]> git.saurik.com Git - wxWidgets.git/blobdiff - src/gtk/app.cpp
Corrected some things in, and some thing revealed by
[wxWidgets.git] / src / gtk / app.cpp
index dec83867a09766dfb70044a0bd1c1faffbc6e1cb..7bc83fdbd7deb4b3816b14b56c81aeed255db09e 100644 (file)
@@ -8,7 +8,7 @@
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__
-#pragma implementation "app.h"
+    #pragma implementation "app.h"
 #endif
 
 #include "wx/app.h"
 #include "wx/memory.h"
 #include "wx/font.h"
 #include "wx/settings.h"
+#include "wx/dialog.h"
+
 #if wxUSE_WX_RESOURCES
-#include "wx/resource.h"
+    #include "wx/resource.h"
 #endif
+
 #include "wx/module.h"
 #include "wx/image.h"
+
 #if wxUSE_THREADS
 #include "wx/thread.h"
 #endif
-#include "unistd.h"
 
-#include "glib.h"
-#include "gdk/gdk.h"
-#include "gtk/gtk.h"
+#include <unistd.h>
+
+#include <glib.h>
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
 #include "wx/gtk/win_gtk.h"
 
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 
 wxApp *wxTheApp = (wxApp *)  NULL;
-wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
-
-extern wxList wxPendingDelete;
-extern wxResourceCache *wxTheResourceCache;
+wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 
-GdkVisual *wxVisualSetByExternal = (GdkVisual*) NULL;
-GdkColormap *wxColormapSetByExternal = (GdkColormap*) NULL;
-
-unsigned char g_palette[64*3] =
-{
-  0x0,  0x0,  0x0,
-  0xff, 0xff, 0xff,
-  0xff, 0x0,  0x0,
-  0xff, 0xff, 0x0,
-  0x0,  0xff, 0x0,
-  0x0,  0x0,  0xff,
-  0x0,  0xff, 0xff,
-  0x99, 0x99, 0x99,
-  0xff, 0x88, 0x0,
-  0x88, 0x0,  0x0,
-  0x0,  0x88, 0x88,
-  0x88, 0x88, 0x0,
-  0xff, 0xcc, 0x97,
-  0xbb, 0xbb, 0xbb,
-  0x9f, 0x6b, 0x42,
-  0x55, 0x55, 0x55,
-  0xdd, 0xdd, 0xdd,
-  0x77, 0x77, 0x77,
-  0x33, 0x33, 0x33,
-  0xcc, 0x0,  0x0,
-  0xff, 0x44, 0x0,
-  0xff, 0xcc, 0x0,
-  0xcc, 0xcc, 0x0,
-  0x60, 0x60, 0x0,
-  0x0,  0x43, 0x0,
-  0x0,  0x7f, 0x0,
-  0x0,  0xcc, 0x0,
-  0x0,  0x44, 0x44,
-  0x0,  0x0,  0x44,
-  0x0,  0x0,  0x88,
-  0xef, 0xb1, 0x7b,
-  0xdf, 0x98, 0x5f,
-  0xbf, 0x87, 0x56,
-  0x7f, 0x57, 0x26,
-  0x5f, 0x39, 0xc,
-  0x3f, 0x1c, 0x0,
-  0x21, 0x0,  0x0,
-  0x0,  0x43, 0x87,
-  0x2d, 0x70, 0xaf,
-  0x5a, 0x9e, 0xd7,
-  0x87, 0xcc, 0xff,
-  0xff, 0xe0, 0xba,
-  0x21, 0x43, 0xf,
-  0x3d, 0x5d, 0x25,
-  0x59, 0x78, 0x3a,
-  0x75, 0x93, 0x4f,
-  0x91, 0xae, 0x64,
-  0xad, 0xc8, 0x7a,
-  0xf0, 0xa8, 0xef,
-  0xd0, 0x88, 0xd0,
-  0xaf, 0x66, 0xaf,
-  0x8e, 0x44, 0x8e,
-  0x6d, 0x22, 0x6d,
-  0x4b, 0x0,  0x4b,
-  0xff, 0xc0, 0xbc,
-  0xff, 0x93, 0x91,
-  0xff, 0x66, 0x67,
-  0xd8, 0xf2, 0xbf,
-  0xff, 0xc9, 0x68,
-  0xff, 0x96, 0x67,
-  0xa5, 0x60, 0xff,
-  0x51, 0xff, 0x99,
-  0x3f, 0xa5, 0x63,
-  0x98, 0x90, 0x67
-};
+extern bool g_isIdle;
 
 //-----------------------------------------------------------------------------
 // local functions
 //-----------------------------------------------------------------------------
 
-extern void wxFlushResources(void);
+/* forward declaration */
+gint   wxapp_idle_callback( gpointer WXUNUSED(data) );
+void   wxapp_install_idle_handler();
+
+#if wxUSE_THREADS
+gint   wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) );
+#endif
 
 //-----------------------------------------------------------------------------
-// global functions
+// wxExit
 //-----------------------------------------------------------------------------
 
-void wxExit(void)
+void wxExit()
 {
     gtk_main_quit();
 }
 
-bool wxYield(void)
+//-----------------------------------------------------------------------------
+// wxYield
+//-----------------------------------------------------------------------------
+
+bool wxYield()
 {
-    while (gtk_events_pending() > 0) gtk_main_iteration();
+    bool has_idle = (wxTheApp->m_idleTag != 0);
+
+    if (has_idle)
+    {
+        /* We need to temporarily remove idle callbacks or the loop will
+           never finish. */
+        gtk_idle_remove( wxTheApp->m_idleTag );
+        wxTheApp->m_idleTag = 0;
+    }
+
+    while (gtk_events_pending())
+        gtk_main_iteration();
+
+    /* it's necessary to call ProcessIdle() to update the frames sizes which
+       might have been changed (it also will update other things set from
+       OnUpdateUI() which is a nice (and desired) side effect) */
+    while (wxTheApp->ProcessIdle()) { }
+
+    if (has_idle)
+    {
+        /* re-add idle handler */
+        wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
+    }
+
     return TRUE;
 }
 
 //-----------------------------------------------------------------------------
-// wxApp
+// wxWakeUpIdle
 //-----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
-
-BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
-    EVT_IDLE(wxApp::OnIdle)
-END_EVENT_TABLE()
-
-gint wxapp_idle_callback( gpointer WXUNUSED(data) )
+void wxWakeUpIdle()
 {
-    if (wxTheApp) while (wxTheApp->ProcessIdle()) {}
 #if wxUSE_THREADS
-    wxMutexGuiLeave();
+    if (!wxThread::IsMain())
+        wxMutexGuiEnter();
 #endif
-    usleep(10000);
+
+    if (g_isIdle) 
+        wxapp_install_idle_handler();
+    
 #if wxUSE_THREADS
-    wxMutexGuiEnter();
+    if (!wxThread::IsMain())
+        wxMutexGuiLeave();
 #endif
+}
+
+//-----------------------------------------------------------------------------
+// local functions
+//-----------------------------------------------------------------------------
+
+gint wxapp_idle_callback( gpointer WXUNUSED(data) )
+{
+    if (!wxTheApp) return TRUE;
+
+    // when getting called from GDK's time-out handler
+    // we are no longer within GDK's grab on the GUI
+    // thread so we must lock it here ourselves
+    gdk_threads_enter();
+
+    /* sent idle event to all who request them */
+    while (wxTheApp->ProcessIdle()) { }
+
+    /* we don't want any more idle events until the next event is
+       sent to wxGTK */
+    gtk_idle_remove( wxTheApp->m_idleTag );
+    wxTheApp->m_idleTag = 0;
+
+    /* indicate that we are now in idle mode - even so deeply
+       in idle mode that we don't get any idle events anymore.
+       this is like wxMSW where an idle event is sent only
+       once each time after the event queue has been completely
+       emptied */
+    g_isIdle = TRUE;
+
+    // release lock again
+    gdk_threads_leave();
+
     return TRUE;
 }
 
