--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/declarative/graphicsitems/qdeclarativevisualitemmodel.cpp Tue Jul 06 15:10:48 2010 +0300
@@ -0,0 +1,1391 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module 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 "private/qdeclarativevisualitemmodel_p.h"
+
+#include "qdeclarativeitem.h"
+
+#include <qdeclarativecontext.h>
+#include <qdeclarativecontext_p.h>
+#include <qdeclarativeengine.h>
+#include <qdeclarativeexpression.h>
+#include <qdeclarativepackage_p.h>
+#include <qdeclarativeopenmetaobject_p.h>
+#include <qdeclarativelistaccessor_p.h>
+#include <qdeclarativeinfo.h>
+#include <qdeclarativedata_p.h>
+#include <qdeclarativepropertycache_p.h>
+#include <qdeclarativeguard_p.h>
+#include <qdeclarativeglobal_p.h>
+
+#include <qgraphicsscene.h>
+#include <qlistmodelinterface_p.h>
+#include <qhash.h>
+#include <qlist.h>
+#include <qmetaobjectbuilder_p.h>
+#include <QtCore/qdebug.h>
+
+#include <private/qobject_p.h>
+
+QT_BEGIN_NAMESPACE
+
+QHash<QObject*, QDeclarativeVisualItemModelAttached*> QDeclarativeVisualItemModelAttached::attachedProperties;
+
+
+class QDeclarativeVisualItemModelPrivate : public QObjectPrivate
+{
+ Q_DECLARE_PUBLIC(QDeclarativeVisualItemModel)
+public:
+ QDeclarativeVisualItemModelPrivate() : QObjectPrivate() {}
+
+ static void children_append(QDeclarativeListProperty<QDeclarativeItem> *prop, QDeclarativeItem *item) {
+ item->QObject::setParent(prop->object);
+ static_cast<QDeclarativeVisualItemModelPrivate *>(prop->data)->children.append(item);
+ static_cast<QDeclarativeVisualItemModelPrivate *>(prop->data)->itemAppended();
+ static_cast<QDeclarativeVisualItemModelPrivate *>(prop->data)->emitChildrenChanged();
+ }
+
+ static int children_count(QDeclarativeListProperty<QDeclarativeItem> *prop) {
+ return static_cast<QDeclarativeVisualItemModelPrivate *>(prop->data)->children.count();
+ }
+
+ static QDeclarativeItem *children_at(QDeclarativeListProperty<QDeclarativeItem> *prop, int index) {
+ return static_cast<QDeclarativeVisualItemModelPrivate *>(prop->data)->children.at(index);
+ }
+
+ void itemAppended() {
+ Q_Q(QDeclarativeVisualItemModel);
+ QDeclarativeVisualItemModelAttached *attached = QDeclarativeVisualItemModelAttached::properties(children.last());
+ attached->setIndex(children.count()-1);
+ emit q->itemsInserted(children.count()-1, 1);
+ emit q->countChanged();
+ }
+
+ void emitChildrenChanged() {
+ Q_Q(QDeclarativeVisualItemModel);
+ emit q->childrenChanged();
+ }
+
+ QList<QDeclarativeItem *> children;
+};
+
+
+/*!
+ \qmlclass VisualItemModel QDeclarativeVisualItemModel
+ \since 4.7
+ \brief The VisualItemModel allows items to be provided to a view.
+
+ The children of the VisualItemModel are provided in a model which
+ can be used in a view. Note that no delegate should be
+ provided to a view since the VisualItemModel contains the
+ visual delegate (items).
+
+ An item can determine its index within the
+ model via the VisualItemModel.index attached property.
+
+ The example below places three colored rectangles in a ListView.
+ \code
+ Item {
+ VisualItemModel {
+ id: itemModel
+ Rectangle { height: 30; width: 80; color: "red" }
+ Rectangle { height: 30; width: 80; color: "green" }
+ Rectangle { height: 30; width: 80; color: "blue" }
+ }
+
+ ListView {
+ anchors.fill: parent
+ model: itemModel
+ }
+ }
+ \endcode
+*/
+QDeclarativeVisualItemModel::QDeclarativeVisualItemModel(QObject *parent)
+ : QDeclarativeVisualModel(*(new QDeclarativeVisualItemModelPrivate), parent)
+{
+}
+
+QDeclarativeListProperty<QDeclarativeItem> QDeclarativeVisualItemModel::children()
+{
+ Q_D(QDeclarativeVisualItemModel);
+ return QDeclarativeListProperty<QDeclarativeItem>(this, d, d->children_append,
+ d->children_count, d->children_at);
+}
+
+/*!
+ \qmlproperty int VisualItemModel::count
+
+ The number of items in the model. This property is readonly.
