62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
# Copyright 2017 Canonical, Ltd.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import asyncio
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from urwid import (
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Text,
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)
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styles = {
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'dots': {
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'texts': [t.replace('*', '\N{bullet}')
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for t in ['|*----|', '|-*---|', '|--*--|', '|---*-|',
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'|----*|', '|---*-|', '|--*--|', '|-*---|']],
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'rate': 0.2,
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},
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'spin': {
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'texts': ['-', '\\', '|', '/'],
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'rate': 0.1,
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},
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}
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class Spinner(Text):
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def __init__(self, style='spin', align='center'):
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self.spin_index = 0
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self.spin_text = styles[style]['texts']
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self.rate = styles[style]['rate']
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super().__init__('', align=align)
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self._spin_task = None
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def spin(self):
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self.spin_index = (self.spin_index + 1) % len(self.spin_text)
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self.set_text(self.spin_text[self.spin_index])
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async def _spin(self):
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while True:
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self.spin()
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await asyncio.sleep(self.rate)
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def start(self):
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self.stop()
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self._spin_task = asyncio.create_task(self._spin())
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def stop(self):
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self.set_text('')
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if self._spin_task is not None:
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self._spin_task.cancel()
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self._spin_task = None
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