--- /dev/null
+#
+# 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.
+#
+
+import wx
+from plotter_base import grid_plotter_base
+from OpenGL.GL import *
+from gnuradio.wxgui import common
+import numpy
+import gltext
+import math
+
+LEGEND_TEXT_FONT_SIZE = 8
+LEGEND_BOX_PADDING = 3
+PADDING = 35, 15, 40, 60 #top, right, bottom, left
+#constants for the waveform storage
+SAMPLES_KEY = 'samples'
+COLOR_SPEC_KEY = 'color_spec'
+MARKERY_KEY = 'marker'
+
+##################################################
+# Channel Plotter for X Y Waveforms
+##################################################
+class channel_plotter(grid_plotter_base):
+
+ def __init__(self, parent):
+ """!
+ Create a new channel plotter.
+ """
+ #init
+ grid_plotter_base.__init__(self, parent, PADDING)
+ self._channels = dict()
+ self.enable_legend(False)
+
+ def _gl_init(self):
+ """!
+ Run gl initialization tasks.
+ """
+ glEnableClientState(GL_VERTEX_ARRAY)
+ self._grid_compiled_list_id = glGenLists(1)
+
+ def enable_legend(self, enable=None):
+ """!
+ Enable/disable the legend.
+ @param enable true to enable
+ @return the enable state when None
+ """
+ if enable is None: return self._enable_legend
+ self.lock()
+ self._enable_legend = enable
+ self.changed(True)
+ self.unlock()
+
+ def draw(self):
+ """!
+ Draw the grid and waveforms.
+ """
+ self.lock()
+ self.clear()
+ #store the grid drawing operations
+ if self.changed():
+ glNewList(self._grid_compiled_list_id, GL_COMPILE)
+ self._draw_grid()
+ self._draw_legend()
+ glEndList()
+ self.changed(False)
+ #draw the grid
+ glCallList(self._grid_compiled_list_id)
+ #use scissor to prevent drawing outside grid
+ glEnable(GL_SCISSOR_TEST)
+ glScissor(
+ self.padding_left+1,
+ self.padding_bottom+1,
+ self.width-self.padding_left-self.padding_right-1,
+ self.height-self.padding_top-self.padding_bottom-1,
+ )
+ #draw the waveforms
+ self._draw_waveforms()
+ glDisable(GL_SCISSOR_TEST)
+ self._draw_point_label()
+ #swap buffer into display
+ self.SwapBuffers()
+ self.unlock()
+
+ def _draw_waveforms(self):
+ """!
+ Draw the waveforms for each channel.
+ Scale the waveform data to the grid using gl matrix operations.
+ """
+ for channel in reversed(sorted(self._channels.keys())):
+ samples = self._channels[channel][SAMPLES_KEY]
+ num_samps = len(samples)
+ #use opengl to scale the waveform
+ glPushMatrix()
+ glTranslatef(self.padding_left, self.padding_top, 0)
+ glScalef(
+ (self.width-self.padding_left-self.padding_right),
+ (self.height-self.padding_top-self.padding_bottom),
+ 1,
+ )
+ glTranslatef(0, 1, 0)
+ if isinstance(samples, tuple):
+ x_scale, x_trans = 1.0/(self.x_max-self.x_min), -self.x_min
+ points = zip(*samples)
+ else:
+ x_scale, x_trans = 1.0/(num_samps-1), 0
+ points = zip(numpy.arange(0, num_samps), samples)
+ glScalef(x_scale, -1.0/(self.y_max-self.y_min), 1)
+ glTranslatef(x_trans, -self.y_min, 0)
+ #draw the points/lines
+ glColor3f(*self._channels[channel][COLOR_SPEC_KEY])
+ marker = self._channels[channel][MARKERY_KEY]
+ if marker: glPointSize(marker)
+ glVertexPointer(2, GL_FLOAT, 0, points)
+ glDrawArrays(marker is None and GL_LINE_STRIP or GL_POINTS, 0, len(points))
+ glPopMatrix()
+
+ def _populate_point_label(self, x_val, y_val):
+ """!
