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Diffstat (limited to 'src/declarative/items/qsgvisualitemmodel.cpp')
| -rw-r--r-- | src/declarative/items/qsgvisualitemmodel.cpp | 1254 |
1 files changed, 1254 insertions, 0 deletions
diff --git a/src/declarative/items/qsgvisualitemmodel.cpp b/src/declarative/items/qsgvisualitemmodel.cpp new file mode 100644 index 0000000000..daf67b573a --- /dev/null +++ b/src/declarative/items/qsgvisualitemmodel.cpp @@ -0,0 +1,1254 @@ +// Commit: dcb9148091cbf6872b60407c301d7c92427583a6 +/**************************************************************************** +** +** Copyright (C) 2011 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 "qsgvisualitemmodel_p.h" +#include "qsgitem.h" + +#include <QtDeclarative/qdeclarativecontext.h> +#include <QtDeclarative/qdeclarativeengine.h> +#include <QtDeclarative/qdeclarativeexpression.h> +#include <QtDeclarative/qdeclarativeinfo.h> + +#include <private/qdeclarativecontext_p.h> +#include <private/qdeclarativepackage_p.h> +#include <private/qdeclarativeopenmetaobject_p.h> +#include <private/qdeclarativelistaccessor_p.h> +#include <private/qdeclarativedata_p.h> +#include <private/qdeclarativepropertycache_p.h> +#include <private/qdeclarativeguard_p.h> +#include <private/qdeclarativeglobal_p.h> +#include <private/qlistmodelinterface_p.h> +#include <private/qmetaobjectbuilder_p.h> +#include <private/qobject_p.h> + +#include <QtCore/qhash.h> +#include <QtCore/qlist.h> + +QT_BEGIN_NAMESPACE + +QHash<QObject*, QSGVisualItemModelAttached*> QSGVisualItemModelAttached::attachedProperties; + + +class QSGVisualItemModelPrivate : public QObjectPrivate +{ + Q_DECLARE_PUBLIC(QSGVisualItemModel) +public: + QSGVisualItemModelPrivate() : QObjectPrivate() {} + + static void children_append(QDeclarativeListProperty<QSGItem> *prop, QSGItem *item) { + QDeclarative_setParent_noEvent(item, prop->object); + static_cast<QSGVisualItemModelPrivate *>(prop->data)->children.append(Item(item)); + static_cast<QSGVisualItemModelPrivate *>(prop->data)->itemAppended(); + static_cast<QSGVisualItemModelPrivate *>(prop->data)->emitChildrenChanged(); + } + + static int children_count(QDeclarativeListProperty<QSGItem> *prop) { + return static_cast<QSGVisualItemModelPrivate *>(prop->data)->children.count(); + } + + static QSGItem *children_at(QDeclarativeListProperty<QSGItem> *prop, int index) { + return static_cast<QSGVisualItemModelPrivate *>(prop->data)->children.at(index).item; + } + + void itemAppended() { + Q_Q(QSGVisualItemModel); + QSGVisualItemModelAttached *attached = QSGVisualItemModelAttached::properties(children.last().item); + attached->setIndex(children.count()-1); + emit q->itemsInserted(children.count()-1, 1); + emit q->countChanged(); + } + + void emitChildrenChanged() { + Q_Q(QSGVisualItemModel); + emit q->childrenChanged(); + } + + int indexOf(QSGItem *item) const { + for (int i = 0; i < children.count(); ++i) + if (children.at(i).item == item) + return i; + return -1; + } + + class Item { + public: + Item(QSGItem *i) : item(i), ref(0) {} + + void addRef() { ++ref; } + bool deref() { return --ref == 0; } + + QSGItem *item; + int ref; + }; + + QList<Item> children; +}; + +QSGVisualItemModel::QSGVisualItemModel(QObject *parent) + : QSGVisualModel(*(new QSGVisualItemModelPrivate), parent) +{ +} + +QDeclarativeListProperty<QSGItem> QSGVisualItemModel::children() +{ + Q_D(QSGVisualItemModel); + return QDeclarativeListProperty<QSGItem>(this, d, d->children_append, + d->children_count, d->children_at); +} + +int QSGVisualItemModel::count() const +{ + Q_D(const QSGVisualItemModel); + return d->children.count(); +} + +bool QSGVisualItemModel::isValid() const +{ + return true; +} + +QSGItem *QSGVisualItemModel::item(int index, bool) +{ + Q_D(QSGVisualItemModel); + QSGVisualItemModelPrivate::Item &item = d->children[index]; + item.addRef(); + return item.item; +} + +QSGVisualModel::ReleaseFlags QSGVisualItemModel::release(QSGItem *item) +{ + Q_D(QSGVisualItemModel); + int idx = d->indexOf(item); + if (idx >= 0) { + if (d->children[idx].deref()) { + // XXX todo - the original did item->scene()->removeItem(). Why? + item->setParentItem(0); + QDeclarative_setParent_noEvent(item, this); + } + } + return 0; +} + +bool QSGVisualItemModel::completePending() const +{ + return false; +} + +void QSGVisualItemModel::completeItem() +{ + // Nothing to do +} + +QString QSGVisualItemModel::stringValue(int index, const QString &name) +{ + Q_D(QSGVisualItemModel); + if (index < 0 || index >= d->children.count()) + return QString(); + return QDeclarativeEngine::contextForObject(d->children.at(index).item)->contextProperty(name).toString(); +} + +int QSGVisualItemModel::indexOf(QSGItem *item, QObject *) const +{ + Q_D(const QSGVisualItemModel); + return d->indexOf(item); +} + +QSGVisualItemModelAttached *QSGVisualItemModel::qmlAttachedProperties(QObject *obj) +{ + return QSGVisualItemModelAttached::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 QSGVisualDataModelParts; +class QSGVisualDataModelData; +class QSGVisualDataModelPrivate : public QObjectPrivate +{ +public: + QSGVisualDataModelPrivate(QDeclarativeContext *); + + static QSGVisualDataModelPrivate *get(QSGVisualDataModel *m) { + return static_cast<QSGVisualDataModelPrivate *>(QObjectPrivate::get(m)); + } + + QDeclarativeGuard<QListModelInterface> m_listModelInterface; + QDeclarativeGuard<QAbstractItemModel> m_abstractItemModel; + QDeclarativeGuard<QSGVisualDataModel> 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)); + } 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()) + m_roleNames.insert("hasModelChildren", -1); + } 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> m_roleToPropId; + int m_modelDataPropId; + 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(); + m_roleToPropId.insert(*it, propId); + ++it; + } + // Add modelData property + if (m_roles.count() == 1) + m_modelDataPropId = m_delegateDataType->createProperty("modelData") - m_delegateDataType->propertyOffset(); + 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; + + QSGVisualDataModelParts *m_parts; + friend class QSGVisualItemParts; + + VDMDelegateDataType *m_delegateDataType; + friend class QSGVisualDataModelData; + bool m_metaDataCreated : 1; + bool m_metaDataCacheable : 1; + bool m_delegateValidated : 1; + bool m_completePending : 1; + + QSGVisualDataModelData *data(QObject *item); + + QVariant m_modelVariant; + QDeclarativeListAccessor *m_listAccessor; + + QModelIndex m_root; + QList<QByteArray> watchedRoles; + QList<int> watchedRoleIds; +}; + +class QSGVisualDataModelDataMetaObject : public QDeclarativeOpenMetaObject +{ +public: + QSGVisualDataModelDataMetaObject(QObject *parent, QDeclarativeOpenMetaObjectType *type) + : QDeclarativeOpenMetaObject(parent, type) {} + + virtual QVariant initialValue(int); + virtual int createProperty(const char *, const char *); + +private: + friend class QSGVisualDataModelData; +}; + +class QSGVisualDataModelData : public QObject +{ +Q_OBJECT +public: + QSGVisualDataModelData(int index, QSGVisualDataModel *model); + ~QSGVisualDataModelData(); + + Q_PROPERTY(int index READ index NOTIFY indexChanged) + int index() const; + void setIndex(int index); + + int propForRole(int) const; + int modelDataPropertyId() const { + QSGVisualDataModelPrivate *model = QSGVisualDataModelPrivate::get(m_model); + return model->m_modelDataPropId; + } + + void setValue(int, const QVariant &); + bool hasValue(int id) const { + return m_meta->hasValue(id); + } + + void ensureProperties(); + +Q_SIGNALS: + void indexChanged(); + +private: + friend class QSGVisualDataModelDataMetaObject; + int m_index; + QDeclarativeGuard<QSGVisualDataModel> m_model; + QSGVisualDataModelDataMetaObject *m_meta; +}; + +int QSGVisualDataModelData::propForRole(int id) const +{ + QSGVisualDataModelPrivate *model = QSGVisualDataModelPrivate::get(m_model); + QHash<int,int>::const_iterator it = model->m_roleToPropId.find(id); + if (it != model->m_roleToPropId.end()) + return *it; + + return -1; +} + +void QSGVisualDataModelData::setValue(int id, const QVariant &val) +{ + m_meta->setValue(id, val); +} + +int QSGVisualDataModelDataMetaObject::createProperty(const char *name, const char *type) +{ + QSGVisualDataModelData *data = + static_cast<QSGVisualDataModelData *>(object()); + + if (!data->m_model) + return -1; + + QSGVisualDataModelPrivate *model = QSGVisualDataModelPrivate::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 QSGVisualDataModelDataMetaObject::initialValue(int propId) +{ + QSGVisualDataModelData *data = + static_cast<QSGVisualDataModelData *>(object()); + + Q_ASSERT(data->m_model); + QSGVisualDataModelPrivate *model = QSGVisualDataModelPrivate::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 compatibility 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(); + QModelIndex index = model->m_abstractItemModel->index(data->m_index, 0, model->m_root); + if (propName == "hasModelChildren") { + return model->m_abstractItemModel->hasChildren(index); + } else { + QHash<QByteArray,int>::const_iterator it = model->m_roleNames.find(propName); + if (it != model->m_roleNames.end()) { + return model->m_abstractItemModel->data(index, *it); + } else if (model->m_roles.count() == 1 && propName == "modelData") { + //for compatibility with other lists, assign modelData if there is only a single role + return model->m_abstractItemModel->data(index, model->m_roles.first()); + } + } + } + Q_ASSERT(!"Can never be reached"); + return QVariant(); +} + +QSGVisualDataModelData::QSGVisualDataModelData(int index, + QSGVisualDataModel *model) +: m_index(index), m_model(model), +m_meta(new QSGVisualDataModelDataMetaObject(this, QSGVisualDataModelPrivate::get(model)->m_delegateDataType)) +{ + ensureProperties(); +} + +QSGVisualDataModelData::~QSGVisualDataModelData() +{ +} + +void QSGVisualDataModelData::ensureProperties() +{ + QSGVisualDataModelPrivate *modelPriv = QSGVisualDataModelPrivate::get(m_model); + if (modelPriv->m_metaDataCacheable) { + if (!modelPriv->m_metaDataCreated) + modelPriv->createMetaData(); + if (modelPriv->m_metaDataCreated) + m_meta->setCached(true); + } +} + +int QSGVisualDataModelData::index() const +{ + return m_index; +} + +// This is internal only - it should not be set from qml +void QSGVisualDataModelData::setIndex(int index) +{ + m_index = index; + emit indexChanged(); +} + +//--------------------------------------------------------------------------- + +class QSGVisualDataModelPartsMetaObject : public QDeclarativeOpenMetaObject +{ +public: + QSGVisualDataModelPartsMetaObject(QObject *parent) + : QDeclarativeOpenMetaObject(parent) {} + + virtual void propertyCreated(int, QMetaPropertyBuilder &); + virtual QVariant initialValue(int); +}; + +class QSGVisualDataModelParts : public QObject +{ +Q_OBJECT +public: + QSGVisualDataModelParts(QSGVisualDataModel *parent); + +private: + friend class QSGVisualDataModelPartsMetaObject; + QSGVisualDataModel *model; +}; + +void QSGVisualDataModelPartsMetaObject::propertyCreated(int, QMetaPropertyBuilder &prop) +{ + prop.setWritable(false); +} + +QVariant QSGVisualDataModelPartsMetaObject::initialValue(int id) +{ + QSGVisualDataModel *m = new QSGVisualDataModel; + m->setParent(object()); + m->setPart(QString::fromUtf8(name(id))); + m->setModel(QVariant::fromValue(static_cast<QSGVisualDataModelParts *>(object())->model)); + + QVariant var = QVariant::fromValue((QObject *)m); + return var; +} + +QSGVisualDataModelParts::QSGVisualDataModelParts(QSGVisualDataModel *parent) +: QObject(parent), model(parent) +{ + new QSGVisualDataModelPartsMetaObject(this); +} + +QSGVisualDataModelPrivate::QSGVisualDataModelPrivate(QDeclarativeContext *ctxt) +: m_listModelInterface(0), m_abstractItemModel(0), m_visualItemModel(0), m_delegate(0) +, m_context(ctxt), m_modelDataPropId(-1), m_parts(0), m_delegateDataType(0), m_metaDataCreated(false) +, m_metaDataCacheable(false), m_delegateValidated(false), m_completePending(false), m_listAccessor(0) +{ +} + +QSGVisualDataModelData *QSGVisualDataModelPrivate::data(QObject *item) +{ + QSGVisualDataModelData *dataItem = + item->findChild<QSGVisualDataModelData *>(); + Q_ASSERT(dataItem); + return dataItem; +} + +//--------------------------------------------------------------------------- + +QSGVisualDataModel::QSGVisualDataModel() +: QSGVisualModel(*(new QSGVisualDataModelPrivate(0))) +{ +} + +QSGVisualDataModel::QSGVisualDataModel(QDeclarativeContext *ctxt, QObject *parent) +: QSGVisualModel(*(new QSGVisualDataModelPrivate(ctxt)), parent) +{ +} + +QSGVisualDataModel::~QSGVisualDataModel() +{ + Q_D(QSGVisualDataModel); + if (d->m_listAccessor) + delete d->m_listAccessor; + if (d->m_delegateDataType) + d->m_delegateDataType->release(); +} + +QVariant QSGVisualDataModel::model() const +{ + Q_D(const QSGVisualDataModel); + return d->m_modelVariant; +} + +void QSGVisualDataModel::setModel(const QVariant &model) +{ + Q_D(QSGVisualDataModel); + 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(QModelIndex,int,int)), + this, SLOT(_q_rowsInserted(QModelIndex,int,int))); + QObject::disconnect(d->m_abstractItemModel, SIGNAL(rowsRemoved(QModelIndex,int,int)), + this, SLOT(_q_rowsRemoved(QModelIndex,int,int))); + QObject::disconnect(d->m_abstractItemModel, SIGNAL(dataChanged(QModelIndex,QModelIndex)), + this, SLOT(_q_dataChanged(QModelIndex,QModelIndex))); + QObject::disconnect(d->m_abstractItemModel, SIGNAL(rowsMoved(QModelIndex,int,int,QModelIndex,int)), + this, SLOT(_q_rowsMoved(QModelIndex,int,int,QModelIndex,int))); + QObject::disconnect(d->m_abstractItemModel, SIGNAL(modelReset()), this, SLOT(_q_modelReset())); + QObject::disconnect(d->m_abstractItemModel, SIGNAL(layoutChanged()), this, SLOT(_q_layoutChanged())); + d->m_abstractItemModel = 0; + } 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(&QSGVisualDataModelData::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(QModelIndex,int,int)), + this, SLOT(_q_rowsInserted(QModelIndex,int,int))); + QObject::connect(d->m_abstractItemModel, SIGNAL(rowsRemoved(QModelIndex,int,int)), + this, SLOT(_q_rowsRemoved(QModelIndex,int,int))); + QObject::connect(d->m_abstractItemModel, SIGNAL(dataChanged(QModelIndex,QModelIndex)), + this, SLOT(_q_dataChanged(QModelIndex,QModelIndex))); + QObject::connect(d->m_abstractItemModel, SIGNAL(rowsMoved(QModelIndex,int,int,QModelIndex,int)), + this, SLOT(_q_rowsMoved(QModelIndex,int,int,QModelIndex,int))); + QObject::connect(d->m_abstractItemModel, SIGNAL(modelReset()), this, SLOT(_q_modelReset())); + QObject::connect(d->m_abstractItemModel, SIGNAL(layoutChanged()), this, SLOT(_q_layoutChanged())); + d->m_metaDataCacheable = true; + if (d->m_abstractItemModel->canFetchMore(d->m_root)) + d->m_abstractItemModel->fetchMore(d->m_root); + return; + } + if ((d->m_visualItemModel = qvariant_cast<QSGVisualDataModel *>(model))) { + QObject::connect(d->m_visualItemModel, SIGNAL(countChanged()), + this, SIGNAL(countChanged())); + 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(); + } +} + +QDeclarativeComponent *QSGVisualDataModel::delegate() const +{ + Q_D(const