graph_plotter_rewrite.py
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#!/usr/bin/env python
import pyglet
#import math
#import time
import serial
from colours import *
datafeed = serial.Serial(
port='/dev/ttyUSB0',
baudrate = 9600,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
bytesize=serial.EIGHTBITS,
timeout=1
)
class Series:
def __init__(self, points=100, title="Series title", xname="x-axis name", yname="y-axis name"):
self.title = title
self.xname = xname
self.yname = yname
self.data = []
self.points = points
def addpoint(self, point):
self.data.append(point)
if len(self.data) > self.points:
del self.data[0]
class Plot(pyglet.window.Window):
def __init__(self, series):
"""Setup a the details of a plot, and create a corresponding window"""
pyglet.window.Window.__init__(self, resizable=True)
self.series = series
self.title = self.series.title
self.font = 'Arkhip'
self.margins = (0.05, 0.05) # Fractions of window size
self.lines = (12, 8)
#self.resizable = True
self.set_caption(self.title)
def on_resize(self, width, height):
self.bounds = ((int(self.width * self.margins[0]), int(self.width * (1 - self.margins[0]))),
(int(self.height * self.margins[1]), int(self.height * (1 - self.margins[1]))))
pyglet.window.Window.on_resize(self, width, height)
def on_draw(self):
"""Draw all the components of the graph"""
self.drawBackground()
self.drawHeading()
self.drawXAxis()
def drawBackground(self):
"""Draw the graph background, currently a plain colour"""
pyglet.image.SolidColorImagePattern(WHITE).create_image(self.width, self.height).blit(0, 0)
def drawHeading(self):
"""Draw a title for the graph (duplicated in the window titlebar, if present"""
heading = pyglet.text.Label(self.title, color=BLACK,
font_name=self.font, font_size=self.height*self.margins[0]*0.8, x=self.width/2, y=self.height,
anchor_x='center', anchor_y='top')
heading.draw()
def drawXAxis(self):
pyglet.graphics.draw(2, pyglet.gl.GL_LINES, ('v2i', (self.bounds[0][0], self.bounds[1][0],
self.bounds[0][0], self.bounds[1][1])),
('c3B', (0, 0, 0, 0, 0, 0)))
testseries = Series()
plots = []
plots.append(Plot(testseries))
def pollSerial(elapsed):
"""Check serial port for incoming data"""
# Note, elapsed is time since last call of this function
values = datafeed.readline().strip().split(", ")
testseries.addpoint(values)
pyglet.clock.schedule_interval(pollSerial, 0.1)
pyglet.app.run()