check in the 'selective yield' patch (see ticket #10320):

- implements YieldFor() with event filtering for wxMSW and wxGTK,
  adds TODO markers in other ports;
- replaces wxYield() in GTK's clipboard code with a wxTheApp->YieldFor() call, thus fixing possible reentrancies 
(and modifies clipboard sample to test synchronous IsSupported calls)
- replaces wxYieldIfNeeded() calls in wxProgressDialog with wxTheApp->YieldFor() calls, so that it processes only 
UI/user-input events, thus fixing the race condition visible in the "thread" sample
- documents the new functions


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58654 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/app.cpp

@@ -103,7 +103,7 @@ static wxMutex gs_idleTagsMutex;
 // wxYield
 //-----------------------------------------------------------------------------
 
-bool wxApp::Yield(bool onlyIfNeeded)
+bool wxApp::DoYield(bool onlyIfNeeded, long eventsToProcess)
 {
     if ( m_isInsideYield )
     {
@@ -124,6 +124,7 @@ bool wxApp::Yield(bool onlyIfNeeded)
 #endif // wxUSE_THREADS
 
     m_isInsideYield = true;
+    m_eventsToProcessInsideYield = eventsToProcess;
 
     // We need to remove idle callbacks or the loop will
     // never finish.
@@ -135,6 +136,7 @@ bool wxApp::Yield(bool onlyIfNeeded)
     wxLog::Suspend();
 #endif
 
+    // TODO: implement event filtering using the eventsToProcess mask
     while (gtk_events_pending())
         gtk_main_iteration();