Prevent surplus calls of _size_allocate() if no change

[wxWidgets.git] / src / msw / app.cpp

diff --git a/src/msw/app.cpp b/src/msw/app.cpp
index 9c46030706c1d1c2c0cbb1a3b7ff384e596a0c74..eccd8787f485a0a28cd61aab925bb9d47287fc6b 100644 (file)
--- a/src/msw/app.cpp
+++ b/src/msw/app.cpp
@@ -1,12 +1,12 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        app.cpp
+// Name:        src/msw/app.cpp

 // Purpose:     wxApp
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Purpose:     wxApp
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
 // RCS-ID:      $Id$

-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:     wxWindows license
+// Copyright:   (c) Julian Smart
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 // ===========================================================================
 /////////////////////////////////////////////////////////////////////////////
 
 // ===========================================================================


@@ -17,10 +17,6 @@
 // headers
 // ---------------------------------------------------------------------------
 
 // headers
 // ---------------------------------------------------------------------------
 

-#ifdef __GNUG__
-    #pragma implementation "app.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -29,6 +25,8 @@
 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP

+    #include "wx/msw/wrapcctl.h"
+    #include "wx/dynarray.h"

     #include "wx/frame.h"
     #include "wx/app.h"
     #include "wx/utils.h"
     #include "wx/frame.h"
     #include "wx/app.h"
     #include "wx/utils.h"


@@ -42,38 +40,39 @@
     #include "wx/dialog.h"
     #include "wx/msgdlg.h"
     #include "wx/intl.h"
     #include "wx/dialog.h"
     #include "wx/msgdlg.h"
     #include "wx/intl.h"

-    #include "wx/dynarray.h"
-    #include "wx/wxchar.h"
-    #include "wx/icon.h"
+    #include "wx/crt.h"
+    #include "wx/log.h"
+    #include "wx/module.h"

 #endif
 
 #endif
 

-#include "wx/log.h"
-#include "wx/module.h"
+#include "wx/apptrait.h"
+#include "wx/filename.h"
+#include "wx/dynlib.h"
+#include "wx/evtloop.h"
+#include "wx/thread.h"
+#include "wx/scopeguard.h"
+#include "wx/vector.h"

 
 #include "wx/msw/private.h"
 
 #include "wx/msw/private.h"

+#include "wx/msw/dc.h"
+#include "wx/msw/ole/oleutils.h"
+#include "wx/msw/private/timer.h"

 
 

-#if wxUSE_THREADS
-    #include "wx/thread.h"
-
-    // define the array of MSG strutures
-    WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
+#if wxUSE_TOOLTIPS
+    #include "wx/tooltip.h"
+#endif // wxUSE_TOOLTIPS

 
 

-    #include "wx/arrimpl.cpp"
-
-    WX_DEFINE_OBJARRAY(wxMsgArray);
-#endif // wxUSE_THREADS
-
-#if wxUSE_WX_RESOURCES
-    #include "wx/resource.h"
-#endif
-
-// OLE is used for drag-and-drop, clipboard, OLE Automation...
-#ifndef wxUSE_NORLANDER_HEADERS
-#if defined(__GNUWIN32__) || defined(__SC__) || defined(__SALFORDC__)
+// OLE is used for drag-and-drop, clipboard, OLE Automation..., but some
+// compilers don't support it (missing headers, libs, ...)
+#if defined(__GNUWIN32_OLD__) || defined(__SYMANTEC__)

     #undef wxUSE_OLE
 
     #define  wxUSE_OLE 0
 #endif // broken compilers
     #undef wxUSE_OLE
 
     #define  wxUSE_OLE 0
 #endif // broken compilers

+
+#if defined(__POCKETPC__) || defined(__SMARTPHONE__)
+    #include <ole2.h>
+    #include <aygshell.h>

 #endif
 
 #if wxUSE_OLE
 #endif
 
 #if wxUSE_OLE


@@ -83,1025 +82,775 @@
 #include <string.h>
 #include <ctype.h>
 
 #include <string.h>
 #include <ctype.h>
 

-#if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
-    #include <commctrl.h>
-#endif
-
-#include "wx/msw/msvcrt.h"
+#include "wx/msw/missing.h"

 
 

-// ----------------------------------------------------------------------------
-// conditional compilation
-// ----------------------------------------------------------------------------
-
-// The macro _WIN32_IE is defined by commctrl.h (unless it had already been
-// defined before) and shows us what common control features are available
-// during the compile time (it doesn't mean that they will be available during
-// the run-time, use GetComCtl32Version() to test for them!). The possible
-// values are:
+// instead of including <shlwapi.h> which is not part of the core SDK and not
+// shipped at all with other compilers, we always define the parts of it we
+// need here ourselves

 //
 //

-// 0x0200     for comctl32.dll 4.00 shipped with Win95/NT 4.0
-// 0x0300                      4.70              IE 3.x
-// 0x0400                      4.71              IE 4.0
-// 0x0401                      4.72              IE 4.01 and Win98
-// 0x0500                      5.00              IE 5.x and NT 5.0 (Win2000)
-
-#ifndef _WIN32_IE
-    // minimal set of features by default
-    #define _WIN32_IE 0x0200
-#endif
-
-#if _WIN32_IE >= 0x0300
-    #include <shlwapi.h>
+// NB: DLLVER_PLATFORM_WINDOWS will be defined if shlwapi.h had been somehow
+//     included already
+#ifndef DLLVER_PLATFORM_WINDOWS
+    // hopefully we don't need to change packing as DWORDs should be already
+    // correctly aligned
+    struct DLLVERSIONINFO
+    {
+        DWORD cbSize;
+        DWORD dwMajorVersion;                   // Major version
+        DWORD dwMinorVersion;                   // Minor version
+        DWORD dwBuildNumber;                    // Build number
+        DWORD dwPlatformID;                     // DLLVER_PLATFORM_*
+    };
+
+    typedef HRESULT (CALLBACK* DLLGETVERSIONPROC)(DLLVERSIONINFO *);
+#endif // defined(DLLVERSIONINFO)
+
+#ifndef ATTACH_PARENT_PROCESS
+    #define ATTACH_PARENT_PROCESS ((DWORD)-1)

 #endif
 
 // ---------------------------------------------------------------------------
 // global variables
 // ---------------------------------------------------------------------------
 
 #endif
 
 // ---------------------------------------------------------------------------
 // global variables
 // ---------------------------------------------------------------------------
 

-extern wxChar *wxBuffer;
-extern wxChar *wxOsVersion;
-extern wxList *wxWinHandleList;
-extern wxList WXDLLEXPORT wxPendingDelete;
+#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)

 extern void wxSetKeyboardHook(bool doIt);
 extern void wxSetKeyboardHook(bool doIt);

-extern wxCursor *g_globalCursor;
+#endif

 
 

-MSG s_currentMsg;
-wxApp *wxTheApp = NULL;
+// because of mingw32 4.3 bug this struct can't be inside the namespace below:
+// see http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/110282
+struct ClassRegInfo
+{
+    // the base name of the class: this is used to construct the unique name in
+    // RegisterClassWithUniqueNames()
+    wxString basename;

 
 

-// FIXME why not const? and not static?
+    // the name of the registered class with and without CS_[HV]REDRAW styles
+    wxString regname,
+             regnameNR;
+};

 
 

-// NB: all "NoRedraw" classes must have the same names as the "normal" classes
-//     with NR suffix - wxWindow::MSWCreate() supposes this
-wxChar wxFrameClassName[]         = wxT("wxFrameClass");
-wxChar wxFrameClassNameNoRedraw[] = wxT("wxFrameClassNR");
-wxChar wxMDIFrameClassName[]      = wxT("wxMDIFrameClass");
-wxChar wxMDIFrameClassNameNoRedraw[] = wxT("wxMDIFrameClassNR");
-wxChar wxMDIChildFrameClassName[] = wxT("wxMDIChildFrameClass");
-wxChar wxMDIChildFrameClassNameNoRedraw[] = wxT("wxMDIChildFrameClassNR");
-wxChar wxPanelClassName[]         = wxT("wxPanelClass");
-wxChar wxCanvasClassName[]        = wxT("wxCanvasClass");
+namespace
+{

 
 

-HICON wxSTD_FRAME_ICON = (HICON) NULL;
-HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
-HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
+wxVector<ClassRegInfo> gs_regClassesInfo;

 
 

-HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
-HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
-HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
+} // anonymous namespace

 
 

-HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
+// ----------------------------------------------------------------------------
+// private functions
+// ----------------------------------------------------------------------------

 
 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 
 
 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 

-#if wxUSE_RICHEDIT
-    // the handle to richedit DLL and the version of the DLL loaded
-    static HINSTANCE gs_hRichEdit = (HINSTANCE)NULL;
-    static int gs_verRichEdit = -1;
-#endif
-

 // ===========================================================================
 // ===========================================================================

