imagemodel.cpp Example File

tableview/pixelator/imagemodel.cpp

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  #include "imagemodel.h"

  ImageModel::ImageModel(QObject *parent)
      : QAbstractTableModel(parent)
  {
  }

  QString ImageModel::source() const
  {
      return m_source;
  }

  void ImageModel::setSource(const QString &source)
  {
      if (m_source == source)
          return;

      beginResetModel();
      m_source = source;
      m_image.load(m_source);
      endResetModel();
  }

  int ImageModel::rowCount(const QModelIndex &parent) const
  {
      if (parent.isValid())
          return 0;
      return m_image.height();
  }

  int ImageModel::columnCount(const QModelIndex &parent) const
  {
      if (parent.isValid())
          return 0;
      return m_image.width();
  }

  QVariant ImageModel::data(const QModelIndex &index, int role) const
  {
      if (!index.isValid() || role != Qt::DisplayRole)
          return QVariant();
      return qGray(m_image.pixel(index.column(), index.row()));
  }

  QVariant ImageModel::headerData(int /* section */, Qt::Orientation /* orientation */,
                                  int role) const
  {
      if (role == Qt::SizeHintRole)
          return QSize(1, 1);
      return QVariant();
  }