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:     7/1/97
   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 "helpers.h"
  17 #include "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 <gtk/gtk.h>
  27 #include <gdk/gdkprivate.h>
  28 #include <wx/gtk/win_gtk.h>
  29 #endif
  30
  31 //----------------------------------------------------------------------
  32
  33 #if PYTHON_API_VERSION <= 1007 && wxUSE_UNICODE
  34 #error Python must support Unicode to use wxWindows Unicode
  35 #endif
  36
  37 //----------------------------------------------------------------------
  38
  39 #ifdef __WXGTK__
  40 int  WXDLLEXPORT wxEntryStart( int& argc, char** argv );
  41 #else
  42 int  WXDLLEXPORT wxEntryStart( int argc, char** argv );
  43 #endif
  44 int  WXDLLEXPORT wxEntryInitGui();
  45 void WXDLLEXPORT wxEntryCleanup();
  46
  47 wxPyApp* wxPythonApp = NULL;  // Global instance of application object
  48 bool wxPyDoCleanup = FALSE;
  49
  50
  51 #ifdef WXP_WITH_THREAD
  52 struct wxPyThreadState {
  53     unsigned long  tid;
  54     PyThreadState* tstate;
  55
  56     wxPyThreadState(unsigned long _tid=0, PyThreadState* _tstate=NULL)
  57         : tid(_tid), tstate(_tstate) {}
  58 };
  59
  60 #include <wx/dynarray.h>
  61 WX_DECLARE_OBJARRAY(wxPyThreadState, wxPyThreadStateArray);
  62 #include <wx/arrimpl.cpp>
  63 WX_DEFINE_OBJARRAY(wxPyThreadStateArray);
  64
  65 wxPyThreadStateArray* wxPyTStates = NULL;
  66 wxMutex*              wxPyTMutex = NULL;
  67 #endif
  68
  69
  70 #ifdef __WXMSW__             // If building for win32...
  71 //----------------------------------------------------------------------
  72 // This gets run when the DLL is loaded.  We just need to save a handle.
  73 //----------------------------------------------------------------------
  74
  75 BOOL WINAPI DllMain(
  76     HINSTANCE   hinstDLL,    // handle to DLL module
  77     DWORD       fdwReason,   // reason for calling function
  78     LPVOID      lpvReserved  // reserved
  79    )
  80 {
  81     // If wxPython is embedded in another wxWindows app then
  82     // the inatance has already been set.
  83     if (! wxGetInstance())
  84         wxSetInstance(hinstDLL);
  85     return TRUE;
  86 }
  87 #endif
  88
  89 //----------------------------------------------------------------------
  90 // Classes for implementing the wxp main application shell.
  91 //----------------------------------------------------------------------
  92
  93
  94 wxPyApp::wxPyApp() {
  95     SetUseBestVisual(TRUE);
  96 }
  97
  98 wxPyApp::~wxPyApp() {
  99 }
 100
 101
 102 // This one isn't acutally called...  See __wxStart()
 103 bool wxPyApp::OnInit() {
 104     return FALSE;
 105 }
 106
 107
 108 int  wxPyApp::MainLoop() {
 109     int retval = 0;
 110
 111     DeletePendingObjects();
 112     bool initialized = wxTopLevelWindows.GetCount() != 0;
 113 #ifdef __WXGTK__
 114     m_initialized = initialized;
 115 #endif
 116
 117     if (initialized) {
 118         retval = wxApp::MainLoop();
 119         OnExit();
 120     }
 121     return retval;
 122 }
 123
 124
 125
 126 //---------------------------------------------------------------------
 127 //----------------------------------------------------------------------
 128
 129
 130 static char* wxPyCopyCString(const wxChar* src)
 131 {
 132     wxWX2MBbuf buff = (wxWX2MBbuf)wxConvCurrent->cWX2MB(src);
 133     size_t len = strlen(buff);
 134     char*  dest = new char[len+1];
 135     strcpy(dest, buff);
 136     return dest;
 137 }
 138
 139 #if wxUSE_UNICODE
 140 static char* wxPyCopyCString(const char* src)   // we need a char version too
 141 {
 142     size_t len = strlen(src);
 143     char*  dest = new char[len+1];
 144     strcpy(dest, src);
 145     return dest;
 146 }
 147 #endif
 148
 149 static wxChar* wxPyCopyWString(const char *src)
 150 {
 151     //wxMB2WXbuf buff = wxConvCurrent->cMB2WX(src);
 152     wxString str(src, *wxConvCurrent);
 153     return copystring(str);
 154 }
 155
 156 #if wxUSE_UNICODE
 157 static wxChar* wxPyCopyWString(const wxChar *src)
 158 {
 159     return copystring(src);
 160 }
 161 #endif
 162
 163
 164 //----------------------------------------------------------------------
 165
 166 // This is where we pick up the first part of the wxEntry functionality...
 167 // The rest is in __wxStart and  __wxCleanup.  This function is called when
 168 // wxcmodule is imported.  (Before there is a wxApp object.)
 169 void __wxPreStart()
 170 {
 171
 172 #ifdef __WXMSW__
 173 //    wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 174 #endif
 175
 176 #ifdef WXP_WITH_THREAD
 177     PyEval_InitThreads();
 178     wxPyTStates = new wxPyThreadStateArray;
 179     wxPyTMutex = new wxMutex;
 180 #endif
 181
 182     wxApp::CheckBuildOptions(wxBuildOptions());
 183
 184     // Bail out if there is already a wxApp created.  This means that the
 185     // toolkit has already been initialized, as in embedding wxPython in
 186     // a C++ wxWindows app, so we don't need to call wxEntryStart.
 187     if (wxTheApp != NULL) {
 188         return;
 189     }
 190     wxPyDoCleanup = TRUE;
 191
 192     int argc = 0;
 193     char** argv = NULL;
 194     PyObject* sysargv = PySys_GetObject("argv");
 195     if (sysargv != NULL) {
 196         argc = PyList_Size(sysargv);
 197         argv = new char*[argc+1];
 198         int x;
 199         for(x=0; x<argc; x++) {
 200             PyObject *item = PyList_GetItem(sysargv, x);
 201 #if wxUSE_UNICODE
 202             if (PyUnicode_Check(item))
 203                 argv[x] = wxPyCopyCString(PyUnicode_AS_UNICODE(item));
 204             else
 205 #endif
 206                 argv[x] = wxPyCopyCString(PyString_AsString(item));
 207         }
 208         argv[argc] = NULL;
 209     }
 210
 211     wxEntryStart(argc, argv);
 212     delete [] argv;
 213 }
 214
 215
 216
 217 // Start the user application, user App's OnInit method is a parameter here
 218 PyObject* __wxStart(PyObject* /* self */, PyObject* args)
 219 {
 220     PyObject*   onInitFunc = NULL;
 221     PyObject*   arglist;
 222     PyObject*   result;
 223     long        bResult;
 224
 225     if (!PyArg_ParseTuple(args, "O", &onInitFunc))
 226         return NULL;
 227
 228     // This is the next part of the wxEntry functionality...
 229     int argc = 0;
 230     wxChar** argv = NULL;
 231     PyObject* sysargv = PySys_GetObject("argv");
 232     if (sysargv != NULL) {
 233         argc = PyList_Size(sysargv);
 234         argv = new wxChar*[argc+1];
 235         int x;
 236         for(x=0; x<argc; x++) {
 237             PyObject *pyArg = PyList_GetItem(sysargv, x);
 238 #if wxUSE_UNICODE
 239             if (PyUnicode_Check(pyArg))
 240                 argv[x] = wxPyCopyWString(PyUnicode_AS_UNICODE(pyArg));
 241             else
 242 #endif
 243                 argv[x] = wxPyCopyWString(PyString_AsString(pyArg));
 244         }
 245         argv[argc] = NULL;
 246     }
 247
 248     wxPythonApp->argc = argc;
 249     wxPythonApp->argv = argv;
 250
 251     wxEntryInitGui();
 252
 253     // Call the Python App's OnInit function
 254     arglist = PyTuple_New(0);
 255     result = PyEval_CallObject(onInitFunc, arglist);
 256     if (!result) {      // an exception was raised.
