added wxLog::Suspend/Resume and wxYield() uses them now so that it won't flush

the messages any more


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6204 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/log.h

@@ -134,17 +134,27 @@ public:
     // only one sink is active at each moment
         // flush the active target if any
     static void FlushActive()
+    {
+        if ( !ms_suspendCount )
         {
             wxLog *log = GetActiveTarget();
-        if ( log )
+            if ( log && log->HasPendingMessages() )
                 log->Flush();
         }
+    }
         // get current log target, will call wxApp::CreateLogTarget() to
         // create one if none exists
     static wxLog *GetActiveTarget();
         // change log target, pLogger may be NULL
     static wxLog *SetActiveTarget(wxLog *pLogger);
 
+        // suspend the message flushing of the main target until the next call
+        // to Resume() - this is mainly for internal use (to prevent wxYield()
+        // from flashing the messages)
+    static void Suspend() { ms_suspendCount++; }
+        // must be called for each Suspend()!
+    static void Resume() { ms_suspendCount--; }
+
     // functions controlling the default wxLog behaviour
         // verbose mode is activated by standard command-line '-verbose'
         // option
@@ -205,6 +215,8 @@ private:
     static bool        ms_doLog;        // FALSE => all logging disabled
     static bool        ms_bAutoCreate;  // create new log targets on demand?
 
+    static size_t      ms_suspendCount; // if positive, logs are not flushed
+
     // format string for strftime(), if NULL, time stamping log messages is
     // disabled
     static const wxChar *ms_timestamp;

src/common/log.cpp

@@ -448,6 +448,8 @@ wxLog          *wxLog::ms_pLogger      = (wxLog *)NULL;
 bool            wxLog::ms_doLog        = TRUE;
 bool            wxLog::ms_bAutoCreate  = TRUE;
 
+size_t          wxLog::ms_suspendCount = 0;
+
 #if wxUSE_GUI
     const wxChar *wxLog::ms_timestamp  = wxT("%X");  // time only, no date
 #else

src/gtk/app.cpp

@@ -99,10 +99,18 @@ bool wxYield()
         wxTheApp->m_idleTag = gtk_idle_add( 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();
+
     /* 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()) { }
+    while (wxTheApp->ProcessIdle())
+        ;
+
+    // let the logs be flashed again
+    wxLog::Resume();
 
     return TRUE;
 }
@@ -380,9 +388,7 @@ void wxApp::OnIdle( wxIdleEvent &event )
 
     /* flush the logged messages if any */
 #if wxUSE_LOG
-    wxLog *log = wxLog::GetActiveTarget();
-    if (log != NULL && log->HasPendingMessages())
-        log->Flush();
+    wxLog::FlushActive();
 #endif // wxUSE_LOG
 }
 

src/gtk1/app.cpp

@@ -99,10 +99,18 @@ bool wxYield()
         wxTheApp->m_idleTag = gtk_idle_add( 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();
+
     /* 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()) { }
+    while (wxTheApp->ProcessIdle())
+        ;
+
+    // let the logs be flashed again
+    wxLog::Resume();
 
     return TRUE;
 }
@@ -380,9 +388,7 @@ void wxApp::OnIdle( wxIdleEvent &event )
 
     /* flush the logged messages if any */
 #if wxUSE_LOG
-    wxLog *log = wxLog::GetActiveTarget();
-    if (log != NULL && log->HasPendingMessages())
-        log->Flush();
+    wxLog::FlushActive();
 #endif // wxUSE_LOG
 }
 

src/msw/app.cpp

@@ -1019,9 +1019,7 @@ void wxApp::OnIdle(wxIdleEvent& event)
 
 #if wxUSE_LOG
     // flush the logged messages if any
-    wxLog *pLog = wxLog::GetActiveTarget();
-    if ( pLog != NULL && pLog->HasPendingMessages() )
-        pLog->Flush();
+    wxLog::FlushActive();
 #endif // wxUSE_LOG
 
     // Send OnIdle events to all windows
@@ -1216,9 +1214,12 @@ void wxExit()
 // Yield to incoming messages
 bool wxYield()
 {
+    // disable log flushing from here because a call to wxYield() shouldn't
+    // normally result in message boxes popping up &c
+    wxLog::Suspend();
+
     // we don't want to process WM_QUIT from here - it should be processed in
     // the main event loop in order to stop it
-
     MSG msg;
     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
             msg.message != WM_QUIT )
@@ -1234,6 +1235,9 @@ bool wxYield()
     // If they are pending events, we must process them.
     wxTheApp->ProcessPendingEvents();
 
+    // let the logs be flashed again
+    wxLog::Resume();
+
     return TRUE;
 }