From a80c0f4969a994655ccb18c55f8ce936abcc61f7 Mon Sep 17 00:00:00 2001
From: Ben Reynwar <ben@reynwar.net>
Date: Fri, 8 Mar 2013 20:30:47 -0700
Subject: wxgui: Enabling uninstalled python imports.
---
gr-wxgui/python/wxgui/fft_window.py | 411 ++++++++++++++++++++++++++++++++++++
1 file changed, 411 insertions(+)
create mode 100644 gr-wxgui/python/wxgui/fft_window.py
(limited to 'gr-wxgui/python/wxgui/fft_window.py')
diff --git a/gr-wxgui/python/wxgui/fft_window.py b/gr-wxgui/python/wxgui/fft_window.py
new file mode 100644
index 0000000000..ada926c418
--- /dev/null
+++ b/gr-wxgui/python/wxgui/fft_window.py
@@ -0,0 +1,411 @@
+#
+# Copyright 2008, 2009, 2010 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.
+#
+
+##################################################
+# Imports
+##################################################
+import plotter
+import common
+import wx
+import numpy
+import math
+import pubsub
+from constants import *
+from gnuradio import gr #for gr.prefs
+import forms
+
+##################################################
+# Constants
+##################################################
+SLIDER_STEPS = 100
+AVG_ALPHA_MIN_EXP, AVG_ALPHA_MAX_EXP = -3, 0
+PERSIST_ALPHA_MIN_EXP, PERSIST_ALPHA_MAX_EXP = -2, 0
+DEFAULT_WIN_SIZE = (600, 300)
+DEFAULT_FRAME_RATE = gr.prefs().get_long('wxgui', 'fft_rate', 30)
+DB_DIV_MIN, DB_DIV_MAX = 1, 20
+FFT_PLOT_COLOR_SPEC = (0.3, 0.3, 1.0)
+PEAK_VALS_COLOR_SPEC = (0.0, 0.8, 0.0)
+EMPTY_TRACE = list()
+TRACES = ('A', 'B')
+TRACES_COLOR_SPEC = {
+ 'A': (1.0, 0.0, 0.0),
+ 'B': (0.8, 0.0, 0.8),
+}
+
+##################################################
+# FFT window control panel
+##################################################
+class control_panel(wx.Panel):
+ """
+ A control panel with wx widgits to control the plotter and fft block chain.
+ """
+
+ def __init__(self, parent):
+ """
+ Create a new control panel.
+
+ Args:
+ parent: the wx parent window
+ """
+ self.parent = parent
+ wx.Panel.__init__(self, parent, style=wx.SUNKEN_BORDER)
+ parent[SHOW_CONTROL_PANEL_KEY] = True
+ parent.subscribe(SHOW_CONTROL_PANEL_KEY, self.Show)
+ control_box = wx.BoxSizer(wx.VERTICAL)
+ control_box.AddStretchSpacer()
+ #checkboxes for average and peak hold
+ options_box = forms.static_box_sizer(
+ parent=self, sizer=control_box, label='Trace Options',
+ bold=True, orient=wx.VERTICAL,
+ )
+ forms.check_box(
+ sizer=options_box, parent=self, label='Peak Hold',
+ ps=parent, key=PEAK_HOLD_KEY,
+ )
+ forms.check_box(
+ sizer=options_box, parent=self, label='Average',
+ ps=parent, key=AVERAGE_KEY,
+ )
+ #static text and slider for averaging
+ avg_alpha_text = forms.static_text(
+ sizer=options_box, parent=self, label='Avg Alpha',
+ converter=forms.float_converter(lambda x: '%.4f'%x),
+ ps=parent, key=AVG_ALPHA_KEY, width=50,
+ )
+ avg_alpha_slider = forms.log_slider(
+ sizer=options_box, parent=self,
+ min_exp=AVG_ALPHA_MIN_EXP,
+ max_exp=AVG_ALPHA_MAX_EXP,
+ num_steps=SLIDER_STEPS,
+ ps=parent, key=AVG_ALPHA_KEY,
+ )
+ for widget in (avg_alpha_text, avg_alpha_slider):
+ parent.subscribe(AVERAGE_KEY, widget.Enable)
+ widget.Enable(parent[AVERAGE_KEY])
+ parent.subscribe(AVERAGE_KEY, widget.ShowItems)
+ #allways show initially, so room is reserved for them
+ widget.ShowItems(True) # (parent[AVERAGE_KEY])
+
+ parent.subscribe(AVERAGE_KEY, self._update_layout)
