Merged changeset r9241:9289 from jblum/glwxgui into trunk. Adds OpenGL versions of fftsink, waterfallsink, and scopesink, and new constsink. See README.gl for use. (Josh Blum)

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9290 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 25 insertions, 583 deletions

diff --git a/gr-wxgui/src/python/fftsink2.py b/gr-wxgui/src/python/fftsink2.py
index f4e9143f1..ad2a09c96 100755..100644
--- a/gr-wxgui/src/python/fftsink2.py
+++ b/gr-wxgui/src/python/fftsink2.py
@@ -1,603 +1,45 @@
-#!/usr/bin/env python
 #
-# Copyright 2003,2004,2005,2006,2007 Free Software Foundation, Inc.
-# 
+# Copyright 2008 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 3, 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 plot
-import numpy
-import threading
-import math    
-
-DIV_LEVELS = (1, 2, 5, 10, 20)
-
-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, 
-                 y_divs=8, 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_per_div=y_per_div
-        self.y_divs = y_divs
-        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)
-        else:
-            self.avg.set_taps(1.0)
-        self.win.peak_vals = None
-        
-    def set_peak_hold(self, enable):
-        self.peak_hold = enable
-        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, ref_scale=2.0,
-                 y_per_div=10, y_divs=8, 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, y_divs=y_divs, 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.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)))
-        
-        mywindow = window.blackmanharris(self.fft_size)
-        self.fft = gr.fft_vfc(self.fft_size, True, mywindow)
-        power = 0
-        for tap in mywindow:
-            power += tap*tap
-            
-        self.c2mag = gr.complex_to_mag(self.fft_size)
-        self.avg = gr.single_pole_iir_filter_ff(1.0, self.fft_size)
-
-        # FIXME  We need to add 3dB to all bins but the DC bin
-        self.log = gr.nlog10_ff(20, self.fft_size,
-                               -10*math.log10(self.fft_size)                # Adjust for number of bins
-                               -10*math.log10(power/self.fft_size)        # Adjust for windowing loss
-                               -20*math.log10(ref_scale/2))                # Adjust for reference scale
-                               
-        self.sink = gr.message_sink(gr.sizeof_float * self.fft_size, self.msgq, True)
-        self.connect(self, self.s2p, self.one_in_n, self.fft, self.c2mag, self.avg, self.log, self.sink)
-
-        self.win = fft_window(self, parent, size=size)
-        self.set_average(self.average)
-        self.set_peak_hold(self.peak_hold)
-
-class fft_sink_c(gr.hier_block2, fft_sink_base):
-    def __init__(self, parent, baseband_freq=0, ref_scale=2.0,
-                 y_per_div=10, y_divs=8, 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, y_divs=y_divs, 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.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)))
-        
-        mywindow = window.blackmanharris(self.fft_size)
-        self.fft = gr.fft_vcc(self.fft_size, True, mywindow)
-        power = 0
-        for tap in mywindow:
-            power += tap*tap
-            
-        self.c2mag = gr.complex_to_mag(self.fft_size)
-        self.avg = gr.single_pole_iir_filter_ff(1.0, self.fft_size)
-
-        # FIXME  We need to add 3dB to all bins but the DC bin
-        self.log = gr.nlog10_ff(20, self.fft_size,
-                                -10*math.log10(self.fft_size)                # Adjust for number of bins
-                                -10*math.log10(power/self.fft_size)        # Adjust for windowing loss
-                                -20*math.log10(ref_scale/2))                # Adjust for reference scale
-                                
-        self.sink = gr.message_sink(gr.sizeof_float * self.fft_size, self.msgq, True)
