#include "lts_bitfield_widget.h"

#include <QPainter>

namespace LtsWidgets
{

LtsBitfieldWidget::LtsBitfieldWidget(QWidget *parent, quint8 value)
  : QWidget(parent)
  , m_value(value)
{
  setObjectName(QString::fromUtf8("LtsBitfieldWidget"));
}

void LtsBitfieldWidget::paintEvent(QPaintEvent *pe)
{
  QWidget::paintEvent(pe);

  QPainter painter;
  painter.begin(this);
  painter.setPen(Qt::SolidLine);

  if (m_hasCaption)
  {
    QFont font = painter.font();
    font.setPointSizeF( (height()/2.0 > width()/8.0) ? width()/8.0 : height()/2.0 );
    painter.setFont(font);
  }

  for (int i = 0; i < 8; ++i)
  {
    QRectF bitGraphic;

    bitGraphic.setLeft(width() / 8.0 * i);
    bitGraphic.setWidth((width() / 8.0) - 1);
    bitGraphic.setHeight(height() - 1);

    bool bitVal = (m_value & (1 << (7 - i))) > 0;

    painter.fillRect(bitGraphic, QBrush(bitVal ? m_onColor : m_offColor, Qt::SolidPattern));

    if (m_hasCaption)
    {
      painter.setPen(bitVal ? m_offColor : m_onColor);
      painter.drawText(bitGraphic, Qt::AlignCenter, bitVal ? QStringLiteral("1") : QStringLiteral("0"));
    }

    painter.setPen(Qt::gray);
    painter.drawRect(bitGraphic);
  } 

  painter.end();
}

void LtsBitfieldWidget::setHasCaption(bool hasCaption)
{
  if (m_hasCaption == hasCaption)
    return;

  m_hasCaption = hasCaption;
  repaint();

  emit hasCaptionChanged(hasCaption);
}

void LtsBitfieldWidget::setOnColor(const QColor &onColor)
{
  if (m_onColor == onColor)
    return;

  m_onColor = onColor;
  repaint();
}

void LtsBitfieldWidget::setOffColor(const QColor &offColor)
{
  if (m_offColor == offColor)
    return;

  m_offColor = offColor;
  repaint();
}

void LtsBitfieldWidget::mousePressEvent(QMouseEvent *event)
{
  if (!m_isEditable)
  {
    QWidget::mousePressEvent(event);
    return;
  }

  for (int i = 0; i < 8; ++i)
  {
    if (event->pos().x() > width()/8 * i &&
        event->pos().x() < width()/8 * (i + 1))
    {
      m_value ^= (1 << (7 - i));
      emit valueChanged(m_value);
      break;
    }
  }
  repaint();
}

void LtsBitfieldWidget::setEditable(bool editable)
{
  if (m_isEditable == editable)
    return;

  m_isEditable = editable;

  emit isEditableChanged(m_isEditable);
}

void LtsBitfieldWidget::setValue(quint8 value)
{
  if (m_value == value)
    return;

  m_value = value;
  repaint();

  emit valueChanged(m_value);
}

}