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Diffstat (limited to 'src/declarative/graphicsitems/qmlgraphicsvisualitemmodel.cpp')
| -rw-r--r-- | src/declarative/graphicsitems/qmlgraphicsvisualitemmodel.cpp | 1155 |
1 files changed, 1155 insertions, 0 deletions
diff --git a/src/declarative/graphicsitems/qmlgraphicsvisualitemmodel.cpp b/src/declarative/graphicsitems/qmlgraphicsvisualitemmodel.cpp new file mode 100644 index 0000000..2fc143d --- /dev/null +++ b/src/declarative/graphicsitems/qmlgraphicsvisualitemmodel.cpp @@ -0,0 +1,1155 @@ +/**************************************************************************** +** +** 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 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 "qmlgraphicsvisualitemmodel_p.h" + +#include "qmlgraphicsitem.h" + +#include <qmlcontext.h> +#include <qmlengine.h> +#include <qmlexpression.h> +#include <qmlpackage_p.h> +#include <qmlopenmetaobject_p.h> +#include <qmllistaccessor_p.h> +#include <qmlinfo.h> +#include <qmldeclarativedata_p.h> +#include <qmlpropertycache_p.h> +#include <qmlguard_p.h> + +#include <qlistmodelinterface_p.h> +#include <qhash.h> +#include <qlist.h> +#include <qmetaobjectbuilder_p.h> +#include <QtCore/qdebug.h> + +#include <private/qobject_p.h> + +QML_DECLARE_TYPE(QListModelInterface) + +QT_BEGIN_NAMESPACE + +class QmlGraphicsVisualItemModelAttached : public QObject +{ + Q_OBJECT + +public: + QmlGraphicsVisualItemModelAttached(QObject *parent) + : QObject(parent), m_index(0) {} + ~QmlGraphicsVisualItemModelAttached() { + attachedProperties.remove(parent()); + } + + Q_PROPERTY(int index READ index NOTIFY indexChanged) + int index() const { return m_index; } + void setIndex(int idx) { + if (m_index != idx) { + m_index = idx; + emit indexChanged(); + } + } + + static QmlGraphicsVisualItemModelAttached *properties(QObject *obj) { + QmlGraphicsVisualItemModelAttached *rv = attachedProperties.value(obj); + if (!rv) { + rv = new QmlGraphicsVisualItemModelAttached(obj); + attachedProperties.insert(obj, rv); + } + return rv; + } + +Q_SIGNALS: + void indexChanged(); + +public: + int m_index; + + static QHash<QObject*, QmlGraphicsVisualItemModelAttached*> attachedProperties; +}; + +QHash<QObject*, QmlGraphicsVisualItemModelAttached*> QmlGraphicsVisualItemModelAttached::attachedProperties; + + +class QmlGraphicsVisualItemModelPrivate : public QObjectPrivate +{ + Q_DECLARE_PUBLIC(QmlGraphicsVisualItemModel) +public: + QmlGraphicsVisualItemModelPrivate() : QObjectPrivate(), children(this) {} + + struct ItemList : public QmlConcreteList<QmlGraphicsItem *> + { + ItemList(QmlGraphicsVisualItemModelPrivate *m) : QmlConcreteList<QmlGraphicsItem *>(), model(m) {} + + void append(QmlGraphicsItem *item); + + QmlGraphicsVisualItemModelPrivate *model; + }; + + void itemAppended() { + Q_Q(QmlGraphicsVisualItemModel); + QmlGraphicsVisualItemModelAttached *attached = QmlGraphicsVisualItemModelAttached::properties(children.last()); + attached->setIndex(children.count()-1); + emit q->itemsInserted(children.count()-1, 1); + emit q->countChanged(); + } + + void emitChildrenChanged() { + Q_Q(QmlGraphicsVisualItemModel); + emit q->childrenChanged(); + } + ItemList children; +}; + + +/*! + \qmlclass VisualItemModel QmlGraphicsVisualItemModel + \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 +*/ +QmlGraphicsVisualItemModel::QmlGraphicsVisualItemModel() + : QmlGraphicsVisualModel(*(new QmlGraphicsVisualItemModelPrivate)) +{ +} + +QmlList<QmlGraphicsItem *> *QmlGraphicsVisualItemModel::children() +{ + Q_D(QmlGraphicsVisualItemModel); + return &(d->children); +} + +/*! + \qmlproperty int VisualItemModel::count + + The number of items in the model. This property is readonly. +*/ +int QmlGraphicsVisualItemModel::count() const +{ + Q_D(const QmlGraphicsVisualItemModel); + return d->children.count(); +} + +bool QmlGraphicsVisualItemModel::isValid() const +{ + return true; +} + +QmlGraphicsItem *QmlGraphicsVisualItemModel::item(int index, bool) +{ + Q_D(QmlGraphicsVisualItemModel); + return d->children.at(index); +} + +QmlGraphicsVisualModel::ReleaseFlags QmlGraphicsVisualItemModel::release(QmlGraphicsItem *) +{ + // Nothing to do + return 0; +} + +void QmlGraphicsVisualItemModel::completeItem() +{ + // Nothing to do +} + +QString QmlGraphicsVisualItemModel::stringValue(int index, const QString &name) +{ + Q_D(QmlGraphicsVisualItemModel); + if (index < 0 || index >= d->children.count()) + return QString(); + return QmlEngine::contextForObject(d->children.at(index))->contextProperty(name).toString(); +} + +QVariant QmlGraphicsVisualItemModel::evaluate(int index, const QString &expression, QObject *objectContext) +{ + Q_D(QmlGraphicsVisualItemModel); + if (index < 0 || index >= d->children.count()) + return QVariant(); + QmlContext *ccontext = qmlContext(this); + QmlContext *ctxt = new QmlContext(ccontext); + ctxt->addDefaultObject(d->children.at(index)); + QmlExpression e(ctxt, expression, objectContext); + e.setTrackChange(false); + QVariant value = e.value(); + delete ctxt; + return value; +} + +int QmlGraphicsVisualItemModel::indexOf(QmlGraphicsItem *item, QObject *) const +{ + Q_D(const QmlGraphicsVisualItemModel); + return d->children.indexOf(item); +} + +void QmlGraphicsVisualItemModelPrivate::ItemList::append(QmlGraphicsItem *item) +{ + QmlConcreteList<QmlGraphicsItem*>::append(item); + item->QObject::setParent(model->q_ptr); + model->itemAppended(); + + model->emitChildrenChanged(); +} + +QmlGraphicsVisualItemModelAttached *QmlGraphicsVisualItemModel::qmlAttachedProperties(QObject *obj) +{ + return QmlGraphicsVisualItemModelAttached::properties(obj); +} + +//============================================================================ + +class VDMDelegateDataType : public QmlOpenMetaObjectType +{ +public: + VDMDelegateDataType(const QMetaObject *base, QmlEngine *engine) : QmlOpenMetaObjectType(base, engine) {} + + void propertyCreated(int, QMetaPropertyBuilder &prop) { + prop.setWritable(false); + } +}; + +class QmlGraphicsVisualDataModelParts; +class QmlGraphicsVisualDataModelData; +class QmlGraphicsVisualDataModelPrivate : public QObjectPrivate +{ +public: + QmlGraphicsVisualDataModelPrivate(QmlContext *); + + static QmlGraphicsVisualDataModelPrivate *get(QmlGraphicsVisualDataModel *m) { + return static_cast<QmlGraphicsVisualDataModelPrivate *>(QObjectPrivate::get(m)); + } + + QmlGuard<QListModelInterface> m_listModelInterface; + QmlGuard<QAbstractItemModel> m_abstractItemModel; + QmlGuard<QmlGraphicsVisualDataModel> m_visualItemModel; + QString m_part; + + QmlComponent *m_delegate; + QmlContext *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)); + } else if (m_listAccessor) { + m_roleNames.insert("modelData", 0); + if (m_listAccessor->type() == QmlListAccessor::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); + } + } + } + } + } + } + + void createMetaData() { + if (!m_metaDataCreated) { + ensureRoles(); + QHash<QByteArray, int>::const_iterator it = m_roleNames.begin(); + while (it != m_roleNames.end()) { + m_delegateDataType->createProperty(it.key()); + ++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(); + if (m_listAccessor) + return m_listAccessor->count(); + return 0; + } + + Cache m_cache; + QHash<QObject *, QmlPackage*> m_packaged; + + QmlGraphicsVisualDataModelParts *m_parts; + friend class QmlGraphicsVisualItemParts; + + VDMDelegateDataType *m_delegateDataType; + friend class QmlGraphicsVisualDataModelData; + bool m_metaDataCreated; + bool m_metaDataCacheable; + + QmlGraphicsVisualDataModelData *data(QObject *item); + + QVariant m_modelVariant; + QmlListAccessor *m_listAccessor; +}; + +class QmlGraphicsVisualDataModelDataMetaObject : public QmlOpenMetaObject +{ +public: + QmlGraphicsVisualDataModelDataMetaObject(QObject *parent, QmlOpenMetaObjectType *type) + : QmlOpenMetaObject(parent, type) {} + + virtual QVariant initialValue(int); + virtual int createProperty(const char *, const char *); + +private: + friend class QmlGraphicsVisualDataModelData; + QHash<int,int> roleToProp; +}; + +class QmlGraphicsVisualDataModelData : public QObject +{ +Q_OBJECT +public: + QmlGraphicsVisualDataModelData(int index, QmlGraphicsVisualDataModel *model); + ~QmlGraphicsVisualDataModelData(); + + Q_PROPERTY(int index READ index NOTIFY indexChanged) + int index() const; + void setIndex(int index); + + int propForRole(int) const; + void setValue(int, const QVariant &); + +Q_SIGNALS: + void indexChanged(); + +private: + friend class QmlGraphicsVisualDataModelDataMetaObject; + int m_index; + QmlGuard<QmlGraphicsVisualDataModel> m_model; + QmlGraphicsVisualDataModelDataMetaObject *m_meta; +}; + +int QmlGraphicsVisualDataModelData::propForRole(int id) const +{ + QHash<int,int>::const_iterator it = m_meta->roleToProp.find(id); + if (it != m_meta->roleToProp.end()) + return m_meta->roleToProp[id]; + return -1; +} + +void QmlGraphicsVisualDataModelData::setValue(int id, const QVariant &val) +{ + m_meta->setValue(id, val); +} + +int QmlGraphicsVisualDataModelDataMetaObject::createProperty(const char *name, const char *type) +{ + QmlGraphicsVisualDataModelData *data = + static_cast<QmlGraphicsVisualDataModelData *>(object()); + + if (!data->m_model) + return -1; + + QmlGraphicsVisualDataModelPrivate *model = QmlGraphicsVisualDataModelPrivate::get(data->m_model); + + if ((!model->m_listModelInterface || !model->m_abstractItemModel) && model->m_listAccessor) { + if (model->m_listAccessor->type() == QmlListAccessor::QmlList + || model->m_listAccessor->type() == QmlListAccessor::QListPtr) { + model->ensureRoles(); + QObject *object = model->m_listAccessor->at(data->m_index).value<QObject*>(); + if (object && object->property(name).isValid()) + return QmlOpenMetaObject::createProperty(name, type); + } + } + return -1; +} + +QVariant QmlGraphicsVisualDataModelDataMetaObject::initialValue(int propId) +{ + QmlGraphicsVisualDataModelData *data = + static_cast<QmlGraphicsVisualDataModelData *>(object()); + + Q_ASSERT(data->m_model); + QmlGraphicsVisualDataModelPrivate *model = QmlGraphicsVisualDataModelPrivate::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() == QmlListAccessor::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()) { + roleToProp.insert(*it, propId); + 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 + roleToProp.insert(model->m_roles.first(), propId); + QVariant value = model->m_listModelInterface->data(data->m_index, model->m_roles.first()); + return value; + } + } else if (model->m_abstractItemModel) { + model->ensureRoles(); + QHash<QByteArray,int>::const_iterator it = model->m_roleNames.find(propName); + if (it != model->m_roleNames.end()) { + roleToProp.insert(*it, propId); + QModelIndex index = model->m_abstractItemModel->index(data->m_index, 0); + return model->m_abstractItemModel->data(index, *it); + } + } + Q_ASSERT(!"Can never be reached"); + return QVariant(); +} + +QmlGraphicsVisualDataModelData::QmlGraphicsVisualDataModelData(int