]> git.saurik.com Git - wxWidgets.git/blobdiff - wxPython/src/helpers.cpp
Add AddStretchSpacer and friends
[wxWidgets.git] / wxPython / src / helpers.cpp
index a299f1ea22fdaefcc26b5f6fc025a5d213a8391d..e7326368cee096856ab8e8d754960ce2185c9231 100644 (file)
@@ -15,6 +15,8 @@
 #include <Python.h>
 #include "wx/wxPython/wxPython_int.h"
 #include "wx/wxPython/pyistream.h"
+#include "wx/wxPython/swigver.h"
+#include "wx/wxPython/twoitem.h"
 
 #ifdef __WXMSW__
 #include <wx/msw/private.h>
@@ -29,8 +31,8 @@
 #include <gdk/gdkprivate.h>
 #include <wx/gtk/win_gtk.h>
 #define GetXWindow(wxwin) (wxwin)->m_wxwindow ? \
-                              GDK_WINDOW_XWINDOW(GTK_PIZZA((wxwin)->m_wxwindow)->bin_window) : \
-                              GDK_WINDOW_XWINDOW((wxwin)->m_widget->window)
+                          GDK_WINDOW_XWINDOW(GTK_PIZZA((wxwin)->m_wxwindow)->bin_window) : \
+                          GDK_WINDOW_XWINDOW((wxwin)->m_widget->window)
 #include <locale.h>
 #endif
 
@@ -61,6 +63,7 @@ bool wxPyDoingCleanup = false;
 
 
 #ifdef WXP_WITH_THREAD
+#if !wxPyUSE_GIL_STATE
 struct wxPyThreadState {
     unsigned long  tid;
     PyThreadState* tstate;
@@ -76,8 +79,11 @@ WX_DEFINE_OBJARRAY(wxPyThreadStateArray);
 
 wxPyThreadStateArray* wxPyTStates = NULL;
 wxMutex*              wxPyTMutex = NULL;
+
+#endif
 #endif
 
+
 #define DEFAULTENCODING_SIZE 64
 static char wxPyDefaultEncoding[DEFAULTENCODING_SIZE] = "ascii";
 
@@ -93,14 +99,15 @@ PyObject* wxPyPtrTypeMap = NULL;
 // This gets run when the DLL is loaded.  We just need to save a handle.
 //----------------------------------------------------------------------
 
+extern "C"
 BOOL WINAPI DllMain(
     HINSTANCE   hinstDLL,    // handle to DLL module
     DWORD       fdwReason,   // reason for calling function
     LPVOID      lpvReserved  // reserved
    )
 {
-    // If wxPython is embedded in another wxWindows app then
-    // the inatance has already been set.
+    // If wxPython is embedded in another wxWidgets app then
+    // the instance has already been set.
     if (! wxGetInstance())
         wxSetInstance(hinstDLL);
     return true;
@@ -121,6 +128,8 @@ wxPyApp::wxPyApp() {
 
 
 wxPyApp::~wxPyApp() {
+    wxPythonApp = NULL;
+    wxApp::SetInstance(NULL);
 }
 
 
@@ -150,7 +159,7 @@ int  wxPyApp::MainLoop() {
 bool wxPyApp::OnInitGui() {
     bool rval=true;
     wxApp::OnInitGui();  // in this case always call the base class version
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (wxPyCBH_findCallback(m_myInst, "OnInitGui"))
         rval = wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
     wxPyEndBlockThreads(blocked);
@@ -160,7 +169,7 @@ bool wxPyApp::OnInitGui() {
 
 int wxPyApp::OnExit() {
     int rval=0;
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (wxPyCBH_findCallback(m_myInst, "OnExit"))
         rval = wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
     wxPyEndBlockThreads(blocked);
@@ -169,29 +178,43 @@ int wxPyApp::OnExit() {
 }
 
 
-#ifdef __WXDEBUG__
-void wxPyApp::OnAssert(const wxChar *file,
-                     int line,
-                     const wxChar *cond,
-                     const wxChar *msg) {
 
+void wxPyApp::ExitMainLoop() {
+    bool found;
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
+    if ((found = wxPyCBH_findCallback(m_myInst, "ExitMainLoop")))
+        wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
+    wxPyEndBlockThreads(blocked);
+    if (! found)
+        wxApp::ExitMainLoop();
+}  
+
+
+#ifdef __WXDEBUG__
+void wxPyApp::OnAssertFailure(const wxChar *file,
+                              int line,
+                              const wxChar *func,
+                              const wxChar *cond,
+                              const wxChar *msg)
+{
     // if we're not fully initialized then just log the error
     if (! m_startupComplete) {
         wxString buf;
         buf.Alloc(4096);
         buf.Printf(wxT("%s(%d): assert \"%s\" failed"),
                    file, line, cond);
-        if (msg != NULL) {
-            buf += wxT(": ");
-            buf += msg;
-        }
+        if ( func && *func )
+            buf << wxT(" in ") << func << wxT("()");
+        if (msg != NULL) 
+            buf << wxT(": ") << msg;
+        
         wxLogDebug(buf);
         return;
     }
 
     // If the OnAssert is overloaded in the Python class then call it...
     bool found;
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if ((found = wxPyCBH_findCallback(m_myInst, "OnAssert"))) {
         PyObject* fso = wx2PyString(file);
         PyObject* cso = wx2PyString(file);
@@ -218,14 +241,15 @@ void wxPyApp::OnAssert(const wxChar *file,
         if (m_assertMode & wxPYAPP_ASSERT_EXCEPTION) {
             wxString buf;
             buf.Alloc(4096);
-            buf.Printf(wxT("C++ assertion \"%s\" failed in %s(%d)"), cond, file, line);
-            if (msg != NULL) {
-                buf += wxT(": ");
-                buf += msg;
-            }
+            buf.Printf(wxT("C++ assertion \"%s\" failed at %s(%d)"), cond, file, line);
+            if ( func && *func )
+                buf << wxT(" in ") << func << wxT("()");
+            if (msg != NULL) 
+                buf << wxT(": ") << msg;
+            
 
             // set the exception
-            bool blocked = wxPyBeginBlockThreads();
+            wxPyBlock_t blocked = wxPyBeginBlockThreads();
             PyObject* s = wx2PyString(buf);
             PyErr_SetObject(wxPyAssertionError, s);
             Py_DECREF(s);
@@ -243,16 +267,16 @@ void wxPyApp::OnAssert(const wxChar *file,
             buf.Alloc(4096);
             buf.Printf(wxT("%s(%d): assert \"%s\" failed"),
                        file, line, cond);
-            if (msg != NULL) {
-                buf += wxT(": ");
-                buf += msg;
-            }
+            if ( func && *func )
+                buf << wxT(" in ") << func << wxT("()");
+            if (msg != NULL) 
+                buf << wxT(": ") << msg;
             wxLogDebug(buf);
         }
 
