add wx-main-loop

direct/src/showbase/ShowBase.py

@@ -2736,6 +2736,11 @@ class ShowBase(DirectObject.DirectObject):
         # Create a new base.wxApp.
         self.wxApp = wx.PySimpleApp(redirect = False)
 
+        if ConfigVariableBool('wx-main-loop', True):
+            # Put wxPython in charge of the main loop.  It really
+            # seems to like this better; some features of wx don't
+            # work properly unless this is true.
+            
             # Set a timer to run the Panda frame 60 times per second.
             self.wxTimer = wx.Timer(self.wxApp)
             self.wxTimer.Start(1000.0/60.0)
@@ -2748,6 +2753,22 @@ class ShowBase(DirectObject.DirectObject):
             if self.appRunner:
                 self.appRunner.run = self.wxRun
 
+        else:
+            # Leave Panda in charge of the main loop.  This is
+            # friendlier for IDE's and interactive editing in general.
+            def wxLoop(task):
+                # First we need to ensure that the OS message queue is
+                # processed.
+                base.wxApp.Yield()
+
+                # Now do all the wxPython events waiting on this frame.
+                while base.wxApp.Pending():
+                    base.wxApp.Dispatch()
+
+                return task.again
+
+            taskMgr.add(wxLoop, 'wxLoop')
+
     def __wxTimerCallback(self, event):
         if Thread.getCurrentThread().getCurrentTask():
             # This happens when the wxTimer expires while igLoop is