Adding the display sink by Martin Dvh

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4499 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 614 insertions, 0 deletions

diff --git a/gr-wxgui/src/python/numbersink.py b/gr-wxgui/src/python/numbersink.py
new file mode 100644
index 000000000..b6319a3e8
--- /dev/null
+++ b/gr-wxgui/src/python/numbersink.py
@@ -0,0 +1,614 @@
+#!/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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+# 
+
+from gnuradio import gr, gru, window
+from gnuradio.wxgui import stdgui
+import wx
+#from wx import StaticText
+import gnuradio.wxgui.plot as plot
+import Numeric
+import threading
+import math    
+
+default_numbersink_size = (640,240)
+default_number_rate = gr.prefs().get_long('wxgui', 'number_rate', 15)
+
+class number_sink_base(object):
+    def __init__(self, input_is_real=False, unit='',base_value=0, minval=-100.0,maxval=100.0,factor=1.0,decimal_places=10, ref_level=50,
+                 sample_rate=1, 
+                 number_rate=default_number_rate,
+                 average=False, avg_alpha=None, label='', peak_hold=False):
+
+        # initialize common attributes
+        self.unit=unit
+        self.base_value = base_value
+        self.minval=minval
+        self.maxval=maxval
+        self.factor=factor
+        self.y_divs = 8
+        self.decimal_places=decimal_places
+        self.ref_level = ref_level
+        self.sample_rate = sample_rate
+        number_size=1
+        self.number_size = number_size
+        self.number_rate = number_rate
+        self.average = average
+        if avg_alpha is None:
+            self.avg_alpha = 2.0 / number_rate
+        else:
+            self.avg_alpha = avg_alpha
+        self.label = label
+        self.peak_hold = peak_hold
+        self.show_gauge = True
+        self.input_is_real = input_is_real
+        self.msgq = gr.msg_queue(2)         # queue that holds a maximum of 2 messages
+
+    def set_decimal_places(self, decimal_places):
+        self.decimal_places = decimal_places
+
+    def set_ref_level(self, ref_level):
+        self.ref_level = ref_level
+
+    def print_current_value(self, comment):
+        print comment,self.win.current_value
+
+    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_show_gauge(self, enable):
+        self.show_gauge = enable
+        self.win.set_show_gauge(enable)
+
+    def set_avg_alpha(self, avg_alpha):
+        self.avg_alpha = avg_alpha
+
+    def set_base_value(self, base_value):
+        self.base_value = base_value
+        
+
+class number_sink_f(gr.hier_block, number_sink_base):
+    def __init__(self, fg, parent, unit='',base_value=0,minval=-100.0,maxval=100.0,factor=1.0,
+                 decimal_places=10, ref_level=50, sample_rate=1, #number_size=512,
+                 number_rate=default_number_rate, average=False, avg_alpha=None,
+                 label='', size=default_numbersink_size, peak_hold=False):
+
+        number_sink_base.__init__(self, unit=unit, input_is_real=True, base_value=base_value,
+                               minval=minval,maxval=maxval,factor=factor,
+                               decimal_places=decimal_places, ref_level=ref_level,
+                               sample_rate=sample_rate, #number_size=number_size,
+                               number_rate=number_rate,
+                               average=average, avg_alpha=avg_alpha, label=label,
+                               peak_hold=peak_hold)
+         
+        number_size=1                      
+        #s2p = gr.stream_to_vector(gr.sizeof_float, number_size)
+        one_in_n = gr.keep_one_in_n(gr.sizeof_float,
+                                    max(1, int(sample_rate/number_rate)))
+
+            
+        #c2mag = gr.complex_to_mag(number_size)
+        self.avg = gr.single_pole_iir_filter_ff(1.0, number_size)
+
+        # FIXME  We need to add 3dB to all bins but the DC bin
+        #log = gr.nlog10_ff(20, number_size,
+        #                   -20*math.log10(number_size)-10*math.log10(power/number_size))
+        sink = gr.message_sink(gr.sizeof_float , self.msgq, True)
+
+        #fg.connect (s2p, one_in_n, fft, c2mag, self.avg, log, sink)
+        fg.connect(self.avg,one_in_n,sink)