+*/
+int QDeclarativeVisualItemModel::count() const
+{
+ Q_D(const QDeclarativeVisualItemModel);
+ return d->children.count();
+}
+
+bool QDeclarativeVisualItemModel::isValid() const
+{
+ return true;
+}
+
+QDeclarativeItem *QDeclarativeVisualItemModel::item(int index, bool)
+{
+ Q_D(QDeclarativeVisualItemModel);
+ return d->children.at(index);
+}
+
+QDeclarativeVisualModel::ReleaseFlags QDeclarativeVisualItemModel::release(QDeclarativeItem *)
+{
+ // Nothing to do
+ return 0;
+}
+
+bool QDeclarativeVisualItemModel::completePending() const
+{
+ return false;
+}
+
+void QDeclarativeVisualItemModel::completeItem()
+{
+ // Nothing to do
+}
+
+QString QDeclarativeVisualItemModel::stringValue(int index, const QString &name)
+{
+ Q_D(QDeclarativeVisualItemModel);
+ if (index < 0 || index >= d->children.count())
+ return QString();
+ return QDeclarativeEngine::contextForObject(d->children.at(index))->contextProperty(name).toString();
+}
+
+QVariant QDeclarativeVisualItemModel::evaluate(int index, const QString &expression, QObject *objectContext)
+{
+ Q_D(QDeclarativeVisualItemModel);
+ if (index < 0 || index >= d->children.count())
+ return QVariant();
+ QDeclarativeContext *ccontext = qmlContext(this);
+ QDeclarativeContext *ctxt = new QDeclarativeContext(ccontext);
+ ctxt->setContextObject(d->children.at(index));
+ QDeclarativeExpression e(ctxt, objectContext, expression);
+ QVariant value = e.evaluate();
+ delete ctxt;
+ return value;
+}
+
+int QDeclarativeVisualItemModel::indexOf(QDeclarativeItem *item, QObject *) const
+{
+ Q_D(const QDeclarativeVisualItemModel);
+ return d->children.indexOf(item);
+}
+
+QDeclarativeVisualItemModelAttached *QDeclarativeVisualItemModel::qmlAttachedProperties(QObject *obj)
+{
+ return QDeclarativeVisualItemModelAttached::properties(obj);
+}
+
+//============================================================================
+
+class VDMDelegateDataType : public QDeclarativeOpenMetaObjectType
+{
+public:
+ VDMDelegateDataType(const QMetaObject *base, QDeclarativeEngine *engine) : QDeclarativeOpenMetaObjectType(base, engine) {}
+
+ void propertyCreated(int, QMetaPropertyBuilder &prop) {
+ prop.setWritable(false);
+ }
+};
+
+class QDeclarativeVisualDataModelParts;
+class QDeclarativeVisualDataModelData;
+class QDeclarativeVisualDataModelPrivate : public QObjectPrivate
+{
+public:
+ QDeclarativeVisualDataModelPrivate(QDeclarativeContext *);
+
+ static QDeclarativeVisualDataModelPrivate *get(QDeclarativeVisualDataModel *m) {
+ return static_cast<QDeclarativeVisualDataModelPrivate *>(QObjectPrivate::get(m));
+ }
+
+ QDeclarativeGuard<QListModelInterface> m_listModelInterface;
+ QDeclarativeGuard<QAbstractItemModel> m_abstractItemModel;
+ QDeclarativeGuard<QDeclarativeVisualDataModel> m_visualItemModel;
+ QString m_part;
+
+ QDeclarativeComponent *m_delegate;
+ QDeclarativeGuard<QDeclarativeContext> m_context;
+ QList<int> m_roles;
+ QHash<QByteArray,int> m_roleNames;
+ void ensureRoles() {
+ if (m_roleNames.isEmpty()) {
+ if (m_listModelInterface) {
+ m_roles = m_listModelInterface->roles();
+ for (int ii = 0; ii < m_roles.count(); ++ii)
+ m_roleNames.insert(m_listModelInterface->toString(m_roles.at(ii)).toUtf8(), m_roles.at(ii));
+ if (m_roles.count() == 1)
+ m_roleNames.insert("modelData", m_roles.at(0));
+ } else if (m_abstractItemModel) {
+ for (QHash<int,QByteArray>::const_iterator it = m_abstractItemModel->roleNames().begin();
+ it != m_abstractItemModel->roleNames().end(); ++it) {
+ m_roles.append(it.key());
+ m_roleNames.insert(*it, it.key());
+ }
+ if (m_roles.count() == 1)
+ m_roleNames.insert("modelData", m_roles.at(0));
+ if (m_roles.count())
+ m_roleNames.insert("hasModelChildren", 0);
+ } else if (m_listAccessor) {
+ m_roleNames.insert("modelData", 0);
+ if (m_listAccessor->type() == QDeclarativeListAccessor::Instance) {
+ if (QObject *object = m_listAccessor->at(0).value<QObject*>()) {
+ int count = object->metaObject()->propertyCount();
+ for (int ii = 1; ii < count; ++ii) {
+ const QMetaProperty &prop = object->metaObject()->property(ii);
+ m_roleNames.insert(prop.name(), 0);
+ }
+ }
+ }
+ }
+ }
+ }
+
+ QHash<int,int> roleToPropId;
+ void createMetaData() {
+ if (!m_metaDataCreated) {
+ ensureRoles();
+ if (m_roleNames.count()) {
+ QHash<QByteArray, int>::const_iterator it = m_roleNames.begin();
+ while (it != m_roleNames.end()) {
+ int propId = m_delegateDataType->createProperty(it.key()) - m_delegateDataType->propertyOffset();
+ roleToPropId.insert(*it, propId);
+ ++it;
+ }
+ m_metaDataCreated = true;
+ }
+ }
+ }
+
+ struct ObjectRef {
+ ObjectRef(QObject *object=0) : obj(object), ref(1) {}
+ QObject *obj;
+ int ref;
+ };
+ class Cache : public QHash<int, ObjectRef> {
+ public:
+ QObject *getItem(int index) {
+ QObject *item = 0;
+ QHash<int,ObjectRef>::iterator it = find(index);
+ if (it != end()) {
+ (*it).ref++;
+ item = (*it).obj;
+ }
+ return item;
+ }
+ QObject *item(int index) {
+ QObject *item = 0;
+ QHash<int, ObjectRef>::const_iterator it = find(index);
+ if (it != end())
+ item = (*it).obj;
+ return item;
+ }
+ void insertItem(int index, QObject *obj) {
+ insert(index, ObjectRef(obj));
+ }
+ bool releaseItem(QObject *obj) {
+ QHash<int, ObjectRef>::iterator it = begin();
+ for (; it != end(); ++it) {
+ ObjectRef &objRef = *it;
+ if (objRef.obj == obj) {
+ if (--objRef.ref == 0) {
+ erase(it);
+ return true;
+ }
+ break;
+ }
+ }
+ return false;
+ }
+ };
+
+ int modelCount() const {
+ if (m_visualItemModel)
+ return m_visualItemModel->count();
+ if (m_listModelInterface)
+ return m_listModelInterface->count();
+ if (m_abstractItemModel)
+ return m_abstractItemModel->rowCount(m_root);
+ if (m_listAccessor)
+ return m_listAccessor->count();
+ return 0;
+ }
+
+ Cache m_cache;
+ QHash<QObject *, QDeclarativePackage*> m_packaged;
+
+ QDeclarativeVisualDataModelParts *m_parts;
+ friend class QDeclarativeVisualItemParts;
+
+ VDMDelegateDataType *m_delegateDataType;
+ friend class QDeclarativeVisualDataModelData;
+ bool m_metaDataCreated : 1;
+ bool m_metaDataCacheable : 1;
+ bool m_delegateValidated : 1;
+ bool m_completePending : 1;
+
+ QDeclarativeVisualDataModelData *data(QObject *item);
+
+ QVariant m_modelVariant;
+ QDeclarativeListAccessor *m_listAccessor;
+
+ QModelIndex m_root;
+};
+
+class QDeclarativeVisualDataModelDataMetaObject : public QDeclarativeOpenMetaObject
+{
+public:
+ QDeclarativeVisualDataModelDataMetaObject(QObject *parent, QDeclarativeOpenMetaObjectType *type)
+ : QDeclarativeOpenMetaObject(parent, type) {}
+
+ virtual QVariant initialValue(int);
+ virtual int createProperty(const char *, const char *);
+
+private:
+ friend class QDeclarativeVisualDataModelData;
+};
+
+class QDeclarativeVisualDataModelData : public QObject
+{
+Q_OBJECT
+public:
+ QDeclarativeVisualDataModelData(int index, QDeclarativeVisualDataModel *model);