 257         return NULL;
 258     }
 259
 260     if (! PyInt_Check(result)) {
 261         PyErr_SetString(PyExc_TypeError, "OnInit should return a boolean value");
 262         return NULL;
 263     }
 264     bResult = PyInt_AS_LONG(result);
 265     if (! bResult) {
 266         PyErr_SetString(PyExc_SystemExit, "OnInit returned FALSE, exiting...");
 267         return NULL;
 268     }
 269
 270 #ifdef __WXGTK__
 271     wxTheApp->m_initialized = (wxTopLevelWindows.GetCount() > 0);
 272 #endif
 273
 274     Py_INCREF(Py_None);
 275     return Py_None;
 276 }
 277
 278
 279 void __wxCleanup() {
 280     if (wxPyDoCleanup)
 281         wxEntryCleanup();
 282 #ifdef WXP_WITH_THREAD
 283     delete wxPyTMutex;
 284     wxPyTMutex = NULL;
 285     wxPyTStates->Empty();
 286     delete wxPyTStates;
 287     wxPyTStates = NULL;
 288 #endif
 289 }
 290
 291
 292
 293 static PyObject* wxPython_dict = NULL;
 294 static PyObject* wxPyPtrTypeMap = NULL;
 295
 296
 297 PyObject* __wxSetDictionary(PyObject* /* self */, PyObject* args)
 298 {
 299
 300     if (!PyArg_ParseTuple(args, "O", &wxPython_dict))
 301         return NULL;
 302
 303     if (!PyDict_Check(wxPython_dict)) {
 304         PyErr_SetString(PyExc_TypeError, "_wxSetDictionary must have dictionary object!");
 305         return NULL;
 306     }
 307
 308     if (! wxPyPtrTypeMap)
 309         wxPyPtrTypeMap = PyDict_New();
 310     PyDict_SetItemString(wxPython_dict, "__wxPyPtrTypeMap", wxPyPtrTypeMap);
 311
 312
 313 #ifdef __WXMOTIF__
 314 #define wxPlatform "__WXMOTIF__"
 315 #endif
 316 #ifdef __WXX11__
 317 #define wxPlatform "__WXX11__"
 318 #endif
 319 #ifdef __WXGTK__
 320 #define wxPlatform "__WXGTK__"
 321 #endif
 322 #if defined(__WIN32__) || defined(__WXMSW__)
 323 #define wxPlatform "__WXMSW__"
 324 #endif
 325 #ifdef __WXMAC__
 326 #define wxPlatform "__WXMAC__"
 327 #endif
 328
 329     PyDict_SetItemString(wxPython_dict, "wxPlatform", PyString_FromString(wxPlatform));
 330     PyDict_SetItemString(wxPython_dict, "wxUSE_UNICODE", PyInt_FromLong(wxUSE_UNICODE));
 331
 332     Py_INCREF(Py_None);
 333     return Py_None;
 334 }
 335
 336 //---------------------------------------------------------------------------
 337
 338 void wxPyClientData_dtor(wxPyClientData* self) {
 339     wxPyBeginBlockThreads();
 340     Py_DECREF(self->m_obj);
 341     wxPyEndBlockThreads();
 342 }
 343
 344 void wxPyUserData_dtor(wxPyUserData* self) {
 345     wxPyBeginBlockThreads();
 346     Py_DECREF(self->m_obj);
 347     wxPyEndBlockThreads();
 348 }
 349
 350
 351 // This is called when an OOR controled object is being destroyed.  Although
 352 // the C++ object is going away there is no way to force the Python object
 353 // (and all references to it) to die too.  This causes problems (crashes) in
 354 // wxPython when a python shadow object attempts to call a C++ method using
 355 // the now bogus pointer... So to try and prevent this we'll do a little black
 356 // magic and change the class of the python instance to a class that will
 357 // raise an exception for any attempt to call methods with it.  See
 358 // _wxPyDeadObject in _extras.py for the implementation of this class.
 359 void wxPyOORClientData_dtor(wxPyOORClientData* self) {
 360
 361     static PyObject* deadObjectClass = NULL;
 362
 363     wxPyBeginBlockThreads();
 364     if (deadObjectClass == NULL) {
 365         deadObjectClass = PyDict_GetItemString(wxPython_dict, "_wxPyDeadObject");
 366         wxASSERT_MSG(deadObjectClass != NULL, wxT("Can't get _wxPyDeadObject class!"));
 367         Py_INCREF(deadObjectClass);
 368     }
 369
 370     // Clear the instance's dictionary, put the name of the old class into the
 371     // instance, and then reset the class to be the dead class.
 372     if (self->m_obj->ob_refcnt > 1) {  // but only if there is more than one reference
 373         wxASSERT_MSG(PyInstance_Check(self->m_obj), wxT("m_obj not an instance!?!?!"));
 374         PyInstanceObject* inst = (PyInstanceObject*)self->m_obj;
 375         PyDict_Clear(inst->in_dict);
 376         PyDict_SetItemString(inst->in_dict, "_name", inst->in_class->cl_name);
 377         inst->in_class = (PyClassObject*)deadObjectClass;
 378         Py_INCREF(deadObjectClass);
 379     }
 380     wxPyEndBlockThreads();
 381 }
 382
 383 //---------------------------------------------------------------------------
 384 // Stuff used by OOR to find the right wxPython class type to return and to
 385 // build it.
 386
 387
 388 // The pointer type map is used when the "pointer" type name generated by SWIG
 389 // is not the same as the shadow class name, for example wxPyTreeCtrl
 390 // vs. wxTreeCtrl.  It needs to be referenced in Python as well as from C++,
 391 // so we'll just make it a Python dictionary in the wx module's namespace.
 392 // (See __wxSetDictionary)
 393 void wxPyPtrTypeMap_Add(const char* commonName, const char* ptrName) {
 394     if (! wxPyPtrTypeMap)
 395         wxPyPtrTypeMap = PyDict_New();
 396     PyDict_SetItemString(wxPyPtrTypeMap,
 397                          (char*)commonName,
 398                          PyString_FromString((char*)ptrName));
 399 }
 400
 401
 402
 403 PyObject* wxPyClassExists(const wxString& className) {
 404
 405     if (!className)
 406         return NULL;
 407
 408     char    buff[64];               // should always be big enough...
 409
 410     sprintf(buff, "%sPtr", className.mbc_str());
 411     PyObject* classobj = PyDict_GetItemString(wxPython_dict, buff);
 412
 413     return classobj;  // returns NULL if not found
 414 }
 415
 416
 417 PyObject*  wxPyMake_wxObject(wxObject* source, bool checkEvtHandler) {
 418     PyObject* target = NULL;
 419     bool      isEvtHandler = FALSE;
 420
 421     if (source) {
 422         // If it's derived from wxEvtHandler then there may
 423         // already be a pointer to a Python object that we can use
 424         // in the OOR data.
 425         if (checkEvtHandler && wxIsKindOf(source, wxEvtHandler)) {
 426             isEvtHandler = TRUE;
 427             wxEvtHandler* eh = (wxEvtHandler*)source;
 428             wxPyOORClientData* data = (wxPyOORClientData*)eh->GetClientObject();
 429             if (data) {
 430                 target = data->m_obj;
 431                 Py_INCREF(target);
 432             }
 433         }
 434
 435         if (! target) {
 436             // Otherwise make it the old fashioned way by making a
 437             // new shadow object and putting this pointer in it.
 438             wxClassInfo* info = source->GetClassInfo();
 439             wxChar*      name = (wxChar*)info->GetClassName();
 440             PyObject*    klass = wxPyClassExists(name);
 441             while (info && !klass) {
 442                 name = (wxChar*)info->GetBaseClassName1();
 443                 info = wxClassInfo::FindClass(name);
 444                 klass = wxPyClassExists(name);
 445             }
 446             if (info) {
 447                 target = wxPyConstructObject(source, name, klass, FALSE);
 448                 if (target && isEvtHandler)
 449                     ((wxEvtHandler*)source)->SetClientObject(new wxPyOORClientData(target));
 450             } else {
 451                 wxString msg(wxT("wxPython class not found for "));
 452                 msg += source->GetClassInfo()->GetClassName();
 453                 PyErr_SetString(PyExc_NameError, msg.mbc_str());
 454                 target = NULL;
 455             }
 456         }
 457     } else {  // source was NULL so return None.
 458         Py_INCREF(Py_None); target = Py_None;
 459     }
 460     return target;
 461 }
 462
 463
 464 PyObject*  wxPyMake_wxSizer(wxSizer* source) {
 465     PyObject* target = NULL;
 466
 467     if (source && wxIsKindOf(source, wxSizer)) {
 468         // If it's derived from wxSizer then there may
 469         // already be a pointer to a Python object that we can use
 470         // in the OOR data.
 471         wxSizer* sz = (wxSizer*)source;
 472         wxPyOORClientData* data = (wxPyOORClientData*)sz->GetClientObject();
 473         if (data) {
 474             target = data->m_obj;
 475             Py_INCREF(target);
 476         }
 477     }
 478     if (! target) {
 479         target = wxPyMake_wxObject(source, FALSE);
 480         if (target != Py_None)
 481             ((wxSizer*)source)->SetClientObject(new wxPyOORClientData(target));
 482     }
 483     return target;
 484 }
 485
 486
 487
 488 //---------------------------------------------------------------------------
 489
 490 PyObject* wxPyConstructObject(void* ptr,
 491                               const wxString& className,
 492                               PyObject* klass,
 493                               int setThisOwn) {
 494
 495     PyObject* obj;
 496     PyObject* arg;
 497     PyObject* item;
 498     wxString  name(className);
 499     char      swigptr[64];      // should always be big enough...
