'''A class for representing a simple graphical target.

Jeff Ondich, 1/22/07

This class depends on the "graphics.py" library written by
John Zelle for his textbook "Python Programming: An Introduction
to Computer Science."
'''

from graphics import *

class Target:
    def __init__(self, center, radius, nRings):
        '''
        Initializes the Target object's center (a Point),
        radius (an integer), and number of rings (an integer).
        Sets the ring colors to default values of red and white.
        '''
        self.center = center
        self.radius = radius
        self.numberOfRings = nRings
        self.outerColor = color_rgb(200, 0, 0)
        self.innerColor = color_rgb(255, 255, 255)

    def setCenter(self, center):
        self.center = center

    def getCenter(self):
        return self.center

    def setRadius(self, radius):
        self.radius = radius

    def getRadius(self):
        return self.radius

    def setNumberOfRings(self, nRings):
        self.numberOfRings = nRings

    def getNumberOfRings(self):
        return self.numberOfRings

    def setOuterColor(self, color):
        self.outerColor = color

    def getOuterColor(self):
        return self.outerColor

    def setInnerColor(self, color):
        self.innerColor = color

    def getInnerColor(self):
        return self.innerColor

    def draw(self, window):
        ringSeparation = self.radius / self.numberOfRings
        currentRadius = self.radius
        currentColor = self.outerColor
        for k in range(self.numberOfRings):
            circle = Circle(self.center, currentRadius)
            circle.setFill(currentColor)
            circle.draw(window)
            currentRadius = currentRadius - ringSeparation
            if currentColor == self.outerColor:
                currentColor = self.innerColor
            else:
                currentColor = self.outerColor


if __name__ == '__main__':
    window = GraphWin('Target demo', 800, 400)
    window.setBackground(color_rgb(255, 255, 255))

    # Using the default colors, create and draw a target with 5 rings.
    target = Target(Point(150, 200), 100, 5)
    target.draw(window)

    # Change all the features of the target and draw it again.
    target.setOuterColor(color_rgb(0, 200, 50))
    target.setInnerColor(color_rgb(0, 50, 200))
    target.setNumberOfRings(7)
    target.setRadius(50)
    target.setCenter(Point(400, 200))
    target.draw(window)

    # Change the center and one of the colors, and draw it yet again.
    target.setCenter(Point(600, 200))
    target.setOuterColor(color_rgb(0, 0, 0))
    target.draw(window)
    
    s = raw_input('Hit Enter to quit')