+ ~QDeclarativeVisualDataModelData();
+
+ Q_PROPERTY(int index READ index NOTIFY indexChanged)
+ int index() const;
+ void setIndex(int index);
+
+ int propForRole(int) const;
+ void setValue(int, const QVariant &);
+
+ void ensureProperties();
+
+Q_SIGNALS:
+ void indexChanged();
+
+private:
+ friend class QDeclarativeVisualDataModelDataMetaObject;
+ int m_index;
+ QDeclarativeGuard<QDeclarativeVisualDataModel> m_model;
+ QDeclarativeVisualDataModelDataMetaObject *m_meta;
+};
+
+int QDeclarativeVisualDataModelData::propForRole(int id) const
+{
+ QDeclarativeVisualDataModelPrivate *model = QDeclarativeVisualDataModelPrivate::get(m_model);
+ QHash<int,int>::const_iterator it = model->roleToPropId.find(id);
+ if (it != model->roleToPropId.end())
+ return *it;
+
+ return -1;
+}
+
+void QDeclarativeVisualDataModelData::setValue(int id, const QVariant &val)
+{
+ m_meta->setValue(id, val);
+}
+
+int QDeclarativeVisualDataModelDataMetaObject::createProperty(const char *name, const char *type)
+{
+ QDeclarativeVisualDataModelData *data =
+ static_cast<QDeclarativeVisualDataModelData *>(object());
+
+ if (!data->m_model)
+ return -1;
+
+ QDeclarativeVisualDataModelPrivate *model = QDeclarativeVisualDataModelPrivate::get(data->m_model);
+ if (data->m_index < 0 || data->m_index >= model->modelCount())
+ return -1;
+
+ if ((!model->m_listModelInterface || !model->m_abstractItemModel) && model->m_listAccessor) {
+ if (model->m_listAccessor->type() == QDeclarativeListAccessor::ListProperty) {
+ model->ensureRoles();
+ if (qstrcmp(name,"modelData") == 0)
+ return QDeclarativeOpenMetaObject::createProperty(name, type);
+ }
+ }
+ return -1;
+}
+
+QVariant QDeclarativeVisualDataModelDataMetaObject::initialValue(int propId)
+{
+ QDeclarativeVisualDataModelData *data =
+ static_cast<QDeclarativeVisualDataModelData *>(object());
+
+ Q_ASSERT(data->m_model);
+ QDeclarativeVisualDataModelPrivate *model = QDeclarativeVisualDataModelPrivate::get(data->m_model);
+
+ QByteArray propName = name(propId);
+ if ((!model->m_listModelInterface || !model->m_abstractItemModel) && model->m_listAccessor) {
+ if (propName == "modelData") {
+ if (model->m_listAccessor->type() == QDeclarativeListAccessor::Instance) {
+ QObject *object = model->m_listAccessor->at(0).value<QObject*>();
+ return object->metaObject()->property(1).read(object); // the first property after objectName
+ }
+ return model->m_listAccessor->at(data->m_index);
+ } else {
+ // return any property of a single object instance.
+ QObject *object = model->m_listAccessor->at(data->m_index).value<QObject*>();
+ return object->property(propName);
+ }
+ } else if (model->m_listModelInterface) {
+ model->ensureRoles();
+ QHash<QByteArray,int>::const_iterator it = model->m_roleNames.find(propName);
+ if (it != model->m_roleNames.end()) {
+ QVariant value = model->m_listModelInterface->data(data->m_index, *it);
+ return value;
+ } else if (model->m_roles.count() == 1 && propName == "modelData") {
+ //for compatability with other lists, assign modelData if there is only a single role
+ QVariant value = model->m_listModelInterface->data(data->m_index, model->m_roles.first());
+ return value;
+ }
+ } else if (model->m_abstractItemModel) {
+ model->ensureRoles();
+ if (propName == "hasModelChildren") {
+ QModelIndex index = model->m_abstractItemModel->index(data->m_index, 0, model->m_root);
+ return model->m_abstractItemModel->hasChildren(index);
+ } else {
+ QHash<QByteArray,int>::const_iterator it = model->m_roleNames.find(propName);
+ if (it != model->m_roleNames.end()) {
+ QModelIndex index = model->m_abstractItemModel->index(data->m_index, 0, model->m_root);
+ return model->m_abstractItemModel->data(index, *it);
+ }
+ }
+ }
+ Q_ASSERT(!"Can never be reached");
+ return QVariant();
+}
+
+QDeclarativeVisualDataModelData::QDeclarativeVisualDataModelData(int index,
+ QDeclarativeVisualDataModel *model)
+: m_index(index), m_model(model),
+m_meta(new QDeclarativeVisualDataModelDataMetaObject(this, QDeclarativeVisualDataModelPrivate::get(model)->m_delegateDataType))
+{
+ ensureProperties();
+}
+
+QDeclarativeVisualDataModelData::~QDeclarativeVisualDataModelData()
+{
+}
+
+void QDeclarativeVisualDataModelData::ensureProperties()
+{
+ QDeclarativeVisualDataModelPrivate *modelPriv = QDeclarativeVisualDataModelPrivate::get(m_model);
+ if (modelPriv->m_metaDataCacheable && !modelPriv->m_metaDataCreated) {
+ modelPriv->createMetaData();
+ if (modelPriv->m_metaDataCreated)
+ m_meta->setCached(true);
+ }
+}
+
+int QDeclarativeVisualDataModelData::index() const
+{
+ return m_index;
+}
+
+// This is internal only - it should not be set from qml
+void QDeclarativeVisualDataModelData::setIndex(int index)
+{
+ m_index = index;
+ emit indexChanged();
+}
+
+//---------------------------------------------------------------------------
+
+class QDeclarativeVisualDataModelPartsMetaObject : public QDeclarativeOpenMetaObject
+{
+public:
+ QDeclarativeVisualDataModelPartsMetaObject(QObject *parent)
+ : QDeclarativeOpenMetaObject(parent) {}
+
+ virtual void propertyCreated(int, QMetaPropertyBuilder &);
+ virtual QVariant initialValue(int);
+};
+
+class QDeclarativeVisualDataModelParts : public QObject
+{
+Q_OBJECT
+public:
+ QDeclarativeVisualDataModelParts(QDeclarativeVisualDataModel *parent);
+
+private:
+ friend class QDeclarativeVisualDataModelPartsMetaObject;
+ QDeclarativeVisualDataModel *model;
+};
+
+void QDeclarativeVisualDataModelPartsMetaObject::propertyCreated(int, QMetaPropertyBuilder &prop)
+{
+ prop.setWritable(false);
+}
+
+QVariant QDeclarativeVisualDataModelPartsMetaObject::initialValue(int id)
+{
+ QDeclarativeVisualDataModel *m = new QDeclarativeVisualDataModel;
+ m->setParent(object());
+ m->setPart(QString::fromUtf8(name(id)));
+ m->setModel(QVariant::fromValue(static_cast<QDeclarativeVisualDataModelParts *>(object())->model));
+
+ QVariant var = QVariant::fromValue((QObject *)m);
+ return var;
+}
+
+QDeclarativeVisualDataModelParts::QDeclarativeVisualDataModelParts(QDeclarativeVisualDataModel *parent)
+: QObject(parent), model(parent)
+{
+ new QDeclarativeVisualDataModelPartsMetaObject(this);
+}
+
+QDeclarativeVisualDataModelPrivate::QDeclarativeVisualDataModelPrivate(QDeclarativeContext *ctxt)
+: m_listModelInterface(0), m_abstractItemModel(0), m_visualItemModel(0), m_delegate(0)
+, m_context(ctxt), m_parts(0), m_delegateDataType(0), m_metaDataCreated(false)
+, m_metaDataCacheable(false), m_delegateValidated(false), m_completePending(false), m_listAccessor(0)
+{
+}
+
+QDeclarativeVisualDataModelData *QDeclarativeVisualDataModelPrivate::data(QObject *item)
+{
+ QDeclarativeVisualDataModelData *dataItem =
+ item->findChild<QDeclarativeVisualDataModelData *>();
+ Q_ASSERT(dataItem);
+ return dataItem;
+}
+
+//---------------------------------------------------------------------------
+
+/*!
