--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/xmlpatterns/qobjectxmlmodel/qobjectxmlmodel.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,459 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QVector>
+#include <QtDebug>
+
+#include <QCoreApplication>
+#include <QMetaProperty>
+#include <QXmlQuery>
+#include <QXmlResultItems>
+
+#include "qobjectxmlmodel.h"
+
+QT_BEGIN_NAMESPACE
+
+/*
+<metaObjects>
+ <metaObject className="QObject"/>
+ <metaObject className="QWidget" superClass="QObject">
+ </metaObject>
+ ...
+</metaObjects>
+<QObject objectName="MyWidget" property1="..." property2="..."> <!-- This is root() -->
+ <QObject objectName="MyFOO" property1="..."/>
+ ....
+</QObject>
+*/
+
+QObjectXmlModel::QObjectXmlModel(QObject *const object, const QXmlNamePool &np)
+ : QSimpleXmlNodeModel(np),
+ m_baseURI(QUrl::fromLocalFile(QCoreApplication::applicationFilePath())),
+ m_root(object),
+ m_allMetaObjects(allMetaObjects())
+{
+ Q_ASSERT(m_baseURI.isValid());
+}
+
+//! [5]
+QXmlNodeModelIndex QObjectXmlModel::qObjectSibling(const int pos, const QXmlNodeModelIndex &n) const
+{
+ Q_ASSERT(pos == 1 || pos == -1);
+ Q_ASSERT(asQObject(n));
+
+ const QObject *parent = asQObject(n)->parent();
+ if (parent) {
+ const QList<QObject *> &children = parent->children();
+ const int siblingPos = children.indexOf(asQObject(n)) + pos;
+
+ if (siblingPos >= 0 && siblingPos < children.count())
+ return createIndex(children.at(siblingPos));
+ else
+ return QXmlNodeModelIndex();
+ }
+ else
+ return QXmlNodeModelIndex();
+}
+//! [5]
+
+//! [1]
+QObjectXmlModel::QObjectNodeType QObjectXmlModel::toNodeType(const QXmlNodeModelIndex &n)
+{
+ return QObjectNodeType(n.additionalData() & (15 << 26));
+}
+//! [1]
+
+//! [9]
+QObjectXmlModel::AllMetaObjects QObjectXmlModel::allMetaObjects() const
+{
+ QXmlQuery query(namePool());
+ query.bindVariable("root", root());
+ query.setQuery("declare variable $root external;"
+ "$root/descendant-or-self::QObject");
+ Q_ASSERT(query.isValid());
+
+ QXmlResultItems result;
+ query.evaluateTo(&result);
+ QXmlItem i(result.next());
+
+ AllMetaObjects objects;
+ while (!i.isNull()) {
+ const QMetaObject *moo = asQObject(i.toNodeModelIndex())->metaObject();
+ while (moo) {
+ if (!objects.contains(moo))
+ objects.append(moo);
+ moo = moo->superClass();
+ }
+ i = result.next();
+ }
+
+ Q_ASSERT(!objects.contains(0));
+ return objects;
+}
+//! [9]
+
+QXmlNodeModelIndex QObjectXmlModel::metaObjectSibling(const int pos, const QXmlNodeModelIndex &n) const
+{
+ Q_ASSERT(pos == 1 || pos == -1);
+ Q_ASSERT(!n.isNull());
+
+ const int indexOf = m_allMetaObjects.indexOf(static_cast<const QMetaObject *>(n.internalPointer())) + pos;
+
+ if (indexOf >= 0 && indexOf < m_allMetaObjects.count())
+ return createIndex(const_cast<QMetaObject *>(m_allMetaObjects.at(indexOf)), MetaObject);
+ else
+ return QXmlNodeModelIndex();
+}
+
+//! [2]
+QXmlNodeModelIndex QObjectXmlModel::nextFromSimpleAxis(SimpleAxis axis, const QXmlNodeModelIndex &n) const
+{
+ switch (toNodeType(n))
+ {
+ case IsQObject:
+ {
+ switch (axis)
+ {
+ case Parent:
+ return createIndex(asQObject(n)->parent());
+
+ case FirstChild:
+ {
+ if (!asQObject(n) || asQObject(n)->children().isEmpty())
+ return QXmlNodeModelIndex();
+ else
+ return createIndex(asQObject(n)->children().first());
+ }
+
+ case NextSibling:
+ return qObjectSibling(1, n);
+
+//! [10]
+ case PreviousSibling:
+ {
+ if (asQObject(n) == m_root)
+ return createIndex(qint64(0), MetaObjects);
+ else
+ return qObjectSibling(-1, n);
+ }
+//! [10]
+ }
+ Q_ASSERT(false);
+ }
+
+//! [7]
+ case QObjectClassName:
+ case QObjectProperty:
+ {
+ Q_ASSERT(axis == Parent);
+ return createIndex(asQObject(n));
+ }
+//! [7]
+//! [2]
+//! [3]
+
+//! [11]
+ case MetaObjects:
+ {
+ switch (axis)
+ {
+ case Parent:
+ return QXmlNodeModelIndex();
+ case PreviousSibling:
+ return QXmlNodeModelIndex();
+ case NextSibling:
+ return root();
+ case FirstChild:
+ {
+ return createIndex(const_cast<QMetaObject*>(m_allMetaObjects.first()),MetaObject);
+ }
+ }
+ Q_ASSERT(false);
+ }
+//! [11]
+
+ case MetaObject:
+ {
+ switch (axis)
+ {
+ case FirstChild:
+ return QXmlNodeModelIndex();
+ case Parent:
+ return createIndex(qint64(0), MetaObjects);
+ case PreviousSibling:
+ return metaObjectSibling(-1, n);
+ case NextSibling:
+ return metaObjectSibling(1, n);
+ }
+ }
+
+ case MetaObjectClassName:
+ case MetaObjectSuperClass:
+ {
+ Q_ASSERT(axis == Parent);
+ return createIndex(asQObject(n), MetaObject);
+ }
+//! [3]
+//! [4]
+ }
+
+ Q_ASSERT(false);
+ return QXmlNodeModelIndex();
+}
+//! [4]
+
+//! [6]
+QVector<QXmlNodeModelIndex> QObjectXmlModel::attributes(const QXmlNodeModelIndex& n) const
+{
+ QVector<QXmlNodeModelIndex> result;
+ QObject *const object = asQObject(n);
+
+ switch(toNodeType(n))
+ {
+ case IsQObject:
+ {
+ const QMetaObject *const metaObject = object->metaObject();
+ const int count = metaObject->propertyCount();
+ result.append(createIndex(object, QObjectClassName));
+
+ for (int i = 0; i < count; ++i) {
+ const QMetaProperty qmp(metaObject->property(i));
+ const int ii = metaObject->indexOfProperty(qmp.name());
+ if (i == ii)
+ result.append(createIndex(object, QObjectProperty | i));
+ }
+ return result;
+ }
+//! [6]
+
+ case MetaObject:
+ {
+ result.append(createIndex(object, MetaObjectClassName));
+ result.append(createIndex(object, MetaObjectSuperClass));
+ return result;
+ }
+//! [8]
+ default:
+ return QVector<QXmlNodeModelIndex>();
+ }
+}
+//! [8]
+
+QObject *QObjectXmlModel::asQObject(const QXmlNodeModelIndex &n)
+{
+ return static_cast<QObject *>(n.internalPointer());
+}
+
+bool QObjectXmlModel::isProperty(const QXmlNodeModelIndex n)
+{
+ return n.additionalData() & QObjectProperty;
+}
+
+QUrl QObjectXmlModel::documentUri(const QXmlNodeModelIndex& ) const
+{
+ return m_baseURI;
+}
+
+QXmlNodeModelIndex::NodeKind QObjectXmlModel::kind(const QXmlNodeModelIndex& n) const
+{
+ switch (toNodeType(n))
+ {
+ case IsQObject:
+ case MetaObject:
+ case MetaObjects:
+ return QXmlNodeModelIndex::Element;
+
+ case QObjectProperty:
+ case MetaObjectClassName:
+ case MetaObjectSuperClass:
+ case QObjectClassName:
+ return QXmlNodeModelIndex::Attribute;
+ }
+
+ Q_ASSERT(false);
+ return QXmlNodeModelIndex::Element;
+}
+
+QXmlNodeModelIndex::DocumentOrder QObjectXmlModel::compareOrder(const QXmlNodeModelIndex& , const QXmlNodeModelIndex& ) const
+{
+ return QXmlNodeModelIndex::Follows; // TODO
+}
+
+//! [0]
+QXmlNodeModelIndex QObjectXmlModel::root() const
+{
+ return createIndex(m_root);
+}
+//! [0]
+
+QXmlNodeModelIndex QObjectXmlModel::root(const QXmlNodeModelIndex& n) const
+{
+ QObject *p = asQObject(n);
+ Q_ASSERT(p);
+
+ do {
+ QObject *const candidate = p->parent();
+ if (candidate)
+ p = candidate;
+ else
+ break;
+ }
+ while (true);
+
+ return createIndex(p);
+}
+
+/*!
