Added wxWakeUpMainThread, wxMutexGuiEnter, wxMutexGuiLeave,

wxMutexGuiLocker and wxThread_IsMain to assist with dealing with GUI
access from non-GUI threads.

wxPyOnDemandOutputWindow is now thread safe if non-GUI threads use
print, sys.stdout.write, etc.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9590 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/src/_extras.py

@@ -714,20 +714,22 @@ class wxPyOnDemandOutputWindow:
         self.title  = title
         self.parent = None
 
-
     def SetParent(self, parent):
         self.parent = parent
 
-
     def OnCloseWindow(self, event):
         if self.frame != None:
             self.frame.Destroy()
         self.frame = None
         self.text  = None
 
-
-    # this provides the file-like output behaviour
+    # These methods provide the file-like output behaviour.
     def write(self, str):
+        if not wxThread_IsMain():
+            # Aquire the GUI mutex before making GUI calls.  Mutex is released
+            # when locker is deleted a the end of this function.
+            locker = wxMutexGuiLocker()
+
         if not self.frame:
             self.frame = wxFrame(self.parent, -1, self.title)
             self.text  = wxTextCtrl(self.frame, -1, "",
@@ -737,13 +739,13 @@ class wxPyOnDemandOutputWindow:
             EVT_CLOSE(self.frame, self.OnCloseWindow)
         self.text.AppendText(str)
 
-
     def close(self):
         if self.frame != None:
+            if not wxThread_IsMain():
+                locker = wxMutexGuiLocker()
             self.frame.Close()
 
 
-
 _defRedirect = (wxPlatform == '__WXMSW__')
 
 #----------------------------------------------------------------------