-        self.connect(self, self.s2p, self.one_in_n, self.fft, self.c2mag, self.avg, self.log, self.sink)
-
-        self.win = fft_window(self, parent, size=size)
-        self.set_average(self.average)
-        self.set_peak_hold(self.peak_hold)
-
-
-# ------------------------------------------------------------------------
-
-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 = numpy.fromstring (s, numpy.float32)
-            de = DataEvent (complex_data)
-            wx.PostEvent (self.event_receiver, de)
-            del de
-
-class control_panel(wx.Panel):
-    
-    class LabelText(wx.StaticText):    
-        def __init__(self, window, label):
-            wx.StaticText.__init__(self, window, -1, label)
-            font = self.GetFont()
-            font.SetWeight(wx.FONTWEIGHT_BOLD)
-            font.SetUnderlined(True)
-            self.SetFont(font)
-    
-    def __init__(self, parent):
-        self.parent = parent
-        wx.Panel.__init__(self, parent, -1, style=wx.SIMPLE_BORDER)    
-        control_box = wx.BoxSizer(wx.VERTICAL)
-        
-        #checkboxes for average and peak hold
-        control_box.AddStretchSpacer()
-        control_box.Add(self.LabelText(self, 'Options'), 0, wx.ALIGN_CENTER)
-        self.average_check_box = wx.CheckBox(parent=self, style=wx.CHK_2STATE, label="Average")
-        self.average_check_box.Bind(wx.EVT_CHECKBOX, parent.on_average)
-        control_box.Add(self.average_check_box, 0, wx.EXPAND)
-        self.peak_hold_check_box = wx.CheckBox(parent=self, style=wx.CHK_2STATE, label="Peak Hold")
-        self.peak_hold_check_box.Bind(wx.EVT_CHECKBOX, parent.on_peak_hold) 
-        control_box.Add(self.peak_hold_check_box, 0, wx.EXPAND)
-       
-        #radio buttons for div size
-        control_box.AddStretchSpacer()
-        control_box.Add(self.LabelText(self, 'Set dB/div'), 0, wx.ALIGN_CENTER)
-        radio_box = wx.BoxSizer(wx.VERTICAL)
-        self.radio_buttons = list()
-        for y_per_div in DIV_LEVELS:
-            radio_button = wx.RadioButton(self, -1, "%d dB/div"%y_per_div)
-            radio_button.Bind(wx.EVT_RADIOBUTTON, self.on_radio_button_change)
-            self.radio_buttons.append(radio_button)
-            radio_box.Add(radio_button, 0, wx.ALIGN_LEFT)
-        control_box.Add(radio_box, 0, wx.EXPAND)
-        
-        #ref lvl buttons
-        control_box.AddStretchSpacer()
-        control_box.Add(self.LabelText(self, 'Adj Ref Lvl'), 0, wx.ALIGN_CENTER)
-        control_box.AddSpacer(2)
-        button_box = wx.BoxSizer(wx.HORIZONTAL)        
-        self.ref_plus_button = wx.Button(self, -1, '+', style=wx.BU_EXACTFIT)
-        self.ref_plus_button.Bind(wx.EVT_BUTTON, parent.on_incr_ref_level)
-        button_box.Add(self.ref_plus_button, 0, wx.ALIGN_CENTER)
-        self.ref_minus_button = wx.Button(self, -1, ' - ', style=wx.BU_EXACTFIT)
-        self.ref_minus_button.Bind(wx.EVT_BUTTON, parent.on_decr_ref_level)
-        button_box.Add(self.ref_minus_button, 0, wx.ALIGN_CENTER)
-        control_box.Add(button_box, 0, wx.ALIGN_CENTER)
-        control_box.AddStretchSpacer()
-        #set sizer
-        self.SetSizerAndFit(control_box)
-        #update
-        self.update()
-        
-    def update(self):
-        """!
-        Read the state of the fft plot settings and update the control panel.
-        """
-        #update checkboxes
-        self.average_check_box.SetValue(self.parent.fftsink.average)
-        self.peak_hold_check_box.SetValue(self.parent.fftsink.peak_hold)
-        #update radio buttons    
-        try:
-            index = list(DIV_LEVELS).index(self.parent.fftsink.y_per_div)
-            self.radio_buttons[index].SetValue(True)
-        except: pass
-        
-    def on_radio_button_change(self, evt):
-        selected_radio_button = filter(lambda rb: rb.GetValue(), self.radio_buttons)[0] 
-        index = self.radio_buttons.index(selected_radio_button)
-        self.parent.fftsink.set_y_per_div(DIV_LEVELS[index])