+        gr.hier_block.__init__(self, fg, self.avg, sink)
+        self.win = number_window(self, parent, size=size,label=label)
+        self.set_average(self.average)
+
+
+class number_sink_c(gr.hier_block, number_sink_base):
+    def __init__(self, fg, parent, unit='',base_value=0,minval=-100.0,maxval=100.0,factor=1.0,
+                 decimal_places=10, ref_level=50, sample_rate=1, #number_size=512,
+                 number_rate=default_number_rate, average=False, avg_alpha=None,
+                 label='', size=default_numbersink_size, peak_hold=False):
+
+        number_sink_base.__init__(self, unit=unit, input_is_real=False, base_value=base_value,factor=factor,
+                               minval=minval,maxval=maxval,decimal_places=decimal_places, ref_level=ref_level,
+                               sample_rate=sample_rate, #number_size=number_size,
+                               number_rate=number_rate,
+                               average=average, avg_alpha=avg_alpha, label=label,
+                               peak_hold=peak_hold)
+
+        number_size=1                      
+        one_in_n = gr.keep_one_in_n(gr.sizeof_gr_complex,
+                                    max(1, int(sample_rate/number_rate)))
+
+            
+        #c2mag = gr.complex_to_mag(number_size)
+        self.avg = gr.single_pole_iir_filter_cc(1.0, number_size)
+
+        # FIXME  We need to add 3dB to all bins but the DC bin
+        #log = gr.nlog10_ff(20, number_size,
+        #                   -20*math.log10(number_size)-10*math.log10(power/number_size))
+        sink = gr.message_sink(gr.sizeof_gr_complex , self.msgq, True)
+
+        #fg.connect (s2p, one_in_n, fft, c2mag, self.avg, log, sink)
+        fg.connect(self.avg,one_in_n,sink)
+        gr.hier_block.__init__(self, fg, self.avg, sink)
+        self.win = number_window(self, parent, size=size,label=label)
+        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, number_size, event_receiver, **kwds):
+        threading.Thread.__init__ (self, **kwds)
+        self.setDaemon (1)
+        self.msgq = msgq
+        self.number_size = number_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 number 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 static_text_window (wx.StaticText): #plot.PlotCanvas):
+    def __init__ (self, parent, numbersink,id = -1,label="number",
+                  pos = wx.DefaultPosition, size = wx.DefaultSize,
+                  style = wx.DEFAULT_FRAME_STYLE, name = ""):
+        #plot.PlotCanvas.__init__ (self, parent, id, pos, size, style, name)
+        wx.StaticText.__init__(self, parent, id, label, pos, size, style, name)
+        #self.static_text=wx.StaticText( parent, id, label, pos, (size[0]/2,size[1]/2), style, name)
+        #gauge_style = wx.GA_HORIZONTAL
+        #self.gauge=wx.Gauge( parent, id, range=1000, pos=(pos[0],pos[1]+size[1]/2),size=(size[0]/2,size[1]/2), style=gauge_style,  name = "gauge")
+        #wx.BoxSizer.__init__ (self,wx.VERTICAL)
+        #self.Add (self.static_text, 0, wx.EXPAND)
+        #self.Add (self.gauge, 1, wx.EXPAND)
+        self.parent=parent
+        self.label=label
+        #self.y_range = None
+        self.numbersink = numbersink
+        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.Bind(wx.EVT_RIGHT_UP, self.on_right_click)
+
+        #self.input_watcher = input_watcher(numbersink.msgq, numbersink.number_size, self)
+
+
+    def on_close_window (self, event):
+        print "number_window:on_close_window"
+        self.keep_running = False
+
+
+    def set_peak_hold(self, enable):
+        self.peak_hold = enable
+        self.peak_vals = None
+
+    def update_y_range (self):
+        ymax = self.numbersink.ref_level
+        ymin = self.numbersink.ref_level - self.numbersink.decimal_places * self.numbersink.y_divs
+        self.y_range = self._axisInterval ('min', ymin, ymax)
+
+    def on_average(self, evt):
+        # print "on_average"
+        self.numbersink.set_average(evt.IsChecked())
+
+    def on_peak_hold(self, evt):
+        # print "on_peak_hold"
+        self.numbersink.set_peak_hold(evt.IsChecked())
+
+    def on_show_gauge(self, evt):
+        # print "on_show_gauge"
+        #if evt.IsChecked():
