Question

I have tried the below code . Functionality-

Click on Button
It will call a method which will take some time to process.
Need to display Loader image so that user can see that processing is going on.

I tried below but if the https://developers.facebook.com/apps/<YOUR_APP_ID>/marketing-api/settings/ before method call doesnot show image and if we comment from tkinter import * from tkinter import filedialog from PIL import Image, ImageTk import cv2 import os import glob import numpy as np image_path = "" image_list = [] class Proj: def __init__(self, master): self.master = master #GUI height and width w = 1250 h = 600 # open folder manager to select image folder image_path = filedialog.askdirectory() master.geometry("%dx%d%+d%+d" % (w ,h ,0,0)) master.resizable(True,True) #read in images from folder self.read_images(master, image_path) #cv2.imshow('image',cv2.imread(image_list[0], 1)) self.img = cv2.imread(image_list[0]) self.img = Image.fromarray(np.array(self.img).copy()) self.img.thumbnail((w//2, w//2+10)) self.img = ImageTk.PhotoImage(self.img) image_frame = Frame(master) image_frame.grid(row = 0, column = 0, columnspan = 3, rowspan = 5) left_panel = Canvas(image_frame, width=w//2, height=h-70) left_panel.grid(row=0, column=0, columnspan=4) imgA_handler = left_panel.create_image((0,0), image = self.img, anchor="nw") right_panel = Canvas(image_frame, width=w//2, height=h-70) right_panel.grid(row=0, column=5, columnspan=4) def read_images(self, master, path): images = path + '/*.tif' for img in glob.glob(images): #will only read in tif images image_list.append(img) root = Tk() example = Proj(root) root.mainloop() then it shows loader image after method is finished.

Will left_panel. method not apply the visibility to Label unless it completes? If yes is there any alternative for this problem?

loaderLabel1.setVisible(true);

Answer 1

There is the class SwingWorker that allows you to perform Tasks in a different thread; here's an example of how your code could be changed to use a SwingWorker:

C:\Users\Morgan\Desktop\testingGrounds>node createMongoDB.js

C:\Users\Morgan\Desktop\testingGrounds\node_modules\mongodb\lib\mongo_client.js:421
          throw err
          ^
[object Object]

Note the methods doInBackground() that does the work in the other thread and done() that is called after doInBackground() is finished.

Java swing Loader image not displaying properly?

1 个答案: