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#
# 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.
#
##################################################
# Imports
##################################################
import common
import numpy
import wx
import pubsub
from constants import *
from gnuradio import gr #for gr.prefs
import forms
##################################################
# Constants
##################################################
NEG_INF = float('-inf')
SLIDER_STEPS = 100
AVG_ALPHA_MIN_EXP, AVG_ALPHA_MAX_EXP = -3, 0
DEFAULT_NUMBER_RATE = gr.prefs().get_long('wxgui', 'number_rate', 5)
DEFAULT_WIN_SIZE = (300, 300)
DEFAULT_GAUGE_RANGE = 1000
VALUE_REPR_KEY = 'value_repr'
VALUE_REAL_KEY = 'value_real'
VALUE_IMAG_KEY = 'value_imag'
##################################################
# Number window control panel
##################################################
class control_panel(wx.Panel):
"""
A control panel with wx widgits to control the averaging.
"""
def __init__(self, parent):
"""
Create a new control panel.
@param parent the wx parent window
"""
self.parent = parent
wx.Panel.__init__(self, parent)
parent[SHOW_CONTROL_PANEL_KEY] = True
parent.subscribe(SHOW_CONTROL_PANEL_KEY, self.Show)
control_box = wx.BoxSizer(wx.VERTICAL)
#checkboxes for average and peak hold
control_box.AddStretchSpacer()
options_box = forms.static_box_sizer(
parent=self, sizer=control_box, label='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])
#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)
##################################################
# Numbersink window with label and gauges
##################################################
class number_window(wx.Panel, pubsub.pubsub):
def __init__(
self,
parent,
controller,
size,
title,
units,
show_gauge,
real,
minval,
maxval,
decimal_places,
average_key,
avg_alpha_key,
peak_hold,
msg_key,
sample_rate_key,
):
pubsub.pubsub.__init__(self)
wx.Panel.__init__(self, parent, style=wx.SUNKEN_BORDER)
#setup
self.peak_val_real = NEG_INF
self.peak_val_imag = NEG_INF
self.real = real
self.units = units
self.decimal_places = decimal_places
#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[RUNNING_KEY] = True
self[VALUE_REAL_KEY] = minval
self[VALUE_IMAG_KEY] = minval
#setup the box with display and controls
self.control_panel = control_panel(self)
main_box = wx.BoxSizer(wx.HORIZONTAL)
sizer = forms.static_box_sizer(
parent=self, sizer=main_box, label=title,
bold=True, orient=wx.VERTICAL, proportion=1,
)
main_box.Add(self.control_panel, 0, wx.EXPAND)
sizer.AddStretchSpacer()
forms.static_text(
parent=self, sizer=sizer,
ps=self, key=VALUE_REPR_KEY, width=size[0],
converter=forms.str_converter(),
)
sizer.AddStretchSpacer()
self.gauge_real = forms.gauge(
parent=self, sizer=sizer, style=wx.GA_HORIZONTAL,
ps=self, key=VALUE_REAL_KEY, length=size[0],
minimum=minval, maximum=maxval, num_steps=DEFAULT_GAUGE_RANGE,
)
self.gauge_imag = forms.gauge(
parent=self, sizer=sizer, style=wx.GA_HORIZONTAL,
ps=self, key=VALUE_IMAG_KEY, length=size[0],
minimum=minval, maximum=maxval, num_steps=DEFAULT_GAUGE_RANGE,
)
#hide/show gauges
self.show_gauges(show_gauge)
self.SetSizerAndFit(main_box)
#register events
self.subscribe(MSG_KEY, self.handle_msg)
def show_gauges(self, show_gauge):
"""
Show or hide the gauges.
If this is real, never show the imaginary gauge.
@param show_gauge true to show
"""
self.gauge_real.ShowItems(show_gauge)
self.gauge_imag.ShowItems(show_gauge and not self.real)
def handle_msg(self, msg):
"""
Handle a message from the message queue.
Convert the string based message into a float or complex.
If more than one number was read, only take the last number.
Perform peak hold operations, set the gauges and display.
@param event event.data is the number sample as a character array
"""
if not self[RUNNING_KEY]: return
format_string = "%%.%df"%self.decimal_places
if self.real:
sample = numpy.fromstring(msg, numpy.float32)[-1]
if self[PEAK_HOLD_KEY]: sample = self.peak_val_real = max(self.peak_val_real, sample)
label_text = "%s %s"%(format_string%sample, self.units)
self[VALUE_REAL_KEY] = sample
else:
sample = numpy.fromstring(msg, numpy.complex64)[-1]
if self[PEAK_HOLD_KEY]:
self.peak_val_real = max(self.peak_val_real, sample.real)
self.peak_val_imag = max(self.peak_val_imag, sample.imag)
sample = self.peak_val_real + self.peak_val_imag*1j
label_text = "%s + %sj %s"%(format_string%sample.real, format_string%sample.imag, self.units)
self[VALUE_REAL_KEY] = sample.real
self[VALUE_IMAG_KEY] = sample.imag
#set label text
self[VALUE_REPR_KEY] = label_text
#clear peak hold
if not self[PEAK_HOLD_KEY]:
self.peak_val_real = NEG_INF
self.peak_val_imag = NEG_INF
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