tkinter+图片等比例+根据窗口大小缩放

分享一个简单的图片浏览器，一个等比例缩放的算法
使用root.bind方法动态获取窗口大小，不需要重写窗口算法与重新加载图片了，省下了一大笔时间

from PIL import Image, ImageTk
from ttkbootstrap import *


def image_resize(event=None, image=None):
    """
    等比例缩放图片
    :param event: bind事件
    :param image: Image.open(file_path) or Image.open(io.BytesIO(requests.get(url='https://pic2.zhimg.com/v2-2383d0d9ef77715b3cdd61b405dc8aec_1440w.jpg?source=172ae18b').content))
    :return:
    """
    if event is None:
        screen_width, screen_height = win_size()
    else:
        screen_width, screen_height = event.width, event.height
    raw_width, raw_height = image.size[0], image.size[1]
    max_width, max_height = raw_width, screen_height
    min_width = max(raw_width, max_width)
    # 按照比例缩放
    min_height = int(raw_height * min_width / raw_width)
    # 第1次快速调整
    while min_height > screen_height:
        min_height = int(min_height * .9533)
    # 第2次精确微调
    while min_height < screen_height:
        min_height += 1
    # 按照比例缩放
    min_width = int(raw_width * min_height / raw_height)
    # 适应性调整
    while min_width > screen_width:
        min_width -= 1
    # 按照比例缩放
    min_height = int(raw_height * min_width / raw_width)
    images = image.resize((min_width, min_height), Image.Resampling.LANCZOS)
    if event is None:
        return images
    else:
        global png
        canvas.delete(image1)
        png = ImageTk.PhotoImage(images)
        canvas.create_image(screen_width // 2, screen_height // 2, image=png)


def win_size():
	"""
	获取窗口大小，在没有bind事件时使用
	"""
    root.update()
    width = root.winfo_width()
    height = root.winfo_height()
    return width, height


def handler_adaptor(fun, **kwds):
    """事件处理函数的适配器，相当于中介，那个event是从那里来的呢，我也纳闷，这也许就是python的伟大之处吧"""
    return lambda event, fun=fun, kwds=kwds: fun(event, **kwds)


root = Window(size=(1000, 800))
canvas = Canvas(root, bg='#312b39', highlightthickness=0)
canvas.pack(side=LEFT, anchor=CENTER, fill=BOTH, expand=YES)

png = Image.open('1.png')
image = ImageTk.PhotoImage(image=image_resize(image=png, event=None))
image1 = canvas.create_image(win_size()[0] // 2, win_size()[1] // 2, image=image)
root.bind(sequence='<Configure>', func=handler_adaptor(image_resize, image=png))
root.mainloop()