-
-class fft_window (wx.Panel):
-    def __init__ (self, fftsink, parent, id = -1,
-                  pos = wx.DefaultPosition, size = wx.DefaultSize,
-                  style = wx.DEFAULT_FRAME_STYLE, name = ""):
-        
-        self.fftsink = fftsink
-        #init panel and plot 
-        wx.Panel.__init__(self, parent, -1)                  
-        self.plot = plot.PlotCanvas(self, id, pos, size, style, name)       
-        #setup the box with plot and controls
-        self.control_panel = control_panel(self)
-        main_box = wx.BoxSizer (wx.HORIZONTAL)
-        main_box.Add (self.plot, 1, wx.EXPAND)
-        main_box.Add (self.control_panel, 0, wx.EXPAND)
-        self.SetSizerAndFit(main_box)
-        
-        self.peak_hold = False
-        self.peak_vals = None
-        
-        self.plot.SetEnableGrid (True)
-        # self.SetEnableZoom (True)
-        # self.SetBackgroundColour ('black')
-        
-        self.build_popup_menu()
-        self.set_baseband_freq(0.0)
-                
-        EVT_DATA_EVENT (self, self.set_data)
-        wx.EVT_CLOSE (self, self.on_close_window)
-        self.plot.Bind(wx.EVT_RIGHT_UP, self.on_right_click)
-        self.plot.Bind(wx.EVT_MOTION, self.evt_motion)
-        
-        self.input_watcher = input_watcher(fftsink.msgq, fftsink.fft_size, self)
-
-    def set_scale(self, freq):
-        x = max(abs(self.fftsink.sample_rate), abs(self.fftsink.baseband_freq))        
-        if x >= 1e9:
-            self._scale_factor = 1e-9
-            self._units = "GHz"
-            self._format = "%3.6f"
-        elif x >= 1e6:
-            self._scale_factor = 1e-6
-            self._units = "MHz"
-            self._format = "%3.3f"
-        else:
-            self._scale_factor = 1e-3
-            self._units = "kHz"
-            self._format = "%3.3f"
-
-    def set_baseband_freq(self, baseband_freq):
-        if self.peak_hold:
-            self.peak_vals = None
-        self.set_scale(baseband_freq)
-        self.fftsink.set_baseband_freq(baseband_freq)
-        
-    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 = numpy.maximum(dB, self.peak_vals)
-
-        if self.fftsink.input_is_real:     # only plot 1/2 the points
-            x_vals = ((numpy.arange (L/2) * (self.fftsink.sample_rate 
-                       * self._scale_factor / L))
-                      + self.fftsink.baseband_freq * self._scale_factor)
-            self._points = numpy.zeros((len(x_vals), 2), numpy.float64)
-            self._points[:,0] = x_vals
-            self._points[:,1] = dB[0:L/2]
-            if self.peak_hold:
-                self._peak_points = numpy.zeros((len(x_vals), 2), numpy.float64)
-                self._peak_points[:,0] = x_vals
-                self._peak_points[:,1] = self.peak_vals[0:L/2]
-        else:
-            # the "negative freqs" are in the second half of the array
-            x_vals = ((numpy.arange (-L/2, L/2)
-                       * (self.fftsink.sample_rate * self._scale_factor / L))
-                      + self.fftsink.baseband_freq * self._scale_factor)
-            self._points = numpy.zeros((len(x_vals), 2), numpy.float64)
-            self._points[:,0] = x_vals
-            self._points[:,1] = numpy.concatenate ((dB[L/2:], dB[0:L/2]))
-            if self.peak_hold:
-                self._peak_points = numpy.zeros((len(x_vals), 2), numpy.float64)
-                self._peak_points[:,0] = x_vals
-                self._peak_points[:,1] = numpy.concatenate ((self.peak_vals[L/2:], self.peak_vals[0:L/2]))
-
-        lines = [plot.PolyLine (self._points, colour='BLUE'),]
-        if self.peak_hold:
-            lines.append(plot.PolyLine (self._peak_points, colour='GREEN'))
-
-        graphics = plot.PlotGraphics (lines,
-                                      title=self.fftsink.title,
-                                      xLabel = self._units, yLabel = "dB")
-        x_range = x_vals[0], x_vals[-1]