-wxApp::wxApp()
+void wxapp_install_idle_handler()
 {
-    m_idleTag = 0;
-    m_topWindow = (wxWindow *) NULL;
-    m_exitOnFrameDelete = TRUE;
-    wxTheApp = this;
+    wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
+
+    /* This routine gets called by all event handlers
+       indicating that the idle is over. It may also
+       get called from other thread for sending events
+       to the main thread (and processing these in
+       idle time). */
+
+    wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
+
+    g_isIdle = FALSE;
+}
+
+#if wxUSE_THREADS
+
+void wxapp_install_thread_wakeup()
+{
+    if (wxTheApp->m_wakeUpTimerTag) return;
+
+    wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 50, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 }
 
-wxApp::~wxApp(void)
+void wxapp_uninstall_thread_wakeup()
 {
-    gtk_idle_remove( m_idleTag );
+    if (!wxTheApp->m_wakeUpTimerTag) return;
+
+    gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
+    wxTheApp->m_wakeUpTimerTag = 0;
 }
 
-bool wxApp::InitVisual()
+gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 {
-    if (wxVisualSetByExternal)
-    {
-        /* this happens in the wxModule code of the OpenGl canvas. 
-          it chooses the best display for OpenGl and stores it 
-          in wxDisplaySetByExternal. we then have to make it the
-          default for the system */
-          
-       gtk_widget_set_default_visual( wxVisualSetByExternal );
-    }
-    
-    if (wxColormapSetByExternal)
-    {
-        /* OpenGl also gives us a colormap */
-       
-       gtk_widget_set_default_colormap( wxColormapSetByExternal );
-    }
-    else
-    {
-        /* this initiates the standard palette as defined by GdkImlib
-          in the GNOME libraries. it ensures that all GNOME applications
-          use the same 64 colormap entries on 8-bit displays so you
-          can use several rather graphics-heavy applications at the
-          same time */
-    
-        GdkColormap *cmap = gdk_colormap_new( gdk_visual_get_system(), TRUE );
+    // when getting called from GDK's time-out handler
+    // we are no longer within GDK's grab on the GUI
+    // thread so we must lock it here ourselves
+    gdk_threads_enter();
 
-        for (int i = 0; i < 64; i++)
-        {
-            GdkColor col;
-            col.red    = g_palette[i*3 + 0] << 8;
-            col.green  = g_palette[i*3 + 1] << 8;
-            col.blue   = g_palette[i*3 + 2] << 8;
-            col.pixel  = 0;
+    wxapp_uninstall_thread_wakeup();
 
-            gdk_color_alloc( cmap, &col );
-        }
-       
-        gtk_widget_set_default_colormap( cmap );
-    }
+    // unblock other threads wishing to do some GUI things
+    wxMutexGuiLeave();
+
+    // wake up other threads
+    wxUsleep( 1 );
+
+    // block other thread again
+    wxMutexGuiEnter();
+
+    wxapp_install_thread_wakeup();
+
+    // release lock again
+    gdk_threads_leave();
     
     return TRUE;
 }
 
-bool wxApp::OnInitGui(void)
+#endif // wxUSE_THREADS
+
+//-----------------------------------------------------------------------------
+// wxApp
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
+
+BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
+    EVT_IDLE(wxApp::OnIdle)
+END_EVENT_TABLE()
+
+wxApp::wxApp()
 {
-    m_idleTag = gtk_idle_add( wxapp_idle_callback, NULL );
-    
-    return TRUE;
+    wxTheApp = this;
+
+    m_topWindow = (wxWindow *) NULL;
+    m_exitOnFrameDelete = TRUE;
+
+    m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
+
+#if wxUSE_THREADS
+    m_wakeUpTimerTag = 0;
+    wxapp_install_thread_wakeup();
+#endif
+
+    m_colorCube = (unsigned char*) NULL;
 }
 
