oak-editor/app/widget/slider/rationalslider.cpp

/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2021 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 "rationalslider.h"

#include "common/timecodefunctions.h"
#include "core.h"
#include "widget/menu/menu.h"
#include "widget/menu/menushared.h"

namespace olive {

#define super DecimalSliderBase

RationalSlider::RationalSlider(QWidget *parent) :
  super(parent),
  lock_display_type_(false)
{
  connect(Core::instance(), &Core::TimecodeDisplayChanged, this, &RationalSlider::UpdateLabel);
  connect(SliderBase::label(), &SliderLabel::customContextMenuRequested, this, &RationalSlider::ShowDisplayTypeMenu);

  SetDisplayType(kFloat);

  SetValue(rational(0, 0));
}

rational RationalSlider::GetValue()
{
  return GetValueInternal().value<rational>();
}

void RationalSlider::SetValue(const rational &d)
{
  SetValueInternal(QVariant::fromValue(d));
}

void RationalSlider::SetDefaultValue(const rational &r)
{
  super::SetDefaultValue(QVariant::fromValue(r));
}

void RationalSlider::SetMinimum(const rational &d)
{
  SetMinimumInternal(QVariant::fromValue(d));
}

void RationalSlider::SetMaximum(const rational &d)
{
  SetMaximumInternal(QVariant::fromValue(d));
}

void RationalSlider::SetTimebase(const rational &timebase)
{
  timebase_ = timebase;

  // Refresh label since we have a new timebase to generate a timecode with
  UpdateLabel();
}

void RationalSlider::SetDisplayType(const RationalSlider::DisplayType &type)
{
  display_type_ = type;

  UpdateLabel();
}

void RationalSlider::SetLockDisplayType(bool e)
{
  lock_display_type_ = e;
}

bool RationalSlider::GetLockDisplayType()
{
  return lock_display_type_;
}

void RationalSlider::DisableDisplayType(RationalSlider::DisplayType type)
{
  disabled_.append(type);
}

QString RationalSlider::ValueToString(const QVariant &v) const
{
  double val = v.value<rational>().toDouble() + GetOffset().value<rational>().toDouble();

  switch (display_type_) {
  case kTime:
    return Timecode::time_to_timecode(v.value<rational>(), timebase_, Core::instance()->GetTimecodeDisplay());
  case kFloat:
    return FloatToString(val, GetDecimalPlaces(), GetAutoTrimDecimalPlaces());
  case kRational:
    return v.value<rational>().toString();
  }

  return v.toString();
}

QVariant RationalSlider::StringToValue(const QString &s, bool *ok) const
{
  rational r;
  *ok = false;

  switch (display_type_) {
  case kTime:
  {
    r = Timecode::timecode_to_time(s, timebase_, Core::instance()->GetTimecodeDisplay(), ok);
    break;
  }
  case kFloat:
  {
    // First, convert to a double
    double d = s.toDouble(ok);
    if (!(*ok)) {
      break;
    }

    // If double conversion succeeded, convert to a rational
    r = rational::fromDouble(d, ok);
    break;
  }
  case kRational:
    r = rational::fromString(s, ok);
    break;
  }

  //return QVariant::fromValue(r - GetOffset().value<rational>());
  return QVariant::fromValue(r);
}

QVariant RationalSlider::AdjustDragDistanceInternal(const QVariant &start, const double &drag) const
{
  // Assume we want smallest increment to be timebase or 1 frame
  return QVariant::fromValue(start.value<rational>() + rational::fromDouble(drag)*timebase_);
}

void RationalSlider::ValueSignalEvent(const QVariant &v)
{
  emit ValueChanged(v.value<rational>());
}

bool RationalSlider::ValueGreaterThan(const QVariant &lhs, const QVariant &rhs) const
{
  return lhs.value<rational>() > rhs.value<rational>();
}

bool RationalSlider::ValueLessThan(const QVariant &lhs, const QVariant &rhs) const
{
  return lhs.value<rational>() < rhs.value<rational>();
}

void RationalSlider::ShowDisplayTypeMenu()
{
  Menu m(this);

  if (!GetLockDisplayType()) {
    if (!disabled_.contains(kFloat)) {
      QAction* float_action = m.addAction(tr("Float"));
      float_action->setData(kFloat);
      connect(float_action, &QAction::triggered, this, &RationalSlider::SetDisplayTypeFromMenu);
    }

    if (!disabled_.contains(kRational)) {
      QAction* rational_action = m.addAction(tr("Rational"));
      rational_action->setData(kRational);
      connect(rational_action, &QAction::triggered, this, &RationalSlider::SetDisplayTypeFromMenu);
    }

    if (!disabled_.contains(kTime)) {
      QAction* time_action = m.addAction(tr("Time"));
      time_action->setData(kTime);
      connect(time_action, &QAction::triggered, this, &RationalSlider::SetDisplayTypeFromMenu);
    }
  }

  if (display_type_ == kTime) {
    if (!m.actions().isEmpty()) {
      m.addSeparator();
    }
    MenuShared::instance()->AddItemsForTimeRulerMenu(&m);
    MenuShared::instance()->AboutToShowTimeRulerActions(timebase_);
  }

  if (!m.actions().isEmpty()) {
    m.exec(QCursor::pos());
    UpdateLabel();
  }
}

void RationalSlider::SetDisplayTypeFromMenu()
{
  QAction* action = static_cast<QAction*>(sender());

  DisplayType type = static_cast<DisplayType>(action->data().toInt());

  SetDisplayType(type);
}

}