+
+ forms.check_box(
+ sizer=options_box, parent=self, label='Persistence',
+ ps=parent, key=USE_PERSISTENCE_KEY,
+ )
+ #static text and slider for persist alpha
+ persist_alpha_text = forms.static_text(
+ sizer=options_box, parent=self, label='Persist Alpha',
+ converter=forms.float_converter(lambda x: '%.4f'%x),
+ ps=parent, key=PERSIST_ALPHA_KEY, width=50,
+ )
+ persist_alpha_slider = forms.log_slider(
+ sizer=options_box, parent=self,
+ min_exp=PERSIST_ALPHA_MIN_EXP,
+ max_exp=PERSIST_ALPHA_MAX_EXP,
+ num_steps=SLIDER_STEPS,
+ ps=parent, key=PERSIST_ALPHA_KEY,
+ )
+ for widget in (persist_alpha_text, persist_alpha_slider):
+ parent.subscribe(USE_PERSISTENCE_KEY, widget.Enable)
+ widget.Enable(parent[USE_PERSISTENCE_KEY])
+ parent.subscribe(USE_PERSISTENCE_KEY, widget.ShowItems)
+ #allways show initially, so room is reserved for them
+ widget.ShowItems(True) # (parent[USE_PERSISTENCE_KEY])
+
+ parent.subscribe(USE_PERSISTENCE_KEY, self._update_layout)
+
+ #trace menu
+ for trace in TRACES:
+ trace_box = wx.BoxSizer(wx.HORIZONTAL)
+ options_box.Add(trace_box, 0, wx.EXPAND)
+ forms.check_box(
+ sizer=trace_box, parent=self,
+ ps=parent, key=TRACE_SHOW_KEY+trace,
+ label='Trace %s'%trace,
+ )
+ trace_box.AddSpacer(10)
+ forms.single_button(
+ sizer=trace_box, parent=self,
+ ps=parent, key=TRACE_STORE_KEY+trace,
+ label='Store', style=wx.BU_EXACTFIT,
+ )
+ trace_box.AddSpacer(10)
+ #radio buttons for div size
+ control_box.AddStretchSpacer()
+ y_ctrl_box = forms.static_box_sizer(
+ parent=self, sizer=control_box, label='Axis Options',
+ bold=True, orient=wx.VERTICAL,
+ )
+ forms.incr_decr_buttons(
+ parent=self, sizer=y_ctrl_box, label='dB/Div',
+ on_incr=self._on_incr_db_div, on_decr=self._on_decr_db_div,
+ )
+ #ref lvl buttons
+ forms.incr_decr_buttons(
+ parent=self, sizer=y_ctrl_box, label='Ref Level',
+ on_incr=self._on_incr_ref_level, on_decr=self._on_decr_ref_level,
+ )
+ y_ctrl_box.AddSpacer(2)
+ #autoscale
+ forms.single_button(
+ sizer=y_ctrl_box, parent=self, label='Autoscale',
+ callback=self.parent.autoscale,
+ )
+ #run/stop
+ control_box.AddStretchSpacer()
+ forms.toggle_button(
+ sizer=control_box, parent=self,
+ true_label='Stop', false_label='Run',
+ ps=parent, key=RUNNING_KEY,
+ )
+ #set sizer
+ self.SetSizerAndFit(control_box)
+
+ #mouse wheel event
+ def on_mouse_wheel(event):
+ if event.GetWheelRotation() < 0: self._on_incr_ref_level(event)
+ else: self._on_decr_ref_level(event)
+ parent.plotter.Bind(wx.EVT_MOUSEWHEEL, on_mouse_wheel)
+
+ ##################################################
+ # Event handlers
+ ##################################################
+ def _on_incr_ref_level(self, event):
+ self.parent[REF_LEVEL_KEY] = self.parent[REF_LEVEL_KEY] + self.parent[Y_PER_DIV_KEY]
+ def _on_decr_ref_level(self, event):
+ self.parent[REF_LEVEL_KEY] = self.parent[REF_LEVEL_KEY] - self.parent[Y_PER_DIV_KEY]
+ def _on_incr_db_div(self, event):
+ self.parent[Y_PER_DIV_KEY] = min(DB_DIV_MAX, common.get_clean_incr(self.parent[Y_PER_DIV_KEY]))
+ def _on_decr_db_div(self, event):
+ self.parent[Y_PER_DIV_KEY] = max(DB_DIV_MIN, common.get_clean_decr(self.parent[Y_PER_DIV_KEY]))
+ ##################################################
+ # subscriber handlers
+ ##################################################
+ def _update_layout(self,key):
+ # Just ignore the key value we get
