Tkinter GUI Application Development Blueprints, Second Edition - Second Edition

Highlighting allowed moves

In the on_square_clicked method, we called the draw_board method to take care of the redrawing or changing of the chess pieces' coordinates. The current draw_board method is not equipped to handle this because we only designed it in the first iteration to provide us with a blank chessboard.

First, let's add a HIGHLIGHT_COLOR constant to the configurations.py file, as follows:

HIGHLIGHT_COLOR = "#2EF70D"

Then, modify the draw_board method to handle this, as follows (see 4.06—view.py):

def draw_board(self):  current_color = BOARD_COLOR_2  for row in range(NUMBER_OF_ROWS):     current_color = self.get_alternate_color(current_color)     for col in range(NUMBER_OF_COLUMNS):        x1, y1 = self.get_x_y_coordinate(row, col) x2, y2 = x1 ...