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75 lines
2.3 KiB
75 lines
2.3 KiB
#
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# progress.py: code for handling the one big progress bar
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#
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# Copyright (C) 2012 Red Hat, Inc. All rights reserved.
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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 General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Author(s): Chris Lumens <clumens@redhat.com>
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import logging
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log = logging.getLogger("anaconda")
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from contextlib import contextmanager
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import Queue
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# A queue to be used for communicating progress information between a subthread
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# doing all the hard work and the main thread that does the GTK updates. This
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# queue should have elements of the following format pushed into it:
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#
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# (PROGRESS_CODE_*, [arguments])
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#
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# Arguments vary based on the code given. See below.
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progressQ = Queue.Queue()
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# Arguments:
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#
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# _INIT - [num_steps]
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# _STEP - []
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# _MESSAGE - [string]
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# _COMPLETE - []
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# _QUIT - [exit_code]
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PROGRESS_CODE_INIT = 0
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PROGRESS_CODE_STEP = 1
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PROGRESS_CODE_MESSAGE = 2
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PROGRESS_CODE_COMPLETE = 3
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PROGRESS_CODE_QUIT = 4
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# Convenience methods to put things into the queue without the user having to
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# know the details of the queue.
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def send_init(n_steps):
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progressQ.put((PROGRESS_CODE_INIT, [n_steps]))
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def send_step():
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progressQ.put((PROGRESS_CODE_STEP, []))
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def send_message(message):
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progressQ.put((PROGRESS_CODE_MESSAGE, [message]))
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def send_complete():
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progressQ.put((PROGRESS_CODE_COMPLETE, []))
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def send_quit(code):
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progressQ.put((PROGRESS_CODE_QUIT, [code]))
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# Surround a block of code with progress updating. Before the code runs, the
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# message is updated so the user can tell what's about to take so long.
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# Afterwards, the progress bar is updated to reflect that the task is done.
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@contextmanager
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def progress_report(message):
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send_message(message)
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log.info(message)
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yield
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send_step()
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