from cs1graphics import *

class ShapeHandler(EventHandler):
    def __init__(self,monitor):
        EventHandler.__init__(self)
        self._m=monitor

    def handle(self,event):
        if event.getDescription() == 'mouse click':
            self._m.release()

def main():
    paper=Canvas(700,600,'light yellow','Echoing characters in the graphics window')

    checkpoint=Monitor()

    handler=ShapeHandler(checkpoint)

    c=Circle(20,Point(100,100))
    c.setFillColor('blue')
    c.addHandler(handler)
    paper.add(c)

    r=Rectangle(100,200,Point(200,300))
    r.setFillColor('dark green')
    r.addHandler(handler)
    paper.add(r)

    checkpoint.wait()
    paper.setBackgroundColor('orange')

main()