         // do the normal wx assert dialog?
         if (m_assertMode & wxPYAPP_ASSERT_DIALOG)
-            wxApp::OnAssert(file, line, cond, msg);
+            wxApp::OnAssertFailure(file, line, func, cond, msg);
     }
 }
 #endif
@@ -260,7 +284,7 @@ void wxPyApp::OnAssert(const wxChar *file,
     // For catching Apple Events
 void wxPyApp::MacOpenFile(const wxString &fileName)
 {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (wxPyCBH_findCallback(m_myInst, "MacOpenFile")) {
         PyObject* s = wx2PyString(fileName);
         wxPyCBH_callCallback(m_myInst, Py_BuildValue("(O)", s));
@@ -271,7 +295,7 @@ void wxPyApp::MacOpenFile(const wxString &fileName)
 
 void wxPyApp::MacPrintFile(const wxString &fileName)
 {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (wxPyCBH_findCallback(m_myInst, "MacPrintFile")) {
         PyObject* s = wx2PyString(fileName);
         wxPyCBH_callCallback(m_myInst, Py_BuildValue("(O)", s));
@@ -282,7 +306,7 @@ void wxPyApp::MacPrintFile(const wxString &fileName)
 
 void wxPyApp::MacNewFile()
 {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (wxPyCBH_findCallback(m_myInst, "MacNewFile"))
         wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
     wxPyEndBlockThreads(blocked);
@@ -290,7 +314,7 @@ void wxPyApp::MacNewFile()
 
 void wxPyApp::MacReopenApp()
 {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (wxPyCBH_findCallback(m_myInst, "MacReopenApp"))
         wxPyCBH_callCallback(m_myInst, Py_BuildValue("()"));
     wxPyEndBlockThreads(blocked);
@@ -383,7 +407,8 @@ void wxPyApp::SetMacHelpMenuTitleName(const wxString& val) {
 void wxPyApp::_BootstrapApp()
 {
     static      bool haveInitialized = false;
-    bool        result, blocked;
+    bool        result;
+    wxPyBlock_t     blocked;
     PyObject*   retval = NULL;
     PyObject*   pyint  = NULL;
 
@@ -395,14 +420,18 @@ void wxPyApp::_BootstrapApp()
         int    argc = 0;
         char** argv = NULL;
         blocked = wxPyBeginBlockThreads();
+        
         PyObject* sysargv = PySys_GetObject("argv");
-        if (sysargv != NULL) {
-            argc = PyList_Size(sysargv);
+        PyObject* executable = PySys_GetObject("executable");
+        
+        if (sysargv != NULL && executable != NULL) {
+            argc = PyList_Size(sysargv) + 1;
             argv = new char*[argc+1];
+            argv[0] = strdup(PyString_AsString(executable));
             int x;
-            for(x=0; x<argc; x++) {
-                PyObject *pyArg = PyList_GetItem(sysargv, x);
-                argv[x] = PyString_AsString(pyArg);
+            for(x=1; x<argc; x++) {
+                PyObject *pyArg = PyList_GetItem(sysargv, x-1);
+                argv[x] = strdup(PyString_AsString(pyArg));
             }
             argv[argc] = NULL;
         }
@@ -410,7 +439,7 @@ void wxPyApp::_BootstrapApp()
 
         // Initialize wxWidgets
         result = wxEntryStart(argc, argv);
-        delete [] argv;
+        // wxApp takes ownership of the argv array, don't delete it here
 
         blocked = wxPyBeginBlockThreads();
         if (! result)  {
@@ -430,27 +459,44 @@ void wxPyApp::_BootstrapApp()
         setlocale(LC_NUMERIC, "C");
 #endif
 
-        // The stock objects were all NULL when they were loaded into
-        // SWIG generated proxies, so re-init those now...
-        wxPy_ReinitStockObjects(3);
-
+//        wxSystemOptions::SetOption(wxT("mac.textcontrol-use-mlte"), 1);
+        
         wxPyEndBlockThreads(blocked);
         haveInitialized = true;
     }
+    else {
+        this->argc = 0;
+        this->argv = NULL;
+    }
+    
 
     // It's now ok to generate exceptions for assertion errors.
     wxPythonApp->SetStartupComplete(true);
 
-    // Call the Python wxApp's OnInit function
+   
+    // Call the Python wxApp's OnPreInit and OnInit functions
     blocked = wxPyBeginBlockThreads();
+    if (wxPyCBH_findCallback(m_myInst, "OnPreInit")) {
+        PyObject* method = m_myInst.GetLastFound();
+        PyObject* argTuple = PyTuple_New(0);
+        retval = PyEval_CallObject(method, argTuple);
+        m_myInst.clearRecursionGuard(method);
+        Py_DECREF(argTuple);
+        Py_DECREF(method);
+        if (retval == NULL)
+            goto error;
+    }
     if (wxPyCBH_findCallback(m_myInst, "OnInit")) {
 
         PyObject* method = m_myInst.GetLastFound();
         PyObject* argTuple = PyTuple_New(0);
         retval = PyEval_CallObject(method, argTuple);
+        m_myInst.clearRecursionGuard(method);
         Py_DECREF(argTuple);
         Py_DECREF(method);
         if (retval == NULL)
+            // Don't PyErr_Print here, let the exception in this case go back
+            // up to the wx.PyApp.__init__ scope.
             goto error;
 
         pyint = PyNumber_Int(retval);
@@ -539,6 +585,9 @@ void __wxPyPreStart(PyObject* moduleDict)
 #endif
 
 #ifdef WXP_WITH_THREAD
+#if wxPyUSE_GIL_STATE
+    PyEval_InitThreads();
+#else
     PyEval_InitThreads();
     wxPyTStates = new wxPyThreadStateArray;
     wxPyTMutex = new wxMutex;
@@ -546,14 +595,12 @@ void __wxPyPreStart(PyObject* moduleDict)
     // Save the current (main) thread state in our array
     PyThreadState* tstate = wxPyBeginAllowThreads();
     wxPyEndAllowThreads(tstate);
+#endif
 #endif
 
     // Ensure that the build options in the DLL (or whatever) match this build
     wxApp::CheckBuildOptions(WX_BUILD_OPTIONS_SIGNATURE, "wxPython");
 