-// implementation
+// wxGUIAppTraits implementation

 // ===========================================================================
 
 // ===========================================================================
 

-// ---------------------------------------------------------------------------
-// wxApp
-// ---------------------------------------------------------------------------
-
-#if !USE_SHARED_LIBRARY
-    IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
-
-    BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
-        EVT_IDLE(wxApp::OnIdle)
-        EVT_END_SESSION(wxApp::OnEndSession)
-        EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
-    END_EVENT_TABLE()
-#endif
-
-//// Initialize
-bool wxApp::Initialize()
+// private class which we use to pass parameters from BeforeChildWaitLoop() to
+// AfterChildWaitLoop()
+struct ChildWaitLoopData

 {
 {

-    // Some people may wish to use this, but
-    // probably it shouldn't be here by default.
-#ifdef __WXDEBUG__
-    //    wxRedirectIOToConsole();
-#endif
-
-    wxBuffer = new wxChar[1500]; // FIXME
-
-    wxClassInfo::InitializeClasses();
-
-#if wxUSE_RESOURCES
-    wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
-#endif
-
-#if wxUSE_THREADS
-    wxPendingEventsLocker = new wxCriticalSection;
-#endif
-
-    wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
-    wxTheColourDatabase->Initialize();
-
-    wxInitializeStockLists();
-    wxInitializeStockObjects();
-
-#if wxUSE_WX_RESOURCES
-    wxInitializeResourceSystem();
-#endif
-
-    wxBitmap::InitStandardHandlers();
-
-#if defined(__WIN95__)
-    InitCommonControls();
-
-#endif // __WIN95__
-
-#if wxUSE_OLE
-
-#ifdef __WIN16__
-    // for OLE, enlarge message queue to be as large as possible
-    int iMsg = 96;
-    while (!SetMessageQueue(iMsg) && (iMsg -= 8))
-        ;
-#endif // Win16
-    // we need to initialize OLE library
-    if ( FAILED(::OleInitialize(NULL)) )
-        wxLogError(_("Cannot initialize OLE"));
-#endif // wxUSE_OLE
-
-#if wxUSE_CTL3D
-    if (!Ctl3dRegister(wxhInstance))
-        wxLogError(wxT("Cannot register CTL3D"));
-
-    Ctl3dAutoSubclass(wxhInstance);
-#endif
-
-    g_globalCursor = new wxCursor;
-
-    // VZ: these icons are not in wx.rc anyhow (but should they?)!
-#if 0
-    wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
-    wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
-    wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
-
-    wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
-    wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
-    wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
-#endif // 0
-
-    RegisterWindowClasses();
-
-    // Create the brush for disabling bitmap buttons
-
-    LOGBRUSH lb;
-    lb.lbStyle = BS_PATTERN;
-    lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
-    if ( lb.lbHatch )
+    ChildWaitLoopData(wxWindowDisabler *wd_, wxWindow *winActive_)

     {
     {

-        wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
-        ::DeleteObject( (HGDIOBJ)lb.lbHatch );
+        wd = wd_;
+        winActive = winActive_;

     }
     }

-    //else: wxWindows resources are probably not linked in
-
-#if wxUSE_PENWINDOWS
-    wxRegisterPenWin();
-#endif

 
 

-    wxWinHandleList = new wxList(wxKEY_INTEGER);
+    wxWindowDisabler *wd;
+    wxWindow *winActive;
+};

 
 

-    // This is to foil optimizations in Visual C++ that throw out dummy.obj.
-    // PLEASE DO NOT ALTER THIS.
-#if defined(__VISUALC__) && !defined(WXMAKINGDLL)
-    extern char wxDummyChar;
-    if (wxDummyChar) wxDummyChar++;
-#endif
-
-    wxSetKeyboardHook(TRUE);
-
-    wxModule::RegisterModules();
-    if (!wxModule::InitializeModules())
-        return FALSE;
-    return TRUE;
+void *wxGUIAppTraits::BeforeChildWaitLoop()
+{
+    /*
+       We use a dirty hack here to disable all application windows (which we
+       must do because otherwise the calls to wxYield() could lead to some very
+       unexpected reentrancies in the users code) but to avoid losing
+       focus/activation entirely when the child process terminates which would
+       happen if we simply disabled everything using wxWindowDisabler. Indeed,
+       remember that Windows will never activate a disabled window and when the
+       last childs window is closed and Windows looks for a window to activate
+       all our windows are still disabled. There is no way to enable them in
+       time because we don't know when the childs windows are going to be
+       closed, so the solution we use here is to keep one special tiny frame
+       enabled all the time. Then when the child terminates it will get
+       activated and when we close it below -- after reenabling all the other
+       windows! -- the previously active window becomes activated again and
+       everything is ok.
+     */
+    wxBeginBusyCursor();
+
+    // first disable all existing windows
+    wxWindowDisabler *wd = new wxWindowDisabler;
+
+    // then create an "invisible" frame: it has minimal size, is positioned
+    // (hopefully) outside the screen and doesn't appear on the taskbar
+    wxWindow *winActive = new wxFrame
+                    (
+                        wxTheApp->GetTopWindow(),
+                        wxID_ANY,
+                        wxEmptyString,
+                        wxPoint(32600, 32600),
+                        wxSize(1, 1),
+                        wxDEFAULT_FRAME_STYLE | wxFRAME_NO_TASKBAR
+                    );
+    winActive->Show();
+
+    return new ChildWaitLoopData(wd, winActive);

 }
 
 }
 

-// ---------------------------------------------------------------------------
-// RegisterWindowClasses
-// ---------------------------------------------------------------------------
-
-// TODO we should only register classes really used by the app. For this it
-//      would be enough to just delay the class registration until an attempt
-//      to create a window of this class is made.
-bool wxApp::RegisterWindowClasses()
+void wxGUIAppTraits::AlwaysYield()

 {
 {

-    WNDCLASS wndclass;
-
-    // for each class we register one with CS_(V|H)REDRAW style and one
-    // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
-    static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
-    static const long styleNoRedraw = CS_DBLCLKS;
-
-    // the fields which are common to all classes
-    wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
-    wndclass.cbClsExtra    = 0;
-    wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
-    wndclass.hInstance     = wxhInstance;
-    wndclass.hIcon         = (HICON) NULL;
-    wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
-    wndclass.lpszMenuName  = NULL;
-
-    // Register the frame window class.
-    wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
-    wndclass.lpszClassName = wxFrameClassName;
-    wndclass.style         = styleNormal;
-
-    if ( !RegisterClass(&wndclass) )
-    {
-        wxLogLastError("RegisterClass(frame)");
-
-        return FALSE;
-    }
-
-    // "no redraw" frame
-    wndclass.lpszClassName = wxFrameClassNameNoRedraw;
-    wndclass.style         = styleNoRedraw;
-
-    if ( !RegisterClass(&wndclass) )
-    {
-        wxLogLastError("RegisterClass(no redraw frame)");
+    wxYield();
+}

 
 

-        return FALSE;
-    }
+void wxGUIAppTraits::AfterChildWaitLoop(void *dataOrig)
+{
+    wxEndBusyCursor();

 
 

-    // Register the MDI frame window class.
-    wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
-    wndclass.lpszClassName = wxMDIFrameClassName;
-    wndclass.style         = styleNormal;
+    ChildWaitLoopData * const data = (ChildWaitLoopData *)dataOrig;

 
 

-    if ( !RegisterClass(&wndclass) )
-    {
-        wxLogLastError("RegisterClass(MDI parent)");
+    delete data->wd;

 
 

-        return FALSE;
-    }
+    // finally delete the dummy frame and, as wd has been already destroyed and
+    // the other windows reenabled, the activation is going to return to the
+    // window which had had it before
+    data->winActive->Destroy();

 
 

-    // "no redraw" MDI frame
-    wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
-    wndclass.style         = styleNoRedraw;
+    // also delete the temporary data object itself
+    delete data;
+}

 
 

-    if ( !RegisterClass(&wndclass) )
+bool wxGUIAppTraits::DoMessageFromThreadWait()
+{
+    // we should return false only if the app should exit, i.e. only if
+    // Dispatch() determines that the main event loop should terminate
+    wxEventLoopBase * const evtLoop = wxEventLoop::GetActive();
+    if ( !evtLoop || !evtLoop->Pending() )

     {
     {

-        wxLogLastError("RegisterClass(no redraw MDI parent frame)");
-
-        return FALSE;
+        // no events means no quit event
+        return true;

     }
 
     }
 

-    // Register the MDI child frame window class.
-    wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
-    wndclass.lpszClassName = wxMDIChildFrameClassName;
-    wndclass.style         = styleNormal;
-
-    if ( !RegisterClass(&wndclass) )
-    {
-        wxLogLastError("RegisterClass(MDI child)");
+    return evtLoop->Dispatch();
+}

 
 

-        return FALSE;
-    }
+DWORD wxGUIAppTraits::WaitForThread(WXHANDLE hThread)
+{
+    // if we don't have a running event loop, we shouldn't wait for the
+    // messages as we never remove them from the message queue and so we enter
+    // an infinite loop as MsgWaitForMultipleObjects() keeps returning
+    // WAIT_OBJECT_0 + 1
+    if ( !wxEventLoop::GetActive() )
+        return DoSimpleWaitForThread(hThread);
+
+    return ::MsgWaitForMultipleObjects
+             (
+               1,                   // number of objects to wait for
+               (HANDLE *)&hThread,  // the objects
+               false,               // wait for any objects, not all
+               INFINITE,            // no timeout
+               QS_ALLINPUT |        // return as soon as there are any events
+               QS_ALLPOSTMESSAGE
+             );
+}

