[Commit-gnuradio] r4673 - gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python

[jcorgan]

Author: jcorgan
Date: 2007-03-01 09:08:47 -0700 (Thu, 01 Mar 2007)
New Revision: 4673

Added:
   gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/fftsink2.py
   gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/stdgui2.py
Modified:
   gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/Makefile.am
Log:
Added new hierarchical block versions of stdgui and fftsink.

Modified: 
gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/Makefile.am
===================================================================
--- gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/Makefile.am    
2007-02-28 22:55:10 UTC (rev 4672)
+++ gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/Makefile.am    
2007-03-01 16:08:47 UTC (rev 4673)
@@ -32,10 +32,12 @@
        __init__.py                     \
        form.py                         \
        fftsink.py                      \
+       fftsink2.py                     \
        plot.py                         \
        powermate.py                    \
        scopesink.py                    \
        waterfallsink.py                \
        slider.py                       \
        stdgui.py                       \
+       stdgui2.py                      \
        numbersink.py           

Copied: 
gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/fftsink2.py (from 
rev 4671, 
gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/fftsink.py)
===================================================================
--- gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/fftsink2.py    
                        (rev 0)
+++ gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/fftsink2.py    
2007-03-01 16:08:47 UTC (rev 4673)
@@ -0,0 +1,506 @@
+#!/usr/bin/env python
+#
+# Copyright 2003,2004,2005,2006 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+from gnuradio import gr, gru, window
+from gnuradio.wxgui import stdgui2
+import wx
+import gnuradio.wxgui.plot as plot
+import Numeric
+import threading
+import math    
+
+default_fftsink_size = (640,240)
+default_fft_rate = gr.prefs().get_long('wxgui', 'fft_rate', 15)
+
+class fft_sink_base(object):
+    def __init__(self, input_is_real=False, baseband_freq=0, y_per_div=10, 
ref_level=50,
+                 sample_rate=1, fft_size=512,
+                 fft_rate=default_fft_rate,
+                 average=False, avg_alpha=None, title='', peak_hold=False):
+
+        # initialize common attributes
+        self.baseband_freq = baseband_freq
+        self.y_divs = 8
+        self.y_per_div=y_per_div
+        self.ref_level = ref_level
+        self.sample_rate = sample_rate
+        self.fft_size = fft_size
+        self.fft_rate = fft_rate
+        self.average = average
+        if avg_alpha is None:
+            self.avg_alpha = 2.0 / fft_rate
+        else:
+            self.avg_alpha = avg_alpha
+        self.title = title
+        self.peak_hold = peak_hold
+        self.input_is_real = input_is_real
+        self.msgq = gr.msg_queue(2)         # queue that holds a maximum of 2 
messages
+
+    def set_y_per_div(self, y_per_div):
+        self.y_per_div = y_per_div
+
+    def set_ref_level(self, ref_level):
+        self.ref_level = ref_level
+
+    def set_average(self, average):
+        self.average = average
+        if average:
+            self.avg.set_taps(self.avg_alpha)
+            self.set_peak_hold(False)
+        else:
+            self.avg.set_taps(1.0)
+
+    def set_peak_hold(self, enable):
+        self.peak_hold = enable
+        if enable:
+            self.set_average(False)
+        self.win.set_peak_hold(enable)
+
+    def set_avg_alpha(self, avg_alpha):
+        self.avg_alpha = avg_alpha
+
+    def set_baseband_freq(self, baseband_freq):
+        self.baseband_freq = baseband_freq
+