-    // Init the stock objects to a non-NULL value so SWIG doesn't create them as None
-    wxPy_ReinitStockObjects(1);
-
     wxInitAllImageHandlers();
 }
 
@@ -566,12 +613,14 @@ void __wxPyCleanup() {
         wxEntryCleanup();
     }
 #ifdef WXP_WITH_THREAD
+#if !wxPyUSE_GIL_STATE
     delete wxPyTMutex;
     wxPyTMutex = NULL;
     wxPyTStates->Empty();
     delete wxPyTStates;
     wxPyTStates = NULL;
 #endif
+#endif
 }
 
 
@@ -665,7 +714,20 @@ PyObject* __wxPySetDictionary(PyObject* /* self */, PyObject* args)
 #else
     _AddInfoString("wx-assertions-off");
 #endif
-
+    _AddInfoString(wxPy_SWIG_VERSION);    
+#ifdef __WXMAC__
+    #if wxMAC_USE_CORE_GRAPHICS
+        _AddInfoString("mac-cg");
+    #else
+        _AddInfoString("mac-qd");
+    #endif
+    #if wxMAC_USE_NATIVE_TOOLBAR
+        _AddInfoString("mac-native-tb");
+    #else
+        _AddInfoString("mac-no-native-tb");
+    #endif
+#endif
+        
 #undef _AddInfoString
 
     PyObject* PlatInfoTuple = PyList_AsTuple(PlatInfo);
@@ -676,178 +738,6 @@ PyObject* __wxPySetDictionary(PyObject* /* self */, PyObject* args)
 }
 
 
-//---------------------------------------------------------------------------
-
-// Python's PyInstance_Check does not return True for instances of new-style
-// classes.  This should get close enough for both new and old classes but I
-// should re-evaluate the need for doing instance checks...
-bool wxPyInstance_Check(PyObject* obj) {
-    return PyObject_HasAttrString(obj, "__class__") != 0;
-}
-
-
-// This one checks if the object is an instance of a SWIG proxy class (it has
-// a .this attribute)
-bool wxPySwigInstance_Check(PyObject* obj) {
-    return PyObject_HasAttrString(obj, "this") != 0;
-}
-
-//---------------------------------------------------------------------------
-
-// The stock objects are no longer created when the wx._core_ module is
-// imported, but only after the app object has been created.  The
-// wxPy_ReinitStockObjects function will be called 3 times to pass the stock
-// objects though various stages of evolution:
-//
-//   pass 1: Set all the pointers to a non-NULL value so the Python proxy
-//           object will be created (otherwise SWIG will just use None.)
-//
-//   pass 2: After the module has been imported and the python proxys have
-//           been created, then set the __class__ to be _wxPyUnbornObject so
-//           it will catch any access to the object and will raise an exception.
-//
-//   pass 3: Finally, from BootstrapApp patch things up so the stock objects
-//           can be used.
-
-
-PyObject* __wxPyFixStockObjects(PyObject* /* self */, PyObject* args)
-{
-    wxPy_ReinitStockObjects(2);
-    RETURN_NONE();
-}
-
-
-static void rsoPass2(const char* name)
-{
-    static PyObject* unbornObjectClass = NULL;
-    PyObject* obj;
-
-    if (unbornObjectClass == NULL) {
-        unbornObjectClass = PyDict_GetItemString(wxPython_dict, "_wxPyUnbornObject");
-        Py_INCREF(unbornObjectClass);
-    }
-
-    // Find the object instance
-    obj = PyDict_GetItemString(wxPython_dict, (char*)dropwx(name));
-    wxCHECK_RET(obj != NULL, wxT("Unable to find stock object"));
-    wxCHECK_RET(wxPySwigInstance_Check(obj), wxT("Not a swig instance"));
-
-    // Change its class
-    PyObject_SetAttrString(obj, "__class__",  unbornObjectClass);
-
-}
-
-static void rsoPass3(const char* name, const char* classname, void* ptr)
-{
-    PyObject* obj;
-    PyObject* classobj;
-    PyObject* ptrobj;
-
-    // Find the object instance
-    obj = PyDict_GetItemString(wxPython_dict, (char*)dropwx(name));
-    wxCHECK_RET(obj != NULL, wxT("Unable to find stock object"));
-    wxCHECK_RET(wxPySwigInstance_Check(obj), wxT("Not a swig instance"));
-
-    // Find the class object and put it back in the instance
-    classobj = PyDict_GetItemString(wxPython_dict, (char*)dropwx(classname));
-    wxCHECK_RET(classobj != NULL, wxT("Unable to find stock class object"));
-    PyObject_SetAttrString(obj, "__class__",  classobj);
-
-    // Rebuild the .this swigified pointer with the new value of the C++ pointer
-    ptrobj = wxPyMakeSwigPtr(ptr, wxString(classname, *wxConvCurrent));
-    PyObject_SetAttrString(obj, "this", ptrobj);
-    Py_DECREF(ptrobj);
-}
-
-
-
-void wxPy_ReinitStockObjects(int pass)
-{
-
-    // If there is already an App object then wxPython is probably embedded in
-    // a wx C++ application, so there is no need to do all this.
-    static bool embedded = false;
-    if ((pass == 1 || pass == 2) && wxTheApp) {
-        embedded = true;
-        return;
-    }
-    if (pass == 3 && embedded)
-        return;
-
-
-#define REINITOBJ(name, classname) \
-    if (pass == 1) { name = (classname*)0xC0C0C0C0; } \
-    else if (pass == 2) { rsoPass2(#name); } \
-    else if (pass == 3) { rsoPass3(#name, #classname, (void*)name); }
-
-
-#define REINITOBJ2(name, classname) \
-    if (pass == 1) { } \
-    else if (pass == 2) { rsoPass2(#name); } \
-    else if (pass == 3) { rsoPass3(#name, #classname, (void*)&name); }
-
-
-    REINITOBJ(wxNORMAL_FONT, wxFont);
-    REINITOBJ(wxSMALL_FONT, wxFont);
-    REINITOBJ(wxITALIC_FONT, wxFont);
-    REINITOBJ(wxSWISS_FONT, wxFont);
-
-    REINITOBJ(wxRED_PEN, wxPen);
-    REINITOBJ(wxCYAN_PEN, wxPen);
-    REINITOBJ(wxGREEN_PEN, wxPen);
-    REINITOBJ(wxBLACK_PEN, wxPen);
-    REINITOBJ(wxWHITE_PEN, wxPen);
-    REINITOBJ(wxTRANSPARENT_PEN, wxPen);
-    REINITOBJ(wxBLACK_DASHED_PEN, wxPen);
-    REINITOBJ(wxGREY_PEN, wxPen);
-    REINITOBJ(wxMEDIUM_GREY_PEN, wxPen);
-    REINITOBJ(wxLIGHT_GREY_PEN, wxPen);
-
-    REINITOBJ(wxBLUE_BRUSH, wxBrush);
-    REINITOBJ(wxGREEN_BRUSH, wxBrush);
-    REINITOBJ(wxWHITE_BRUSH, wxBrush);
-    REINITOBJ(wxBLACK_BRUSH, wxBrush);
-    REINITOBJ(wxTRANSPARENT_BRUSH, wxBrush);
-    REINITOBJ(wxCYAN_BRUSH, wxBrush);
-    REINITOBJ(wxRED_BRUSH, wxBrush);
-    REINITOBJ(wxGREY_BRUSH, wxBrush);
-    REINITOBJ(wxMEDIUM_GREY_BRUSH, wxBrush);
-    REINITOBJ(wxLIGHT_GREY_BRUSH, wxBrush);
-
-    REINITOBJ(wxBLACK, wxColour);
-    REINITOBJ(wxWHITE, wxColour);
-    REINITOBJ(wxRED, wxColour);
-    REINITOBJ(wxBLUE, wxColour);
-    REINITOBJ(wxGREEN, wxColour);
-    REINITOBJ(wxCYAN, wxColour);
-    REINITOBJ(wxLIGHT_GREY, wxColour);
-
-    REINITOBJ(wxSTANDARD_CURSOR, wxCursor);
-    REINITOBJ(wxHOURGLASS_CURSOR, wxCursor);
-    REINITOBJ(wxCROSS_CURSOR, wxCursor);
-
-    REINITOBJ2(wxNullBitmap, wxBitmap);
-    REINITOBJ2(wxNullIcon, wxIcon);
-    REINITOBJ2(wxNullCursor, wxCursor);
-    REINITOBJ2(wxNullPen, wxPen);
-    REINITOBJ2(wxNullBrush, wxBrush);
-    REINITOBJ2(wxNullPalette, wxPalette);
-    REINITOBJ2(wxNullFont, wxFont);
-    REINITOBJ2(wxNullColour, wxColour);
-
-    REINITOBJ(wxTheFontList, wxFontList);
-    REINITOBJ(wxThePenList, wxPenList);
-    REINITOBJ(wxTheBrushList, wxBrushList);
-    REINITOBJ(wxTheColourDatabase, wxColourDatabase);
-
-
-    REINITOBJ2(wxDefaultValidator, wxValidator);
-    REINITOBJ2(wxNullImage, wxImage);
-    REINITOBJ2(wxNullAcceleratorTable, wxAcceleratorTable);
-
-#undef REINITOBJ
-#undef REINITOBJ2
-}
 
