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Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativevisualitemmodel.cpp')
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diff --git a/src/declarative/graphicsitems/qdeclarativevisualitemmodel.cpp b/src/declarative/graphicsitems/qdeclarativevisualitemmodel.cpp new file mode 100644 index 0000000..2402648 --- /dev/null +++ b/src/declarative/graphicsitems/qdeclarativevisualitemmodel.cpp @@ -0,0 +1,1291 @@ +/**************************************************************************** +** +** 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 "qdeclarativevisualitemmodel_p.h" + +#include "qdeclarativeitem.h" + +#include <qdeclarativecontext.h> +#include <qdeclarativeengine.h> +#include <qdeclarativeexpression.h> +#include <qdeclarativepackage_p.h> +#include <qdeclarativeopenmetaobject_p.h> +#include <qdeclarativelistaccessor_p.h> +#include <qdeclarativeinfo.h> +#include <qdeclarativedeclarativedata_p.h> +#include <qdeclarativepropertycache_p.h> +#include <qdeclarativeguard_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> + +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(); + } + + 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() + : QDeclarativeVisualModel(*(new QDeclarativeVisualItemModelPrivate)) +{ +} + +QDeclarativeListProperty<QDeclarativeItem> QDeclarativeVisualItemModel::children() +{ + Q_D(QDeclarativeVisualItemModel); + return QDeclarativeListProperty<QDeclarativeItem>(this, d, QDeclarativeVisualItemModelPrivate::children_append); +} + +/*! + \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; +} + +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->addDefaultObject(d->children.at(index)); + QDeclarativeExpression e(ctxt, expression, objectContext); + QVariant value = e.value(); + 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; + 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)); + } 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); + } + } + } + } + } + } + + 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(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; + bool m_metaDataCacheable; + + 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; + QHash<int,int> roleToProp; +}; + +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 &); + +Q_SIGNALS: + void indexChanged(); + +private: + friend class QDeclarativeVisualDataModelDataMetaObject; + int m_index; + QDeclarativeGuard<QDeclarativeVisualDataModel> m_model; + QDeclarativeVisualDataModelDataMetaObject *m_meta; +}; + +int QDeclarativeVisualDataModelData::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 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 ((!model->m_listModelInterface || !model->m_abstractItemModel) && model->m_listAccessor) { + if (model->m_listAccessor->type() == QDeclarativeListAccessor::ListProperty) { + model->ensureRoles(); + QObject *object = model->m_listAccessor->at(data->m_index).value<QObject*>(); + if (object && (object->property(name).isValid() || 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()) { + 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, 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)) +{ + QDeclarativeVisualDataModelPrivate *modelPriv = QDeclarativeVisualDataModelPrivate::get(model); + if (modelPriv->m_metaDataCacheable) { + if (!modelPriv->m_metaDataCreated) + modelPriv->createMetaData(); + m_meta->setCached(true); + } +} + +QDeclarativeVisualDataModelData::~QDeclarativeVisualDataModelData() +{ +} + +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_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) +: QDeclarativeVisualModel(*(new QDeclarativeVisualDataModelPrivate(ctxt))) +{ +} + +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}. + + Here is an example delegate: + \snippet doc/src/snippets/declarative/listview/listview.qml 0 +*/ +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; + 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. 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 + Q_DECLARE_METATYPE(QModelIndex) + + class MyModel : public QDirModel + { + Q_OBJECT + public: + MyModel(QDeclarativeContext *ctxt) : QDirModel(), context(ctxt) { + QHash<int,QByteArray> roles = roleNames(); + roles.insert(FilePathRole, "path"); + setRoleNames(roles); + context->setContextProperty("myModel", this); + context->setContextProperty("myRoot", QVariant::fromValue(index(0,0,QModelIndex()))); + } + + Q_INVOKABLE void setRoot(const QString &path) { + QModelIndex root = index(path); + context->setContextProperty("myRoot", QVariant::fromValue(root)); + } + + QDeclarativeContext *context; + }; + + int main(int argc, char ** argv) + { + QApplication app(argc, argv); + + QDeclarativeView view; + + MyModel model(view.rootContext()); + + view.setSource(QUrl("qrc:view.qml")); + view.show(); + + return app.exec(); + } + + #include "main.moc" + \endcode + + \code + // view.qml + import Qt 4.6 + + ListView { + width: 200 + height: 200 + model: VisualDataModel { + model: myModel + rootIndex: myRoot + delegate: Component { + Rectangle { + height: 25; width: 100 + Text { text: path } + MouseRegion { + anchors.fill: parent; + onClicked: myModel.setRoot(path) + } + } + } + } + } + \endcode + +*/ +QModelIndex QDeclarativeVisualDataModel::rootIndex() const +{ + Q_D(const QDeclarativeVisualDataModel); + return d->m_root; +} + +void QDeclarativeVisualDataModel::setRootIndex(const QModelIndex &root) +{ + Q_D(QDeclarativeVisualDataModel); + if (d->m_root != root) { + int oldCount = d->modelCount(); + d->m_root = root; + 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(); + } +} + +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)) { + if (inPackage) { + emit destroyingPackage(qobject_cast<QDeclarativePackage*>(obj)); + } else { + item->setVisible(false); + static_cast<QGraphicsItem*>(item)->setParentItem(0); + } + 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); + if (!nobj) { + QDeclarativeContext *ccontext = d->m_context; + if (!ccontext) ccontext = qmlContext(this); + QDeclarativeContext *ctxt = new QDeclarativeContext(ccontext); + QDeclarativeVisualDataModelData *data = new QDeclarativeVisualDataModelData(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 (QDeclarativePackage *package = qobject_cast<QDeclarativePackage *>(nobj)) + emit createdPackage(index, package); + } else { + delete data; + delete ctxt; + qWarning() << d->m_delegate->errors(); + } + } + 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) { + d->m_cache.releaseItem(nobj); + qmlInfo(d->m_delegate) << QDeclarativeVisualDataModel::tr("Delegate component must be Item type."); + } + + return item; +} + +void QDeclarativeVisualDataModel::completeItem() +{ + Q_D(QDeclarativeVisualDataModel); + if (d->m_visualItemModel) { + d->m_visualItemModel->completeItem(); + return; + } + + d->m_delegate->completeCreate(); +} + +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; + } + + QDeclarativeDeclarativeData *ddata = QDeclarativeDeclarativeData::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), expression, objectContext); + value = e.value(); + } + } else { + QDeclarativeContext *ccontext = d->m_context; + if (!ccontext) ccontext = qmlContext(this); + QDeclarativeContext *ctxt = new QDeclarativeContext(ccontext); + QDeclarativeVisualDataModelData *data = new QDeclarativeVisualDataModelData(index, this); + ctxt->addDefaultObject(data); + QDeclarativeExpression e(ctxt, expression, objectContext); + value = e.value(); + 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); + // XXX - highly inefficient + for (int ii = index; ii < index + count; ++ii) { + + if (QObject *item = d->m_cache.item(ii)) { + QDeclarativeVisualDataModelData *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, d->m_root); + data->setValue(propId, d->m_abstractItemModel->data(index, role)); + } + } + } + } + } +} + +void QDeclarativeVisualDataModel::_q_itemsInserted(int index, 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() >= 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); + // 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() +{ + Q_D(QDeclarativeVisualDataModel); + 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> |