Added a file

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

diff --git a/src/gtk/app.cpp b/src/gtk/app.cpp
index 860d6d6c71fde7721580c66a5eac6d4980d2ab3e..e2bdb2f3441e2090d85d8ebf1719837f9a87452a 100644 (file)
--- a/src/gtk/app.cpp
+++ b/src/gtk/app.cpp
@@ -52,7 +52,7 @@ extern bool g_isIdle;
 bool   g_mainThreadLocked = FALSE;
 gint   g_pendingTag = 0;
 
-GtkWidget *wxRootWindow = (GtkWidget*) NULL;
+static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
 
 //-----------------------------------------------------------------------------
 // local functions
@@ -80,27 +80,37 @@ void wxExit()
 // wxYield
 //-----------------------------------------------------------------------------
 
+static bool gs_inYield = FALSE;
+
 bool wxYield()
 {
-    bool has_idle = (wxTheApp->m_idleTag != 0);
+#if wxUSE_THREADS
+    if ( !wxThread::IsMain() )
+    {
+        // can't call gtk_main_iteration() from other threads like this
+        return TRUE;
+    }
+#endif // wxUSE_THREADS
+
+#ifdef __WXDEBUG__
+    if (gs_inYield)
+        wxFAIL_MSG( wxT("wxYield called recursively" ) );
+#endif
 
-    if (has_idle)
+    gs_inYield = TRUE;
+
+    if (!g_isIdle)
     {
-        /* We need to temporarily remove idle callbacks or the loop will
-           never finish. */
+        // We need to remove idle callbacks or the loop will
+        // never finish.
         gtk_idle_remove( wxTheApp->m_idleTag );
         wxTheApp->m_idleTag = 0;
+        g_isIdle = TRUE;
     }
 
     while (gtk_events_pending())
         gtk_main_iteration();
 
-    if (has_idle)
-    {
-        /* re-add idle handler (very low priority) */
-        wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
-    }
-
     // disable log flushing from here because a call to wxYield() shouldn't
     // normally result in message boxes popping up &c
     wxLog::Suspend();
@@ -113,9 +123,24 @@ bool wxYield()
     // let the logs be flashed again
     wxLog::Resume();
 
+    gs_inYield = FALSE;
+
     return TRUE;
 }
 
+//-----------------------------------------------------------------------------
+// wxYieldIfNeeded
+// Like wxYield, but fails silently if the yield is recursive.
+//-----------------------------------------------------------------------------
+
+bool wxYieldIfNeeded()
+{
+    if (gs_inYield)
+        return FALSE;
+
+    return wxYield();
+}
+
 //-----------------------------------------------------------------------------
 // wxWakeUpIdle
 //-----------------------------------------------------------------------------
@@ -143,7 +168,7 @@ void wxWakeUpIdle()
 gint wxapp_pending_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
@@ -170,15 +195,12 @@ gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 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()) { }
-
     /* 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
@@ -187,6 +209,9 @@ gint wxapp_idle_callback( gpointer WXUNUSED(data) )
     g_isIdle = TRUE;
     wxTheApp->m_idleTag = 0;
 
+    // Sent idle event to all who request them
+    while (wxTheApp->ProcessIdle()) { }
+
     // Release lock again
     gdk_threads_leave();
 
@@ -199,9 +224,11 @@ void wxapp_install_idle_handler()
 {
     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 
+    g_isIdle = FALSE;
+
     if (g_pendingTag == 0)
         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
-        
+
     /* 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
@@ -209,8 +236,6 @@ void wxapp_install_idle_handler()
        idle time). Very low priority. */
 
     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
-
-    g_isIdle = FALSE;
 }
 
 #if wxUSE_THREADS
@@ -220,7 +245,7 @@ static int g_threadUninstallLevel = 0;
 void wxapp_install_thread_wakeup()
 {
     g_threadUninstallLevel++;
-    
+
     if (g_threadUninstallLevel != 1) return;
 
     if (wxTheApp->m_wakeUpTimerTag) return;
@@ -231,7 +256,7 @@ void wxapp_install_thread_wakeup()
 void wxapp_uninstall_thread_wakeup()
 {
     g_threadUninstallLevel--;
-    
+
     if (g_threadUninstallLevel != 0) return;
 
     if (!wxTheApp->m_wakeUpTimerTag) return;
@@ -284,12 +309,8 @@ END_EVENT_TABLE()
 
 wxApp::wxApp()
 {
-    wxTheApp = this;
-
-    m_topWindow = (wxWindow *) NULL;
-    m_exitOnFrameDelete = TRUE;
-
-    m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
+    m_idleTag = 0;
+    wxapp_install_idle_handler();
 
 #if wxUSE_THREADS
     m_wakeUpTimerTag = 0;
@@ -297,8 +318,6 @@ wxApp::wxApp()
 #endif
 
     m_colorCube = (unsigned char*) NULL;
-
-    m_useBestVisual = FALSE;
 }
 
 wxApp::~wxApp()
@@ -314,6 +333,9 @@ wxApp::~wxApp()
 
 bool wxApp::OnInitGui()
 {
+    if ( !wxAppBase::OnInitGui() )
+        return FALSE;
+
     GdkVisual *visual = gdk_visual_get_system();
 
     /* on some machines, the default visual is just 256 colours, so
@@ -523,6 +545,10 @@ bool wxApp::Initialize()
     wxClassInfo::InitializeClasses();
 
     wxSystemSettings::Init();
+    
+#if wxUSE_INTL
+    wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
+#endif
 
     // 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.
@@ -600,6 +626,19 @@ void wxApp::CleanUp()
 #endif // wxUSE_LOG
 }
 
+//-----------------------------------------------------------------------------
+// Access to the root window global
+//-----------------------------------------------------------------------------
+
+GtkWidget* wxGetRootWindow()
+{
+    if (gs_RootWindow == NULL) {
+        gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
+        gtk_widget_realize( gs_RootWindow );
+    }
+    return gs_RootWindow;
+}
+
 //-----------------------------------------------------------------------------
 // wxEntry
 //-----------------------------------------------------------------------------
@@ -623,11 +662,14 @@ int wxEntryStart( int argc, char *argv[] )
 
     gtk_set_locale();
 
+    // We should have the wxUSE_WCHAR_T test on the _outside_
+#if wxUSE_WCHAR_T
 #if defined(__WXGTK20__)
     // gtk+ 2.0 supports Unicode through UTF-8 strings
     wxConvCurrent = &wxConvUTF8;
-#elif wxUSE_WCHAR_T
+#else
     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
+#endif
 #else
     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 #endif
@@ -655,8 +697,7 @@ int wxEntryInitGui()
     if ( !wxTheApp->OnInitGui() )
         retValue = -1;
 
-    wxRootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
-    gtk_widget_realize( wxRootWindow );
+    wxGetRootWindow();
 
     return retValue;
 }