 //---------------------------------------------------------------------------
 
@@ -868,7 +758,7 @@ bool wxPyCheckForApp() {
 
 void wxPyUserData_dtor(wxPyUserData* self) {
     if (! wxPyDoingCleanup) {
-        bool blocked = wxPyBeginBlockThreads();
+        wxPyBlock_t blocked = wxPyBeginBlockThreads();
         Py_DECREF(self->m_obj);
         self->m_obj = NULL;
         wxPyEndBlockThreads(blocked);
@@ -880,7 +770,7 @@ void wxPyClientData_dtor(wxPyClientData* self) {
     if (! wxPyDoingCleanup) {           // Don't do it during cleanup as Python
                                         // may have already garbage collected the object...
         if (self->m_incRef) {
-            bool blocked = wxPyBeginBlockThreads();
+            wxPyBlock_t blocked = wxPyBeginBlockThreads();
             Py_DECREF(self->m_obj);
             wxPyEndBlockThreads(blocked);
         }
@@ -902,7 +792,7 @@ void wxPyOORClientData_dtor(wxPyOORClientData* self) {
 
     static PyObject* deadObjectClass = NULL;
 
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (deadObjectClass == NULL) {
         deadObjectClass = PyDict_GetItemString(wxPython_dict, "_wxPyDeadObject");
         // TODO:  Can not wxASSERT here because inside a wxPyBeginBlock Threads,
@@ -976,6 +866,7 @@ void wxPyPtrTypeMap_Add(const char* commonName, const char* ptrName) {
 PyObject*  wxPyMake_wxObject(wxObject* source, bool setThisOwn, bool checkEvtHandler) {
     PyObject* target = NULL;
     bool      isEvtHandler = false;
+    bool      isSizer = false;
 
     if (source) {
         // If it's derived from wxEvtHandler then there may
@@ -992,6 +883,18 @@ PyObject*  wxPyMake_wxObject(wxObject* source, bool setThisOwn, bool checkEvtHan
             }
         }
 
+        // Also check for wxSizer
+        if (!target && wxIsKindOf(source, wxSizer)) {
+            isSizer = true;
+            wxSizer* sz = (wxSizer*)source;
+            wxPyOORClientData* data = (wxPyOORClientData*)sz->GetClientObject();
+            if (data) {
+                target = data->m_obj;
+                if (target)
+                    Py_INCREF(target);
+            }
+        }
+        
         if (! target) {
             // Otherwise make it the old fashioned way by making a new shadow
             // object and putting this pointer in it.  Look up the class
@@ -1009,6 +912,8 @@ PyObject*  wxPyMake_wxObject(wxObject* source, bool setThisOwn, bool checkEvtHan
                 target = wxPyConstructObject((void*)source, name, setThisOwn);
                 if (target && isEvtHandler)
                     ((wxEvtHandler*)source)->SetClientObject(new wxPyOORClientData(target));
+                if (target && isSizer)
+                    ((wxSizer*)source)->SetClientObject(new wxPyOORClientData(target));
             } else {
                 wxString msg(wxT("wxPython class not found for "));
                 msg += source->GetClassInfo()->GetClassName();
@@ -1024,25 +929,8 @@ PyObject*  wxPyMake_wxObject(wxObject* source, bool setThisOwn, bool checkEvtHan
 
 
 PyObject*  wxPyMake_wxSizer(wxSizer* source, bool setThisOwn) {
-    PyObject* target = NULL;
 
-    if (source && wxIsKindOf(source, wxSizer)) {
-        // If it's derived from wxSizer then there may already be a pointer to
-        // a Python object that we can use in the OOR data.
-        wxSizer* sz = (wxSizer*)source;
-        wxPyOORClientData* data = (wxPyOORClientData*)sz->GetClientObject();
-        if (data) {
-            target = data->m_obj;
-            if (target)
-                Py_INCREF(target);
-        }
-    }
-    if (! target) {
-        target = wxPyMake_wxObject(source, setThisOwn, false);
-        if (target != Py_None)
-            ((wxSizer*)source)->SetClientObject(new wxPyOORClientData(target));
-    }
-    return target;
+    return wxPyMake_wxObject(source, setThisOwn);
 }
 
