Get synchronous writes working under windows.

IPython/frontend/wx/console_widget.py

@@ -174,10 +174,7 b' class ConsoleWidget(editwindow.EditWindow):'
         if refresh:
             current_time = time.time()
             if current_time - self._last_refresh_time > 0.03:
-                # Maybe this is faster than wx.Yield(), this is certainly
-                # more robust under windows, as it avoids recursive
-                # Yields.
-                self.ProcessEvent(wx.PaintEvent())
+                wx.Yield()
                 self._last_refresh_time = current_time 
 
    

IPython/frontend/wx/wx_frontend.py

@@ -286,10 +286,12 b' class WxController(ConsoleWidget, PrefilterFrontEnd):'
             if i in self._markers:
                 self.MarkerDeleteHandle(self._markers[i])
             self._markers[i] = self.MarkerAdd(i, _COMPLETE_BUFFER_MARKER)
-        # Update the display:
-        wx.Yield()
-        self.GotoPos(self.GetLength())
-        PrefilterFrontEnd.execute(self, python_string, raw_string=raw_string)
+        # Use a callafter to update the display robustly under windows
+        def callback():
+            self.GotoPos(self.GetLength())
+            PrefilterFrontEnd.execute(self, python_string, 
+                                            raw_string=raw_string)
+        wx.CallAfter(callback)
 
     def save_output_hooks(self):    
         self.__old_raw_input = __builtin__.raw_input