dommodel.cpp Example File

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  #include "domitem.h"
  #include "dommodel.h"

  #include <QtXml>

  DomModel::DomModel(QDomDocument document, QObject *parent)
      : QAbstractItemModel(parent), domDocument(document)
  {
      rootItem = new DomItem(domDocument, 0);
  }

  DomModel::~DomModel()
  {
      delete rootItem;
  }

  int DomModel::columnCount(const QModelIndex &/*parent*/) const
  {
      return 3;
  }

  QVariant DomModel::data(const QModelIndex &index, int role) const
  {
      if (!index.isValid())
          return QVariant();

      if (role != Qt::DisplayRole)
          return QVariant();

      DomItem *item = static_cast<DomItem*>(index.internalPointer());

      QDomNode node = item->node();
      QStringList attributes;
      QDomNamedNodeMap attributeMap = node.attributes();

      switch (index.column()) {
          case 0:
              return node.nodeName();
          case 1:
              for (int i = 0; i < attributeMap.count(); ++i) {
                  QDomNode attribute = attributeMap.item(i);
                  attributes << attribute.nodeName() + "=\""
                                +attribute.nodeValue() + '"';
              }
              return attributes.join(' ');
          case 2:
              return node.nodeValue().split("\n").join(' ');
          default:
              return QVariant();
      }
  }

  Qt::ItemFlags DomModel::flags(const QModelIndex &index) const
  {
      if (!index.isValid())
          return 0;

      return QAbstractItemModel::flags(index);
  }

  QVariant DomModel::headerData(int section, Qt::Orientation orientation,
                                int role) const
  {
      if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
          switch (section) {
              case 0:
                  return tr("Name");
              case 1:
                  return tr("Attributes");
              case 2:
                  return tr("Value");
              default:
                  return QVariant();
          }
      }

      return QVariant();
  }

  QModelIndex DomModel::index(int row, int column, const QModelIndex &parent)
              const
  {
      if (!hasIndex(row, column, parent))
          return QModelIndex();

      DomItem *parentItem;

      if (!parent.isValid())
          parentItem = rootItem;
      else
          parentItem = static_cast<DomItem*>(parent.internalPointer());

      DomItem *childItem = parentItem->child(row);
      if (childItem)
          return createIndex(row, column, childItem);
      else
          return QModelIndex();
  }

  QModelIndex DomModel::parent(const QModelIndex &child) const
  {
      if (!child.isValid())
          return QModelIndex();

      DomItem *childItem = static_cast<DomItem*>(child.internalPointer());
      DomItem *parentItem = childItem->parent();

      if (!parentItem || parentItem == rootItem)
          return QModelIndex();

      return createIndex(parentItem->row(), 0, parentItem);
  }

  int DomModel::rowCount(const QModelIndex &parent) const
  {
      if (parent.column() > 0)
          return 0;

      DomItem *parentItem;

      if (!parent.isValid())
          parentItem = rootItem;
      else
          parentItem = static_cast<DomItem*>(parent.internalPointer());

      return parentItem->node().childNodes().count();
  }