 
@@ -1050,6 +938,8 @@ PyObject*  wxPyMake_wxSizer(wxSizer* source, bool setThisOwn) {
 
 
 #ifdef WXP_WITH_THREAD
+#if !wxPyUSE_GIL_STATE
+
 inline
 unsigned long wxPyGetCurrentThreadId() {
     return wxThread::GetCurrentId();
@@ -1110,6 +1000,7 @@ void wxPySaveThreadState(PyThreadState* tstate) {
 }
 
 #endif
+#endif
 
 
 
@@ -1119,7 +1010,9 @@ void wxPySaveThreadState(PyThreadState* tstate) {
 PyThreadState* wxPyBeginAllowThreads() {
 #ifdef WXP_WITH_THREAD
     PyThreadState* saved = PyEval_SaveThread();  // Py_BEGIN_ALLOW_THREADS;
+#if !wxPyUSE_GIL_STATE
     wxPySaveThreadState(saved);
+#endif
     return saved;
 #else
     return NULL;
@@ -1137,17 +1030,21 @@ void wxPyEndAllowThreads(PyThreadState* saved) {
 // Calls from wxWindows back to Python code, or even any PyObject
 // manipulations, PyDECREF's and etc. are wrapped in calls to these functions:
 
-bool wxPyBeginBlockThreads() {
+wxPyBlock_t wxPyBeginBlockThreads() {
 #ifdef WXP_WITH_THREAD
-    // This works in for 2.3, maybe a good alternative to find the needed tstate?
-    // PyThreadState *check = PyGILState_GetThisThreadState();
-
+    if (! Py_IsInitialized()) {
+        return (wxPyBlock_t)0;
+    }
+#if wxPyUSE_GIL_STATE
+    PyGILState_STATE state = PyGILState_Ensure();
+    return state;
+#else
     PyThreadState *current = _PyThreadState_Current;
 
     // Only block if there wasn't already a tstate, or if the current one is
     // not the one we are wanting to change to.  This should prevent deadlock
     // if there are nested calls to wxPyBeginBlockThreads
-    bool blocked = false;
+    wxPyBlock_t blocked = false;
     wxPyThreadState* tstate = wxPyGetThreadState();
     if (current != tstate->tstate) {
         PyEval_RestoreThread(tstate->tstate);
@@ -1155,11 +1052,20 @@ bool wxPyBeginBlockThreads() {
     }
     return blocked;
 #endif
+#else
+    return (wxPyBlock_t)0;
+#endif
 }
 
 
-void wxPyEndBlockThreads(bool blocked) {
+void wxPyEndBlockThreads(wxPyBlock_t blocked) {
 #ifdef WXP_WITH_THREAD
+    if (! Py_IsInitialized()) {
+        return;
+    }            
+#if wxPyUSE_GIL_STATE
+    PyGILState_Release(blocked);
+#else
     // Only unblock if we blocked in the last call to wxPyBeginBlockThreads.
     // The value of blocked passed in needs to be the same as that returned
     // from wxPyBeginBlockThreads at the same nesting level.
@@ -1167,6 +1073,7 @@ void wxPyEndBlockThreads(bool blocked) {
         PyEval_SaveThread();
     }
 #endif
+#endif
 }
 
 
@@ -1204,7 +1111,7 @@ PyObject* wxPyInputStream::read(int size) {
 
     // check if we have a real wxInputStream to work with
     if (!m_wxis) {
-        bool blocked = wxPyBeginBlockThreads();
+        wxPyBlock_t blocked = wxPyBeginBlockThreads();
         PyErr_SetString(PyExc_IOError, "no valid C-wxInputStream");
         wxPyEndBlockThreads(blocked);
         return NULL;
@@ -1223,7 +1130,7 @@ PyObject* wxPyInputStream::read(int size) {
     }
 
     // error check
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     wxStreamError err = m_wxis->GetLastError();
     if (err != wxSTREAM_NO_ERROR && err != wxSTREAM_EOF) {
         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
@@ -1245,7 +1152,7 @@ PyObject* wxPyInputStream::readline(int size) {
 
     // check if we have a real wxInputStream to work with
     if (!m_wxis) {
-        bool blocked = wxPyBeginBlockThreads();
+        wxPyBlock_t blocked = wxPyBeginBlockThreads();
         PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream");
         wxPyEndBlockThreads(blocked);
         return NULL;
@@ -1258,7 +1165,7 @@ PyObject* wxPyInputStream::readline(int size) {
     }
 
     // errorcheck
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     wxStreamError err = m_wxis->GetLastError();
     if (err != wxSTREAM_NO_ERROR && err != wxSTREAM_EOF) {
         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
@@ -1277,19 +1184,19 @@ PyObject* wxPyInputStream::readlines(int sizehint) {
 
     // check if we have a real wxInputStream to work with
     if (!m_wxis) {
-        bool blocked = wxPyBeginBlockThreads();
+        wxPyBlock_t blocked = wxPyBeginBlockThreads();
         PyErr_SetString(PyExc_IOError,"no valid C-wxInputStream");
         wxPyEndBlockThreads(blocked);
         return NULL;
     }
 
     // init list
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     pylist = PyList_New(0);
     wxPyEndBlockThreads(blocked);
 
     if (!pylist) {
-        bool blocked = wxPyBeginBlockThreads();
+        wxPyBlock_t blocked = wxPyBeginBlockThreads();
         PyErr_NoMemory();
         wxPyEndBlockThreads(blocked);
         return NULL;
@@ -1300,12 +1207,12 @@ PyObject* wxPyInputStream::readlines(int sizehint) {
     for (i=0; (m_wxis->CanRead()) && ((sizehint < 0) || (i < sizehint));) {
         PyObject* s = this->readline();
         if (s == NULL) {
-            bool blocked = wxPyBeginBlockThreads();
+            wxPyBlock_t blocked = wxPyBeginBlockThreads();
             Py_DECREF(pylist);
             wxPyEndBlockThreads(blocked);
             return NULL;
         }
-        bool blocked = wxPyBeginBlockThreads();
+        wxPyBlock_t blocked = wxPyBeginBlockThreads();
         PyList_Append(pylist, s);
         i += PyString_Size(s);
         wxPyEndBlockThreads(blocked);
@@ -1314,7 +1221,7 @@ PyObject* wxPyInputStream::readlines(int sizehint) {
     // error check
     wxStreamError err = m_wxis->GetLastError();
     if (err != wxSTREAM_NO_ERROR && err != wxSTREAM_EOF) {
-        bool blocked = wxPyBeginBlockThreads();
+        wxPyBlock_t blocked = wxPyBeginBlockThreads();
         Py_DECREF(pylist);
         PyErr_SetString(PyExc_IOError,"IOError in wxInputStream");
         wxPyEndBlockThreads(blocked);
@@ -1356,7 +1263,7 @@ wxPyCBInputStream::wxPyCBInputStream(const wxPyCBInputStream& other)
 