 
 

-    // "no redraw" MDI child frame
-    wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
-    wndclass.style         = styleNoRedraw;
+wxPortId wxGUIAppTraits::GetToolkitVersion(int *majVer, int *minVer) const
+{
+    OSVERSIONINFO info;
+    wxZeroMemory(info);

 
 

-    if ( !RegisterClass(&wndclass) )
+    // on Windows, the toolkit version is the same of the OS version
+    // as Windows integrates the OS kernel with the GUI toolkit.
+    info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+    if ( ::GetVersionEx(&info) )

     {
     {

-        wxLogLastError("RegisterClass(no redraw MDI child)");
-
-        return FALSE;
+        if ( majVer )
+            *majVer = info.dwMajorVersion;
+        if ( minVer )
+            *minVer = info.dwMinorVersion;

     }
 
     }
 

-    // Register the panel window class.
-    wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
-    wndclass.lpszClassName = wxPanelClassName;
-    wndclass.style         = styleNormal;
-
-    if ( !RegisterClass(&wndclass) )
-    {
-        wxLogLastError("RegisterClass(panel)");
-
-        return FALSE;
-    }
+#if defined(__WXHANDHELD__) || defined(__WXWINCE__)
+    return wxPORT_WINCE;
+#else
+    return wxPORT_MSW;
+#endif
+}

 
 

-    // Register the canvas and textsubwindow class name
-    wndclass.hbrBackground = (HBRUSH)NULL;
-    wndclass.lpszClassName = wxCanvasClassName;
+#if wxUSE_TIMER

 
 

-    if ( !RegisterClass(&wndclass) )
-    {
-        wxLogLastError("RegisterClass(canvas)");
+wxTimerImpl *wxGUIAppTraits::CreateTimerImpl(wxTimer *timer)
+{
+    return new wxMSWTimerImpl(timer);
+}

 
 

-        return FALSE;
-    }
+#endif // wxUSE_TIMER

 
 

-    return TRUE;
+wxEventLoopBase* wxGUIAppTraits::CreateEventLoop()
+{
+    return new wxEventLoop;

 }
 
 // ---------------------------------------------------------------------------
 }
 
 // ---------------------------------------------------------------------------

-// Convert Windows to argc, argv style
+// Stuff for using console from the GUI applications

 // ---------------------------------------------------------------------------
 
 // ---------------------------------------------------------------------------
 

-void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
-{
-    wxStringList args;
+#ifndef __WXWINCE__

 
 

-    wxString cmdLine(lpCmdLine);
-    int count = 0;
+#include <wx/dynlib.h>

 
 

-    // Get application name
-    wxChar name[260]; // 260 is MAX_PATH value from windef.h
-    ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
+namespace
+{

 
 

-    args.Add(name);
-    count++;
+/*
+    Helper class to manipulate console from a GUI app.

 
 

-    wxStrcpy(name, wxFileNameFromPath(name));
-    wxStripExtension(name);
-    wxTheApp->SetAppName(name);
+    Notice that console output is available in the GUI app only if:
+    - AttachConsole() returns TRUE (which means it never works under pre-XP)
+    - we have a valid STD_ERROR_HANDLE
+    - command history hasn't been changed since our startup

 
 

-    // Break up string
-    // Treat strings enclosed in double-quotes as single arguments
-    int i = 0;
-    int len = cmdLine.Length();
-    while (i < len)
+    To check if all these conditions are verified, you need to simple call
+    IsOkToUse(). It will check the first two conditions above the first time it
+    is called (and if this fails, the subsequent calls will return immediately)
+    and also recheck the last one every time it is called.
+ */
+class wxConsoleStderr
+{
+public:
+    // default ctor does nothing, call Init() before using this class
+    wxConsoleStderr()

     {
     {

-        // Skip whitespace
-        while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
-            i ++;
+        m_hStderr = INVALID_HANDLE_VALUE;
+        m_historyLen =
+        m_dataLen =
+        m_dataLine = 0;

 
 

-        if (i < len)
-        {
-            if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
-            {
-                i ++;
-                int first = i;
-                while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
-                    i ++;
-
-                wxString arg(cmdLine.Mid(first, (i - first)));
-
-                args.Add(arg);
-                count ++;
+        m_ok = -1;
+    }

 
 

-                if (i < len)
-                    i ++; // Skip past 2nd quote
-            }
-            else // Unquoted argument
+    ~wxConsoleStderr()
+    {
+        if ( m_hStderr != INVALID_HANDLE_VALUE )
+        {
+            if ( !::FreeConsole() )

             {
             {

-                int first = i;
-                while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
-                    i ++;
-
-                wxString arg(cmdLine.Mid(first, (i - first)));
-
-                args.Add(arg);
-                count ++;
+                wxLogLastError(_T("FreeConsole"));

             }
         }
     }
 
             }
         }
     }
 

-    wxTheApp->argv = new wxChar*[count + 1];
-    for (i = 0; i < count; i++)
+    // return true if we were successfully initialized and there had been no
+    // console activity which would interfere with our output since then
+    bool IsOkToUse() const

     {
     {

-        wxString arg(args[i]);
-        wxTheApp->argv[i] = copystring((const wxChar*)arg);
-    }
-    wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
-    wxTheApp->argc = count;
-}
+        if ( m_ok == -1 )
+        {
+            wxConsoleStderr * const self = const_cast<wxConsoleStderr *>(this);
+            self->m_ok = self->DoInit();

 
 

-//// Cleans up any wxWindows internal structures left lying around
+            // no need to call IsHistoryUnchanged() as we just initialized
+            // m_history anyhow
+            return m_ok == 1;
+        }

 
 

-void wxApp::CleanUp()
-{
-    //// COMMON CLEANUP
+        return m_ok && IsHistoryUnchanged();
+    }

 
 

-#if wxUSE_LOG
-    // flush the logged messages if any and install a 'safer' log target: the
-    // default one (wxLogGui) can't be used after the resources are freed just
-    // below and the user suppliedo ne might be even more unsafe (using any
-    // wxWindows GUI function is unsafe starting from now)
-    wxLog::DontCreateOnDemand();
-
-    // this will flush the old messages if any
-    delete wxLog::SetActiveTarget(new wxLogStderr);
-#endif // wxUSE_LOG

 
 

-    // One last chance for pending objects to be cleaned up
-    wxTheApp->DeletePendingObjects();
+    // output the provided text on the console, return true if ok
+    bool Write(const wxString& text);

 
 

-    wxModule::CleanUpModules();
+private:
+    // called by Init() once only to do the real initialization
+    bool DoInit();

 
 

-#if wxUSE_WX_RESOURCES
-    wxCleanUpResourceSystem();
+    // retrieve the command line history into the provided buffer and return
+    // its length
+    int GetCommandHistory(wxWxCharBuffer& buf) const;

 
 

-    //  wxDefaultResourceTable->ClearTable();
-#endif
+    // check if the console history has changed
+    bool IsHistoryUnchanged() const;

 
 

-    // Indicate that the cursor can be freed, so that cursor won't be deleted
-    // by deleting the bitmap list before g_globalCursor goes out of scope
-    // (double deletion of the cursor).
-    wxSetCursor(wxNullCursor);
-    delete g_globalCursor;
-    g_globalCursor = NULL;
+    int m_ok;                   // initially -1, set to true or false by Init()

 
 

-    wxDeleteStockObjects();
+    wxDynamicLibrary m_dllKernel32;

 
 

-    // Destroy all GDI lists, etc.
-    wxDeleteStockLists();
+    HANDLE m_hStderr;           // console handle, if it's valid we must call
+                                // FreeConsole() (even if m_ok != 1)

 
 

-    delete wxTheColourDatabase;
-    wxTheColourDatabase = NULL;
+    wxWxCharBuffer m_history;   // command history on startup
+    int m_historyLen;           // length command history buffer

 
 

-    wxBitmap::CleanUpHandlers();
+    wxCharBuffer m_data;        // data between empty line and cursor position
+    int m_dataLen;              // length data buffer
+    int m_dataLine;             // line offset

 
 

-    delete[] wxBuffer;
-    wxBuffer = NULL;
+    typedef DWORD (WINAPI *GetConsoleCommandHistory_t)(LPTSTR sCommands,
+                                                       DWORD nBufferLength,
+                                                       LPCTSTR sExeName);
+    typedef DWORD (WINAPI *GetConsoleCommandHistoryLength_t)(LPCTSTR sExeName);

 
 

-    //// WINDOWS-SPECIFIC CLEANUP
+    GetConsoleCommandHistory_t m_pfnGetConsoleCommandHistory;
+    GetConsoleCommandHistoryLength_t m_pfnGetConsoleCommandHistoryLength;

 
 

