------------------------------
 939 // Stuff used by OOR to find the right wxPython class type to return and to
 940 // build it.
 941
 942
 943 // The pointer type map is used when the "pointer" type name generated by SWIG
 944 // is not the same as the shadow class name, for example wxPyTreeCtrl
 945 // vs. wxTreeCtrl.  It needs to be referenced in Python as well as from C++,
 946 // so we'll just make it a Python dictionary in the wx module's namespace.
 947 // (See __wxSetDictionary)
 948 void wxPyPtrTypeMap_Add(const char* commonName, const char* ptrName) {
 949     if (! wxPyPtrTypeMap)
 950         wxPyPtrTypeMap = PyDict_New();
 951     PyDict_SetItemString(wxPyPtrTypeMap,
 952                          (char*)commonName,
 953                          PyString_FromString((char*)ptrName));
 954 }
 955
 956
 957
 958
 959 PyObject*  wxPyMake_wxObject(wxObject* source, bool setThisOwn, bool checkEvtHandler) {
 960     PyObject* target = NULL;
 961     bool      isEvtHandler = False;
 962
 963     if (source) {
 964         // If it's derived from wxEvtHandler then there may
 965         // already be a pointer to a Python object that we can use
 966         // in the OOR data.
 967         if (checkEvtHandler && wxIsKindOf(source, wxEvtHandler)) {
 968             isEvtHandler = True;
 969             wxEvtHandler* eh = (wxEvtHandler*)source;
 970             wxPyOORClientData* data = (wxPyOORClientData*)eh->GetClientObject();
 971             if (data) {
 972                 target = data->m_obj;
 973                 if (target)
 974                     Py_INCREF(target);
 975             }
 976         }
 977
 978         if (! target) {
 979             // Otherwise make it the old fashioned way by making a new shadow
 980             // object and putting this pointer in it.  Look up the class
 981             // heirarchy until we find a class name that is located in the
 982             // python module.
 983             const wxClassInfo* info   = source->GetClassInfo();
 984             wxString           name   = info->GetClassName();
 985             bool               exists = wxPyCheckSwigType(name);
 986             while (info && !exists) {
 987                 info = info->GetBaseClass1();
 988                 name = info->GetClassName();
 989                 exists = wxPyCheckSwigType(name);
 990             }
 991             if (info) {
 992                 target = wxPyConstructObject((void*)source, name, setThisOwn);
 993                 if (target && isEvtHandler)
 994                     ((wxEvtHandler*)source)->SetClientObject(new wxPyOORClientData(target));
 995             } else {
 996                 wxString msg(wxT("wxPython class not found for "));
 997                 msg += source->GetClassInfo()->GetClassName();
 998                 PyErr_SetString(PyExc_NameError, msg.mbc_str());
 999                 target = NULL;
1000             }
1001         }
1002     } else {  // source was NULL so return None.
1003         Py_INCREF(Py_None); target = Py_None;
1004     }
1005     return target;
1006 }
1007
1008
1009 PyObject*  wxPyMake_wxSizer(wxSizer* source, bool setThisOwn) {
1010     PyObject* target = NULL;
1011
1012     if (source && wxIsKindOf(source, wxSizer)) {
1013         // If it's derived from wxSizer then there may already be a pointer to
1014         // a Python object that we can use in the OOR data.
1015         wxSizer* sz = (wxSizer*)source;
1016         wxPyOORClientData* data = (wxPyOORClientData*)sz->GetClientObject();
1017         if (data) {
1018             target = data->m_obj;
1019             if (target)
1020                 Py_INCREF(target);
1021         }
1022     }
1023     if (! target) {
1024         target = wxPyMake_wxObject(source, setThisOwn, False);
1025         if (target != Py_None)
1026             ((wxSizer*)source)->SetClientObject(new wxPyOORClientData(target));
1027     }
1028     return target;
1029 }
1030
1031
1032 //---------------------------------------------------------------------------
1033
1034
1035 #ifdef WXP_WITH_THREAD
1036 inline
1037 unsigned long wxPyGetCurrentThreadId() {
1038     return wxThread::GetCurrentId();
1039 }
1040
1041 static wxPyThreadState gs_shutdownTState;
1042
1043 static
1044 wxPyThreadState* wxPyGetThreadState() {
1045     if (wxPyTMutex == NULL) // Python is shutting down...
1046         return &gs_shutdownTState;
1047
1048     unsigned long ctid = wxPyGetCurrentThreadId();
1049     wxPyThreadState* tstate = NULL;
1050
1051     wxPyTMutex->Lock();
1052     for(size_t i=0; i < wxPyTStates->GetCount(); i++) {
1053         wxPyThreadState& info = wxPyTStates->Item(i);
1054         if (info.tid == ctid) {
1055             tstate = &info;
1056             break;
1057         }
1058     }
1059     wxPyTMutex->Unlock();
1060     wxASSERT_MSG(tstate, wxT("PyThreadState should not be NULL!"));
1061     return tstate;
1062 }
1063
1064
1065 static
1066 void wxPySaveThreadState(PyThreadState* tstate) {
1067     if (wxPyTMutex == NULL) { // Python is shutting down, assume a single thread...
1068         gs_shutdownTState.tstate = tstate;
1069         return;
1070     }
1071     unsigned long ctid = wxPyGetCurrentThreadId();
1072     wxPyTMutex->Lock();
1073     for(size_t i=0; i < wxPyTStates->GetCount(); i++) {
1074         wxPyThreadState& info = wxPyTStates->Item(i);
1075         if (info.tid == ctid) {
1076 #if 0
1077             if (info.tstate != tstate)
1078                 wxLogMessage("*** tstate mismatch!???");
1079 #endif
1080             // info.tstate = tstate;    *** DO NOT update existing ones???
1081             // Normally it will never change, but apparently COM callbacks
1082             // (i.e. ActiveX controls) will (incorrectly IMHO) use a transient
1083             // tstate which will then be garbage the next time we try to use
1084             // it...
1085             wxPyTMutex->Unlock();
1086             return;
1087         }
1088     }
1089     // not found, so add it...
1090     wxPyTStates->Add(new wxPyThreadState(ctid, tstate));
1091     wxPyTMutex->Unlock();
1092 }
1093
1094 #endif
1095
1096
1097
1098 // Calls from Python to wxWindows code are wrapped in calls to these
1099 // functions:
1100
1101 PyThreadState* wxPyBeginAllowThreads() {
1102 #ifdef WXP_WITH_THREAD
1103     PyThreadState* saved = PyEval_SaveThread();  // Py_BEGIN_ALLOW_THREADS;
1104     wxPySaveThreadState(saved);
1105     return saved;
1106 #else
1107     return NULL;
1108 #endif
1109 }
1110
1111 void wxPyEndAllowThreads(PyThreadState* saved) {
1112 #ifdef WXP_WITH_THREAD
1113     PyEval_RestoreThread(saved);   // Py_END_ALLOW_THREADS;
1114 #endif
1115 }
1116
1117
1118
1119 // Calls from wxWindows back to Python code, or even any PyObject
1120 // manipulations, PyDECREF's and etc. are wrapped in calls to these functions:
1121
1122 bool wxPyBeginBlockThreads() {
1123 #ifdef WXP_WITH_THREAD
1124     // This works in for 2.3, maybe a good alternative to find the needed tstate?
1125     // PyThreadState *check = PyGILState_GetThisThreadState();
1126
1127     PyThreadState *current = _PyThreadState_Current;
1128
1129     // Only block if there wasn't already a tstate, or if the current one is
1130     // not the one we are wanting to change to.  This should prevent deadlock
1131     // if there are nested calls to wxPyBeginBlockThreads
1132     bool blocked = false;
1133     wxPyThreadState* tstate = wxPyGetThreadState();
1134     if (current != tstate->tstate) {
1135         PyEval_RestoreThread(tstate->tstate);
1136         blocked = true;
1137     }
1138     return blocked;
1139 #endif
1140 }
1141
1142
1143 void wxPyEndBlockThreads(bool blocked) {
1144 #ifdef WXP_WITH_THREAD
1145     // Only unblock if we blocked in the last call to wxPyBeginBlockThreads.
