[Commit-gnuradio] [gnuradio] 02/03: wxgui: Make sure to only start the flow graph once all init is done

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trondeau pushed a commit to branch maint
in repository gnuradio.

commit 984273433c97471484bdb45c0865448a915655ee
Author: Sylvain Munaut <address@hidden>
Date:   Sun Dec 15 14:54:31 2013 +0100

    wxgui: Make sure to only start the flow graph once all init is done
    
    Currently we start the flow graph in the stdframe constructor.
    However at that point, the frame isn't attached to the app and it's not
    "shown" yet which means some UI operations can still fail.
    
    This is a race condition which happens on OSX. You can reproduce it on
    linux as well by adding a sleep(1) after starting the flow graph.
    
    Signed-off-by: Sylvain Munaut <address@hidden>
---
 gr-wxgui/python/wxgui/stdgui2.py | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/gr-wxgui/python/wxgui/stdgui2.py b/gr-wxgui/python/wxgui/stdgui2.py
index 53b389d..dbd0307 100644
--- a/gr-wxgui/python/wxgui/stdgui2.py
+++ b/gr-wxgui/python/wxgui/stdgui2.py
@@ -46,16 +46,20 @@ class stdapp (wx.App):
         wx.App.__init__ (self, redirect=False)
 
     def OnInit (self):
-        frame = stdframe (self.top_block_maker, self.title, self._nstatus,
-                          self._max_noutput_items)
+        frame = stdframe (self.top_block_maker, self.title, self._nstatus)
         frame.Show (True)
         self.SetTopWindow (frame)
+
+        if(self._max_noutput_items is not None):
+            frame.top_block().start (self._max_noutput_items)
+        else:
+            frame.top_block().start ()
+
         return True
 
 
 class stdframe (wx.Frame):
-    def __init__ (self, top_block_maker, title="GNU Radio", nstatus=2,
-                  max_nouts=None):
+    def __init__ (self, top_block_maker, title="GNU Radio", nstatus=2):
         # print "stdframe.__init__"
         wx.Frame.__init__(self, None, -1, title)
 
@@ -69,7 +73,7 @@ class stdframe (wx.Frame):
         self.SetMenuBar (mainmenu)
 
         self.Bind (wx.EVT_CLOSE, self.OnCloseWindow)
-        self.panel = stdpanel (self, self, top_block_maker, max_nouts)
+        self.panel = stdpanel (self, self, top_block_maker)
         vbox = wx.BoxSizer(wx.VERTICAL)
         vbox.Add(self.panel, 1, wx.EXPAND)
         self.SetSizer(vbox)
@@ -85,8 +89,7 @@ class stdframe (wx.Frame):
         return self.panel.top_block
 
 class stdpanel (wx.Panel):
-    def __init__ (self, parent, frame, top_block_maker,
-                  max_nouts=None):
+    def __init__ (self, parent, frame, top_block_maker):
         # print "stdpanel.__init__"
         wx.Panel.__init__ (self, parent, -1)
         self.frame = frame
@@ -97,11 +100,6 @@ class stdpanel (wx.Panel):
         self.SetAutoLayout (True)
         vbox.Fit (self)
 
-        if(max_nouts is not None):
-            self.top_block.start (max_nouts)
-        else:
-            self.top_block.start ()
-
 class std_top_block (gr.top_block):
     def __init__ (self, parent, panel, vbox, argv):
         # Call the hier_block2 constructor