-bool wxApp::OnInit(void)
+wxApp::~wxApp()
 {
-    return TRUE;
+    if (m_idleTag) gtk_idle_remove( m_idleTag );
+
+#if wxUSE_THREADS
+    wxapp_uninstall_thread_wakeup();
+#endif
+
+    if (m_colorCube) free(m_colorCube);
 }
 
-int wxApp::OnRun(void)
+bool wxApp::OnInitGui()
 {
-    return MainLoop();
+    GdkVisual *visual = gdk_visual_get_system();
+
+    /* on some machines, the default visual is just 256 colours, so
+       we make sure we get the best. this can sometimes be wasteful,
+       of course, but what do these guys pay $30.000 for? */
+/*
+    if (gdk_visual_get_best() != gdk_visual_get_system())
+    {
+        GdkVisual* vis = gdk_visual_get_best();
+        gtk_widget_set_default_visual( vis );
+
+        GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
+        gtk_widget_set_default_colormap( colormap );
+
+        visual = vis;
+    }
+*/
+
+    /* Nothing to do for 15, 16, 24, 32 bit displays */
+    if (visual->depth > 8) return TRUE;
+
+    /* initialize color cube for 8-bit color reduction dithering */
+
+    GdkColormap *cmap = gtk_widget_get_default_colormap();
+
+    m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
+
+    for (int r = 0; r < 32; r++)
+    {
+        for (int g = 0; g < 32; g++)
+        {
+            for (int b = 0; b < 32; b++)
+            {
+                int rr = (r << 3) | (r >> 2);
+                int gg = (g << 3) | (g >> 2);
+                int bb = (b << 3) | (b >> 2);
+
+                int index = -1;
+
+                GdkColor *colors = cmap->colors;
+                if (colors)
+                {
+                    int max = 3 * 65536;
+
+                    for (int i = 0; i < cmap->size; i++)
+                    {
+                        int rdiff = ((rr << 8) - colors[i].red);
+                        int gdiff = ((gg << 8) - colors[i].green);
+                        int bdiff = ((bb << 8) - colors[i].blue);
+                        int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
+                        if (sum < max)
+                        {
+                            index = i; max = sum;
+                        }
+                    }
+                }
+                else
+                {
+#if (GTK_MINOR_VERSION > 0)
+                    /* assume 8-bit true or static colors. this really
+                       exists. */
+                    GdkVisual* vis = gdk_colormap_get_visual( cmap );
+                    index = (r >> (5 - vis->red_prec)) << vis->red_shift;
+                    index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
+                    index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
+#else
+                    wxFAIL_MSG( wxT("Unsupported graphics hardware") );
+#endif
+                }
+                m_colorCube[ (r*1024) + (g*32) + b ] = index;
+            }
+        }
+    }
+
+    return TRUE;
 }
 
-bool wxApp::ProcessIdle(void)
+bool wxApp::ProcessIdle()
 {
     wxIdleEvent event;
     event.SetEventObject( this );
@@ -245,21 +345,27 @@ bool wxApp::ProcessIdle(void)
 
 void wxApp::OnIdle( wxIdleEvent &event )
 {
-    static bool inOnIdle = FALSE;
+    static bool s_inOnIdle = FALSE;
 
     /* Avoid recursion (via ProcessEvent default case) */
-    if (inOnIdle)
+    if (s_inOnIdle)
         return;
 
-    inOnIdle = TRUE;
+    s_inOnIdle = TRUE;
+
+    /* Resend in the main thread events which have been prepared in other
+       threads */
+    ProcessPendingEvents();
 
     /* 'Garbage' collection of windows deleted with Close(). */
     DeletePendingObjects();
 
     /* flush the logged messages if any */
+#if wxUSE_LOG
     wxLog *log = wxLog::GetActiveTarget();
     if (log != NULL && log->HasPendingMessages())
         log->Flush();
+#endif // wxUSE_LOG
 
     /* Send OnIdle events to all windows */
     bool needMore = SendIdleEvents();
@@ -267,21 +373,22 @@ void wxApp::OnIdle( wxIdleEvent &event )
     if (needMore)
         event.RequestMore(TRUE);
 