+ \qmlclass VisualDataModel QDeclarativeVisualDataModel
+ \brief The VisualDataModel encapsulates a model and delegate
+
+ A VisualDataModel encapsulates a model and the delegate that will
+ be instantiated for items in the model.
+
+ It is usually not necessary to create a VisualDataModel directly,
+ since the QML views will create one internally.
+
+ The example below illustrates using a VisualDataModel with a ListView.
+
+ \code
+ VisualDataModel {
+ id: visualModel
+ model: myModel
+ delegate: Component {
+ Rectangle {
+ height: 25
+ width: 100
+ Text { text: "Name:" + name}
+ }
+ }
+ }
+ ListView {
+ width: 100
+ height: 100
+ anchors.fill: parent
+ model: visualModel
+ }
+ \endcode
+*/
+
+QDeclarativeVisualDataModel::QDeclarativeVisualDataModel()
+: QDeclarativeVisualModel(*(new QDeclarativeVisualDataModelPrivate(0)))
+{
+}
+
+QDeclarativeVisualDataModel::QDeclarativeVisualDataModel(QDeclarativeContext *ctxt, QObject *parent)
+: QDeclarativeVisualModel(*(new QDeclarativeVisualDataModelPrivate(ctxt)), parent)
+{
+}
+
+QDeclarativeVisualDataModel::~QDeclarativeVisualDataModel()
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (d->m_listAccessor)
+ delete d->m_listAccessor;
+ if (d->m_delegateDataType)
+ d->m_delegateDataType->release();
+}
+
+/*!
+ \qmlproperty model VisualDataModel::model
+ This property holds the model providing data for the VisualDataModel.
+
+ The model provides a set of data that is used to create the items
+ for a view. For large or dynamic datasets the model is usually
+ provided by a C++ model object. The C++ model object must be a \l
+ {QAbstractItemModel} subclass or a simple list.
+
+ Models can also be created directly in QML, using a \l{ListModel} or
+ \l{XmlListModel}.
+
+ \sa {qmlmodels}{Data Models}
+*/
+QVariant QDeclarativeVisualDataModel::model() const
+{
+ Q_D(const QDeclarativeVisualDataModel);
+ return d->m_modelVariant;
+}
+
+void QDeclarativeVisualDataModel::setModel(const QVariant &model)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ delete d->m_listAccessor;
+ d->m_listAccessor = 0;
+ d->m_modelVariant = model;
+ if (d->m_listModelInterface) {
+ // Assume caller has released all items.
+ QObject::disconnect(d->m_listModelInterface, SIGNAL(itemsChanged(int,int,QList<int>)),
+ this, SLOT(_q_itemsChanged(int,int,QList<int>)));
+ QObject::disconnect(d->m_listModelInterface, SIGNAL(itemsInserted(int,int)),
+ this, SLOT(_q_itemsInserted(int,int)));
+ QObject::disconnect(d->m_listModelInterface, SIGNAL(itemsRemoved(int,int)),
+ this, SLOT(_q_itemsRemoved(int,int)));
+ QObject::disconnect(d->m_listModelInterface, SIGNAL(itemsMoved(int,int,int)),
+ this, SLOT(_q_itemsMoved(int,int,int)));
+ d->m_listModelInterface = 0;
+ } else if (d->m_abstractItemModel) {
+ QObject::disconnect(d->m_abstractItemModel, SIGNAL(rowsInserted(const QModelIndex &,int,int)),
+ this, SLOT(_q_rowsInserted(const QModelIndex &,int,int)));
+ QObject::disconnect(d->m_abstractItemModel, SIGNAL(rowsRemoved(const QModelIndex &,int,int)),
+ this, SLOT(_q_rowsRemoved(const QModelIndex &,int,int)));
+ QObject::disconnect(d->m_abstractItemModel, SIGNAL(dataChanged(const QModelIndex&,const QModelIndex&)),
+ this, SLOT(_q_dataChanged(const QModelIndex&,const QModelIndex&)));
+ QObject::disconnect(d->m_abstractItemModel, SIGNAL(rowsMoved(const QModelIndex&,int,int,const QModelIndex&,int)),
+ this, SLOT(_q_rowsMoved(const QModelIndex&,int,int,const QModelIndex&,int)));
+ QObject::disconnect(d->m_abstractItemModel, SIGNAL(modelReset()), this, SLOT(_q_modelReset()));
+ } else if (d->m_visualItemModel) {
+ QObject::disconnect(d->m_visualItemModel, SIGNAL(itemsInserted(int,int)),
+ this, SIGNAL(itemsInserted(int,int)));
+ QObject::disconnect(d->m_visualItemModel, SIGNAL(itemsRemoved(int,int)),
+ this, SIGNAL(itemsRemoved(int,int)));
+ QObject::disconnect(d->m_visualItemModel, SIGNAL(itemsMoved(int,int,int)),
+ this, SIGNAL(itemsMoved(int,int,int)));
+ QObject::disconnect(d->m_visualItemModel, SIGNAL(createdPackage(int,QDeclarativePackage*)),
+ this, SLOT(_q_createdPackage(int,QDeclarativePackage*)));
+ QObject::disconnect(d->m_visualItemModel, SIGNAL(destroyingPackage(QDeclarativePackage*)),
+ this, SLOT(_q_destroyingPackage(QDeclarativePackage*)));
+ d->m_visualItemModel = 0;
+ }
+
+ d->m_roles.clear();
+ d->m_roleNames.clear();
+ if (d->m_delegateDataType)
+ d->m_delegateDataType->release();
