Question

我正在尝试使用以下代码来确定我的一些想法。但是它没有运行，因为画布在代码结束之前似乎没有任何尺寸，到那时为止做任何事都为时已晚。如何识别画布的尺寸以便在'divw = int（screen_width / 100）'行中使用它？

#!/usr/bin/python3
from tkinter import *


window = Tk()
window.title('Timetable')
window.attributes('-zoomed', True)
screen_width = window.winfo_width()
screen_height = window.winfo_height()
canvas = Canvas(window, width = window.winfo_screenwidth(), height = window.winfo_screenheight(), bg='steelblue')

canvas.pack()
image = PhotoImage(file='blank.png')

screen_width = window.winfo_width()
screen_height = window.winfo_height()
divw = int(screen_width / 100)
print (divw)
for i in range(0, divw):
    print (i)
    canvas.create_image(i * 100+50, 50, anchor = NW, image=image)
mainloop()

Answer 1

尝试在tkinter.update()

之前致电window.winfo_width()

https://stackoverflow.com/a/49216638/8425705

Answer 2

尝试这样做：

try:
    import Tkinter as tk
except:
    import tkinter as tk

class myCanvas(tk.Frame):
    def __init__(self, root):
        #self.root = root
        self.w = 600
        self.h = 400
        self.canvas = tk.Canvas(root, width=self.w, height=self.h)
        self.canvas.pack( fill=tk.BOTH, expand=tk.YES)

        root.bind('<Configure>', self.resize)

    def resize(self, event):
        self.w = event.width
        self.h = event.height
        print ('width  = {}, height = {}'.format(self.w, self.h))

root = tk.Tk()   
root.title('myCanvas')
myCanvas(root)
root.mainloop()

为我工作。

如何在tkinter中获取画布的尺寸？

2 个答案: