from Tkinter import *
import time

class DrawingPanel(Frame):
    """A Tkinter wrapper object aimed at mimicking the Java DrawingPanel."""
    def __init__(self, w=500, h=500, master=None):
        """Create a window with height h and width w and parent window master."""
        Frame.__init__(self, master)
        self.pack()
        self.canvas = Canvas(self, width=w, height=h)
        self.canvas["bg"] = "white"
        self.canvas.pack({"side": "right"})
        self.update()

    def getGraphics(self):
        """Get the Graphics object equivalent."""
        return self.canvas

    def setBackground(self, color):
	"""Set the background color of the window."""
	self.canvas["bg"] = color
    
    def show(self):
        """Show the window.
        Note: this will block such that the code after this
        call will not be called until the window is closed."""
        self.mainloop()
    
    def sleep(self, ms):
        """Pause the code for ms milliseconds."""
        self.update()
        time.sleep(ms / 1000.0)
        self.update()