diff options
Diffstat (limited to 'gr-wxgui/src/python/common.py')
| -rw-r--r-- | gr-wxgui/src/python/common.py | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/gr-wxgui/src/python/common.py b/gr-wxgui/src/python/common.py index fe080aa4ad..dca41c9a3e 100644 --- a/gr-wxgui/src/python/common.py +++ b/gr-wxgui/src/python/common.py @@ -19,6 +19,9 @@ # Boston, MA 02110-1301, USA. # +################################################## +# conditional disconnections of wx flow graph +################################################## import wx def bind_to_visible_event(win, callback): @@ -51,14 +54,14 @@ def bind_to_visible_event(win, callback): from gnuradio import gr -def special_connect(source, sink, hb, win, size): +def conditional_connect(source, sink, hb, win, size): nulls = list() cache = [None] def callback(visible, init=False): if visible == cache[0]: return cache[0] = visible if not init: hb.lock() - print 'visible', visible + print 'visible', visible, source, sink if visible: if not init: hb.disconnect(source, nulls[0]) @@ -75,6 +78,24 @@ def special_connect(source, sink, hb, win, size): callback(False, init=True) #initially connect bind_to_visible_event(win, callback) +class wxgui_hb(object): + def wxgui_connect(self, *points): + """ + Use wxgui connect when the first point is the self source of the hb. + The win property of this object should be set to the wx window. + When this method tries to connect self to the next point, + it will conditionally make this connection based on the visibility state. + """ + try: + assert points[0] == self or points[0][0] == self + conditional_connect( + points[0], points[1], + win=self.win, hb=self, + size=self._hb.input_signature().sizeof_stream_item(0), + ) + if len(points[1:]) > 1: self.connect(*points[1:]) + except (AssertionError, IndexError): self.connect(*points) + #A macro to apply an index to a key index_key = lambda key, i: "%s_%d"%(key, i+1) |