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/* This file is part of Evoral.
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* Copyright (C) 2000-2014 Paul Davis
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* Author: David Robillard
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*
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* Evoral is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for 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 St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "evoral/ParameterDescriptor.hpp"
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namespace Evoral {
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ParameterDescriptor::ParameterDescriptor()
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: key((uint32_t)-1)
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, datatype(Variant::NOTHING)
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, unit(NONE)
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, normal(0)
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, lower(0)
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, upper(0)
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, step(0)
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, smallstep(0)
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, largestep(0)
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, integer_step(false)
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, toggled(false)
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, logarithmic(false)
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, sr_dependent(false)
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, min_unbound(0)
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, max_unbound(0)
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, enumeration(false)
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{}
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/* Set step, smallstep, and largestep, based on current description */
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void
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ParameterDescriptor::update_steps()
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{
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if (unit == ParameterDescriptor::MIDI_NOTE) {
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step = smallstep = 1; // semitone
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largestep = 12; // octave
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} else if (integer_step) {
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const float delta = upper - lower;
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smallstep = delta / 10000.0f;
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step = delta / 1000.0f;
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largestep = delta / 40.0f;
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smallstep = std::max(1.0, rint(smallstep));
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step = std::max(1.0, rint(step));
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largestep = std::max(1.0, rint(largestep));
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}
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/* else: leave all others as default '0'
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* in that case the UI (eg. AutomationController::create)
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* uses internal_to_interface() to map the value
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* to an appropriate interface range
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*/
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}
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} // namespace Evoral
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