32 lines
922 B
Python
32 lines
922 B
Python
import logging
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import threading
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from typing import Callable, Optional
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class BackgroundTask:
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def __init__(
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self, master, task: Callable, callback: Optional[Callable] = None, args=()
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):
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self.master = master
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self.args = args
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self.task = task
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self.callback = callback
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self.thread = None
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def start(self):
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logging.info("starting task")
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self.thread = threading.Thread(target=self.run, daemon=True)
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self.thread.start()
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def run(self):
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result = self.task(*self.args)
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logging.info("task completed")
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if self.callback:
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if result is None:
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args = ()
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elif isinstance(result, (list, tuple)):
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args = result
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else:
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args = (result,)
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logging.info("calling callback: %s", args)
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self.master.after(0, self.callback, *args)
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