1146     // The value of blocked passed in needs to be the same as that returned
1147     // from wxPyBeginBlockThreads at the same nesting level.
1148     if ( blocked ) {
1149         PyEval_SaveThread();
1150     }
1151 #endif
1152 }
1153
1154
1155 //---------------------------------------------------------------------------
1156 // wxPyInputStream and wxPyCBInputStream methods
1157
1158
1159 void wxPyInputStream::close() {
1160     /* do nothing for now */
1161 }
1162
1163 void wxPyInputStream::flush() {
1164     /* do nothing for now */
1165 }
1166
1167 bool wxPyInputStream::eof() {
1168     if (m_wxis)
1169         return m_wxis->Eof();
1170     else
1171         return True;
1172 }
1173
1174 wxPyInputStream::~wxPyInputStream() {
1175     /* do nothing */
1176 }
1177
1178
1179
1180
1181 PyObject* wxPyInputStream::read(int size) {
1182     PyObject* obj = NULL;
1183     wxMemoryBuffer buf;
1184     const int BUFSIZE = 1024;
1185
1186     // check if we have a real wxInputStream to work with
1187     if (!m_wxis) {
1188         bool blocked = wxPyBeginBlockThreads();
1189         PyErr_SetString(PyExc_IOError, "no valid C-wxInputStream");
1190         wxPyEndBlockThreads(blocked);
1191         return NULL;
1192     }
1193
1194     if (size < 0) {
1195         // read while bytes are available on the stream
1196         while ( m_wxis->CanRead() ) {
1197             m_wxis->Read(buf.GetAppendBuf(BUFSIZE), BUFSIZE);
1198             buf.UngetAppendBuf(m_wxis->LastRead());
1199         }
1200
1201     } else {  // Read only size number of characters
1202         m_wxis->Read(buf.GetWriteBuf(size), size);
1203         buf.UngetWriteBuf(m_wxis->LastRead());
1204     }
1205
1206     // error check
1207     bool blocked = wxPyBeginBlockThreads();
1208     wxStreamError err = m_wxis->GetLastError();
1209     if (err != wxSTREAM_NO_ERROR && err != wxSTREAM_EOF) {
1210         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
1211     }
1212     else {
1213         // We use only strings for the streams, not unicode
1214         obj = PyString_FromStringAndSize(buf, buf.GetDataLen());
1215     }
1216     wxPyEndBlockThreads(blocked);
1217     return obj;
1218 }
1219
1220
1221 PyObject* wxPyInputStream::readline(int size) {
1222     PyObject* obj = NULL;
1223     wxMemoryBuffer buf;
1224     int i;
1225     char ch;
1226
1227     // check if we have a real wxInputStream to work with
1228     if (!m_wxis) {
1229         bool blocked = wxPyBeginBlockThreads();
1230         PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream");
1231         wxPyEndBlockThreads(blocked);
1232         return NULL;
1233     }
1234
1235     // read until \n or byte limit reached
1236     for (i=ch=0; (ch != '\n') && (m_wxis->CanRead()) && ((size < 0) || (i < size)); i++) {
1237         ch = m_wxis->GetC();
1238         buf.AppendByte(ch);
1239     }
1240
1241     // errorcheck
1242     bool blocked = wxPyBeginBlockThreads();
1243     wxStreamError err = m_wxis->GetLastError();
1244     if (err != wxSTREAM_NO_ERROR && err != wxSTREAM_EOF) {
1245         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
1246     }
1247     else {
1248         // We use only strings for the streams, not unicode
1249         obj = PyString_FromStringAndSize((char*)buf.GetData(), buf.GetDataLen());
1250     }
1251     wxPyEndBlockThreads(blocked);
1252     return obj;
1253 }
1254
1255
1256 PyObject* wxPyInputStream::readlines(int sizehint) {
1257     PyObject* pylist;
1258
1259     // check if we have a real wxInputStream to work with
1260     if (!m_wxis) {
1261         bool blocked = wxPyBeginBlockThreads();
1262         PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream");
1263         wxPyEndBlockThreads(blocked);
1264         return NULL;
1265     }
1266
1267     // init list
1268     bool blocked = wxPyBeginBlockThreads();
1269     pylist = PyList_New(0);
1270     wxPyEndBlockThreads(blocked);
1271
1272     if (!pylist) {
1273         bool blocked = wxPyBeginBlockThreads();
1274         PyErr_NoMemory();
1275         wxPyEndBlockThreads(blocked);
1276         return NULL;
1277     }
1278
1279     // read sizehint bytes or until EOF
1280     int i;
1281     for (i=0; (m_wxis->CanRead()) && ((sizehint < 0) || (i < sizehint));) {
1282         PyObject* s = this->readline();
1283         if (s == NULL) {
1284             bool blocked = wxPyBeginBlockThreads();
1285             Py_DECREF(pylist);
1286             wxPyEndBlockThreads(blocked);
1287             return NULL;
1288         }
1289         bool blocked = wxPyBeginBlockThreads();
1290         PyList_Append(pylist, s);
1291         i += PyString_Size(s);
1292         wxPyEndBlockThreads(blocked);
1293     }
1294
1295     // error check
1296     wxStreamError err = m_wxis->GetLastError();
1297     if (err != wxSTREAM_NO_ERROR && err != wxSTREAM_EOF) {
1298         bool blocked = wxPyBeginBlockThreads();
1299         Py_DECREF(pylist);
1300         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
1301         wxPyEndBlockThreads(blocked);
1302         return NULL;
1303     }
1304
1305     return pylist;
1306 }
1307
1308
1309 void wxPyInputStream::seek(int offset, int whence) {
1310     if (m_wxis)
1311         m_wxis->SeekI(offset, wxSeekMode(whence));
1312 }
1313
1314 int wxPyInputStream::tell(){
1315     if (m_wxis)
1316         return m_wxis->TellI();
1317     else return 0;
1318 }
1319
1320
1321
1322
1323 wxPyCBInputStream::wxPyCBInputStream(PyObject *r, PyObject *s, PyObject *t, bool block)
1324     : wxInputStream(), m_read(r), m_seek(s), m_tell(t), m_block(block)
1325 {}
1326
1327
1328 wxPyCBInputStream::~wxPyCBInputStream() {
1329     bool blocked=false;
1330     if (m_block) blocked = wxPyBeginBlockThreads();
1331     Py_XDECREF(m_read);
1332     Py_XDECREF(m_seek);
1333     Py_XDECREF(m_tell);
1334     if (m_block) wxPyEndBlockThreads(blocked);
1335 }
1336
1337
1338 wxPyCBInputStream* wxPyCBInputStream::create(PyObject *py, bool block) {
1339     bool blocked=false;
1340     if (block) blocked = wxPyBeginBlockThreads();
1341
1342     PyObject* read = getMethod(py, "read");
1343     PyObject* seek = getMethod(py, "seek");
1344     PyObject* tell = getMethod(py, "tell");
1345
1346     if (!read) {
1347         PyErr_SetString(PyExc_TypeError, "Not a file-like object");
1348         Py_XDECREF(read);
1349         Py_XDECREF(seek);
1350         Py_XDECREF(tell);
1351         if (block) wxPyEndBlockThreads(blocked);
1352         return NULL;
1353     }
1354
1355     if (block) wxPyEndBlockThreads(blocked);
1356     return new wxPyCBInputStream(read, seek, tell, block);
1357 }
1358
1359
1360 wxPyCBInputStream* wxPyCBInputStream_create(PyObject *py, bool block) {
1361     return wxPyCBInputStream::create(py, block);
1362 }
1363
1364 PyObject* wxPyCBInputStream::getMethod(PyObject* py, char* name) {
1365     if (!PyObject_HasAttrString(py, name))
1366         return NULL;
1367     PyObject* o = PyObject_GetAttrString(py, name);
1368     if (!PyMethod_Check(o) && !PyCFunction_Check(o)) {
1369         Py_DECREF(o);
1370         return NULL;
1371     }
1372     return o;
1373 }
1374
1375
1376 size_t wxPyCBInputStream::GetSize() const {
1377     wxPyCBInputStream* self = (wxPyCBInputStream*)this; // cast off const
1378     if (m_seek && m_tell) {
1379         off_t temp = self->OnSysTell();
1380         off_t ret = self->OnSysSeek(0, wxFromEnd);
1381         self->OnSysSeek(temp, wxFromStart);
1382         return ret;
1383     }
1384     else
1385         return 0;
1386 }
1387
1388
1389 size_t wxPyCBInputStream::OnSysRead(void *buffer, size_t bufsize) {
1390     if (bufsize == 0)
1391         return 0;
1392
1393     bool blocked = wxPyBeginBlockThreads();
1394     PyObject* arglist = Py_BuildValue("(i)", bufsize);
1395     PyObject* result = PyEval_CallObject(m_read, arglist);
1396     Py_DECREF(arglist);
1397
1398     size_t o = 0;
1399     if ((result != NULL) && PyString_Check(result)) {
1400         o = PyString_Size(result);
1401         if (o == 0)
1402             m_lasterror = wxSTREAM_EOF;
1403         if (o > bufsize)
1404             o = bufsize;
1405         memcpy((char*)buffer, PyString_AsString(result), o);  // strings only, not unicode...
1406         Py_DECREF(result);
1407
1408     }
1409     else
1410         m_lasterror = wxSTREAM_READ_ERROR;
1411     wxPyEndBlockThreads(blocked);
1412     return o;
1413 }
1414
1415 size_t wxPyCBInputStream::OnSysWrite(const void *buffer, size_t bufsize) {
1416     m_lasterror = wxSTREAM_WRITE_ERROR;
1417     return 0;
1418 }
1419
1420 off_t wxPyCBInputStream::OnSysSeek(off_t off, wxSeekMode mode) {
1421     bool blocked = wxPyBeginBlockThreads();
1422 #ifdef _LARGE_FILES
1423     // off_t is a 64-bit value...
1424     PyObject* arglist = Py_BuildValue("(Li)", off, mode);
1425 #else
1426     PyObject* arglist = Py_BuildValue("(ii)", off, mode);
1427 #endif
1428     PyObject* result = PyEval_CallObject(m_seek, arglist);
1429     Py_DECREF(arglist);
1430     Py_XDECREF(result);
1431     wxPyEndBlockThreads(blocked);
1432     return OnSysTell();
1433 }
1434
1435
1436 off_t wxPyCBInputStream::OnSysTell() const {
1437     bool blocked = wxPyBeginBlockThreads();
1438     PyObject* arglist = Py_BuildValue("()");
1439     PyObject* result = PyEval_CallObject(m_tell, arglist);
1440     Py_DECREF(arglist);
1441     off_t o = 0;
1442     if (result != NULL) {
1443 #ifdef _LARGE_FILES
1444         if (PyLong_Check(result))
1445             o = PyLong_AsLongLong(result);
1446         else
1447 #endif
1448             o = PyInt_AsLong(result);
1449         Py_DECREF(result);
1450     };
1451     wxPyEndBlockThreads(blocked);
1452     return o;
1453 }
1454
1455 //----------------------------------------------------------------------
1456
1457 IMPLEMENT_ABSTRACT_CLASS(wxPyCallback, wxObject);
1458
1459 wxPyCallback::wxPyCallback(PyObject* func) {
1460     m_func = func;
1461     Py_INCREF(m_func);
1462 }
1463
1464 wxPyCallback::wxPyCallback(const wxPyCallback& other) {
1465     m_func = other.m_func;
1466     Py_INCREF(m_func);
1467 }
1468
1469 wxPyCallback::~wxPyCallback() {
1470     bool blocked = wxPyBeginBlockThreads();
1471     Py_DECREF(m_func);
1472     wxPyEndBlockThreads(blocked);
1473 }
1474
1475
1476 #define wxPy_PRECALLINIT     "_preCallInit"
1477 #define wxPy_POSTCALLCLEANUP "_postCallCleanup"
1478
1479 // This function is used for all events destined for Python event handlers.
1480 void wxPyCallback::EventThunker(wxEvent& event) {
1481     wxPyCallback*   cb = (wxPyCallback*)event.m_callbackUserData;
1482     PyObject*       func = cb->m_func;
1483     PyObject*       result;
1484     PyObject*       arg;
1485     PyObject*       tuple;
1486     bool            checkSkip = False;
1487
1488     bool blocked = wxPyBeginBlockThreads();
1489     wxString className = event.GetClassInfo()->GetClassName();
1490
1491     // If the event is one of these types then pass the original
1492     // event object instead of the one passed to us.
1493     if ( className == wxT("wxPyEvent") ) {
1494         arg =       ((wxPyEvent*)&event)->GetSelf();
1495         checkSkip = ((wxPyEvent*)&event)->GetCloned();
1496     }
1497     else if ( className == wxT("wxPyCommandEvent") ) {
1498         arg =       ((wxPyCommandEvent*)&event)->GetSelf();
1499         checkSkip = ((wxPyCommandEvent*)&event)->GetCloned();
1500     }
1501     else {
1502         arg = wxPyConstructObject((void*)&event, className);
1503     }
1504
1505     if (!arg) {
1506         PyErr_Print();
1507     } else {
1508         // "intern" the pre/post method names to speed up the HasAttr
1509         static PyObject* s_preName  = NULL;
1510         static PyObject* s_postName = NULL;
1511         if (s_preName == NULL) {
1512             s_preName  = PyString_FromString(wxPy_PRECALLINIT);
1513             s_postName = PyString_FromString(wxPy_POSTCALLCLEANUP);
1514         }
1515
1516         // Check if the event object needs some preinitialization
1517         if (PyObject_HasAttr(arg, s_preName)) {
1518             result = PyObject_CallMethodObjArgs(arg, s_preName, arg, NULL);
1519             if ( result ) {
1520                 Py_DECREF(result);   // result is ignored, but we still need to decref it
1521                 PyErr_Clear();       // Just in case...
1522             } else {
1523                 PyErr_Print();
1524             }
1525         }
1526
1527         // Call the event handler, passing the event object
1528         tuple = PyTuple_New(1);
1529         PyTuple_SET_ITEM(tuple, 0, arg);  // steals ref to arg
1530         result = PyEval_CallObject(func, tuple);
1531         if ( result ) {
1532             Py_DECREF(result);   // result is ignored, but we still need to decref it
1533             PyErr_Clear();       // Just in case...
1534         } else {
1535             PyErr_Print();
1536         }
1537
1538         // Check if the event object needs some post cleanup
1539         if (PyObject_HasAttr(arg, s_postName)) {
1540             result = PyObject_CallMethodObjArgs(arg, s_postName, arg, NULL);
1541             if ( result ) {
1542                 Py_DECREF(result);   // result is ignored, but we still need to decref it
1543                 PyErr_Clear();       // Just in case...
1544             } else {
1545                 PyErr_Print();
1546             }
1547         }
1548
1549         if ( checkSkip ) {
1550             // if the event object was one of our special types and
1551             // it had been cloned, then we need to extract the Skipped
1552             // value from the original and set it in the clone.