+ d->m_metaDataCreated = 0;
+ d->m_metaDataCacheable = false;
+ d->m_delegateDataType = new VDMDelegateDataType(&QDeclarativeVisualDataModelData::staticMetaObject, d->m_context?d->m_context->engine():qmlEngine(this));
+
+ QObject *object = qvariant_cast<QObject *>(model);
+ if (object && (d->m_listModelInterface = qobject_cast<QListModelInterface *>(object))) {
+ QObject::connect(d->m_listModelInterface, SIGNAL(itemsChanged(int,int,QList<int>)),
+ this, SLOT(_q_itemsChanged(int,int,QList<int>)));
+ QObject::connect(d->m_listModelInterface, SIGNAL(itemsInserted(int,int)),
+ this, SLOT(_q_itemsInserted(int,int)));
+ QObject::connect(d->m_listModelInterface, SIGNAL(itemsRemoved(int,int)),
+ this, SLOT(_q_itemsRemoved(int,int)));
+ QObject::connect(d->m_listModelInterface, SIGNAL(itemsMoved(int,int,int)),
+ this, SLOT(_q_itemsMoved(int,int,int)));
+ d->m_metaDataCacheable = true;
+ if (d->m_delegate && d->m_listModelInterface->count())
+ emit itemsInserted(0, d->m_listModelInterface->count());
+ return;
+ } else if (object && (d->m_abstractItemModel = qobject_cast<QAbstractItemModel *>(object))) {
+ QObject::connect(d->m_abstractItemModel, SIGNAL(rowsInserted(const QModelIndex &,int,int)),
+ this, SLOT(_q_rowsInserted(const QModelIndex &,int,int)));
+ QObject::connect(d->m_abstractItemModel, SIGNAL(rowsRemoved(const QModelIndex &,int,int)),
+ this, SLOT(_q_rowsRemoved(const QModelIndex &,int,int)));
+ QObject::connect(d->m_abstractItemModel, SIGNAL(dataChanged(const QModelIndex&,const QModelIndex&)),
+ this, SLOT(_q_dataChanged(const QModelIndex&,const QModelIndex&)));
+ QObject::connect(d->m_abstractItemModel, SIGNAL(rowsMoved(const QModelIndex&,int,int,const QModelIndex&,int)),
+ this, SLOT(_q_rowsMoved(const QModelIndex&,int,int,const QModelIndex&,int)));
+ QObject::connect(d->m_abstractItemModel, SIGNAL(modelReset()), this, SLOT(_q_modelReset()));
+ d->m_metaDataCacheable = true;
+ return;
+ }
+ if ((d->m_visualItemModel = qvariant_cast<QDeclarativeVisualDataModel *>(model))) {
+ QObject::connect(d->m_visualItemModel, SIGNAL(itemsInserted(int,int)),
+ this, SIGNAL(itemsInserted(int,int)));
+ QObject::connect(d->m_visualItemModel, SIGNAL(itemsRemoved(int,int)),
+ this, SIGNAL(itemsRemoved(int,int)));
+ QObject::connect(d->m_visualItemModel, SIGNAL(itemsMoved(int,int,int)),
+ this, SIGNAL(itemsMoved(int,int,int)));
+ QObject::connect(d->m_visualItemModel, SIGNAL(createdPackage(int,QDeclarativePackage*)),
+ this, SLOT(_q_createdPackage(int,QDeclarativePackage*)));
+ QObject::connect(d->m_visualItemModel, SIGNAL(destroyingPackage(QDeclarativePackage*)),
+ this, SLOT(_q_destroyingPackage(QDeclarativePackage*)));
+ return;
+ }
+ d->m_listAccessor = new QDeclarativeListAccessor;
+ d->m_listAccessor->setList(model, d->m_context?d->m_context->engine():qmlEngine(this));
+ if (d->m_listAccessor->type() != QDeclarativeListAccessor::ListProperty)
+ d->m_metaDataCacheable = true;
+ if (d->m_delegate && d->modelCount()) {
+ emit itemsInserted(0, d->modelCount());
+ emit countChanged();
+ }
+}
+
+/*!
+ \qmlproperty Component VisualDataModel::delegate
+
+ The delegate provides a template defining each item instantiated by a view.
+ The index is exposed as an accessible \c index property. Properties of the
+ model are also available depending upon the type of \l {qmlmodels}{Data Model}.
+*/
+QDeclarativeComponent *QDeclarativeVisualDataModel::delegate() const
+{
+ Q_D(const QDeclarativeVisualDataModel);
+ if (d->m_visualItemModel)
+ return d->m_visualItemModel->delegate();
+ return d->m_delegate;
+}
+
+void QDeclarativeVisualDataModel::setDelegate(QDeclarativeComponent *delegate)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ bool wasValid = d->m_delegate != 0;
+ d->m_delegate = delegate;
+ d->m_delegateValidated = false;
+ if (!wasValid && d->modelCount() && d->m_delegate) {
+ emit itemsInserted(0, d->modelCount());
+ emit countChanged();
+ }
+ if (wasValid && !d->m_delegate && d->modelCount()) {
+ emit itemsRemoved(0, d->modelCount());
+ emit countChanged();
+ }
+}
+
+/*!
+ \qmlproperty QModelIndex VisualDataModel::rootIndex
+
+ QAbstractItemModel provides a heirachical tree of data, whereas
+ QML only operates on list data. \c rootIndex allows the children of
+ any node in a QAbstractItemModel to be provided by this model.
+
+ This property only affects models of type QAbstractItemModel.
