# This program contains a mirror method that flips the appearance
# of a DrawingPanel horizontally pixel-by-pixel.
from DrawingPanel import *

# Horizontally flips the pixels of the given drawing panel.
def mirror(panel):
    px = panel.pixels
    for x in range(panel.width // 2):
        for y in range(panel.height):
            # swap with pixel at "mirrored" location
            opposite = panel.width - 1 - x
            temp = px[x][y]
            px[x][y] = px[opposite][y]
            px[opposite][y] = temp
    panel.pixels = px

def main():
    panel = DrawingPanel(300, 200)
    panel.fill_oval(20, 100, 30, 70)
    panel.draw_rectangle(20, 50, 80, 30)
    mirror(panel)

main()