CSC111 Homework 11 Solution Program 2014

--D. Thiebaut (talk) 12:56, 29 April 2014 (EDT)

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Source

#----------------------------------------------------------------------
# hw11b.py
# Julieanna Niu (bi)
# 4/24/2014
#
# Program containing seven classes: Rectangle, Polygon, Curves, Windows,
# Wheels, Cars, and oldCar. Descriptions of each class can be found
# below, along with methods associated with each class.
#
# This program uses the graphics library graphics.py to generate an
# image that contains alternatingrows of cars, with a message in a
# text box in the center of the image. The scheme, colors, car style,
# and message have all been predefined. 
#----------------------------------------------------------------------

from graphics import GraphicsWindow
from random import seed
from random import randrange
from random import choice


# width and height of canvas
MAXWIDTH = 800
MAXHEIGHT = 600

# list of colors that will be available as car colors.
colors = ['RoyalBlue4','RoyalBlue1','dodger blue','light sky blue',
          'deep sky blue','gold','light goldenrod','goldenrod4',
          'goldenrod2', 'khaki1','red','tomato','salmon2', 'firebrick4',
          'OrangeRed2']

#----------------------------------------------------------------------
# Rectangle: a class containing 5 private member variables:
#       - x coordinate of the top left corner of the rectangle
#       - y coordinate of the top left corner of the rectangle
#       - width of the rectangle
#       - height of the rectangle
#       - color of the rectangle (can either be a list of 3 ints
#         between 0 and 255, or a string of a color name recognized
#         by TKinter)
# Methods supported:
#       - draw(canvas): specifies color and draws rectangle onto the
#         canvas.
#----------------------------------------------------------------------
class Rectangle:
    def __init__( self, x, y, width, height, color ):
        self._x      = x
        self._y      = y
        self._width  = width
        self._height = height
        self._color  = color

    def draw( self, canvas ):
        if isinstance(self._color, str):        # if color is string
            canvas.setFill(self._color)
        else:                                    # if color is 3 ints
            canvas.setFill( self._color[0], self._color[1], self._color[2] )
        canvas.drawRect( self._x, self._y, self._width, self._height )


#----------------------------------------------------------------------
# Polygon: a class containing 15 private member variables:
#       - Seven pairs of x and y coordinates specifying the placement
#         of the vertices of a seven-sided polygon shape.
#       - color of the polygon (string of a color name recognized
#         by TKinter)
# Methods supported:
#       - draw(canvas): specifies color and draws polygon onto the
#         canvas. 
#----------------------------------------------------------------------
class Polygon:
    def __init__( self, x1, y1, x2, y2, x3, y3, x4, y4, x5, y5, x6, y6, \
                  x7, y7, color ):
        self._x1      = x1
        self._y1      = y1
        self._x2      = x2
        self._y2      = y2
        self._x3      = x3
        self._y3      = y3
        self._x4      = x4
        self._y4      = y4
        self._x5      = x5
        self._y5      = y5
        self._x6      = x6
        self._y6      = y6
        self._x7      = x7
        self._y7      = y7
        self._color  = color

    def draw( self, canvas ):
        canvas.setLineWidth(3)          # increases width of outline
        canvas.setFill( self._color )            
        canvas.drawPolygon( self._x1, self._y1, self._x2, self._y2,\
                            self._x3, self._y3, self._x4, self._y4,\
                            self._x5, self._y5, self._x6, self._y6, \
                            self._x7, self._y7)

#----------------------------------------------------------------------
# Curves: a class containing 6 private member variables:
#       - x and y coordinates of the top-left corner of the square that
#         encloses the curve
#       - the diameter of the circle that contains the curve
#       - the angle at which the curve begins. Angles are taken with
#         reference to the axis between the fourth and first quadrants.
#       - angle of curve
#       - color of the enclosed curve (string of a color name recognized
#         by TKinter)
# Methods supported:
#       - draw(canvas): specifies color and draws the curve onto the
#         canvas. The 'curve' appears as a part of a circle (i.e.
#         like a pie)
#----------------------------------------------------------------------
class Curves:
    def __init__( self, x, y, diam, start, extent, color ):
        self._x = x
        self._y = y
        self._diam = diam
        self._extent = extent
        self._start = start
        self._color = color
        
    def draw( self, canvas ):
        canvas.setLineWidth(3)
        canvas.setFill (self._color)
        canvas.drawArc(self._x, self._y, self._diam, self._start, \
                       self._extent)

#----------------------------------------------------------------------
# Windows: a class containing 9 private member variables:
#       - Four pairs of x and y coordinates specifying the placement
#         of the vertices of a four-sided polygon shape.
#       - color of the polygon (3 ints between 0 and 255)
# Methods supported:
#       - draw(canvas): specifies color and draws the polygon on the
#         canvas.
#----------------------------------------------------------------------
class Windows:
    def __init__( self, x1, y1, x2, y2, x3, y3, x4, y4, color ):
        self._x1      = x1
        self._y1      = y1
        self._x2      = x2
        self._y2      = y2
        self._x3      = x3
        self._y3      = y3
        self._x4      = x4
        self._y4      = y4
        self._color  = color
        
    def draw( self, canvas ):
        canvas.setFill(self._color[0], self._color[1], self._color[2] )            
        canvas.drawPolygon( self._x1, self._y1, self._x2, self._y2,\
                            self._x3, self._y3, self._x4, self._y4)