-    wxSetKeyboardHook(FALSE);
+    DECLARE_NO_COPY_CLASS(wxConsoleStderr)
+};

 
 

-#if wxUSE_RICHEDIT
-    if (gs_hRichEdit != (HINSTANCE) NULL)
-        FreeLibrary(gs_hRichEdit);
-#endif
+bool wxConsoleStderr::DoInit()
+{
+    HANDLE hStderr = ::GetStdHandle(STD_ERROR_HANDLE);

 
 

-#if wxUSE_PENWINDOWS
-    wxCleanUpPenWin();
-#endif
+    if ( hStderr == INVALID_HANDLE_VALUE || !hStderr )
+        return false;

 
 

-    if (wxSTD_FRAME_ICON)
-        DestroyIcon(wxSTD_FRAME_ICON);
-    if (wxSTD_MDICHILDFRAME_ICON)
-        DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
-    if (wxSTD_MDIPARENTFRAME_ICON)
-        DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
+    if ( !m_dllKernel32.Load(_T("kernel32.dll")) )
+        return false;

 
 

-    if (wxDEFAULT_FRAME_ICON)
-        DestroyIcon(wxDEFAULT_FRAME_ICON);
-    if (wxDEFAULT_MDICHILDFRAME_ICON)
-        DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
-    if (wxDEFAULT_MDIPARENTFRAME_ICON)
-        DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
+    typedef BOOL (WINAPI *AttachConsole_t)(DWORD dwProcessId);
+    AttachConsole_t wxDL_INIT_FUNC(pfn, AttachConsole, m_dllKernel32);

 
 

-    if ( wxDisableButtonBrush )
-        ::DeleteObject( wxDisableButtonBrush );
+    if ( !pfnAttachConsole || !pfnAttachConsole(ATTACH_PARENT_PROCESS) )
+        return false;

 
 

-#if wxUSE_OLE
-    ::OleUninitialize();
-#endif
+    // console attached, set m_hStderr now to ensure that we free it in the
+    // dtor
+    m_hStderr = hStderr;

 
 

-#if wxUSE_CTL3D
-    Ctl3dUnregister(wxhInstance);
-#endif
+    wxDL_INIT_FUNC_AW(m_pfn, GetConsoleCommandHistory, m_dllKernel32);
+    if ( !m_pfnGetConsoleCommandHistory )
+        return false;

 
 

-    if (wxWinHandleList)
-        delete wxWinHandleList;
+    wxDL_INIT_FUNC_AW(m_pfn, GetConsoleCommandHistoryLength, m_dllKernel32);
+    if ( !m_pfnGetConsoleCommandHistoryLength )
+        return false;

 
 

-    // GL: I'm annoyed ... I don't know where to put this and I don't want to
-    // create a module for that as it's part of the core.
-    delete wxPendingEvents;
-#if wxUSE_THREADS
-    delete wxPendingEventsLocker;
-    // If we don't do the following, we get an apparent memory leak.
-    ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
-#endif
+    // remember the current command history to be able to compare with it later
+    // in IsHistoryUnchanged()
+    m_historyLen = GetCommandHistory(m_history);
+    if ( !m_history )
+        return false;

 
 

-    wxClassInfo::CleanUpClasses();

 
 

-    delete wxTheApp;
-    wxTheApp = NULL;
+    // now find the first blank line above the current position
+    CONSOLE_SCREEN_BUFFER_INFO csbi;

 
 

-#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
-    // At this point we want to check if there are any memory
-    // blocks that aren't part of the wxDebugContext itself,
-    // as a special case. Then when dumping we need to ignore
-    // wxDebugContext, too.
-    if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
+    if ( !::GetConsoleScreenBufferInfo(m_hStderr, &csbi) )

     {
     {

-        wxLogDebug(wxT("There were memory leaks."));
-        wxDebugContext::Dump();
-        wxDebugContext::PrintStatistics();
+        wxLogLastError(_T("GetConsoleScreenBufferInfo"));
+        return false;

     }
     }

-    //  wxDebugContext::SetStream(NULL, NULL);
-#endif
-
-#if wxUSE_LOG
-    // do it as the very last thing because everything else can log messages
-    delete wxLog::SetActiveTarget(NULL);
-#endif // wxUSE_LOG
-}

 
 

-#if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
+    COORD pos;
+    pos.X = 0;
+    pos.Y = csbi.dwCursorPosition.Y + 1;

 
 

-// temporarily disable this warning which would be generated in release builds
-// because of __try
-#ifdef __VISUALC__
-    #pragma warning(disable: 4715) // not all control paths return a value
-#endif // Visual C++
-
-//// Main wxWindows entry point
-int wxEntry(WXHINSTANCE hInstance,
-            WXHINSTANCE WXUNUSED(hPrevInstance),
-            char *lpCmdLine,
-            int nCmdShow,
-            bool enterLoop)
-{
-    // do check for memory leaks on program exit
-    // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
-    //  deallocated memory which may be used to simulate low-memory condition)
-    wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
-#ifdef __MWERKS__
-#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
-    // This seems to be necessary since there are 'rogue'
-    // objects present at this point (perhaps global objects?)
-    // Setting a checkpoint will ignore them as far as the
-    // memory checking facility is concerned.
-    // Of course you may argue that memory allocated in globals should be
-    // checked, but this is a reasonable compromise.
-    wxDebugContext::SetCheckpoint();
-#endif
-#endif
-    // take everything into a try-except block in release build
-    // FIXME other compilers must support Win32 SEH (structured exception
-    //       handling) too, just find the appropriate keyword in their docs!
-    //       Please note that it's _not_ the same as C++ exceptions!
-#if !defined(__WXDEBUG__) && defined(__VISUALC__)
-    #define CATCH_PROGRAM_EXCEPTIONS
-
-    __try {
-#else
-    #undef  CATCH_PROGRAM_EXCEPTIONS
-#endif
-        wxhInstance = (HINSTANCE) hInstance;
+    // we decide that a line is empty if first 4 characters are spaces
+    DWORD ret;
+    char buf[4];
+    do
+    {
+        pos.Y--;
+        if ( !::ReadConsoleOutputCharacterA(m_hStderr, buf, WXSIZEOF(buf),
+                                            pos, &ret) )
+        {
+            wxLogLastError(_T("ReadConsoleOutputCharacterA"));
+            return false;
+        }
+    } while ( wxStrncmp("    ", buf, WXSIZEOF(buf)) != 0 );

 
 

-        if (!wxApp::Initialize())
-            return 0;
+    // calculate line offset and length of data
+    m_dataLine = csbi.dwCursorPosition.Y - pos.Y;
+    m_dataLen = m_dataLine*csbi.dwMaximumWindowSize.X + csbi.dwCursorPosition.X;

 
 

-        // create the application object or ensure that one already exists
-        if (!wxTheApp)
+    if ( m_dataLen > 0 )
+    {
+        m_data.extend(m_dataLen);
+        if ( !::ReadConsoleOutputCharacterA(m_hStderr, m_data.data(), m_dataLen,
+                                            pos, &ret) )

         {
         {

-            // The app may have declared a global application object, but we recommend
-            // the IMPLEMENT_APP macro is used instead, which sets an initializer
-            // function for delayed, dynamic app object construction.
-            wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
-                         wxT("No initializer - use IMPLEMENT_APP macro.") );
-
-            wxTheApp = (*wxApp::GetInitializerFunction()) ();
+            wxLogLastError(_T("ReadConsoleOutputCharacterA"));
+            return false;

         }
         }

+    }

 
 

-        wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
-
-        // save the WinMain() parameters
-        wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
-        wxTheApp->m_nCmdShow = nCmdShow;
+    return true;
+}

 
 

-        // GUI-specific initialisation. In fact on Windows we don't have any,
-        // but this call is provided for compatibility across platforms.
-        wxTheApp->OnInitGui();
+int wxConsoleStderr::GetCommandHistory(wxWxCharBuffer& buf) const
+{
+    // these functions are internal and may only be called by cmd.exe
+    static const wxChar *CMD_EXE = _T("cmd.exe");

 
 

-        // We really don't want timestamps by default, because it means
-        // we can't simply double-click on the error message and get to that
-        // line in the source. So VC++ at least, let's have a sensible default.
-#ifdef __VISUALC__
-        wxLog::SetTimestamp(NULL);
-#endif
+    const int len = m_pfnGetConsoleCommandHistoryLength(CMD_EXE);
+    if ( len )
+    {
+        buf.extend(len);

 
 

-        int retValue = 0;
+        int len2 = m_pfnGetConsoleCommandHistory(buf.data(), len, CMD_EXE);

 
 

-        if ( wxTheApp->OnInit() )
-        {
-            if ( enterLoop )
-            {
-                retValue = wxTheApp->OnRun();
-            }
-            else
-                // We want to initialize, but not run or exit immediately.
-                return 1;
-        }
-        //else: app initialization failed, so we skipped OnRun()
+#if !wxUSE_UNICODE
+        // there seems to be a bug in the GetConsoleCommandHistoryA(), it
+        // returns the length of Unicode string and not ANSI one
+        len2 /= 2;
+#endif // !wxUSE_UNICODE