+
+ \code
+ // main.cpp
+
+ int main(int argc, char ** argv)
+ {
+ QApplication app(argc, argv);
+
+ QDeclarativeView view;
+
+ QDirModel model;
+ view.rootContext()->setContextProperty("myModel", &model);
+
+ view.setSource(QUrl("qrc:view.qml"));
+ view.show();
+
+ return app.exec();
+ }
+
+ #include "main.moc"
+ \endcode
+
+ \code
+ // view.qml
+ import Qt 4.7
+
+ ListView {
+ id: view
+ width: 200
+ height: 200
+ model: VisualDataModel {
+ model: myModel
+ delegate: Component {
+ Rectangle {
+ height: 25; width: 200
+ Text { text: filePath }
+ MouseArea {
+ anchors.fill: parent;
+ onClicked: if (hasModelChildren) view.model.rootIndex = view.model.modelIndex(index)
+ }
+ }
+ }
+ }
+ }
+ \endcode
+
+ \sa modelIndex(), parentModelIndex()
+*/
+QVariant QDeclarativeVisualDataModel::rootIndex() const
+{
+ Q_D(const QDeclarativeVisualDataModel);
+ return QVariant::fromValue(d->m_root);
+}
+
+void QDeclarativeVisualDataModel::setRootIndex(const QVariant &root)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ QModelIndex modelIndex = qvariant_cast<QModelIndex>(root);
+ if (d->m_root != modelIndex) {
+ int oldCount = d->modelCount();
+ d->m_root = modelIndex;
+ int newCount = d->modelCount();
+ if (d->m_delegate && oldCount)
+ emit itemsRemoved(0, oldCount);
+ if (d->m_delegate && newCount)
+ emit itemsInserted(0, newCount);
+ if (newCount != oldCount)
+ emit countChanged();
+ emit rootIndexChanged();
+ }
+}
+
+
+/*!
+ \qmlmethod QModelIndex VisualDataModel::modelIndex(int index)
+
+ QAbstractItemModel provides a heirachical tree of data, whereas
+ QML only operates on list data. This function assists in using
+ tree models in QML.
+
+ Returns a QModelIndex for the specified index.
+ This value can be assigned to rootIndex.
+
+ \sa rootIndex
+*/
+QVariant QDeclarativeVisualDataModel::modelIndex(int idx) const
+{
+ Q_D(const QDeclarativeVisualDataModel);
+ if (d->m_abstractItemModel)
+ return QVariant::fromValue(d->m_abstractItemModel->index(idx, 0, d->m_root));
+ return QVariant::fromValue(QModelIndex());
+}
+
+/*!
+ \qmlmethod QModelIndex VisualDataModel::parentModelIndex()
+
+ QAbstractItemModel provides a heirachical tree of data, whereas
+ QML only operates on list data. This function assists in using
+ tree models in QML.
+
+ Returns a QModelIndex for the parent of the current rootIndex.
+ This value can be assigned to rootIndex.
+
+ \sa rootIndex
+*/
+QVariant QDeclarativeVisualDataModel::parentModelIndex() const
+{
+ Q_D(const QDeclarativeVisualDataModel);
+ if (d->m_abstractItemModel)
+ return QVariant::fromValue(d->m_abstractItemModel->parent(d->m_root));
+ return QVariant::fromValue(QModelIndex());
+}
+
+QString QDeclarativeVisualDataModel::part() const
+{
+ Q_D(const QDeclarativeVisualDataModel);
+ return d->m_part;
+}
+
+void QDeclarativeVisualDataModel::setPart(const QString &part)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ d->m_part = part;
+}
+
+int QDeclarativeVisualDataModel::count() const
+{
+ Q_D(const QDeclarativeVisualDataModel);
+ return d->modelCount();
+}
+
+QDeclarativeItem *QDeclarativeVisualDataModel::item(int index, bool complete)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (d->m_visualItemModel)
+ return d->m_visualItemModel->item(index, d->m_part.toUtf8(), complete);
+ return item(index, QByteArray(), complete);
+}
+
+/*
+ Returns ReleaseStatus flags.
+*/
+QDeclarativeVisualDataModel::ReleaseFlags QDeclarativeVisualDataModel::release(QDeclarativeItem *item)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (d->m_visualItemModel)
+ return d->m_visualItemModel->release(item);
+
+ ReleaseFlags stat = 0;
+ QObject *obj = item;
+ bool inPackage = false;
+
+ QHash<QObject*,QDeclarativePackage*>::iterator it = d->m_packaged.find(item);
+ if (it != d->m_packaged.end()) {
+ QDeclarativePackage *package = *it;
+ d->m_packaged.erase(it);
+ if (d->m_packaged.contains(item))
+ stat |= Referenced;
+ inPackage = true;
+ obj = package; // fall through and delete
+ }
+
+ if (d->m_cache.releaseItem(obj)) {
+ // Remove any bindings to avoid warnings due to parent change.
+ QObjectPrivate *p = QObjectPrivate::get(obj);
+ Q_ASSERT(p->declarativeData);
+ QDeclarativeData *d = static_cast<QDeclarativeData*>(p->declarativeData);
+ if (d->ownContext && d->context)
+ d->context->clearExpressions();
+
+ if (inPackage) {
+ emit destroyingPackage(qobject_cast<QDeclarativePackage*>(obj));
+ } else {
+ if (item->scene())
+ item->scene()->removeItem(item);
+ }
+ stat |= Destroyed;
+ obj->deleteLater();
+ } else if (!inPackage) {
+ stat |= Referenced;
+ }
+
+ return stat;
+}
+
+/*!
+ \qmlproperty object VisualDataModel::parts
+
+ The \a parts property selects a VisualDataModel which creates
+ delegates from the part named. This is used in conjunction with
+ the Package element.