+ We simply throw all of them into a QList and
+ return an iterator over it.
+ */
+QXmlNodeModelIndex::List QObjectXmlModel::ancestors(const QXmlNodeModelIndex n) const
+{
+ const QObject *p = asQObject(n);
+ Q_ASSERT(p);
+
+ QXmlNodeModelIndex::List result;
+ do {
+ QObject *const candidate = p->parent();
+ if (candidate) {
+ result.append(createIndex(candidate, 0));
+ p = candidate;
+ }
+ else
+ break;
+ }
+ while (true);
+
+ return result;
+}
+
+QMetaProperty QObjectXmlModel::toMetaProperty(const QXmlNodeModelIndex &n)
+{
+ const int propertyOffset = n.additionalData() & (~QObjectProperty);
+ const QObject *const qo = asQObject(n);
+ return qo->metaObject()->property(propertyOffset);
+}
+
+QXmlName QObjectXmlModel::name(const QXmlNodeModelIndex &n) const
+{
+ switch (toNodeType(n))
+ {
+ case IsQObject:
+ return QXmlName(namePool(), QLatin1String("QObject"));
+ case MetaObject:
+ return QXmlName(namePool(), QLatin1String("metaObject"));
+ case QObjectClassName:
+ case MetaObjectClassName:
+ return QXmlName(namePool(), QLatin1String("className"));
+ case QObjectProperty:
+ return QXmlName(namePool(), toMetaProperty(n).name());
+ case MetaObjects:
+ return QXmlName(namePool(), QLatin1String("metaObjects"));
+ case MetaObjectSuperClass:
+ return QXmlName(namePool(), QLatin1String("superClass"));
+ }
+
+ Q_ASSERT(false);
+ return QXmlName();
+}
+
+QVariant QObjectXmlModel::typedValue(const QXmlNodeModelIndex &n) const
+{
+ switch (toNodeType(n))
+ {
+ case QObjectProperty:
+ {
+ const QVariant &candidate = toMetaProperty(n).read(asQObject(n));
+ if (isTypeSupported(candidate.type()))
+ return candidate;
+ else
+ return QVariant();
+ }
+
+ case MetaObjectClassName:
+ return QVariant(static_cast<QMetaObject*>(n.internalPointer())->className());
+
+ case MetaObjectSuperClass:
+ {
+ const QMetaObject *const superClass = static_cast<QMetaObject*>(n.internalPointer())->superClass();
+ if (superClass)
+ return QVariant(superClass->className());
+ else
+ return QVariant();
+ }
+
+ case QObjectClassName:
+ return QVariant(asQObject(n)->metaObject()->className());
+
+ default:
+ return QVariant();
+ }
+}
+
+/*!
+ Returns \c true if QVariants of type \a type can be used
+ in QtXmlPatterns, otherwise \c false.
+ */
+bool QObjectXmlModel::isTypeSupported(QVariant::Type type)
+{
+ /* See data/qatomicvalue.cpp too. */
+ switch (type)
+ {
+ /* Fallthrough all these. */
+ case QVariant::Char:
+ case QVariant::String:
+ case QVariant::Url:
+ case QVariant::Bool:
+ case QVariant::ByteArray:
+ case QVariant::Int:
+ case QVariant::LongLong:
+ case QVariant::ULongLong:
+ case QVariant::Date:
+ case QVariant::DateTime:
+ case QVariant::Time:
+ case QVariant::Double:
+ return true;
+ default:
+ return false;
+ }
+}
+
+QT_END_NAMESPACE