1553             result = PyObject_CallMethod(arg, "GetSkipped", "");
1554             if ( result ) {
1555                 event.Skip(PyInt_AsLong(result));
1556                 Py_DECREF(result);
1557             } else {
1558                 PyErr_Print();
1559             }
1560         }
1561         Py_DECREF(tuple);
1562     }
1563     wxPyEndBlockThreads(blocked);
1564 }
1565
1566
1567 //----------------------------------------------------------------------
1568
1569 wxPyCallbackHelper::wxPyCallbackHelper(const wxPyCallbackHelper& other) {
1570       m_lastFound = NULL;
1571       m_self = other.m_self;
1572       m_class = other.m_class;
1573       if (m_self) {
1574           Py_INCREF(m_self);
1575           Py_INCREF(m_class);
1576       }
1577 }
1578
1579
1580 void wxPyCallbackHelper::setSelf(PyObject* self, PyObject* klass, int incref) {
1581     m_self = self;
1582     m_class = klass;
1583     m_incRef = incref;
1584     if (incref) {
1585         Py_INCREF(m_self);
1586         Py_INCREF(m_class);
1587     }
1588 }
1589
1590
1591 #if PYTHON_API_VERSION >= 1011
1592
1593 // Prior to Python 2.2 PyMethod_GetClass returned the class object
1594 // in which the method was defined.  Starting with 2.2 it returns
1595 // "class that asked for the method" which seems totally bogus to me
1596 // but apprently it fixes some obscure problem waiting to happen in
1597 // Python.  Since the API was not documented Guido and the gang felt
1598 // safe in changing it.  Needless to say that totally screwed up the
1599 // logic below in wxPyCallbackHelper::findCallback, hence this icky
1600 // code to find the class where the method is actually defined...
1601
1602 static
1603 PyObject* PyFindClassWithAttr(PyObject *klass, PyObject *name)
1604 {
1605     int i, n;
1606
1607     if (PyType_Check(klass)) {      // new style classes
1608         // This code is borrowed/adapted from _PyType_Lookup in typeobject.c
1609         PyTypeObject* type = (PyTypeObject*)klass;
1610         PyObject *mro, *res, *base, *dict;
1611         /* Look in tp_dict of types in MRO */
1612         mro = type->tp_mro;
1613         assert(PyTuple_Check(mro));
1614         n = PyTuple_GET_SIZE(mro);
1615         for (i = 0; i < n; i++) {
1616             base = PyTuple_GET_ITEM(mro, i);
1617             if (PyClass_Check(base))
1618                 dict = ((PyClassObject *)base)->cl_dict;
1619             else {
1620                 assert(PyType_Check(base));
1621                 dict = ((PyTypeObject *)base)->tp_dict;
1622             }
1623             assert(dict && PyDict_Check(dict));
1624             res = PyDict_GetItem(dict, name);
1625             if (res != NULL)
1626                 return base;
1627         }
1628         return NULL;
1629     }
1630
1631     else if (PyClass_Check(klass)) { // old style classes
1632         // This code is borrowed/adapted from class_lookup in classobject.c
1633         PyClassObject* cp = (PyClassObject*)klass;
1634         PyObject *value = PyDict_GetItem(cp->cl_dict, name);
1635         if (value != NULL) {
1636             return (PyObject*)cp;
1637         }
1638         n = PyTuple_Size(cp->cl_bases);
1639         for (i = 0; i < n; i++) {
1640             PyObject* base = PyTuple_GetItem(cp->cl_bases, i);
1641             PyObject *v = PyFindClassWithAttr(base, name);
1642             if (v != NULL)
1643                 return v;
1644         }
1645         return NULL;
1646     }
1647     return NULL;
1648 }
1649 #endif
1650
1651
1652 static
1653 PyObject* PyMethod_GetDefiningClass(PyObject* method, const char* name)
1654 {
1655     PyObject* mgc = PyMethod_GET_CLASS(method);
1656
1657 #if PYTHON_API_VERSION <= 1010    // prior to Python 2.2, the easy way
1658     return mgc;
1659 #else                             // 2.2 and after, the hard way...
1660
1661     PyObject* nameo = PyString_FromString(name);
1662     PyObject* klass = PyFindClassWithAttr(mgc, nameo);
1663     Py_DECREF(nameo);
1664     return klass;
1665 #endif
1666 }
1667
1668
1669
1670 bool wxPyCallbackHelper::findCallback(const char* name) const {
1671     wxPyCallbackHelper* self = (wxPyCallbackHelper*)this; // cast away const
1672     self->m_lastFound = NULL;
1673
1674     // If the object (m_self) has an attibute of the given name...
1675     if (m_self && PyObject_HasAttrString(m_self, (char*)name)) {
1676         PyObject *method, *klass;
1677         method = PyObject_GetAttrString(m_self, (char*)name);
1678
1679         // ...and if that attribute is a method, and if that method's class is
1680         // not from a base class...
1681         if (PyMethod_Check(method) &&
1682             (klass = PyMethod_GetDefiningClass(method, (char*)name)) != NULL &&
1683             ((klass == m_class) || PyObject_IsSubclass(klass, m_class))) {
1684
1685             // ...then we'll save a pointer to the method so callCallback can call it.
1686             self->m_lastFound = method;
1687         }
1688         else {
1689             Py_DECREF(method);
1690         }
1691     }
1692     return m_lastFound != NULL;
1693 }
1694
1695
1696 int wxPyCallbackHelper::callCallback(PyObject* argTuple) const {
1697     PyObject*   result;
1698     int         retval = False;
1699
1700     result = callCallbackObj(argTuple);
1701     if (result) {                       // Assumes an integer return type...
1702         retval = PyInt_AsLong(result);
1703         Py_DECREF(result);
1704         PyErr_Clear();                  // forget about it if it's not...
1705     }
1706     return retval;
1707 }
1708
1709 // Invoke the Python callable object, returning the raw PyObject return
1710 // value.  Caller should DECREF the return value and also manage the GIL.
1711 PyObject* wxPyCallbackHelper::callCallbackObj(PyObject* argTuple) const {
1712     PyObject* result;
1713
1714     // Save a copy of the pointer in case the callback generates another
1715     // callback.  In that case m_lastFound will have a different value when
1716     // it gets back here...
1717     PyObject* method = m_lastFound;
1718
1719     result = PyEval_CallObject(method, argTuple);
1720     Py_DECREF(argTuple);
1721     Py_DECREF(method);
1722     if (!result) {
1723         PyErr_Print();
1724     }
1725     return result;
1726 }
1727
1728
1729 void wxPyCBH_setCallbackInfo(wxPyCallbackHelper& cbh, PyObject* self, PyObject* klass, int incref) {
1730     cbh.setSelf(self, klass, incref);
1731 }
1732
1733 bool wxPyCBH_findCallback(const wxPyCallbackHelper& cbh, const char* name) {
1734     return cbh.findCallback(name);
1735 }
1736
1737 int  wxPyCBH_callCallback(const wxPyCallbackHelper& cbh, PyObject* argTuple) {
1738     return cbh.callCallback(argTuple);
1739 }
1740
1741 PyObject* wxPyCBH_callCallbackObj(const wxPyCallbackHelper& cbh, PyObject* argTuple) {
1742     return cbh.callCallbackObj(argTuple);
1743 }
1744
1745
1746 void wxPyCBH_delete(wxPyCallbackHelper* cbh) {
1747     if (cbh->m_incRef) {
1748         bool blocked = wxPyBeginBlockThreads();
1749         Py_XDECREF(cbh->m_self);
1750         Py_XDECREF(cbh->m_class);
1751         wxPyEndBlockThreads(blocked);
1752     }
1753 }
1754
1755 //---------------------------------------------------------------------------
1756 //---------------------------------------------------------------------------
1757 // These event classes can be derived from in Python and passed through the event
1758 // system without losing anything.  They do this by keeping a reference to
1759 // themselves and some special case handling in wxPyCallback::EventThunker.