+    def set_sample_rate(self, sample_rate):
+        self.sample_rate = sample_rate
+        self._set_n()
+
+    def _set_n(self):
+        self.one_in_n.set_n(max(1, 
int(self.sample_rate/self.fft_size/self.fft_rate)))
+        
+
+class fft_sink_f(gr.hier_block2, fft_sink_base):
+    def __init__(self, parent, baseband_freq=0,
+                 y_per_div=10, ref_level=50, sample_rate=1, fft_size=512,
+                 fft_rate=default_fft_rate, average=False, avg_alpha=None,
+                 title='', size=default_fftsink_size, peak_hold=False):
+
+        gr.hier_block2.__init__(self, "fft_sink_f",
+                                gr.io_signature(1, 1, gr.sizeof_float),
+                                gr.io_signature(0,0,0))
+
+        fft_sink_base.__init__(self, input_is_real=True, 
baseband_freq=baseband_freq,
+                               y_per_div=y_per_div, ref_level=ref_level,
+                               sample_rate=sample_rate, fft_size=fft_size,
+                               fft_rate=fft_rate,
+                               average=average, avg_alpha=avg_alpha, 
title=title,
+                               peak_hold=peak_hold)
+                               
+        self.define_component("s2p", gr.stream_to_vector(gr.sizeof_float, 
self.fft_size))
+        self.one_in_n = gr.keep_one_in_n(gr.sizeof_float * self.fft_size,
+                                         max(1, 
int(self.sample_rate/self.fft_size/self.fft_rate)))
+        self.define_component("one_in_n", self.one_in_n)
+        
+        mywindow = window.blackmanharris(self.fft_size)
+        self.define_component("fft", gr.fft_vfc(self.fft_size, True, mywindow))
+        power = 0
+        for tap in mywindow:
+            power += tap*tap
+            
+        self.define_component("c2mag", gr.complex_to_mag(self.fft_size))
+        self.avg = gr.single_pole_iir_filter_ff(1.0, self.fft_size)
+        self.define_component("avg", self.avg)
+
+        # FIXME  We need to add 3dB to all bins but the DC bin
+        self.define_component("log", gr.nlog10_ff(20, self.fft_size,
+                                     
-20*math.log10(self.fft_size)-10*math.log10(power/self.fft_size)))
+        self.define_component("sink", gr.message_sink(gr.sizeof_float * 
self.fft_size, self.msgq, True))
+
+
+        # Ultimately this will be
+        # self.connect("self s2p one_in_n fft c2mag avg log sink")
+        self.connect("self", 0, "s2p", 0)
+        self.connect("s2p", 0, "one_in_n", 0)
+        self.connect("one_in_n", 0, "fft", 0)
+        self.connect("fft", 0, "c2mag", 0)
+        self.connect("c2mag", 0, "avg", 0)
+        self.connect("avg", 0, "log", 0)
+        self.connect("log", 0, "sink", 0)
+                              
+        self.win = fft_window(self, parent, size=size)
+        self.set_average(self.average)
+
+
+class fft_sink_c(gr.hier_block2, fft_sink_base):
+    def __init__(self, parent, baseband_freq=0,
+                 y_per_div=10, ref_level=50, sample_rate=1, fft_size=512,
+                 fft_rate=default_fft_rate, average=False, avg_alpha=None,
+                 title='', size=default_fftsink_size, peak_hold=False):
+
+        gr.hier_block2.__init__(self, "fft_sink_c",
+                                gr.io_signature(1, 1, gr.sizeof_gr_complex),
+                                gr.io_signature(0,0,0))
+
+        fft_sink_base.__init__(self, input_is_real=False, 
baseband_freq=baseband_freq,
+                               y_per_div=y_per_div, ref_level=ref_level,
+                               sample_rate=sample_rate, fft_size=fft_size,
+                               fft_rate=fft_rate,
+                               average=average, avg_alpha=avg_alpha, 
title=title,
+                               peak_hold=peak_hold)
+
+        self.define_component("s2p", gr.stream_to_vector(gr.sizeof_gr_complex, 
self.fft_size))
