Python Tkinter顯示加載動畫，同時執行某些任務

Question

我找到了這個有用的代碼爲從「vegaseat」提供https://www.daniweb.com/programming/software-development/threads/396918/how-to-use-animated-gifs-with-tkinter Tkinter動畫。

我已經改編了一個類似的設計來顯示一個項目的gif動畫。我希望將其作爲腳本的某些區域的功能實現，例如，導入模塊等。我已經嘗試了一些方法，但是當我將它作爲函數調用時，它首先運行動畫，然後導入模塊（如我們所期望的那樣）。

我想我正在探索如何讓它同時工作......當腳本導入模塊（或運行另一個我希望顯示動畫的過程）時，動畫將被顯示，然後消失，直到下一個電話。建議將不勝感激。

非常感謝。

# mimic an animated GIF displaying a series of GIFs 
# an animated GIF was used to create the series of GIFs 
# with a common GIF animator utility 

import time 
from Tkinter import * 
root = Tk() 
imagelist = ["dog001.gif","dog002.gif","dog003.gif", 
      "dog004.gif","dog005.gif","dog006.gif","dog007.gif"] 
# extract width and height info 
photo = PhotoImage(file=imagelist[0]) 
width = photo.width() 
height = photo.height() 
canvas = Canvas(width=width, height=height) 
canvas.pack() 
# create a list of image objects 
giflist = [] 
for imagefile in imagelist: 
    photo = PhotoImage(file=imagefile) 
    giflist.append(photo) 
# loop through the gif image objects for a while 
for k in range(0, 1000): 
    for gif in giflist: 
     canvas.delete(ALL) 
     canvas.create_image(width/2.0, height/2.0, image=gif) 
     canvas.update() 
     time.sleep(0.1) 
root.mainloop() 

編輯：我試圖執行代碼，下面，每一些有用的建議。目標是開始動畫，而應用程序正在導入「IMPORTS」函數中的模塊，然後在導入完成後將其銷燬。

# Import modules 
from Tkinter import * 
from PIL import ImageTk 
from PIL import Image 
import os,time 
from os.path import dirname 
from os.path import join 

def IMPORTS(): 
    import tkMessageBox 
    from ttk import Combobox 
    import csv,datetime 
    import xlrd,xlwt 
    import getpass 
    import traceback 
    import arcpy 
    from arcpy import AddMessage 
    import win32com.client 


inGif = #root image (.gif) 
FramesFolder = #Folder containing frames of the root image 

W=Toplevel() 
W.wm_overrideredirect(True) # I wish to only display the widget spinning without the window frame 

imagelist = [os.path.join(FramesFolder,s) for s in os.listdir(FramesFolder) if not s.endswith('db')] 
# extract width and height info 
photo = PhotoImage(file=imagelist[0]) 
width = photo.width() 
height = photo.height() 
canvas = Canvas(W,width=width, height=height) 
canvas.pack() 
# create a list of image objects 
giflist = [] 
for imagefile in imagelist: 
    photo = PhotoImage(file=imagefile) 
    giflist.append(photo) 

timer_id = None 

def start_loading(n=0): 
    global timer_id 
    gif = giflist[n%len(giflist)] 
    canvas.create_image(gif.width()//2, gif.height()//2, image=gif) 
    timer_id = W.after(100, start_loading, n+1) # call this function every 100ms 

def stop_loading(): 
    if timer_id: 
     W.after_cancel(timer_id) 
     canvas.delete(ALL) 

start_loading() 
IMPORTS() 
stop_loading() 
# The spinning widget should be completely destroyed before moving on... 

它返回

"NameError: name 'tkMessageBox' is not defined" 

Answer 1

您可以使用Tk.after()和Tk.after_cancel()啓動和停止動畫：

timer_id = None 

def start_loading(n=0): 
    global timer_id 
    gif = giflist[n%len(giflist)] 
    canvas.create_image(gif.width()//2, gif.height()//2, image=gif) 
    timer_id = root.after(100, start_loading, n+1) # call this function every 100ms 

def stop_loading(): 
    if timer_id: 
     root.after_cancel(timer_id) 
     canvas.delete(ALL) 

然後，您可以在漫長的過程之前調用start_loading()和呼叫stop_loading()經過漫長的過程：

start_loading() 
long_process() # your long process 
stop_loading()