#----------------------------------------------------------------------
# Wheels: a class containing 3 private member variables:
#       - x and y coordinates of the center of the circle
#       - the diameter of the circle
# Methods supported:
#       - draw(canvas): draws a 'wheel' on the canvas, which consists
#         of one larger circle with the specified diameter, and a
#         smaller circle centrally superimposed on the large circle. 
#         Color is also specified  (black for the large circle, grey
#         for the small circle).
#----------------------------------------------------------------------
class Wheel:
    def __init__( self, x, y, diam ):
        self._x      = x
        self._y      = y
        self._diam  = diam
    def draw( self, canvas ):
        canvas.setFill( 0, 0, 0 )            # sets color to black
        # changes the x and y coordinates in order to use drawOval method
        # on the canvas as specified by the graphics library. In drawOval,
        # the x and y coordinates are the top-left corner of the rectangle
        # that encloses the oval/circle. 
        canvas.drawOval( self._x-(self._diam//2), self._y-(self._diam//2),\
                         self._diam, self._diam)
        canvas.setFill(200, 200, 200 )       # sets color to grey
        canvas.drawOval( self._x-(self._diam//4), self._y-(self._diam//4), \
                         self._diam//2, self._diam//2)

#----------------------------------------------------------------------
# Car: a class containing 5 private member variables:
#       - x and y coordinates of the top left corner of the rectangle
#         that encloses the car
#       - the width of the rectangle
#       - the height of the rectangle
#       - color of the body of the car (string of a color name recognized
#         by TKinter)
#
# The body of this car is made up of one polygon. There is a light made
# of a rectangle, and windows made of a polygon. There are two wheels. 
#
# Methods supported:
#       - draw(canvas): draws all components of the car onto the canvas
#----------------------------------------------------------------------
class Car:
    def __init__( self, x, y, width, height, color ):
        # All components of the car have been initialized into their
        # respective classes, with variables written with reference
        # to the x and y coordinates of the top-left corner of the
        # rectangle that encloses the car, as well as the width and
        # height of the car.
        self._bodypoly = Polygon(x, y+height, x, y+height//2, x+width//8,\
                        y, x+width//2, y, x+3*(width//4), y+height//2,\
                        x+width, y+height//2, x+width, y+height, color)
        self._lights   = Rectangle(x+width-width//16, y+height//2,
                        width//16, height//8, [125,125,125])  # white lights
        self._windows= Windows( x+width//12,y+height//2, \
                        x+width//8+width//16, y+height//8, \
                        x+width//2-width//16, y+height//8, \
                        x+3*(width//4)-width//8,  y+height//2, \
                        [200,200,200])                        # grey windows
        self._w1 = Wheel( x + 2*width//9, y+height, (width//9)*2)
        self._w2 = Wheel( x + 5*width//7, y+height, (width//9)*2)

        
    def draw( self, canvas ):
        self._bodypoly.draw(canvas)
        self._lights.draw(canvas)
        self._windows.draw(canvas)
        self._w1.draw(canvas)
        self._w2.draw(canvas)


#----------------------------------------------------------------------
# oldCar: a class containing 5 private member variables:
#       - x and y coordinates of the top left corner of a rectangle
#         that encloses the car
#       - the width of the rectangle
#       - the height of the rectangle
#       - color of the body of the car (string of a color name recognized
#         by TKinter)
#
# The body of this car is made up of one rectangle, one semicircle (as the
# top of the car) and two quarter-circles (as the front and back of the car).
# There are two wheels. 
#
# Methods supported:
#       - draw(canvas): draws all components of the car onto the canvas
#----------------------------------------------------------------------
class oldCar:
    def __init__(self, x, y, width, height, color):
        self._body = Rectangle(x+width//4, y+height//2, 50, 25, color)
        self._top = Curves( x+width//4, y, width//2, 0, 180, color)
        self._left = Curves( x, y+height//2, 50, 90, 90, color)
        self._right = Curves (x+width//2,y+height//2, 50,0, 90, color)
        self._w1 = Wheel( x + 2*width//9, y+height, (width//9)*2)
        self._w2 = Wheel( x + 5*width//7, y+height, (width//9)*2)

    def draw (self, canvas):
        self._body.draw(canvas)
        self._top.draw(canvas)
        self._left.draw(canvas)
        self._right.draw(canvas)
        self._w1.draw(canvas)
        self._w2.draw(canvas)

#----------------------------------------------------------------------
# main(): The main function. Generates an image that has rows of cars
# of the same style, of a random color. The center of the image has a
# message within a rectangle ('Unhappy Easter') that hides the cars
# underneath it. 
#----------------------------------------------------------------------
def main():
    
    win = GraphicsWindow(MAXWIDTH, MAXHEIGHT)
    canvas = win.canvas()

    # for loop that draws the cars onto the canvas row by row, of
    # alternating type
    # for aesthetic purposes, the value for height should be between 1/3
    # to 1/2 the value of the width.
    width = 100     # width of rectangle that encloses car
    height = 50     # height of rectangle that encloses car
    y = 0
    count = 1       # when count is odd, use Car class, else use oldCar
    for y in range( 0, MAXHEIGHT, height+height//2):
        x = 0
        if count%2 != 0:
            for x in range ( 0, MAXWIDTH, width+width//4):
                c = Car( x, y, width, height, choice(colors))
                c.draw( canvas )
                count = count + 1
        else:
            for x in range ( 0, MAXWIDTH, width+width//4):
                c = oldCar( x, y, width, height, choice(colors))
                c.draw( canvas )
                count = count + 1
        y = y + height + 20

    # creates textbox
    textbox = Rectangle(200,250,400,100,'lemon chiffon')
    textbox.draw(canvas)

    # text and adjustments
    canvas.setTextAnchor("center")                # centers text
    canvas.setTextFont( 'helvetica', 50, 'bold' )
    canvas.drawText( MAXWIDTH//2, MAXHEIGHT//2,  "Unhappy Easter" )

    # background color of image
    canvas.setBackground( 'peach puff' )

    win.wait()
    win.close() 


# main entry point for the program
main()

Output