effectparameter.cpp

/***************************************************************************
                          effectparameter  -  description
                             -------------------
    begin                : Fri Jan 2 2004
    copyright            : (C) 2004 by Jason Wood
    email                : jasonwood@blueyonder.co.uk
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#include "effectparameter.h"
#include "effectkeyframe.h"
#include <kdebug.h>

EffectParameter::EffectParameter(const QString & name):
m_name(name), m_selectedKeyFrame(0)
{
}


EffectParameter::~EffectParameter()
{
}

const int EffectParameter::numKeyFrames() const
{
    return m_keyFrames.count();
}

void EffectParameter::setSelectedKeyFrame(int ix)
{
    if (ix > (int)m_keyFrames.count() -1) ix = m_keyFrames.count() -1;
    m_selectedKeyFrame = ix;
}

const int EffectParameter::selectedKeyFrame() const
{
    if ((m_selectedKeyFrame < 0) || (m_selectedKeyFrame > m_keyFrames.count() - 1)) return 0;
    return m_selectedKeyFrame;
}

uint EffectParameter::addKeyFrame(EffectKeyFrame * effectKeyFrame)
{
    KeyFrameListIterator itt(m_keyFrames);
    double time = effectKeyFrame->time();
    uint i;
    for (i = 0; itt.current(); i++) {
      if (itt.current()->time() > time)
          break;
      ++itt;
    }
    m_keyFrames.insert(i, effectKeyFrame);
    return i;
}

EffectKeyFrame *EffectParameter::keyframe(int ix) const
{
    KeyFrameListIterator itt(m_keyFrames);

    for (int count = 0; itt.current() && count != ix; ++count) {
      ++itt;
    }

    return itt.current();
}

void EffectParameter::deleteKeyFrame(int ix)
{
    kdDebug() << "EFFET++++++ remove item: " << ix << endl;
    m_keyFrames.remove(ix);
       if (m_selectedKeyFrame > (int)m_keyFrames.count() -1) m_selectedKeyFrame = m_keyFrames.count() -1;
}

EffectKeyFrame *EffectParameter::interpolateKeyFrame(double time) const
{
    EffectKeyFrame *keyFrame = NULL;

    EffectKeyFrame *nextKeyFrame = NULL;
    EffectKeyFrame *prevKeyFrame = NULL;

    KeyFrameListIterator itt(m_keyFrames);
    while (itt.current()) {
      if (itt.current()->time() >= time) {
          nextKeyFrame = itt.current();
          --itt;
          prevKeyFrame = itt.current();
      }
      ++itt;
    }

    if (nextKeyFrame && prevKeyFrame) {
      keyFrame = prevKeyFrame->interpolateKeyFrame(nextKeyFrame, time);
    } else if (nextKeyFrame) {
      keyFrame = nextKeyFrame->clone();
    } else if (prevKeyFrame) {
      keyFrame = prevKeyFrame->clone();
    }

    return keyFrame;
}