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Diffstat (limited to 'src/quick/items/qquickvisualdatamodel.cpp')
| -rw-r--r-- | src/quick/items/qquickvisualdatamodel.cpp | 3173 |
1 files changed, 0 insertions, 3173 deletions
diff --git a/src/quick/items/qquickvisualdatamodel.cpp b/src/quick/items/qquickvisualdatamodel.cpp deleted file mode 100644 index d2e50e8b8a..0000000000 --- a/src/quick/items/qquickvisualdatamodel.cpp +++ /dev/null @@ -1,3173 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/legal -** -** This file is part of the QtQml module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and Digia. For licensing terms and -** conditions see http://qt.digia.com/licensing. For further information -** use the contact form at http://qt.digia.com/contact-us. -** -** 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, Digia gives you certain additional -** rights. These rights are described in the Digia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3.0 as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU General Public License version 3.0 requirements will be -** met: http://www.gnu.org/copyleft/gpl.html. -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qquickvisualdatamodel_p_p.h" -#include "qquickitem.h" - -#include <QtQml/qqmlinfo.h> - -#include <private/qquickpackage_p.h> -#include <private/qmetaobjectbuilder_p.h> -#include <private/qquickvisualadaptormodel_p.h> -#include <private/qquickchangeset_p.h> -#include <private/qqmlengine_p.h> -#include <private/qqmlcomponent_p.h> -#include <private/qqmlincubator_p.h> -#include <private/qqmlcompiler_p.h> - -QT_BEGIN_NAMESPACE - -class QQuickVisualDataModelEngineData : public QV8Engine::Deletable -{ -public: - enum - { - Model, - Groups, - IsUnresolved, - ItemsIndex, - PersistedItemsIndex, - InItems, - InPersistedItems, - StringCount - }; - - QQuickVisualDataModelEngineData(QV8Engine *engine); - ~QQuickVisualDataModelEngineData(); - - v8::Local<v8::Object> array( - QV8Engine *engine, const QVector<QQuickChangeSet::Remove> &changes); - v8::Local<v8::Object> array( - QV8Engine *engine, const QVector<QQuickChangeSet::Insert> &changes); - v8::Local<v8::Object> array( - QV8Engine *engine, const QVector<QQuickChangeSet::Change> &changes); - - - inline v8::Local<v8::String> model() { return strings->Get(Model)->ToString(); } - inline v8::Local<v8::String> groups() { return strings->Get(Groups)->ToString(); } - inline v8::Local<v8::String> isUnresolved() { return strings->Get(IsUnresolved)->ToString(); } - inline v8::Local<v8::String> itemsIndex() { return strings->Get(ItemsIndex)->ToString(); } - inline v8::Local<v8::String> persistedItemsIndex() { return strings->Get(PersistedItemsIndex)->ToString(); } - inline v8::Local<v8::String> inItems() { return strings->Get(InItems)->ToString(); } - inline v8::Local<v8::String> inPersistedItems() { return strings->Get(InPersistedItems)->ToString(); } - - v8::Persistent<v8::Array> strings; - v8::Persistent<v8::Function> constructorChange; - v8::Persistent<v8::Function> constructorChangeArray; -}; - -V8_DEFINE_EXTENSION(QQuickVisualDataModelEngineData, engineData) - - -void QQuickVisualDataModelPartsMetaObject::propertyCreated(int, QMetaPropertyBuilder &prop) -{ - prop.setWritable(false); -} - -QVariant QQuickVisualDataModelPartsMetaObject::initialValue(int id) -{ - QQuickVisualDataModelParts *parts = static_cast<QQuickVisualDataModelParts *>(object()); - QQuickVisualPartsModel *m = new QQuickVisualPartsModel( - parts->model, QString::fromUtf8(name(id)), parts); - parts->models.append(m); - return QVariant::fromValue(static_cast<QObject *>(m)); -} - -QQuickVisualDataModelParts::QQuickVisualDataModelParts(QQuickVisualDataModel *parent) -: QObject(parent), model(parent) -{ - new QQuickVisualDataModelPartsMetaObject(this); -} - -//--------------------------------------------------------------------------- - -/*! - \qmltype VisualDataModel - \instantiates QQuickVisualDataModel - \inqmlmodule QtQuick 2 - \ingroup qtquick-models - \brief Encapsulates a model and delegate - - The VisualDataModel type encapsulates a model and the delegate that will - be instantiated for items in the model. - - It is usually not necessary to create a VisualDataModel. - 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, and with VisualDataGroup to sort and filter - delegate items. - - The example below illustrates using a VisualDataModel with a ListView. - - \snippet qml/visualdatamodel.qml 0 -*/ - -QQuickVisualDataModelPrivate::QQuickVisualDataModelPrivate(QQmlContext *ctxt) - : m_delegate(0) - , m_cacheMetaType(0) - , m_context(ctxt) - , m_parts(0) - , m_filterGroup(QStringLiteral("items")) - , m_count(0) - , m_groupCount(Compositor::MinimumGroupCount) - , m_compositorGroup(Compositor::Cache) - , m_complete(false) - , m_delegateValidated(false) - , m_reset(false) - , m_transaction(false) - , m_incubatorCleanupScheduled(false) - , m_cacheItems(0) - , m_items(0) - , m_persistedItems(0) -{ -} - -QQuickVisualDataModelPrivate::~QQuickVisualDataModelPrivate() -{ - qDeleteAll(m_finishedIncubating); - - if (m_cacheMetaType) - m_cacheMetaType->release(); -} - -void QQuickVisualDataModelPrivate::init() -{ - Q_Q(QQuickVisualDataModel); - m_compositor.setRemoveGroups(Compositor::GroupMask & ~Compositor::PersistedFlag); - - m_items = new QQuickVisualDataGroup(QStringLiteral("items"), q, Compositor::Default, q); - m_items->setDefaultInclude(true); - m_persistedItems = new QQuickVisualDataGroup(QStringLiteral("persistedItems"), q, Compositor::Persisted, q); - QQuickVisualDataGroupPrivate::get(m_items)->emitters.insert(this); -} - -QQuickVisualDataModel::QQuickVisualDataModel() -: QQuickVisualModel(*(new QQuickVisualDataModelPrivate(0))) -{ - Q_D(QQuickVisualDataModel); - d->init(); -} - -QQuickVisualDataModel::QQuickVisualDataModel(QQmlContext *ctxt, QObject *parent) -: QQuickVisualModel(*(new QQuickVisualDataModelPrivate(ctxt)), parent) -{ - Q_D(QQuickVisualDataModel); - d->init(); -} - -QQuickVisualDataModel::~QQuickVisualDataModel() -{ - Q_D(QQuickVisualDataModel); - - foreach (QQuickVisualDataModelItem *cacheItem, d->m_cache) { - if (cacheItem->object) { - delete cacheItem->object; - - cacheItem->object = 0; - cacheItem->contextData->destroy(); - cacheItem->contextData = 0; - cacheItem->scriptRef -= 1; - } - cacheItem->groups &= ~Compositor::UnresolvedFlag; - cacheItem->objectRef = 0; - if (!cacheItem->isReferenced()) - delete cacheItem; - } -} - - -void QQuickVisualDataModel::classBegin() -{ - Q_D(QQuickVisualDataModel); - if (!d->m_context) - d->m_context = qmlContext(this); -} - -void QQuickVisualDataModel::componentComplete() -{ - Q_D(QQuickVisualDataModel); - d->m_complete = true; - - int defaultGroups = 0; - QStringList groupNames; - groupNames.append(QStringLiteral("items")); - groupNames.append(QStringLiteral("persistedItems")); - if (QQuickVisualDataGroupPrivate::get(d->m_items)->defaultInclude) - defaultGroups |= Compositor::DefaultFlag; - if (QQuickVisualDataGroupPrivate::get(d->m_persistedItems)->defaultInclude) - defaultGroups |= Compositor::PersistedFlag; - for (int i = Compositor::MinimumGroupCount; i < d->m_groupCount; ++i) { - QString name = d->m_groups[i]->name(); - if (name.isEmpty()) { - d->m_groups[i] = d->m_groups[d->m_groupCount - 1]; - --d->m_groupCount; - --i; - } else if (name.at(0).isUpper()) { - qmlInfo(d->m_groups[i]) << QQuickVisualDataGroup::tr("Group names must start with a lower case letter"); - d->m_groups[i] = d->m_groups[d->m_groupCount - 1]; - --d->m_groupCount; - --i; - } else { - groupNames.append(name); - - QQuickVisualDataGroupPrivate *group = QQuickVisualDataGroupPrivate::get(d->m_groups[i]); - group->setModel(this, Compositor::Group(i)); - if (group->defaultInclude) - defaultGroups |= (1 << i); - } - } - - d->m_cacheMetaType = new QQuickVisualDataModelItemMetaType( - QQmlEnginePrivate::getV8Engine(d->m_context->engine()), this, groupNames); - - d->m_compositor.setGroupCount(d->m_groupCount); - d->m_compositor.setDefaultGroups(defaultGroups); - d->updateFilterGroup(); - - while (!d->m_pendingParts.isEmpty()) - static_cast<QQuickVisualPartsModel *>(d->m_pendingParts.first())->updateFilterGroup(); - - QVector<Compositor::Insert> inserts; - d->m_count = d->m_adaptorModel.count(); - d->m_compositor.append( - &d->m_adaptorModel, - 0, - d->m_count, - defaultGroups | Compositor::AppendFlag | Compositor::PrependFlag, - &inserts); - d->itemsInserted(inserts); - d->emitChanges(); - - if (d->m_adaptorModel.canFetchMore()) - QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest)); -} - -/*! - \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 {qml-data-models}{Data Models} -*/ -QVariant QQuickVisualDataModel::model() const -{ - Q_D(const QQuickVisualDataModel); - return d->m_adaptorModel.model(); -} - -void QQuickVisualDataModel::setModel(const QVariant &model) -{ - Q_D(QQuickVisualDataModel); - - if (d->m_complete) - _q_itemsRemoved(0, d->m_count); - - d->m_adaptorModel.setModel(model, this, d->m_context->engine()); - d->m_adaptorModel.replaceWatchedRoles(QList<QByteArray>(), d->m_watchedRoles); - for (int i = 0; d->m_parts && i < d->m_parts->models.count(); ++i) { - d->m_adaptorModel.replaceWatchedRoles( - QList<QByteArray>(), d->m_parts->models.at(i)->watchedRoles()); - } - - if (d->m_complete) { - _q_itemsInserted(0, d->m_adaptorModel.count()); - if (d->m_adaptorModel.canFetchMore()) - QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest)); - } -} - -/*! - \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 {qml-data-models}{Data Model}. -*/ -QQmlComponent *QQuickVisualDataModel::delegate() const -{ - Q_D(const QQuickVisualDataModel); - return d->m_delegate; -} - -void QQuickVisualDataModel::setDelegate(QQmlComponent *delegate) -{ - Q_D(QQuickVisualDataModel); - if (d->m_transaction) { - qmlInfo(this) << tr("The delegate of a VisualDataModel cannot be changed within onUpdated."); - return; - } - bool wasValid = d->m_delegate != 0; - d->m_delegate = delegate; - d->m_delegateValidated = false; - if (wasValid && d->m_complete) { - for (int i = 1; i < d->m_groupCount; ++i) { - QQuickVisualDataGroupPrivate::get(d->m_groups[i])->changeSet.remove( - 0, d->m_compositor.count(Compositor::Group(i))); - } - } - if (d->m_complete && d->m_delegate) { - for (int i = 1; i < d->m_groupCount; ++i) { - QQuickVisualDataGroupPrivate::get(d->m_groups[i])->changeSet.insert( - 0, d->m_compositor.count(Compositor::Group(i))); - } - } - d->emitChanges(); -} - -/*! - \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 qml/visualdatamodel_rootindex/main.cpp 0 - - \c view.qml: - \snippet qml/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 QQuickVisualDataModel::rootIndex() const -{ - Q_D(const QQuickVisualDataModel); - return QVariant::fromValue(QModelIndex(d->m_adaptorModel.rootIndex)); -} - -void QQuickVisualDataModel::setRootIndex(const QVariant &root) -{ - Q_D(QQuickVisualDataModel); - - QModelIndex modelIndex = qvariant_cast<QModelIndex>(root); - const bool changed = d->m_adaptorModel.rootIndex != modelIndex; - if (changed || !d->m_adaptorModel.isValid()) { - const int oldCount = d->m_count; - d->m_adaptorModel.rootIndex = modelIndex; - if (!d->m_adaptorModel.isValid() && d->m_adaptorModel.aim()) // The previous root index was invalidated, so we need to reconnect the model. - d->m_adaptorModel.setModel(d->m_adaptorModel.list.list(), this, d->m_context->engine()); - if (d->m_adaptorModel.canFetchMore()) - d->m_adaptorModel.fetchMore(); - if (d->m_complete) { - const int newCount = d->m_adaptorModel.count(); - if (oldCount) - _q_itemsRemoved(0, oldCount); - if (newCount) - _q_itemsInserted(0, newCount); - } - if (changed) - 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 QQuickVisualDataModel::modelIndex(int idx) const -{ - Q_D(const QQuickVisualDataModel); - return d->m_adaptorModel.modelIndex(idx); -} - -/*! - \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 QQuickVisualDataModel::parentModelIndex() const -{ - Q_D(const QQuickVisualDataModel); - return d->m_adaptorModel.parentModelIndex(); -} - -/*! - \qmlproperty int QtQuick2::VisualDataModel::count -*/ - -int QQuickVisualDataModel::count() const -{ - Q_D(const QQuickVisualDataModel); - if (!d->m_delegate) - return 0; - return d->m_compositor.count(d->m_compositorGroup); -} - -QQuickVisualDataModel::ReleaseFlags QQuickVisualDataModelPrivate::release(QObject *object) -{ - QQuickVisualDataModel::ReleaseFlags stat = 0; - if (!object) - return stat; - - if (QQuickVisualDataModelItem *cacheItem = QQuickVisualDataModelItem::dataForObject(object)) { - if (cacheItem->releaseObject()) { - cacheItem->destroyObject(); - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(object)) - emitDestroyingItem(item); - if (cacheItem->incubationTask) { - releaseIncubator(cacheItem->incubationTask); - cacheItem->incubationTask = 0; - } - cacheItem->Dispose(); - stat |= QQuickVisualModel::Destroyed; - } else { - stat |= QQuickVisualDataModel::Referenced; - } - } - return stat; -} - -/* - Returns ReleaseStatus flags. -*/ - -QQuickVisualDataModel::ReleaseFlags QQuickVisualDataModel::release(QQuickItem *item) -{ - Q_D(QQuickVisualDataModel); - QQuickVisualModel::ReleaseFlags stat = d->release(item); - if (stat & Destroyed) - item->setParentItem(0); - return stat; -} - -// Cancel a requested async item -void QQuickVisualDataModel::cancel(int index) -{ - Q_D(QQuickVisualDataModel); - if (!d->m_delegate || index < 0 || index >= d->m_compositor.count(d->m_compositorGroup)) { - qWarning() << "VisualDataModel::cancel: index out range" << index << d->m_compositor.count(d->m_compositorGroup); - return; - } - - Compositor::iterator it = d->m_compositor.find(d->m_compositorGroup, index); - QQuickVisualDataModelItem *cacheItem = it->inCache() ? d->m_cache.at(it.cacheIndex) : 0; - if (cacheItem) { - if (cacheItem->incubationTask && !cacheItem->isObjectReferenced()) { - d->releaseIncubator(cacheItem->incubationTask); - cacheItem->incubationTask = 0; - - if (cacheItem->object) { - QObject *object = cacheItem->object; - cacheItem->destroyObject(); - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(object)) - d->emitDestroyingItem(item); - else if (QQuickPackage *package = qmlobject_cast<QQuickPackage *>(object)) - d->emitDestroyingPackage(package); - } - - cacheItem->scriptRef -= 1; - } - if (!cacheItem->isReferenced()) { - d->m_compositor.clearFlags(Compositor::Cache, it.cacheIndex, 1, Compositor::CacheFlag); - d->m_cache.removeAt(it.cacheIndex); - delete cacheItem; - Q_ASSERT(d->m_cache.count() == d->m_compositor.count(Compositor::Cache)); - } - } -} - -void QQuickVisualDataModelPrivate::group_append( - QQmlListProperty<QQuickVisualDataGroup> *property, QQuickVisualDataGroup *group) -{ - QQuickVisualDataModelPrivate *d = static_cast<QQuickVisualDataModelPrivate *>(property->data); - if (d->m_complete) - return; - if (d->m_groupCount == Compositor::MaximumGroupCount) { - qmlInfo(d->q_func()) << QQuickVisualDataModel::tr("The maximum number of supported VisualDataGroups is 8"); - return; - } - d->m_groups[d->m_groupCount] = group; - d->m_groupCount += 1; -} - -int QQuickVisualDataModelPrivate::group_count( - QQmlListProperty<QQuickVisualDataGroup> *property) -{ - QQuickVisualDataModelPrivate *d = static_cast<QQuickVisualDataModelPrivate *>(property->data); - return d->m_groupCount - 1; -} - -QQuickVisualDataGroup *QQuickVisualDataModelPrivate::group_at( - QQmlListProperty<QQuickVisualDataGroup> *property, int index) -{ - QQuickVisualDataModelPrivate *d = static_cast<QQuickVisualDataModelPrivate *>(property->data); - return index >= 0 && index < d->m_groupCount - 1 - ? d->m_groups[index + 1] - : 0; -} - -/*! - \qmlproperty list<VisualDataGroup> QtQuick2::VisualDataModel::groups - - This property holds a visual data model's group definitions. - - Groups define a sub-set of the items in a visual data model and can be used to filter - a model. - - For every group defined in a VisualDataModel two attached properties are added to each - delegate item. The first of the form VisualDataModel.in\e{GroupName} holds whether the - item belongs to the group and the second VisualDataModel.\e{groupName}Index holds the - index of the item in that group. - - The following example illustrates using groups to select items in a model. - - \snippet qml/visualdatagroup.qml 0 -*/ - -QQmlListProperty<QQuickVisualDataGroup> QQuickVisualDataModel::groups() -{ - Q_D(QQuickVisualDataModel); - return QQmlListProperty<QQuickVisualDataGroup>( - this, - d, - QQuickVisualDataModelPrivate::group_append, - QQuickVisualDataModelPrivate::group_count, - QQuickVisualDataModelPrivate::group_at, - 0); -} - -/*! - \qmlproperty VisualDataGroup QtQuick2::VisualDataModel::items - - This property holds visual data model's default group to which all new items are added. -*/ - -QQuickVisualDataGroup *QQuickVisualDataModel::items() -{ - Q_D(QQuickVisualDataModel); - return d->m_items; -} - -/*! - \qmlproperty VisualDataGroup QtQuick2::VisualDataModel::persistedItems - - This property holds visual data model's persisted items group. - - Items in this group are not destroyed when released by a view, instead they are persisted - until removed from the group. - - An item can be removed from the persistedItems group by setting the - VisualDataModel.inPersistedItems property to false. If the item is not referenced by a view - at that time it will be destroyed. Adding an item to this group will not create a new - instance. - - Items returned by the \l QtQuick2::VisualDataGroup::create() function are automatically added - to this group. -*/ - -QQuickVisualDataGroup *QQuickVisualDataModel::persistedItems() -{ - Q_D(QQuickVisualDataModel); - return d->m_persistedItems; -} - -/*! - \qmlproperty string QtQuick2::VisualDataModel::filterOnGroup - - This property holds the name of the group used to filter the visual data model. - - Only items which belong to this group are visible to a view. - - By default this is the \l items group. -*/ - -QString QQuickVisualDataModel::filterGroup() const -{ - Q_D(const QQuickVisualDataModel); - return d->m_filterGroup; -} - -void QQuickVisualDataModel::setFilterGroup(const QString &group) -{ - Q_D(QQuickVisualDataModel); - - if (d->m_transaction) { - qmlInfo(this) << tr("The group of a VisualDataModel cannot be changed within onChanged"); - return; - } - - if (d->m_filterGroup != group) { - d->m_filterGroup = group; - d->updateFilterGroup(); - emit filterGroupChanged(); - } -} - -void QQuickVisualDataModel::resetFilterGroup() -{ - setFilterGroup(QStringLiteral("items")); -} - -void QQuickVisualDataModelPrivate::updateFilterGroup() -{ - Q_Q(QQuickVisualDataModel); - if (!m_cacheMetaType) - return; - - QQuickListCompositor::Group previousGroup = m_compositorGroup; - m_compositorGroup = Compositor::Default; - for (int i = 1; i < m_groupCount; ++i) { - if (m_filterGroup == m_cacheMetaType->groupNames.at(i - 1)) { - m_compositorGroup = Compositor::Group(i); - break; - } - } - - QQuickVisualDataGroupPrivate::get(m_groups[m_compositorGroup])->emitters.insert(this); - if (m_compositorGroup != previousGroup) { - QVector<QQuickChangeSet::Remove> removes; - QVector<QQuickChangeSet::Insert> inserts; - m_compositor.transition(previousGroup, m_compositorGroup, &removes, &inserts); - - QQuickChangeSet changeSet; - changeSet.move(removes, inserts); - emit q->modelUpdated(changeSet, false); - - if (changeSet.difference() != 0) - emit q->countChanged(); - - if (m_parts) { - foreach (QQuickVisualPartsModel *model, m_parts->models) - model->updateFilterGroup(m_compositorGroup, changeSet); - } - } -} - -/*! - \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 type. - - 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 -*/ - -QObject *QQuickVisualDataModel::parts() -{ - Q_D(QQuickVisualDataModel); - if (!d->m_parts) - d->m_parts = new QQuickVisualDataModelParts(this); - return d->m_parts; -} - -void QQuickVisualDataModelPrivate::emitCreatedPackage(QVDMIncubationTask *incubationTask, QQuickPackage *package) -{ - for (int i = 1; i < m_groupCount; ++i) - QQuickVisualDataGroupPrivate::get(m_groups[i])->createdPackage(incubationTask->index[i], package); -} - -void QQuickVisualDataModelPrivate::emitInitPackage(QVDMIncubationTask *incubationTask, QQuickPackage *package) -{ - for (int i = 1; i < m_groupCount; ++i) - QQuickVisualDataGroupPrivate::get(m_groups[i])->initPackage(incubationTask->index[i], package); -} - -void QQuickVisualDataModelPrivate::emitDestroyingPackage(QQuickPackage *package) -{ - for (int i = 1; i < m_groupCount; ++i) - QQuickVisualDataGroupPrivate::get(m_groups[i])->destroyingPackage(package); -} - -void QVDMIncubationTask::statusChanged(Status status) -{ - vdm->incubatorStatusChanged(this, status); -} - -void QQuickVisualDataModelPrivate::releaseIncubator(QVDMIncubationTask *incubationTask) -{ - Q_Q(QQuickVisualDataModel); - if (!incubationTask->isError()) - incubationTask->clear(); - m_finishedIncubating.append(incubationTask); - if (!m_incubatorCleanupScheduled) { - m_incubatorCleanupScheduled = true; - QCoreApplication::postEvent(q, new QEvent(QEvent::User)); - } -} - -void QQuickVisualDataModelPrivate::removeCacheItem(QQuickVisualDataModelItem *cacheItem) -{ - int cidx = m_cache.indexOf(cacheItem); - if (cidx >= 0) { - m_compositor.clearFlags(Compositor::Cache, cidx, 1, Compositor::CacheFlag); - m_cache.removeAt(cidx); - } - Q_ASSERT(m_cache.count() == m_compositor.count(Compositor::Cache)); -} - -void QQuickVisualDataModelPrivate::incubatorStatusChanged(QVDMIncubationTask *incubationTask, QQmlIncubator::Status status) -{ - Q_Q(QQuickVisualDataModel); - if (status != QQmlIncubator::Ready && status != QQmlIncubator::Error) - return; - - QQuickVisualDataModelItem *cacheItem = incubationTask->incubating; - cacheItem->incubationTask = 0; - incubationTask->incubating = 0; - releaseIncubator(incubationTask); - - if (status == QQmlIncubator::Ready) { - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(cacheItem->object)) - emitCreatedItem(incubationTask, item); - else if (QQuickPackage *package = qmlobject_cast<QQuickPackage *>(cacheItem->object)) - emitCreatedPackage(incubationTask, package); - } else if (status == QQmlIncubator::Error) { - qmlInfo(q, m_delegate->errors()) << "Error creating delegate"; - } - - if (!cacheItem->isObjectReferenced()) { - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(cacheItem->object)) - emitDestroyingItem(item); - else if (QQuickPackage *package = qmlobject_cast<QQuickPackage *>(cacheItem->object)) - emitDestroyingPackage(package); - delete cacheItem->object; - cacheItem->object = 0; - cacheItem->scriptRef -= 1; - cacheItem->contextData->destroy(); - cacheItem->contextData = 0; - if (!cacheItem->isReferenced()) { - removeCacheItem(cacheItem); - delete cacheItem; - } - } -} - -void QVDMIncubationTask::setInitialState(QObject *o) -{ - vdm->setInitialState(this, o); -} - -void QQuickVisualDataModelPrivate::setInitialState(QVDMIncubationTask *incubationTask, QObject *o) -{ - QQuickVisualDataModelItem *cacheItem = incubationTask->incubating; - cacheItem->object = o; - - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(cacheItem->object)) - emitInitItem(incubationTask, item); - else if (QQuickPackage *package = qmlobject_cast<QQuickPackage *>(cacheItem->object)) - emitInitPackage(incubationTask, package); -} - -QObject *QQuickVisualDataModelPrivate::object(Compositor::Group group, int index, bool asynchronous) -{ - Q_Q(QQuickVisualDataModel); - if (!m_delegate || index < 0 || index >= m_compositor.count(group)) { - qWarning() << "VisualDataModel::item: index out range" << index << m_compositor.count(group); - return 0; - } else if (!m_context->isValid()) { - return 0; - } - - Compositor::iterator it = m_compositor.find(group, index); - - QQuickVisualDataModelItem *cacheItem = it->inCache() ? m_cache.at(it.cacheIndex) : 0; - - if (!cacheItem) { - cacheItem = m_adaptorModel.createItem(m_cacheMetaType, m_context->engine(), it.modelIndex()); - if (!cacheItem) - return 0; - - cacheItem->groups = it->flags; - - m_cache.insert(it.cacheIndex, cacheItem); - m_compositor.setFlags(it, 1, Compositor::CacheFlag); - Q_ASSERT(m_cache.count() == m_compositor.count(Compositor::Cache)); - } - - // Bump the reference counts temporarily so neither the content data or the delegate object - // are deleted if incubatorStatusChanged() is called synchronously. - cacheItem->scriptRef += 1; - cacheItem->referenceObject(); - - if (cacheItem->incubationTask) { - if (!asynchronous && cacheItem->incubationTask->incubationMode() == QQmlIncubator::Asynchronous) { - // previously requested async - now needed immediately - cacheItem->incubationTask->forceCompletion(); - } - } else if (!cacheItem->object) { - QQmlContext *creationContext = m_delegate->creationContext(); - - cacheItem->scriptRef += 1; - - cacheItem->incubationTask = new QVDMIncubationTask(this, asynchronous ? QQmlIncubator::Asynchronous : QQmlIncubator::AsynchronousIfNested); - cacheItem->incubationTask->incubating = cacheItem; - cacheItem->incubationTask->clear(); - - for (int i = 1; i < m_groupCount; ++i) - cacheItem->incubationTask->index[i] = it.index[i]; - - QQmlContextData *ctxt = new QQmlContextData; - ctxt->setParent(QQmlContextData::get(creationContext ? creationContext : m_context)); - ctxt->contextObject = cacheItem; - cacheItem->contextData = ctxt; - - if (m_adaptorModel.hasProxyObject()) { - if (QQuickVisualAdaptorModelProxyInterface *proxy - = qobject_cast<QQuickVisualAdaptorModelProxyInterface *>(cacheItem)) { - ctxt = new QQmlContextData; - ctxt->setParent(cacheItem->contextData, true); - ctxt->contextObject = proxy->proxiedObject(); - } - } - - cacheItem->incubateObject( - m_delegate, - m_context->engine(), - ctxt, - QQmlContextData::get(m_context)); - } - - if (index == m_compositor.count(group) - 1 && m_adaptorModel.canFetchMore()) - QCoreApplication::postEvent(q, new QEvent(QEvent::UpdateRequest)); - - // Remove the temporary reference count. - cacheItem->scriptRef -= 1; - if (cacheItem->object) - return cacheItem->object; - - cacheItem->releaseObject(); - if (!cacheItem->isReferenced()) { - removeCacheItem(cacheItem); - delete cacheItem; - } - - return 0; -} - -/* - If asynchronous is true or the component is being loaded asynchronously due - to an ancestor being loaded asynchronously, item() may return 0. In this - case itemCreated() will be emitted when the item is available. The item - at this stage does not have any references, so item() must be called again - to ensure a reference is held. Any call to item() which returns a valid item - must be matched by a call to release() in order to destroy the item. -*/ -QQuickItem *QQuickVisualDataModel::item(int index, bool asynchronous) -{ - Q_D(QQuickVisualDataModel); - if (!d->m_delegate || index < 0 || index >= d->m_compositor.count(d->m_compositorGroup)) { - qWarning() << "VisualDataModel::item: index out range" << index << d->m_compositor.count(d->m_compositorGroup); - return 0; - } - - QObject *object = d->object(d->m_compositorGroup, index, asynchronous); - if (!object) - return 0; - - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(object)) - return item; - - d->release(object); - if (!d->m_delegateValidated) { - if (object) - qmlInfo(d->m_delegate) << QQuickVisualDataModel::tr("Delegate component must be Item type."); - d->m_delegateValidated = true; - } - return 0; -} - -QString QQuickVisualDataModelPrivate::stringValue(Compositor::Group group, int index, const QString &name) -{ - Compositor::iterator it = m_compositor.find(group, index); - if (QQuickVisualAdaptorModel *model = it.list<QQuickVisualAdaptorModel>()) { - QString role = name; - int dot = name.indexOf(QLatin1Char('.')); - if (dot > 0) - role = name.left(dot); - QVariant value = model->value(it.modelIndex(), role); - while (dot > 0) { - QObject *obj = qvariant_cast<QObject*>(value); - if (!obj) - return QString(); - int from = dot+1; - dot = name.indexOf(QLatin1Char('.'), from); - value = obj->property(name.mid(from, dot-from).toUtf8()); - } - return value.toString(); - } - return QString(); -} - -QString QQuickVisualDataModel::stringValue(int index, const QString &name) -{ - Q_D(QQuickVisualDataModel); - return d->stringValue(d->m_compositorGroup, index, name); -} - -int QQuickVisualDataModel::indexOf(QQuickItem *item, QObject *) const -{ - Q_D(const QQuickVisualDataModel); - if (QQuickVisualDataModelItem *cacheItem = QQuickVisualDataModelItem::dataForObject(item)) - return cacheItem->groupIndex(d->m_compositorGroup); - return -1; -} - -void QQuickVisualDataModel::setWatchedRoles(QList<QByteArray> roles) -{ - Q_D(QQuickVisualDataModel); - d->m_adaptorModel.replaceWatchedRoles(d->m_watchedRoles, roles); - d->m_watchedRoles = roles; -} - -void QQuickVisualDataModelPrivate::addGroups( - Compositor::iterator from, int count, Compositor::Group group, int groupFlags) -{ - QVector<Compositor::Insert> inserts; - m_compositor.setFlags(from, count, group, groupFlags, &inserts); - itemsInserted(inserts); - emitChanges(); -} - -void QQuickVisualDataModelPrivate::removeGroups( - Compositor::iterator from, int count, Compositor::Group group, int groupFlags) -{ - QVector<Compositor::Remove> removes; - m_compositor.clearFlags(from, count, group, groupFlags, &removes); - itemsRemoved(removes); - emitChanges(); -} - -void QQuickVisualDataModelPrivate::setGroups( - Compositor::iterator from, int count, Compositor::Group group, int groupFlags) -{ - QVector<Compositor::Remove> removes; - QVector<Compositor::Insert> inserts; - - m_compositor.setFlags(from, count, group, groupFlags, &inserts); - itemsInserted(inserts); - const int removeFlags = ~groupFlags & Compositor::GroupMask; - - from = m_compositor.find(from.group, from.index[from.group]); - m_compositor.clearFlags(from, count, group, removeFlags, &removes); - itemsRemoved(removes); - emitChanges(); -} - -bool QQuickVisualDataModel::event(QEvent *e) -{ - Q_D(QQuickVisualDataModel); - if (e->type() == QEvent::UpdateRequest) { - d->m_adaptorModel.fetchMore(); - } else if (e->type() == QEvent::User) { - d->m_incubatorCleanupScheduled = false; - qDeleteAll(d->m_finishedIncubating); - d->m_finishedIncubating.clear(); - } - return QQuickVisualModel::event(e); -} - -void QQuickVisualDataModelPrivate::itemsChanged(const QVector<Compositor::Change> &changes) -{ - if (!m_delegate) - return; - - QVarLengthArray<QVector<QQuickChangeSet::Change>, Compositor::MaximumGroupCount> translatedChanges(m_groupCount); - - foreach (const Compositor::Change &change, changes) { - for (int i = 1; i < m_groupCount; ++i) { - if (change.inGroup(i)) { - translatedChanges[i].append(QQuickChangeSet::Change(change.index[i], change.count)); - } - } - } - - for (int i = 1; i < m_groupCount; ++i) - QQuickVisualDataGroupPrivate::get(m_groups[i])->changeSet.change(translatedChanges.at(i)); -} - -void QQuickVisualDataModel::_q_itemsChanged(int index, int count, const QVector<int> &roles) -{ - Q_D(QQuickVisualDataModel); - if (count <= 0 || !d->m_complete) - return; - - if (d->m_adaptorModel.notify(d->m_cache, index, count, roles)) { - QVector<Compositor::Change> changes; - d->m_compositor.listItemsChanged(&d->m_adaptorModel, index, count, &changes); - d->itemsChanged(changes); - d->emitChanges(); - } -} - -static void incrementIndexes(QQuickVisualDataModelItem *cacheItem, int count, const int *deltas) -{ - if (QVDMIncubationTask *incubationTask = cacheItem->incubationTask) { - for (int i = 1; i < count; ++i) - incubationTask->index[i] += deltas[i]; - } - if (QQuickVisualDataModelAttached *attached = cacheItem->attached) { - for (int i = 1; i < count; ++i) - attached->m_currentIndex[i] += deltas[i]; - } -} - -void QQuickVisualDataModelPrivate::itemsInserted( - const QVector<Compositor::Insert> &inserts, - QVarLengthArray<QVector<QQuickChangeSet::Insert>, Compositor::MaximumGroupCount> *translatedInserts, - QHash<int, QList<QQuickVisualDataModelItem *> > *movedItems) -{ - int cacheIndex = 0; - - int inserted[Compositor::MaximumGroupCount]; - for (int i = 1; i < m_groupCount; ++i) - inserted[i] = 0; - - foreach (const Compositor::Insert &insert, inserts) { - for (; cacheIndex < insert.cacheIndex; ++cacheIndex) - incrementIndexes(m_cache.at(cacheIndex), m_groupCount, inserted); - - for (int i = 1; i < m_groupCount; ++i) { - if (insert.inGroup(i)) { - (*translatedInserts)[i].append( - QQuickChangeSet::Insert(insert.index[i], insert.count, insert.moveId)); - inserted[i] += insert.count; - } - } - - if (!insert.inCache()) - continue; - - if (movedItems && insert.isMove()) { - QList<QQuickVisualDataModelItem *> items = movedItems->take(insert.moveId); - Q_ASSERT(items.count() == insert.count); - m_cache = m_cache.mid(0, insert.cacheIndex) + items + m_cache.mid(insert.cacheIndex); - } - if (insert.inGroup()) { - for (int offset = 0; cacheIndex < insert.cacheIndex + insert.count; ++cacheIndex, ++offset) { - QQuickVisualDataModelItem *cacheItem = m_cache.at(cacheIndex); - cacheItem->groups |= insert.flags & Compositor::GroupMask; - - if (QVDMIncubationTask *incubationTask = cacheItem->incubationTask) { - for (int i = 1; i < m_groupCount; ++i) - incubationTask->index[i] = cacheItem->groups & (1 << i) - ? insert.index[i] + offset - : insert.index[i]; - } - if (QQuickVisualDataModelAttached *attached = cacheItem->attached) { - for (int i = 1; i < m_groupCount; ++i) - attached->m_currentIndex[i] = cacheItem->groups & (1 << i) - ? insert.index[i] + offset - : insert.index[i]; - } - } - } else { - cacheIndex = insert.cacheIndex + insert.count; - } - } - for (; cacheIndex < m_cache.count(); ++cacheIndex) - incrementIndexes(m_cache.at(cacheIndex), m_groupCount, inserted); -} - -void QQuickVisualDataModelPrivate::itemsInserted(const QVector<Compositor::Insert> &inserts) -{ - QVarLengthArray<QVector<QQuickChangeSet::Insert>, Compositor::MaximumGroupCount> translatedInserts(m_groupCount); - itemsInserted(inserts, &translatedInserts); - Q_ASSERT(m_cache.count() == m_compositor.count(Compositor::Cache)); - if (!m_delegate) - return; - - for (int i = 1; i < m_groupCount; ++i) - QQuickVisualDataGroupPrivate::get(m_groups[i])->changeSet.insert(translatedInserts.at(i)); -} - -void QQuickVisualDataModel::_q_itemsInserted(int index, int count) -{ - - Q_D(QQuickVisualDataModel); - if (count <= 0 || !d->m_complete) - return; - - d->m_count += count; - - for (int i = 0, c = d->m_cache.count(); i < c; ++i) { - QQuickVisualDataModelItem *item = d->m_cache.at(i); - if (item->modelIndex() >= index) - item->setModelIndex(item->modelIndex() + count); - } - - QVector<Compositor::Insert> inserts; - d->m_compositor.listItemsInserted(&d->m_adaptorModel, index, count, &inserts); - d->itemsInserted(inserts); - d->emitChanges(); -} - -void QQuickVisualDataModelPrivate::itemsRemoved( - const QVector<Compositor::Remove> &removes, - QVarLengthArray<QVector<QQuickChangeSet::Remove>, Compositor::MaximumGroupCount> *translatedRemoves, - QHash<int, QList<QQuickVisualDataModelItem *> > *movedItems) -{ - int cacheIndex = 0; - int removedCache = 0; - - int removed[Compositor::MaximumGroupCount]; - for (int i = 1; i < m_groupCount; ++i) - removed[i] = 0; - - foreach (const Compositor::Remove &remove, removes) { - for (; cacheIndex < remove.cacheIndex; ++cacheIndex) - incrementIndexes(m_cache.at(cacheIndex), m_groupCount, removed); - - for (int i = 1; i < m_groupCount; ++i) { - if (remove.inGroup(i)) { - (*translatedRemoves)[i].append( - QQuickChangeSet::Remove(remove.index[i], remove.count, remove.moveId)); - removed[i] -= remove.count; - } - } - - if (!remove.inCache()) - continue; - - if (movedItems && remove.isMove()) { - movedItems->insert(remove.moveId, m_cache.mid(remove.cacheIndex, remove.count)); - QList<QQuickVisualDataModelItem *>::iterator begin = m_cache.begin() + remove.cacheIndex; - QList<QQuickVisualDataModelItem *>::iterator end = begin + remove.count; - m_cache.erase(begin, end); - } else { - for (; cacheIndex < remove.cacheIndex + remove.count - removedCache; ++cacheIndex) { - QQuickVisualDataModelItem *cacheItem = m_cache.at(cacheIndex); - if (remove.inGroup(Compositor::Persisted) && cacheItem->objectRef == 0 && cacheItem->object) { - QObject *object = cacheItem->object; - cacheItem->destroyObject(); - if (QQuickPackage *package = qmlobject_cast<QQuickPackage *>(object)) - emitDestroyingPackage(package); - else if (QQuickItem *item = qmlobject_cast<QQuickItem *>(object)) - emitDestroyingItem(item); - cacheItem->scriptRef -= 1; - } - if (!cacheItem->isReferenced()) { - m_compositor.clearFlags(Compositor::Cache, cacheIndex, 1, Compositor::CacheFlag); - m_cache.removeAt(cacheIndex); - delete cacheItem; - --cacheIndex; - ++removedCache; - Q_ASSERT(m_cache.count() == m_compositor.count(Compositor::Cache)); - } else if (remove.groups() == cacheItem->groups) { - cacheItem->groups = 0; - if (QVDMIncubationTask *incubationTask = cacheItem->incubationTask) { - for (int i = 1; i < m_groupCount; ++i) - incubationTask->index[i] = -1; - } - if (QQuickVisualDataModelAttached *attached = cacheItem->attached) { - for (int i = 1; i < m_groupCount; ++i) - attached->m_currentIndex[i] = -1; - } - } else { - if (QVDMIncubationTask *incubationTask = cacheItem->incubationTask) { - for (int i = 1; i < m_groupCount; ++i) { - if (remove.inGroup(i)) - incubationTask->index[i] = remove.index[i]; - } - } - if (QQuickVisualDataModelAttached *attached = cacheItem->attached) { - for (int i = 1; i < m_groupCount; ++i) { - if (remove.inGroup(i)) - attached->m_currentIndex[i] = remove.index[i]; - } - } - cacheItem->groups &= ~remove.flags; - } - } - } - } - - for (; cacheIndex < m_cache.count(); ++cacheIndex) - incrementIndexes(m_cache.at(cacheIndex), m_groupCount, removed); -} - -void QQuickVisualDataModelPrivate::itemsRemoved(const QVector<Compositor::Remove> &removes) -{ - QVarLengthArray<QVector<QQuickChangeSet::Remove>, Compositor::MaximumGroupCount> translatedRemoves(m_groupCount); - itemsRemoved(removes, &translatedRemoves); - Q_ASSERT(m_cache.count() == m_compositor.count(Compositor::Cache)); - if (!m_delegate) - return; - - for (int i = 1; i < m_groupCount; ++i) - QQuickVisualDataGroupPrivate::get(m_groups[i])->changeSet.remove(translatedRemoves.at(i)); -} - -void QQuickVisualDataModel::_q_itemsRemoved(int index, int count) -{ - Q_D(QQuickVisualDataModel); - if (count <= 0|| !d->m_complete) - return; - - d->m_count -= count; - - for (int i = 0, c = d->m_cache.count(); i < c; ++i) { - QQuickVisualDataModelItem *item = d->m_cache.at(i); - if (item->modelIndex() >= index + count) - item->setModelIndex(item->modelIndex() - count); - else if (item->modelIndex() >= index) - item->setModelIndex(-1); - } - - QVector<Compositor::Remove> removes; - d->m_compositor.listItemsRemoved(&d->m_adaptorModel, index, count, &removes); - d->itemsRemoved(removes); - - d->emitChanges(); -} - -void QQuickVisualDataModelPrivate::itemsMoved( - const QVector<Compositor::Remove> &removes, const QVector<Compositor::Insert> &inserts) -{ - QHash<int, QList<QQuickVisualDataModelItem *> > movedItems; - - QVarLengthArray<QVector<QQuickChangeSet::Remove>, Compositor::MaximumGroupCount> translatedRemoves(m_groupCount); - itemsRemoved(removes, &translatedRemoves, &movedItems); - - QVarLengthArray<QVector<QQuickChangeSet::Insert>, Compositor::MaximumGroupCount> translatedInserts(m_groupCount); - itemsInserted(inserts, &translatedInserts, &movedItems); - Q_ASSERT(m_cache.count() == m_compositor.count(Compositor::Cache)); - Q_ASSERT(movedItems.isEmpty()); - if (!m_delegate) - return; - - for (int i = 1; i < m_groupCount; ++i) { - QQuickVisualDataGroupPrivate::get(m_groups[i])->changeSet.move( - translatedRemoves.at(i), - translatedInserts.at(i)); - } -} - -void QQuickVisualDataModel::_q_itemsMoved(int from, int to, int count) -{ - Q_D(QQuickVisualDataModel); - if (count <= 0 || !d->m_complete) - return; - - const int minimum = qMin(from, to); - const int maximum = qMax(from, to) + count; - const int difference = from > to ? count : -count; - - for (int i = 0, c = d->m_cache.count(); i < c; ++i) { - QQuickVisualDataModelItem *item = d->m_cache.at(i); - if (item->modelIndex() >= from && item->modelIndex() < from + count) - item->setModelIndex(item->modelIndex() - from + to); - else if (item->modelIndex() >= minimum && item->modelIndex() < maximum) - item->setModelIndex(item->modelIndex() + difference); - } - - QVector<Compositor::Remove> removes; - QVector<Compositor::Insert> inserts; - d->m_compositor.listItemsMoved(&d->m_adaptorModel, from, to, count, &removes, &inserts); - d->itemsMoved(removes, inserts); - d->emitChanges(); -} - -template <typename T> v8::Local<v8::Array> -QQuickVisualDataModelPrivate::buildChangeList(const QVector<T> &changes) -{ - v8::Local<v8::Array> indexes = v8::Array::New(changes.count()); - v8::Local<v8::String> indexKey = v8::String::New("index"); - v8::Local<v8::String> countKey = v8::String::New("count"); - v8::Local<v8::String> moveIdKey = v8::String::New("moveId"); - - for (int i = 0; i < changes.count(); ++i) { - v8::Local<v8::Object> object = v8::Object::New(); - object->Set(indexKey, v8::Integer::New(changes.at(i).index)); - object->Set(countKey, v8::Integer::New(changes.at(i).count)); - object->Set(moveIdKey, changes.at(i).moveId != -1 ? v8::Integer::New(changes.at(i).count) : v8::Undefined()); - indexes->Set(i, object); - } - return indexes; -} - -void QQuickVisualDataModelPrivate::emitModelUpdated(const QQuickChangeSet &changeSet, bool reset) -{ - Q_Q(QQuickVisualDataModel); - emit q->modelUpdated(changeSet, reset); - if (changeSet.difference() != 0) - emit q->countChanged(); -} - -void QQuickVisualDataModelPrivate::emitChanges() -{ - if (m_transaction || !m_complete || !m_context->isValid()) - return; - - m_transaction = true; - QV8Engine *engine = QQmlEnginePrivate::getV8Engine(m_context->engine()); - for (int i = 1; i < m_groupCount; ++i) - QQuickVisualDataGroupPrivate::get(m_groups[i])->emitChanges(engine); - m_transaction = false; - - const bool reset = m_reset; - m_reset = false; - for (int i = 1; i < m_groupCount; ++i) - QQuickVisualDataGroupPrivate::get(m_groups[i])->emitModelUpdated(reset); - - foreach (QQuickVisualDataModelItem *cacheItem, m_cache) { - if (cacheItem->attached) - cacheItem->attached->emitChanges(); - } -} - -void QQuickVisualDataModel::_q_modelReset() -{ - Q_D(QQuickVisualDataModel); - if (!d->m_delegate) - return; - - int oldCount = d->m_count; - d->m_adaptorModel.rootIndex = QModelIndex(); - - if (d->m_complete) { - d->m_count = d->m_adaptorModel.count(); - - for (int i = 0, c = d->m_cache.count(); i < c; ++i) { - QQuickVisualDataModelItem *item = d->m_cache.at(i); - if (item->modelIndex() != -1) - item->setModelIndex(-1); - } - - QVector<Compositor::Remove> removes; - QVector<Compositor::Insert> inserts; - if (oldCount) - d->m_compositor.listItemsRemoved(&d->m_adaptorModel, 0, oldCount, &removes); - if (d->m_count) - d->m_compositor.listItemsInserted(&d->m_adaptorModel, 0, d->m_count, &inserts); - d->itemsMoved(removes, inserts); - d->m_reset = true; - - if (d->m_adaptorModel.canFetchMore()) - d->m_adaptorModel.fetchMore(); - - d->emitChanges(); - } - emit rootIndexChanged(); -} - -void QQuickVisualDataModel::_q_rowsInserted(const QModelIndex &parent, int begin, int end) -{ - Q_D(QQuickVisualDataModel); - if (parent == d->m_adaptorModel.rootIndex) - _q_itemsInserted(begin, end - begin + 1); -} - -void QQuickVisualDataModel::_q_rowsAboutToBeRemoved(const QModelIndex &parent, int begin, int end) -{ - Q_D(QQuickVisualDataModel); - if (!d->m_adaptorModel.rootIndex.isValid()) - return; - const QModelIndex index = d->m_adaptorModel.rootIndex; - if (index.parent() == parent && index.row() >= begin && index.row() <= end) { - const int oldCount = d->m_count; - d->m_count = 0; - d->m_adaptorModel.invalidateModel(this); - - if (d->m_complete && oldCount > 0) { - QVector<Compositor::Remove> removes; - d->m_compositor.listItemsRemoved(&d->m_adaptorModel, 0, oldCount, &removes); - d->itemsRemoved(removes); - d->emitChanges(); - } - } -} - -void QQuickVisualDataModel::_q_rowsRemoved(const QModelIndex &parent, int begin, int end) -{ - Q_D(QQuickVisualDataModel); - if (parent == d->m_adaptorModel.rootIndex) - _q_itemsRemoved(begin, end - begin + 1); -} - -void QQuickVisualDataModel::_q_rowsMoved( - const QModelIndex &sourceParent, int sourceStart, int sourceEnd, - const QModelIndex &destinationParent, int destinationRow) -{ - Q_D(QQuickVisualDataModel); - const int count = sourceEnd - sourceStart + 1; - if (destinationParent == d->m_adaptorModel.rootIndex && sourceParent == d->m_adaptorModel.rootIndex) { - _q_itemsMoved(sourceStart, sourceStart > destinationRow ? destinationRow : destinationRow - count, count); - } else if (sourceParent == d->m_adaptorModel.rootIndex) { - _q_itemsRemoved(sourceStart, count); - } else if (destinationParent == d->m_adaptorModel.rootIndex) { - _q_itemsInserted(destinationRow, count); - } -} - -void QQuickVisualDataModel::_q_dataChanged(const QModelIndex &begin, const QModelIndex &end, const QVector<int> &roles) -{ - Q_D(QQuickVisualDataModel); - if (begin.parent() == d->m_adaptorModel.rootIndex) - _q_itemsChanged(begin.row(), end.row() - begin.row() + 1, roles); -} - -void QQuickVisualDataModel::_q_layoutChanged() -{ - Q_D(QQuickVisualDataModel); - _q_itemsChanged(0, d->m_count, QVector<int>()); -} - -QQuickVisualDataModelAttached *QQuickVisualDataModel::qmlAttachedProperties(QObject *obj) -{ - if (QQuickVisualDataModelItem *cacheItem = QQuickVisualDataModelItem::dataForObject(obj)) { - if (cacheItem->object == obj) { // Don't create attached item for child objects. - cacheItem->attached = new QQuickVisualDataModelAttached(cacheItem, obj); - return cacheItem->attached; - } - } - return new QQuickVisualDataModelAttached(obj); -} - -bool QQuickVisualDataModelPrivate::insert( - Compositor::insert_iterator &before, const v8::Local<v8::Object> &object, int groups) -{ - if (!m_context->isValid()) - return false; - - QQuickVisualDataModelItem *cacheItem = m_adaptorModel.createItem(m_cacheMetaType, m_context->engine(), -1); - if (!cacheItem) - return false; - - v8::Local<v8::Array> propertyNames = object->GetPropertyNames(); - for (uint i = 0; i < propertyNames->Length(); ++i) { - v8::Local<v8::String> propertyName = propertyNames->Get(i)->ToString(); - cacheItem->setValue( - m_cacheMetaType->v8Engine->toString(propertyName), - m_cacheMetaType->v8Engine->toVariant(object->Get(propertyName), QVariant::Invalid)); - } - - cacheItem->groups = groups | Compositor::UnresolvedFlag | Compositor::CacheFlag; - - // Must be before the new object is inserted into the cache or its indexes will be adjusted too. - itemsInserted(QVector<Compositor::Insert>() << Compositor::Insert(before, 1, cacheItem->groups & ~Compositor::CacheFlag)); - - before = m_compositor.insert(before, 0, 0, 1, cacheItem->groups); - m_cache.insert(before.cacheIndex, cacheItem); - - return true; -} - -//============================================================================ - -QQuickVisualDataModelItemMetaType::QQuickVisualDataModelItemMetaType( - QV8Engine *engine, QQuickVisualDataModel *model, const QStringList &groupNames) - : model(model) - , groupCount(groupNames.count() + 1) - , v8Engine(engine) - , metaObject(0) - , groupNames(groupNames) -{ -} - -QQuickVisualDataModelItemMetaType::~QQuickVisualDataModelItemMetaType() -{ - if (metaObject) - metaObject->release(); - qPersistentDispose(constructor); -} - -void QQuickVisualDataModelItemMetaType::initializeMetaObject() -{ - QMetaObjectBuilder builder; - builder.setFlags(QMetaObjectBuilder::DynamicMetaObject); - builder.setClassName(QQuickVisualDataModelAttached::staticMetaObject.className()); - builder.setSuperClass(&QQuickVisualDataModelAttached::staticMetaObject); - - int notifierId = 0; - for (int i = 0; i < groupNames.count(); ++i, ++notifierId) { - QString propertyName = QStringLiteral("in") + groupNames.at(i); - propertyName.replace(2, 1, propertyName.at(2).toUpper()); - builder.addSignal("__" + propertyName.toUtf8() + "Changed()"); - QMetaPropertyBuilder propertyBuilder = builder.addProperty( - propertyName.toUtf8(), "bool", notifierId); - propertyBuilder.setWritable(true); - } - for (int i = 0; i < groupNames.count(); ++i, ++notifierId) { - const QString propertyName = groupNames.at(i) + QStringLiteral("Index"); - builder.addSignal("__" + propertyName.toUtf8() + "Changed()"); - QMetaPropertyBuilder propertyBuilder = builder.addProperty( - propertyName.toUtf8(), "int", notifierId); - propertyBuilder.setWritable(true); - } - - metaObject = new QQuickVisualDataModelAttachedMetaObject(this, builder.toMetaObject()); -} - -void QQuickVisualDataModelItemMetaType::initializeConstructor() -{ - v8::HandleScope handleScope; - v8::Context::Scope contextScope(v8Engine->context()); - - QQuickVisualDataModelEngineData *data = engineData(v8Engine); - - constructor = qPersistentNew(v8::ObjectTemplate::New()); - - constructor->SetHasExternalResource(true); - constructor->SetAccessor(data->model(), get_model); - constructor->SetAccessor(data->groups(), get_groups, set_groups); - constructor->SetAccessor(data->isUnresolved(), get_member, 0, v8::Int32::New(30)); - constructor->SetAccessor(data->inItems(), get_member, set_member, v8::Int32::New(1)); - constructor->SetAccessor(data->inPersistedItems(), get_member, set_member, v8::Int32::New(2)); - constructor->SetAccessor(data->itemsIndex(), get_index, 0, v8::Int32::New(1)); - constructor->SetAccessor(data->persistedItemsIndex(), get_index, 0, v8::Int32::New(2)); - - for (int i = 2; i < groupNames.count(); ++i) { - QString propertyName = QStringLiteral("in") + groupNames.at(i); - propertyName.replace(2, 1, propertyName.at(2).toUpper()); - constructor->SetAccessor( - v8Engine->toString(propertyName), get_member, set_member, v8::Int32::New(i + 1)); - } - for (int i = 2; i < groupNames.count(); ++i) { - const QString propertyName = groupNames.at(i) + QStringLiteral("Index"); - constructor->SetAccessor( - v8Engine->toString(propertyName), get_index, 0, v8::Int32::New(i + 1)); - } -} - -int QQuickVisualDataModelItemMetaType::parseGroups(const QStringList &groups) const -{ - int groupFlags = 0; - foreach (const QString &groupName, groups) { - int index = groupNames.indexOf(groupName); - if (index != -1) - groupFlags |= 2 << index; - } - return groupFlags; -} - -int QQuickVisualDataModelItemMetaType::parseGroups(const v8::Local<v8::Value> &groups) const -{ - int groupFlags = 0; - if (groups->IsString()) { - const QString groupName = v8Engine->toString(groups); - int index = groupNames.indexOf(groupName); - if (index != -1) - groupFlags |= 2 << index; - } else if (groups->IsArray()) { - v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(groups); - for (uint i = 0; i < array->Length(); ++i) { - const QString groupName = v8Engine->toString(array->Get(i)); - int index = groupNames.indexOf(groupName); - if (index != -1) - groupFlags |= 2 << index; - } - } - return groupFlags; -} - -v8::Handle<v8::Value> QQuickVisualDataModelItemMetaType::get_model( - v8::Local<v8::String>, const v8::AccessorInfo &info) -{ - QQuickVisualDataModelItem *cacheItem = v8_resource_cast<QQuickVisualDataModelItem>(info.This()); - V8ASSERT_TYPE(cacheItem, "Not a valid VisualData object"); - if (!cacheItem->metaType->model) - return v8::Undefined(); - - return cacheItem->get(); -} - -v8::Handle<v8::Value> QQuickVisualDataModelItemMetaType::get_groups( - v8::Local<v8::String>, const v8::AccessorInfo &info) -{ - QQuickVisualDataModelItem *cacheItem = v8_resource_cast<QQuickVisualDataModelItem>(info.This()); - V8ASSERT_TYPE(cacheItem, "Not a valid VisualData object"); - - QStringList groups; - for (int i = 1; i < cacheItem->metaType->groupCount; ++i) { - if (cacheItem->groups & (1 << i)) - groups.append(cacheItem->metaType->groupNames.at(i - 1)); - } - - return cacheItem->engine->fromVariant(groups); -} - -void QQuickVisualDataModelItemMetaType::set_groups( - v8::Local<v8::String>, v8::Local<v8::Value> value, const v8::AccessorInfo &info) -{ - QQuickVisualDataModelItem *cacheItem = v8_resource_cast<QQuickVisualDataModelItem>(info.This()); - V8ASSERT_TYPE_SETTER(cacheItem, "Not a valid VisualData object"); - - if (!cacheItem->metaType->model) - return; - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(cacheItem->metaType->model); - - const int groupFlags = model->m_cacheMetaType->parseGroups(value); - const int cacheIndex = model->m_cache.indexOf(cacheItem); - Compositor::iterator it = model->m_compositor.find(Compositor::Cache, cacheIndex); - model->setGroups(it, 1, Compositor::Cache, groupFlags); -} - -v8::Handle<v8::Value> QQuickVisualDataModelItemMetaType::get_member( - v8::Local<v8::String>, const v8::AccessorInfo &info) -{ - QQuickVisualDataModelItem *cacheItem = v8_resource_cast<QQuickVisualDataModelItem>(info.This()); - V8ASSERT_TYPE(cacheItem, "Not a valid VisualData object"); - - return v8::Boolean::New(cacheItem->groups & (1 << info.Data()->Int32Value())); -} - -void QQuickVisualDataModelItemMetaType::set_member( - v8::Local<v8::String>, v8::Local<v8::Value> value, const v8::AccessorInfo &info) -{ - QQuickVisualDataModelItem *cacheItem = v8_resource_cast<QQuickVisualDataModelItem>(info.This()); - V8ASSERT_TYPE_SETTER(cacheItem, "Not a valid VisualData object"); - - if (!cacheItem->metaType->model) - return; - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(cacheItem->metaType->model); - - Compositor::Group group = Compositor::Group(info.Data()->Int32Value()); - const bool member = value->BooleanValue(); - const int groupFlag = (1 << group); - if (member == ((cacheItem->groups & groupFlag) != 0)) - return; - - const int cacheIndex = model->m_cache.indexOf(cacheItem); - Compositor::iterator it = model->m_compositor.find(Compositor::Cache, cacheIndex); - if (member) - model->addGroups(it, 1, Compositor::Cache, groupFlag); - else - model->removeGroups(it, 1, Compositor::Cache, groupFlag); -} - -v8::Handle<v8::Value> QQuickVisualDataModelItemMetaType::get_index( - v8::Local<v8::String>, const v8::AccessorInfo &info) -{ - QQuickVisualDataModelItem *cacheItem = v8_resource_cast<QQuickVisualDataModelItem>(info.This()); - V8ASSERT_TYPE(cacheItem, "Not a valid VisualData object"); - - return v8::Integer::New(cacheItem->groupIndex(Compositor::Group(info.Data()->Int32Value()))); -} - - -//--------------------------------------------------------------------------- - -QQuickVisualDataModelItem::QQuickVisualDataModelItem( - QQuickVisualDataModelItemMetaType *metaType, int modelIndex) - : QV8ObjectResource(metaType->v8Engine) - , metaType(metaType) - , contextData(0) - , object(0) - , attached(0) - , incubationTask(0) - , objectRef(0) - , scriptRef(0) - , groups(0) - , index(modelIndex) -{ - metaType->addref(); -} - -QQuickVisualDataModelItem::~QQuickVisualDataModelItem() -{ - Q_ASSERT(scriptRef == 0); - Q_ASSERT(objectRef == 0); - Q_ASSERT(!object); - - if (incubationTask && metaType->model) - QQuickVisualDataModelPrivate::get(metaType->model)->releaseIncubator(incubationTask); - - metaType->release(); - -} - -void QQuickVisualDataModelItem::Dispose() -{ - --scriptRef; - if (isReferenced()) - return; - - if (metaType->model) { - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(metaType->model); - model->removeCacheItem(this); - } - delete this; -} - -/* - This is essentially a copy of QQmlComponent::create(); except it takes the QQmlContextData - arguments instead of QQmlContext which means we don't have to construct the rather weighty - wrapper class for every delegate item. -*/ -void QQuickVisualDataModelItem::incubateObject( - QQmlComponent *component, - QQmlEngine *engine, - QQmlContextData *context, - QQmlContextData *forContext) -{ - QQmlIncubatorPrivate *incubatorPriv = QQmlIncubatorPrivate::get(incubationTask); - QQmlEnginePrivate *enginePriv = QQmlEnginePrivate::get(engine); - QQmlComponentPrivate *componentPriv = QQmlComponentPrivate::get(component); - - incubatorPriv->compiledData = componentPriv->cc; - incubatorPriv->compiledData->addref(); - incubatorPriv->vme.init( - context, - componentPriv->cc, - componentPriv->start, - componentPriv->creationContext); - - enginePriv->incubate(*incubationTask, forContext); -} - -void QQuickVisualDataModelItem::destroyObject() -{ - Q_ASSERT(object); - Q_ASSERT(contextData); - - QObjectPrivate *p = QObjectPrivate::get(object); - Q_ASSERT(p->declarativeData); - QQmlData *data = static_cast<QQmlData*>(p->declarativeData); - if (data->ownContext && data->context) - data->context->clearContext(); - object->deleteLater(); - - if (attached) { - attached->m_cacheItem = 0; - attached = 0; - } - - contextData->destroy(); - contextData = 0; - object = 0; -} - -QQuickVisualDataModelItem *QQuickVisualDataModelItem::dataForObject(QObject *object) -{ - QObjectPrivate *p = QObjectPrivate::get(object); - QQmlContextData *context = p->declarativeData - ? static_cast<QQmlData *>(p->declarativeData)->context - : 0; - for (context = context ? context->parent : 0; context; context = context->parent) { - if (QQuickVisualDataModelItem *cacheItem = qobject_cast<QQuickVisualDataModelItem *>( - context->contextObject)) { - return cacheItem; - } - } - return 0; -} - -int QQuickVisualDataModelItem::groupIndex(Compositor::Group group) -{ - if (QQuickVisualDataModelPrivate * const model = metaType->model - ? QQuickVisualDataModelPrivate::get(metaType->model) - : 0) { - return model->m_compositor.find(Compositor::Cache, model->m_cache.indexOf(this)).index[group]; - } - return -1; -} - -//--------------------------------------------------------------------------- - -QQuickVisualDataModelAttachedMetaObject::QQuickVisualDataModelAttachedMetaObject( - QQuickVisualDataModelItemMetaType *metaType, QMetaObject *metaObject) - : metaType(metaType) - , metaObject(metaObject) - , memberPropertyOffset(QQuickVisualDataModelAttached::staticMetaObject.propertyCount()) - , indexPropertyOffset(QQuickVisualDataModelAttached::staticMetaObject.propertyCount() + metaType->groupNames.count()) -{ - // Don't reference count the meta-type here as that would create a circular reference. - // Instead we rely the fact that the meta-type's reference count can't reach 0 without first - // destroying all delegates with attached objects. - *static_cast<QMetaObject *>(this) = *metaObject; -} - -QQuickVisualDataModelAttachedMetaObject::~QQuickVisualDataModelAttachedMetaObject() -{ - ::free(metaObject); -} - -void QQuickVisualDataModelAttachedMetaObject::objectDestroyed(QObject *) -{ - release(); -} - -int QQuickVisualDataModelAttachedMetaObject::metaCall(QObject *object, QMetaObject::Call call, int _id, void **arguments) -{ - QQuickVisualDataModelAttached *attached = static_cast<QQuickVisualDataModelAttached *>(object); - if (call == QMetaObject::ReadProperty) { - if (_id >= indexPropertyOffset) { - Compositor::Group group = Compositor::Group(_id - indexPropertyOffset + 1); - *static_cast<int *>(arguments[0]) = attached->m_currentIndex[group]; - return -1; - } else if (_id >= memberPropertyOffset) { - Compositor::Group group = Compositor::Group(_id - memberPropertyOffset + 1); - *static_cast<bool *>(arguments[0]) = attached->m_cacheItem->groups & (1 << group); - return -1; - } - } else if (call == QMetaObject::WriteProperty) { - if (_id >= memberPropertyOffset) { - if (!metaType->model) - return -1; - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(metaType->model); - Compositor::Group group = Compositor::Group(_id - memberPropertyOffset + 1); - const int groupFlag = 1 << group; - const bool member = attached->m_cacheItem->groups & groupFlag; - if (member && !*static_cast<bool *>(arguments[0])) { - Compositor::iterator it = model->m_compositor.find( - group, attached->m_currentIndex[group]); - model->removeGroups(it, 1, group, groupFlag); - } else if (!member && *static_cast<bool *>(arguments[0])) { - for (int i = 1; i < metaType->groupCount; ++i) { - if (attached->m_cacheItem->groups & (1 << i)) { - Compositor::iterator it = model->m_compositor.find( - Compositor::Group(i), attached->m_currentIndex[i]); - model->addGroups(it, 1, Compositor::Group(i), groupFlag); - break; - } - } - } - return -1; - } - } - return attached->qt_metacall(call, _id, arguments); -} - -QQuickVisualDataModelAttached::QQuickVisualDataModelAttached(QObject *parent) - : m_cacheItem(0) - , m_previousGroups(0) -{ - QQml_setParent_noEvent(this, parent); -} - -QQuickVisualDataModelAttached::QQuickVisualDataModelAttached( - QQuickVisualDataModelItem *cacheItem, QObject *parent) - : m_cacheItem(cacheItem) - , m_previousGroups(cacheItem->groups) -{ - QQml_setParent_noEvent(this, parent); - if (QVDMIncubationTask *incubationTask = m_cacheItem->incubationTask) { - for (int i = 1; i < m_cacheItem->metaType->groupCount; ++i) - m_currentIndex[i] = m_previousIndex[i] = incubationTask->index[i]; - } else { - QQuickVisualDataModelPrivate * const model = QQuickVisualDataModelPrivate::get(m_cacheItem->metaType->model); - Compositor::iterator it = model->m_compositor.find( - Compositor::Cache, model->m_cache.indexOf(m_cacheItem)); - for (int i = 1; i < m_cacheItem->metaType->groupCount; ++i) - m_currentIndex[i] = m_previousIndex[i] = it.index[i]; - } - - if (!cacheItem->metaType->metaObject) - cacheItem->metaType->initializeMetaObject(); - - QObjectPrivate::get(this)->metaObject = cacheItem->metaType->metaObject; - cacheItem->metaType->metaObject->addref(); -} - -/*! - \qmlattachedproperty int QtQuick2::VisualDataModel::model - - This attached property holds the visual data model this delegate instance belongs to. - - It is attached to each instance of the delegate. -*/ - -QQuickVisualDataModel *QQuickVisualDataModelAttached::model() const -{ - return m_cacheItem ? m_cacheItem->metaType->model : 0; -} - -/*! - \qmlattachedproperty stringlist QtQuick2::VisualDataModel::groups - - This attached property holds the name of VisualDataGroups the item belongs to. - - It is attached to each instance of the delegate. -*/ - -QStringList QQuickVisualDataModelAttached::groups() const -{ - QStringList groups; - - if (!m_cacheItem) - return groups; - for (int i = 1; i < m_cacheItem->metaType->groupCount; ++i) { - if (m_cacheItem->groups & (1 << i)) - groups.append(m_cacheItem->metaType->groupNames.at(i - 1)); - } - return groups; -} - -void QQuickVisualDataModelAttached::setGroups(const QStringList &groups) -{ - if (!m_cacheItem) - return; - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(m_cacheItem->metaType->model); - - const int groupFlags = model->m_cacheMetaType->parseGroups(groups); - const int cacheIndex = model->m_cache.indexOf(m_cacheItem); - Compositor::iterator it = model->m_compositor.find(Compositor::Cache, cacheIndex); - model->setGroups(it, 1, Compositor::Cache, groupFlags); -} - -/*! - \qmlattachedproperty bool QtQuick2::VisualDataModel::isUnresolved - - This attached property holds whether the visual item is bound to a data model index. - Returns true if the item is not bound to the model, and false if it is. - - An unresolved item can be bound to the data model using the VisualDataGroup::resolve() - function. - - It is attached