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#
# Copyright 2009 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
##################################################
DEFAULT_WIN_SIZE = (600, 300)
##################################################
# histo window control panel
##################################################
class control_panel(wx.Panel):
"""
A control panel with wx widgits to control the plotter and histo sink.
"""
def __init__(self, parent):
"""
Create a new control panel.
@param parent the wx parent window
"""
self.parent = parent
wx.Panel.__init__(self, parent, style=wx.SUNKEN_BORDER)
control_box = wx.BoxSizer(wx.VERTICAL)
SIZE = (100, -1)
control_box = forms.static_box_sizer(
parent=self, label='Options',
bold=True, orient=wx.VERTICAL,
)
#num bins
control_box.AddStretchSpacer()
forms.text_box(
sizer=control_box, parent=self, label='Num Bins',
converter=forms.int_converter(),
ps=parent, key=NUM_BINS_KEY,
)
#frame size
control_box.AddStretchSpacer()
forms.text_box(
sizer=control_box, parent=self, label='Frame Size',
converter=forms.int_converter(),
ps=parent, key=FRAME_SIZE_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)
##################################################
# histo window with plotter and control panel
##################################################
class histo_window(wx.Panel, pubsub.pubsub):
def __init__(
self,
parent,
controller,
size,
title,
maximum_key,
minimum_key,
num_bins_key,
frame_size_key,
msg_key,
):
pubsub.pubsub.__init__(self)
#setup
self.samples = list()
#proxy the keys
self.proxy(MAXIMUM_KEY, controller, maximum_key)
self.proxy(MINIMUM_KEY, controller, minimum_key)
self.proxy(NUM_BINS_KEY, controller, num_bins_key)
self.proxy(FRAME_SIZE_KEY, controller, frame_size_key)
self.proxy(MSG_KEY, controller, msg_key)
#initialize values
self[RUNNING_KEY] = True
self[X_DIVS_KEY] = 8
self[Y_DIVS_KEY] = 4
#init panel and plot
wx.Panel.__init__(self, parent, style=wx.SIMPLE_BORDER)
self.plotter = plotter.bar_plotter(self)
self.plotter.SetSize(wx.Size(*size))
self.plotter.set_title(title)
self.plotter.enable_point_label(True)
self.plotter.enable_grid_lines(False)
#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(MSG_KEY, self.handle_msg)
self.subscribe(X_DIVS_KEY, self.update_grid)
self.subscribe(Y_DIVS_KEY, self.update_grid)
def handle_msg(self, msg):
"""
Handle the message from the fft sink message queue.
@param msg the frame as a character array
"""
if not self[RUNNING_KEY]: return
#convert to floating point numbers
self.samples = 100*numpy.fromstring(msg, numpy.float32)[:self[NUM_BINS_KEY]] #only take first frame
self.plotter.set_bars(
bars=self.samples,
bar_width=0.6,
color_spec=(0, 0, 1),
)
self.update_grid()
def update_grid(self):
if not len(self.samples): return
#calculate the maximum y value
y_off = math.ceil(numpy.max(self.samples))
y_off = min(max(y_off, 1.0), 100.0) #between 1% and 100%
#update the x grid
self.plotter.set_x_grid(
self[MINIMUM_KEY], self[MAXIMUM_KEY],
common.get_clean_num((self[MAXIMUM_KEY] - self[MINIMUM_KEY])/self[X_DIVS_KEY]),
)
self.plotter.set_x_label('Counts')
#update the y grid
self.plotter.set_y_grid(0, y_off, y_off/self[Y_DIVS_KEY])
self.plotter.set_y_label('Frequency', '%')
self.plotter.update()
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