work on a special connect function that registers a callback

[debian/gnuradio] / gr-wxgui / src / python / common.py

diff --git a/gr-wxgui/src/python/common.py b/gr-wxgui/src/python/common.py
index f355fd3ce6d91e4deecf19529702d672674f327c..09ce4471944d1d04b80aa4904618ee994376e473 100644 (file)
--- a/gr-wxgui/src/python/common.py
+++ b/gr-wxgui/src/python/common.py
@@ -54,6 +54,26 @@ def bind_to_visible_event(win, callback):
                        win.Bind(wx.EVT_ACTIVATE, handler)
                win = win.GetParent()
 
+from gnuradio import gr
+
+def special_connect(source, sink, hb, win, size):
+       nulls = [gr.null_sink(size), gr.null_source(size)]
+       def callback(visible, init=False):
+               if not init: hb.lock()
+               if visible:
+                       if not init: hb.disconnect(source, nulls[0])
+                       if not init: hb.disconnect(nulls[1], sink)
+                       hb.connect(source, sink)
+                       #hb.connect(nulls[1], nulls[0])
+               else:
+                       if not init: hb.disconnect(source, sink)
+                       #if not init: hb.disconnect(nulls[1], nulls[0])
+                       hb.connect(source, nulls[0])
+                       hb.connect(nulls[1], sink)
+               if not init: hb.unlock()
+       callback(False, init=True) #initially connect
+       bind_to_visible_event(win, callback)
+
 #A macro to apply an index to a key
 index_key = lambda key, i: "%s_%d"%(key, i+1)