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dommodel.cpp Example File
itemviews/simpledommodel/dommodel.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2005-2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
 **
 ** This file is part of the documentation of the Qt Toolkit.
 **
 ** Licensees holding a valid Qt License Agreement may use this file in
 ** accordance with the rights, responsibilities and obligations
 ** contained therein.  Please consult your licensing agreement or
 ** contact [email protected] if any conditions of this licensing
 ** agreement are not clear to you.
 **
 ** Further information about Qt licensing is available at:
 ** http://trolltech.com/products/appdev/licensing.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ****************************************************************************/

 #include <QtGui>
 #include <QtXml>

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

 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 Qt::ItemIsEnabled | Qt::ItemIsSelectable;
 }

 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();
 }