How to Prevent Tkinter GUI from Freezing While Waiting for a Thread to Finish?

Freezing/Hanging tkinter GUI in waiting for the thread to complete

In this example, the GUI is freezing up when the button is pressed because the main thread is waiting for the thread created by Thread(target = self.threaded_function) to finish before continuing. To keep the GUI responsive, it's important to avoid blocking the main thread.

Here's an alternative implementation that uses a queue to pass data between the thread and the GUI:

queue = Queue()

def threaded_function():
    while True:
        if not queue.empty():
            item = queue.get()
            print(item)
            # Do other processing here

def helloCallback():
    queue.put("asd")

m = magic()
B = tkinter.Button(top, text = "Hello", command = helloCallback)
B.pack()
top.mainloop()

# Start the thread in the background
t = threading.Thread(target = threaded_function)
t.start()

In this implementation, the GUI thread continues to be responsive while the threaded_function runs in the background. The Queue is used to communicate data between the two threads. When the helloCallback function is called, it adds an item to the queue which is then retrieved by the threaded_function and processed.

The above is the detailed content of How to Prevent Tkinter GUI from Freezing While Waiting for a Thread to Finish?. For more information, please follow other related articles on the PHP Chinese website!