+
+ For example, the code below selects a model which creates
+ delegates named \e list from a Package:
+
+ \code
+ VisualDataModel {
+ id: visualModel
+ delegate: Package {
+ Item { Package.name: "list" }
+ }
+ model: myModel
+ }
+
+ ListView {
+ width: 200; height:200
+ model: visualModel.parts.list
+ }
+ \endcode
+
+ \sa Package
+*/
+QObject *QDeclarativeVisualDataModel::parts()
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (!d->m_parts)
+ d->m_parts = new QDeclarativeVisualDataModelParts(this);
+ return d->m_parts;
+}
+
+QDeclarativeItem *QDeclarativeVisualDataModel::item(int index, const QByteArray &viewId, bool complete)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (d->m_visualItemModel)
+ return d->m_visualItemModel->item(index, viewId, complete);
+
+ if (d->modelCount() <= 0 || !d->m_delegate)
+ return 0;
+ QObject *nobj = d->m_cache.getItem(index);
+ bool needComplete = false;
+ if (!nobj) {
+ QDeclarativeContext *ccontext = d->m_context;
+ if (!ccontext) ccontext = qmlContext(this);
+ QDeclarativeContext *ctxt = new QDeclarativeContext(ccontext);
+ QDeclarativeVisualDataModelData *data = new QDeclarativeVisualDataModelData(index, this);
+ if ((!d->m_listModelInterface || !d->m_abstractItemModel) && d->m_listAccessor
+ && d->m_listAccessor->type() == QDeclarativeListAccessor::ListProperty) {
+ ctxt->setContextObject(d->m_listAccessor->at(index).value<QObject*>());
+ ctxt = new QDeclarativeContext(ctxt, ctxt);
+ }
+ ctxt->setContextProperty(QLatin1String("model"), data);
+ ctxt->setContextObject(data);
+ d->m_completePending = false;
+ nobj = d->m_delegate->beginCreate(ctxt);
+ if (complete) {
+ d->m_delegate->completeCreate();
+ } else {
+ d->m_completePending = true;
+ needComplete = true;
+ }
+ if (nobj) {
+ QDeclarative_setParent_noEvent(ctxt, nobj);
+ QDeclarative_setParent_noEvent(data, nobj);
+ d->m_cache.insertItem(index, nobj);
+ if (QDeclarativePackage *package = qobject_cast<QDeclarativePackage *>(nobj))
+ emit createdPackage(index, package);
+ } else {
+ delete data;
+ delete ctxt;
+ qmlInfo(this, d->m_delegate->errors()) << "Error creating delgate";
+ }
+ }
+ QDeclarativeItem *item = qobject_cast<QDeclarativeItem *>(nobj);
+ if (!item) {
+ QDeclarativePackage *package = qobject_cast<QDeclarativePackage *>(nobj);
+ if (package) {
+ QObject *o = package->part(QString::fromUtf8(viewId));
+ item = qobject_cast<QDeclarativeItem *>(o);
+ if (item)
+ d->m_packaged.insertMulti(item, package);
+ }
+ }
+ if (!item) {
+ if (needComplete)
+ d->m_delegate->completeCreate();
+ d->m_cache.releaseItem(nobj);
+ if (!d->m_delegateValidated) {
+ qmlInfo(d->m_delegate) << QDeclarativeVisualDataModel::tr("Delegate component must be Item type.");
+ d->m_delegateValidated = true;
+ }
+ }
+
+ return item;
+}
+
+bool QDeclarativeVisualDataModel::completePending() const
+{
+ Q_D(const QDeclarativeVisualDataModel);
+ if (d->m_visualItemModel)
+ return d->m_visualItemModel->completePending();
+ return d->m_completePending;
+}
+
+void QDeclarativeVisualDataModel::completeItem()
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (d->m_visualItemModel) {
+ d->m_visualItemModel->completeItem();
+ return;
+ }
+
+ d->m_delegate->completeCreate();
+ d->m_completePending = false;
+}
+
+QString QDeclarativeVisualDataModel::stringValue(int index, const QString &name)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (d->m_visualItemModel)
+ return d->m_visualItemModel->stringValue(index, name);
+
+ if ((!d->m_listModelInterface && !d->m_abstractItemModel) || !d->m_delegate)
+ return QString();
+
+ QString val;
+ QObject *data = 0;
+ bool tempData = false;
+
+ if (QObject *nobj = d->m_cache.item(index))
+ data = d->data(nobj);
+ if (!data) {
+ data = new QDeclarativeVisualDataModelData(index, this);
+ tempData = true;
+ }
+
+ QDeclarativeData *ddata = QDeclarativeData::get(data);
+ if (ddata && ddata->propertyCache) {
+ QDeclarativePropertyCache::Data *prop = ddata->propertyCache->property(name);
+ if (prop) {
+ if (prop->propType == QVariant::String) {
+ void *args[] = { &val, 0 };
+ QMetaObject::metacall(data, QMetaObject::ReadProperty, prop->coreIndex, args);
+ } else if (prop->propType == qMetaTypeId<QVariant>()) {
+ QVariant v;
+ void *args[] = { &v, 0 };
+ QMetaObject::metacall(data, QMetaObject::ReadProperty, prop->coreIndex, args);
+ val = v.toString();
+ }
+ } else {
+ val = data->property(name.toUtf8()).toString();
+ }
+ } else {
+ val = data->property(name.toUtf8()).toString();
+ }
+
+ if (tempData)
+ delete data;
+
+ return val;
+}
+
+QVariant QDeclarativeVisualDataModel::evaluate(int index, const QString &expression, QObject *objectContext)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (d->m_visualItemModel)
+ return d->m_visualItemModel->evaluate(index, expression, objectContext);
+
+ if ((!d->m_listModelInterface && !d->m_abstractItemModel) || !d->m_delegate)
+ return QVariant();
+
+ QVariant value;
+ QObject *nobj = d->m_cache.item(index);
+ if (nobj) {
+ QDeclarativeItem *item = qobject_cast<QDeclarativeItem *>(nobj);
+ if (item) {
+ QDeclarativeExpression e(qmlContext(item), objectContext, expression);
+ value = e.evaluate();
+ }
+ } else {
+ QDeclarativeContext *ccontext = d->m_context;
+ if (!ccontext) ccontext = qmlContext(this);
+ QDeclarativeContext *ctxt = new QDeclarativeContext(ccontext);
+ QDeclarativeVisualDataModelData *data = new QDeclarativeVisualDataModelData(index, this);
+ ctxt->setContextObject(data);
+ QDeclarativeExpression e(ctxt, objectContext, expression);
+ value = e.evaluate();
+ delete data;
+ delete ctxt;
+ }
+
+ return value;
+}
+
+int QDeclarativeVisualDataModel::indexOf(QDeclarativeItem *item, QObject *) const
+{
+ QVariant val = QDeclarativeEngine::contextForObject(item)->contextProperty(QLatin1String("index"));
+ return val.toInt();
+ return -1;
+}
+
+void QDeclarativeVisualDataModel::_q_itemsChanged(int index, int count,
+ const QList<int> &roles)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ for (QHash<int,QDeclarativeVisualDataModelPrivate::ObjectRef>::ConstIterator iter = d->m_cache.begin();