 500     char      buff[64];
 501
 502     if ((item = PyDict_GetItemString(wxPyPtrTypeMap, (char*)(const char*)name.mbc_str())) != NULL) {
 503         name = wxString(PyString_AsString(item), *wxConvCurrent);
 504     }
 505     sprintf(buff, "_%s_p", (const char*)name.mbc_str());
 506     SWIG_MakePtr(swigptr, ptr, buff);
 507
 508     arg = Py_BuildValue("(s)", swigptr);
 509     obj = PyInstance_New(klass, arg, NULL);
 510     Py_DECREF(arg);
 511
 512     if (setThisOwn) {
 513         PyObject* one = PyInt_FromLong(1);
 514         PyObject_SetAttrString(obj, "thisown", one);
 515         Py_DECREF(one);
 516     }
 517
 518     return obj;
 519 }
 520
 521
 522 PyObject* wxPyConstructObject(void* ptr,
 523                               const wxString& className,
 524                               int setThisOwn) {
 525     if (!ptr) {
 526         Py_INCREF(Py_None);
 527         return Py_None;
 528     }
 529
 530     char    buff[64];               // should always be big enough...
 531     sprintf(buff, "%sPtr", (const char*)className.mbc_str());
 532
 533     wxASSERT_MSG(wxPython_dict, wxT("wxPython_dict is not set yet!!"));
 534
 535     PyObject* classobj = PyDict_GetItemString(wxPython_dict, buff);
 536     if (! classobj) {
 537         wxString msg(wxT("wxPython class not found for "));
 538         msg += className;
 539         PyErr_SetString(PyExc_NameError, msg.mbc_str());
 540         return NULL;
 541     }
 542
 543     return wxPyConstructObject(ptr, className, classobj, setThisOwn);
 544 }
 545
 546
 547 //---------------------------------------------------------------------------
 548
 549
 550 #ifdef WXP_WITH_THREAD
 551 inline
 552 unsigned long wxPyGetCurrentThreadId() {
 553     return wxThread::GetCurrentId();
 554 }
 555
 556 static PyThreadState* gs_shutdownTState;
 557 static
 558 PyThreadState* wxPyGetThreadState() {
 559     if (wxPyTMutex == NULL) // Python is shutting down...
 560         return gs_shutdownTState;
 561
 562     unsigned long ctid = wxPyGetCurrentThreadId();
 563     PyThreadState* tstate = NULL;
 564
 565     wxPyTMutex->Lock();
 566     for(size_t i=0; i < wxPyTStates->GetCount(); i++) {
 567         wxPyThreadState& info = wxPyTStates->Item(i);
 568         if (info.tid == ctid) {
 569             tstate = info.tstate;
 570             break;
 571         }
 572     }
 573     wxPyTMutex->Unlock();
 574     wxASSERT_MSG(tstate, wxT("PyThreadState should not be NULL!"));
 575     return tstate;
 576 }
 577
 578 static
 579 void wxPySaveThreadState(PyThreadState* tstate) {
 580     if (wxPyTMutex == NULL) { // Python is shutting down, assume a single thread...
 581         gs_shutdownTState = tstate;
 582         return;
 583     }
 584     unsigned long ctid = wxPyGetCurrentThreadId();
 585     wxPyTMutex->Lock();
 586     for(size_t i=0; i < wxPyTStates->GetCount(); i++) {
 587         wxPyThreadState& info = wxPyTStates->Item(i);
 588         if (info.tid == ctid) {
 589             info.tstate = tstate;
 590             wxPyTMutex->Unlock();
 591             return;
 592         }
 593     }
 594     // not found, so add it...
 595     wxPyTStates->Add(new wxPyThreadState(ctid, tstate));
 596     wxPyTMutex->Unlock();
 597 }
 598
 599 #endif
 600
 601
 602 // Calls from Python to wxWindows code are wrapped in calls to these
 603 // functions:
 604
 605 PyThreadState* wxPyBeginAllowThreads() {
 606 #ifdef WXP_WITH_THREAD
 607     PyThreadState* saved = PyEval_SaveThread();  // Py_BEGIN_ALLOW_THREADS;
 608     wxPySaveThreadState(saved);
 609     return saved;
 610 #else
 611     return NULL;
 612 #endif
 613 }
 614
 615 void wxPyEndAllowThreads(PyThreadState* saved) {
 616 #ifdef WXP_WITH_THREAD
 617     PyEval_RestoreThread(saved);   // Py_END_ALLOW_THREADS;
 618 #endif
 619 }
 620
 621
 622
 623 // Calls from wxWindows back to Python code, or even any PyObject
 624 // manipulations, PyDECREF's and etc. are wrapped in calls to these functions:
 625
 626 void wxPyBeginBlockThreads() {
 627 #ifdef WXP_WITH_THREAD
 628     PyThreadState* tstate = wxPyGetThreadState();
 629     PyEval_RestoreThread(tstate);
 630 #endif
 631 }
 632
 633
 634 void wxPyEndBlockThreads() {
 635 #ifdef WXP_WITH_THREAD
 636     // Is there any need to save it again?
 637     // PyThreadState* tstate =
 638     PyEval_SaveThread();
 639 #endif
 640 }
 641
 642
 643 //---------------------------------------------------------------------------
 644 // wxPyInputStream and wxPyCBInputStream methods
 645
 646
 647 void wxPyInputStream::close() {
 648     /* do nothing for now */
 649 }
 650
 651 void wxPyInputStream::flush() {
 652     /* do nothing for now */
 653 }
 654
 655 bool wxPyInputStream::eof() {
 656     if (m_wxis)
 657         return m_wxis->Eof();
 658     else
 659         return TRUE;
 660 }
 661
 662 wxPyInputStream::~wxPyInputStream() {
 663     /* do nothing */
 664 }
 665
 666
 667
 668
 669 PyObject* wxPyInputStream::read(int size) {
 670     PyObject* obj = NULL;
 671     wxMemoryBuffer buf;
 672     const int BUFSIZE = 1024;
 673
 674     // check if we have a real wxInputStream to work with
 675     if (!m_wxis) {
 676         PyErr_SetString(PyExc_IOError, "no valid C-wxInputStream");
 677         return NULL;
 678     }
 679
 680     if (size < 0) {
 681         // read until EOF
 682         while (! m_wxis->Eof()) {
 683             m_wxis->Read(buf.GetAppendBuf(BUFSIZE), BUFSIZE);
 684             buf.UngetAppendBuf(m_wxis->LastRead());
 685         }
 686
 687     } else {  // Read only size number of characters
 688         m_wxis->Read(buf.GetWriteBuf(size), size);
 689         buf.UngetWriteBuf(m_wxis->LastRead());
 690     }
 691
 692     // error check
 693     if (m_wxis->LastError() == wxSTREAM_READ_ERROR) {
 694         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
 695     }
 696     else {
 697         // We use only strings for the streams, not unicode
 698         obj = PyString_FromStringAndSize(buf, buf.GetDataLen());
 699     }
 700     return obj;
 701 }
 702
 703
 704 PyObject* wxPyInputStream::readline(int size) {
 705     PyObject* obj = NULL;
 706     wxMemoryBuffer buf;
 707     int i;
 708     char ch;
 709
 710     // check if we have a real wxInputStream to work with
 711     if (!m_wxis) {
 712         PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream");
 713         return NULL;
 714     }
 715
 716     // read until \n or byte limit reached
 717     for (i=ch=0; (ch != '\n') && (!m_wxis->Eof()) && ((size < 0) || (i < size)); i++) {
 718         ch = m_wxis->GetC();
 719         buf.AppendByte(ch);
 720     }
 721
 722     // errorcheck
 723     if (m_wxis->LastError() == wxSTREAM_READ_ERROR) {
 724         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
 725     }
 726     else {
 727         // We use only strings for the streams, not unicode
 728         obj = PyString_FromStringAndSize((char*)buf.GetData(), buf.GetDataLen());
 729     }
 730     return obj;
 731 }
 732
 733
 734 PyObject* wxPyInputStream::readlines(int sizehint) {
 735     PyObject* pylist;
 736
 737     // check if we have a real wxInputStream to work with
 738     if (!m_wxis) {
 739         PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream below");
 740         return NULL;
 741     }
 742
 743     // init list
 744     pylist = PyList_New(0);
 745     if (!pylist) {
 746         PyErr_NoMemory();
 747         return NULL;
 748     }
 749
 750     // read sizehint bytes or until EOF
 751     int i;
 752     for (i=0; (!m_wxis->Eof()) && ((sizehint < 0) || (i < sizehint));) {
 753         PyObject* s = this->readline();
 754         if (s == NULL) {