 
 wxPyCBInputStream::~wxPyCBInputStream() {
-    bool blocked=false;
+    wxPyBlock_t blocked;
     if (m_block) blocked = wxPyBeginBlockThreads();
     Py_XDECREF(m_read);
     Py_XDECREF(m_seek);
@@ -1366,7 +1273,7 @@ wxPyCBInputStream::~wxPyCBInputStream() {
 
 
 wxPyCBInputStream* wxPyCBInputStream::create(PyObject *py, bool block) {
-    bool blocked=false;
+    wxPyBlock_t blocked;
     if (block) blocked = wxPyBeginBlockThreads();
 
     PyObject* read = getMethod(py, "read");
@@ -1424,7 +1331,7 @@ size_t wxPyCBInputStream::OnSysRead(void *buffer, size_t bufsize) {
     if (bufsize == 0)
         return 0;
 
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     PyObject* arglist = Py_BuildValue("(i)", bufsize);
     PyObject* result = PyEval_CallObject(m_read, arglist);
     Py_DECREF(arglist);
@@ -1453,7 +1360,7 @@ size_t wxPyCBInputStream::OnSysWrite(const void *buffer, size_t bufsize) {
 
 
 wxFileOffset wxPyCBInputStream::OnSysSeek(wxFileOffset off, wxSeekMode mode) {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     PyObject* arglist = PyTuple_New(2);
 
     if (sizeof(wxFileOffset) > sizeof(long))
@@ -1474,7 +1381,7 @@ wxFileOffset wxPyCBInputStream::OnSysSeek(wxFileOffset off, wxSeekMode mode) {
 
 
 wxFileOffset wxPyCBInputStream::OnSysTell() const {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     PyObject* arglist = Py_BuildValue("()");
     PyObject* result = PyEval_CallObject(m_tell, arglist);
     Py_DECREF(arglist);
@@ -1492,7 +1399,7 @@ wxFileOffset wxPyCBInputStream::OnSysTell() const {
 
 //----------------------------------------------------------------------
 
-IMPLEMENT_ABSTRACT_CLASS(wxPyCallback, wxEvtHandler);
+IMPLEMENT_ABSTRACT_CLASS(wxPyCallback, wxObject);
 
 wxPyCallback::wxPyCallback(PyObject* func) {
     m_func = func;
@@ -1505,7 +1412,7 @@ wxPyCallback::wxPyCallback(const wxPyCallback& other) {
 }
 
 wxPyCallback::~wxPyCallback() {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     Py_DECREF(m_func);
     wxPyEndBlockThreads(blocked);
 }
@@ -1523,7 +1430,7 @@ void wxPyCallback::EventThunker(wxEvent& event) {
     PyObject*       tuple;
     bool            checkSkip = false;
 
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     wxString className = event.GetClassInfo()->GetClassName();
 
     // If the event is one of these types then pass the original
@@ -1688,45 +1595,81 @@ PyObject* PyFindClassWithAttr(PyObject *klass, PyObject *name)
 
 
 static
-PyObject* PyMethod_GetDefiningClass(PyObject* method, const char* name)
+PyObject* PyMethod_GetDefiningClass(PyObject* method, PyObject* nameo)
 {
     PyObject* mgc = PyMethod_GET_CLASS(method);
 
 #if PYTHON_API_VERSION <= 1010    // prior to Python 2.2, the easy way
     return mgc;
 #else                             // 2.2 and after, the hard way...
-
-    PyObject* nameo = PyString_FromString(name);
-    PyObject* klass = PyFindClassWithAttr(mgc, nameo);
-    Py_DECREF(nameo);
-    return klass;
+    return PyFindClassWithAttr(mgc, nameo);
 #endif
 }
 
 
 
-bool wxPyCallbackHelper::findCallback(const char* name) const {
+// To avoid recursion when an overridden virtual method wants to call the base
+// class version, temporarily set an attribute in the instance with the same
+// name as the method.  Then the PyObject_GetAttr in the next findCallback
+// will return this attribute and the PyMethod_Check will fail.
+
+void wxPyCallbackHelper::setRecursionGuard(PyObject* method) const
+{
+    PyFunctionObject* func = (PyFunctionObject*)PyMethod_Function(method);
+    PyObject_SetAttr(m_self, func->func_name, Py_None);
+}
+
+void wxPyCallbackHelper::clearRecursionGuard(PyObject* method) const
+{
+    PyFunctionObject* func = (PyFunctionObject*)PyMethod_Function(method);
+    if (PyObject_HasAttr(m_self, func->func_name)) {
+        PyObject_DelAttr(m_self, func->func_name);
+    }
+}
+
+// bool wxPyCallbackHelper::hasRecursionGuard(PyObject* method) const
+// {
+//     PyFunctionObject* func = (PyFunctionObject*)PyMethod_Function(method);
+//     if (PyObject_HasAttr(m_self, func->func_name)) {
+//         PyObject* attr = PyObject_GetAttr(m_self, func->func_name);
+//         bool retval = (attr == Py_None);
+//         Py_DECREF(attr);
+//         return retval;
+//     }
+//     return false;
+// }
+
+
+bool wxPyCallbackHelper::findCallback(const char* name, bool setGuard) const {
     wxPyCallbackHelper* self = (wxPyCallbackHelper*)this; // cast away const
+    PyObject *method, *klass;
+    PyObject* nameo = PyString_FromString(name);
     self->m_lastFound = NULL;
 
     // If the object (m_self) has an attibute of the given name...
-    if (m_self && PyObject_HasAttrString(m_self, (char*)name)) {
-        PyObject *method, *klass;
-        method = PyObject_GetAttrString(m_self, (char*)name);
+    if (m_self && PyObject_HasAttr(m_self, nameo)) {
+        method = PyObject_GetAttr(m_self, nameo);
 