+ iter != d->m_cache.end(); ++iter) {
+ const int idx = iter.key();
+
+ if (idx >= index && idx < index+count) {
+ QDeclarativeVisualDataModelPrivate::ObjectRef objRef = *iter;
+ QDeclarativeVisualDataModelData *data = d->data(objRef.obj);
+ for (int roleIdx = 0; roleIdx < roles.count(); ++roleIdx) {
+ int role = roles.at(roleIdx);
+ int propId = data->propForRole(role);
+ if (propId != -1) {
+ if (d->m_listModelInterface) {
+ data->setValue(propId, d->m_listModelInterface->data(idx, QList<int>() << role).value(role));
+ } else if (d->m_abstractItemModel) {
+ QModelIndex index = d->m_abstractItemModel->index(idx, 0, d->m_root);
+ data->setValue(propId, d->m_abstractItemModel->data(index, role));
+ }
+ } else {
+ QString roleName;
+ if (d->m_listModelInterface)
+ roleName = d->m_listModelInterface->toString(role);
+ else if (d->m_abstractItemModel)
+ roleName = QString::fromUtf8(d->m_abstractItemModel->roleNames().value(role));
+ qmlInfo(this) << "Changing role not present in item: " << roleName;
+ }
+ }
+ }
+ }
+}
+
+void QDeclarativeVisualDataModel::_q_itemsInserted(int index, int count)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (!count)
+ return;
+ // XXX - highly inefficient
+ QHash<int,QDeclarativeVisualDataModelPrivate::ObjectRef> items;
+ for (QHash<int,QDeclarativeVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin();
+ iter != d->m_cache.end(); ) {
+
+ if (iter.key() >= index) {
+ QDeclarativeVisualDataModelPrivate::ObjectRef objRef = *iter;
+ int index = iter.key() + count;
+ iter = d->m_cache.erase(iter);
+
+ items.insert(index, objRef);
+
+ QDeclarativeVisualDataModelData *data = d->data(objRef.obj);
+ data->setIndex(index);
+ } else {
+ ++iter;
+ }
+ }
+ d->m_cache.unite(items);
+
+ emit itemsInserted(index, count);
+ emit countChanged();
+}
+
+void QDeclarativeVisualDataModel::_q_itemsRemoved(int index, int count)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (!count)
+ return;
+ // XXX - highly inefficient
+ QHash<int, QDeclarativeVisualDataModelPrivate::ObjectRef> items;
+ for (QHash<int, QDeclarativeVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin();
+ iter != d->m_cache.end(); ) {
+ if (iter.key() >= index && iter.key() < index + count) {
+ QDeclarativeVisualDataModelPrivate::ObjectRef objRef = *iter;
+ iter = d->m_cache.erase(iter);
+ items.insertMulti(-1, objRef); //XXX perhaps better to maintain separately
+ QDeclarativeVisualDataModelData *data = d->data(objRef.obj);
+ data->setIndex(-1);
+ } else if (iter.key() >= index + count) {
+ QDeclarativeVisualDataModelPrivate::ObjectRef objRef = *iter;
+ int index = iter.key() - count;
+ iter = d->m_cache.erase(iter);
+ items.insert(index, objRef);
+ QDeclarativeVisualDataModelData *data = d->data(objRef.obj);
+ data->setIndex(index);
+ } else {
+ ++iter;
+ }
+ }
+
+ d->m_cache.unite(items);
+ emit itemsRemoved(index, count);
+ emit countChanged();
+}
+
+void QDeclarativeVisualDataModel::_q_itemsMoved(int from, int to, int count)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ // XXX - highly inefficient
+ QHash<int,QDeclarativeVisualDataModelPrivate::ObjectRef> items;
+ for (QHash<int,QDeclarativeVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin();
+ iter != d->m_cache.end(); ) {
+
+ if (iter.key() >= from && iter.key() < from + count) {
+ QDeclarativeVisualDataModelPrivate::ObjectRef objRef = *iter;
+ int index = iter.key() - from + to;
+ iter = d->m_cache.erase(iter);
+
+ items.insert(index, objRef);
+
+ QDeclarativeVisualDataModelData *data = d->data(objRef.obj);
+ data->setIndex(index);
+ } else {
+ ++iter;
+ }
+ }
+ for (QHash<int,QDeclarativeVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin();
+ iter != d->m_cache.end(); ) {
+
+ int diff = from > to ? count : -count;
+ if (iter.key() >= qMin(from,to) && iter.key() < qMax(from+count,to+count)) {
+ QDeclarativeVisualDataModelPrivate::ObjectRef objRef = *iter;
+ int index = iter.key() + diff;
+ iter = d->m_cache.erase(iter);
+
+ items.insert(index, objRef);
+
+ QDeclarativeVisualDataModelData *data = d->data(objRef.obj);
+ data->setIndex(index);
+ } else {
+ ++iter;
+ }
+ }
+ d->m_cache.unite(items);
+
+ emit itemsMoved(from, to, count);
+}
+
+void QDeclarativeVisualDataModel::_q_rowsInserted(const QModelIndex &parent, int begin, int end)
+{
+ if (!parent.isValid())
+ _q_itemsInserted(begin, end - begin + 1);
+}
+
+void QDeclarativeVisualDataModel::_q_rowsRemoved(const QModelIndex &parent, int begin, int end)
+{
+ if (!parent.isValid())
+ _q_itemsRemoved(begin, end - begin + 1);
+}
+
+void QDeclarativeVisualDataModel::_q_rowsMoved(const QModelIndex &sourceParent, int sourceStart, int sourceEnd, const QModelIndex &destinationParent, int destinationRow)
+{
+ const int count = sourceEnd - sourceStart + 1;
+ if (!destinationParent.isValid() && !sourceParent.isValid()) {
+ _q_itemsMoved(sourceStart, destinationRow, count);
+ } else if (!sourceParent.isValid()) {
+ _q_itemsRemoved(sourceStart, count);
+ } else if (!destinationParent.isValid()) {
+ _q_itemsInserted(destinationRow, count);
+ }
+}
+
+void QDeclarativeVisualDataModel::_q_dataChanged(const QModelIndex &begin, const QModelIndex &end)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ if (!begin.parent().isValid())
+ _q_itemsChanged(begin.row(), end.row() - begin.row() + 1, d->m_roles);
+}
+
+void QDeclarativeVisualDataModel::_q_modelReset()
+{
+ emit modelReset();
+}
+
+void QDeclarativeVisualDataModel::_q_createdPackage(int index, QDeclarativePackage *package)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ emit createdItem(index, qobject_cast<QDeclarativeItem*>(package->part(d->m_part)));
+}
+
+void QDeclarativeVisualDataModel::_q_destroyingPackage(QDeclarativePackage *package)
+{
+ Q_D(QDeclarativeVisualDataModel);
+ emit destroyingItem(qobject_cast<QDeclarativeItem*>(package->part(d->m_part)));
+}
+
+QT_END_NAMESPACE
+
+QML_DECLARE_TYPE(QListModelInterface)
+
+#include <qdeclarativevisualitemmodel.moc>