# ChapterOO/car.py
"""ONE wheel moving on the canvas stops when reach border
"""
from graphics import *
winW, winH = 400, 400    # window geometry
class Wheel: # 2 concentric circles: big circle & small circle
    def __init__( self, c, rs, rb ): # constructor: c= center,rs = small radius, rb=big radius
        self.bCircle = Circle( c, rb )
        self.sCircle = Circle( c, rs )
         
    def move( self, dx, dy ):
        self.bCircle.move( dx, dy )
        self.sCircle.move( dx, dy )
        
    def setFill( self, colors, colorb ):
        self.bCircle.setFill( colorb )
        self.sCircle.setFill( colors )
        
    def draw( self, win ):
         self.bCircle.draw( win )
         self.sCircle.draw( win )

    def getCenter( self ):
        return self.bCircle.getCenter()

    def getRadius( self ):
        return self.bCircle.getRadius()
    
class Car:
    def __init__( self, c, rs, rb ): # constructor: c=center, rs=small radius, rb=big radius
        self.w1 = Wheel( c, rs, rb )
        c2 = Point(c.getX()+ 3 *rb,c.getY())
        self.w2 = Wheel( c2, rs, rb )
        self.rect = Rectangle(Point(c.getX(),c.getY()-2*rb),c2)
         
    def move( self, dx, dy ):
        self.w1.move( dx, dy )
        self.w2.move( dx, dy )
        self.rect.move(dx,dy)
        
    def setFill( self, colors, colorb ):
        self.w1.setFill( colors, colorb )
        self.w2.setFill( colors,colorb )
        self.rect.setFill("pink")
        
    def draw( self, win ):
         self.w1.draw( win )
         self.w2.draw( win )
         self.rect.draw(win)

    def getCenter( self ):
        return self.w2.bCircle.getCenter()

    def getRadius( self ):
        return self.w2.bCircle.getRadius()
    
def main():
    win = GraphWin( "Demo: Car moving", winW, winH  )
    cc1 = Car( Point( 50, 30 ), 10, 20 )
    cc1.setFill( "black", "yellow" )
    cc1.draw( win )
    while True:
        cc1.move( 0.1, 0 )
        if cc1.getCenter().getX() > winW - cc1.getRadius():
            break 
 
main()