# CSE 142 Python
#
# This file provides a simplified version of the DrawingPanel
# functionality to match our Java DrawingPanel.
#
# It is implemented using Python's built-in Tkinter graphics package.
# Place it in the same directory as your Python programs.
#
from Tkinter import *
import time

class DrawingPanel(Frame):
    def __init__(self, w=500, h=500, master=None):
        Frame.__init__(self, master)
        self.master.title("DrawingPanel")
        self.pack()
        self.canvas = Canvas(self, width=w, height=h)
        self.canvas["bg"] = "white"
        self.canvas.pack({"side": "right"})
        self.update()

    def get_graphics(self):
        return self.canvas
    
    def set_background(self, color):
        self.canvas["bg"] = color

    def sleep(self, ms):
        try:
            self.update()
            time.sleep(ms / 1000.0)
            self.update()
        except Exception:
            pass