 755             Py_DECREF(pylist);
 756             return NULL;
 757         }
 758         PyList_Append(pylist, s);
 759         i += PyString_Size(s);
 760     }
 761
 762     // error check
 763     if (m_wxis->LastError() == wxSTREAM_READ_ERROR) {
 764         Py_DECREF(pylist);
 765         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
 766         return NULL;
 767     }
 768
 769     return pylist;
 770 }
 771
 772
 773 void wxPyInputStream::seek(int offset, int whence) {
 774     if (m_wxis)
 775         m_wxis->SeekI(offset, wxSeekMode(whence));
 776 }
 777
 778 int wxPyInputStream::tell(){
 779     if (m_wxis)
 780         return m_wxis->TellI();
 781     else return 0;
 782 }
 783
 784
 785
 786
 787 wxPyCBInputStream::wxPyCBInputStream(PyObject *r, PyObject *s, PyObject *t, bool block)
 788     : wxInputStream(), m_read(r), m_seek(s), m_tell(t), m_block(block)
 789 {}
 790
 791
 792 wxPyCBInputStream::~wxPyCBInputStream() {
 793     if (m_block) wxPyBeginBlockThreads();
 794     Py_XDECREF(m_read);
 795     Py_XDECREF(m_seek);
 796     Py_XDECREF(m_tell);
 797     if (m_block) wxPyEndBlockThreads();
 798 }
 799
 800
 801 wxPyCBInputStream* wxPyCBInputStream::create(PyObject *py, bool block) {
 802     if (block) wxPyBeginBlockThreads();
 803
 804     PyObject* read = getMethod(py, "read");
 805     PyObject* seek = getMethod(py, "seek");
 806     PyObject* tell = getMethod(py, "tell");
 807
 808     if (!read) {
 809         PyErr_SetString(PyExc_TypeError, "Not a file-like object");
 810         Py_XDECREF(read);
 811         Py_XDECREF(seek);
 812         Py_XDECREF(tell);
 813         if (block) wxPyEndBlockThreads();
 814         return NULL;
 815     }
 816
 817     if (block) wxPyEndBlockThreads();
 818     return new wxPyCBInputStream(read, seek, tell, block);
 819 }
 820
 821 PyObject* wxPyCBInputStream::getMethod(PyObject* py, char* name) {
 822     if (!PyObject_HasAttrString(py, name))
 823         return NULL;
 824     PyObject* o = PyObject_GetAttrString(py, name);
 825     if (!PyMethod_Check(o) && !PyCFunction_Check(o)) {
 826         Py_DECREF(o);
 827         return NULL;
 828     }
 829     return o;
 830 }
 831
 832
 833 size_t wxPyCBInputStream::GetSize() const {
 834     wxPyCBInputStream* self = (wxPyCBInputStream*)this; // cast off const
 835     if (m_seek && m_tell) {
 836         off_t temp = self->OnSysTell();
 837         off_t ret = self->OnSysSeek(0, wxFromEnd);
 838         self->OnSysSeek(temp, wxFromStart);
 839         return ret;
 840     }
 841     else
 842         return 0;
 843 }
 844
 845
 846 size_t wxPyCBInputStream::OnSysRead(void *buffer, size_t bufsize) {
 847     if (bufsize == 0)
 848         return 0;
 849
 850     wxPyBeginBlockThreads();
 851     PyObject* arglist = Py_BuildValue("(i)", bufsize);
 852     PyObject* result = PyEval_CallObject(m_read, arglist);
 853     Py_DECREF(arglist);
 854
 855     size_t o = 0;
 856     if ((result != NULL) && PyString_Check(result)) {
 857         o = PyString_Size(result);
 858         if (o == 0)
 859             m_lasterror = wxSTREAM_EOF;
 860         if (o > bufsize)
 861             o = bufsize;
 862         memcpy((char*)buffer, PyString_AsString(result), o);  // strings only, not unicode...
 863         Py_DECREF(result);
 864
 865     }
 866     else
 867         m_lasterror = wxSTREAM_READ_ERROR;
 868     wxPyEndBlockThreads();
 869     m_lastcount = o;
 870     return o;
 871 }
 872
 873 size_t wxPyCBInputStream::OnSysWrite(const void *buffer, size_t bufsize) {
 874     m_lasterror = wxSTREAM_WRITE_ERROR;
 875     return 0;
 876 }
 877
 878 off_t wxPyCBInputStream::OnSysSeek(off_t off, wxSeekMode mode) {
 879     wxPyBeginBlockThreads();
 880     PyObject* arglist = Py_BuildValue("(ii)", off, mode);
 881     PyObject* result = PyEval_CallObject(m_seek, arglist);
 882     Py_DECREF(arglist);
 883     Py_XDECREF(result);
 884     wxPyEndBlockThreads();
 885     return OnSysTell();
 886 }
 887
 888 off_t wxPyCBInputStream::OnSysTell() const {
 889     wxPyBeginBlockThreads();
 890     PyObject* arglist = Py_BuildValue("()");
 891     PyObject* result = PyEval_CallObject(m_tell, arglist);
 892     Py_DECREF(arglist);
 893     off_t o = 0;
 894     if (result != NULL) {
 895         o = PyInt_AsLong(result);
 896         Py_DECREF(result);
 897     };
 898     wxPyEndBlockThreads();
 899     return o;
 900 }
 901
 902 //----------------------------------------------------------------------
 903
 904 IMPLEMENT_ABSTRACT_CLASS(wxPyCallback, wxObject);
 905
 906 wxPyCallback::wxPyCallback(PyObject* func) {
 907     m_func = func;
 908     Py_INCREF(m_func);
 909 }
 910
 911 wxPyCallback::wxPyCallback(const wxPyCallback& other) {
 912     m_func = other.m_func;
 913     Py_INCREF(m_func);
 914 }
 915
 916 wxPyCallback::~wxPyCallback() {
 917     wxPyBeginBlockThreads();
 918     Py_DECREF(m_func);
 919     wxPyEndBlockThreads();
 920 }
 921
 922
 923
 924 // This function is used for all events destined for Python event handlers.
 925 void wxPyCallback::EventThunker(wxEvent& event) {
 926     wxPyCallback*   cb = (wxPyCallback*)event.m_callbackUserData;
 927     PyObject*       func = cb->m_func;
 928     PyObject*       result;
 929     PyObject*       arg;
 930     PyObject*       tuple;
 931
 932
 933     wxPyBeginBlockThreads();
 934     wxString className = event.GetClassInfo()->GetClassName();
 935
 936     if (className == "wxPyEvent")
 937         arg = ((wxPyEvent*)&event)->GetSelf();
 938     else if (className == "wxPyCommandEvent")
 939         arg = ((wxPyCommandEvent*)&event)->GetSelf();
 940     else {
 941         arg = wxPyConstructObject((void*)&event, className);
 942     }
 943
 944     tuple = PyTuple_New(1);
 945     PyTuple_SET_ITEM(tuple, 0, arg);
 946     result = PyEval_CallObject(func, tuple);
 947     Py_DECREF(tuple);
 948     if (result) {
 949         Py_DECREF(result);
 950         PyErr_Clear();       // Just in case...
 951     } else {
 952         PyErr_Print();
 953     }
 954     wxPyEndBlockThreads();
 955 }
 956
 957
 958 //----------------------------------------------------------------------
 959
 960 wxPyCallbackHelper::wxPyCallbackHelper(const wxPyCallbackHelper& other) {
 961       m_lastFound = NULL;
 962       m_self = other.m_self;
 963       m_class = other.m_class;
 964       if (m_self) {
 965           Py_INCREF(m_self);
 966           Py_INCREF(m_class);
 967       }
 968 }
 969
 970
 971 void wxPyCallbackHelper::setSelf(PyObject* self, PyObject* klass, int incref) {
 972     m_self = self;
 973     m_class = klass;
 974     m_incRef = incref;
 975     if (incref) {
 976         Py_INCREF(m_self);
 977         Py_INCREF(m_class);
 978     }
 979 }
 980
 981
 982 #if PYTHON_API_VERSION >= 1011
 983
 984 // Prior to Python 2.2 PyMethod_GetClass returned the class object
 985 // in which the method was defined.  Starting with 2.2 it returns
 986 // "class that asked for the method" which seems totally bogus to me
 987 // but apprently it fixes some obscure problem waiting to happen in
 988 // Python.  Since the API was not documented Guido and the gang felt
 989 // safe in changing it.  Needless to say that totally screwed up the
 990 // logic below in wxPyCallbackHelper::findCallback, hence this icky
 991 // code to find the class where the method is actually defined...
 992
 993 static
 994 PyObject* PyFindClassWithAttr(PyObject *klass, PyObject *name)
 995 {
 996     int i, n;
 997
 998     if (PyType_Check(klass)) {      // new style classes
 999         // This code is borrowed/adapted from _PyType_Lookup in typeobject.c
1000         // (TODO: This part is not tested yet, so I'm not sure it is correct...)