+ # we only need to now that the visability or size of something has changed
+ self.parent.Layout()
+ #self.parent.Fit()
+
+##################################################
+# FFT window with plotter and control panel
+##################################################
+class fft_window(wx.Panel, pubsub.pubsub):
+ def __init__(
+ self,
+ parent,
+ controller,
+ size,
+ title,
+ real,
+ fft_size,
+ baseband_freq,
+ sample_rate_key,
+ y_per_div,
+ y_divs,
+ ref_level,
+ average_key,
+ avg_alpha_key,
+ peak_hold,
+ msg_key,
+ use_persistence,
+ persist_alpha,
+ ):
+
+ pubsub.pubsub.__init__(self)
+ #setup
+ self.samples = EMPTY_TRACE
+ self.real = real
+ self.fft_size = fft_size
+ self._reset_peak_vals()
+ self._traces = dict()
+ #proxy the keys
+ self.proxy(MSG_KEY, controller, msg_key)
+ self.proxy(AVERAGE_KEY, controller, average_key)
+ self.proxy(AVG_ALPHA_KEY, controller, avg_alpha_key)
+ self.proxy(SAMPLE_RATE_KEY, controller, sample_rate_key)
+ #initialize values
+ self[PEAK_HOLD_KEY] = peak_hold
+ self[Y_PER_DIV_KEY] = y_per_div
+ self[Y_DIVS_KEY] = y_divs
+ self[X_DIVS_KEY] = 8 #approximate
+ self[REF_LEVEL_KEY] = ref_level
+ self[BASEBAND_FREQ_KEY] = baseband_freq
+ self[RUNNING_KEY] = True
+ self[USE_PERSISTENCE_KEY] = use_persistence
+ self[PERSIST_ALPHA_KEY] = persist_alpha
+ for trace in TRACES:
+ #a function that returns a function
+ #so the function wont use local trace
+ def new_store_trace(my_trace):
+ def store_trace(*args):
+ self._traces[my_trace] = self.samples
+ self.update_grid()
+ return store_trace
+ def new_toggle_trace(my_trace):
+ def toggle_trace(toggle):
+ #do an automatic store if toggled on and empty trace
+ if toggle and not len(self._traces[my_trace]):
+ self._traces[my_trace] = self.samples
+ self.update_grid()
+ return toggle_trace
+ self._traces[trace] = EMPTY_TRACE
+ self[TRACE_STORE_KEY+trace] = False
+ self[TRACE_SHOW_KEY+trace] = False
+ self.subscribe(TRACE_STORE_KEY+trace, new_store_trace(trace))
+ self.subscribe(TRACE_SHOW_KEY+trace, new_toggle_trace(trace))
+ #init panel and plot
+ wx.Panel.__init__(self, parent, style=wx.SIMPLE_BORDER)
+ self.plotter = plotter.channel_plotter(self)
+ self.plotter.SetSize(wx.Size(*size))
+ self.plotter.set_title(title)
+ self.plotter.enable_legend(True)
+ self.plotter.enable_point_label(True)
+ self.plotter.enable_grid_lines(True)
+ self.plotter.set_use_persistence(use_persistence)
+ self.plotter.set_persist_alpha(persist_alpha)
+ #setup the box with plot and controls
+ self.control_panel = control_panel(self)
+ main_box = wx.BoxSizer(wx.HORIZONTAL)
+ main_box.Add(self.plotter, 1, wx.EXPAND)
+ main_box.Add(self.control_panel, 0, wx.EXPAND)
+ self.SetSizerAndFit(main_box)
+ #register events
+ self.subscribe(AVERAGE_KEY, self._reset_peak_vals)
+ self.subscribe(MSG_KEY, self.handle_msg)
+ self.subscribe(SAMPLE_RATE_KEY, self.update_grid)
+ for key in (
+ BASEBAND_FREQ_KEY,
+ Y_PER_DIV_KEY, X_DIVS_KEY,
+ Y_DIVS_KEY, REF_LEVEL_KEY,
+ ): self.subscribe(key, self.update_grid)
+ self.subscribe(USE_PERSISTENCE_KEY, self.plotter.set_use_persistence)
+ self.subscribe(PERSIST_ALPHA_KEY, self.plotter.set_persist_alpha)
+ #initial update
+ self.update_grid()
+
+ def set_callback(self,callb):
+ self.plotter.set_callback(callb)
+
+ def autoscale(self, *args):
+ """
+ Autoscale the fft plot to the last frame.
+ Set the dynamic range and reference level.
+ """
+ if not len(self.samples): return
+ min_level, max_level = common.get_min_max_fft(self.samples)
+ #set the range to a clean number of the dynamic range
+ self[Y_PER_DIV_KEY] = common.get_clean_num(1+(max_level - min_level)/self[Y_DIVS_KEY])
+ #set the reference level to a multiple of y per div
+ self[REF_LEVEL_KEY] = self[Y_PER_DIV_KEY]*round(.5+max_level/self[Y_PER_DIV_KEY])
+
+ def _reset_peak_vals(self, *args): self.peak_vals = EMPTY_TRACE
+
+ def handle_msg(self, msg):
+ """
+ Handle the message from the fft sink message queue.
+ If complex, reorder the fft samples so the negative bins come first.
+ If real, keep take only the positive bins.
+ Plot the samples onto the grid as channel 1.
+ If peak hold is enabled, plot peak vals as channel 2.
+
+ Args:
+ msg: the fft array as a character array
+ """
+ if not self[RUNNING_KEY]: return
+ #convert to floating point numbers
+ samples = numpy.fromstring(msg, numpy.float32)[:self.fft_size] #only take first frame
+ num_samps = len(samples)
+ #reorder fft
+ if self.real: samples = samples[:(num_samps+1)/2]
+ else: samples = numpy.concatenate((samples[num_samps/2+1:], samples[:(num_samps+1)/2]))
+ self.samples = samples
+ #peak hold calculation
+ if self[PEAK_HOLD_KEY]:
+ if len(self.peak_vals) != len(samples): self.peak_vals = samples
+ self.peak_vals = numpy.maximum(samples, self.peak_vals)
+ #plot the peak hold
+ self.plotter.set_waveform(
+ channel='Peak',
+ samples=self.peak_vals,
+ color_spec=PEAK_VALS_COLOR_SPEC,
+ )
+ else:
+ self._reset_peak_vals()
+ self.plotter.clear_waveform(channel='Peak')
+ #plot the fft
+ self.plotter.set_waveform(
+ channel='FFT',
+ samples=samples,
+ color_spec=FFT_PLOT_COLOR_SPEC,
+ )
+ #update the plotter
+ self.plotter.update()
+
+ def update_grid(self, *args):
+ """
+ Update the plotter grid.
+ This update method is dependent on the variables below.
+ Determine the x and y axis grid parameters.
+ The x axis depends on sample rate, baseband freq, and x divs.
+ The y axis depends on y per div, y divs, and ref level.
+ """
+ for trace in TRACES:
+ channel = '%s'%trace.upper()
+ if self[TRACE_SHOW_KEY+trace]:
+ self.plotter.set_waveform(
+ channel=channel,
+ samples=self._traces[trace],
+ color_spec=TRACES_COLOR_SPEC[trace],
+ )
+ else: self.plotter.clear_waveform(channel=channel)
+ #grid parameters
+ sample_rate = self[SAMPLE_RATE_KEY]
+ baseband_freq = self[BASEBAND_FREQ_KEY]
+ y_per_div = self[Y_PER_DIV_KEY]
+ y_divs = self[Y_DIVS_KEY]
+ x_divs = self[X_DIVS_KEY]
+ ref_level = self[REF_LEVEL_KEY]
+ #determine best fitting x_per_div
+ if self.real: x_width = sample_rate/2.0
+ else: x_width = sample_rate/1.0
+ x_per_div = common.get_clean_num(x_width/x_divs)
+ #update the x grid
+ if self.real:
+ self.plotter.set_x_grid(
+ baseband_freq,
+ baseband_freq + sample_rate/2.0,
+ x_per_div, True,
+ )
+ else:
+ self.plotter.set_x_grid(
+ baseband_freq - sample_rate/2.0,
+ baseband_freq + sample_rate/2.0,
+ x_per_div, True,
+ )
+ #update x units
+ self.plotter.set_x_label('Frequency', 'Hz')
+ #update y grid
+ self.plotter.set_y_grid(ref_level-y_per_div*y_divs, ref_level, y_per_div)
+ #update y units
+ self.plotter.set_y_label('Amplitude', 'dB')
+ #update plotter
+ self.plotter.update()
--
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