cell.py

from graphics import Line, Point


class Cell:
    def __init__(self,win=None):
        self.has_left_wall = True
        self.has_right_wall = True
        self.has_top_wall = True
        self.has_bottom_wall = True
        self._x1 = None
        self._x2 = None
        self._y1 = None
        self._y2 = None
        self._win = win
        self.visited = False

    def draw(self, x1, y1, x2, y2):
        if self._win is None:
            return
        self._x1 = x1
        self._x2 = x2
        self._y1 = y1
        self._y2 = y2
        if self.has_left_wall:
            line = Line(Point(x1, y1), Point(x1, y2))
            self._win.draw_line(line)
        else:
            line = Line(Point(x1, y1), Point(x1, y2))
            self._win.draw_line(line,"white")
        if self.has_top_wall:
            line = Line(Point(x1, y1), Point(x2, y1))
            self._win.draw_line(line)
        else:
            line = Line(Point(x1, y1), Point(x2, y1))
            self._win.draw_line(line,"white")
        if self.has_right_wall:
            line = Line(Point(x2, y1), Point(x2, y2))
            self._win.draw_line(line)
        else:
            line = Line(Point(x2, y1), Point(x2, y2))
            self._win.draw_line(line,"white")
        if self.has_bottom_wall:
            line = Line(Point(x1, y2), Point(x2, y2))
            self._win.draw_line(line)
        else:
            line = Line(Point(x1, y2), Point(x2, y2))
            self._win.draw_line(line,"white")
       

    def draw_move(self,to_cell,undo=False):
        half_length = abs(self._x2 - self._x1) // 2#the cell is square therefore 
        x_center = half_length + self._x1
        y_center = half_length + self._y1

        half_length2 = abs(to_cell._x2 - to_cell._x1) // 2
        x_center2 = half_length2 + to_cell._x1
        y_center2 = half_length2 + to_cell._y1
        fill_color = "red"
        if undo:
            fill_color = "gray"

        line = Line(Point(x_center,y_center),Point(x_center2,y_center2))
        self._win.draw_line(line,fill_color)