1001         PyTypeObject* type = (PyTypeObject*)klass;
1002         PyObject *mro, *res, *base, *dict;
1003         /* Look in tp_dict of types in MRO */
1004         mro = type->tp_mro;
1005         assert(PyTuple_Check(mro));
1006         n = PyTuple_GET_SIZE(mro);
1007         for (i = 0; i < n; i++) {
1008             base = PyTuple_GET_ITEM(mro, i);
1009             if (PyClass_Check(base))
1010                 dict = ((PyClassObject *)base)->cl_dict;
1011             else {
1012                 assert(PyType_Check(base));
1013                 dict = ((PyTypeObject *)base)->tp_dict;
1014             }
1015             assert(dict && PyDict_Check(dict));
1016             res = PyDict_GetItem(dict, name);
1017             if (res != NULL)
1018                 return base;
1019         }
1020         return NULL;
1021     }
1022
1023     else if (PyClass_Check(klass)) { // old style classes
1024         // This code is borrowed/adapted from class_lookup in classobject.c
1025         PyClassObject* cp = (PyClassObject*)klass;
1026         PyObject *value = PyDict_GetItem(cp->cl_dict, name);
1027         if (value != NULL) {
1028             return (PyObject*)cp;
1029         }
1030         n = PyTuple_Size(cp->cl_bases);
1031         for (i = 0; i < n; i++) {
1032             PyObject* base = PyTuple_GetItem(cp->cl_bases, i);
1033             PyObject *v = PyFindClassWithAttr(base, name);
1034             if (v != NULL)
1035                 return v;
1036         }
1037         return NULL;
1038     }
1039     return NULL;
1040 }
1041 #endif
1042
1043
1044 static
1045 PyObject* PyMethod_GetDefiningClass(PyObject* method, const char* name)
1046 {
1047     PyObject* mgc = PyMethod_GET_CLASS(method);
1048
1049 #if PYTHON_API_VERSION <= 1010    // prior to Python 2.2, the easy way
1050     return mgc;
1051 #else                             // 2.2 and after, the hard way...
1052
1053     PyObject* nameo = PyString_FromString(name);
1054     PyObject* klass = PyFindClassWithAttr(mgc, nameo);
1055     Py_DECREF(nameo);
1056     return klass;
1057 #endif
1058 }
1059
1060
1061
1062 bool wxPyCallbackHelper::findCallback(const char* name) const {
1063     wxPyCallbackHelper* self = (wxPyCallbackHelper*)this; // cast away const
1064     self->m_lastFound = NULL;
1065
1066     // If the object (m_self) has an attibute of the given name...
1067     if (m_self && PyObject_HasAttrString(m_self, (char*)name)) {
1068         PyObject *method, *klass;
1069         method = PyObject_GetAttrString(m_self, (char*)name);
1070
1071         // ...and if that attribute is a method, and if that method's class is
1072         // not from a base class...
1073         if (PyMethod_Check(method) &&
1074             (klass = PyMethod_GetDefiningClass(method, (char*)name)) != NULL &&
1075             ((klass == m_class) || PyClass_IsSubclass(klass, m_class))) {
1076
1077             // ...then we'll save a pointer to the method so callCallback can call it.
1078             self->m_lastFound = method;
1079         }
1080         else {
1081             Py_DECREF(method);
1082         }
1083     }
1084     return m_lastFound != NULL;
1085 }
1086
1087
1088 int wxPyCallbackHelper::callCallback(PyObject* argTuple) const {
1089     PyObject*   result;
1090     int         retval = FALSE;
1091
1092     result = callCallbackObj(argTuple);
1093     if (result) {                       // Assumes an integer return type...
1094         retval = PyInt_AsLong(result);
1095         Py_DECREF(result);
1096         PyErr_Clear();                  // forget about it if it's not...
1097     }
1098     return retval;
1099 }
1100
1101 // Invoke the Python callable object, returning the raw PyObject return
1102 // value.  Caller should DECREF the return value and also call PyEval_SaveThread.
1103 PyObject* wxPyCallbackHelper::callCallbackObj(PyObject* argTuple) const {
1104     PyObject* result;
1105
1106     // Save a copy of the pointer in case the callback generates another
1107     // callback.  In that case m_lastFound will have a different value when
1108     // it gets back here...
1109     PyObject* method = m_lastFound;
1110
1111     result = PyEval_CallObject(method, argTuple);
1112     Py_DECREF(argTuple);
1113     Py_DECREF(method);
1114     if (!result) {
1115         PyErr_Print();
1116     }
1117     return result;
1118 }
1119
1120
1121 void wxPyCBH_setCallbackInfo(wxPyCallbackHelper& cbh, PyObject* self, PyObject* klass, int incref) {
1122     cbh.setSelf(self, klass, incref);
1123 }
1124
1125 bool wxPyCBH_findCallback(const wxPyCallbackHelper& cbh, const char* name) {
1126     return cbh.findCallback(name);
1127 }
1128
1129 int  wxPyCBH_callCallback(const wxPyCallbackHelper& cbh, PyObject* argTuple) {
1130     return cbh.callCallback(argTuple);
1131 }
1132
1133 PyObject* wxPyCBH_callCallbackObj(const wxPyCallbackHelper& cbh, PyObject* argTuple) {
1134     return cbh.callCallbackObj(argTuple);
1135 }
1136
1137
1138 void wxPyCBH_delete(wxPyCallbackHelper* cbh) {
1139     if (cbh->m_incRef) {
1140         wxPyBeginBlockThreads();
1141         Py_XDECREF(cbh->m_self);
1142         Py_XDECREF(cbh->m_class);
1143         wxPyEndBlockThreads();
1144     }
1145 }
1146
1147 //---------------------------------------------------------------------------
1148 //---------------------------------------------------------------------------
1149 // These event classes can be derived from in Python and passed through the event
1150 // system without losing anything.  They do this by keeping a reference to
1151 // themselves and some special case handling in wxPyCallback::EventThunker.
1152
1153
1154 wxPyEvtSelfRef::wxPyEvtSelfRef() {
1155     //m_self = Py_None;         // **** We don't do normal ref counting to prevent
1156     //Py_INCREF(m_self);        //      circular loops...
1157     m_cloned = FALSE;
1158 }
1159
1160 wxPyEvtSelfRef::~wxPyEvtSelfRef() {
1161     wxPyBeginBlockThreads();
1162     if (m_cloned)
1163         Py_DECREF(m_self);
1164     wxPyEndBlockThreads();
1165 }
1166
1167 void wxPyEvtSelfRef::SetSelf(PyObject* self, bool clone) {
1168     wxPyBeginBlockThreads();
1169     if (m_cloned)
1170         Py_DECREF(m_self);
1171     m_self = self;
1172     if (clone) {
1173         Py_INCREF(m_self);
1174         m_cloned = TRUE;
1175     }
1176     wxPyEndBlockThreads();
1177 }
1178
1179 PyObject* wxPyEvtSelfRef::GetSelf() const {
1180     Py_INCREF(m_self);
1181     return m_self;
1182 }
1183
1184
1185 IMPLEMENT_ABSTRACT_CLASS(wxPyEvent, wxEvent);
1186 IMPLEMENT_ABSTRACT_CLASS(wxPyCommandEvent, wxCommandEvent);
1187
1188
1189 wxPyEvent::wxPyEvent(int id)
1190     : wxEvent(id) {
1191 }
1192
1193
1194 wxPyEvent::wxPyEvent(const wxPyEvent& evt)
1195     : wxEvent(evt)
1196 {
1197     SetSelf(evt.m_self, TRUE);
1198 }
1199
1200
1201 wxPyEvent::~wxPyEvent() {
1202 }
1203
1204
1205 wxPyCommandEvent::wxPyCommandEvent(wxEventType commandType, int id)
1206     : wxCommandEvent(commandType, id) {
1207 }
1208
1209
1210 wxPyCommandEvent::wxPyCommandEvent(const wxPyCommandEvent& evt)
1211     : wxCommandEvent(evt)
1212 {
1213     SetSelf(evt.m_self, TRUE);
1214 }
1215
1216
1217 wxPyCommandEvent::~wxPyCommandEvent() {
1218 }
1219
1220
1221
1222
1223 //---------------------------------------------------------------------------
1224 //---------------------------------------------------------------------------
1225
1226
1227 wxPyTimer::wxPyTimer(PyObject* callback) {
1228     func = callback;
1229     Py_INCREF(func);
1230 }
1231
1232 wxPyTimer::~wxPyTimer() {
1233     wxPyBeginBlockThreads();
1234     Py_DECREF(func);
1235     wxPyEndBlockThreads();
1236 }
1237
1238 void wxPyTimer::Notify() {
1239     if (!func || func == Py_None) {
1240         wxTimer::Notify();
1241     }
1242     else {
1243         wxPyBeginBlockThreads();
1244
1245         PyObject*   result;
1246         PyObject*   args = Py_BuildValue("()");
1247
1248         result = PyEval_CallObject(func, args);
1249         Py_DECREF(args);
1250         if (result) {
1251             Py_DECREF(result);
1252             PyErr_Clear();
1253         } else {
1254             PyErr_Print();
1255         }
1256
1257         wxPyEndBlockThreads();
1258     }
1259 }
1260
1261
1262
1263 //---------------------------------------------------------------------------
1264 //---------------------------------------------------------------------------
1265 // Convert a wxList to a Python List
1266
1267 PyObject* wxPy_ConvertList(wxListBase* list, const char* className) {
1268     PyObject*   pyList;
1269     PyObject*   pyObj;
1270     wxObject*   wxObj;
1271     wxNode*     node = list->First();
1272
1273     wxPyBeginBlockThreads();
1274     pyList = PyList_New(0);
1275     while (node) {
1276         wxObj = node->Data();
1277         pyObj = wxPyMake_wxObject(wxObj); //wxPyConstructObject(wxObj, className);
1278         PyList_Append(pyList, pyObj);
1279         node = node->Next();
1280     }
1281     wxPyEndBlockThreads();
1282     return pyList;
1283 }
1284
1285 //----------------------------------------------------------------------
1286
1287 long wxPyGetWinHandle(wxWindow* win) {
1288 #ifdef __WXMSW__
1289     return (long)win->GetHandle();
1290 #endif
1291
1292     // Find and return the actual X-Window.