index, + QmlGraphicsVisualDataModel *model) +: m_index(index), m_model(model), +m_meta(new QmlGraphicsVisualDataModelDataMetaObject(this, QmlGraphicsVisualDataModelPrivate::get(model)->m_delegateDataType)) +{ + QmlGraphicsVisualDataModelPrivate *modelPriv = QmlGraphicsVisualDataModelPrivate::get(model); + if (modelPriv->m_metaDataCacheable) { + if (!modelPriv->m_metaDataCreated) + modelPriv->createMetaData(); + m_meta->setCached(true); + } +} + +QmlGraphicsVisualDataModelData::~QmlGraphicsVisualDataModelData() +{ +} + +int QmlGraphicsVisualDataModelData::index() const +{ + return m_index; +} + +// This is internal only - it should not be set from qml +void QmlGraphicsVisualDataModelData::setIndex(int index) +{ + m_index = index; + emit indexChanged(); +} + +//--------------------------------------------------------------------------- + +class QmlGraphicsVisualDataModelPartsMetaObject : public QmlOpenMetaObject +{ +public: + QmlGraphicsVisualDataModelPartsMetaObject(QObject *parent) + : QmlOpenMetaObject(parent) {} + + virtual void propertyCreated(int, QMetaPropertyBuilder &); + virtual QVariant initialValue(int); +}; + +class QmlGraphicsVisualDataModelParts : public QObject +{ +Q_OBJECT +public: + QmlGraphicsVisualDataModelParts(QmlGraphicsVisualDataModel *parent); + +private: + friend class QmlGraphicsVisualDataModelPartsMetaObject; + QmlGraphicsVisualDataModel *model; +}; + +void QmlGraphicsVisualDataModelPartsMetaObject::propertyCreated(int, QMetaPropertyBuilder &prop) +{ + prop.setWritable(false); +} + +QVariant QmlGraphicsVisualDataModelPartsMetaObject::initialValue(int id) +{ + QmlGraphicsVisualDataModel *m = new QmlGraphicsVisualDataModel; + m->setParent(object()); + m->setPart(QString::fromUtf8(name(id))); + m->setModel(QVariant::fromValue(static_cast<QmlGraphicsVisualDataModelParts *>(object())->model)); + + QVariant var = QVariant::fromValue((QObject *)m); + return var; +} + +QmlGraphicsVisualDataModelParts::QmlGraphicsVisualDataModelParts(QmlGraphicsVisualDataModel *parent) +: QObject(parent), model(parent) +{ + new QmlGraphicsVisualDataModelPartsMetaObject(this); +} + +QmlGraphicsVisualDataModelPrivate::QmlGraphicsVisualDataModelPrivate(QmlContext *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_listAccessor(0) +{ +} + +QmlGraphicsVisualDataModelData *QmlGraphicsVisualDataModelPrivate::data(QObject *item) +{ + QmlGraphicsVisualDataModelData *dataItem = + item->findChild<QmlGraphicsVisualDataModelData *>(); + Q_ASSERT(dataItem); + return dataItem; +} + +//--------------------------------------------------------------------------- + +QmlGraphicsVisualDataModel::QmlGraphicsVisualDataModel() +: QmlGraphicsVisualModel(*(new QmlGraphicsVisualDataModelPrivate(0))) +{ +} + +QmlGraphicsVisualDataModel::QmlGraphicsVisualDataModel(QmlContext *ctxt) +: QmlGraphicsVisualModel(*(new QmlGraphicsVisualDataModelPrivate(ctxt))) +{ +} + +QmlGraphicsVisualDataModel::~QmlGraphicsVisualDataModel() +{ + Q_D(QmlGraphicsVisualDataModel); + if (d->m_listAccessor) + delete d->m_listAccessor; + if (d->m_delegateDataType) + d->m_delegateDataType->release(); +} + +QVariant QmlGraphicsVisualDataModel::model() const +{ + Q_D(const QmlGraphicsVisualDataModel); + return d->m_modelVariant; +} + +void QmlGraphicsVisualDataModel::setModel(const QVariant &model) +{ + Q_D(QmlGraphicsVisualDataModel); + 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))); + } 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,QmlPackage*)), + this, SLOT(_q_createdPackage(int,QmlPackage*))); + QObject::disconnect(d->m_visualItemModel, SIGNAL(destroyingPackage(QmlPackage*)), + this, SLOT(_q_destroyingPackage(QmlPackage*))); + 