-        ymax = self.fftsink.ref_level
-        ymin = self.fftsink.ref_level - self.fftsink.y_per_div * self.fftsink.y_divs
-        y_range = ymin, ymax
-        self.plot.Draw (graphics, xAxis=x_range, yAxis=y_range, step=self.fftsink.y_per_div)        
-
-    def set_peak_hold(self, enable):
-        self.peak_hold = enable
-        self.peak_vals = None
-
-    def on_average(self, evt):
-        # print "on_average"
-        self.fftsink.set_average(evt.IsChecked())
-        self.control_panel.update()
-
-    def on_peak_hold(self, evt):
-        # print "on_peak_hold"
-        self.fftsink.set_peak_hold(evt.IsChecked())
-        self.control_panel.update()
-
-    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, DIV_LEVELS))
-        self.control_panel.update()
-
-    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, DIV_LEVELS))
-        self.control_panel.update()
-
-    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)
-        self.control_panel.update()
-
-    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.plot.PopupMenu(menu, event.GetPosition())
-
-    def evt_motion(self, event):
-        if not hasattr(self, "_points"):
-            return # Got here before first window data update
-            
-        # Clip to plotted values
-        (ux, uy) = self.plot.GetXY(event)      # Scaled position
-        x_vals = numpy.array(self._points[:,0])
-        if ux < x_vals[0] or ux > x_vals[-1]:
-            tip = self.GetToolTip()
-            if tip:
-                tip.Enable(False)
-            return
-
-        # Get nearest X value (is there a better way)?
-        ind = numpy.argmin(numpy.abs(x_vals-ux))
-        x_val = x_vals[ind]
-        db_val = self._points[ind, 1]
-        text = (self._format+" %s dB=%3.3f") % (x_val, self._units, db_val)
-
-        # Display the tooltip
-        tip = wx.ToolTip(text)
-        tip.Enable(True)
-        tip.SetDelay(0)
-        self.SetToolTip(tip)
-        
-    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.plot.Bind(wx.EVT_MENU, self.on_average, id=self.id_average)
-        self.plot.Bind(wx.EVT_MENU, self.on_peak_hold, id=self.id_peak_hold)
-        self.plot.Bind(wx.EVT_MENU, self.on_incr_ref_level, id=self.id_incr_ref_level)
-        self.plot.Bind(wx.EVT_MENU, self.on_decr_ref_level, id=self.id_decr_ref_level)
-        self.plot.Bind(wx.EVT_MENU, self.on_incr_y_per_div, id=self.id_incr_y_per_div)
-        self.plot.Bind(wx.EVT_MENU, self.on_decr_y_per_div, id=self.id_decr_y_per_div)
-        self.plot.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_1)
-        self.plot.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_2)
-        self.plot.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_5)
-        self.plot.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_10)
-        self.plot.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, y_divs=10)
-        vbox.Add (sink1.win, 1, wx.EXPAND)
+from gnuradio import gr
 
-        self.connect(src1, thr1, sink1)
+p = gr.prefs()
+style = p.get_string('wxgui', 'style', 'auto')
 
-        #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, y_divs=10)
-        vbox.Add (sink2.win, 1, wx.EXPAND)
+# In 3.2 we'll change 'auto' to mean 'gl' if possible, then fallback
+if style == 'auto':
+    style = 'nongl'
 
-        self.connect(src2, thr2, sink2)
+if style == 'nongl':
+    from fftsink_nongl import fft_sink_f, fft_sink_c
+elif style == 'gl':
+    try:
+        import wx
+        wx.glcanvas.GLCanvas
+    except AttributeError:
+        raise RuntimeError("wxPython doesn't support glcanvas")
 
-def main ():
-    app = stdgui2.stdapp (test_app_block, "FFT Sink Test App")
-    app.MainLoop ()
+    try:
+        from OpenGL.GL import *
+    except ImportError:
+        raise RuntimeError("Unable to import OpenGL. Are Python wrappers for OpenGL installed?")
 
-if __name__ == '__main__':
-    main ()
+    from fftsink_gl import fft_sink_f, fft_sink_c