to each instance of the delegate. -*/ - -bool QQuickVisualDataModelAttached::isUnresolved() const -{ - if (!m_cacheItem) - return false; - - return m_cacheItem->groups & Compositor::UnresolvedFlag; -} - -/*! - \qmlattachedproperty int QtQuick2::VisualDataModel::inItems - - This attached property holds whether the item belongs to the default \l items VisualDataGroup. - - Changing this property will add or remove the item from the items group. - - It is attached to each instance of the delegate. -*/ - -/*! - \qmlattachedproperty int QtQuick2::VisualDataModel::itemsIndex - - This attached property holds the index of the item in the default \l items VisualDataGroup. - - It is attached to each instance of the delegate. -*/ - -/*! - \qmlattachedproperty int QtQuick2::VisualDataModel::inPersistedItems - - This attached property holds whether the item belongs to the \l persistedItems VisualDataGroup. - - Changing this property will add or remove the item from the items group. Change with caution - as removing an item from the persistedItems group will destroy the current instance if it is - not referenced by a model. - - It is attached to each instance of the delegate. -*/ - -/*! - \qmlattachedproperty int QtQuick2::VisualDataModel::persistedItemsIndex - - This attached property holds the index of the item in the \l persistedItems VisualDataGroup. - - It is attached to each instance of the delegate. -*/ - -void QQuickVisualDataModelAttached::emitChanges() -{ - const int groupChanges = m_previousGroups ^ m_cacheItem->groups; - m_previousGroups = m_cacheItem->groups; - - int indexChanges = 0; - for (int i = 1; i < m_cacheItem->metaType->groupCount; ++i) { - if (m_previousIndex[i] != m_currentIndex[i]) { - m_previousIndex[i] = m_currentIndex[i]; - indexChanges |= (1 << i); - } - } - - int notifierId = 0; - const QMetaObject *meta = metaObject(); - for (int i = 1; i < m_cacheItem->metaType->groupCount; ++i, ++notifierId) { - if (groupChanges & (1 << i)) - QMetaObject::activate(this, meta, notifierId, 0); - } - for (int i = 1; i < m_cacheItem->metaType->groupCount; ++i, ++notifierId) { - if (indexChanges & (1 << i)) - QMetaObject::activate(this, meta, notifierId, 0); - } - - if (groupChanges) - emit groupsChanged(); -} - -//============================================================================ - -void QQuickVisualDataGroupPrivate::setModel(QQuickVisualDataModel *m, Compositor::Group g) -{ - Q_ASSERT(!model); - model = m; - group = g; -} - -bool QQuickVisualDataGroupPrivate::isChangedConnected() -{ - Q_Q(QQuickVisualDataGroup); - IS_SIGNAL_CONNECTED(q, QQuickVisualDataGroup, changed, (const QQmlV8Handle &,const QQmlV8Handle &)); -} - -void QQuickVisualDataGroupPrivate::emitChanges(QV8Engine *engine) -{ - Q_Q(QQuickVisualDataGroup); - if (isChangedConnected() && !changeSet.isEmpty()) { - v8::HandleScope handleScope; - v8::Context::Scope contextScope(engine->context()); - v8::Local<v8::Object> removed = engineData(engine)->array(engine, changeSet.removes()); - v8::Local<v8::Object> inserted = engineData(engine)->array(engine, changeSet.inserts()); - emit q->changed(QQmlV8Handle::fromHandle(removed), QQmlV8Handle::fromHandle(inserted)); - } - if (changeSet.difference() != 0) - emit q->countChanged(); -} - -void QQuickVisualDataGroupPrivate::emitModelUpdated(bool reset) -{ - for (QQuickVisualDataGroupEmitterList::iterator it = emitters.begin(); it != emitters.end(); ++it) - it->emitModelUpdated(changeSet, reset); - changeSet.clear(); -} - -void QQuickVisualDataGroupPrivate::createdPackage(int index, QQuickPackage *package) -{ - for (QQuickVisualDataGroupEmitterList::iterator it = emitters.begin(); it != emitters.end(); ++it) - it->createdPackage(index, package); -} - -void QQuickVisualDataGroupPrivate::initPackage(int index, QQuickPackage *package) -{ - for (QQuickVisualDataGroupEmitterList::iterator it = emitters.begin(); it != emitters.end(); ++it) - it->initPackage(index, package); -} - -void QQuickVisualDataGroupPrivate::destroyingPackage(QQuickPackage *package) -{ - for (QQuickVisualDataGroupEmitterList::iterator it = emitters.begin(); it != emitters.end(); ++it) - it->destroyingPackage(package); -} - -/*! - \qmltype VisualDataGroup - \instantiates QQuickVisualDataGroup - \inqmlmodule QtQuick 2 - \ingroup qtquick-models - \brief Encapsulates a filtered set of visual data items - - The VisualDataGroup type provides a means to address the model data of a VisualDataModel's - delegate items, as well as sort and filter these delegate items. - - The initial set of instantiable delegate items in a VisualDataModel is represented - by its \l {QtQuick2::VisualDataModel::items}{items} group, which normally directly reflects - the contents of the model assigned to VisualDataModel::model. This set can be changed to - the contents of any other member of VisualDataModel::groups by assigning the \l name of that - VisualDataGroup to the VisualDataModel::filterOnGroup property. - - The data of an item in a VisualDataGroup can be accessed using the get() function, which returns - information about group membership and indexes as well as model data. In combination - with the move() function this can be used to implement view sorting, with remove() to filter - items out of a view, or with setGroups() and \l Package delegates to categorize items into - different views. - - Data from models can be supplemented by inserting data directly into a VisualDataGroup - with the insert() function. This can be used to introduce mock items into a view, or - placeholder items that are later \l {resolve()}{resolved} to real model data when it becomes - available. - - Delegate items can also be be instantiated directly from a VisualDataGroup using the - create() function, making it possible to use VisualDataModel without an accompanying view - type or to cherry-pick specific items that should be instantiated irregardless of whether - they're currently within a view's visible area. - - \sa {QML Dynamic View Ordering Tutorial} -*/ - -QQuickVisualDataGroup::QQuickVisualDataGroup(QObject *parent) - : QObject(*new QQuickVisualDataGroupPrivate, parent) -{ -} - -QQuickVisualDataGroup::QQuickVisualDataGroup( - const QString &name, QQuickVisualDataModel *model, int index, QObject *parent) - : QObject(*new QQuickVisualDataGroupPrivate, parent) -{ - Q_D(QQuickVisualDataGroup); - d->name = name; - d->setModel(model, Compositor::Group(index)); -} - -QQuickVisualDataGroup::~QQuickVisualDataGroup() -{ -} - -/*! - \qmlproperty string QtQuick2::VisualDataGroup::name - - This property holds the name of the group. - - Each group in a model must have a unique name starting with a lower case letter. -*/ - -QString QQuickVisualDataGroup::name() const -{ - Q_D(const QQuickVisualDataGroup); - return d->name; -} - -void QQuickVisualDataGroup::setName(const QString &name) -{ - Q_D(QQuickVisualDataGroup); - if (d->model) - return; - if (d->name != name) { - d->name = name; - emit nameChanged(); - } -} - -/*! - \qmlproperty int QtQuick2::VisualDataGroup::count - - This property holds the number of items in the group. -*/ - -int QQuickVisualDataGroup::count() const -{ - Q_D(const QQuickVisualDataGroup); - if (!d->model) - return 0; - return QQuickVisualDataModelPrivate::get(d->model)->m_compositor.count(d->group); -} - -/*! - \qmlproperty bool QtQuick2::VisualDataGroup::includeByDefault - - This property holds whether new items are assigned to this group by default. -*/ - -bool QQuickVisualDataGroup::defaultInclude() const -{ - Q_D(const QQuickVisualDataGroup); - return d->defaultInclude; -} - -void QQuickVisualDataGroup::setDefaultInclude(bool include) -{ - Q_D(QQuickVisualDataGroup); - if (d->defaultInclude != include) { - d->defaultInclude = include; - - if (d->model) { - if (include) - QQuickVisualDataModelPrivate::get(d->model)->m_compositor.setDefaultGroup(d->group); - else - QQuickVisualDataModelPrivate::get(d->model)->m_compositor.clearDefaultGroup(d->group); - } - emit defaultIncludeChanged(); - } -} - -/*! - \qmlmethod object QtQuick2::VisualDataGroup::get(int index) - - Returns a javascript object describing the item at \a index in the group. - - The returned object contains the same information that is available to a delegate from the - VisualDataModel attached as well as the model for that item. It has the properties: - - \list - \li \b model The model data of the item. This is the same as the model context property in - a delegate - \li \b groups A list the of names of groups the item is a member of. This property can be - written to change the item's membership. - \li \b inItems Whether the item belongs to the \l {QtQuick2::VisualDataModel::items}{items} group. - Writing to this property will add or remove the item from the group. - \li \b itemsIndex The index of the item within the \l {QtQuick2::VisualDataModel::items}{items} group. - \li \b {in<GroupName>} Whether the item belongs to the dynamic group \e groupName. Writing to - this property will add or remove the item from the group. - \li \b {<groupName>Index} The index of the item within the dynamic group \e groupName. - \li \b isUnresolved Whether the item is bound to an index in the model assigned to - VisualDataModel::model. Returns true if the item is not bound to the model, and false if it is. - \endlist -*/ - -QQmlV8Handle QQuickVisualDataGroup::get(int index) -{ - Q_D(QQuickVisualDataGroup); - if (!d->model) - return QQmlV8Handle::fromHandle(v8::Undefined());; - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - if (!model->m_context->isValid()) { - return QQmlV8Handle::fromHandle(v8::Undefined()); - } else if (index < 0 || index >= model->m_compositor.count(d->group)) { - qmlInfo(this) << tr("get: index out of range"); - return QQmlV8Handle::fromHandle(v8::Undefined()); - } - - Compositor::iterator it = model->m_compositor.find(d->group, index); - QQuickVisualDataModelItem *cacheItem = it->inCache() - ? model->m_cache.at(it.cacheIndex) - : 0; - - if (!cacheItem) { - cacheItem = model->m_adaptorModel.createItem( - model->m_cacheMetaType, model->m_context->engine(), it.modelIndex()); - if (!cacheItem) - return QQmlV8Handle::fromHandle(v8::Undefined()); - cacheItem->groups = it->flags; - - model->m_cache.insert(it.cacheIndex, cacheItem); - model->m_compositor.setFlags(it, 1, Compositor::CacheFlag); - } - - if (model->m_cacheMetaType->constructor.IsEmpty()) - model->m_cacheMetaType->initializeConstructor(); - v8::Local<v8::Object> handle = model->m_cacheMetaType->constructor->NewInstance(); - handle->SetExternalResource(cacheItem); - ++cacheItem->scriptRef; - - return QQmlV8Handle::fromHandle(handle); -} - -bool QQuickVisualDataGroupPrivate::parseIndex( - const v8::Local<v8::Value> &value, int *index, Compositor::Group *group) const -{ - if (value->IsInt32()) { - *index = value->Int32Value(); - return true; - } else if (value->IsObject()) { - v8::Local<v8::Object> object = value->ToObject(); - QQuickVisualDataModelItem * const cacheItem = v8_resource_cast<QQuickVisualDataModelItem>(object); - if (QQuickVisualDataModelPrivate *model = cacheItem && cacheItem->metaType->model - ? QQuickVisualDataModelPrivate::get(cacheItem->metaType->model) - : 0) { - *index = model->m_cache.indexOf(cacheItem); - *group = Compositor::Cache; - return true; - } - } - return false; -} - -/*! - \qmlmethod QtQuick2::VisualDataGroup::insert(int index, jsdict data, array groups = undefined) - \qmlmethod QtQuick2::VisualDataGroup::insert(jsdict data, var groups = undefined) - - Creates a new entry at \a index in a VisualDataModel with the values from \a data that - correspond to roles in the model assigned to VisualDataModel::model. - - If no index is supplied the data is appended to the model. - - The optional \a groups parameter identifies the groups the new entry should belong to, - if unspecified this is equal to the group insert was called on. - - Data inserted into a VisualDataModel can later be merged with an existing entry in - VisualDataModel::model using the \l resolve() function. This can be used to create placeholder - items that are later replaced by actual data. -*/ - -void QQuickVisualDataGroup::insert(QQmlV8Function *args) -{ - Q_D(QQuickVisualDataGroup); - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - - int index = model->m_compositor.count(d->group); - Compositor::Group group = d->group; - - if (args->Length() == 0) - return; - - int i = 0; - v8::Local<v8::Value> v = (*args)[i]; - if (d->parseIndex(v, &index, &group)) { - if (index < 0 || index > model->m_compositor.count(group)) { - qmlInfo(this) << tr("insert: index out of range"); - return; - } - if (++i == args->Length()) - return; - v = (*args)[i]; - } - - Compositor::insert_iterator before = index < model->m_compositor.count(group) - ? model->m_compositor.findInsertPosition(group, index) - : model->m_compositor.end(); - - int groups = 1 << d->group; - if (++i < args->Length()) - groups |= model->m_cacheMetaType->parseGroups((*args)[i]); - - if (v->IsArray()) { - return; - } else if (v->IsObject()) { - model->insert(before, v->ToObject(), groups); - model->emitChanges(); - } -} - -/*! - \qmlmethod QtQuick2::VisualDataGroup::create(int index) - \qmlmethod QtQuick2::VisualDataGroup::create(int index, jsdict data, array groups = undefined) - \qmlmethod QtQuick2::VisualDataGroup::create(jsdict data, array groups = undefined) - - Returns a reference to the instantiated item at \a index in the group. - - If a \a data object is provided it will be \l {insert}{inserted} at \a index and an item - referencing this new entry will be returned. The optional \a groups parameter identifies - the groups the new entry should belong to, if unspecified this is equal to the group create() - was called on. - - All items returned by create are added to the - \l {QtQuick2::VisualDataModel::persistedItems}{persistedItems} group. Items in this - group remain instantiated when not referenced by any view. -*/ - -void QQuickVisualDataGroup::create(QQmlV8Function *args) -{ - Q_D(QQuickVisualDataGroup); - if (!d->model) - return; - - if (args->Length() == 0) - return; - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - - int index = model->m_compositor.count(d->group); - Compositor::Group group = d->group; - - int i = 0; - v8::Local<v8::Value> v = (*args)[i]; - if (d->parseIndex(v, &index, &group)) - ++i; - - if (i < args->Length() && index >= 0 && index <= model->m_compositor.count(group)) { - v = (*args)[i]; - if (v->IsObject()) { - int groups = 1 << d->group; - if (++i < args->Length()) - groups |= model->m_cacheMetaType->parseGroups((*args)[i]); - - Compositor::insert_iterator before = index < model->m_compositor.count(group) - ? model->m_compositor.findInsertPosition(group, index) - : model->m_compositor.end(); - - index = before.index[d->group]; - group = d->group; - - if (!model->insert(before, v->ToObject(), groups)) { - return; - } - } - } - if (index < 0 || index >= model->m_compositor.count(group)) { - qmlInfo(this) << tr("create: index out of range"); - return; - } - - QObject *object = model->object(group, index, false); - if (object) { - QVector<Compositor::Insert> inserts; - Compositor::iterator it = model->m_compositor.find(group, index); - model->m_compositor.setFlags(it, 1, d->group, Compositor::PersistedFlag, &inserts); - model->itemsInserted(inserts); - model->m_cache.at(it.cacheIndex)->releaseObject(); - } - - args->returnValue(args->engine()->newQObject(object)); - model->emitChanges(); -} - -/*! - \qmlmethod QtQuick2::VisualDataGroup::resolve(int from, int to) - - Binds an unresolved item at \a from to an item in VisualDataModel::model at index \a to. - - Unresolved items are entries whose data has been \l {insert()}{inserted} into a VisualDataGroup - instead of being derived from a VisualDataModel::model index. Resolving an item will replace - the item at the target index with the unresolved item. A resolved an item will reflect the data - of the source model at its bound index and will move when that index moves like any other item. - - If a new item is replaced in the VisualDataGroup onChanged() handler its insertion and - replacement will be communicated to views as an atomic operation, creating the appearance - that the model contents have not changed, or if the unresolved and model item are not adjacent - that the previously unresolved item has simply moved. - -*/ -void QQuickVisualDataGroup::resolve(QQmlV8Function *args) -{ - Q_D(QQuickVisualDataGroup); - if (!d->model) - return; - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - - if (args->Length() < 2) - return; - - int from = -1; - int to = -1; - Compositor::Group fromGroup = d->group; - Compositor::Group toGroup = d->group; - - v8::Local<v8::Value> v = (*args)[0]; - if (d->parseIndex(v, &from, &fromGroup)) { - if (from < 0 || from >= model->m_compositor.count(fromGroup)) { - qmlInfo(this) << tr("resolve: from index out of range"); - return; - } - } else { - qmlInfo(this) << tr("resolve: from index invalid"); - return; - } - - v = (*args)[1]; - if (d->parseIndex(v, &to, &toGroup)) { - if (to < 0 || to >= model->m_compositor.count(toGroup)) { - qmlInfo(this) << tr("resolve: to index out of range"); - return; - } - } else { - qmlInfo(this) << tr("resolve: to index invalid"); - return; - } - - Compositor::iterator fromIt = model->m_compositor.find(fromGroup, from); - Compositor::iterator toIt = model->m_compositor.find(toGroup, to); - - if (!fromIt->isUnresolved()) { - qmlInfo(this) << tr("resolve: from is not an unresolved item"); - return; - } - if (!toIt->list) { - qmlInfo(this) << tr("resolve: to is not a model item"); - return; - } - - const int unresolvedFlags = fromIt->flags; - const int resolvedFlags = toIt->flags; - const int resolvedIndex = toIt.modelIndex(); - void * const resolvedList = toIt->list; - - QQuickVisualDataModelItem *cacheItem = model->m_cache.at(fromIt.cacheIndex); - cacheItem->groups &= ~Compositor::UnresolvedFlag; - - if (toIt.cacheIndex > fromIt.cacheIndex) - toIt.decrementIndexes(1, unresolvedFlags); - if (!toIt->inGroup(fromGroup) || toIt.index[fromGroup] > from) - from += 1; - - model->itemsMoved( - QVector<Compositor::Remove>() << Compositor::Remove(fromIt, 1, unresolvedFlags, 0), - QVector<Compositor::Insert>() << Compositor::Insert(toIt, 1, unresolvedFlags, 0)); - model->itemsInserted( - QVector<Compositor::Insert>() << Compositor::Insert(toIt, 1, (resolvedFlags & ~unresolvedFlags) | Compositor::CacheFlag)); - toIt.incrementIndexes(1, resolvedFlags | unresolvedFlags); - model->itemsRemoved(QVector<Compositor::Remove>() << Compositor::Remove(toIt, 1, resolvedFlags)); - - model->m_compositor.setFlags(toGroup, to, 1, unresolvedFlags & ~Compositor::UnresolvedFlag); - model->m_compositor.clearFlags(fromGroup, from, 1, unresolvedFlags); - - if (resolvedFlags & Compositor::CacheFlag) - model->m_compositor.insert(Compositor::Cache, toIt.cacheIndex, resolvedList, resolvedIndex, 1, Compositor::CacheFlag); - - Q_ASSERT(model->m_cache.count() == model->m_compositor.count(Compositor::Cache)); - - if (!cacheItem->isReferenced()) { - Q_ASSERT(toIt.cacheIndex == model->m_cache.indexOf(cacheItem)); - model->m_cache.removeAt(toIt.cacheIndex); - model->m_compositor.clearFlags(Compositor::Cache, toIt.cacheIndex, 1, Compositor::CacheFlag); - delete cacheItem; - Q_ASSERT(model->m_cache.count() == model->m_compositor.count(Compositor::Cache)); - } else { - cacheItem->resolveIndex(model->m_adaptorModel, resolvedIndex); - if (cacheItem->attached) - cacheItem->attached->emitUnresolvedChanged(); - } - - model->emitChanges(); -} - -/*! - \qmlmethod QtQuick2::VisualDataGroup::remove(int index, int count) - - Removes \a count items starting at \a index from the group. -*/ - -void QQuickVisualDataGroup::remove(QQmlV8Function *args) -{ - Q_D(QQuickVisualDataGroup); - if (!d->model) - return; - Compositor::Group group = d->group; - int index = -1; - int count = 1; - - if (args->Length() == 0) - return; - - int i = 0; - v8::Local<v8::Value> v = (*args)[i]; - if (!d->parseIndex(v, &index, &group)) { - qmlInfo(this) << tr("remove: invalid index"); - return; - } - - if (++i < args->Length()) { - v = (*args)[i]; - if (v->IsInt32()) - count = v->Int32Value(); - } - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - if (index < 0 || index >= model->m_compositor.count(group)) { - qmlInfo(this) << tr("remove: index out of range"); - } else if (count != 0) { - Compositor::iterator it = model->m_compositor.find(group, index); - if (count < 0 || count > model->m_compositor.count(d->group) - it.index[d->group]) { - qmlInfo(this) << tr("remove: invalid count"); - } else { - model->removeGroups(it, count, d->group, 1 << d->group); - } - } -} - -bool QQuickVisualDataGroupPrivate::parseGroupArgs( - QQmlV8Function *args, Compositor::Group *group, int *index, int *count, int *groups) const -{ - if (!model || !QQuickVisualDataModelPrivate::get(model)->m_cacheMetaType) - return false; - - if (args->Length() < 2) - return false; - - int i = 0; - v8::Local<v8::Value> v = (*args)[i]; - if (!parseIndex(v, index, group)) - return false; - - v = (*args)[++i]; - if (v->IsInt32()) { - *count = v->Int32Value(); - - if (++i == args->Length()) - return false; - v = (*args)[i]; - } - - *groups = QQuickVisualDataModelPrivate::get(model)->m_cacheMetaType->parseGroups(v); - - return true; -} - -/*! - \qmlmethod QtQuick2::VisualDataGroup::addGroups(int index, int count, stringlist groups) - - Adds \a count items starting at \a index to \a groups. -*/ - -void QQuickVisualDataGroup::addGroups(QQmlV8Function *args) -{ - Q_D(QQuickVisualDataGroup); - Compositor::Group group = d->group; - int index = -1; - int count = 1; - int groups = 0; - - if (!d->parseGroupArgs(args, &group, &index, &count, &groups)) - return; - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - if (index < 0 || index >= model->m_compositor.count(group)) { - qmlInfo(this) << tr("addGroups: index out of range"); - } else if (count != 0) { - Compositor::iterator it = model->m_compositor.find(group, index); - if (count < 0 || count > model->m_compositor.count(d->group) - it.index[d->group]) { - qmlInfo(this) << tr("addGroups: invalid count"); - } else { - model->addGroups(it, count, d->group, groups); - } - } -} - -/*! - \qmlmethod QtQuick2::VisualDataGroup::removeGroups(int index, int count, stringlist groups) - - Removes \a count items starting at \a index from \a groups. -*/ - -void QQuickVisualDataGroup::removeGroups(QQmlV8Function *args) -{ - Q_D(QQuickVisualDataGroup); - Compositor::Group group = d->group; - int index = -1; - int count = 1; - int groups = 0; - - if (!d->parseGroupArgs(args, &group, &index, &count, &groups)) - return; - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - if (index < 0 || index >= model->m_compositor.count(group)) { - qmlInfo(this) << tr("removeGroups: index out of range"); - } else if (count != 0) { - Compositor::iterator it = model->m_compositor.find(group, index); - if (count < 0 || count > model->m_compositor.count(d->group) - it.index[d->group]) { - qmlInfo(this) << tr("removeGroups: invalid count"); - } else { - model->removeGroups(it, count, d->group, groups); - } - } -} - -/*! - \qmlmethod QtQuick2::VisualDataGroup::setGroups(int index, int count, stringlist groups) - - Sets the \a groups \a count items starting at \a index belong to. -*/ - -void QQuickVisualDataGroup::setGroups(QQmlV8Function *args) -{ - Q_D(QQuickVisualDataGroup); - Compositor::Group group = d->group; - int index = -1; - int count = 1; - int groups = 0; - - if (!d->parseGroupArgs(args, &group, &index, &count, &groups)) - return; - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - if (index < 0 || index >= model->m_compositor.count(group)) { - qmlInfo(this) << tr("setGroups: index out of range"); - } else if (count != 0) { - Compositor::iterator it = model->m_compositor.find(group, index); - if (count < 0 || count > model->m_compositor.count(d->group) - it.index[d->group]) { - qmlInfo(this) << tr("setGroups: invalid count"); - } else { - model->setGroups(it, count, d->group, groups); - } - } -} - -/*! - \qmlmethod QtQuick2::VisualDataGroup::setGroups(int index, int count, stringlist groups) - - Sets the \a groups \a count items starting at \a index belong to. -*/ - -/*! - \qmlmethod QtQuick2::VisualDataGroup::move(var from, var to, int count) - - Moves \a count at \a from in a group \a to a new position. -*/ - -void QQuickVisualDataGroup::move(QQmlV8Function *args) -{ - Q_D(QQuickVisualDataGroup); - - if (args->Length() < 2) - return; - - Compositor::Group fromGroup = d->group; - Compositor::Group toGroup = d->group; - int from = -1; - int to = -1; - int count = 1; - - if (!d->parseIndex((*args)[0], &from, &fromGroup)) { - qmlInfo(this) << tr("move: invalid from index"); - return; - } - - if (!d->parseIndex((*args)[1], &to, &toGroup)) { - qmlInfo(this) << tr("move: invalid to index"); - return; - } - - if (args->Length() > 2) { - v8::Local<v8::Value> v = (*args)[2]; - if (v->IsInt32()) - count = v->Int32Value(); - } - - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(d->model); - - if (count < 0) { - qmlInfo(this) << tr("move: invalid count"); - } else if (from < 0 || from + count > model->m_compositor.count(fromGroup)) { - qmlInfo(this) << tr("move: from index out of range"); - } else if (!model->m_compositor.verifyMoveTo(fromGroup, from, toGroup, to, count, d->group)) { - qmlInfo(this) << tr("move: to index out of range"); - } else if (count > 0) { - QVector<Compositor::Remove> removes; - QVector<Compositor::Insert> inserts; - - model->m_compositor.move(fromGroup, from, toGroup, to, count, d->group, &removes, &inserts); - model->itemsMoved(removes, inserts); - model->emitChanges(); - } - -} - -/*! - \qmlsignal QtQuick2::VisualDataGroup::onChanged(array removed, array inserted) - - This handler is called when items have been removed from or inserted into the group. - - Each object in the \a removed and \a inserted arrays has two values; the \e index of the first - item inserted or removed and a \e count of the number of consecutive items inserted or removed. - - Each index is adjusted for previous changes with all removed items preceding any inserted - items. -*/ - -//============================================================================ - -QQuickVisualPartsModel::QQuickVisualPartsModel(QQuickVisualDataModel *model, const QString &part, QObject *parent) - : QQuickVisualModel(*new QObjectPrivate, parent) - , m_model(model) - , m_part(part) - , m_compositorGroup(Compositor::Cache) - , m_inheritGroup(true) -{ - QQuickVisualDataModelPrivate *d = QQuickVisualDataModelPrivate::get(m_model); - if (d->m_cacheMetaType) { - QQuickVisualDataGroupPrivate::get(d->m_groups[1])->emitters.insert(this); - m_compositorGroup = Compositor::Default; - } else { - d->m_pendingParts.insert(this); - } -} - -QQuickVisualPartsModel::~QQuickVisualPartsModel() -{ -} - -QString QQuickVisualPartsModel::filterGroup() const -{ - if (m_inheritGroup) - return m_model->filterGroup(); - return m_filterGroup; -} - -void QQuickVisualPartsModel::setFilterGroup(const QString &group) -{ - if (QQuickVisualDataModelPrivate::get(m_model)->m_transaction) { - qmlInfo(this) << tr("The group of a VisualDataModel cannot be changed within onChanged"); - return; - } - - if (m_filterGroup != group || m_inheritGroup) { - m_filterGroup = group; - m_inheritGroup = false; - updateFilterGroup(); - - emit filterGroupChanged(); - } -} - -void QQuickVisualPartsModel::resetFilterGroup() -{ - if (!m_inheritGroup) { - m_inheritGroup = true; - updateFilterGroup(); - emit filterGroupChanged(); - } -} - -void QQuickVisualPartsModel::updateFilterGroup() -{ - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(m_model); - if (!model->m_cacheMetaType) - return; - - if (m_inheritGroup) { - if (m_filterGroup == model->m_filterGroup) - return; - m_filterGroup = model->m_filterGroup; - } - - QQuickListCompositor::Group previousGroup = m_compositorGroup; - m_compositorGroup = Compositor::Default; - QQuickVisualDataGroupPrivate::get(model->m_groups[Compositor::Default])->emitters.insert(this); - for (int i = 1; i < model->m_groupCount; ++i) { - if (m_filterGroup == model->m_cacheMetaType->groupNames.at(i - 1)) { - m_compositorGroup = Compositor::Group(i); - break; - } - } - - QQuickVisualDataGroupPrivate::get(model->m_groups[m_compositorGroup])->emitters.insert(this); - if (m_compositorGroup != previousGroup) { - QVector<QQuickChangeSet::Remove> removes; - QVector<QQuickChangeSet::Insert> inserts; - model->m_compositor.transition(previousGroup, m_compositorGroup, &removes, &inserts); - - QQuickChangeSet changeSet; - changeSet.move(removes, inserts); - if (!changeSet.isEmpty()) - emit modelUpdated(changeSet, false); - - if (changeSet.difference() != 0) - emit countChanged(); - } -} - -void QQuickVisualPartsModel::updateFilterGroup( - Compositor::Group group, const QQuickChangeSet &changeSet) -{ - if (!m_inheritGroup) - return; - - m_compositorGroup = group; - QQuickVisualDataGroupPrivate::get(QQuickVisualDataModelPrivate::get(m_model)->m_groups[m_compositorGroup])->emitters.insert(this); - - if (!changeSet.isEmpty()) - emit modelUpdated(changeSet, false); - - if (changeSet.difference() != 0) - emit countChanged(); - - emit filterGroupChanged(); -} - -int QQuickVisualPartsModel::count() const -{ - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(m_model); - return model->m_delegate - ? model->m_compositor.count(m_compositorGroup) - : 0; -} - -bool QQuickVisualPartsModel::isValid() const -{ - return m_model->isValid(); -} - -QQuickItem *QQuickVisualPartsModel::item(int index, bool asynchronous) -{ - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(m_model); - - if (!model->m_delegate || index < 0 || index >= model->m_compositor.count(m_compositorGroup)) { - qWarning() << "VisualDataModel::item: index out range" << index << model->m_compositor.count(m_compositorGroup); - return 0; - } - - QObject *object = model->object(m_compositorGroup, index, asynchronous); - - if (QQuickPackage *package = qmlobject_cast<QQuickPackage *>(object)) { - QObject *part = package->part(m_part); - if (!part) - return 0; - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(part)) { - m_packaged.insertMulti(item, package); - return item; - } - } - - model->release(object); - if (!model->m_delegateValidated) { - if (object) - qmlInfo(model->m_delegate) << tr("Delegate component must be Package type."); - model->m_delegateValidated = true; - } - - return 0; -} - -QQuickVisualModel::ReleaseFlags QQuickVisualPartsModel::release(QQuickItem *item) -{ - QQuickVisualModel::ReleaseFlags flags = 0; - - QHash<QObject *, QQuickPackage *>::iterator it = m_packaged.find(item); - if (it != m_packaged.end()) { - QQuickPackage *package = *it; - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(m_model); - flags = model->release(package); - m_packaged.erase(it); - if (!m_packaged.contains(item)) - flags &= ~Referenced; - if (flags & Destroyed) - QQuickVisualDataModelPrivate::get(m_model)->emitDestroyingPackage(package); - } - return flags; -} - -QString QQuickVisualPartsModel::stringValue(int index, const QString &role) -{ - return QQuickVisualDataModelPrivate::get(m_model)->stringValue(m_compositorGroup, index, role); -} - -void QQuickVisualPartsModel::setWatchedRoles(QList<QByteArray> roles) -{ - QQuickVisualDataModelPrivate *model = QQuickVisualDataModelPrivate::get(m_model); - model->m_adaptorModel.replaceWatchedRoles(m_watchedRoles, roles); - m_watchedRoles = roles; -} - -int QQuickVisualPartsModel::indexOf(QQuickItem *item, QObject *) const -{ - QHash<QObject *, QQuickPackage *>::const_iterator it = m_packaged.find(item); - if (it != m_packaged.end()) { - if (QQuickVisualDataModelItem *cacheItem = QQuickVisualDataModelItem::dataForObject(*it)) - return cacheItem->groupIndex(m_compositorGroup); - } - return -1; -} - -void QQuickVisualPartsModel::createdPackage(int index, QQuickPackage *package) -{ - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(package->part(m_part))) - emit createdItem(index, item); -} - -void QQuickVisualPartsModel::initPackage(int index, QQuickPackage *package) -{ - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(package->part(m_part))) - emit initItem(index, item); -} - -void QQuickVisualPartsModel::destroyingPackage(QQuickPackage *package) -{ - if (QQuickItem *item = qmlobject_cast<QQuickItem *>(package->part(m_part))) { - Q_ASSERT(!m_packaged.contains(item)); - emit destroyingItem(item); - item->setParentItem(0); - } -} - -void QQuickVisualPartsModel::emitModelUpdated(const QQuickChangeSet &changeSet, bool reset) -{ - emit modelUpdated(changeSet, reset); - if (changeSet.difference() != 0) - emit countChanged(); -} - -//============================================================================ - -v8::Handle<v8::Value> get_change_index(v8::Local<v8::String>, const v8::AccessorInfo &info) -{ - return info.This()->GetInternalField(0); -} - -v8::Handle<v8::Value> get_change_count(v8::Local<v8::String>, const v8::AccessorInfo &info) -{ - return info.This()->GetInternalField(1); -} - -v8::Handle<v8::Value> get_change_moveId(v8::Local<v8::String>, const v8::AccessorInfo &info) -{ - return info.This()->GetInternalField(2); -} - -class QQuickVisualDataGroupChangeArray : public QV8ObjectResource -{ - V8_RESOURCE_TYPE(ChangeSetArrayType) -public: - QQuickVisualDataGroupChangeArray(QV8Engine *engine) - : QV8ObjectResource(engine) - { - } - - virtual quint32 count() const = 0; - virtual const QQuickChangeSet::Change &at(int index) const = 0; - - static v8::Handle<v8::Value> get_change(quint32 index, const v8::AccessorInfo &info) - { - QQuickVisualDataGroupChangeArray *array = v8_resource_cast<QQuickVisualDataGroupChangeArray>(info.This()); - V8ASSERT_TYPE(array, "Not a valid change array"); - - if (index >= array->count()) - return v8::Undefined(); - - const QQuickChangeSet::Change &change = array->at(index); - - v8::Local<v8::Object> object = engineData(array->engine)->constructorChange->NewInstance(); - object->SetInternalField(0, v8::Int32::New(change.index)); - object->SetInternalField(1, v8::Int32::New(change.count)); - if (change.isMove()) - object->SetInternalField(2, v8::Int32::New(change.moveId)); - - return object; - } - - static v8::Handle<v8::Value> get_length(v8::Local<v8::String>, const v8::AccessorInfo &info) - { - QQuickVisualDataGroupChangeArray *array = v8_resource_cast<QQuickVisualDataGroupChangeArray>(info.This()); - V8ASSERT_TYPE(array, "Not a valid change array"); - - return v8::Integer::New(array->count()); - } - - static v8::Local<v8::Function> constructor() - { - v8::Local<v8::FunctionTemplate> changeArray = v8::FunctionTemplate::New(); - changeArray->InstanceTemplate()->SetHasExternalResource(true); - changeArray->InstanceTemplate()->SetIndexedPropertyHandler(get_change); - changeArray->InstanceTemplate()->SetAccessor(v8::String::New("length"), get_length); - return changeArray->GetFunction(); - } -}; - -class QQuickVisualDataGroupRemoveArray : public QQuickVisualDataGroupChangeArray -{ -public: - QQuickVisualDataGroupRemoveArray(QV8Engine *engine, const QVector<QQuickChangeSet::Remove> &changes) - : QQuickVisualDataGroupChangeArray(engine) - , changes(changes) - { - } - - quint32 count() const { return changes.count(); } - const QQuickChangeSet::Change &at(int index) const { return changes.at(index); } - -private: - QVector<QQuickChangeSet::Remove> changes; -}; - -class QQuickVisualDataGroupInsertArray : public QQuickVisualDataGroupChangeArray -{ -public: - QQuickVisualDataGroupInsertArray(QV8Engine *engine, const QVector<QQuickChangeSet::Insert> &changes) - : QQuickVisualDataGroupChangeArray(engine) - , changes(changes) - { - } - - quint32 count() const { return changes.count(); } - const QQuickChangeSet::Change &at(int index) const { return changes.at(index); } - -private: - QVector<QQuickChangeSet::Insert> changes; -}; - -QQuickVisualDataModelEngineData::QQuickVisualDataModelEngineData(QV8Engine *) -{ - strings = qPersistentNew(v8::Array::New(StringCount)); - strings->Set(Model, v8::String::New("model")); - strings->Set(Groups, v8::String::New("groups")); - strings->Set(IsUnresolved, v8::String::New("isUnresolved")); - strings->Set(ItemsIndex, v8::String::New("itemsIndex")); - strings->Set(PersistedItemsIndex, v8::String::New("persistedItemsIndex")); - strings->Set(InItems, v8::String::New("inItems")); - strings->Set(InPersistedItems, v8::String::New("inPersistedItems")); - - v8::Local<v8::FunctionTemplate> change = v8::FunctionTemplate::New(); - change->InstanceTemplate()->SetAccessor(v8::String::New("index"), get_change_index); - change->InstanceTemplate()->SetAccessor(v8::String::New("count"), get_change_count); - change->InstanceTemplate()->SetAccessor(v8::String::New("moveId"), get_change_moveId); - change->InstanceTemplate()->SetInternalFieldCount(3); - constructorChange = qPersistentNew(change->GetFunction()); - constructorChangeArray = qPersistentNew(QQuickVisualDataGroupChangeArray::constructor()); -} - -QQuickVisualDataModelEngineData::~QQuickVisualDataModelEngineData() -{ - qPersistentDispose(strings); - qPersistentDispose(constructorChange); - qPersistentDispose(constructorChangeArray); -} - -v8::Local<v8::Object> QQuickVisualDataModelEngineData::array( - QV8Engine *engine, const QVector<QQuickChangeSet::Remove> &changes) -{ - v8::Local<v8::Object> array = constructorChangeArray->NewInstance(); - array->SetExternalResource(new QQuickVisualDataGroupRemoveArray(engine, changes)); - return array; -} - -v8::Local<v8::Object> QQuickVisualDataModelEngineData::array( - QV8Engine *engine, const QVector<QQuickChangeSet::Insert> &changes) -{ - v8::Local<v8::Object> array = constructorChangeArray->NewInstance(); - array->SetExternalResource(new QQuickVisualDataGroupInsertArray(engine, changes)); - return array; -} - -QT_END_NAMESPACE - |