-    inOnIdle = FALSE;
+    s_inOnIdle = FALSE;
 }
 
-bool wxApp::SendIdleEvents(void)
+bool wxApp::SendIdleEvents()
 {
     bool needMore = FALSE;
 
-    wxNode* node = wxTopLevelWindows.First();
+    wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
     while (node)
     {
-        wxWindow* win = (wxWindow*) node->Data();
+        wxWindow* win = node->GetData();
         if (SendIdleEvents(win))
             needMore = TRUE;
-        node = node->Next();
+        node = node->GetNext();
     }
+
     return needMore;
 }
 
@@ -291,8 +398,11 @@ bool wxApp::SendIdleEvents( wxWindow* win )
 
     wxIdleEvent event;
     event.SetEventObject(win);
+
     win->ProcessEvent(event);
 
+    win->OnInternalIdle();
+
     if (event.MoreRequested())
         needMore = TRUE;
 
@@ -308,37 +418,34 @@ bool wxApp::SendIdleEvents( wxWindow* win )
     return needMore ;
 }
 
-int wxApp::OnExit(void)
-{
-    return 0;
-}
-
-int wxApp::MainLoop(void)
+int wxApp::MainLoop()
 {
     gtk_main();
     return 0;
 }
 
-void wxApp::ExitMainLoop(void)
+void wxApp::ExitMainLoop()
 {
-    gtk_main_quit();
+    if (gtk_main_level() > 0)
+        gtk_main_quit();
 }
 
-bool wxApp::Initialized(void)
+bool wxApp::Initialized()
 {
     return m_initialized;
 }
 
-bool wxApp::Pending(void)
+bool wxApp::Pending()
 {
-    return FALSE;
+    return (gtk_events_pending() > 0);
 }
 
-void wxApp::Dispatch(void)
+void wxApp::Dispatch()
 {
+    gtk_main_iteration();
 }
 
-void wxApp::DeletePendingObjects(void)
+void wxApp::DeletePendingObjects()
 {
     wxNode *node = wxPendingDelete.First();
     while (node)
@@ -347,79 +454,96 @@ void wxApp::DeletePendingObjects(void)
 
         delete obj;
 
-        if (wxPendingDelete.Member(obj))
-        delete node;
+        if (wxPendingDelete.Find(obj))
+            delete node;
 
         node = wxPendingDelete.First();
     }
 }
 
-wxWindow *wxApp::GetTopWindow(void)
+bool wxApp::Initialize()
 {
-    if (m_topWindow) return m_topWindow;
-    wxNode *node = wxTopLevelWindows.First();
-    if (!node) return (wxWindow *) NULL;
-    return (wxWindow*)node->Data();
-}
+    wxBuffer = new wxChar[BUFSIZ + 512];
 
-void wxApp::SetTopWindow( wxWindow *win )
-{
-    m_topWindow = win;
-}
+    wxClassInfo::InitializeClasses();
 
-void wxApp::CommonInit(void)
-{
-  wxSystemSettings::Init();
-  
-  wxTheFontNameDirectory =  new wxFontNameDirectory;
-  wxTheFontNameDirectory->Initialize();
+    wxSystemSettings::Init();
 
-  wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
-  wxTheColourDatabase->Initialize();
+    // 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.
+#if wxUSE_THREADS
+    wxPendingEvents = new wxList();
+    wxPendingEventsLocker = new wxCriticalSection();
+#endif
 
-  wxInitializeStockLists();
-  wxInitializeStockObjects();
+/*
+    wxTheFontNameDirectory =  new wxFontNameDirectory;
+    wxTheFontNameDirectory->Initialize();
+*/
 
-#if wxUSE_WX_RESOURCES
-  wxTheResourceCache = new wxResourceCache(wxKEY_STRING);
-  
-  wxInitializeResourceSystem();
-#endif
+    wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
+    wxTheColourDatabase->Initialize();
 
-  wxImage::InitStandardHandlers();
+    wxInitializeStockLists();
+    wxInitializeStockObjects();
 
-//  g_globalCursor = new wxCursor;
+    wxModule::RegisterModules();
+    if (!wxModule::InitializeModules()) return FALSE;
+
+    return TRUE;
 }
 
-void wxApp::CommonCleanUp(void)
+void wxApp::CleanUp()
 {
-    if (wxTheColourDatabase) delete wxTheColourDatabase;
+    wxModule::CleanUpModules();
+
+    if (wxTheColourDatabase)
+        delete wxTheColourDatabase;
     wxTheColourDatabase = (wxColourDatabase*) NULL;
-    
+
+/*
     if (wxTheFontNameDirectory) delete wxTheFontNameDirectory;
     wxTheFontNameDirectory = (wxFontNameDirectory*) NULL;
-    
+*/
+
     wxDeleteStockObjects();
 
-#if wxUSE_WX_RESOURCES
-    wxFlushResources();
+    wxDeleteStockLists();
 
-    if (wxTheResourceCache) delete wxTheResourceCache;
-    wxTheResourceCache = (wxResourceCache*) NULL;
-    
-    wxCleanUpResourceSystem();
+    delete wxTheApp;
+    wxTheApp = (wxApp*) NULL;
+
+    // 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.
+#if wxUSE_THREADS
+    delete wxPendingEvents;
+    delete wxPendingEventsLocker;
 #endif
 
-    wxDeleteStockLists();
+    wxSystemSettings::Done();
 
-    wxImage::CleanUpHandlers();
+    delete[] wxBuffer;
 
-    wxSystemSettings::Done();
-}
+    wxClassInfo::CleanUpClasses();
 
-wxLog *wxApp::CreateLogTarget()
-{
-  return new wxLogGui;
+    // check for memory leaks
+#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
+    if (wxDebugContext::CountObjectsLeft() > 0)
+    {
+        wxLogDebug(wxT("There were memory leaks.\n"));
+        wxDebugContext::Dump();
+        wxDebugContext::PrintStatistics();
+    }
+#endif // Debug
+
+#if wxUSE_LOG
+    // do this as the very last thing because everything else can log messages
+    wxLog::DontCreateOnDemand();
+
+    wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
+    if (oldLog)
+        delete oldLog;
+#endif // wxUSE_LOG
 }
 
 //-----------------------------------------------------------------------------
@@ -428,18 +552,34 @@ wxLog *wxApp::CreateLogTarget()
 
 int wxEntry( int argc, char *argv[] )
 {
-    wxBuffer = new char[BUFSIZ + 512];
+#if wxUSE_THREADS
+    g_thread_init(NULL);
+#endif
+    
+    gtk_set_locale();
 
-    wxClassInfo::InitializeClasses();
+#if wxUSE_WCHAR_T
+    if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
+#else
+    if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
+#endif
 
+    gdk_threads_enter();
+
+    gtk_init( &argc, &argv );
+
+    wxSetDetectableAutoRepeat( TRUE );
+
+    if (!wxApp::Initialize())
+    {
+        gdk_threads_leave();
+        return -1;
+    }
 
     if (!wxTheApp)
     {
-        if (!wxApp::GetInitializerFunction())
-        {
-            printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
-            return 0;
-        }
+        wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
+                     wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 
         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 
@@ -448,75 +588,117 @@ int wxEntry( int argc, char *argv[] )
         wxTheApp = (wxApp*) test_app;
     }
 
-    if (!wxTheApp)
-    {
-        printf( "wxWindows error: wxTheApp == NULL\n" );
-        return 0;
-    }
+    wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 
     wxTheApp->argc = argc;
+#if wxUSE_UNICODE
+    wxTheApp->argv = new wxChar*[argc+1];
+    int mb_argc = 0;
+    while (mb_argc < argc) 
+    {
+        wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
+        mb_argc++;
+    }
+    wxTheApp->argv[mb_argc] = (wxChar *)NULL;
+#else
     wxTheApp->argv = argv;
+#endif
 
-    char name[200];
-    strcpy( name, argv[0] );
-    strcpy( name, wxFileNameFromPath(name) );
+    wxString name(wxFileNameFromPath(argv[0]));
     wxStripExtension( name );
     wxTheApp->SetAppName( name );
 