1760
1761
1762 wxPyEvtSelfRef::wxPyEvtSelfRef() {
1763     //m_self = Py_None;         // **** We don't do normal ref counting to prevent
1764     //Py_INCREF(m_self);        //      circular loops...
1765     m_cloned = False;
1766 }
1767
1768 wxPyEvtSelfRef::~wxPyEvtSelfRef() {
1769     bool blocked = wxPyBeginBlockThreads();
1770     if (m_cloned)
1771         Py_DECREF(m_self);
1772     wxPyEndBlockThreads(blocked);
1773 }
1774
1775 void wxPyEvtSelfRef::SetSelf(PyObject* self, bool clone) {
1776     bool blocked = wxPyBeginBlockThreads();
1777     if (m_cloned)
1778         Py_DECREF(m_self);
1779     m_self = self;
1780     if (clone) {
1781         Py_INCREF(m_self);
1782         m_cloned = True;
1783     }
1784     wxPyEndBlockThreads(blocked);
1785 }
1786
1787 PyObject* wxPyEvtSelfRef::GetSelf() const {
1788     Py_INCREF(m_self);
1789     return m_self;
1790 }
1791
1792
1793 IMPLEMENT_ABSTRACT_CLASS(wxPyEvent, wxEvent);
1794 IMPLEMENT_ABSTRACT_CLASS(wxPyCommandEvent, wxCommandEvent);
1795
1796
1797 wxPyEvent::wxPyEvent(int winid, wxEventType commandType)
1798     : wxEvent(winid, commandType) {
1799 }
1800
1801
1802 wxPyEvent::wxPyEvent(const wxPyEvent& evt)
1803     : wxEvent(evt)
1804 {
1805     SetSelf(evt.m_self, True);
1806 }
1807
1808
1809 wxPyEvent::~wxPyEvent() {
1810 }
1811
1812
1813 wxPyCommandEvent::wxPyCommandEvent(wxEventType commandType, int id)
1814     : wxCommandEvent(commandType, id) {
1815 }
1816
1817
1818 wxPyCommandEvent::wxPyCommandEvent(const wxPyCommandEvent& evt)
1819     : wxCommandEvent(evt)
1820 {
1821     SetSelf(evt.m_self, True);
1822 }
1823
1824
1825 wxPyCommandEvent::~wxPyCommandEvent() {
1826 }
1827
1828
1829
1830
1831
1832 //---------------------------------------------------------------------------
1833 //---------------------------------------------------------------------------
1834 // Convert a wxList to a Python List, only works for lists of wxObjects
1835
1836 PyObject* wxPy_ConvertList(wxListBase* listbase) {
1837     wxList*     list = (wxList*)listbase;  // this is probably bad...
1838     PyObject*   pyList;
1839     PyObject*   pyObj;
1840     wxObject*   wxObj;
1841     wxNode*     node = list->GetFirst();
1842
1843     bool blocked = wxPyBeginBlockThreads();
1844     pyList = PyList_New(0);
1845     while (node) {
1846         wxObj = node->GetData();
1847         pyObj = wxPyMake_wxObject(wxObj,false);
1848         PyList_Append(pyList, pyObj);
1849         node = node->GetNext();
1850     }
1851     wxPyEndBlockThreads(blocked);
1852     return pyList;
1853 }
1854
1855 //----------------------------------------------------------------------
1856
1857 long wxPyGetWinHandle(wxWindow* win) {
1858
1859 #ifdef __WXMSW__
1860     return (long)win->GetHandle();
1861 #endif
1862
1863 #if defined(__WXGTK__) || defined(__WXX11)
1864     return (long)GetXWindow(win);
1865 #endif
1866
1867 #ifdef __WXMAC__
1868     //return (long)MAC_WXHWND(win->MacGetTopLevelWindowRef());
1869     return (long)win->GetHandle();
1870 #endif
1871
1872     return 0;
1873 }
1874
1875 //----------------------------------------------------------------------
1876 // Some helper functions for typemaps in my_typemaps.i, so they won't be
1877 // included in every file over and over again...
1878
1879 wxString* wxString_in_helper(PyObject* source) {
1880     wxString* target = NULL;
1881
1882     if (!PyString_Check(source) && !PyUnicode_Check(source)) {
1883         PyErr_SetString(PyExc_TypeError, "String or Unicode type required");
1884         return NULL;
1885     }
1886 #if wxUSE_UNICODE
1887     PyObject* uni = source;
1888     if (PyString_Check(source)) {
1889         uni = PyUnicode_FromObject(source);
1890         if (PyErr_Occurred()) return NULL;
1891     }
1892     target = new wxString();
1893     size_t len = PyUnicode_GET_SIZE(uni);
1894     if (len) {
1895         PyUnicode_AsWideChar((PyUnicodeObject*)uni, target->GetWriteBuf(len), len);
1896         target->UngetWriteBuf();
1897     }
1898
1899     if (PyString_Check(source))
1900         Py_DECREF(uni);
1901 #else
1902     char* tmpPtr; int tmpSize;
1903     if (PyString_AsStringAndSize(source, &tmpPtr, &tmpSize) == -1) {
1904         PyErr_SetString(PyExc_TypeError, "Unable to convert string");
1905         return NULL;
1906     }
1907     target = new wxString(tmpPtr, tmpSize);
1908 #endif // wxUSE_UNICODE
1909
1910     return target;
1911 }
1912
1913
1914 // Similar to above except doesn't use "new" and doesn't set an exception
1915 wxString Py2wxString(PyObject* source)
1916 {
1917     wxString target;
1918
1919 #if wxUSE_UNICODE
1920     // Convert to a unicode object, if not already, then to a wxString
1921     PyObject* uni = source;
1922     if (!PyUnicode_Check(source)) {
1923         uni = PyUnicode_FromObject(source);
1924         if (PyErr_Occurred()) return wxEmptyString;  // TODO:  should we PyErr_Clear?
1925     }
1926     size_t len = PyUnicode_GET_SIZE(uni);
1927     if (len) {
1928         PyUnicode_AsWideChar((PyUnicodeObject*)uni, target.GetWriteBuf(len), len);
1929         target.UngetWriteBuf();
1930     }
1931
1932     if (!PyUnicode_Check(source))
1933         Py_DECREF(uni);
1934 #else
1935     // Convert to a string object if it isn't already, then to wxString
1936     PyObject* str = source;
1937     if (!PyString_Check(source)) {
1938         str = PyObject_Str(source);
1939         if (PyErr_Occurred()) return wxEmptyString;    // TODO:  should we PyErr_Clear?
