#include "topic_previewer.h"

#include <QDebug>
#include <QDrag>
#include <QMimeData>
#include <QMouseEvent>
#include <QPainter>


namespace TopicEditorBase
{

TopicPreviewer::TopicPreviewer(QWidget *parent)
  : QWidget(parent)
{


  setVisible(false);
}

TopicPreviewer::~TopicPreviewer()
{}




void TopicPreviewer::setTopicData(const TopicData &data)
{
  m_topicData = data;

  if (m_topicData.state) 
    return;
}




void TopicPreviewer::mousePressEvent(QMouseEvent *event)
{
  
  if (m_topicData.topicType == TopicType::Invalid || m_topicData.duration < 1 || event->buttons() != Qt::LeftButton)
    return;

  m_topicData.state = true; 
  QByteArray byteArray;
  QDataStream dataStream(&byteArray, QIODevice::WriteOnly);
  dataStream << m_topicData;
  m_topicData.state = false; 
  QMimeData *mimeData = new QMimeData;
  mimeData->setData(TopicData::mime, byteArray);
  QDrag *drag = new QDrag(this);
  drag->setDragCursor(QPixmap(), Qt::CopyAction);
  drag->setMimeData(mimeData);
  emit startDragMe();
  if (drag->exec(Qt::CopyAction) == Qt::CopyAction) 
    emit deleteMe();
  emit stopDragMe();
}


void TopicPreviewer::paintEvent(QPaintEvent *event)
{
  QWidget::paintEvent(event);

  if (m_topicData.topicType == TopicType::Invalid)
    return;

  QPainter painter(this);
  painter.setClipping(true);
  painter.setClipRect(rect(), Qt::ReplaceClip);
  painter.setPen(isEnabled() ? Qt::black : Qt::lightGray);
  painter.setBrush(QBrush(topicTypeColor(m_topicData.topicType)));
  painter.drawRect(rect().adjusted(0, 0, -1, -1));
  painter.drawText(rect().adjusted(3, 16, -1, -1), m_topicData.description);
  if (!isEnabled())
  {
    painter.setBrush(QBrush(QColor(255, 255, 255, 204)));
    painter.drawRect(rect().adjusted(0, 0, -1, -1));
  }

}

}