Python（Tkinter）-画布for循环颜色更改

Question

I generated a grid using a for-loop in Tkinter, but want to know how I would be able to bind an on-click function to such that when I click on each individual generated rectangle, the rectangle will change color.

from Tkinter import *

master = Tk()

def rowgen(row, col):
    for i in range(row):
        for j in range(col):
            w.create_rectangle(25+50*i, 25+50*j, 50+50*i, 50+50*j, fill="green")

w = Canvas(master, width=225, height=225)
w.pack()
rowgen(4, 4)


master.resizable(0,0)
mainloop()

I'm thinking that I have to first iterate through another for-loop to make an event, where if I click within these coordinates, I'd reconfig the color of one of the rectangles.

Answer 1

By following Curly Joe's hints and making some mistakes, I got the following, which requires only one tag_bind. You might want to try it yourself first.

from tkinter import *

master = Tk()

def box_click(event):
    box = event.widget.find_closest(event.x, event.y)
    print(box)  # remove later
    w.itemconfig(box, fill='red')

def rowgen(row, col):
    for i in range(row):
        for j in range(col):
            w.create_rectangle(25+50*i, 25+50*j, 50+50*i, 50+50*j,
                               fill="green", tag='BOX')

w = Canvas(master, width=225, height=225)
w.pack()
rowgen(4, 4)
w.tag_bind('BOX', '<Button-1>', box_click)

master.resizable(0,0)
mainloop()