1293 #ifdef __WXGTK__
1294     if (win->m_wxwindow) {
1295         GdkWindowPrivate* bwin = (GdkWindowPrivate*)GTK_PIZZA(win->m_wxwindow)->bin_window;
1296         if (bwin) {
1297             return (long)bwin->xwindow;
1298         }
1299     }
1300 #endif
1301     return 0;
1302 }
1303
1304 //----------------------------------------------------------------------
1305 // Some helper functions for typemaps in my_typemaps.i, so they won't be
1306 // included in every file over and over again...
1307
1308 #if PYTHON_API_VERSION >= 1009
1309     static char* wxStringErrorMsg = "String or Unicode type required";
1310 #else
1311     static char* wxStringErrorMsg = "String type required";
1312 #endif
1313
1314
1315 wxString* wxString_in_helper(PyObject* source) {
1316     wxString* target;
1317 #if PYTHON_API_VERSION >= 1009  // Have Python unicode API
1318     if (!PyString_Check(source) && !PyUnicode_Check(source)) {
1319         PyErr_SetString(PyExc_TypeError, wxStringErrorMsg);
1320         return NULL;
1321     }
1322 #if wxUSE_UNICODE
1323     if (PyUnicode_Check(source)) {
1324         target = new wxString(PyUnicode_AS_UNICODE(source));
1325     } else {
1326         // It is a string, get pointers to it and transform to unicode
1327         char* tmpPtr; int tmpSize;
1328         PyString_AsStringAndSize(source, &tmpPtr, &tmpSize);
1329         target = new wxString(tmpPtr, *wxConvCurrent, tmpSize);
1330     }
1331 #else
1332     char* tmpPtr; int tmpSize;
1333     if (PyString_AsStringAndSize(source, &tmpPtr, &tmpSize) == -1) {
1334         PyErr_SetString(PyExc_TypeError, "Unable to convert string");
1335         return NULL;
1336     }
1337     target = new wxString(tmpPtr, tmpSize);
1338 #endif // wxUSE_UNICODE
1339
1340 #else  // No Python unicode API (1.5.2)
1341     if (!PyString_Check(source)) {
1342         PyErr_SetString(PyExc_TypeError, wxStringErrorMsg);
1343         return NULL;
1344     }
1345     target = new wxString(PyString_AS_STRING(source), PyString_GET_SIZE(source));
1346 #endif
1347     return target;
1348 }
1349
1350
1351 // Similar to above except doesn't use "new" and doesn't set an exception
1352 wxString Py2wxString(PyObject* source)
1353 {
1354     wxString target;
1355     bool     doDecRef = FALSE;
1356
1357 #if PYTHON_API_VERSION >= 1009  // Have Python unicode API
1358     if (!PyString_Check(source) && !PyUnicode_Check(source)) {
1359         // Convert to String if not one already...  (TODO: Unicode too?)
1360         source = PyObject_Str(source);
1361         doDecRef = TRUE;
1362     }
1363
1364 #if wxUSE_UNICODE
1365     if (PyUnicode_Check(source)) {
1366         target = PyUnicode_AS_UNICODE(source);
1367     } else {
1368         // It is a string, get pointers to it and transform to unicode
1369         char* tmpPtr; int tmpSize;
1370         PyString_AsStringAndSize(source, &tmpPtr, &tmpSize);
1371         target = wxString(tmpPtr, *wxConvCurrent, tmpSize);
1372     }
1373 #else
1374     char* tmpPtr; int tmpSize;
1375     PyString_AsStringAndSize(source, &tmpPtr, &tmpSize);
1376     target = wxString(tmpPtr, tmpSize);
1377 #endif // wxUSE_UNICODE
1378
1379 #else  // No Python unicode API (1.5.2)
1380     if (!PyString_Check(source)) {
1381         // Convert to String if not one already...
1382         source = PyObject_Str(source);
1383         doDecRef = TRUE;
1384     }
1385     target = wxString(PyString_AS_STRING(source), PyString_GET_SIZE(source));
1386 #endif
1387
1388     if (doDecRef)
1389         Py_DECREF(source);
1390     return target;
1391 }
1392
1393
1394 // Make either a Python String or Unicode object, depending on build mode
1395 PyObject* wx2PyString(const wxString& src)
1396 {
1397     PyObject* str;
1398 #if wxUSE_UNICODE
1399     str = PyUnicode_FromUnicode(src.c_str(), src.Len());
1400 #else
1401     str = PyString_FromStringAndSize(src.c_str(), src.Len());
1402 #endif
1403     return str;
1404 }
1405
1406
1407 //----------------------------------------------------------------------
1408
1409
1410 byte* byte_LIST_helper(PyObject* source) {
1411     if (!PyList_Check(source)) {
1412         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1413         return NULL;
1414     }
1415     int count = PyList_Size(source);
1416     byte* temp = new byte[count];
1417     if (! temp) {
1418         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1419         return NULL;
1420     }
1421     for (int x=0; x<count; x++) {
1422         PyObject* o = PyList_GetItem(source, x);
1423         if (! PyInt_Check(o)) {
1424             PyErr_SetString(PyExc_TypeError, "Expected a list of integers.");
1425             return NULL;
1426         }
1427         temp[x] = (byte)PyInt_AsLong(o);
1428     }
1429     return temp;
1430 }
1431
1432
1433 int* int_LIST_helper(PyObject* source) {
1434     if (!PyList_Check(source)) {
1435         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1436         return NULL;
1437     }
1438     int count = PyList_Size(source);
1439     int* temp = new int[count];
1440     if (! temp) {
1441         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1442         return NULL;
1443     }
1444     for (int x=0; x<count; x++) {
1445         PyObject* o = PyList_GetItem(source, x);
1446         if (! PyInt_Check(o)) {
1447             PyErr_SetString(PyExc_TypeError, "Expected a list of integers.");
1448             return NULL;
1449         }
1450         temp[x] = PyInt_AsLong(o);
1451     }
1452     return temp;
1453 }
1454
1455
1456 long* long_LIST_helper(PyObject* source) {
1457     if (!PyList_Check(source)) {
1458         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1459         return NULL;
1460     }
1461     int count = PyList_Size(source);
1462     long* temp = new long[count];
1463     if (! temp) {
1464         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1465         return NULL;
1466     }
1467     for (int x=0; x<count; x++) {
1468         PyObject* o = PyList_GetItem(source, x);
1469         if (! PyInt_Check(o)) {
1470             PyErr_SetString(PyExc_TypeError, "Expected a list of integers.");
1471             return NULL;
1472         }
1473         temp[x] = PyInt_AsLong(o);
1474     }
1475     return temp;
1476 }
1477
1478
1479 char** string_LIST_helper(PyObject* source) {
1480     if (!PyList_Check(source)) {
1481         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1482         return NULL;
1483     }
1484     int count = PyList_Size(source);
1485     char** temp = new char*[count];
1486     if (! temp) {
1487         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1488         return NULL;
1489     }
1490     for (int x=0; x<count; x++) {
1491         PyObject* o = PyList_GetItem(source, x);
1492         if (! PyString_Check(o)) {
1493             PyErr_SetString(PyExc_TypeError, "Expected a list of strings.");
1494             return NULL;
1495         }
1496         temp[x] = PyString_AsString(o);
1497     }
1498     return temp;
1499 }
1500
1501 //--------------------------------
1502 // Part of patch from Tim Hochberg
1503 static inline bool wxPointFromObjects(PyObject* o1, PyObject* o2, wxPoint* point) {
1504     if (PyInt_Check(o1) && PyInt_Check(o2)) {
1505         point->x = PyInt_AS_LONG(o1);
1506         point->y = PyInt_AS_LONG(o2);
1507         return true;
1508     }
1509     if (PyFloat_Check(o1) && PyFloat_Check(o2)) {
1510         point->x = (int)PyFloat_AS_DOUBLE(o1);
1511         point->y = (int)PyFloat_AS_DOUBLE(o2);
1512         return true;
1513     }
1514     if (PyInstance_Check(o1) || PyInstance_Check(o2)) {
1515         // Disallow instances because they can cause havok
1516         return false;
1517     }
1518     if (PyNumber_Check(o1) && PyNumber_Check(o2)) {
1519         // I believe this excludes instances, so this should be safe without INCREFFing o1 and o2
1520         point->x = PyInt_AsLong(o1);
1521         point->y = PyInt_AsLong(o2);
1522         return true;
1523     }
1524     return false;
1525 }
1526
1527
1528 wxPoint* wxPoint_LIST_helper(PyObject* source, int *count) {
1529     // Putting all of the declarations here allows
1530     // us to put the error handling all in one place.
