/**
 * @RDE_HEADER@
 * A Button with an elliptic Pixmap and a menu icon when hovering. In the style of LtsStyle.
 * $Id$
 * $HeadURL$
 * $Author$
 *
 * Created by Mike Wille, SLSE, 2016-06-20
 */

#include "lts_profile_button.h"

#include <QPainter>
#include <QPainterPath>
#include <QPaintEvent>
#include <QBrush>
#include <QPen>
#include <QRect>
#include <QEvent>

using namespace LtsWidgets;


LtsProfileButton::LtsProfileButton(QWidget *parent)
  : QWidget(parent)
  , m_isHovered(false)
  , m_menuEnabled(true) // enabled by default
{
  QSizePolicy qsp = QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
  qsp.setHeightForWidth(true);
  setSizePolicy(qsp);
}


void LtsProfileButton::setPixmap(const QPixmap &pixmap)
{
  if (pixmap.isNull()) // invalid / empty pixmap given, trying to replace it with one from lts_resources
    m_pixmap = QPixmap(QStringLiteral("icon:no_pic.svg")); // when this fails, the pixmap is still invalid, so no checks needed
  else
    m_pixmap = pixmap;

  update();
}


void LtsProfileButton::enterEvent(QEvent *event)
{
  //qWarning() << "enter";
  m_isHovered = true;
  update();
  QWidget::enterEvent(event);
}


void LtsProfileButton::leaveEvent(QEvent *event)
{
  //qWarning() << "leave";
  m_isHovered = false;
  update();
  QWidget::leaveEvent(event);
}


bool LtsProfileButton::event(QEvent *event)
{
  if (event->type() == QEvent::MouseButtonPress && m_menuEnabled)
  {
    emit signalClicked();
    event->accept();
//    m_isHovered = false; // unhovered on click
    update();
    return true;
  }

  return QWidget::event(event); // otherwise..
}


void LtsProfileButton::paintEvent(QPaintEvent* event) // TODO: colors from palette (style plugin) ?
{
  QPainter p(this);
  p.save();

  int minSize;
  QPointF center;
  minSize = height() > width() ? width() : height();
  center = QPointF(width() / 2.0, height() / 2.0);


  // draw profile picture
  p.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
//  QBrush brush = QColor(QStringLiteral("white")); // TODO: from palette

  QPixmap pixmap(minSize, minSize);
  pixmap.fill(Qt::white);

  if (!m_pixmap.isNull())
  {
    if (!(m_isHovered && m_menuEnabled)) // draw if NOT hovered or draw when hovered but menu is disabled
    {
      pixmap = m_pixmap.scaled(minSize, minSize, Qt::KeepAspectRatioByExpanding);
    }
  }

//  p.setBrush(Qt::white);
//  p.setPen(Qt::NoPen);
  QPainterPath path;
  path.addEllipse(center,
                  minSize / 2.0 - 4,
                  minSize / 2.0 - 4);
  p.setClipPath(path);
  p.drawPixmap(center - QPointF(minSize/2.0,minSize/2.0),pixmap);



  // draw frame
  p.setPen(QPen(QColor("gray"), 2));
  p.drawEllipse(center,
                minSize / 2.0 - 4,
                minSize / 2.0 - 4);


  // draw menu icon
  if (m_isHovered && m_menuEnabled)
  {
    p.setPen(QPen(QColor(QStringLiteral("gray")), (minSize / 48 * 2))); // respect height, width is unnecessary

    double xc = size().width()/2.012;
    double yc = size().height()/2.012;
    double diff = minSize/2.012;

    p.drawLine(QPointF(xc - (diff/2.01f), yc - (diff/3.01f)), QPointF(xc + (diff/2.02f), yc - (diff/3.02f)));
    p.drawLine(QPointF(xc - (diff/2.01f), yc - 0.01f),        QPointF(xc + (diff/2.02f), yc - 0));
    p.drawLine(QPointF(xc - (diff/2.01f), yc + (diff/3.01f)), QPointF(xc + (diff/2.02f), yc + (diff/3.02f)));
  }


  event->accept();
  p.restore();
}