QtTreeCursorNavigation.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/Batch/QtTreeCursorNavigation.h"
#include "MantidQtWidgets/Common/Batch/QtBasicNavigation.h"
 
namespace MantidQt::MantidWidgets::Batch {
 
QtTreeCursorNavigation::QtTreeCursorNavigation(QAbstractItemModel const *model) : m_model(model) {}
 
QtTreeCursorNavigationResult QtTreeCursorNavigation::withoutAppendedRow(QModelIndex const &index) const {
  return std::make_pair(false, index);
}
 
QtTreeCursorNavigationResult QtTreeCursorNavigation::withAppendedRow(QModelIndex const &index) const {
  return std::make_pair(true, index);
}
 
std::pair<bool, QModelIndex> QtTreeCursorNavigation::moveCursorNext(QModelIndex const &currentIndex) const {
  if (currentIndex.isValid()) {
    if (isNotLastCellOnThisRow(currentIndex))
      return withoutAppendedRow(nextCellOnThisRow(currentIndex));
    else if (isNotLastRowInThisNode(currentIndex))
      return withoutAppendedRow(firstCellOnNextRow(currentIndex));
    else
      return withAppendedRow(currentIndex);
  } else
    return withoutAppendedRow(QModelIndex());
}
 
QModelIndex QtTreeCursorNavigation::moveCursorPrevious(QModelIndex const &currentIndex) const {
  if (currentIndex.isValid()) {
    if (isNotFirstCellInThisRow(currentIndex))
      return previousCellInThisRow(currentIndex);
    else if (isNotFirstRowInThisNode(currentIndex))
      return lastCellInPreviousRow(currentIndex);
    else
      return lastCellInParentRowElseNone(currentIndex);
  } else
    return QModelIndex();
}
 
bool QtTreeCursorNavigation::isNotFirstCellInThisRow(QModelIndex const &index) const { return hasCellOnTheLeft(index); }
 
bool QtTreeCursorNavigation::isNotFirstRowInThisNode(QModelIndex const &index) const { return hasRowAbove(index); }
 
QModelIndex QtTreeCursorNavigation::previousCellInThisRow(QModelIndex const &index) const { return leftOf(index); }
 
QModelIndex QtTreeCursorNavigation::lastCellInPreviousRow(QModelIndex const &index) const {
  return index.sibling(index.row() - 1, m_model->columnCount() - 1);
}
 
QModelIndex lastChildRowOf(QModelIndex const &parent, QAbstractItemModel const &model) {
  return model.index(model.rowCount(parent) - 1, 0, parent);
}
 
QModelIndex QtTreeCursorNavigation::lastRowInThisNode(QModelIndex const &parent) const {
  return lastChildRowOf(parent, *m_model);
}
 
QModelIndex QtTreeCursorNavigation::lastCellInParentRowElseNone(QModelIndex const &index) const {
  auto parent = m_model->parent(index);
  if (parent.isValid())
    return parent.sibling(parent.row(), m_model->columnCount() - 1);
  else
    return QModelIndex();
}
 
QModelIndex QtTreeCursorNavigation::firstCellOnNextRow(QModelIndex const &index) const {
  return index.sibling(index.row() + 1, 0);
}
 
QModelIndex QtTreeCursorNavigation::nextCellOnThisRow(QModelIndex const &index) const { return rightOf(index); }
 
bool QtTreeCursorNavigation::isNotLastCellOnThisRow(QModelIndex const &index) const { return hasCellOnTheRight(index); }
 
bool QtTreeCursorNavigation::isNotLastRowInThisNode(QModelIndex const &index) const { return hasRowBelow(index); }
} // namespace MantidQt::MantidWidgets::Batch