1940     }
1941     char* tmpPtr; int tmpSize;
1942     PyString_AsStringAndSize(str, &tmpPtr, &tmpSize);
1943     target = wxString(tmpPtr, tmpSize);
1944
1945     if (!PyString_Check(source))
1946         Py_DECREF(str);
1947 #endif // wxUSE_UNICODE
1948
1949     return target;
1950 }
1951
1952
1953 // Make either a Python String or Unicode object, depending on build mode
1954 PyObject* wx2PyString(const wxString& src)
1955 {
1956     PyObject* str;
1957 #if wxUSE_UNICODE
1958     str = PyUnicode_FromWideChar(src.c_str(), src.Len());
1959 #else
1960     str = PyString_FromStringAndSize(src.c_str(), src.Len());
1961 #endif
1962     return str;
1963 }
1964
1965
1966 //----------------------------------------------------------------------
1967
1968
1969 byte* byte_LIST_helper(PyObject* source) {
1970     if (!PyList_Check(source)) {
1971         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1972         return NULL;
1973     }
1974     int count = PyList_Size(source);
1975     byte* temp = new byte[count];
1976     if (! temp) {
1977         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1978         return NULL;
1979     }
1980     for (int x=0; x<count; x++) {
1981         PyObject* o = PyList_GetItem(source, x);
1982         if (! PyInt_Check(o)) {
1983             PyErr_SetString(PyExc_TypeError, "Expected a list of integers.");
1984             return NULL;
1985         }
1986         temp[x] = (byte)PyInt_AsLong(o);
1987     }
1988     return temp;
1989 }
1990
1991
1992 int* int_LIST_helper(PyObject* source) {
1993     if (!PyList_Check(source)) {
1994         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1995         return NULL;
1996     }
1997     int count = PyList_Size(source);
1998     int* temp = new int[count];
1999     if (! temp) {
2000         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
2001         return NULL;
2002     }
2003     for (int x=0; x<count; x++) {
2004         PyObject* o = PyList_GetItem(source, x);
2005         if (! PyInt_Check(o)) {
2006             PyErr_SetString(PyExc_TypeError, "Expected a list of integers.");
2007             return NULL;
2008         }
2009         temp[x] = PyInt_AsLong(o);
2010     }
2011     return temp;
2012 }
2013
2014
2015 long* long_LIST_helper(PyObject* source) {
2016     if (!PyList_Check(source)) {
2017         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
2018         return NULL;
2019     }
2020     int count = PyList_Size(source);
2021     long* temp = new long[count];
2022     if (! temp) {
2023         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
2024         return NULL;
2025     }
2026     for (int x=0; x<count; x++) {
2027         PyObject* o = PyList_GetItem(source, x);
2028         if (! PyInt_Check(o)) {
2029             PyErr_SetString(PyExc_TypeError, "Expected a list of integers.");
2030             return NULL;
2031         }
2032         temp[x] = PyInt_AsLong(o);
2033     }
2034     return temp;
2035 }
2036
2037
2038 char** string_LIST_helper(PyObject* source) {
2039     if (!PyList_Check(source)) {
2040         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
2041         return NULL;
2042     }
2043     int count = PyList_Size(source);
2044     char** temp = new char*[count];
2045     if (! temp) {
2046         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
2047         return NULL;
2048     }
2049     for (int x=0; x<count; x++) {
2050         PyObject* o = PyList_GetItem(source, x);
2051         if (! PyString_Check(o)) {
2052             PyErr_SetString(PyExc_TypeError, "Expected a list of strings.");
2053             return NULL;
2054         }
2055         temp[x] = PyString_AsString(o);
2056     }
2057     return temp;
2058 }
2059
2060 //--------------------------------
2061 // Part of patch from Tim Hochberg
2062 static inline bool wxPointFromObjects(PyObject* o1, PyObject* o2, wxPoint* point) {
2063     if (PyInt_Check(o1) && PyInt_Check(o2)) {
2064         point->x = PyInt_AS_LONG(o1);
2065         point->y = PyInt_AS_LONG(o2);
2066         return True;
2067     }
2068     if (PyFloat_Check(o1) && PyFloat_Check(o2)) {
2069         point->x = (int)PyFloat_AS_DOUBLE(o1);
2070         point->y = (int)PyFloat_AS_DOUBLE(o2);
2071         return True;
2072     }
2073     if (wxPySwigInstance_Check(o1) || wxPySwigInstance_Check(o2)) {  // TODO: Why???
2074         // Disallow instances because they can cause havok
2075         return False;
2076     }
2077     if (PyNumber_Check(o1) && PyNumber_Check(o2)) {
2078         // I believe this excludes instances, so this should be safe without INCREFFing o1 and o2
2079         point->x = PyInt_AsLong(o1);
2080         point->y = PyInt_AsLong(o2);
2081         return True;
2082     }
2083     return False;
2084 }
2085
2086
2087 wxPoint* wxPoint_LIST_helper(PyObject* source, int *count) {
2088     // Putting all of the declarations here allows
2089     // us to put the error handling all in one place.
2090     int x;
2091     wxPoint* temp;
2092     PyObject *o, *o1, *o2;
2093     bool isFast = PyList_Check(source) || PyTuple_Check(source);
2094
2095     if (!PySequence_Check(source)) {
2096         goto error0;
2097     }
2098
2099     // The length of the sequence is returned in count.
2100     *count = PySequence_Length(source);
2101     if (*count < 0) {
2102         goto error0;
2103     }
2104
2105     temp = new wxPoint[*count];
2106     if (!temp) {
2107         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
2108         return NULL;
2109     }
2110     for (x=0; x<*count; x++) {
2111         // Get an item: try fast way first.
2112         if (isFast) {
2113             o = PySequence_Fast_GET_ITEM(source, x);
2114         }
2115         else {
2116             o = PySequence_GetItem(source, x);
2117             if (o == NULL) {
2118                 goto error1;
2119             }
2120         }
2121
2122         // Convert o to wxPoint.
2123         if ((PyTuple_Check(o) && PyTuple_GET_SIZE(o) == 2) ||
2124             (PyList_Check(o) && PyList_GET_SIZE(o) == 2)) {
2125             o1 = PySequence_Fast_GET_ITEM(o, 0);
2126             o2 = PySequence_Fast_GET_ITEM(o, 1);
2127             if (!wxPointFromObjects(o1, o2, &temp[x])) {
2128                 goto error2;
2129             }
2130         }
2131         else if (wxPySwigInstance_Check(o)) {
2132             wxPoint* pt;
2133             if (! wxPyConvertSwigPtr(o, (void **)&pt, wxT("wxPoint"))) {
2134                 goto error2;
2135             }
2136             temp[x] = *pt;
2137         }
2138         else if (PySequence_Check(o) && PySequence_Length(o) == 2) {
2139             o1 = PySequence_GetItem(o, 0);
2140             o2 = PySequence_GetItem(o, 1);
2141             if (!wxPointFromObjects(o1, o2, &temp[x])) {
2142                 goto error3;
2143             }
2144             Py_DECREF(o1);
2145             Py_DECREF(o2);
2146         }
2147         else {
2148             goto error2;
2149         }
2150         // Clean up.
