diff options
Diffstat (limited to 'src/declarative/items/qsgvisualitemmodel.cpp')
| -rw-r--r-- | src/declarative/items/qsgvisualitemmodel.cpp | 1323 |
1 files changed, 1 insertions, 1322 deletions
diff --git a/src/declarative/items/qsgvisualitemmodel.cpp b/src/declarative/items/qsgvisualitemmodel.cpp index c6e5896373..fbc8a1abf2 100644 --- a/src/declarative/items/qsgvisualitemmodel.cpp +++ b/src/declarative/items/qsgvisualitemmodel.cpp @@ -42,22 +42,11 @@ #include "qsgvisualitemmodel_p.h" #include "qsgitem.h" +#include <QtCore/qcoreapplication.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/qdeclarativeproperty_p.h> #include <private/qobject_p.h> #include <QtCore/qhash.h> @@ -247,1315 +236,5 @@ QSGVisualItemModelAttached *QSGVisualItemModel::qmlAttachedProperties(QObject *o return QSGVisualItemModelAttached::properties(obj); } -//============================================================================ - -class VDMDelegateDataType : public QDeclarativeRefCount -{ -public: - VDMDelegateDataType() - : metaObject(0) - , propertyCache(0) - , propertyOffset(0) - , signalOffset(0) - , shared(true) - { - } - - VDMDelegateDataType(const VDMDelegateDataType &type) - : metaObject(0) - , propertyCache(0) - , propertyOffset(type.propertyOffset) - , signalOffset(type.signalOffset) - , shared(false) - , builder(type.metaObject, QMetaObjectBuilder::Properties - | QMetaObjectBuilder::Signals - | QMetaObjectBuilder::SuperClass - | QMetaObjectBuilder::ClassName) - { - builder.setFlags(QMetaObjectBuilder::DynamicMetaObject); - } - - ~VDMDelegateDataType() - { - if (propertyCache) - propertyCache->release(); - qFree(metaObject); - } - - QMetaObject *metaObject; - QDeclarativePropertyCache *propertyCache; - int propertyOffset; - int signalOffset; - bool shared : 1; - QMetaObjectBuilder builder; -}; - -class QSGVisualDataModelParts; -class QSGVisualDataModelData; -class QSGVisualDataModelDataMetaObject; -class QSGVisualDataModelPrivate : public QObjectPrivate -{ - Q_DECLARE_PUBLIC(QSGVisualDataModel) -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 addProperty(int role, int propertyId, const char *propertyName, const char *propertyType, bool isModelData = false); - template <typename T> void setModelDataType() - { - createModelData = &T::create; - m_delegateDataType->builder.setFlags(QMetaObjectBuilder::DynamicMetaObject); - m_delegateDataType->builder.setClassName(T::staticMetaObject.className()); - m_delegateDataType->builder.setSuperClass(&T::staticMetaObject); - m_delegateDataType->propertyOffset = T::staticMetaObject.propertyCount(); - m_delegateDataType->signalOffset = T::staticMetaObject.methodCount(); - } - QSGVisualDataModelData *createMetaObject(int index, QSGVisualDataModel *model); - - static QSGVisualDataModelData *initializeModelData(int index, QSGVisualDataModel *model) { - return get(model)->createMetaObject(index, model); - } - - typedef QSGVisualDataModelData *(*CreateModelData)(int index, QSGVisualDataModel *model); - - struct PropertyData { - int role; - bool isModelData : 1; - }; - - 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; - CreateModelData createModelData; - - friend class QSGVisualDataModelData; - bool m_delegateValidated : 1; - bool m_completePending : 1; - bool m_objectList : 1; - - QSGVisualDataModelData *data(QObject *item); - - QVariant m_modelVariant; - QDeclarativeListAccessor *m_listAccessor; - - QModelIndex m_root; - QList<QByteArray> watchedRoles; - QList<int> watchedRoleIds; - - QVector<PropertyData> m_propertyData; -}; - -class QSGVisualDataModelData : public QObject -{ - Q_OBJECT - Q_PROPERTY(int index READ index NOTIFY indexChanged) -public: - QSGVisualDataModelData(int index, QSGVisualDataModel *model); - ~QSGVisualDataModelData(); - - int index() const; - void setIndex(int index); - -Q_SIGNALS: - void indexChanged(); - -public: - int m_index; - QDeclarativeGuard<QSGVisualDataModel> m_model; -}; - -class QSGVisualDataModelDataMetaObject : public QAbstractDynamicMetaObject -{ -public: - QSGVisualDataModelDataMetaObject(QSGVisualDataModelData *data, VDMDelegateDataType *type) - : m_data(data) - , m_type(type) - { - QObjectPrivate *op = QObjectPrivate::get(m_data); - *static_cast<QMetaObject *>(this) = *type->metaObject; - op->metaObject = this; - m_type->addref(); - } - - ~QSGVisualDataModelDataMetaObject() { m_type->release(); } - - QSGVisualDataModelData *m_data; - VDMDelegateDataType *m_type; -}; - -class QSGVDMAbstractItemModelDataMetaObject : public QSGVisualDataModelDataMetaObject -{ -public: - QSGVDMAbstractItemModelDataMetaObject(QSGVisualDataModelData *object, VDMDelegateDataType *type) - : QSGVisualDataModelDataMetaObject(object, type) {} - - int metaCall(QMetaObject::Call call, int id, void **arguments) - { - if (call == QMetaObject::ReadProperty && id >= m_type->propertyOffset) { - QSGVisualDataModelPrivate *model = QSGVisualDataModelPrivate::get(m_data->m_model); - if (m_data->m_index == -1 || !model->m_abstractItemModel) - return -1; - *static_cast<QVariant *>(arguments[0]) = model->m_abstractItemModel->index( - m_data->m_index, 0, model->m_root).data(model->m_propertyData.at(id - m_type->propertyOffset).role); - return -1; - } else { - return m_data->qt_metacall(call, id, arguments); - } - } -}; - -class QSGVDMAbstractItemModelData : public QSGVisualDataModelData -{ - Q_OBJECT - Q_PROPERTY(bool hasModelChildren READ hasModelChildren CONSTANT) -public: - bool hasModelChildren() const - { - QSGVisualDataModelPrivate *model = QSGVisualDataModelPrivate::get(m_model); - return model->m_abstractItemModel->hasChildren(model->m_abstractItemModel->index(m_index, 0, model->m_root)); - } - - static QSGVisualDataModelData *create(int index, QSGVisualDataModel *model) { - return new QSGVDMAbstractItemModelData(index, model); } -private: - QSGVDMAbstractItemModelData(int index, QSGVisualDataModel *model) - : QSGVisualDataModelData(index, model) - { - new QSGVDMAbstractItemModelDataMetaObject( - this, QSGVisualDataModelPrivate::get(m_model)->m_delegateDataType); - } -}; - -class QSGVDMListModelInterfaceDataMetaObject : public QSGVisualDataModelDataMetaObject -{ -public: - QSGVDMListModelInterfaceDataMetaObject(QSGVisualDataModelData *object, VDMDelegateDataType *type) - : QSGVisualDataModelDataMetaObject(object, type) {} - - int metaCall(QMetaObject::Call call, int id, void **arguments) - { - if (call == QMetaObject::ReadProperty && id >= m_type->propertyOffset) { - QSGVisualDataModelPrivate *model = QSGVisualDataModelPrivate::get(m_data->m_model); - if (m_data->m_index == -1 || !model->m_listModelInterface) - return -1; - *static_cast<QVariant *>(arguments[0]) = model->m_listModelInterface->data( - m_data->m_index, model->m_propertyData.at(id - m_type->propertyOffset).role); - return -1; - } else { - return m_data->qt_metacall(call, id, arguments); - } - } -}; - -class QSGVDMListModelInterfaceData : public QSGVisualDataModelData -{ -public: - static QSGVisualDataModelData *create(int index, QSGVisualDataModel *model) { - return new QSGVDMListModelInterfaceData(index, model); } -private: - QSGVDMListModelInterfaceData(int index, QSGVisualDataModel *model) - : QSGVisualDataModelData(index, model) - { - new QSGVDMListModelInterfaceDataMetaObject( - this, QSGVisualDataModelPrivate::get(m_model)->m_delegateDataType); - } -}; - -class QSGVDMListAccessorData : public QSGVisualDataModelData -{ - Q_OBJECT - Q_PROPERTY(QVariant modelData READ modelData CONSTANT) -public: - QVariant modelData() const { - return QSGVisualDataModelPrivate::get(m_model)->m_listAccessor->at(m_index); } - - static QSGVisualDataModelData *create(int index, QSGVisualDataModel *model) { - return new QSGVDMListAccessorData(index, model); } -private: - QSGVDMListAccessorData(int index, QSGVisualDataModel *model) - : QSGVisualDataModelData(index, model) - { - } -}; - -class QSGVDMObjectDataMetaObject : public QSGVisualDataModelDataMetaObject -{ -public: - QSGVDMObjectDataMetaObject(QSGVisualDataModelData *data, VDMDelegateDataType *type) - : QSGVisualDataModelDataMetaObject(data, type) - , m_object(QSGVisualDataModelPrivate::get(data->m_model)->m_listAccessor->at(data->m_index).value<QObject *>()) - {} - - int metaCall(QMetaObject::Call call, int id, void **arguments) - { - if (id >= m_type->propertyOffset - && (call == QMetaObject::ReadProperty - || call == QMetaObject::WriteProperty - || call == QMetaObject::ResetProperty)) { - if (m_object) - QMetaObject::metacall(m_object, call, id - m_type->propertyOffset + 1, arguments); - return -1; - } else if (id >= m_type->signalOffset && call == QMetaObject::InvokeMetaMethod) { - QMetaObject::activate(m_data, this, id, 0); - return -1; - } else { - return m_data->qt_metacall(call, id, arguments); - } - } - - int createProperty(const char *name, const char *) - { - if (!m_object) - return -1; - const QMetaObject *metaObject = m_object->metaObject(); - - const int previousPropertyCount = propertyCount() - propertyOffset(); - int propertyIndex = metaObject->indexOfProperty(name); - if (propertyIndex == -1) - return -1; - if (previousPropertyCount + 1 == metaObject->propertyCount()) - return propertyIndex + m_type->propertyOffset - 1; - - if (m_type->shared) { - VDMDelegateDataType *type = m_type; - m_type = new VDMDelegateDataType(*m_type); - type->release(); - } - - const int previousMethodCount = methodCount(); - int notifierId = previousMethodCount; - for (int propertyId = previousPropertyCount; propertyId < metaObject->propertyCount() - 1; ++propertyId) { - QMetaProperty property = metaObject->property(propertyId + 1); - QMetaPropertyBuilder propertyBuilder; - if (property.hasNotifySignal()) { - m_type->builder.addSignal("__" + QByteArray::number(propertyId) + "()"); - propertyBuilder = m_type->builder.addProperty(property.name(), property.typeName(), notifierId); - ++notifierId; - } else { - propertyBuilder = m_type->builder.addProperty(property.name(), property.typeName()); - } - propertyBuilder.setWritable(property.isWritable()); - propertyBuilder.setResettable(property.isResettable()); - propertyBuilder.setConstant(property.isConstant()); - } - - if (m_type->metaObject) - qFree(m_type->metaObject); - m_type->metaObject = m_type->builder.toMetaObject(); - *static_cast<QMetaObject *>(this) = *m_type->metaObject; - - notifierId = previousMethodCount; - for (int i = previousPropertyCount; i < metaObject->propertyCount(); ++i) { - QMetaProperty property = metaObject->property(i); - if (property.hasNotifySignal()) { - QDeclarativePropertyPrivate::connect( - m_object, property.notifySignalIndex(), m_data, notifierId); - ++notifierId; - } - } - return propertyIndex + m_type->propertyOffset - 1; - } - - QDeclarativeGuard<QObject> m_object; -}; - -class QSGVDMObjectData : public QSGVisualDataModelData -{ - Q_OBJECT - Q_PROPERTY(QObject *modelData READ modelData CONSTANT) -public: - QObject *modelData() const { return m_metaObject->m_object; } - - static QSGVisualDataModelData *create(int index, QSGVisualDataModel *model) { - return new QSGVDMObjectData(index, model); } - -private: - QSGVDMObjectData(int index, QSGVisualDataModel *model) - : QSGVisualDataModelData(index, model) - , m_metaObject(new QSGVDMObjectDataMetaObject(this, QSGVisualDataModelPrivate::get(m_model)->m_delegateDataType)) - { - } - - QSGVDMObjectDataMetaObject *m_metaObject; -}; - -void QSGVisualDataModelPrivate::addProperty( - int role, int propertyId, const char *propertyName, const char *propertyType, bool isModelData) -{ - PropertyData propertyData; - propertyData.role = role; - propertyData.isModelData = isModelData; - m_delegateDataType->builder.addSignal("__" + QByteArray::number(propertyId) + "()"); - QMetaPropertyBuilder property = m_delegateDataType->builder.addProperty( - propertyName, propertyType, propertyId); - property.setWritable(false); - - m_propertyData.append(propertyData); -} - -QSGVisualDataModelData *QSGVisualDataModelPrivate::createMetaObject(int index, QSGVisualDataModel *model) -{ - Q_ASSERT(!m_delegateDataType); - - m_objectList = false; - m_propertyData.clear(); - if (m_listAccessor - && m_listAccessor->type() != QDeclarativeListAccessor::ListProperty - && m_listAccessor->type() != QDeclarativeListAccessor::Instance) { - createModelData = &QSGVDMListAccessorData::create; - return QSGVDMListAccessorData::create(index, model); - } - - m_delegateDataType = new VDMDelegateDataType; - if (m_listModelInterface) { - setModelDataType<QSGVDMListModelInterfaceData>(); - QList<int> roles = m_listModelInterface->roles(); - for (int propertyId = 0; propertyId < roles.count(); ++propertyId) { - const int role = roles.at(propertyId); - const QByteArray propertyName = m_listModelInterface->toString(role).toUtf8(); - addProperty(role, propertyId, propertyName, "QVariant"); - m_roleNames.insert(propertyName, role); - } - if (m_propertyData.count() == 1) - addProperty(roles.first(), 1, "modelData", "QVariant", true); - } else if (m_abstractItemModel) { - setModelDataType<QSGVDMAbstractItemModelData>(); - QHash<int, QByteArray> roleNames = m_abstractItemModel->roleNames(); - for (QHash<int, QByteArray>::const_iterator it = roleNames.begin(); it != roleNames.end(); ++it) { - addProperty(it.key(), m_propertyData.count(), it.value(), "QVariant"); - m_roleNames.insert(it.value(), it.key()); - } - if (m_propertyData.count() == 1) - addProperty(roleNames.begin().key(), 1, "modelData", "QVariant", true); - } else if (m_listAccessor) { - setModelDataType<QSGVDMObjectData>(); - m_objectList = true; - } else { - Q_ASSERT(!"No model set on VisualDataModel"); - return 0; - } - m_delegateDataType->metaObject = m_delegateDataType->builder.toMetaObject(); - if (!m_objectList) { - m_delegateDataType->propertyCache = new QDeclarativePropertyCache( - m_context ? m_context->engine() : qmlEngine(q_func()), m_delegateDataType->metaObject); - } - return createModelData(index, model); -} - -QSGVisualDataModelData::QSGVisualDataModelData(int index, QSGVisualDataModel *model) - : m_index(index) - , m_model(model) -{ -} - -QSGVisualDataModelData::~QSGVisualDataModelData() -{ -} - -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_parts(0), m_delegateDataType(0), createModelData(&initializeModelData) -, m_delegateValidated(false), m_completePending(false), m_objectList(false), m_listAccessor(0) -{ -} - -QSGVisualDataModelData *QSGVisualDataModelPrivate::data(QObject *item) -{ - QSGVisualDataModelData *dataItem = - item->findChild<QSGVisualDataModelData *>(); - Q_ASSERT(dataItem); - return dataItem; -} - -//--------------------------------------------------------------------------- - -/*! - \qmlclass VisualDataModel QSGVisualDataModel - \inqmlmodule QtQuick 2 - \ingroup qml-working-with-data - \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 VisualDataModel elements. - However, it can be useful for manipulating and accessing the \l modelIndex - when a QAbstractItemModel subclass is used as the - model. Also, VisualDataModel is used together with \l Package to - provide delegates to multiple views. - - The example below illustrates using a VisualDataModel with a ListView. - - \snippet doc/src/snippets/declarative/visualdatamodel.qml 0 -*/ - -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(); -} - -/*! - \qmlproperty model QtQuick2::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 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_delegateDataType = 0; - d->createModelData = &QSGVisualDataModelPrivate::initializeModelData; - - 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))); - 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())); - 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) - if (d->m_delegate && d->modelCount()) { - emit itemsInserted(0, d->modelCount()); - emit countChanged(); - } -} - -/*! - \qmlproperty Component QtQuick2::VisualDataModel::delegate - - The delegate provides a template defining each item instantiated by a view. - The index is exposed as an accessible \c index property. Properties of the - model are also available depending upon the type of \l {qmlmodels}{Data Model}. -*/ -QDeclarativeComponent *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()) { - _q_itemsRemoved(0, d->modelCount()); - emit countChanged(); - } -} - -/*! - \qmlproperty QModelIndex QtQuick2::VisualDataModel::rootIndex - - QAbstractItemModel provides a hierarchical tree of data, whereas - QML only operates on list data. \c rootIndex allows the children of - any node in a QAbstractItemModel to be provided by this model. - - This property only affects models of type QAbstractItemModel that - are hierarchical (e.g, a tree model). - - For example, here is a simple interactive file system browser. - When a directory name is clicked, the view's \c rootIndex is set to the - QModelIndex node of the clicked directory, thus updating the view to show - the new directory's contents. - - \c main.cpp: - \snippet doc/src/snippets/declarative/visualdatamodel_rootindex/main.cpp 0 - - \c view.qml: - \snippet doc/src/snippets/declarative/visualdatamodel_rootindex/view.qml 0 - - If the \l model is a QAbstractItemModel subclass, the delegate can also - reference a \c hasModelChildren property (optionally qualified by a - \e model. prefix) that indicates whether the delegate's model item has - any child nodes. - - - \sa modelIndex(), parentModelIndex() -*/ -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) - _q_itemsRemoved(0, oldCount); - if (d->m_delegate && newCount) - emit itemsInserted(0, newCount); - if (newCount != oldCount) - emit countChanged(); - emit rootIndexChanged(); - } -} - -/*! - \qmlmethod QModelIndex QtQuick2::VisualDataModel::modelIndex(int index) - - QAbstractItemModel provides a hierarchical tree of data, whereas - QML only operates on list data. This function assists in using - tree models in QML. - - Returns a QModelIndex for the specified index. - This value can be assigned to rootIndex. - - \sa rootIndex -*/ -QVariant 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()); -} - -/*! - \qmlmethod QModelIndex QtQuick2::VisualDataModel::parentModelIndex() - - QAbstractItemModel provides a hierarchical tree of data, whereas - QML only operates on list data. This function assists in using - tree models in QML. - - Returns a QModelIndex for the parent of the current rootIndex. - This value can be assigned to rootIndex. - - \sa rootIndex -*/ -QVariant 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()); -} - -/*! - \qmlproperty object QtQuick2::VisualDataModel::parts - - The \a parts property selects a VisualDataModel which creates - delegates from the part named. This is used in conjunction with - the \l Package element. - - For example, the code below selects a model which creates - delegates named \e list from a \l 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 -*/ -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); - if (d->m_objectList) { - ctxt->setContextObject(d->m_listAccessor->at(index).value<QObject *>()); - ctxt = new QDeclarativeContext(ctxt); - } - QSGVisualDataModelData *data = d->createModelData(index, this); - 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 = d->createModelData(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); - } - } - - QVector<int> signalIndexes; - for (int i = 0; i < roles.count(); ++i) { - const int role = roles.at(i); - if (!changed && d->watchedRoleIds.contains(role)) - changed = true; - for (int propertyId = 0; propertyId < d->m_propertyData.count(); ++propertyId) { - if (d->m_propertyData.at(propertyId).role == role) - signalIndexes.append(propertyId + d->m_delegateDataType->signalOffset); - } - } - if (roles.isEmpty()) { - for (int propertyId = 0; propertyId < d->m_propertyData.count(); ++propertyId) - signalIndexes.append(propertyId + d->m_delegateDataType->signalOffset); - } - - 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 i = 0; i < signalIndexes.count(); ++i) - QMetaObject::activate(data, signalIndexes.at(i), 0); - } - } - 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-count, 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> |