+ Get the text the will populate the point label.
+ Give X and Y values for the current point.
+ Give values for the channel at the X coordinate.
+ @param x_val the current x value
+ @param y_val the current y value
+ @return a string with newlines
+ """
+ #create text
+ label_str = '%s: %s %s\n%s: %s %s'%(
+ self.x_label,
+ common.label_format(x_val),
+ self.x_units, self.y_label,
+ common.label_format(y_val),
+ self.y_units,
+ )
+ for channel in sorted(self._channels.keys()):
+ samples = self._channels[channel][SAMPLES_KEY]
+ num_samps = len(samples)
+ if not num_samps: continue
+ if isinstance(samples, tuple): continue
+ #linear interpolation
+ x_index = (num_samps-1)*(x_val/self.x_scalar-self.x_min)/(self.x_max-self.x_min)
+ x_index_low = int(math.floor(x_index))
+ x_index_high = int(math.ceil(x_index))
+ y_value = (samples[x_index_high] - samples[x_index_low])*(x_index - x_index_low) + samples[x_index_low]
+ label_str += '\n%s: %s %s'%(channel, common.label_format(y_value), self.y_units)
+ return label_str
+
+ def _draw_legend(self):
+ """!
+ Draw the legend in the upper right corner.
+ For each channel, draw a rectangle out of the channel color,
+ and overlay the channel text on top of the rectangle.
+ """
+ if not self.enable_legend(): return
+ x_off = self.width - self.padding_right - LEGEND_BOX_PADDING
+ for i, channel in enumerate(reversed(sorted(self._channels.keys()))):
+ samples = self._channels[channel][SAMPLES_KEY]
+ if not len(samples): continue
+ color_spec = self._channels[channel][COLOR_SPEC_KEY]
+ txt = gltext.Text(channel, font_size=LEGEND_TEXT_FONT_SIZE)
+ w, h = txt.get_size()
+ #draw rect + text
+ glColor3f(*color_spec)
+ self._draw_rect(
+ x_off - w - LEGEND_BOX_PADDING,
+ self.padding_top/2 - h/2 - LEGEND_BOX_PADDING,
+ w+2*LEGEND_BOX_PADDING,
+ h+2*LEGEND_BOX_PADDING,
+ )
+ txt.draw_text(wx.Point(x_off - w, self.padding_top/2 - h/2))
+ x_off -= w + 4*LEGEND_BOX_PADDING
+
+ def set_waveform(self, channel, samples, color_spec, marker=None):
+ """!
+ Set the waveform for a given channel.
+ @param channel the channel key
+ @param samples the waveform samples
+ @param color_spec the 3-tuple for line color
+ @param marker None for line
+ """
+ self.lock()
+ if channel not in self._channels.keys(): self.changed(True)
+ self._channels[channel] = {
+ SAMPLES_KEY: samples,
+ COLOR_SPEC_KEY: color_spec,
+ MARKERY_KEY: marker,
+ }
+ self.unlock()
+
+if __name__ == '__main__':
+ app = wx.PySimpleApp()
+ frame = wx.Frame(None, -1, 'Demo', wx.DefaultPosition)
+ vbox = wx.BoxSizer(wx.VERTICAL)
+
+ plotter = channel_plotter(frame)
+ plotter.set_x_grid(-1, 1, .2)
+ plotter.set_y_grid(-1, 1, .4)
+ vbox.Add(plotter, 1, wx.EXPAND)
+
+ plotter = channel_plotter(frame)
+ plotter.set_x_grid(-1, 1, .2)
+ plotter.set_y_grid(-1, 1, .4)
+ vbox.Add(plotter, 1, wx.EXPAND)
+
+ frame.SetSizerAndFit(vbox)
+ frame.SetSize(wx.Size(800, 600))
+ frame.Show()
+ app.MainLoop()
projects / debian / gnuradio / blobdiff