+        self.one_in_n = gr.keep_one_in_n(gr.sizeof_gr_complex * self.fft_size,
+                                         max(1, 
int(self.sample_rate/self.fft_size/self.fft_rate)))
+        self.define_component("one_in_n", self.one_in_n)
+        
+        mywindow = window.blackmanharris(self.fft_size)
+        self.define_component("fft", gr.fft_vcc(self.fft_size, True, mywindow))
+        power = 0
+        for tap in mywindow:
+            power += tap*tap
+            
+        self.define_component("c2mag", gr.complex_to_mag(self.fft_size))
+        self.avg = gr.single_pole_iir_filter_ff(1.0, self.fft_size)
+        self.define_component("avg", self.avg)
+
+        # FIXME  We need to add 3dB to all bins but the DC bin
+        self.define_component("log", gr.nlog10_ff(20, self.fft_size,
+                                     
-20*math.log10(self.fft_size)-10*math.log10(power/self.fft_size)))
+        self.define_component("sink", gr.message_sink(gr.sizeof_float * 
self.fft_size, self.msgq, True))
+
+        # Ultimately this will be
+        # self.connect("self s2p one_in_n fft c2mag avg log sink")
+        self.connect("self", 0, "s2p", 0)
+        self.connect("s2p", 0, "one_in_n", 0)
+        self.connect("one_in_n", 0, "fft", 0)
+        self.connect("fft", 0, "c2mag", 0)
+        self.connect("c2mag", 0, "avg", 0)
+        self.connect("avg", 0, "log", 0)
+        self.connect("log", 0, "sink", 0)
+
+        self.win = fft_window(self, parent, size=size)
+        self.set_average(self.average)
+
+
+# ------------------------------------------------------------------------
+
+myDATA_EVENT = wx.NewEventType()
+EVT_DATA_EVENT = wx.PyEventBinder (myDATA_EVENT, 0)
+
+
+class DataEvent(wx.PyEvent):
+    def __init__(self, data):
+        wx.PyEvent.__init__(self)
+        self.SetEventType (myDATA_EVENT)
+        self.data = data
+
+    def Clone (self): 
+        self.__class__ (self.GetId())
+
+
+class input_watcher (threading.Thread):
+    def __init__ (self, msgq, fft_size, event_receiver, **kwds):
+        threading.Thread.__init__ (self, **kwds)
+        self.setDaemon (1)
+        self.msgq = msgq
+        self.fft_size = fft_size
+        self.event_receiver = event_receiver
+        self.keep_running = True
+        self.start ()
+
+    def run (self):
+        while (self.keep_running):
+            msg = self.msgq.delete_head()  # blocking read of message queue
+            itemsize = int(msg.arg1())
+            nitems = int(msg.arg2())
+
+            s = msg.to_string()            # get the body of the msg as a 
string
+
+            # There may be more than one FFT frame in the message.
+            # If so, we take only the last one
+            if nitems > 1:
+                start = itemsize * (nitems - 1)
+                s = s[start:start+itemsize]
+
+            complex_data = Numeric.fromstring (s, Numeric.Float32)
+            de = DataEvent (complex_data)
+            wx.PostEvent (self.event_receiver, de)
+            del de
+    
+
+class fft_window (plot.PlotCanvas):
+    def __init__ (self, fftsink, parent, id = -1,
+                  pos = wx.DefaultPosition, size = wx.DefaultSize,
+                  style = wx.DEFAULT_FRAME_STYLE, name = ""):
+        plot.PlotCanvas.__init__ (self, parent, id, pos, size, style, name)
+
+        self.y_range = None
+        self.fftsink = fftsink
+        self.peak_hold = False
+        self.peak_vals = None
+
+        self.SetEnableGrid (True)
+        # self.SetEnableZoom (True)
+        # self.SetBackgroundColour ('black')
+        
+        self.build_popup_menu()
+        
+        EVT_DATA_EVENT (self, self.set_data)
+        wx.EVT_CLOSE (self, self.on_close_window)
+        self.Bind(wx.EVT_RIGHT_UP, self.on_right_click)
+
+        self.input_watcher = input_watcher(fftsink.msgq, fftsink.fft_size, 
self)
+
+
+    def on_close_window (self, event):