         // ...and if that attribute is a method, and if that method's class is
-        // not from a base class...
+        // not from the registered class or a base class...
         if (PyMethod_Check(method) &&
-            (klass = PyMethod_GetDefiningClass(method, (char*)name)) != NULL &&
-            ((klass == m_class) || PyObject_IsSubclass(klass, m_class))) {
-
-            // ...then we'll save a pointer to the method so callCallback can call it.
+            (klass = PyMethod_GetDefiningClass(method, nameo)) != NULL &&
+            (klass != m_class) &&
+            PyObject_IsSubclass(klass, m_class)) {
+
+            // ...then we'll save a pointer to the method so callCallback can
+            // call it.  But first, set a recursion guard in case the
+            // overridden method wants to call the base class version.
+            if (setGuard)
+                setRecursionGuard(method);
             self->m_lastFound = method;
         }
         else {
             Py_DECREF(method);
         }
     }
+    
+    Py_DECREF(nameo);
     return m_lastFound != NULL;
 }
 
@@ -1755,6 +1698,8 @@ PyObject* wxPyCallbackHelper::callCallbackObj(PyObject* argTuple) const {
     PyObject* method = m_lastFound;
 
     result = PyEval_CallObject(method, argTuple);
+    clearRecursionGuard(method);
+    
     Py_DECREF(argTuple);
     Py_DECREF(method);
     if (!result) {
@@ -1768,8 +1713,8 @@ void wxPyCBH_setCallbackInfo(wxPyCallbackHelper& cbh, PyObject* self, PyObject*
     cbh.setSelf(self, klass, incref);
 }
 
-bool wxPyCBH_findCallback(const wxPyCallbackHelper& cbh, const char* name) {
-    return cbh.findCallback(name);
+bool wxPyCBH_findCallback(const wxPyCallbackHelper& cbh, const char* name, bool setGuard) {
+    return cbh.findCallback(name, setGuard);
 }
 
 int  wxPyCBH_callCallback(const wxPyCallbackHelper& cbh, PyObject* argTuple) {
@@ -1783,7 +1728,7 @@ PyObject* wxPyCBH_callCallbackObj(const wxPyCallbackHelper& cbh, PyObject* argTu
 
 void wxPyCBH_delete(wxPyCallbackHelper* cbh) {
     if (cbh->m_incRef) {
-        bool blocked = wxPyBeginBlockThreads();
+        wxPyBlock_t blocked = wxPyBeginBlockThreads();
         Py_XDECREF(cbh->m_self);
         Py_XDECREF(cbh->m_class);
         wxPyEndBlockThreads(blocked);
@@ -1804,14 +1749,14 @@ wxPyEvtSelfRef::wxPyEvtSelfRef() {
 }
 
 wxPyEvtSelfRef::~wxPyEvtSelfRef() {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (m_cloned)
         Py_DECREF(m_self);
     wxPyEndBlockThreads(blocked);
 }
 
 void wxPyEvtSelfRef::SetSelf(PyObject* self, bool clone) {
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     if (m_cloned)
         Py_DECREF(m_self);
     m_self = self;
@@ -1878,7 +1823,7 @@ PyObject* wxPy_ConvertList(wxListBase* listbase) {
     wxObject*   wxObj;
     wxNode*     node = list->GetFirst();
 
-    bool blocked = wxPyBeginBlockThreads();
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
     pyList = PyList_New(0);
     while (node) {
         wxObj = node->GetData();
@@ -1947,7 +1892,7 @@ wxString* wxString_in_helper(PyObject* source) {
         str = PyObject_Str(source);
         if (PyErr_Occurred()) return NULL;
     }
-    char* tmpPtr; int tmpSize;
+    char* tmpPtr; Py_ssize_t tmpSize;
     PyString_AsStringAndSize(str, &tmpPtr, &tmpSize);
     target = new wxString(tmpPtr, tmpSize);
 
@@ -1990,7 +1935,7 @@ wxString Py2wxString(PyObject* source)
         str = PyObject_Str(source);
         if (PyErr_Occurred()) return wxEmptyString;    // TODO:  should we PyErr_Clear?
     }
-    char* tmpPtr; int tmpSize;
+    char* tmpPtr; Py_ssize_t tmpSize;
     PyString_AsStringAndSize(str, &tmpPtr, &tmpSize);
     target = wxString(tmpPtr, tmpSize);
 
@@ -2579,7 +2524,7 @@ bool wxColour_helper(PyObject* source, wxColour** obj) {
             return true;
         }
     }
-    // last chance: 3-tuple of integers is expected
+    // last chance: 3-tuple or 4-tuple of integers is expected
     else if (PySequence_Check(source) && PyObject_Length(source) == 3) {
         PyObject* o1 = PySequence_GetItem(source, 0);
         PyObject* o2 = PySequence_GetItem(source, 1);
@@ -2596,10 +2541,29 @@ bool wxColour_helper(PyObject* source, wxColour** obj) {
         Py_DECREF(o3);
         return true;
     }
+    else if (PySequence_Check(source) && PyObject_Length(source) == 4) {
+        PyObject* o1 = PySequence_GetItem(source, 0);
+        PyObject* o2 = PySequence_GetItem(source, 1);
+        PyObject* o3 = PySequence_GetItem(source, 2);
+        PyObject* o4 = PySequence_GetItem(source, 3);
+        if (!PyNumber_Check(o1) || !PyNumber_Check(o2) || !PyNumber_Check(o3) || !PyNumber_Check(o4)) {
+            Py_DECREF(o1);
+            Py_DECREF(o2);
+            Py_DECREF(o3);
+            Py_DECREF(o4);
+            goto error;
+        }
+        **obj = wxColour(PyInt_AsLong(o1), PyInt_AsLong(o2), PyInt_AsLong(o3), PyInt_AsLong(o4));
+        Py_DECREF(o1);
+        Py_DECREF(o2);
+        Py_DECREF(o3);
+        Py_DECREF(o4);
+        return true;
+    }
 
  error:
     PyErr_SetString(PyExc_TypeError,
-                    "Expected a wxColour object or a string containing a colour name or '#RRGGBB'.");
+                    "Expected a wxColour object, a string containing a colour name or '#RRGGBB', or a 3- or 4-tuple of integers.");
     return false;
 }
 
@@ -2683,6 +2647,201 @@ PyObject* wxArrayInt2PyList_helper(const wxArrayInt& arr) {
 }
 
