Pattern Drawer

This Python program is designed to draw patterns on a canvas using a dictionary of colors. The program includes functions to process input lines, create a color dictionary, and draw patterns on a canvas.

Functions

create_colour_dictionary(colours_list)

This function takes a list of colors and creates a dictionary where the key is the first letter of the color and the value is the color name.

Parameters:

• colours_list (list): A list of color strings.

Returns:

• dict: A dictionary with the first letter of the color as the key and the color name as the value.

draw_pattern(a_canvas, colour_dictionary, pattern_list, size, start_x, start_y)

This function draws a pattern on a given canvas using the provided color dictionary and pattern list.

Parameters:

• a_canvas (Canvas): The canvas on which to draw the pattern.
• colour_dictionary (dict): A dictionary mapping color codes to color names.
• pattern_list (list): A list of lists representing the pattern to draw.
• size (int): The size of each rectangle in the pattern.
• start_x (int): The starting x-coordinate for the pattern.
• start_y (int): The starting y-coordinate for the pattern.

Usage

1. Create a Color Dictionary:

   colours_list = ["RRed", "GGreen", "BBlue"]
   colour_dictionary = create_colour_dictionary(colours_list)
   

2. Draw a Pattern: pattern_list = [ ["R", "G", "B"], ["G", "B", "R"], ["B", "R", "G"] ] draw_pattern(a_canvas, colour_dictionary, pattern_list, 20, 0, 0)

** Example:

from tkinter import Canvas, Tk

Initialize the Tkinter window and canvas

root = Tk() a_canvas = Canvas(root, width=200, height=200) a_canvas.pack()

Define the color list and pattern

colours_list = ["RRed", "GGreen", "BBlue"] pattern_list = [ ["R", "G", "B"], ["G", "B", "R"], ["B", "R", "G"] ]

Create the color dictionary

colour_dictionary = create_colour_dictionary(colours_list)

Draw the pattern on the canvas

draw_pattern(a_canvas, colour_dictionary, pattern_list, 20, 0, 0)

Run the Tkinter main loop

root.mainloop()

Requirements

Python 3.x Tkinter library