#!/usr/bin/env python

###Meter.py###

from Tkinter import *

import Tkinter

import time

class Meter(Frame):

'''A simple progress bar widget.'''

def __init__(self, master, fillcolor='green', text='',value=0.0, **kw):

Frame.__init__(self, master, bg='white', width=350,height=20)

self.configure(**kw)

self._c = Tkinter.Canvas(self, bg=self['bg'],width=self['width'], height=self['height'],highlightthickness=0, relief='flat',bd=0)

self._c.grid(sticky=E+W)

self._r = self._c.create_rectangle(0, 0, 0,int(self['height']), fill=fillcolor, width=0)

self._t = self._c.create_text(int(self['width'])/2,int(self['height'])/2, text='')

self.set(value, text)

def set(self, value=0.0, text=None):

#make the value failsafe:

if value < 0.0:

value = 0.0

elif value > 1.0:

value = 1.0

if text == None:

#if no text is specified get the default percentage

text = str(int(round(100 * value))) + ' %'

self._c.coords(self._r, 0, 0, int(self['width']) * value,int(self['height']))

self._c.itemconfigure(self._t, text=text)

class App(Frame):

def __init__(self,parent=None, **kw):

Frame.__init__(self,parent,kw)

self.lblProgress = Label(self,text="Battery")

self.lblProgress.grid(row=0,column=0,padx=5,pady=5)

self.m = Meter(self,text='Hello')

self.m.grid(row=0,column=1,padx=5,pady=5)

self.m.set(0.0,'Hello')

self.lblProgress1 = Label(self,text="Altitude")

self.lblProgress1.grid(row=1,column=0,padx=5,pady=5)

self.m1 = Meter(self,text='Hello')

self.m1.grid(row=1,column=1,padx=5,pady=5)

self.m1.set(0.0)

self.value = 0.0

self._update()

def _update(self):

self.value += 0.01

if self.value > 0.99:

self.value = 0.0

altitude = str(self.value * 300) + " feet"

self.m.set(1.0-self.value)

self.m1.set(self.value-0.10,altitude)

self._timer = self.after(100, self._update)

def main():

root = Tk()

app = App(root)

app.grid(row=0)

root.mainloop()

if __name__ == '__main__':

main()