 
 

-        wxWindow *topWindow = wxTheApp->GetTopWindow();
-        if ( topWindow )
+        if ( len2 != len )

         {
         {

-            // Forcibly delete the window.
-            if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
-                    topWindow->IsKindOf(CLASSINFO(wxDialog)) )
-            {
-                topWindow->Close(TRUE);
-                wxTheApp->DeletePendingObjects();
-            }
-            else
-            {
-                delete topWindow;
-                wxTheApp->SetTopWindow(NULL);
-            }
+            wxFAIL_MSG( _T("failed getting history?") );

         }
         }

-
-        wxTheApp->OnExit();
-
-        wxApp::CleanUp();
-
-        return retValue;
-
-#ifdef CATCH_PROGRAM_EXCEPTIONS

     }
     }

-    __except ( EXCEPTION_EXECUTE_HANDLER ) {
-        /*
-           if ( wxTheApp )
-           wxTheApp->OnFatalException();
-         */
-
-        // using wxLog would be unsafe here
-        ::MessageBox(NULL,
-                     _("Unrecoverable program error detected: "
-                     " the application will terminate."),
-                     _("Fatal Error"),
-                     MB_APPLMODAL | MB_ICONSTOP | MB_OK);
-
-        ::ExitProcess(3); // the same exit code as abort()
-
-        // NOTREACHED
-    }
-#endif // CATCH_PROGRAM_EXCEPTIONS
+
+    return len;

 }
 
 }
 

-// restore warning state
-#ifdef __VISUALC__
-    #pragma warning(default: 4715) // not all control paths return a value
-#endif // Visual C++
+bool wxConsoleStderr::IsHistoryUnchanged() const
+{
+    wxASSERT_MSG( m_ok == 1, _T("shouldn't be called if not initialized") );

 
 

-#else /*  _WINDLL  */
+    // get (possibly changed) command history
+    wxWxCharBuffer history;
+    const int historyLen = GetCommandHistory(history);

 
 

-//// Entry point for DLLs
+    // and compare it with the original one
+    return historyLen == m_historyLen && history &&
+                memcmp(m_history, history, historyLen) == 0;
+}

 
 

-int wxEntry(WXHINSTANCE hInstance)
+bool wxConsoleStderr::Write(const wxString& text)

 {
 {

-    wxhInstance = (HINSTANCE) hInstance;
-    wxApp::Initialize();
+    wxASSERT_MSG( m_hStderr != INVALID_HANDLE_VALUE,
+                    _T("should only be called if Init() returned true") );

 
 

-    // The app may have declared a global application object, but we recommend
-    // the IMPLEMENT_APP macro is used instead, which sets an initializer function
-    // for delayed, dynamic app object construction.
-    if (!wxTheApp)
+    // get current position
+    CONSOLE_SCREEN_BUFFER_INFO csbi;
+    if ( !::GetConsoleScreenBufferInfo(m_hStderr, &csbi) )

     {
     {

-        wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
-                     "No initializer - use IMPLEMENT_APP macro." );
-
-        wxTheApp = (* wxApp::GetInitializerFunction()) ();
+        wxLogLastError(_T("GetConsoleScreenBufferInfo"));
+        return false;

     }
 
     }
 

-    wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
+    // and calculate new position (where is empty line)
+    csbi.dwCursorPosition.X = 0;
+    csbi.dwCursorPosition.Y -= m_dataLine;

 
 

-    wxTheApp->argc = 0;
-    wxTheApp->argv = NULL;
-
-    wxTheApp->OnInitGui();
-
-    wxTheApp->OnInit();
+    if ( !::SetConsoleCursorPosition(m_hStderr, csbi.dwCursorPosition) )
+    {
+        wxLogLastError(_T("SetConsoleCursorPosition"));
+        return false;
+    }

 
 

-    wxWindow *topWindow = wxTheApp->GetTopWindow();
-    if ( topWindow && topWindow->GetHWND())
+    DWORD ret;
+    if ( !::FillConsoleOutputCharacter(m_hStderr, _T(' '), m_dataLen,
+                                       csbi.dwCursorPosition, &ret) )

     {
     {

-        topWindow->Show(TRUE);
+        wxLogLastError(_T("FillConsoleOutputCharacter"));
+        return false;

     }
 
     }
 

-    return 1;
-}
-#endif // _WINDLL
+    if ( !::WriteConsole(m_hStderr, text.wx_str(), text.length(), &ret, NULL) )
+    {
+        wxLogLastError(_T("WriteConsole"));
+        return false;
+    }

 
 

-//// Static member initialization
+    WriteConsoleA(m_hStderr, m_data, m_dataLen, &ret, 0);

 
 

-wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
+    return true;
+}

 
 

-wxApp::wxApp()
-{
-    m_topWindow = NULL;
-    wxTheApp = this;
-    m_wantDebugOutput = TRUE;
+wxConsoleStderr s_consoleStderr;

 
 

-    argc = 0;
-    argv = NULL;
-    m_printMode = wxPRINT_WINDOWS;
-    m_exitOnFrameDelete = TRUE;
-    m_auto3D = TRUE;
-}
+} // anonymous namespace

 
 

-wxApp::~wxApp()
+bool wxGUIAppTraits::CanUseStderr()

 {
 {

-    // Delete command-line args
-    int i;
-    for (i = 0; i < argc; i++)
-    {
-        delete[] argv[i];
-    }
-    delete[] argv;
+    return s_consoleStderr.IsOkToUse();

 }
 
 }
 

-bool wxApp::Initialized()
+bool wxGUIAppTraits::WriteToStderr(const wxString& text)

 {
 {

-#ifndef _WINDLL
-    if (GetTopWindow())
-        return TRUE;
-    else
-        return FALSE;
-#endif
-#ifdef _WINDLL // Assume initialized if DLL (no way of telling)
-    return TRUE;
-#endif
+    return s_consoleStderr.IsOkToUse() && s_consoleStderr.Write(text);

 }
 
 }
 

-/*
- * Get and process a message, returning FALSE if WM_QUIT
- * received (and also set the flag telling the app to exit the main loop)
- *
- */
-bool wxApp::DoMessage()
-{
-    BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
-    if ( rc == 0 )
-    {
-        // got WM_QUIT
-        m_keepGoing = FALSE;
+#endif // !__WXWINCE__

 
 

-        return FALSE;
-    }
-    else if ( rc == -1 )
-    {
-        // should never happen, but let's test for it nevertheless
-        wxLogLastError("GetMessage");
-    }
-    else
-    {
-#if wxUSE_THREADS
-        wxASSERT_MSG( wxThread::IsMain(),
-                      wxT("only the main thread can process Windows messages") );
-
-        static bool s_hadGuiLock = TRUE;
-        static wxMsgArray s_aSavedMessages;
-
-        // if a secondary thread owns is doing GUI calls, save all messages for
-        // later processing - we can't process them right now because it will
-        // lead to recursive library calls (and we're not reentrant)
-        if ( !wxGuiOwnedByMainThread() )
-        {
-            s_hadGuiLock = FALSE;
+// ===========================================================================
+// wxApp implementation
+// ===========================================================================

 
 

-            // leave out WM_COMMAND messages: too dangerous, sometimes
-            // the message will be processed twice
-            if ( !wxIsWaitingForThread() ||
-                    s_currentMsg.message != WM_COMMAND )
-            {
-                s_aSavedMessages.Add(s_currentMsg);
-            }
+int wxApp::m_nCmdShow = SW_SHOWNORMAL;

 
 

-            return TRUE;
-        }
-        else
-        {
-            // have we just regained the GUI lock? if so, post all of the saved
-            // messages
-            //
-            // FIXME of course, it's not _exactly_ the same as processing the
-            //       messages normally - expect some things to break...
-            if ( !s_hadGuiLock )
-            {
-                s_hadGuiLock = TRUE;
+// ---------------------------------------------------------------------------
+// wxWin macros
+// ---------------------------------------------------------------------------

 
 

-                size_t count = s_aSavedMessages.Count();
-                for ( size_t n = 0; n < count; n++ )
-                {
-                    MSG& msg = s_aSavedMessages[n];
+IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)

 
 

-                    if ( !ProcessMessage((WXMSG *)&msg) )
-                    {
-                        ::TranslateMessage(&msg);
-                        ::DispatchMessage(&msg);
-                    }
-                }
+BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
+    EVT_IDLE(wxApp::OnIdle)
+    EVT_END_SESSION(wxApp::OnEndSession)
+    EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
+END_EVENT_TABLE()

 
 

-                s_aSavedMessages.Empty();
-            }
-        }
-#endif // wxUSE_THREADS
+// class to ensure that wxAppBase::CleanUp() is called if our Initialize()
+// fails
+class wxCallBaseCleanup
+{
+public:
+    wxCallBaseCleanup(wxApp *app) : m_app(app) { }
+    ~wxCallBaseCleanup() { if ( m_app ) m_app->wxAppBase::CleanUp(); }

 
 

-        // Process the message
-        if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
-        {
-            ::TranslateMessage(&s_currentMsg);
-            ::DispatchMessage(&s_currentMsg);
-        }
-    }
+    void Dismiss() { m_app = NULL; }

 
 

-    return TRUE;
-}
+private:
+    wxApp *m_app;
+};

 
 

-/*
- * Keep trying to process messages until WM_QUIT
- * received.
- *
- * If there are messages to be processed, they will all be
- * processed and OnIdle will not be called.
- * When there are no more messages, OnIdle is called.
- * If OnIdle requests more time,
- * it will be repeatedly called so long as there are no pending messages.
- * A 'feature' of this is that once OnIdle has decided that no more processing
- * is required, then it won't get processing time until further messages
- * are processed (it'll sit in DoMessage).
- */
-
-int wxApp::MainLoop()
+//// Initialize
+bool wxApp::Initialize(int& argc, wxChar **argv)

 {
 {

-    m_keepGoing = TRUE;
+    if ( !wxAppBase::Initialize(argc, argv) )
+        return false;

 
 

-    while ( m_keepGoing )
-    {
-#if wxUSE_THREADS
-        wxMutexGuiLeaveOrEnter();
-#endif // wxUSE_THREADS
+    // ensure that base cleanup is done if we return too early
+    wxCallBaseCleanup callBaseCleanup(this);

 
 

-        while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
-                ProcessIdle() )
-        {
-        }
-
-
-        DoMessage();
-    }
+#if !defined(__WXMICROWIN__)
+    InitCommonControls();
+#endif // !defined(__WXMICROWIN__)

 
 

-    return s_currentMsg.wParam;
-}
+#if defined(__SMARTPHONE__) || defined(__POCKETPC__)
+    SHInitExtraControls();
+#endif

 
 

-// Returns TRUE if more time is needed.
-bool wxApp::ProcessIdle()
-{
-    wxIdleEvent event;
-    event.SetEventObject(this);
-    ProcessEvent(event);
+#ifndef __WXWINCE__
+    // Don't show a message box if a function such as SHGetFileInfo
+    // fails to find a device.
+    SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOOPENFILEERRORBOX);
+#endif

 
 

-    return event.MoreRequested();
-}
+    wxOleInitialize();

 
 

-void wxApp::ExitMainLoop()
-{
-    m_keepGoing = FALSE;
-}
+#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
+    wxSetKeyboardHook(true);
+#endif

 
 

-bool wxApp::Pending()
-{
-    return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
-}
+    callBaseCleanup.Dismiss();

 
 

-void wxApp::Dispatch()
-{
-    DoMessage();
+    return true;

 }
 
 }
 

-/*
- * Give all windows a chance to preprocess
- * the message. Some may have accelerator tables, or have
- * MDI complications.
- */
+// ---------------------------------------------------------------------------
+// Win32 window class registration
+// ---------------------------------------------------------------------------

 
 

-bool wxApp::ProcessMessage(WXMSG *wxmsg)
+/* static */
+const wxChar *wxApp::GetRegisteredClassName(const wxChar *name,
+                                            int bgBrushCol,
+                                            int extraStyles)

 {
 {

-    MSG *msg = (MSG *)wxmsg;
-    HWND hWnd = msg->hwnd;
-    wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
-
-    // for some composite controls (like a combobox), wndThis might be NULL
-    // because the subcontrol is not a wxWindow, but only the control itself
-    // is - try to catch this case
-    while ( hWnd && !wndThis )
+    const size_t count = gs_regClassesInfo.size();
+    for ( size_t n = 0; n < count; n++ )

     {
     {

-        hWnd = ::GetParent(hWnd);
-        wndThis = wxFindWinFromHandle((WXHWND)hWnd);
+        if ( gs_regClassesInfo[n].basename == name )
+            return gs_regClassesInfo[n].regname.c_str();

     }
 
     }
 

-    // Try translations first; find the youngest window with
-    // a translation table.
-    for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
+    // we need to register this class
+    WNDCLASS wndclass;
+    wxZeroMemory(wndclass);
+
+    wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
+    wndclass.hInstance     = wxhInstance;
+    wndclass.hCursor       = ::LoadCursor(NULL, IDC_ARROW);
+    wndclass.hbrBackground = (HBRUSH)wxUIntToPtr(bgBrushCol + 1);
+    wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | extraStyles;
+
+
+    ClassRegInfo regClass;
+    regClass.basename = name;
+
+    // constuct a unique suffix to allow registering the class with the same
+    // base name in a main application using wxWidgets and a DLL using
+    // wxWidgets loaded into its address space: as gs_regClassesInfo variable
+    // is different in them, we're going to obtain a unique prefix by using its
+    // address here
+    regClass.regname = regClass.basename +
+                            wxString::Format(wxT("@%p"), &gs_regClassesInfo);
+    wndclass.lpszClassName = regClass.regname.wx_str();
+    if ( !::RegisterClass(&wndclass) )

     {
     {

-        if ( wnd->MSWTranslateMessage(wxmsg) )
-            return TRUE;
+        wxLogLastError(wxString::Format(wxT("RegisterClass(%s)"),
+                       regClass.regname));
+        return NULL;

     }
 
     }
 

-    // Anyone for a non-translation message? Try youngest descendants first.
-    for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
+    // NB: remember that code elsewhere supposes that no redraw class names
+    //     use the same names as normal classes with "NR" suffix so we must put
+    //     "NR" at the end instead of using more natural basename+"NR"+suffix
+    regClass.regnameNR = regClass.regname + GetNoRedrawClassSuffix();
+    wndclass.style &= ~(CS_HREDRAW | CS_VREDRAW);
+    wndclass.lpszClassName = regClass.regnameNR.wx_str();
+    if ( !::RegisterClass(&wndclass) )

     {
     {

-        if ( wnd->MSWProcessMessage(wxmsg) )
-            return TRUE;
+        wxLogLastError(wxString::Format(wxT("RegisterClass(%s)"),
+                       regClass.regname));
+        ::UnregisterClass(regClass.regname.c_str(), wxhInstance);
+        return NULL;

     }
 
     }
 

-    return FALSE;
+    gs_regClassesInfo.push_back(regClass);
+
+    // take care to return the pointer which will remain valid after the
+    // function returns (it could be invalidated later if new elements are
+    // added to the vector and it's reallocated but this shouldn't matter as
+    // this pointer should be used right now, not stored)
+    return gs_regClassesInfo.back().regname.wx_str();

 }
 
 }
 

-void wxApp::OnIdle(wxIdleEvent& event)
+bool wxApp::IsRegisteredClassName(const wxString& name)

 {
 {

-    static bool s_inOnIdle = FALSE;
-
-    // Avoid recursion (via ProcessEvent default case)
-    if ( s_inOnIdle )
-        return;
-
-    s_inOnIdle = TRUE;
-
-    // 'Garbage' collection of windows deleted with Close().
-    DeletePendingObjects();
-
-#if wxUSE_LOG
-    // flush the logged messages if any
-    wxLog *pLog = wxLog::GetActiveTarget();
-    if ( pLog != NULL && pLog->HasPendingMessages() )
-        pLog->Flush();
-#endif // wxUSE_LOG
-
-    // Send OnIdle events to all windows
-    if ( SendIdleEvents() )
+    const size_t count = gs_regClassesInfo.size();
+    for ( size_t n = 0; n < count; n++ )

     {
     {

-        // SendIdleEvents() returns TRUE if at least one window requested more
-        // idle events
-        event.RequestMore(TRUE);
+        if ( gs_regClassesInfo[n].regname == name ||
+                gs_regClassesInfo[n].regnameNR == name )
+            return true;

     }
 
     }
 

-    // If they are pending events, we must process them: pending events are
-    // either events to the threads other than main or events posted with
-    // wxPostEvent() functions
-    ProcessPendingEvents();
-
-    s_inOnIdle = FALSE;
+    return false;

 }
 
 }
 

-// Send idle event to all top-level windows
-bool wxApp::SendIdleEvents()
+void wxApp::UnregisterWindowClasses()

 {
 {

-    bool needMore = FALSE;
-
-    wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
-    while (node)
+    const size_t count = gs_regClassesInfo.size();
+    for ( size_t n = 0; n < count; n++ )

     {
     {

-        wxWindow* win = node->GetData();
-        if (SendIdleEvents(win))
-            needMore = TRUE;
-        node = node->GetNext();
+        const ClassRegInfo& regClass = gs_regClassesInfo[n];
+        if ( !::UnregisterClass(regClass.regname.c_str(), wxhInstance) )
+        {
+            wxLogLastError(wxString::Format(wxT("UnregisterClass(%s)"),
+                           regClass.regname));
+        }
+
+        if ( !::UnregisterClass(regClass.regnameNR.c_str(), wxhInstance) )
+        {
+            wxLogLastError(wxString::Format(wxT("UnregisterClass(%s)"),
+                           regClass.regnameNR));
+        }

     }
 
     }
 

-    return needMore;
+    gs_regClassesInfo.clear();

 }
 
 }
 

-// Send idle event to window and all subwindows
-bool wxApp::SendIdleEvents(wxWindow* win)
+void wxApp::CleanUp()