+        self.numbersink.set_show_gauge(evt.IsChecked())
+        print evt.IsChecked()
+        #  print "show gauge"
+        #else:
+        #  self.parent.gauge.Hide()
+        #  print "hide gauge"
+
+    def on_incr_ref_level(self, evt):
+        # print "on_incr_ref_level"
+        self.numbersink.set_ref_level(self.numbersink.ref_level
+                                   + self.numbersink.decimal_places)
+
+    def on_decr_ref_level(self, evt):
+        # print "on_decr_ref_level"
+        self.numbersink.set_ref_level(self.numbersink.ref_level
+                                   - self.numbersink.decimal_places)
+
+    def on_incr_decimal_places(self, evt):
+        # print "on_incr_decimal_places"
+        self.numbersink.set_decimal_places(self.numbersink.decimal_places+1) #next_up(self.numbersink.decimal_places, (1,2,5,10,20)))
+
+    def on_decr_decimal_places(self, evt):
+        # print "on_decr_decimal_places"
+        self.numbersink.set_decimal_places(max(self.numbersink.decimal_places-1,0)) #next_down(self.numbersink.decimal_places, (1,2,5,10,20)))
+
+    def on_decimal_places(self, evt):
+        # print "on_decimal_places"
+        Id = evt.GetId()
+        if Id == self.id_decimal_places_0:
+            self.numbersink.set_decimal_places(0)
+        elif Id == self.id_decimal_places_1:
+            self.numbersink.set_decimal_places(1)
+        elif Id == self.id_decimal_places_2:
+            self.numbersink.set_decimal_places(2)
+        elif Id == self.id_decimal_places_3:
+            self.numbersink.set_decimal_places(3)
+        elif Id == self.id_decimal_places_6:
+            self.numbersink.set_decimal_places(6)
+        elif Id == self.id_decimal_places_9:
+            self.numbersink.set_decimal_places(9)
+
+        
+    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_hide_gauge = wx.NewId()
+        self.id_show_gauge = wx.NewId()
+        self.id_incr_ref_level = wx.NewId()
+        self.id_decr_ref_level = wx.NewId()
+        self.id_incr_decimal_places = wx.NewId()
+        self.id_decr_decimal_places = wx.NewId()
+        self.id_decimal_places_0 = wx.NewId()
+        self.id_decimal_places_1 = wx.NewId()
+        self.id_decimal_places_2 = wx.NewId()
+        self.id_decimal_places_3 = wx.NewId()
+        self.id_decimal_places_6 = wx.NewId()
+        self.id_decimal_places_9 = 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_hide_gauge, id=self.id_hide_gauge)
+        self.Bind(wx.EVT_MENU, self.on_show_gauge, id=self.id_show_gauge)
+        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_decimal_places, id=self.id_incr_decimal_places)
+        self.Bind(wx.EVT_MENU, self.on_decr_decimal_places, id=self.id_decr_decimal_places)
+        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_0)
+        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_1)
+        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_2)
+        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_3)
+        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_6)
+        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_9)
+
+
+        # 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_hide_gauge, "Hide gauge")
+        menu.AppendCheckItem(self.id_show_gauge, "Show gauge")
+        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_decimal_places, "Incr decimal places")
+        menu.Append(self.id_decr_decimal_places, "Decr decimal places")
+        menu.AppendSeparator()
+        # we'd use RadioItems for these, but they're not supported on Mac
+        menu.AppendCheckItem(self.id_decimal_places_0, "0 decimal places")
+        menu.AppendCheckItem(self.id_decimal_places_1, "1 decimal places")
+        menu.AppendCheckItem(self.id_decimal_places_2, "2 decimal places")
+        menu.AppendCheckItem(self.id_decimal_places_3, "3 decimal places")
+        menu.AppendCheckItem(self.id_decimal_places_6, "6 decimal places")
+        menu.AppendCheckItem(self.id_decimal_places_9, "9 decimal places")
+
+        self.checkmarks = {
+            self.id_average : lambda : self.numbersink.average,
+            self.id_peak_hold : lambda : self.numbersink.peak_hold,#            self.id_hide_gauge : lambda : self.numbersink.hide_gauge,
+            self.id_show_gauge : lambda : self.numbersink.show_gauge,
+            self.id_decimal_places_0 : lambda : self.numbersink.decimal_places == 0,
+            self.id_decimal_places_1 : lambda : self.numbersink.decimal_places == 1,
+            self.id_decimal_places_2 : lambda : self.numbersink.decimal_places == 2,
+            self.id_decimal_places_3 : lambda : self.numbersink.decimal_places == 3,
+            self.id_decimal_places_6 : lambda : self.numbersink.decimal_places == 6,
+            self.id_decimal_places_9 : lambda : self.numbersink.decimal_places == 9,
+            }
+
+
+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
+
+
+#========================================================================================
+class number_window (plot.PlotCanvas):
+    def __init__ (self, numbersink, parent, id = -1,label="number",
+                  pos = wx.DefaultPosition, size = wx.DefaultSize,
+                  style = wx.DEFAULT_FRAME_STYLE, name = ""):
+        plot.PlotCanvas.__init__ (self, parent, id, pos, size, style, name)
+        #wx.StaticText.__init__(self, parent, id, label, pos, (size[0]/2,size[1]/2), style, name)
+        #print 'parent',parent
+        self.static_text=static_text_window( self, numbersink,id, label, pos, (size[0]/2,size[1]/2), style, name)
+        gauge_style = wx.GA_HORIZONTAL
+        vbox=wx.BoxSizer(wx.VERTICAL)
+        vbox.Add (self.static_text, 0, wx.EXPAND)
+        self.current_value=None
+        if numbersink.input_is_real:
+          self.gauge=wx.Gauge( self, id, range=1000, pos=(pos[0],pos[1]+size[1]/2),size=(size[0]/2,size[1]/2), style=gauge_style,  name = "gauge")
+          vbox.Add (self.gauge, 1, wx.EXPAND)
+        else:
+          self.gauge=wx.Gauge( self, id, range=1000, pos=(pos[0],pos[1]+size[1]/3),size=(size[0]/2,size[1]/3), style=gauge_style,  name = "gauge")
+          #hbox=wx.BoxSizer(wx.HORIZONTAL)
+          self.gauge_imag=wx.Gauge( self, id, range=1000, pos=(pos[0],pos[1]+size[1]*2/3),size=(size[0]/2,size[1]/3), style=gauge_style,  name = "gauge_imag")
+          vbox.Add (self.gauge, 1, wx.EXPAND)
+          vbox.Add (self.gauge_imag, 1, wx.EXPAND)
+          #vbox.Add (hbox, 1, wx.EXPAND)
+        self.sizer = vbox
+        self.SetSizer (self.sizer)
+        self.SetAutoLayout (True)
+        self.sizer.Fit (self)
+
+        self.label=label
+        #self.y_range = None
+        self.numbersink = numbersink
+        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.Bind(wx.EVT_RIGHT_UP, self.on_right_click)
+
+        self.input_watcher = input_watcher(numbersink.msgq, numbersink.number_size, self)
+
+
+    def on_close_window (self, event):
+        print "number_window:on_close_window"
+        self.keep_running = False
+
+    def set_show_gauge(self, enable):
+        self.show_gauge = enable
+        if enable:
+          self.gauge.Show()
+          if not self.numbersink.input_is_real:
+            self.gauge_imag.Show()
+          #print 'show'
+        else:
+          self.gauge.Hide()
+          if not self.numbersink.input_is_real:
+            self.gauge_imag.Hide()
+          #print 'hide'
+
+    def set_data (self, evt):
+        numbers = evt.data
+        L = len (numbers)
+
+        if self.peak_hold:
+            if self.peak_vals is None:
+                self.peak_vals = numbers
+            else:
+                self.peak_vals = Numeric.maximum(numbers, self.peak_vals)
+                numbers = self.peak_vals
+
+        if self.numbersink.input_is_real:
+            real_value=numbers[0]*self.numbersink.factor + self.numbersink.base_value
+            imag_value=0.0
+            self.current_value=real_value
+        else:
+            real_value=numbers[0]*self.numbersink.factor + self.numbersink.base_value
+            imag_value=numbers[1]*self.numbersink.factor + self.numbersink.base_value
+            self.current_value=complex(real_value,imag_value)
+        #x = max(abs(self.numbersink.sample_rate), abs(self.numbersink.base_value))
+        x = max(real_value, imag_value)
+        if x >= 1e9:
+            sf = 1e-9
+            unit_prefix = "G"
+        elif x >= 1e6:
+            sf = 1e-6
+            unit_prefix = "M"
+        elif x>= 1e3:
+            sf = 1e-3
