#include "lts_splitter_handle.h"
#include <QPainter>
#include <QPaintEvent>
#include <QBrush>
#include <QEvent>
#include <QLinearGradient>
#include <QDebug>


namespace LtsWidgets
{

LtsSplitterHandle::LtsSplitterHandle(Qt::Orientation orientation, QSplitter *parent)
  : QSplitterHandle(orientation, parent)
{
  auto bgrole = backgroundRole();
  QPalette p = palette();
  m_endColor = p.color(bgrole);

  m_colorAnimation = new QPropertyAnimation(this, "splittercolor");
  m_colorAnimation->setDuration(1000);
  m_colorAnimation->setStartValue(m_currentColor);
  m_colorAnimation->setEndValue(m_endColor);
  m_colorAnimation->setLoopCount(2);
  connect(m_colorAnimation, &QPropertyAnimation::finished, this, [this]{
    m_animate = false;
    m_currentColor = m_endColor;
    repaint();
  });

}

LtsSplitterHandle::~LtsSplitterHandle()
{
}

void LtsSplitterHandle::paintEvent(QPaintEvent *event)
{
  if(!m_animate)
  {
    QSplitterHandle::paintEvent(event);
    return;
  }
  QPainter painter(this);
  QLinearGradient gradient;
  gradient.setColorAt(0, m_currentColor);
  

  if(orientation() == Qt::Horizontal)
  {
    gradient.setStart(rect().left(), rect().height()/2);
    gradient.setFinalStop(rect().height(), rect().height()/2);
  }else
  {
    gradient.setStart(rect().width()/2, rect().top());
    gradient.setFinalStop(rect().width()/2, rect().bottom()/2);
  }
  painter.fillRect(event->rect(), QBrush(gradient));
}

void LtsSplitterHandle::animate()
{
  if (m_colorAnimation->state() == QPropertyAnimation::Running)
    return;

  m_currentColor = QColor(239,87,50);
  m_animate = true;
  m_colorAnimation->start();
}

QColor LtsSplitterHandle::splitterColor() const
{
  return m_currentColor;
}

void LtsSplitterHandle::setCurrentColor(const QColor &currentcolor)
{
  if (currentcolor == m_currentColor)
    return;
  m_currentColor = currentcolor;
  repaint();
}

}