CheckboxHeader.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidQtWidgets/Common/CheckboxHeader.h"
 
namespace MantidQt {
namespace MantidWidgets {
 
CheckboxHeader::CheckboxHeader(Qt::Orientation orientation, QWidget *parent)
    : QHeaderView(orientation, parent), m_checked(false) {
  show();
  setSectionsClickable(true);
}
 
void CheckboxHeader::setChecked(bool checked) {
  if (isEnabled() && m_checked != checked) {
    m_checked = checked;
    updateSection(0);
    emit toggled(m_checked);
  }
}
 
void CheckboxHeader::paintSection(QPainter *painter, const QRect &rect, int logicalIndex) const {
  painter->save();
  QHeaderView::paintSection(painter, rect, logicalIndex);
  painter->restore();
 
  if (logicalIndex == 0) {
    // We have to clear the data otherwise the default "1" appears.
    model()->setHeaderData(0, Qt::Horizontal, tr(""));
 
    QStyleOptionButton option;
 
    if (isEnabled()) {
      option.state |= QStyle::State_Enabled;
    }
 
    option.rect = checkBoxRect(rect);
    option.state |= m_checked ? QStyle::State_On : QStyle::State_Off;
 
    style()->drawControl(QStyle::CE_CheckBox, &option, painter);
  }
}
 
void CheckboxHeader::mousePressEvent(QMouseEvent *event) {
  if (isEnabled() && logicalIndexAt(event->pos()) == 0) {
    m_checked = !m_checked;
    updateSection(0);
    emit toggled(m_checked);
  } else {
    QHeaderView::mousePressEvent(event);
  }
}
 
QRect CheckboxHeader::checkBoxRect(const QRect &sourceRect) const {
  QStyleOptionButton checkBoxStyleOption;
 
  QRect checkBoxRect = style()->subElementRect(QStyle::SE_CheckBoxIndicator, &checkBoxStyleOption);
 
  QPoint checkBoxPoint(sourceRect.x() + 3, sourceRect.y() + sourceRect.height() / 2 - checkBoxRect.height() / 2);
 
  return QRect(checkBoxPoint, checkBoxRect.size());
}
 
} // namespace MantidWidgets
} // namespace MantidQt