Question

我是python的新手，正在为使用Python的事件创建一个倒数计时器，我注意到画布内的图像不会填满较大显示器上的整个屏幕，并且小部件在调整大小时不会调整大小窗户缩了。我该如何解决？任何帮助表示赞赏。谢谢！

import datetime
import tkinter as tk
import winsound

def round_time(dt, round_to):
    seconds = (dt - dt.min).seconds
    rounding = (seconds + round_to / 2) // round_to * round_to
    return dt + datetime.timedelta(0, rounding - seconds, -dt.microsecond)


def ct():
    def count():
        now = round_time(datetime.datetime.now(), round_to=1)
        eh = datetime.datetime(2019, 3, 30, 20, 30)
        tte = eh - now
        canvas.itemconfig(label_cd, text=str(tte))
        root.after(50, count)

    count()


root = tk.Tk()

winsound.PlaySound('Sound1.wav', winsound.SND_ASYNC + winsound.SND_LOOP)
root.bind('<space>', lambda a: winsound.PlaySound(None, winsound.SND_PURGE))
root.bind('<s>', lambda a: winsound.PlaySound('Sound1.wav', winsound.SND_ASYNC + winsound.SND_LOOP))

root.geometry('1920x1080')
root.attributes('-fullscreen', True)
root.bind('<Escape>', lambda e: root.attributes("-fullscreen", False))
root.bind('<F11>', lambda z: root.attributes("-fullscreen", True))
root.title("Earth Hour Countdown!")
now = round_time(datetime.datetime.now(), round_to=1)
eh = datetime.datetime(2019, 3, 30, 20, 30)
tte = eh - now

canvas = tk.Canvas(root, height=1000, width=600, highlightthickness=0)
canvas.place(relheight=1, relwidth=1)

bg_img = tk.PhotoImage(file="new.gif")
bg_label = canvas.create_image((682.5, 384), image=bg_img)

cte_logo = tk.PhotoImage(file="cte1.gif")
cte_label = canvas.create_image((690, 120), image=cte_logo)

logo = tk.PhotoImage(file="eh60.gif")
logo_canvas = canvas.create_image((715, 590), image=logo)

label_msg = canvas.create_text((410, 300), text="Earth Hour Countdown:", font="Calibri 60 bold", fill="#CDCEDF")

label_cd = canvas.create_text((1080, 300), text=str(tte), font="Calibri 60 bold", fill="#CDCEDF")

ehtime_label = canvas.create_text((700, 400), text=("Earth Hour: " + eh.strftime("%d-%m-%Y %H:%M:%S")), font="Calibri 60 bold", fill="#CDCEDF")

ct()

root.mainloop()

预期结果：https://imgur.com/LkrbJa0
大屏幕显示的结果：https://imgur.com/MtAYSIs
缩小窗口时的结果：https://imgur.com/bAjst6L

Answer 1

要在Python中调整图像大小，请查看Python图像库（PIL）。现有一些有关使用PIL的文章，这些文章帮助我编写了以下代码。通过从运行平台获取的屏幕尺寸和“正确”尺寸的图像的参考尺寸，可以轻松计算出重新调整尺寸的因子。然后，可以通过将此因子应用于参考屏幕尺寸（在这种情况下为270x185）下的图像尺寸，来获得展开/缩小显示所需的尺寸。其余代码仅扫描参考图像的文件夹（Assets_dir），将其打开并使用PIL.Image调整大小，然后将调整大小后的图像保存到新文件夹中。

import PIL.Image

screen_width = root.winfo_screenwidth()
screen_height = root.winfo_screenheight()
width = 1920.0                                #  default screen width/height stored images are based on.
height = 1200.0
width_resize = screen_width/width             #  calculate resize factor needed to correctly display on current screen.
height_resize = screen_height/height

new_width = int(width_resize*270)
new_height = int(height_resize*185)

Assets_dir = os.getcwd() + '\\Assets\\'
files = list(os.scandir(Assets_dir))
for file in files:
    file_ext = file.name[-3:]
    file_basename = file.name[:-4]
    if file_ext == 'gif':
        temp_image = PIL.Image.open(Assets_dir + file.name)
        temp_image = temp_image.resize((new_width, new_height), PIL.Image.ANTIALIAS)
        temp_image.save(Assets_dir + r'/resize/' + file.name)

如何在调整窗口大小时调整tkinter小部件的大小？

1 个答案: