File: draw_xy_axes.py

#! /usr/bin/python3
# ===================================================================
# draw X,Y axes
# ===================================================================

import user_interface as ui
from graphics import *

# -------------------------------------------------------------------
# ---- function: draw x,y axes
# -------------------------------------------------------------------

def draw_xy_axes(win,linewidth=1,linecolor="black"):

    wx  = win.width            # window width
    wy  = win.height           # window height
    wcx = round(wx/2.0)        # window center X
    wcy = round(wy/2.0)        # window center Y

    # ---- X axis

    xl = Line(Point(0,wcy),Point(wx-1,wcy))
    xl.setWidth(linewidth)
    xl.setFill(linecolor)
    xl.draw(win)

    # ---- Y axis

    yl = Line(Point(wcx,0),Point(wcx,wy-1))
    yl.setWidth(linewidth)
    yl.setFill(linecolor)
    yl.draw(win)

# -------------------------------------------------------------------
# ---- main
# -------------------------------------------------------------------

if __name__ == '__main__':

    win = GraphWin("X,Y Axis", 801, 801)
    win.setBackground("white")

    draw_xy_axes(win)

    ui.pause()

    win.close()