QSGVisualDataModel); + if (d->m_visualItemModel) + return d->m_visualItemModel->delegate(); + return d->m_delegate; +} + +void QSGVisualDataModel::setDelegate(QDeclarativeComponent *delegate) +{ + Q_D(QSGVisualDataModel); + 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(); + } +} + +QVariant QSGVisualDataModel::rootIndex() const +{ + Q_D(const QSGVisualDataModel); + return QVariant::fromValue(d->m_root); +} + +void QSGVisualDataModel::setRootIndex(const QVariant &root) +{ + Q_D(QSGVisualDataModel); + QModelIndex modelIndex = qvariant_cast<QModelIndex>(root); + if (d->m_root != modelIndex) { + int oldCount = d->modelCount(); + d->m_root = modelIndex; + if (d->m_abstractItemModel && d->m_abstractItemModel->canFetchMore(modelIndex)) + d->m_abstractItemModel->fetchMore(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(); + } +} + +QVariant QSGVisualDataModel::modelIndex(int idx) const +{ + Q_D(const QSGVisualDataModel); + if (d->m_abstractItemModel) + return QVariant::fromValue(d->m_abstractItemModel->index(idx, 0, d->m_root)); + return QVariant::fromValue(QModelIndex()); +} + +QVariant QSGVisualDataModel::parentModelIndex() const +{ + Q_D(const QSGVisualDataModel); + if (d->m_abstractItemModel) + return QVariant::fromValue(d->m_abstractItemModel->parent(d->m_root)); + return QVariant::fromValue(QModelIndex()); +} + +QString QSGVisualDataModel::part() const +{ + Q_D(const QSGVisualDataModel); + return d->m_part; +} + +void QSGVisualDataModel::setPart(const QString &part) +{ + Q_D(QSGVisualDataModel); + d->m_part = part; +} + +int QSGVisualDataModel::count() const +{ + Q_D(const QSGVisualDataModel); + if (d->m_visualItemModel) + return d->m_visualItemModel->count(); + if (!d->m_delegate) + return 0; + return d->modelCount(); +} + +QSGItem *QSGVisualDataModel::item(int index, bool complete) +{ + Q_D(QSGVisualDataModel); + if (d->m_visualItemModel) + return d->m_visualItemModel->item(index, d->m_part.toUtf8(), complete); + return item(index, QByteArray(), complete); +} + +/* + Returns ReleaseStatus flags. +*/ +QSGVisualDataModel::ReleaseFlags QSGVisualDataModel::release(QSGItem *item) +{ + Q_D(QSGVisualDataModel); + 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->clearContext(); + + if (inPackage) { + emit destroyingPackage(qobject_cast<QDeclarativePackage*>(obj)); + } else { + // XXX todo - the original did item->scene()->removeItem(). Why? + item->setParentItem(0); + } + stat |= Destroyed; + obj->deleteLater(); + } else if (!inPackage) { + stat |= Referenced; + } + + return stat; +} + +QObject *QSGVisualDataModel::parts() +{ + Q_D(QSGVisualDataModel); + if (!d->m_parts) + d->m_parts = new QSGVisualDataModelParts(this); + return d->m_parts; +} + +QSGItem *QSGVisualDataModel::item(int index, const QByteArray &viewId, bool complete) +{ + Q_D(QSGVisualDataModel); + 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); + QSGVisualDataModelData *data = new QSGVisualDataModelData(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 delegate"; + } + } + QSGItem *item = qobject_cast<QSGItem *>(nobj); + if (!item) { + QDeclarativePackage *package = qobject_cast<QDeclarativePackage *>(nobj); + if (package) { + QObject *o = package->part(QString::fromUtf8(viewId)); + item = qobject_cast<QSGItem *>(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) << QSGVisualDataModel::tr("Delegate component must be Item type."); + d->m_delegateValidated = true; + } + } + if (d->modelCount()-1 == index && d->m_abstractItemModel && d->m_abstractItemModel->canFetchMore(d->m_root)) + d->m_abstractItemModel->fetchMore(d->m_root); + + return item; +} + +bool QSGVisualDataModel::completePending() const +{ + Q_D(const QSGVisualDataModel); + if (d->m_visualItemModel) + return d->m_visualItemModel->completePending(); + return