 
+//----------------------------------------------------------------------
+// wxPyImageHandler methods
+//
+// TODO: Switch these to use wxPython's standard macros and helper classes
+//       for calling callbacks.
+
+PyObject* wxPyImageHandler::m_DoCanRead_Name = NULL;
+PyObject* wxPyImageHandler::m_GetImageCount_Name = NULL;
+PyObject* wxPyImageHandler::m_LoadFile_Name = NULL;
+PyObject* wxPyImageHandler::m_SaveFile_Name = NULL;
+
+PyObject* wxPyImageHandler::py_InputStream(wxInputStream* stream) {
+    return wxPyConstructObject(new wxPyInputStream(stream),
+                               wxT("wxPyInputStream"), 0);
+}
+
+PyObject* wxPyImageHandler::py_Image(wxImage* image) {
+    return wxPyConstructObject(image, wxT("wxImage"), 0);
+}
+
+PyObject* wxPyImageHandler::py_OutputStream(wxOutputStream* stream) {
+    return wxPyConstructObject(stream, wxT("wxOutputStream"), 0);
+}
+
+wxPyImageHandler::wxPyImageHandler():
+    m_self(NULL)
+{
+    if (!m_DoCanRead_Name) {
+        m_DoCanRead_Name = PyString_FromString("DoCanRead");
+        m_GetImageCount_Name = PyString_FromString("GetImageCount");
+        m_LoadFile_Name = PyString_FromString("LoadFile");
+        m_SaveFile_Name = PyString_FromString("SaveFile");
+    }
+}
+
+wxPyImageHandler::~wxPyImageHandler() {
+    if (m_self) {
+        Py_DECREF(m_self);
+        m_self = NULL;
+    }
+}
+
+void wxPyImageHandler::_SetSelf(PyObject *self) {
+    // should check here for isinstance(PyImageHandler) ??
+    m_self = self;
+    Py_INCREF(m_self);
+}
+
+bool wxPyImageHandler::DoCanRead(wxInputStream& stream) {
+    // check if our object has this method
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
+    if (!m_self || !PyObject_HasAttr(m_self, m_DoCanRead_Name)) {
+        wxPyEndBlockThreads(blocked);
+        return false;
+    }
+
+    PyObject* res = PyObject_CallMethodObjArgs(m_self, m_DoCanRead_Name,
+                                               py_InputStream(&stream), NULL);
+    bool retval = false;
+    if (res) {
+        retval = PyInt_AsLong(res);
+        Py_DECREF(res);
+        PyErr_Clear();
+    }
+    else
+        PyErr_Print();
+    wxPyEndBlockThreads(blocked);
+    return retval;
+}
+
+bool wxPyImageHandler::LoadFile( wxImage* image, wxInputStream& stream,
+                                 bool verbose, int index ) {
+    // check if our object has this method
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
+    if (!m_self || !PyObject_HasAttr(m_self, m_LoadFile_Name)) {
+        wxPyEndBlockThreads(blocked);
+        return false;
+    }
+    PyObject* res = PyObject_CallMethodObjArgs(m_self, m_LoadFile_Name,
+                                               py_Image(image),
+                                               py_InputStream(&stream),
+                                               PyInt_FromLong(verbose),
+                                               PyInt_FromLong(index),
+                                               NULL);
+    bool retval = false;
+    if (res) {
+        retval = PyInt_AsLong(res);
+        Py_DECREF(res);
+        PyErr_Clear();
+    } else
+        PyErr_Print();
+    wxPyEndBlockThreads(blocked);
+    return retval;
+}
+
+bool wxPyImageHandler::SaveFile( wxImage* image, wxOutputStream& stream,
+                                 bool verbose ) {
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
+    if (!m_self || !PyObject_HasAttr(m_self, m_SaveFile_Name)) {
+        wxPyEndBlockThreads(blocked);
+        return false;
+    }
+    PyObject* res = PyObject_CallMethodObjArgs(m_self, m_SaveFile_Name,
+                                               py_Image(image),
+                                               py_OutputStream(&stream),
+                                               PyInt_FromLong(verbose),
+                                               NULL);
+    bool retval = false;
+    if(res) {
+        retval=PyInt_AsLong(res);
+        Py_DECREF(res);
+        PyErr_Clear();
+    } else
+        PyErr_Print();
+    wxPyEndBlockThreads(blocked);
+    return retval;
+}
+
+int wxPyImageHandler::GetImageCount( wxInputStream& stream ) {
+    wxPyBlock_t blocked = wxPyBeginBlockThreads();
+    if (!m_self || !PyObject_HasAttr(m_self, m_GetImageCount_Name)) {
+        wxPyEndBlockThreads(blocked);
+        return 1;
+    }
+    PyObject *res=PyObject_CallMethodObjArgs(m_self, m_GetImageCount_Name,
+                                             py_InputStream(&stream),
+                                             NULL);
+    int retval = 1;
+    if(res) {
+        retval=PyInt_AsLong(res);
+        Py_DECREF(res);
+        PyErr_Clear();
+    } else
+        PyErr_Print();
+    wxPyEndBlockThreads(blocked);
+    return retval;
+}
+
+
+//----------------------------------------------------------------------
+// Function to test if the Display (or whatever is the platform equivallent)
+// can be connected to.  This is accessable from wxPython as a staticmethod of
+// wx.App called DisplayAvailable().
+
+
+bool wxPyTestDisplayAvailable()
+{
+#ifdef __WXGTK__
+    Display* display;
+    display = XOpenDisplay(NULL);
+    if (display == NULL)
+        return false;
+    XCloseDisplay(display);
+    return true;
+#endif
+
+#ifdef __WXMAC__
+    // This is adapted from Python's Mac/Modules/MacOS.c in the
+    // MacOS_WMAvailable function.
+    bool rv;
+    ProcessSerialNumber psn;
+               
+    /*
+    ** This is a fairly innocuous call to make if we don't have a window
+    ** manager, or if we have no permission to talk to it. It will print
+    ** a message on stderr, but at least it won't abort the process.
+    ** It appears the function caches the result itself, and it's cheap, so
+    ** no need for us to cache.
+    */
+#ifdef kCGNullDirectDisplay
+    /* On 10.1 CGMainDisplayID() isn't available, and
+    ** kCGNullDirectDisplay isn't defined.
+    */
+    if (CGMainDisplayID() == 0) {
+        rv = false;
+    } else 
+#endif
+    {
+        // Also foreground the application on the first call as a side-effect.
+        if (GetCurrentProcess(&psn) < 0 || SetFrontProcess(&psn) < 0) {
+            rv = false;
+        } else {
+            rv = true;
+        }
+    }
+    return rv;
+#endif
+
+#ifdef __WXMSW__
+    // TODO...
+    return true;
+#endif
+}
+
+
 //----------------------------------------------------------------------
 //----------------------------------------------------------------------