2151         if (!isFast)
2152             Py_DECREF(o);
2153     }
2154     return temp;
2155
2156 error3:
2157     Py_DECREF(o1);
2158     Py_DECREF(o2);
2159 error2:
2160     if (!isFast)
2161         Py_DECREF(o);
2162 error1:
2163     delete [] temp;
2164 error0:
2165     PyErr_SetString(PyExc_TypeError, "Expected a sequence of length-2 sequences or wxPoints.");
2166     return NULL;
2167 }
2168 // end of patch
2169 //------------------------------
2170
2171
2172 wxBitmap** wxBitmap_LIST_helper(PyObject* source) {
2173     if (!PyList_Check(source)) {
2174         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
2175         return NULL;
2176     }
2177     int count = PyList_Size(source);
2178     wxBitmap** temp = new wxBitmap*[count];
2179     if (! temp) {
2180         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
2181         return NULL;
2182     }
2183     for (int x=0; x<count; x++) {
2184         PyObject* o = PyList_GetItem(source, x);
2185         if (wxPySwigInstance_Check(o)) {
2186             wxBitmap*    pt;
2187             if (! wxPyConvertSwigPtr(o, (void **) &pt, wxT("wxBitmap"))) {
2188                 PyErr_SetString(PyExc_TypeError,"Expected wxBitmap.");
2189                 return NULL;
2190             }
2191             temp[x] = pt;
2192         }
2193         else {
2194             PyErr_SetString(PyExc_TypeError, "Expected a list of wxBitmaps.");
2195             return NULL;
2196         }
2197     }
2198     return temp;
2199 }
2200
2201
2202
2203 wxString* wxString_LIST_helper(PyObject* source) {
2204     if (!PyList_Check(source)) {
2205         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
2206         return NULL;
2207     }
2208     int count = PyList_Size(source);
2209     wxString* temp = new wxString[count];
2210     if (! temp) {
2211         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
2212         return NULL;
2213     }
2214     for (int x=0; x<count; x++) {
2215         PyObject* o = PyList_GetItem(source, x);
2216 #if PYTHON_API_VERSION >= 1009
2217         if (! PyString_Check(o) && ! PyUnicode_Check(o)) {
2218             PyErr_SetString(PyExc_TypeError, "Expected a list of string or unicode objects.");
2219             return NULL;
2220         }
2221 #else
2222         if (! PyString_Check(o)) {
2223             PyErr_SetString(PyExc_TypeError, "Expected a list of strings.");
2224             return NULL;
2225         }
2226 #endif
2227
2228         wxString* pStr = wxString_in_helper(o);
2229         temp[x] = *pStr;
2230         delete pStr;
2231     }
2232     return temp;
2233 }
2234
2235
2236 wxAcceleratorEntry* wxAcceleratorEntry_LIST_helper(PyObject* source) {
2237     if (!PyList_Check(source)) {
2238         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
2239         return NULL;
2240     }
2241     int count                = PyList_Size(source);
2242     wxAcceleratorEntry* temp = new wxAcceleratorEntry[count];
2243     if (! temp) {
2244         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
2245         return NULL;
2246     }
2247     for (int x=0; x<count; x++) {
2248         PyObject* o = PyList_GetItem(source, x);
2249         if (wxPySwigInstance_Check(o)) {
2250             wxAcceleratorEntry* ae;
2251             if (! wxPyConvertSwigPtr(o, (void **) &ae, wxT("wxAcceleratorEntry"))) {
2252                 PyErr_SetString(PyExc_TypeError,"Expected wxAcceleratorEntry.");
2253                 return NULL;
2254             }
2255             temp[x] = *ae;
2256         }
2257         else if (PyTuple_Check(o)) {
2258             PyObject* o1 = PyTuple_GetItem(o, 0);
2259             PyObject* o2 = PyTuple_GetItem(o, 1);
2260             PyObject* o3 = PyTuple_GetItem(o, 2);
2261             temp[x].Set(PyInt_AsLong(o1), PyInt_AsLong(o2), PyInt_AsLong(o3));
2262         }
2263         else {
2264             PyErr_SetString(PyExc_TypeError, "Expected a list of 3-tuples or wxAcceleratorEntry objects.");
2265             return NULL;
2266         }
2267     }
2268     return temp;
2269 }
2270
2271
2272 wxPen** wxPen_LIST_helper(PyObject* source) {
2273     if (!PyList_Check(source)) {
2274         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
2275         return NULL;
2276     }
2277     int count = PyList_Size(source);
2278     wxPen** temp = new wxPen*[count];
2279     if (!temp) {
2280         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
2281         return NULL;
2282     }
2283     for (int x=0; x<count; x++) {
2284         PyObject* o = PyList_GetItem(source, x);
2285         if (wxPySwigInstance_Check(o)) {
2286             wxPen*  pt;
2287             if (! wxPyConvertSwigPtr(o, (void **)&pt, wxT("wxPen"))) {
2288                 delete temp;
2289                 PyErr_SetString(PyExc_TypeError,"Expected wxPen.");
2290                 return NULL;
2291             }
2292             temp[x] = pt;
2293         }
2294         else {
2295             delete temp;
2296             PyErr_SetString(PyExc_TypeError, "Expected a list of wxPens.");
2297             return NULL;
2298         }
2299     }
2300     return temp;
2301 }
2302
2303
2304 bool wxPy2int_seq_helper(PyObject* source, int* i1, int* i2) {
2305     bool isFast = PyList_Check(source) || PyTuple_Check(source);
2306     PyObject *o1, *o2;
2307
2308     if (!PySequence_Check(source) || PySequence_Length(source) != 2)
2309         return False;
2310
2311     if (isFast) {
2312         o1 = PySequence_Fast_GET_ITEM(source, 0);
2313         o2 = PySequence_Fast_GET_ITEM(source, 1);
2314     }
2315     else {
2316         o1 = PySequence_GetItem(source, 0);
2317         o2 = PySequence_GetItem(source, 1);
2318     }
2319
2320     *i1 = PyInt_AsLong(o1);
2321     *i2 = PyInt_AsLong(o2);
2322
2323     if (! isFast) {
2324         Py_DECREF(o1);
2325         Py_DECREF(o2);
2326     }
2327     return True;
2328 }
2329
2330
2331 bool wxPy4int_seq_helper(PyObject* source, int* i1, int* i2, int* i3, int* i4) {
2332     bool isFast = PyList_Check(source) || PyTuple_Check(source);
2333     PyObject *o1, *o2, *o3, *o4;
2334
2335     if (!PySequence_Check(source) || PySequence_Length(source) != 4)
2336         return False;
2337
2338     if (isFast) {
2339         o1 = PySequence_Fast_GET_ITEM(source, 0);
2340         o2 = PySequence_Fast_GET_ITEM(source, 1);
2341         o3 = PySequence_Fast_GET_ITEM(source, 2);
2342         o4 = PySequence_Fast_GET_ITEM(source, 3);
2343     }
2344     else {
2345         o1 = PySequence_GetItem(source, 0);
2346         o2 = PySequence_GetItem(source, 1);
2347         o3 = PySequence_GetItem(source, 2);
2348         o4 = PySequence_GetItem(source, 3);
2349     }
2350
2351     *i1 = PyInt_AsLong(o1);
2352     *i2 = PyInt_AsLong(o2);
2353     *i3 = PyInt_AsLong(o3);
2354     *i4 = PyInt_AsLong(o4);
2355
2356     if (! isFast) {
2357         Py_DECREF(o1);
2358         Py_DECREF(o2);
2359         Py_DECREF(o3);
2360         Py_DECREF(o4);
2361     }
2362     return True;
2363 }
2364
2365
2366 //----------------------------------------------------------------------
2367
2368 bool wxPySimple_typecheck(PyObject* source, const wxChar* classname, int seqLen)
2369 {
2370     void* ptr;
2371
2372     if (wxPySwigInstance_Check(source) &&
2373         wxPyConvertSwigPtr(source, (void **)&ptr, classname))
2374         return True;
2375
2376     PyErr_Clear();
2377     if (PySequence_Check(source) && PySequence_Length(source) == seqLen)
2378         return True;
2379
2380     return False;
2381 }
2382
2383 bool wxSize_helper(PyObject* source, wxSize** obj)
2384 {
2385     if (source == Py_None) {
2386         **obj = wxSize(-1,-1);
2387         return True;
2388     }
2389     return wxPyTwoIntItem_helper(source, obj, wxT("wxSize"));
2390 }
2391
2392
2393 bool wxPoint_helper(PyObject* source, wxPoint** obj)
2394 {
2395     if (source == Py_None) {
2396         **obj = wxPoint(-1,-1);
2397         return True;
