我想在Tkinter中实现一个满足以下要求的进度条:
到目前为止,我有以下代码:
import Tkinter
import ttk
import time
def task(root):
root.mainloop()
root = Tkinter.Tk()
ft = ttk.Frame()
ft.pack(expand=True, fill=Tkinter.BOTH, side=Tkinter.TOP)
pb_hD = ttk.Progressbar(ft, orient='horizontal', mode='indeterminate')
pb_hD.pack(expand=True, fill=Tkinter.BOTH, side=Tkinter.TOP)
pb_hD.start(50)
root.after(0,task(root))
time.sleep(5) # to be replaced by process of unknown duration
root.destroy()
这里的问题是5s结束后进度条不会停止。
有人可以帮我找错吗?
答案 0 :(得分:3)
一旦主循环处于活动状态,脚本就不会移动到下一行,直到根被销毁。 可能有其他方法可以做到这一点,但我更喜欢使用线程。
像这样,
import Tkinter
import ttk
import time
import threading
#Define your Progress Bar function,
def task(root):
ft = ttk.Frame()
ft.pack(expand=True, fill=Tkinter.BOTH, side=Tkinter.TOP)
pb_hD = ttk.Progressbar(ft, orient='horizontal', mode='indeterminate')
pb_hD.pack(expand=True, fill=Tkinter.BOTH, side=Tkinter.TOP)
pb_hD.start(50)
root.mainloop()
# Define the process of unknown duration with root as one of the input And once done, add root.quit() at the end.
def process_of_unknown_duration(root):
time.sleep(5)
print 'Done'
root.destroy()
# Now define our Main Functions, which will first define root, then call for call for "task(root)" --- that's your progressbar, and then call for thread1 simultaneously which will execute your process_of_unknown_duration and at the end destroy/quit the root.
def Main():
root = Tkinter.Tk()
t1=threading.Thread(target=process_of_unknown_duration, args=(root,))
t1.start()
task(root) # This will block while the mainloop runs
t1.join()
#Now just run the functions by calling our Main() function,
if __name__ == '__main__':
Main()
如果有帮助,请告诉我。