git.gag.com Git - debian/gnuradio/blob - gr-wxgui/src/python/histo_window.py

   1 #
   2 # Copyright 2009 Free Software Foundation, Inc.
   3 #
   4 # This file is part of GNU Radio
   5 #
   6 # GNU Radio is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3, or (at your option)
   9 # any later version.
  10 #
  11 # GNU Radio is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with GNU Radio; see the file COPYING.  If not, write to
  18 # the Free Software Foundation, Inc., 51 Franklin Street,
  19 # Boston, MA 02110-1301, USA.
  20 #
  21
  22 ##################################################
  23 # Imports
  24 ##################################################
  25 import plotter
  26 import common
  27 import wx
  28 import numpy
  29 import math
  30 import pubsub
  31 from constants import *
  32 from gnuradio import gr #for gr.prefs
  33 import forms
  34
  35 ##################################################
  36 # Constants
  37 ##################################################
  38 DEFAULT_WIN_SIZE = (600, 300)
  39
  40 ##################################################
  41 # histo window control panel
  42 ##################################################
  43 class control_panel(wx.Panel):
  44         """
  45         A control panel with wx widgits to control the plotter and histo sink.
  46         """
  47
  48         def __init__(self, parent):
  49                 """
  50                 Create a new control panel.
  51                 @param parent the wx parent window
  52                 """
  53                 self.parent = parent
  54                 wx.Panel.__init__(self, parent, style=wx.SUNKEN_BORDER)
  55                 parent[SHOW_CONTROL_PANEL_KEY] = True
  56                 parent.subscribe(SHOW_CONTROL_PANEL_KEY, self.Show)
  57                 control_box = wx.BoxSizer(wx.VERTICAL)
  58                 SIZE = (100, -1)
  59                 control_box = forms.static_box_sizer(
  60                         parent=self, label='Options',
  61                         bold=True, orient=wx.VERTICAL,
  62                 )
  63                 #num bins
  64                 control_box.AddStretchSpacer()
  65                 forms.text_box(
  66                         sizer=control_box, parent=self, label='Num Bins',
  67                         converter=forms.int_converter(),
  68                         ps=parent, key=NUM_BINS_KEY,
  69                 )
  70                 #frame size
  71                 control_box.AddStretchSpacer()
  72                 forms.text_box(
  73                         sizer=control_box, parent=self, label='Frame Size',
  74                         converter=forms.int_converter(),
  75                         ps=parent, key=FRAME_SIZE_KEY,
  76                 )
  77                 #run/stop
  78                 control_box.AddStretchSpacer()
  79                 forms.toggle_button(
  80                         sizer=control_box, parent=self,
  81                         true_label='Stop', false_label='Run',
  82                         ps=parent, key=RUNNING_KEY,
  83                 )
  84                 #set sizer
  85                 self.SetSizerAndFit(control_box)
  86
  87 ##################################################
  88 # histo window with plotter and control panel
  89 ##################################################
  90 class histo_window(wx.Panel, pubsub.pubsub):
  91         def __init__(
  92                 self,
  93                 parent,
  94                 controller,
  95                 size,
  96                 title,
  97                 maximum_key,
  98                 minimum_key,
  99                 num_bins_key,
 100                 frame_size_key,
 101                 msg_key,
 102         ):
 103                 pubsub.pubsub.__init__(self)
 104                 #setup
 105                 self.samples = list()
 106                 #proxy the keys
 107                 self.proxy(MAXIMUM_KEY, controller, maximum_key)
 108                 self.proxy(MINIMUM_KEY, controller, minimum_key)
 109                 self.proxy(NUM_BINS_KEY, controller, num_bins_key)
 110                 self.proxy(FRAME_SIZE_KEY, controller, frame_size_key)
 111                 self.proxy(MSG_KEY, controller, msg_key)
 112                 #initialize values
 113                 self[RUNNING_KEY] = True
 114                 self[X_DIVS_KEY] = 8
 115                 self[Y_DIVS_KEY] = 4
 116                 #init panel and plot
 117                 wx.Panel.__init__(self, parent, style=wx.SIMPLE_BORDER)
 118                 self.plotter = plotter.bar_plotter(self)
 119                 self.plotter.SetSize(wx.Size(*size))
 120                 self.plotter.set_title(title)
 121                 self.plotter.enable_point_label(True)
 122                 self.plotter.enable_grid_lines(False)
 123                 #setup the box with plot and controls
 124                 self.control_panel = control_panel(self)
 125                 main_box = wx.BoxSizer(wx.HORIZONTAL)
 126                 main_box.Add(self.plotter, 1, wx.EXPAND)
 127                 main_box.Add(self.control_panel, 0, wx.EXPAND)
 128                 self.SetSizerAndFit(main_box)
 129                 #register events
 130                 self.subscribe(MSG_KEY, self.handle_msg)
 131                 self.subscribe(X_DIVS_KEY, self.update_grid)
 132                 self.subscribe(Y_DIVS_KEY, self.update_grid)
 133
 134         def handle_msg(self, msg):
 135                 """
 136                 Handle the message from the fft sink message queue.
 137                 @param msg the frame as a character array
 138                 """
 139                 if not self[RUNNING_KEY]: return
 140                 #convert to floating point numbers
 141                 self.samples = 100*numpy.fromstring(msg, numpy.float32)[:self[NUM_BINS_KEY]] #only take first frame
 142                 self.plotter.set_bars(
 143                         bars=self.samples,
 144                         bar_width=0.6,
 145                         color_spec=(0, 0, 1),
 146                 )
 147                 self.update_grid()
 148
 149         def update_grid(self):
 150                 if not len(self.samples): return
 151                 #calculate the maximum y value
 152                 y_off = math.ceil(numpy.max(self.samples))
 153                 y_off = min(max(y_off, 1.0), 100.0) #between 1% and 100%
 154                 #update the x grid
 155                 self.plotter.set_x_grid(
 156                         self[MINIMUM_KEY], self[MAXIMUM_KEY],
 157                         common.get_clean_num((self[MAXIMUM_KEY] - self[MINIMUM_KEY])/self[X_DIVS_KEY]),
 158                 )
 159                 self.plotter.set_x_label('Counts')
 160                 #update the y grid
 161                 self.plotter.set_y_grid(0, y_off, y_off/self[Y_DIVS_KEY])
 162                 self.plotter.set_y_label('Frequency', '%')
 163                 self.plotter.update()