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(&QmlGraphicsVisualDataModelData::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))); + d->m_metaDataCacheable = true; + return; + } + if ((d->m_visualItemModel = qvariant_cast<QmlGraphicsVisualDataModel *>(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,QmlPackage*)), + this, SLOT(_q_createdPackage(int,QmlPackage*))); + QObject::connect(d->m_visualItemModel, SIGNAL(destroyingPackage(QmlPackage*)), + this, SLOT(_q_destroyingPackage(QmlPackage*))); + return; + } + d->m_listAccessor = new QmlListAccessor; + d->m_listAccessor->setList(model, d->m_context?d->m_context->engine():qmlEngine(this)); + if (d->m_listAccessor->type() != QmlListAccessor::QmlList && d->m_listAccessor->type() != QmlListAccessor::QListPtr) + d->m_metaDataCacheable = true; + if (d->m_delegate && d->modelCount()) { + emit itemsInserted(0, d->modelCount()); + emit countChanged(); + } +} + +QmlComponent *QmlGraphicsVisualDataModel::delegate() const +{ + Q_D(const QmlGraphicsVisualDataModel); + if (d->m_visualItemModel) + return d->m_visualItemModel->delegate(); + return d->m_delegate; +} + +void QmlGraphicsVisualDataModel::setDelegate(QmlComponent *delegate) +{ + Q_D(QmlGraphicsVisualDataModel); + bool wasValid = d->m_delegate != 0; + d->m_delegate = delegate; + 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(); + } +} + +QString QmlGraphicsVisualDataModel::part() const +{ + Q_D(const QmlGraphicsVisualDataModel); + return d->m_part; +} + +void QmlGraphicsVisualDataModel::setPart(const QString &part) +{ + Q_D(QmlGraphicsVisualDataModel); + d->m_part = part; +} + +int QmlGraphicsVisualDataModel::count() const +{ + Q_D(const QmlGraphicsVisualDataModel); + return d->modelCount(); +} + +QmlGraphicsItem *QmlGraphicsVisualDataModel::item(int index, bool complete) +{ + Q_D(QmlGraphicsVisualDataModel); + if (d->m_visualItemModel) + return d->m_visualItemModel->item(index, d->m_part.toUtf8(), complete); + return item(index, QByteArray(), complete); +} + +/* + Returns ReleaseStatus flags. +*/ +QmlGraphicsVisualDataModel::ReleaseFlags QmlGraphicsVisualDataModel::release(QmlGraphicsItem *item) +{ + Q_D(QmlGraphicsVisualDataModel); + if (d->m_visualItemModel) + return d->m_visualItemModel->release(item); + + ReleaseFlags stat = 0; + QObject *obj = item; + bool inPackage = false; + + QHash<QObject*,QmlPackage*>::iterator it = d->m_packaged.find(item); + if (it != d->m_packaged.end()) { + QmlPackage *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)) { + if (inPackage) { + emit destroyingPackage(qobject_cast<QmlPackage*>(obj)); + } else { + item->setVisible(false); + static_cast<QGraphicsItem*>(item)->setParentItem(0); + } + stat |= Destroyed; + obj->deleteLater(); + } else if (!inPackage) { + stat |= Referenced; + } + + return stat; +} + +QObject *QmlGraphicsVisualDataModel::parts() +{ + Q_D(QmlGraphicsVisualDataModel); + if (!d->m_parts) + d->m_parts = new QmlGraphicsVisualDataModelParts(this); + return d->m_parts; +} + +QmlGraphicsItem *QmlGraphicsVisualDataModel::item(int index, const QByteArray &viewId, bool complete) +{ + Q_D(QmlGraphicsVisualDataModel); + 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); + if (!nobj) { + QmlContext *ccontext = d->m_context; + if (!ccontext) ccontext = qmlContext(this); + QmlContext *ctxt = new QmlContext(ccontext); + QmlGraphicsVisualDataModelData *data = new QmlGraphicsVisualDataModelData(index, this); + ctxt->setContextProperty(QLatin1String("model"), data); + ctxt->addDefaultObject(data); + nobj = d->m_delegate->beginCreate(ctxt); + if (complete) + d->m_delegate->completeCreate(); + if (nobj) { + ctxt->setParent(nobj); + data->setParent(nobj); + d->m_cache.insertItem(index, nobj); + if (QmlPackage *package = qobject_cast<QmlPackage *>(nobj)) + emit createdPackage(index, package); + } else { + delete data; + delete ctxt; + qWarning() << d->m_delegate->errors(); + } + } + QmlGraphicsItem *item = qobject_cast<QmlGraphicsItem *>(nobj); + if (!item) { + QmlPackage *package = qobject_cast<QmlPackage *>(nobj); + if (package) { + QObject *o = package->part(QString::fromUtf8(viewId)); + item = qobject_cast<QmlGraphicsItem *>(o); + if (item) + d->m_packaged.insertMulti(item, package); + } + } + if (!item) { + d->m_cache.releaseItem(nobj); + qmlInfo(d->m_delegate) << QmlGraphicsVisualDataModel::tr("Delegate component must be Item type."); + } + + return item; +} + +void QmlGraphicsVisualDataModel::completeItem() +{ + Q_D(QmlGraphicsVisualDataModel); + if (d->m_visualItemModel) { + d->m_visualItemModel->completeItem(); + return; + } + + d->m_delegate->completeCreate(); +} + +QString QmlGraphicsVisualDataModel::stringValue(int index, const QString &name) +{ + Q_D(QmlGraphicsVisualDataModel); + 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 QmlGraphicsVisualDataModelData(index, this); + tempData = true; + } + + QmlDeclarativeData *ddata = QmlDeclarativeData::get(data); + if (ddata && ddata->propertyCache) { + QmlPropertyCache::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 QmlGraphicsVisualDataModel::evaluate(int index, const QString &expression, QObject *objectContext) +{ + Q_D(QmlGraphicsVisualDataModel); + 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) { + QmlGraphicsItem *item = qobject_cast<QmlGraphicsItem *>(nobj); + if (item) { + QmlExpression e(qmlContext(item), expression, objectContext); + e.setTrackChange(false); + value = e.value(); + } + } else { + QmlContext *ccontext = d->m_context; + if (!ccontext) ccontext = qmlContext(this); + QmlContext *ctxt = new QmlContext(ccontext); + QmlGraphicsVisualDataModelData *data = new QmlGraphicsVisualDataModelData(index, this); + ctxt->addDefaultObject(data); + QmlExpression e(ctxt, expression, objectContext); + e.setTrackChange(false); + value = e.value(); + delete data; + delete ctxt; + } + + return value; +} + +int QmlGraphicsVisualDataModel::indexOf(QmlGraphicsItem *item, QObject *) const +{ + QVariant val = QmlEngine::contextForObject(item)->contextProperty(QLatin1String("index")); + return val.toInt(); + return -1; +} + +void QmlGraphicsVisualDataModel::_q_itemsChanged(int index, int count, + const QList<int> &roles) +{ + Q_D(QmlGraphicsVisualDataModel); + // XXX - highly inefficient + for (int ii = index; ii < index + count; ++ii) { + + if (QObject *item = d->m_cache.item(ii)) { + QmlGraphicsVisualDataModelData *data = d->data(item); + + 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(ii, QList<int>() << role).value(role)); + } else if (d->m_abstractItemModel) { + QModelIndex index = d->m_abstractItemModel->index(ii, 0); + data->setValue(propId, d->m_abstractItemModel->data(index, role)); + } + } + } + } + } +} + +void QmlGraphicsVisualDataModel::_q_itemsInserted(int index, int count) +{ + Q_D(QmlGraphicsVisualDataModel); + // XXX - highly inefficient + QHash<int,QmlGraphicsVisualDataModelPrivate::ObjectRef> items; + for (QHash<int,QmlGraphicsVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin(); + iter != d->m_cache.end(); ) { + + if (iter.key() >= index) { + QmlGraphicsVisualDataModelPrivate::ObjectRef objRef = *iter; + int index = iter.key() + count; + iter = d->m_cache.erase(iter); + + items.insert(index, objRef); + + QmlGraphicsVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(index); + } else { + ++iter; + } + } + d->m_cache.unite(items); + + emit itemsInserted(index, count); + emit countChanged(); +} + +void QmlGraphicsVisualDataModel::_q_itemsRemoved(int index, int count) +{ + Q_D(QmlGraphicsVisualDataModel); + // XXX - highly inefficient + QHash<int, QmlGraphicsVisualDataModelPrivate::ObjectRef> items; + for (QHash<int, QmlGraphicsVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin(); + iter != d->m_cache.end(); ) { + if (iter.key() >= index && iter.key() < index + count) { + QmlGraphicsVisualDataModelPrivate::ObjectRef objRef = *iter; + iter = d->m_cache.erase(iter); + items.insertMulti(-1, objRef); //XXX perhaps better to maintain separately + QmlGraphicsVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(-1); + } else if (iter.key() >= index + count) { + QmlGraphicsVisualDataModelPrivate::ObjectRef objRef = *iter; + int index = iter.key() - count; + iter = d->m_cache.erase(iter); + items.insert(index, objRef); + QmlGraphicsVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(index); + } else { + ++iter; + } + } + + d->m_cache.unite(items); + emit itemsRemoved(index, count); + emit countChanged(); +} + +void QmlGraphicsVisualDataModel::_q_itemsMoved(int from, int to, int count) +{ + Q_D(QmlGraphicsVisualDataModel); + // XXX - highly inefficient + QHash<int,QmlGraphicsVisualDataModelPrivate::ObjectRef> items; + for (QHash<int,QmlGraphicsVisualDataModelPrivate::ObjectRef>::Iterator iter = d->m_cache.begin(); + iter != d->m_cache.end(); ) { + + if (iter.key() >= from && iter.key() < from + count) { + QmlGraphicsVisualDataModelPrivate::ObjectRef objRef = *iter; + int index = iter.key() - from + to; + iter = d->m_cache.erase(iter); + + items.insert(index, objRef); + + QmlGraphicsVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(index); + } else { + ++iter; + } + } + for (QHash<int,QmlGraphicsVisualDataModelPrivate::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)) { + QmlGraphicsVisualDataModelPrivate::ObjectRef objRef = *iter; + int index = iter.key() + diff; + iter = d->m_cache.erase(iter); + + items.insert(index, objRef); + + QmlGraphicsVisualDataModelData *data = d->data(objRef.obj); + data->setIndex(index); + } else { + ++iter; + } + } + d->m_cache.unite(items); + + emit itemsMoved(from, to, count); +} + +void QmlGraphicsVisualDataModel::_q_rowsInserted(const QModelIndex &parent, int begin, int end) +{ + if (!parent.isValid()) + _q_itemsInserted(begin, end - begin + 1); +} + +void QmlGraphicsVisualDataModel::_q_rowsRemoved(const QModelIndex &parent, int begin, int end) +{ + if (!parent.isValid()) + _q_itemsRemoved(begin, end - begin + 1); +} + +void QmlGraphicsVisualDataModel::_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 QmlGraphicsVisualDataModel::_q_dataChanged(const QModelIndex &begin, const QModelIndex &end) +{ + Q_D(QmlGraphicsVisualDataModel); + if (!begin.parent().isValid()) + _q_itemsChanged(begin.row(), end.row() - begin.row() + 1, d->m_roles); +} + +void QmlGraphicsVisualDataModel::_q_createdPackage(int index, QmlPackage *package) +{ + Q_D(QmlGraphicsVisualDataModel); + emit createdItem(index, qobject_cast<QmlGraphicsItem*>(package->part(d->m_part))); +} + +void QmlGraphicsVisualDataModel::_q_destroyingPackage(QmlPackage *package) +{ + Q_D(QmlGraphicsVisualDataModel); + emit destroyingItem(qobject_cast<QmlGraphicsItem*>(package->part(d->m_part))); +} + +QML_DEFINE_NOCREATE_TYPE(QmlGraphicsVisualModel); +QML_DEFINE_TYPE(Qt,4,6,VisualItemModel,QmlGraphicsVisualItemModel) +QML_DEFINE_TYPE(Qt,4,6,VisualDataModel,QmlGraphicsVisualDataModel) + +QT_END_NAMESPACE + +#include <qmlgraphicsvisualitemmodel.moc> |