d->m_completePending; +} + +void QSGVisualDataModel::completeItem() +{ + Q_D(QSGVisualDataModel); + if (d->m_visualItemModel) { + d->m_visualItemModel->completeItem(); + return; + } + + d->m_delegate->completeCreate(); + d->m_completePending = false; +} + +QString QSGVisualDataModel::stringValue(int index, const QString &name) +{ + Q_D(QSGVisualDataModel); + if (d->m_visualItemModel) + return d->m_visualItemModel->stringValue(index, name); + + if ((!d->m_listModelInterface || !d->m_abstractItemModel) && d->m_listAccessor) { + if (QObject *object = d->m_listAccessor->at(index).value<QObject*>()) + return object->property(name.toUtf8()).toString(); + } + + 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 QSGVisualDataModelData(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; +} + +int QSGVisualDataModel::indexOf(QSGItem *item, QObject *) const +{ + QVariant val = QDeclarativeEngine::contextForObject(item)->contextProperty(QLatin1String("index")); + return val.toInt(); + return -1; +} + +void QSGVisualDataModel::setWatchedRoles(QList<QByteArray> roles) +{ + Q_D(QSGVisualDataModel); + d->watchedRoles = roles; + d->watchedRoleIds.clear(); +} + +void QSGVisualDataModel::_q_itemsChanged(int index, int count, + const QList<int> &roles) +{ + Q_D(QSGVisualDataModel); + bool changed = false; + if (!d->watchedRoles.isEmpty() && d->watchedRoleIds.isEmpty()) { + foreach (QByteArray r, d->watchedRoles) { + if (d->m_roleNames.contains(r)) + d->watchedRoleIds << d->m_roleNames.value(r); + } + } + + for (QHash<int,QSGVisualDataModelPrivate::ObjectRef>::ConstIterator iter = d->m_cache.begin(); + iter != d->m_cache.end(); ++iter) { + const int idx = iter.key(); + + if (idx >= index && idx < index+count) { + QSGVisualDataModelPrivate::ObjectRef objRef = *iter; + QSGVisualDataModelData *data = d->data(objRef.obj); + for (int roleIdx = 0; roleIdx < roles.count(); ++roleIdx) { + int role = roles.at(roleIdx); + if (!changed && !d->watchedRoleIds.isEmpty() && d->watchedRoleIds.contains(role)) + changed = true; + int propId = data->propForRole(role); + if (propId != -1) { + if (data->hasValue(propId)) { + if (d->m_listModelInterface) { + data->setValue(propId, d->m_listModelInterface->data(idx, 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; + } + } + if (d->m_roles.count() == 1) { + // Handle the modelData role we add if there is just one role. + int propId = data->modelDataPropertyId(); + if (data->hasValue(propId)) { + int role = d->m_roles.at(0); + if (d->m_listModelInterface) { + data->setValue(propId, d->m_listModelInterface->data(idx, 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)); + } + } + } + } + } + if (changed) + emit itemsChanged(index, count); +} + +void QSGVisualDataModel::_q_itemsInserted(int index, int count) +{ + Q_D(QSGVisualDataModel); + if (!count) + return; + // XXX - highly inefficient + QHash<int,QSGVisualDataModelPrivate::ObjectRef> items; + for (QHash<int,QSGVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin(); + iter != d->m_cache.end(); ) { + + if (iter.key() >= index) { + QSGVisualDataModelPrivate::ObjectRef objRef = *iter; + int index = iter.key() + count; + iter = d->m_cache.erase(iter); + + items.insert(index, objRef); + + QSGVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(index); + } else { + ++iter; + } + } + d->m_cache.unite(items); + + emit itemsInserted(index, count); + emit countChanged(); +} + +void QSGVisualDataModel::_q_itemsRemoved(int index, int count) +{ + Q_D(QSGVisualDataModel); + if (!count) + return; + // XXX - highly inefficient + QHash<int, QSGVisualDataModelPrivate::ObjectRef> items; + for (QHash<int, QSGVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin(); + iter != d->m_cache.end(); ) { + if (iter.key() >= index && iter.key() < index + count) { + QSGVisualDataModelPrivate::ObjectRef objRef = *iter; + iter = d->m_cache.erase(iter); + items.insertMulti(-1, objRef); //XXX perhaps better to maintain separately + QSGVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(-1); + } else if (iter.key() >= index + count) { + QSGVisualDataModelPrivate::ObjectRef objRef = *iter; + int index = iter.key() - count; + iter = d->m_cache.erase(iter); + items.insert(index, objRef); + QSGVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(index); + } else { + ++iter; + } + } + + d->m_cache.unite(items); + emit itemsRemoved(index, count); + emit countChanged(); +} + +void QSGVisualDataModel::_q_itemsMoved(int from, int to, int count) +{ + Q_D(QSGVisualDataModel); + // XXX - highly inefficient + QHash<int,QSGVisualDataModelPrivate::ObjectRef> items; + for (QHash<int,QSGVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin(); + iter != d->m_cache.end(); ) { + + if (iter.key() >= from && iter.key() < from + count) { + QSGVisualDataModelPrivate::ObjectRef objRef = *iter; + int index = iter.key() - from + to; + iter = d->m_cache.erase(iter); + + items.insert(index, objRef); + + QSGVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(index); + } else { + ++iter; + } + } + for (QHash<int,QSGVisualDataModelPrivate::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)) { + QSGVisualDataModelPrivate::ObjectRef objRef = *iter; + int index = iter.key() + diff; + iter = d->m_cache.erase(iter); + + items.insert(index, objRef); + + QSGVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(index); + } else { + ++iter; + } + } + d->m_cache.unite(items); + + emit itemsMoved(from, to, count); +} + +void QSGVisualDataModel::_q_rowsInserted(const QModelIndex &parent, int begin, int end) +{ + Q_D(QSGVisualDataModel); + if (parent == d->m_root) + _q_itemsInserted(begin, end - begin + 1); +} + +void QSGVisualDataModel::_q_rowsRemoved(const QModelIndex &parent, int begin, int end) +{ + Q_D(QSGVisualDataModel); + if (parent == d->m_root) + _q_itemsRemoved(begin, end - begin + 1); +} + +void QSGVisualDataModel::_q_rowsMoved(const QModelIndex &sourceParent, int sourceStart, int sourceEnd, const QModelIndex &destinationParent, int destinationRow) +{ + Q_D(QSGVisualDataModel); + const int count = sourceEnd - sourceStart + 1; + if (destinationParent == d->m_root && sourceParent == d->m_root) { + _q_itemsMoved(sourceStart, sourceStart > destinationRow ? destinationRow : destinationRow-1, count); + } else if (sourceParent == d->m_root) { + _q_itemsRemoved(sourceStart, count); + } else if (destinationParent == d->m_root) { + _q_itemsInserted(destinationRow, count); + } +} + +void QSGVisualDataModel::_q_dataChanged(const QModelIndex &begin, const QModelIndex &end) +{ + Q_D(QSGVisualDataModel); + if (begin.parent() == d->m_root) + _q_itemsChanged(begin.row(), end.row() - begin.row() + 1, d->m_roles); +} + +void QSGVisualDataModel::_q_layoutChanged() +{ + Q_D(QSGVisualDataModel); + _q_itemsChanged(0, count(), d->m_roles); +} + +void QSGVisualDataModel::_q_modelReset() +{ + Q_D(QSGVisualDataModel); + d->m_root = QModelIndex(); + emit modelReset(); + emit rootIndexChanged(); + if (d->m_abstractItemModel && d->m_abstractItemModel->canFetchMore(d->m_root)) + d->m_abstractItemModel->fetchMore(d->m_root); +} + +void QSGVisualDataModel::_q_createdPackage(int index, QDeclarativePackage *package) +{ + Q_D(QSGVisualDataModel); + emit createdItem(index, qobject_cast<QSGItem*>(package->part(d->m_part))); +} + +void QSGVisualDataModel::_q_destroyingPackage(QDeclarativePackage *package) +{ + Q_D(QSGVisualDataModel); + emit destroyingItem(qobject_cast<QSGItem*>(package->part(d->m_part))); +} + +QT_END_NAMESPACE + +QML_DECLARE_TYPE(QListModelInterface) + +#include <qsgvisualitemmodel.moc> |