+        print "fft_window:on_close_window"
+        self.keep_running = False
+
+
+    def set_data (self, evt):
+        dB = evt.data
+        L = len (dB)
+
+        if self.peak_hold:
+            if self.peak_vals is None:
+                self.peak_vals = dB
+            else:
+                self.peak_vals = Numeric.maximum(dB, self.peak_vals)
+                dB = self.peak_vals
+
+        x = max(abs(self.fftsink.sample_rate), abs(self.fftsink.baseband_freq))
+        if x >= 1e9:
+            sf = 1e-9
+            units = "GHz"
+        elif x >= 1e6:
+            sf = 1e-6
+            units = "MHz"
+        else:
+            sf = 1e-3
+            units = "kHz"
+
+        if self.fftsink.input_is_real:     # only plot 1/2 the points
+            x_vals = ((Numeric.arrayrange (L/2)
+                       * (self.fftsink.sample_rate * sf / L))
+                      + self.fftsink.baseband_freq * sf)
+            points = Numeric.zeros((len(x_vals), 2), Numeric.Float64)
+            points[:,0] = x_vals
+            points[:,1] = dB[0:L/2]
+        else:
+            # the "negative freqs" are in the second half of the array
+            x_vals = ((Numeric.arrayrange (-L/2, L/2)
+                       * (self.fftsink.sample_rate * sf / L))
+                      + self.fftsink.baseband_freq * sf)
+            points = Numeric.zeros((len(x_vals), 2), Numeric.Float64)
+            points[:,0] = x_vals
+            points[:,1] = Numeric.concatenate ((dB[L/2:], dB[0:L/2]))
+
+
+        lines = plot.PolyLine (points, colour='BLUE')
+
+        graphics = plot.PlotGraphics ([lines],
+                                      title=self.fftsink.title,
+                                      xLabel = units, yLabel = "dB")
+
+        self.Draw (graphics, xAxis=None, yAxis=self.y_range)
+        self.update_y_range ()
+
+    def set_peak_hold(self, enable):
+        self.peak_hold = enable
+        self.peak_vals = None
+
+    def update_y_range (self):
+        ymax = self.fftsink.ref_level
+        ymin = self.fftsink.ref_level - self.fftsink.y_per_div * 
self.fftsink.y_divs
+        self.y_range = self._axisInterval ('min', ymin, ymax)
+
+    def on_average(self, evt):
+        # print "on_average"
+        self.fftsink.set_average(evt.IsChecked())
+
+    def on_peak_hold(self, evt):
+        # print "on_peak_hold"
+        self.fftsink.set_peak_hold(evt.IsChecked())
+
+    def on_incr_ref_level(self, evt):
+        # print "on_incr_ref_level"
+        self.fftsink.set_ref_level(self.fftsink.ref_level
+                                   + self.fftsink.y_per_div)
+
+    def on_decr_ref_level(self, evt):
+        # print "on_decr_ref_level"
+        self.fftsink.set_ref_level(self.fftsink.ref_level
+                                   - self.fftsink.y_per_div)
+
+    def on_incr_y_per_div(self, evt):
+        # print "on_incr_y_per_div"
+        self.fftsink.set_y_per_div(next_up(self.fftsink.y_per_div, 
(1,2,5,10,20)))
+
+    def on_decr_y_per_div(self, evt):
+        # print "on_decr_y_per_div"
+        self.fftsink.set_y_per_div(next_down(self.fftsink.y_per_div, 
(1,2,5,10,20)))
+
+    def on_y_per_div(self, evt):
+        # print "on_y_per_div"
+        Id = evt.GetId()
+        if Id == self.id_y_per_div_1:
+            self.fftsink.set_y_per_div(1)
+        elif Id == self.id_y_per_div_2:
+            self.fftsink.set_y_per_div(2)
+        elif Id == self.id_y_per_div_5:
+            self.fftsink.set_y_per_div(5)
+        elif Id == self.id_y_per_div_10:
+            self.fftsink.set_y_per_div(10)
+        elif Id == self.id_y_per_div_20:
+            self.fftsink.set_y_per_div(20)
+
+        
+    def on_right_click(self, event):
+        menu = self.popup_menu
+        for id, pred in self.checkmarks.items():
+            item = menu.FindItemById(id)
+            item.Check(pred())
+        self.PopupMenu(menu, event.GetPosition())
+
+
+    def build_popup_menu(self):
+        self.id_incr_ref_level = wx.NewId()
+        self.id_decr_ref_level = wx.NewId()
+        self.id_incr_y_per_div = wx.NewId()
+        self.id_decr_y_per_div = wx.NewId()
+        self.id_y_per_div_1 = wx.NewId()
+        self.id_y_per_div_2 = wx.NewId()
+        self.id_y_per_div_5 = wx.NewId()
+        self.id_y_per_div_10 = wx.NewId()
+        self.id_y_per_div_20 = wx.NewId()
+        self.id_average = wx.NewId()
+        self.id_peak_hold = wx.NewId()
+
+        self.Bind(wx.EVT_MENU, self.on_average, id=self.id_average)
+        self.Bind(wx.EVT_MENU, self.on_peak_hold, id=self.id_peak_hold)
+        self.Bind(wx.EVT_MENU, self.on_incr_ref_level, 
id=self.id_incr_ref_level)
+        self.Bind(wx.EVT_MENU, self.on_decr_ref_level, 
id=self.id_decr_ref_level)
+        self.Bind(wx.EVT_MENU, self.on_incr_y_per_div, 
id=self.id_incr_y_per_div)
+        self.Bind(wx.EVT_MENU, self.on_decr_y_per_div, 
id=self.id_decr_y_per_div)
+        self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_1)
+        self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_2)
+        self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_5)
+        self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_10)
+        self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_20)
+
+
+        # make a menu
+        menu = wx.Menu()
+        self.popup_menu = menu
+        menu.AppendCheckItem(self.id_average, "Average")
+        menu.AppendCheckItem(self.id_peak_hold, "Peak Hold")
+        menu.Append(self.id_incr_ref_level, "Incr Ref Level")
+        menu.Append(self.id_decr_ref_level, "Decr Ref Level")
+        # menu.Append(self.id_incr_y_per_div, "Incr dB/div")
+        # menu.Append(self.id_decr_y_per_div, "Decr dB/div")
+        menu.AppendSeparator()
+        # we'd use RadioItems for these, but they're not supported on Mac
+        menu.AppendCheckItem(self.id_y_per_div_1, "1 dB/div")
+        menu.AppendCheckItem(self.id_y_per_div_2, "2 dB/div")
+        menu.AppendCheckItem(self.id_y_per_div_5, "5 dB/div")
+        menu.AppendCheckItem(self.id_y_per_div_10, "10 dB/div")
+        menu.AppendCheckItem(self.id_y_per_div_20, "20 dB/div")
+
+        self.checkmarks = {
+            self.id_average : lambda : self.fftsink.average,
+            self.id_peak_hold : lambda : self.fftsink.peak_hold,
+            self.id_y_per_div_1 : lambda : self.fftsink.y_per_div == 1,
+            self.id_y_per_div_2 : lambda : self.fftsink.y_per_div == 2,
+            self.id_y_per_div_5 : lambda : self.fftsink.y_per_div == 5,
+            self.id_y_per_div_10 : lambda : self.fftsink.y_per_div == 10,
+            self.id_y_per_div_20 : lambda : self.fftsink.y_per_div == 20,
+            }
+
+
+def next_up(v, seq):
+    """
+    Return the first item in seq that is > v.
+    """
+    for s in seq:
+        if s > v:
+            return s
+    return v
+
+def next_down(v, seq):
+    """
+    Return the last item in seq that is < v.
+    """
+    rseq = list(seq[:])
+    rseq.reverse()
+
+    for s in rseq:
+        if s < v:
+            return s
+    return v
+
+
+# ----------------------------------------------------------------
+# Standalone test app
+# ----------------------------------------------------------------
+
+class test_app_block (stdgui2.std_top_block):
+    def __init__(self, frame, panel, vbox, argv):
+        stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
+
+        fft_size = 256
+
+        # build our flow graph
+        input_rate = 20.48e3
+
+        # Generate a complex sinusoid
+        #src1 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 2e3, 1)
+        src1 = gr.sig_source_c (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1)
+
+        # We add these throttle blocks so that this demo doesn't
+        # suck down all the CPU available.  Normally you wouldn't use these.