 {
 {

-    bool needMore = FALSE;
+    // all objects pending for deletion must be deleted first, otherwise
+    // UnregisterWindowClasses() call wouldn't succeed (because windows
+    // using the classes being unregistered still exist), so call the base
+    // class method first and only then do our clean up
+    wxAppBase::CleanUp();
+
+#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
+    wxSetKeyboardHook(false);
+#endif

 
 

-    wxIdleEvent event;
-    event.SetEventObject(win);
-    win->GetEventHandler()->ProcessEvent(event);
+    wxOleUninitialize();

 
 

-    if (event.MoreRequested())
-        needMore = TRUE;
+    // for an EXE the classes are unregistered when it terminates but DLL may
+    // be loaded several times (load/unload/load) into the same process in
+    // which case the registration will fail after the first time if we don't
+    // unregister the classes now
+    UnregisterWindowClasses();
+}

 
 

-    wxNode* node = win->GetChildren().First();
-    while (node)
-    {
-        wxWindow* win = (wxWindow*) node->Data();
-        if (SendIdleEvents(win))
-            needMore = TRUE;
+// ----------------------------------------------------------------------------
+// wxApp ctor/dtor
+// ----------------------------------------------------------------------------

 
 

-        node = node->Next();
-    }
-    return needMore;
+wxApp::wxApp()
+{
+    m_printMode = wxPRINT_WINDOWS;

 }
 
 }
 

-void wxApp::DeletePendingObjects()
+wxApp::~wxApp()

 {
 {

-    wxNode *node = wxPendingDelete.First();
-    while (node)
-    {
-        wxObject *obj = (wxObject *)node->Data();
+}

 
 

-        delete obj;
+// ----------------------------------------------------------------------------
+// wxApp idle handling
+// ----------------------------------------------------------------------------

 
 

-        if (wxPendingDelete.Member(obj))
-            delete node;
+void wxApp::OnIdle(wxIdleEvent& WXUNUSED(event))
+{
+#if wxUSE_DC_CACHEING
+    // automated DC cache management: clear the cached DCs and bitmap
+    // if it's likely that the app has finished with them, that is, we
+    // get an idle event and we're not dragging anything.
+    if (!::GetKeyState(MK_LBUTTON) && !::GetKeyState(MK_MBUTTON) && !::GetKeyState(MK_RBUTTON))
+        wxMSWDCImpl::ClearCache();
+#endif // wxUSE_DC_CACHEING
+}

 
 

-        // Deleting one object may have deleted other pending
-        // objects, so start from beginning of list again.
-        node = wxPendingDelete.First();
+void wxApp::WakeUpIdle()
+{
+    // Send the top window a dummy message so idle handler processing will
+    // start up again.  Doing it this way ensures that the idle handler
+    // wakes up in the right thread (see also wxWakeUpMainThread() which does
+    // the same for the main app thread only)
+    wxWindow * const topWindow = wxTheApp->GetTopWindow();
+    if ( topWindow )
+    {
+        HWND hwndTop = GetHwndOf(topWindow);
+
+        // Do not post WM_NULL if there's already a pending WM_NULL to avoid
+        // overflowing the message queue.
+        //
+        // Notice that due to a limitation of PeekMessage() API (which handles
+        // 0,0 range specially), we have to check the range from 0-1 instead.
+        // This still makes it possible to overflow the queue with WM_NULLs by
+        // interspersing the calles to WakeUpIdle() with windows creation but
+        // it should be rather hard to do it accidentally.
+        MSG msg;
+        if ( !::PeekMessage(&msg, hwndTop, 0, 1, PM_NOREMOVE) ||
+              ::PeekMessage(&msg, hwndTop, 1, 1, PM_NOREMOVE) )
+        {
+            if ( !::PostMessage(hwndTop, WM_NULL, 0, 0) )
+            {
+                // should never happen
+                wxLogLastError(wxT("PostMessage(WM_NULL)"));
+            }
+        }

     }
 }
 
     }
 }
 

+// ----------------------------------------------------------------------------
+// other wxApp event hanlders
+// ----------------------------------------------------------------------------
+

 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
 {
 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
 {

-    if (GetTopWindow())
-        GetTopWindow()->Close(TRUE);
+    // Windows will terminate the process soon after we return from
+    // WM_ENDSESSION handler or when we delete our last window, so make sure we
+    // at least execute our cleanup code before
+
+    // prevent the window from being destroyed when the corresponding wxTLW is
+    // destroyed: this will result in a leak of a HWND, of course, but who
+    // cares when the process is being killed anyhow
+    if ( !wxTopLevelWindows.empty() )
+        wxTopLevelWindows[0]->SetHWND(0);
+
+    const int rc = OnExit();
+
+    wxEntryCleanup();
+
+    // calling exit() instead of ExitProcess() or not doing anything at all and
+    // being killed by Windows has the advantage of executing the dtors of
+    // global objects
+    exit(rc);

 }
 
 // Default behaviour: close the application with prompts. The
 }
 
 // Default behaviour: close the application with prompts. The


@@ -1111,218 +860,246 @@ void wxApp::OnQueryEndSession(wxCloseEvent& event)
     if (GetTopWindow())
     {
         if (!GetTopWindow()->Close(!event.CanVeto()))
     if (GetTopWindow())
     {
         if (!GetTopWindow()->Close(!event.CanVeto()))

-            event.Veto(TRUE);
+            event.Veto(true);

     }
 }
 
     }
 }
 

-#if wxUSE_RICHEDIT
+// ----------------------------------------------------------------------------
+// system DLL versions
+// ----------------------------------------------------------------------------

 
 

-/* static */
-bool wxApp::InitRichEdit(int version)
-{
-    wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
-                 _T("incorrect richedit control version requested") );
+// these functions have trivial inline implementations for CE
+#ifndef __WXWINCE__

 
 

-    if ( version <= gs_verRichEdit )
-    {
-        // we've already got this or better
-        return TRUE;
-    }
+#if wxUSE_DYNLIB_CLASS

 
 

-    if ( gs_hRichEdit )
-    {
-        ::FreeLibrary(gs_hRichEdit);
-    }
+namespace
+{

 
 

-    // always try load riched20.dll first - like this we won't have to reload
-    // it later if we're first asked for RE 1 and then for RE 2 or 3
-    wxString dllname = _T("riched20.dll");
-    gs_hRichEdit = ::LoadLibrary(dllname);
-    if ( !gs_hRichEdit && (version == 1) )
-    {
-        // fall back to RE 1
-        dllname = _T("riched32.dll");
-        gs_hRichEdit = ::LoadLibrary(dllname);
-    }
+// helper function: retrieve the DLL version by using DllGetVersion(), returns
+// 0 if the DLL doesn't export such function
+int CallDllGetVersion(wxDynamicLibrary& dll)
+{
+    // now check if the function is available during run-time
+    wxDYNLIB_FUNCTION( DLLGETVERSIONPROC, DllGetVersion, dll );
+    if ( !pfnDllGetVersion )
+        return 0;

 
 

-    if ( !gs_hRichEdit )
-    {
-        wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
+    DLLVERSIONINFO dvi;
+    dvi.cbSize = sizeof(dvi);

 
 

-        gs_verRichEdit = -1;
+    HRESULT hr = (*pfnDllGetVersion)(&dvi);
+    if ( FAILED(hr) )
+    {
+        wxLogApiError(_T("DllGetVersion"), hr);

 
 

-        return FALSE;
+        return 0;

     }
 
     }
 

-    gs_verRichEdit = version;
-
-    return TRUE;
+    return 100*dvi.dwMajorVersion + dvi.dwMinorVersion;

 }
 
 }
 

-#endif // wxUSE_RICHEDIT
+} // anonymous namespace

 
 /* static */
 int wxApp::GetComCtl32Version()
 {
     // cache the result
 
 /* static */
 int wxApp::GetComCtl32Version()
 {
     // cache the result

+    //
+    // NB: this is MT-ok as in the worst case we'd compute s_verComCtl32 twice,
+    //     but as its value should be the same both times it doesn't matter

     static int s_verComCtl32 = -1;
 
     static int s_verComCtl32 = -1;
 

-    wxCRIT_SECT_DECLARE(csComCtl32);
-    wxCRIT_SECT_LOCKER(lock, csComCtl32);
-

     if ( s_verComCtl32 == -1 )
     {
     if ( s_verComCtl32 == -1 )
     {

-        // initally assume no comctl32.dll at all
-        s_verComCtl32 = 0;
+        // we're prepared to handle the errors
+        wxLogNull noLog;
+
+        // we don't want to load comctl32.dll, it should be already loaded but,
+        // depending on the OS version and the presence of the manifest, it can
+        // be either v5 or v6 and instead of trying to guess it just get the
+        // handle of the already loaded version
+        wxLoadedDLL dllComCtl32(_T("comctl32.dll"));
+        if ( !dllComCtl32.IsLoaded() )
+        {
+            s_verComCtl32 = 0;
+            return 0;
+        }

 
 

