GUI_Dice.py

from tkinter import *
import random

class GUIDie(Canvas):
    '''6-sided Die class for GUI'''

    def __init__(self,master,valueList=[1,2,3,4,5,6],colorList=['black']*6):
        '''GUIDie(master,[valueList,colorList]) -> GUIDie
        creates a GUI 6-sided die
          valueList is the list of values (1,2,3,4,5,6 by default)
          colorList is the list of colors (all black by default)'''
        # create a 60x60 white canvas with a 5-pixel grooved border
        Canvas.__init__(self,master,width=60,height=60,bg='white',\
                        bd=5,relief=GROOVE)
        # store the valuelist and colorlist
        self.valueList = valueList
        self.colorList = colorList
        # initialize the top value
        self.top = 1

    def get_top(self):
        '''GUIDie.get_top() -> int
        returns the value on the die'''
        return self.valueList[self.top-1]

    def roll(self):
        '''GUIDie.roll()
        rolls the die'''
        self.top = random.randrange(1,7)
        self.draw()

    def draw(self):
        '''GUIDie.draw()
        draws the pips on the die'''
        # clear old pips first
        self.erase()
        # location of which pips should be drawn
        pipList = [[(1,1)],
                   [(0,0),(2,2)],
                   [(0,0),(1,1),(2,2)],
                   [(0,0),(0,2),(2,0),(2,2)],
                   [(0,0),(0,2),(1,1),(2,0),(2,2)],
                   [(0,0),(0,2),(1,0),(1,2),(2,0),(2,2)]]
        for location in pipList[self.top-1]:
            self.draw_pip(location,self.colorList[self.top-1])

    def draw_pip(self,location,color):
        '''GUIDie.draw_pip(location,color)
        draws a pip at (row,col) given by location, with given color'''
        (centerx,centery) = (15+20*location[1],15+20*location[0])  # center
        self.create_oval(centerx-5,centery-5,centerx+5,centery+5,fill=color)

    def erase(self):
        '''GUIDie.erase()
        erases all the pips'''
        pipList = self.find_all()
        for pip in pipList:
            self.delete(pip)

class DieTest(Frame):

    def __init__(self,master):
        Frame.__init__(self,master)
        self.grid()
        self.die = GUIDie(self,[1,2,3,4,5,-6],['black']*5+['red'])
        self.die.grid()
        self.value = Label(self,text='',width=15)
        self.value.grid()
        Button(self,text='Roll',command=self.roll).grid()

    def roll(self):
        self.die.roll()
        self.value['text'] = 'Value is: '+str(self.die.get_top())

root = Tk()
dietest = DieTest(root)
dietest.mainloop()