+        thr1 = gr.throttle(gr.sizeof_gr_complex, input_rate)
+
+        sink1 = fft_sink_c (panel, title="Complex Data", fft_size=fft_size,
+                            sample_rate=input_rate, baseband_freq=100e3,
+                            ref_level=0, y_per_div=20)
+        vbox.Add (sink1.win, 1, wx.EXPAND)
+
+        self.define_component("src1", src1)
+        self.define_component("thr1", thr1)
+        self.define_component("sink1", sink1)
+
+        self.connect ("src1", 0, "thr1", 0)
+        self.connect ("thr1", 0, "sink1", 0)
+
+        #src2 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 2e3, 1)
+        src2 = gr.sig_source_f (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1)
+        thr2 = gr.throttle(gr.sizeof_float, input_rate)
+        sink2 = fft_sink_f (panel, title="Real Data", fft_size=fft_size*2,
+                            sample_rate=input_rate, baseband_freq=100e3,
+                            ref_level=0, y_per_div=20)
+        vbox.Add (sink2.win, 1, wx.EXPAND)
+
+        self.define_component("src2", src2)
+        self.define_component("thr2", thr2)
+        self.define_component("sink2", sink2)
+        
+        self.connect ("src2", 0, "thr2", 0)
+        self.connect ("thr2", 0, "sink2", 0)
+
+def main ():
+    app = stdgui2.stdapp (test_app_block,
+                         "FFT Sink Test App")
+    app.MainLoop ()
+
+if __name__ == '__main__':
+    main ()

Copied: gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/stdgui2.py 
(from rev 4671, 
gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/stdgui.py)
===================================================================
--- gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/stdgui2.py     
                        (rev 0)
+++ gnuradio/branches/developers/jcorgan/est/gr-wxgui/src/python/stdgui2.py     
2007-03-01 16:08:47 UTC (rev 4673)
@@ -0,0 +1,95 @@
+#
+# Copyright 2004 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+'''A simple wx gui for GNU Radio applications'''
+
+import wx
+import sys
+from gnuradio import gr
+
+
+class stdapp (wx.App):
+    def __init__ (self, top_block_maker, title="GNU Radio", nstatus=2):
+        self.top_block_maker = top_block_maker
+        self.title = title
+        self._nstatus = nstatus
+        # All our initialization must come before calling wx.App.__init__.
+        # OnInit is called from somewhere in the guts of __init__.
+        wx.App.__init__ (self, redirect=False)
+
+    def OnInit (self):
+        frame = stdframe (self.top_block_maker, self.title, self._nstatus)
+        frame.Show (True)
+        self.SetTopWindow (frame)
+        return True
+
+
+class stdframe (wx.Frame):
+    def __init__ (self, top_block_maker, title="GNU Radio", nstatus=2):
+        # print "stdframe.__init__"
+        wx.Frame.__init__(self, None, -1, title)
+
+        self.CreateStatusBar (nstatus)
+        mainmenu = wx.MenuBar ()
+
+        menu = wx.Menu ()
+        item = menu.Append (200, 'E&xit', 'Exit')
+        self.Bind (wx.EVT_MENU, self.OnCloseWindow, item)
+        mainmenu.Append (menu, "&File")
+        self.SetMenuBar (mainmenu)
+
+        self.Bind (wx.EVT_CLOSE, self.OnCloseWindow)
+        self.panel = stdpanel (self, self, top_block_maker)
+        vbox = wx.BoxSizer(wx.VERTICAL)
+        vbox.Add(self.panel, 1, wx.EXPAND)
+        self.SetSizer(vbox)
+        self.SetAutoLayout(True)
+        vbox.Fit(self)
+
+    def OnCloseWindow (self, event):
+        self.runtime().stop()
+        self.Destroy ()
+
+    def runtime (self):
+        return self.panel.runtime
+    
+class stdpanel (wx.Panel):
+    def __init__ (self, parent, frame, top_block_maker):
+        # print "stdpanel.__init__"
+        wx.Panel.__init__ (self, parent, -1)
+        self.frame = frame
+
+        vbox = wx.BoxSizer (wx.VERTICAL)
+        self.top_block = top_block_maker (frame, self, vbox, sys.argv)
+        self.SetSizer (vbox)
+        self.SetAutoLayout (True)
+        vbox.Fit (self)
+
+        self.runtime = gr.runtime(self.top_block)
+        self.runtime.start ()
+
+class std_top_block (gr.hier_block2):
+    def __init__ (self, parent, panel, vbox, argv):
+        # Call the hier_block2 constructor
+        # Top blocks have no inputs and outputs
+        gr.hier_block2.__init__(self, "std_top_block",
+                                gr.io_signature(0,0,0),
+                                gr.io_signature(0,0,0))