1531     int x;
1532     wxPoint* temp;
1533     PyObject *o, *o1, *o2;
1534     bool isFast = PyList_Check(source) || PyTuple_Check(source);
1535
1536     if (!PySequence_Check(source)) {
1537         goto error0;
1538     }
1539
1540     // The length of the sequence is returned in count.
1541     *count = PySequence_Length(source);
1542     if (*count < 0) {
1543         goto error0;
1544     }
1545
1546     temp = new wxPoint[*count];
1547     if (!temp) {
1548         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1549         return NULL;
1550     }
1551     for (x=0; x<*count; x++) {
1552         // Get an item: try fast way first.
1553         if (isFast) {
1554             o = PySequence_Fast_GET_ITEM(source, x);
1555         }
1556         else {
1557             o = PySequence_GetItem(source, x);
1558             if (o == NULL) {
1559                 goto error1;
1560             }
1561         }
1562
1563         // Convert o to wxPoint.
1564         if ((PyTuple_Check(o) && PyTuple_GET_SIZE(o) == 2) ||
1565             (PyList_Check(o) && PyList_GET_SIZE(o) == 2)) {
1566             o1 = PySequence_Fast_GET_ITEM(o, 0);
1567             o2 = PySequence_Fast_GET_ITEM(o, 1);
1568             if (!wxPointFromObjects(o1, o2, &temp[x])) {
1569                 goto error2;
1570             }
1571         }
1572         else if (PyInstance_Check(o)) {
1573             wxPoint* pt;
1574             if (SWIG_GetPtrObj(o, (void **)&pt, "_wxPoint_p")) {
1575                 goto error2;
1576             }
1577             temp[x] = *pt;
1578         }
1579         else if (PySequence_Check(o) && PySequence_Length(o) == 2) {
1580             o1 = PySequence_GetItem(o, 0);
1581             o2 = PySequence_GetItem(o, 1);
1582             if (!wxPointFromObjects(o1, o2, &temp[x])) {
1583                 goto error3;
1584             }
1585             Py_DECREF(o1);
1586             Py_DECREF(o2);
1587         }
1588         else {
1589             goto error2;
1590         }
1591         // Clean up.
1592         if (!isFast)
1593             Py_DECREF(o);
1594     }
1595     return temp;
1596
1597 error3:
1598     Py_DECREF(o1);
1599     Py_DECREF(o2);
1600 error2:
1601     if (!isFast)
1602         Py_DECREF(o);
1603 error1:
1604     delete temp;
1605 error0:
1606     PyErr_SetString(PyExc_TypeError, "Expected a sequence of length-2 sequences or wxPoints.");
1607     return NULL;
1608 }
1609 // end of patch
1610 //------------------------------
1611
1612
1613 wxBitmap** wxBitmap_LIST_helper(PyObject* source) {
1614     if (!PyList_Check(source)) {
1615         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1616         return NULL;
1617     }
1618     int count = PyList_Size(source);
1619     wxBitmap** temp = new wxBitmap*[count];
1620     if (! temp) {
1621         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1622         return NULL;
1623     }
1624     for (int x=0; x<count; x++) {
1625         PyObject* o = PyList_GetItem(source, x);
1626         if (PyInstance_Check(o)) {
1627             wxBitmap*    pt;
1628             if (SWIG_GetPtrObj(o, (void **) &pt,"_wxBitmap_p")) {
1629                 PyErr_SetString(PyExc_TypeError,"Expected _wxBitmap_p.");
1630                 return NULL;
1631             }
1632             temp[x] = pt;
1633         }
1634         else {
1635             PyErr_SetString(PyExc_TypeError, "Expected a list of wxBitmaps.");
1636             return NULL;
1637         }
1638     }
1639     return temp;
1640 }
1641
1642
1643
1644 wxString* wxString_LIST_helper(PyObject* source) {
1645     if (!PyList_Check(source)) {
1646         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1647         return NULL;
1648     }
1649     int count = PyList_Size(source);
1650     wxString* temp = new wxString[count];
1651     if (! temp) {
1652         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1653         return NULL;
1654     }
1655     for (int x=0; x<count; x++) {
1656         PyObject* o = PyList_GetItem(source, x);
1657 #if PYTHON_API_VERSION >= 1009
1658         if (! PyString_Check(o) && ! PyUnicode_Check(o)) {
1659             PyErr_SetString(PyExc_TypeError, "Expected a list of string or unicode objects.");
1660             return NULL;
1661         }
1662 #else
1663         if (! PyString_Check(o)) {
1664             PyErr_SetString(PyExc_TypeError, "Expected a list of strings.");
1665             return NULL;
1666         }
1667 #endif
1668
1669         wxString* pStr = wxString_in_helper(o);
1670         temp[x] = *pStr;
1671         delete pStr;
1672     }
1673     return temp;
1674 }
1675
1676
1677 wxAcceleratorEntry* wxAcceleratorEntry_LIST_helper(PyObject* source) {
1678     if (!PyList_Check(source)) {
1679         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1680         return NULL;
1681     }
1682     int count                = PyList_Size(source);
1683     wxAcceleratorEntry* temp = new wxAcceleratorEntry[count];
1684     if (! temp) {
1685         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1686         return NULL;
1687     }
1688     for (int x=0; x<count; x++) {
1689         PyObject* o = PyList_GetItem(source, x);
1690         if (PyInstance_Check(o)) {
1691             wxAcceleratorEntry* ae;
1692             if (SWIG_GetPtrObj(o, (void **) &ae,"_wxAcceleratorEntry_p")) {
1693                 PyErr_SetString(PyExc_TypeError,"Expected _wxAcceleratorEntry_p.");
1694                 return NULL;
1695             }
1696             temp[x] = *ae;
1697         }
1698         else if (PyTuple_Check(o)) {
1699             PyObject* o1 = PyTuple_GetItem(o, 0);
1700             PyObject* o2 = PyTuple_GetItem(o, 1);
1701             PyObject* o3 = PyTuple_GetItem(o, 2);
1702             temp[x].Set(PyInt_AsLong(o1), PyInt_AsLong(o2), PyInt_AsLong(o3));
1703         }
1704         else {
1705             PyErr_SetString(PyExc_TypeError, "Expected a list of 3-tuples or wxAcceleratorEntry objects.");
1706             return NULL;
1707         }
1708     }
1709     return temp;
1710 }
1711
1712
1713 wxPen** wxPen_LIST_helper(PyObject* source) {
1714     if (!PyList_Check(source)) {
1715         PyErr_SetString(PyExc_TypeError, "Expected a list object.");
1716         return NULL;
1717     }
1718     int count = PyList_Size(source);
1719     wxPen** temp = new wxPen*[count];
1720     if (!temp) {
1721         PyErr_SetString(PyExc_MemoryError, "Unable to allocate temporary array");
1722         return NULL;
1723     }
1724     for (int x=0; x<count; x++) {
1725         PyObject* o = PyList_GetItem(source, x);
1726         if (PyInstance_Check(o)) {
1727             wxPen*  pt;
1728             if (SWIG_GetPtrObj(o, (void **) &pt,"_wxPen_p")) {
1729                 delete temp;
1730                 PyErr_SetString(PyExc_TypeError,"Expected _wxPen_p.");
1731                 return NULL;
1732             }
1733             temp[x] = pt;
1734         }
1735         else {
1736             delete temp;
1737             PyErr_SetString(PyExc_TypeError, "Expected a list of wxPens.");
1738             return NULL;
1739         }
1740     }
1741     return temp;
1742 }
1743
1744
1745 bool _2int_seq_helper(PyObject* source, int* i1, int* i2) {
1746     bool isFast = PyList_Check(source) || PyTuple_Check(source);
1747     PyObject *o1, *o2;
1748
1749     if (!PySequence_Check(source) || PySequence_Length(source) != 2)
1750         return FALSE;
1751
1752     if (isFast) {
1753         o1 = PySequence_Fast_GET_ITEM(source, 0);
1754         o2 = PySequence_Fast_GET_ITEM(source, 1);
1755     }
1756     else {
1757         o1 = PySequence_GetItem(source, 0);
1758         o2 = PySequence_GetItem(source, 1);
1759     }
1760
1761     *i1 = PyInt_AsLong(o1);
1762     *i2 = PyInt_AsLong(o2);
1763
1764     if (! isFast) {
1765         Py_DECREF(o1);
1766         Py_DECREF(o2);
1767     }
1768     return TRUE;
1769 }
1770
1771
1772 bool _4int_seq_helper(PyObject* source, int* i1, int* i2, int* i3, int* i4) {
1773     bool isFast = PyList_Check(source) || PyTuple_Check(source);
1774     PyObject *o1, *o2, *o3, *o4;
1775
1776     if (!PySequence_Check(source) || PySequence_Length(source) != 4)
1777         return FALSE;
1778
1779     if (isFast) {
