86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
/*
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* Copyright (C) 2010 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2023 Robin Gareus <robin@gareus.org>
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <cassert>
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#include <iostream>
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#include "pbd/progress.h"
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using namespace std;
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PBD::Progress::Progress ()
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: _cancelled (false)
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{
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descend (1);
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}
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/** Descend down one level in terms of progress reporting; e.g. if
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* there is a task which is split up into N subtasks, each of which
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* report their progress from 0 to 100%, call descend() before executing
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* each subtask, and ascend() afterwards to ensure that overall progress
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* is reported correctly.
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*
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* @param p Percentage (from 0 to 1) of the current task to allocate to the subtask.
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*/
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void
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PBD::Progress::descend (float a)
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{
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_stack.push_back (Level (a));
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}
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void
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PBD::Progress::ascend ()
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{
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assert (!_stack.empty ());
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float const a = _stack.back().allocation;
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_stack.pop_back ();
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_stack.back().normalised += a;
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}
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/** Set the progress of the current task.
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* @param p Progress (from 0 to 1)
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*/
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void
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PBD::Progress::set_progress (float p)
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{
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assert (!_stack.empty ());
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_stack.back().normalised = p;
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float overall = 0;
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float factor = 1;
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for (list<Level>::iterator i = _stack.begin(); i != _stack.end(); ++i) {
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factor *= i->allocation;
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overall += i->normalised * factor;
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}
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set_overall_progress (overall);
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}
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void
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PBD::Progress::cancel ()
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{
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_cancelled = true;
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}
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bool
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PBD::Progress::cancelled () const
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{
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return _cancelled;
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}
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