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/* This file is part of Evoral.
* Copyright (C) 2000-2014 Paul Davis
* Author: David Robillard
*
* Evoral is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "evoral/ParameterDescriptor.hpp"
namespace Evoral {
ParameterDescriptor::ParameterDescriptor()
: key((uint32_t)-1)
, datatype(Variant::NOTHING)
, unit(NONE)
, normal(0)
, lower(0)
, upper(0)
, step(0)
, smallstep(0)
, largestep(0)
, integer_step(false)
, toggled(false)
, logarithmic(false)
, sr_dependent(false)
, min_unbound(0)
, max_unbound(0)
, enumeration(false)
{}
/* Set step, smallstep, and largestep, based on current description */
void
ParameterDescriptor::update_steps()
{
if (unit == ParameterDescriptor::MIDI_NOTE) {
step = smallstep = 1; // semitone
largestep = 12; // octave
} else if (integer_step) {
const float delta = upper - lower;
smallstep = delta / 10000.0f;
step = delta / 1000.0f;
largestep = delta / 40.0f;
smallstep = std::max(1.0, rint(smallstep));
step = std::max(1.0, rint(step));
largestep = std::max(1.0, rint(largestep));
}
/* else: leave all others as default '0'
* in that case the UI (eg. AutomationController::create)
* uses internal_to_interface() to map the value
* to an appropriate interface range
*/
}
} // namespace Evoral
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