"""
Used in support of nks.py
by K. Urner
"""

# from Dr. Zelle's graphics library
from Tkinter import Tk
from Tkinter import Canvas as TkCanvas

class Canvas(object):

    def __init__(self, width, rows, pixelsize):
        self.pixelsize = pixelsize
        self.c = Tk()
        self.cv = TkCanvas(width=width*pixelsize,
                           height=rows*pixelsize,
                           background='black')
        self.cv.pack()

    def drawcell(self, thepoint):
        pixelsize=self.pixelsize
        therow = thepoint[0]*pixelsize
        thecol = thepoint[1]*pixelsize
        self.cv.create_rectangle(therow, thecol,
                                 therow+pixelsize, thecol+pixelsize,
                                 fill='yellow', outline='yellow')

    def showimage(self):
        self.c.mainloop() # comment this out if using IDLE with -n switch
        pass