1780         o1 = PySequence_Fast_GET_ITEM(source, 0);
1781         o2 = PySequence_Fast_GET_ITEM(source, 1);
1782         o3 = PySequence_Fast_GET_ITEM(source, 2);
1783         o4 = PySequence_Fast_GET_ITEM(source, 3);
1784     }
1785     else {
1786         o1 = PySequence_GetItem(source, 0);
1787         o2 = PySequence_GetItem(source, 1);
1788         o3 = PySequence_GetItem(source, 2);
1789         o4 = PySequence_GetItem(source, 3);
1790     }
1791
1792     *i1 = PyInt_AsLong(o1);
1793     *i2 = PyInt_AsLong(o2);
1794     *i3 = PyInt_AsLong(o3);
1795     *i4 = PyInt_AsLong(o4);
1796
1797     if (! isFast) {
1798         Py_DECREF(o1);
1799         Py_DECREF(o2);
1800         Py_DECREF(o3);
1801         Py_DECREF(o4);
1802     }
1803     return TRUE;
1804 }
1805
1806
1807 //----------------------------------------------------------------------
1808
1809 bool wxSize_helper(PyObject* source, wxSize** obj) {
1810
1811     // If source is an object instance then it may already be the right type
1812     if (PyInstance_Check(source)) {
1813         wxSize* ptr;
1814         if (SWIG_GetPtrObj(source, (void **)&ptr, "_wxSize_p"))
1815             goto error;
1816         *obj = ptr;
1817         return TRUE;
1818     }
1819     // otherwise a 2-tuple of integers is expected
1820     else if (PySequence_Check(source) && PyObject_Length(source) == 2) {
1821         PyObject* o1 = PySequence_GetItem(source, 0);
1822         PyObject* o2 = PySequence_GetItem(source, 1);
1823         if (!PyNumber_Check(o1) || !PyNumber_Check(o2)) {
1824             Py_DECREF(o1);
1825             Py_DECREF(o2);
1826             goto error;
1827         }
1828         **obj = wxSize(PyInt_AsLong(o1), PyInt_AsLong(o2));
1829         Py_DECREF(o1);
1830         Py_DECREF(o2);
1831         return TRUE;
1832     }
1833
1834  error:
1835     PyErr_SetString(PyExc_TypeError, "Expected a 2-tuple of integers or a wxSize object.");
1836     return FALSE;
1837 }
1838
1839 bool wxPoint_helper(PyObject* source, wxPoint** obj) {
1840
1841     // If source is an object instance then it may already be the right type
1842     if (PyInstance_Check(source)) {
1843         wxPoint* ptr;
1844         if (SWIG_GetPtrObj(source, (void **)&ptr, "_wxPoint_p"))
1845             goto error;
1846         *obj = ptr;
1847         return TRUE;
1848     }
1849     // otherwise a length-2 sequence of integers is expected
1850     if (PySequence_Check(source) && PySequence_Length(source) == 2) {
1851         PyObject* o1 = PySequence_GetItem(source, 0);
1852         PyObject* o2 = PySequence_GetItem(source, 1);
1853         // This should really check for integers, not numbers -- but that would break code.
1854         if (!PyNumber_Check(o1) || !PyNumber_Check(o2)) {
1855             Py_DECREF(o1);
1856             Py_DECREF(o2);
1857             goto error;
1858         }
1859         **obj = wxPoint(PyInt_AsLong(o1), PyInt_AsLong(o2));
1860         Py_DECREF(o1);
1861         Py_DECREF(o2);
1862         return TRUE;
1863     }
1864  error:
1865     PyErr_SetString(PyExc_TypeError, "Expected a 2-tuple of integers or a wxPoint object.");
1866     return FALSE;
1867 }
1868
1869
1870
1871 bool wxRealPoint_helper(PyObject* source, wxRealPoint** obj) {
1872
1873     // If source is an object instance then it may already be the right type
1874     if (PyInstance_Check(source)) {
1875         wxRealPoint* ptr;
1876         if (SWIG_GetPtrObj(source, (void **)&ptr, "_wxRealPoint_p"))
1877             goto error;
1878         *obj = ptr;
1879         return TRUE;
1880     }
1881     // otherwise a 2-tuple of floats is expected
1882     else if (PySequence_Check(source) && PyObject_Length(source) == 2) {
1883         PyObject* o1 = PySequence_GetItem(source, 0);
1884         PyObject* o2 = PySequence_GetItem(source, 1);
1885         if (!PyNumber_Check(o1) || !PyNumber_Check(o2)) {
1886             Py_DECREF(o1);
1887             Py_DECREF(o2);
1888             goto error;
1889         }
1890         **obj = wxRealPoint(PyFloat_AsDouble(o1), PyFloat_AsDouble(o2));
1891         Py_DECREF(o1);
1892         Py_DECREF(o2);
1893         return TRUE;
1894     }
1895
1896  error:
1897     PyErr_SetString(PyExc_TypeError, "Expected a 2-tuple of floats or a wxRealPoint object.");
1898     return FALSE;
1899 }
1900
1901
1902
1903
1904 bool wxRect_helper(PyObject* source, wxRect** obj) {
1905
1906     // If source is an object instance then it may already be the right type
1907     if (PyInstance_Check(source)) {
1908         wxRect* ptr;
1909         if (SWIG_GetPtrObj(source, (void **)&ptr, "_wxRect_p"))
1910             goto error;
1911         *obj = ptr;
1912         return TRUE;
1913     }
1914     // otherwise a 4-tuple of integers is expected
1915     else if (PySequence_Check(source) && PyObject_Length(source) == 4) {
1916         PyObject* o1 = PySequence_GetItem(source, 0);
1917         PyObject* o2 = PySequence_GetItem(source, 1);
1918         PyObject* o3 = PySequence_GetItem(source, 2);
1919         PyObject* o4 = PySequence_GetItem(source, 3);
1920         if (!PyNumber_Check(o1) || !PyNumber_Check(o2) ||
1921             !PyNumber_Check(o3) || !PyNumber_Check(o4)) {
1922             Py_DECREF(o1);
1923             Py_DECREF(o2);
1924             Py_DECREF(o3);
1925             Py_DECREF(o4);
1926             goto error;
1927         }
1928         **obj = wxRect(PyInt_AsLong(o1), PyInt_AsLong(o2),
1929                        PyInt_AsLong(o3), PyInt_AsLong(o4));
1930         Py_DECREF(o1);
1931         Py_DECREF(o2);
1932         Py_DECREF(o3);
1933         Py_DECREF(o4);
1934         return TRUE;
1935     }
1936
1937  error:
1938     PyErr_SetString(PyExc_TypeError, "Expected a 4-tuple of integers or a wxRect object.");
1939     return FALSE;
1940 }
1941
1942
1943
1944 bool wxColour_helper(PyObject* source, wxColour** obj) {
1945
1946     // If source is an object instance then it may already be the right type
1947     if (PyInstance_Check(source)) {
1948         wxColour* ptr;
1949         if (SWIG_GetPtrObj(source, (void **)&ptr, "_wxColour_p"))
1950             goto error;
1951         *obj = ptr;
1952         return TRUE;
1953     }
1954     // otherwise a string is expected
1955     else if (PyString_Check(source)) {
1956         wxString spec(PyString_AS_STRING(source), *wxConvCurrent);
1957         if (spec.GetChar(0) == '#' && spec.Length() == 7) {  // It's  #RRGGBB
1958             long red, green, blue;
1959             red = green = blue = 0;
1960             spec.Mid(1,2).ToLong(&red,   16);
1961             spec.Mid(3,2).ToLong(&green, 16);
1962             spec.Mid(5,2).ToLong(&blue,  16);
1963
1964             **obj = wxColour(red, green, blue);
1965             return TRUE;
1966         }
1967         else {                                       // it's a colour name
1968             **obj = wxColour(spec);
1969             return TRUE;
1970         }
1971     }
1972
1973  error:
1974     PyErr_SetString(PyExc_TypeError,
1975                     "Expected a wxColour object or a string containing a colour "
1976                     "name or '#RRGGBB'.");
1977     return FALSE;
1978 }
1979
1980
1981 //----------------------------------------------------------------------
1982
1983 PyObject* wxArrayString2PyList_helper(const wxArrayString& arr) {
1984
1985     PyObject* list = PyList_New(0);
1986     for (size_t i=0; i < arr.GetCount(); i++) {
1987 #if wxUSE_UNICODE
1988         PyObject* str = PyUnicode_FromUnicode(arr[i].c_str(), arr[i].Len());
1989 #else
1990         PyObject* str = PyString_FromStringAndSize(arr[i].c_str(), arr[i].Len());
1991 #endif
1992         PyList_Append(list, str);
1993         Py_DECREF(str);
1994     }
1995     return list;
1996 }
1997
1998
1999 PyObject* wxArrayInt2PyList_helper(const wxArrayInt& arr) {
2000
2001     PyObject* list = PyList_New(0);
2002     for (size_t i=0; i < arr.GetCount(); i++) {
2003         PyObject* number = PyInt_FromLong(arr[i]);
2004         PyList_Append(list, number);
2005         Py_DECREF(number);
2006     }
2007     return list;
2008 }
2009
2010
2011 //----------------------------------------------------------------------
2012 //----------------------------------------------------------------------
2013
2014
2015
2016