问题
I am looking to create a UI that displays an animated popup while another task is being carried out. That will exit upon completion. I am using PYSimpleGUI and am using the example listed here to base my work off. I can get a single frame of the animation to display once I start the code and exit upon completion of the task but can't get it to play the entire gif. Code:
import queue
import threading
import time
import PySimpleGUI as sg
# ############################# User callable CPU intensive code #############################
# Put your long running code inside this "wrapper"
# NEVER make calls to PySimpleGUI from this thread (or any thread)!
# Create one of these functions for EVERY long-running call you want to make
def long_function_wrapper(work_id, gui_queue):
# LOCATION 1
# this is our "long running function call"
#time.sleep(10) # sleep for a while as a simulation of a long-running computation
x = 0
while True:
print(x)
time.sleep(0.5)
x = x + 1
if x == 5:
break
# at the end of the work, before exiting, send a message back to the GUI indicating end
gui_queue.put('{} ::: done'.format(work_id))
# at this point, the thread exits
return
def the_gui():
gui_queue = queue.Queue() # queue used to communicate between the gui and long-running code
layout = [[sg.Text('Multithreaded Work Example')],
[sg.Text('This is a Test.', size=(25, 1), key='_OUTPUT_')],
[sg.Button('Go'), sg.Button('Exit')], ]
window = sg.Window('Multithreaded Window').Layout(layout)
# --------------------- EVENT LOOP ---------------------
work_id = 0
while True:
event, values = window.Read(timeout=100) # wait for up to 100 ms for a GUI event
if event is None or event == 'Exit':
#sg.PopupAnimated(None)
break
if event == 'Go': # clicking "Go" starts a long running work item by starting thread
window.Element('_OUTPUT_').Update('Starting long work %s'%work_id)
# LOCATION 2
# STARTING long run by starting a thread
thread_id = threading.Thread(target=long_function_wrapper, args=(work_id, gui_queue,), daemon=True)
thread_id.start()
#for i in range(200000):
work_id = work_id+1 if work_id < 19 else 0
#while True:
sg.PopupAnimated(sg.DEFAULT_BASE64_LOADING_GIF, background_color='white', time_between_frames=100)
#if message == None:
#break
# --------------- Read next message coming in from threads ---------------
try:
message = gui_queue.get_nowait() # see if something has been posted to Queue
except queue.Empty: # get_nowait() will get exception when Queue is empty
message = None # nothing in queue so do nothing
# if message received from queue, then some work was completed
if message is not None:
# LOCATION 3
# this is the place you would execute code at ENDING of long running task
# You can check the completed_work_id variable to see exactly which long-running function completed
completed_work_id = int(message[:message.index(' :::')])
sg.PopupAnimated(None)
#window['_GIF_'].update_animation(sg.DEFAULT_BASE64_LOADING_GIF, time_between_frames=100)
#window.read(timeout = 1000)
# if user exits the window, then close the window and exit the GUI func
window.Close()
############################# Main #############################
if __name__ == '__main__':
the_gui()
print('Exiting Program'
)
回答1:
You've got your call to popup_animated inside of an "if" statement that is only executed once.
You must call popup_animated for every frame you wish to show. It's not spun off as a task that works in the background.
This change to your code will keep the animation going as long as there as background tasks running.
import queue
import threading
import time
import PySimpleGUI as sg
# ############################# User callable CPU intensive code #############################
# Put your long running code inside this "wrapper"
# NEVER make calls to PySimpleGUI from this thread (or any thread)!
# Create one of these functions for EVERY long-running call you want to make
def long_function_wrapper(work_id, gui_queue):
# LOCATION 1
# this is our "long running function call"
# time.sleep(10) # sleep for a while as a simulation of a long-running computation
x = 0
while True:
print(x)
time.sleep(0.5)
x = x + 1
if x == 5:
break
# at the end of the work, before exiting, send a message back to the GUI indicating end
gui_queue.put('{} ::: done'.format(work_id))
# at this point, the thread exits
return
def the_gui():
gui_queue = queue.Queue() # queue used to communicate between the gui and long-running code
layout = [[sg.Text('Multithreaded Work Example')],
[sg.Text('This is a Test.', size=(25, 1), key='_OUTPUT_')],
[sg.Text(size=(25, 1), key='_OUTPUT2_')],
[sg.Button('Go'), sg.Button('Exit')], ]
window = sg.Window('Multithreaded Window').Layout(layout)
# --------------------- EVENT LOOP ---------------------
work_id = 0
while True:
event, values = window.Read(timeout=100) # wait for up to 100 ms for a GUI event
if event is None or event == 'Exit':
# sg.PopupAnimated(None)
break
if event == 'Go': # clicking "Go" starts a long running work item by starting thread
window.Element('_OUTPUT_').Update('Starting long work %s' % work_id)
# LOCATION 2
# STARTING long run by starting a thread
thread_id = threading.Thread(target=long_function_wrapper, args=(work_id, gui_queue,), daemon=True)
thread_id.start()
# for i in range(200000):
work_id = work_id + 1 if work_id < 19 else 0
# while True:
# if message == None:
# break
# --------------- Read next message coming in from threads ---------------
try:
message = gui_queue.get_nowait() # see if something has been posted to Queue
except queue.Empty: # get_nowait() will get exception when Queue is empty
message = None # nothing in queue so do nothing
# if message received from queue, then some work was completed
if message is not None:
# LOCATION 3
# this is the place you would execute code at ENDING of long running task
# You can check the completed_work_id variable to see exactly which long-running function completed
completed_work_id = int(message[:message.index(' :::')])
window.Element('_OUTPUT2_').Update('Finished long work %s' % completed_work_id)
work_id -= 1
if not work_id:
sg.PopupAnimated(None)
if work_id:
sg.PopupAnimated(sg.DEFAULT_BASE64_LOADING_GIF, background_color='white', time_between_frames=100)
# window['_GIF_'].update_animation(sg.DEFAULT_BASE64_LOADING_GIF, time_between_frames=100)
# window.read(timeout = 1000)
# if user exits the window, then close the window and exit the GUI func
window.Close()
############################# Main #############################
if __name__ == '__main__':
the_gui()
print('Exiting Program')
来源：https://stackoverflow.com/questions/59623893/updating-popup-animated-to-play-gif-until-external-task-is-completed-pysimplegu