+            unit_prefix = "k"
+        else :
+            sf = 1
+            unit_prefix = ""
+        #self.update_y_range ()
+        if self.numbersink.input_is_real:
+          showtext = "%s: %.*f %s%s" % (self.label, self.numbersink.decimal_places,real_value*sf,unit_prefix,self.numbersink.unit)
+        else:
+          showtext = "%s: %.*f,%.*f %s%s" % (self.label, self.numbersink.decimal_places,real_value*sf,
+                                                       self.numbersink.decimal_places,imag_value*sf,unit_prefix,self.numbersink.unit)
+        self.static_text.SetLabel(showtext)
+        #print (int(float((real_value-self.numbersink.base_value)*1000.0/(self.numbersink.maxval-self.numbersink.minval)))+500)
+        self.gauge.SetValue(int(float((real_value-self.numbersink.base_value)*1000.0/(self.numbersink.maxval-self.numbersink.minval)))+500)
+        if not self.numbersink.input_is_real:
+          self.gauge.SetValue(int(float((imag_value-self.numbersink.base_value)*1000.0/(self.numbersink.maxval-self.numbersink.minval)))+500)
+
+    def set_peak_hold(self, enable):
+        self.peak_hold = enable
+        self.peak_vals = None
+
+    def update_y_range (self):
+        ymax = self.numbersink.ref_level
+        ymin = self.numbersink.ref_level - self.numbersink.decimal_places * self.numbersink.y_divs
+        self.y_range = self._axisInterval ('min', ymin, ymax)
+
+    def on_average(self, evt):
+        # print "on_average"
+        self.numbersink.set_average(evt.IsChecked())
+
+    def on_peak_hold(self, evt):
+        # print "on_peak_hold"
+        self.numbersink.set_peak_hold(evt.IsChecked())
+
+
+
+
+
+
+
+
+
+
+# ----------------------------------------------------------------
+#          	      Deprecated interfaces
+# ----------------------------------------------------------------
+
+# returns (block, win).
+#   block requires a single input stream of float
+#   win is a subclass of wxWindow
+
+def make_number_sink_f(fg, parent, label, number_size, input_rate, ymin = 0, ymax=50):
+    
+    block = number_sink_f(fg, parent, label=label, number_size=number_size, sample_rate=input_rate,
+                       decimal_places=(ymax - ymin)/8, ref_level=ymax)
+    return (block, block.win)
+
+# returns (block, win).
+#   block requires a single input stream of gr_complex
+#   win is a subclass of wxWindow
+
+def make_number_sink_c(fg, parent, label, number_size, input_rate, ymin=0, ymax=50):
+    block = number_sink_c(fg, parent, label=label, number_size=number_size, sample_rate=input_rate,
+                       decimal_places=(ymax - ymin)/8, ref_level=ymax)
+    return (block, block.win)
+
+
+# ----------------------------------------------------------------
+# Standalone test app
+# ----------------------------------------------------------------
+
+class test_app_flow_graph (stdgui.gui_flow_graph):
+    def __init__(self, frame, panel, vbox, argv):
+        stdgui.gui_flow_graph.__init__ (self, frame, panel, vbox, argv)
+
+        #number_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 = number_sink_c (self, panel, label="Complex Data", number_size=number_size,
+        #                    sample_rate=input_rate, base_value=100e3,
+        #                    ref_level=0, decimal_places=3)
+        #vbox.Add (sink1.win, 1, wx.EXPAND)
+        #self.connect (src1, thr1, sink1)
+
+        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 = number_sink_f (self, panel, unit='Hz',label="Real Data", avg_alpha=0.001,#number_size=number_size*2,
+                            sample_rate=input_rate, base_value=100e3,
+                            ref_level=0, decimal_places=3)
+        vbox.Add (sink2.win, 1, wx.EXPAND)
+        sink3 = number_sink_c (self, panel, unit='V',label="Complex Data", avg_alpha=0.001,#number_size=number_size*2,
+                            sample_rate=input_rate, base_value=0,
+                            ref_level=0, decimal_places=3)
+        vbox.Add (sink3.win, 1, wx.EXPAND)
+        self.connect (src2, thr2, sink2)
+        self.connect (src1, thr1, sink3)
+def main ():
+    app = stdgui.stdapp (test_app_flow_graph,
+                         "Number Sink Test App")
+    app.MainLoop ()
+
+if __name__ == '__main__':
+    main ()