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/***
Olive - Non-Linear Video Editor
Copyright (C) 2019 Olive Team
This program 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 3 of the License, or
(at your option) any later version.
This program 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 more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#include "floatslider.h"
#include <QAudio>
OLIVE_NAMESPACE_ENTER
FloatSlider::FloatSlider(QWidget *parent) :
SliderBase(kFloat, parent),
display_type_(kNormal),
decimal_places_(1),
autotrim_decimal_places_(false)
{
connect(this, SIGNAL(ValueChanged(QVariant)), this, SLOT(ConvertValue(QVariant)));
}
double FloatSlider::GetValue()
{
return Value().toDouble();
}
void FloatSlider::SetValue(const double &d)
{
SliderBase::SetValue(d);
}
void FloatSlider::SetMinimum(const double &d)
{
SetMinimumInternal(d);
}
void FloatSlider::SetMaximum(const double &d)
{
SetMaximumInternal(d);
}
void FloatSlider::SetDecimalPlaces(int i)
{
decimal_places_ = i;
ForceLabelUpdate();
}
void FloatSlider::SetDisplayType(const FloatSlider::DisplayType &type)
{
display_type_ = type;
switch (display_type_) {
case kNormal:
ClearFormat();
break;
case kDecibel:
SetFormat(tr("%1 dB"));
break;
case kPercentage:
SetFormat(tr("%1%"));
break;
}
}
void FloatSlider::SetAutoTrimDecimalPlaces(bool e)
{
autotrim_decimal_places_ = e;
ForceLabelUpdate();
}
QString FloatSlider::ValueToString(const QVariant &v)
{
double val = v.toDouble();
switch (display_type_) {
case kNormal:
// Do nothing, skip to the return string at the end
break;
case kDecibel:
// Convert to decibels and return dB formatted string
val = QAudio::convertVolume(val, QAudio::LinearVolumeScale, QAudio::DecibelVolumeScale);
break;
case kPercentage:
// Multiply value by 100 for user-friendly percentage
val *= 100.0;
break;
}
QString s = QString::number(val, 'f', decimal_places_);
if (autotrim_decimal_places_) {
while (s.endsWith('0')
&& s.at(s.size() - 2).isDigit()) {
s = s.left(s.size() - 1);
}
}
return s;
}
QVariant FloatSlider::StringToValue(const QString &s, bool *ok)
{
switch (display_type_) {
case kNormal:
// Do nothing, skip to the return string at the end
break;
case kDecibel:
{
bool valid;
// See if we can get a decimal number out of this
qreal decibels = s.toDouble(&valid);
if (ok) *ok = valid;
if (valid) {
// Convert from decibel scale to linear decimal
return QAudio::convertVolume(decibels, QAudio::DecibelVolumeScale, QAudio::LinearVolumeScale);
}
break;
}
case kPercentage:
{
bool valid;
// Try to get double value
double val = s.toDouble(&valid);
if (ok) *ok = valid;
// If we could get it, convert back to a 0.0 - 1.0 value and return
if (valid) {
return val * 0.01;
}
break;
}
}
// Just try to convert the string to a double
return s.toDouble(ok);
}
double FloatSlider::AdjustDragDistanceInternal(const double &start, const double &drag)
{
switch (display_type_) {
case kNormal:
// No change here
break;
case kDecibel:
{
qreal current_db = QAudio::convertVolume(start, QAudio::LinearVolumeScale, QAudio::DecibelVolumeScale);
current_db += drag;
qreal adjusted_linear = QAudio::convertVolume(current_db, QAudio::DecibelVolumeScale, QAudio::LinearVolumeScale);
return adjusted_linear;
}
case kPercentage:
return SliderBase::AdjustDragDistanceInternal(start, drag * 0.01);
}
return SliderBase::AdjustDragDistanceInternal(start, drag);
}
void FloatSlider::ConvertValue(QVariant v)
{
emit ValueChanged(v.toDouble());
}
OLIVE_NAMESPACE_EXIT
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