Simple Python Console Paint tool
Python
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README.md
helpers.py
main.py
methods.py
test.py

README.md

The MIT License (MIT)
Copyright (c) 2016 Stephan Kristyn (meshfields.de)
http://meshfields.de/mit-license/

Console Drawing Tool README

With this tool you can draw on console in Linux. It uses Python.

Versions

v0.1

First fully working version

v0.2

Moved all test calls over to test.py and fixed some tests

Libraries

unittest: (for TDD)
sys: (basic python interpreter methods)
regex: (for user input sanitation)

Usage

You can draw lines, rectangles and use bucket fills after you declared a canvas.

Start: ./main.py
Tests: ./test.py
Development: methods.py and helpers.py

Screenshot

...............................
.                             .
.                             .
.               x             .
.               x             .
.    xxxxxxxx   x             .
.    xoooooox   x             .
.    xoooooox   x             .
.    xoooooox   x             .
.    xoooooox   x             .
.    xoooooox   x             .
.    xoooooox   x             .
.    xxxxxxxx   x             .
.               x             .
.               x             .
.               x             .
.               x             .
.                             .
.                             .
.                             .
...............................
[Line] [Canvas] [Rectangle] [Bucketfill] [Quit]

Development

Testing

This is what you want to see:

Unit Tests

> Should plot a 5,9 Canvas
> Should bucket fill a 20,4 Canvas with o
> Should substitute tuples in pixels
> Should Get Color Of Coordinates
> Should substitute tuples in pixels
> Should Set Color for a specific Coordinate
> Should substitute tuples in pixels
> Should Init Canvas Area 20,4 with ' '
> Should get colored Canvas
> Should get colored Rectangle
> Should colorise the Coordinates
> Should get Coordinates of Line

10 Tests passed.

Also, in methods.py:
testDrawFourNeighbour() remaining because of testing of global pixels. (which can't be returned from recursive function for testing purposes)

Design-Decisions and Trade-Offs

  • Decided against nCurses or gnuPlot because of requirement to not use a library
  • Emphasised on self-explanatory Code and helpful UX/UI
  • 1 remaining test in methods.py
  • Lines and Rectangles can be drawn upon canvas border, this may be unwanted, but spared me some input checks.

ToDo's:

  • Re-Write as Class for cleaner testing
  • Then make unit tests more autonomous
  • Modularise further

Questions and Feedback to nottinhill@ecomail.at.