2398     }
2399     return wxPyTwoIntItem_helper(source, obj, wxT("wxPoint"));
2400 }
2401
2402
2403
2404 bool wxRealPoint_helper(PyObject* source, wxRealPoint** obj) {
2405
2406     if (source == Py_None) {
2407         **obj = wxRealPoint(-1,-1);
2408         return True;
2409     }
2410
2411     // If source is an object instance then it may already be the right type
2412     if (wxPySwigInstance_Check(source)) {
2413         wxRealPoint* ptr;
2414         if (! wxPyConvertSwigPtr(source, (void **)&ptr, wxT("wxRealPoint")))
2415             goto error;
2416         *obj = ptr;
2417         return True;
2418     }
2419     // otherwise a 2-tuple of floats is expected
2420     else if (PySequence_Check(source) && PyObject_Length(source) == 2) {
2421         PyObject* o1 = PySequence_GetItem(source, 0);
2422         PyObject* o2 = PySequence_GetItem(source, 1);
2423         if (!PyNumber_Check(o1) || !PyNumber_Check(o2)) {
2424             Py_DECREF(o1);
2425             Py_DECREF(o2);
2426             goto error;
2427         }
2428         **obj = wxRealPoint(PyFloat_AsDouble(o1), PyFloat_AsDouble(o2));
2429         Py_DECREF(o1);
2430         Py_DECREF(o2);
2431         return True;
2432     }
2433
2434  error:
2435     PyErr_SetString(PyExc_TypeError, "Expected a 2-tuple of floats or a wxRealPoint object.");
2436     return False;
2437 }
2438
2439
2440
2441 bool wxRect_helper(PyObject* source, wxRect** obj) {
2442
2443     if (source == Py_None) {
2444         **obj = wxRect(-1,-1,-1,-1);
2445         return True;
2446     }
2447
2448     // If source is an object instance then it may already be the right type
2449     if (wxPySwigInstance_Check(source)) {
2450         wxRect* ptr;
2451         if (! wxPyConvertSwigPtr(source, (void **)&ptr, wxT("wxRect")))
2452             goto error;
2453         *obj = ptr;
2454         return True;
2455     }
2456     // otherwise a 4-tuple of integers is expected
2457     else if (PySequence_Check(source) && PyObject_Length(source) == 4) {
2458         PyObject* o1 = PySequence_GetItem(source, 0);
2459         PyObject* o2 = PySequence_GetItem(source, 1);
2460         PyObject* o3 = PySequence_GetItem(source, 2);
2461         PyObject* o4 = PySequence_GetItem(source, 3);
2462         if (!PyNumber_Check(o1) || !PyNumber_Check(o2) ||
2463             !PyNumber_Check(o3) || !PyNumber_Check(o4)) {
2464             Py_DECREF(o1);
2465             Py_DECREF(o2);
2466             Py_DECREF(o3);
2467             Py_DECREF(o4);
2468             goto error;
2469         }
2470         **obj = wxRect(PyInt_AsLong(o1), PyInt_AsLong(o2),
2471                        PyInt_AsLong(o3), PyInt_AsLong(o4));
2472         Py_DECREF(o1);
2473         Py_DECREF(o2);
2474         Py_DECREF(o3);
2475         Py_DECREF(o4);
2476         return True;
2477     }
2478
2479  error:
2480     PyErr_SetString(PyExc_TypeError, "Expected a 4-tuple of integers or a wxRect object.");
2481     return False;
2482 }
2483
2484
2485
2486 bool wxColour_helper(PyObject* source, wxColour** obj) {
2487
2488     if (source == Py_None) {
2489         **obj = wxNullColour;
2490         return True;
2491     }
2492
2493     // If source is an object instance then it may already be the right type
2494     if (wxPySwigInstance_Check(source)) {
2495         wxColour* ptr;
2496         if (! wxPyConvertSwigPtr(source, (void **)&ptr, wxT("wxColour")))
2497             goto error;
2498         *obj = ptr;
2499         return True;
2500     }
2501     // otherwise check for a string
2502     else if (PyString_Check(source) || PyUnicode_Check(source)) {
2503         wxString spec = Py2wxString(source);
2504         if (spec.GetChar(0) == '#' && spec.Length() == 7) {  // It's  #RRGGBB
2505             long red, green, blue;
2506             red = green = blue = 0;
2507             spec.Mid(1,2).ToLong(&red,   16);
2508             spec.Mid(3,2).ToLong(&green, 16);
2509             spec.Mid(5,2).ToLong(&blue,  16);
2510
2511             **obj = wxColour(red, green, blue);
2512             return True;
2513         }
2514         else {                                       // it's a colour name
2515             **obj = wxColour(spec);
2516             return True;
2517         }
2518     }
2519     // last chance: 3-tuple of integers is expected
2520     else if (PySequence_Check(source) && PyObject_Length(source) == 3) {
2521         PyObject* o1 = PySequence_GetItem(source, 0);
2522         PyObject* o2 = PySequence_GetItem(source, 1);
2523         PyObject* o3 = PySequence_GetItem(source, 2);
2524         if (!PyNumber_Check(o1) || !PyNumber_Check(o2) || !PyNumber_Check(o3)) {
2525             Py_DECREF(o1);
2526             Py_DECREF(o2);
2527             Py_DECREF(o3);
2528             goto error;
2529         }
2530         **obj = wxColour(PyInt_AsLong(o1), PyInt_AsLong(o2), PyInt_AsLong(o3));
2531         Py_DECREF(o1);
2532         Py_DECREF(o2);
2533         Py_DECREF(o3);
2534         return True;
2535     }
2536
2537  error:
2538     PyErr_SetString(PyExc_TypeError,
2539                     "Expected a wxColour object or a string containing a colour name or '#RRGGBB'.");
2540     return False;
2541 }
2542
2543
2544 bool wxColour_typecheck(PyObject* source) {
2545
2546     if (wxPySimple_typecheck(source, wxT("wxColour"), 3))
2547         return True;
2548
2549     if (PyString_Check(source) || PyUnicode_Check(source))
2550         return True;
2551
2552     return False;
2553 }
2554
2555
2556
2557 bool wxPoint2D_helper(PyObject* source, wxPoint2D** obj) {
2558
2559     if (source == Py_None) {
2560         **obj = wxPoint2D(-1,-1);
2561         return True;
2562     }
2563
2564     // If source is an object instance then it may already be the right type
2565     if (wxPySwigInstance_Check(source)) {
2566         wxPoint2D* ptr;
2567         if (! wxPyConvertSwigPtr(source, (void **)&ptr, wxT("wxPoint2D")))
2568             goto error;
2569         *obj = ptr;
2570         return True;
2571     }
2572     // otherwise a length-2 sequence of floats is expected
2573     if (PySequence_Check(source) && PySequence_Length(source) == 2) {
2574         PyObject* o1 = PySequence_GetItem(source, 0);
2575         PyObject* o2 = PySequence_GetItem(source, 1);
2576         // This should really check for floats, not numbers -- but that would break code.
2577         if (!PyNumber_Check(o1) || !PyNumber_Check(o2)) {
2578             Py_DECREF(o1);
2579             Py_DECREF(o2);
2580             goto error;
2581         }
2582         **obj = wxPoint2D(PyFloat_AsDouble(o1), PyFloat_AsDouble(o2));
2583         Py_DECREF(o1);
2584         Py_DECREF(o2);
2585         return True;
2586     }
2587  error:
2588     PyErr_SetString(PyExc_TypeError, "Expected a 2-tuple of floats or a wxPoint2D object.");
2589     return False;
2590 }
2591
2592
2593 //----------------------------------------------------------------------
2594
2595 PyObject* wxArrayString2PyList_helper(const wxArrayString& arr) {
2596
2597     PyObject* list = PyList_New(0);
2598     for (size_t i=0; i < arr.GetCount(); i++) {
2599 #if wxUSE_UNICODE
2600         PyObject* str = PyUnicode_FromWideChar(arr[i].c_str(), arr[i].Len());
2601 #else
2602         PyObject* str = PyString_FromStringAndSize(arr[i].c_str(), arr[i].Len());
2603 #endif
2604         PyList_Append(list, str);
2605         Py_DECREF(str);
2606     }
2607     return list;
2608 }
2609
2610
2611 PyObject* wxArrayInt2PyList_helper(const wxArrayInt& arr) {
2612
2613     PyObject* list = PyList_New(0);
2614     for (size_t i=0; i < arr.GetCount(); i++) {
2615         PyObject* number = PyInt_FromLong(arr[i]);
2616         PyList_Append(list, number);
2617         Py_DECREF(number);
2618     }
2619     return list;
2620 }
2621
2622
2623 //----------------------------------------------------------------------
2624 //----------------------------------------------------------------------
2625
2626
2627
2628