-    gtk_set_locale();
-
-    gtk_init( &argc, &argv );
-
-    wxModule::RegisterModules();
-    if (!wxModule::InitializeModules()) return FALSE;
-    
-    if (!wxTheApp->InitVisual()) return 0;
+    int retValue = 0;
 
-    wxApp::CommonInit();
+    if ( !wxTheApp->OnInitGui() )
+        retValue = -1;
 
-    if (!wxTheApp->OnInitGui()) return 0;
+    // Here frames insert themselves automatically into wxTopLevelWindows by
+    // getting created in OnInit().
+    if ( retValue == 0 )
+    {
+        if ( !wxTheApp->OnInit() )
+            retValue = -1;
+    }
 
-    // Here frames insert themselves automatically
-    // into wxTopLevelWindows by getting created
-    // in OnInit().
+    if ( retValue == 0 )
+    {
+        /* delete pending toplevel windows (typically a single
+           dialog) so that, if there isn't any left, we don't
+           call OnRun() */
+        wxTheApp->DeletePendingObjects();
 
-    if (!wxTheApp->OnInit()) return 0;
+        wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 
-    wxTheApp->m_initialized = (wxTopLevelWindows.Number() > 0);
+        if (wxTheApp->Initialized())
+        {
+            retValue = wxTheApp->OnRun();
+
+            wxWindow *topWindow = wxTheApp->GetTopWindow();
+            if (topWindow)
+            {
+                /* Forcibly delete the window. */
+                if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
+                    topWindow->IsKindOf(CLASSINFO(wxDialog)) )
+                {
+                    topWindow->Close( TRUE );
+                    wxTheApp->DeletePendingObjects();
+                }
+                else
+                {
+                    delete topWindow;
+                    wxTheApp->SetTopWindow( (wxWindow*) NULL );
+                }
+            }
+            wxTheApp->OnExit();
+        }
+    }
 
-    int retValue = 0;
+#if wxUSE_LOG
+    // flush the logged messages if any
+    wxLog *log = wxLog::GetActiveTarget();
+    if (log != NULL && log->HasPendingMessages())
+        log->Flush();
 
-    if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
+    // continuing to use user defined log target is unsafe from now on because
+    // some resources may be already unavailable, so replace it by something
+    // more safe
+    wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
+    if ( oldlog )
+        delete oldlog;
+#endif // wxUSE_LOG
 
-    wxTheApp->DeletePendingObjects();
+    wxApp::CleanUp();
 
-    wxTheApp->OnExit();
+    gdk_threads_leave();
 
-    wxModule::CleanUpModules();
+    return retValue;
+}
 
-    wxApp::CommonCleanUp();
+#include "wx/gtk/info.xpm"
+#include "wx/gtk/error.xpm"
+#include "wx/gtk/question.xpm"
+#include "wx/gtk/warning.xpm"
 
-    delete wxTheApp;
-    wxTheApp = (wxApp*) NULL;
+wxIcon
+wxApp::GetStdIcon(int which) const
+{
+    switch(which)
+    {
+        case wxICON_INFORMATION:
+            return wxIcon(info_xpm);
 
-    wxClassInfo::CleanUpClasses();
+        case wxICON_QUESTION:
+            return wxIcon(question_xpm);
 
-    delete[] wxBuffer;
+        case wxICON_EXCLAMATION:
+            return wxIcon(warning_xpm);
 
-#if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
+        default:
+            wxFAIL_MSG(wxT("requested non existent standard icon"));
+            // still fall through
 
-    if (wxDebugContext::CountObjectsLeft() > 0)
-    {
-        wxLogDebug("There were memory leaks.\n");
-        wxDebugContext::Dump();
-        wxDebugContext::PrintStatistics();
+        case wxICON_HAND:
+            return wxIcon(error_xpm);
     }
-
-#endif
-
-    wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
-    if (oldLog) delete oldLog;
-
-    return retValue;
 }
-