-        // do we have it?
-        HMODULE hModuleComCtl32 = ::GetModuleHandle(wxT("COMCTL32"));
+        // try DllGetVersion() for recent DLLs
+        s_verComCtl32 = CallDllGetVersion(dllComCtl32);

 
 

-        // if so, then we can check for the version
-        if ( hModuleComCtl32 )
+        // if DllGetVersion() is unavailable either during compile or
+        // run-time, try to guess the version otherwise
+        if ( !s_verComCtl32 )

         {
         {

-            // try to use DllGetVersion() if available in _headers_
-            #ifdef DLLVER_PLATFORM_WINDOWS // defined in shlwapi.h
-                DLLGETVERSIONPROC pfnDllGetVersion = (DLLGETVERSIONPROC)
-                    ::GetProcAddress(hModuleComCtl32, _T("DllGetVersion"));
-                if ( pfnDllGetVersion )
+            // InitCommonControlsEx is unique to 4.70 and later
+            void *pfn = dllComCtl32.GetSymbol(_T("InitCommonControlsEx"));
+            if ( !pfn )
+            {
+                // not found, must be 4.00
+                s_verComCtl32 = 400;
+            }
+            else // 4.70+
+            {
+                // many symbols appeared in comctl32 4.71, could use any of
+                // them except may be DllInstall()
+                pfn = dllComCtl32.GetSymbol(_T("InitializeFlatSB"));
+                if ( !pfn )

                 {
                 {

-                    DLLVERSIONINFO dvi;
-                    dvi.cbSize = sizeof(dvi);
-
-                    HRESULT hr = (*pfnDllGetVersion)(&dvi);
-                    if ( FAILED(hr) )
-                    {
-                        wxLogApiError(_T("DllGetVersion"), hr);
-                    }
-                    else
-                    {
-                        // this is incompatible with _WIN32_IE values, but
-                        // compatible with the other values returned by
-                        // GetComCtl32Version()
-                        s_verComCtl32 = 100*dvi.dwMajorVersion +
-                                            dvi.dwMinorVersion;
-                    }
+                    // not found, must be 4.70
+                    s_verComCtl32 = 470;

                 }
                 }

-            #endif
-                // DllGetVersion() unavailable either during compile or
-                // run-time, try to guess the version otherwise
-                if ( !s_verComCtl32 )
+                else

                 {
                 {

-                    // InitCommonControlsEx is unique to 4.70 and later
-                    FARPROC theProc = ::GetProcAddress
-                                        (
-                                         hModuleComCtl32,
-                                         _T("InitCommonControlsEx")
-                                        );
-
-                    if ( !theProc )
-                    {
-                        // not found, must be 4.00
-                        s_verComCtl32 = 400;
-                    }
-                    else
-                    {
-                        // many symbols appeared in comctl32 4.71, could use
-                        // any of them except may be DllInstall
-                        theProc = ::GetProcAddress
-                                    (
-                                     hModuleComCtl32,
-                                     _T("InitializeFlatSB")
-                                    );
-                        if ( !theProc )
-                        {
-                            // not found, must be 4.70
-                            s_verComCtl32 = 470;
-                        }
-                        else
-                        {
-                            // found, must be 4.71
-                            s_verComCtl32 = 471;
-                        }
-                    }
+                    // found, must be 4.71 or later
+                    s_verComCtl32 = 471;

                 }
                 }

+            }

         }
     }
 
     return s_verComCtl32;
 }
 
         }
     }
 
     return s_verComCtl32;
 }
 

-void wxExit()
+/* static */
+int wxApp::GetShell32Version()

 {
 {

-    wxLogError(_("Fatal error: exiting"));
+    static int s_verShell32 = -1;
+    if ( s_verShell32 == -1 )
+    {
+        // we're prepared to handle the errors
+        wxLogNull noLog;
+
+        wxDynamicLibrary dllShell32(_T("shell32.dll"), wxDL_VERBATIM);
+        if ( dllShell32.IsLoaded() )
+        {
+            s_verShell32 = CallDllGetVersion(dllShell32);
+
+            if ( !s_verShell32 )
+            {
+                // there doesn't seem to be any way to distinguish between 4.00
+                // and 4.70 (starting from 4.71 we have DllGetVersion()) so
+                // just assume it is 4.0
+                s_verShell32 = 400;
+            }
+        }
+        else // failed load the DLL?
+        {
+            s_verShell32 = 0;
+        }
+    }

 
 

-    wxApp::CleanUp();
+    return s_verShell32;

 }
 
 }
 

+#else // !wxUSE_DYNLIB_CLASS
+
+/* static */
+int wxApp::GetComCtl32Version()
+{
+    return 0;
+}
+
+/* static */
+int wxApp::GetShell32Version()
+{
+    return 0;
+}
+
+#endif // wxUSE_DYNLIB_CLASS/!wxUSE_DYNLIB_CLASS
+
+#endif // !__WXWINCE__
+
+// ----------------------------------------------------------------------------

 // Yield to incoming messages
 // Yield to incoming messages

-bool wxYield()
+// ----------------------------------------------------------------------------
+
+bool wxApp::Yield(bool onlyIfNeeded)

 {
 {

+    if ( m_isInsideYield )
+    {
+        if ( !onlyIfNeeded )
+        {
+            wxFAIL_MSG( wxT("wxYield called recursively" ) );
+        }
+
+        return false;
+    }
+
+    // set the flag and don't forget to reset it before returning
+    m_isInsideYield = true;
+    wxON_BLOCK_EXIT_SET(m_isInsideYield, false);
+
+
+#if wxUSE_LOG
+    // disable log flushing from here because a call to wxYield() shouldn't
+    // normally result in message boxes popping up &c
+    wxLog::Suspend();
+
+    // ensure the logs will be flashed again when we exit
+    wxON_BLOCK_EXIT0(wxLog::Resume);
+#endif // wxUSE_LOG
+
+

     // we don't want to process WM_QUIT from here - it should be processed in
     // the main event loop in order to stop it
     // we don't want to process WM_QUIT from here - it should be processed in
     // the main event loop in order to stop it

-
+    wxEventLoopGuarantor dummyLoopIfNeeded;

     MSG msg;
     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
             msg.message != WM_QUIT )
     {
     MSG msg;
     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
             msg.message != WM_QUIT )
     {

-        if ( !wxTheApp->DoMessage() )
+#if wxUSE_THREADS
+        wxMutexGuiLeaveOrEnter();
+#endif // wxUSE_THREADS
+
+        if ( !wxTheApp->Dispatch() )

             break;
     }
 
             break;
     }
 

-    // If they are pending events, we must process them.
-    wxTheApp->ProcessPendingEvents();
+    // if there are pending events, we must process them.
+    ProcessPendingEvents();

 
 

-    return TRUE;
+    return true;

 }
 
 }
 

-//-----------------------------------------------------------------------------
-// wxWakeUpIdle
-//-----------------------------------------------------------------------------
+#if wxUSE_EXCEPTIONS

 
 

-void wxWakeUpIdle()
-{
-    // Send the top window a dummy message so idle handler processing will
-    // start up again.  Doing it this way ensures that the idle handler
-    // wakes up in the right thread (see also wxWakeUpMainThread() which does
-    // the same for the main app thread only)
-    wxWindow *topWindow = wxTheApp->GetTopWindow();
-    if ( topWindow )
-    {
-        if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
-        {
-            // should never happen
-            wxLogLastError("PostMessage(WM_NULL)");
-        }
-    }
-}
-
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// exception handling
+// ----------------------------------------------------------------------------

 
 

-wxIcon
-wxApp::GetStdIcon(int which) const
+bool wxApp::OnExceptionInMainLoop()

 {
 {

-    switch(which)
+    // ask the user about what to do: use the Win32 API function here as it
+    // could be dangerous to use any wxWidgets code in this state
+    switch (
+            ::MessageBox
+              (
+                NULL,
+                _T("An unhandled exception occurred. Press \"Abort\" to \
+terminate the program,\r\n\
+\"Retry\" to exit the program normally and \"Ignore\" to try to continue."),
+                _T("Unhandled exception"),
+                MB_ABORTRETRYIGNORE |
+                MB_ICONERROR|
+                MB_TASKMODAL
+              )
+           )

     {
     {

-        case wxICON_INFORMATION:
-            return wxIcon("wxICON_INFO");
-
-        case wxICON_QUESTION:
-            return wxIcon("wxICON_QUESTION");
-
-        case wxICON_EXCLAMATION:
-            return wxIcon("wxICON_WARNING");
+        case IDABORT:
+            throw;

 
         default:
 
         default:

-            wxFAIL_MSG(wxT("requested non existent standard icon"));
-            // still fall through
+            wxFAIL_MSG( _T("unexpected MessageBox() return code") );
+            // fall through
+
+        case IDRETRY:
+            return false;

 
 

-        case wxICON_HAND:
-            return wxIcon("wxICON_ERROR");
+        case IDIGNORE:
+            return true;

     }
 }
 
     }
 }
 

-// For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
-// if in a separate file. So include it here to ensure it's linked.
-#if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
-#include "main.cpp"
-#endif
+#endif // wxUSE_EXCEPTIONS