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Diffstat (limited to 'src/qml/types/qqmlinstantiator.cpp')
| -rw-r--r-- | src/qml/types/qqmlinstantiator.cpp | 509 |
1 files changed, 0 insertions, 509 deletions
diff --git a/src/qml/types/qqmlinstantiator.cpp b/src/qml/types/qqmlinstantiator.cpp deleted file mode 100644 index a23ec0f2b4..0000000000 --- a/src/qml/types/qqmlinstantiator.cpp +++ /dev/null @@ -1,509 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 Research In Motion. -** Contact: https://www.qt.io/licensing/ -** -** 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 The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/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 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qqmlinstantiator_p.h" -#include "qqmlinstantiator_p_p.h" -#include <QtQml/QQmlContext> -#include <QtQml/QQmlComponent> -#include <QtQml/QQmlInfo> -#include <QtQml/QQmlError> -#include <QtQml/private/qqmlobjectmodel_p.h> -#if QT_CONFIG(qml_delegate_model) -#include <QtQml/private/qqmldelegatemodel_p.h> -#endif - -QT_BEGIN_NAMESPACE - -QQmlInstantiatorPrivate::QQmlInstantiatorPrivate() - : componentComplete(true) - , effectiveReset(false) - , active(true) - , async(false) -#if QT_CONFIG(qml_delegate_model) - , ownModel(false) -#endif - , requestedIndex(-1) - , model(QVariant(1)) - , instanceModel(nullptr) - , delegate(nullptr) -{ -} - -QQmlInstantiatorPrivate::~QQmlInstantiatorPrivate() -{ - qDeleteAll(objects); -} - -void QQmlInstantiatorPrivate::clear() -{ - Q_Q(QQmlInstantiator); - if (!instanceModel) - return; - if (!objects.count()) - return; - - for (int i=0; i < objects.count(); i++) { - q->objectRemoved(i, objects[i]); - instanceModel->release(objects[i]); - } - objects.clear(); - q->objectChanged(); -} - -QObject *QQmlInstantiatorPrivate::modelObject(int index, bool async) -{ - requestedIndex = index; - QObject *o = instanceModel->object(index, async ? QQmlIncubator::Asynchronous : QQmlIncubator::AsynchronousIfNested); - requestedIndex = -1; - return o; -} - - -void QQmlInstantiatorPrivate::regenerate() -{ - Q_Q(QQmlInstantiator); - if (!componentComplete) - return; - - int prevCount = q->count(); - - clear(); - - if (!active || !instanceModel || !instanceModel->count() || !instanceModel->isValid()) { - if (prevCount) - q->countChanged(); - return; - } - - for (int i = 0; i < instanceModel->count(); i++) { - QObject *object = modelObject(i, async); - // If the item was already created we won't get a createdItem - if (object) - _q_createdItem(i, object); - } - if (q->count() != prevCount) - q->countChanged(); -} - -void QQmlInstantiatorPrivate::_q_createdItem(int idx, QObject* item) -{ - Q_Q(QQmlInstantiator); - if (objects.contains(item)) //Case when it was created synchronously in regenerate - return; - if (requestedIndex != idx) // Asynchronous creation, reference the object - (void)instanceModel->object(idx); - item->setParent(q); - if (objects.size() < idx + 1) { - int modelCount = instanceModel->count(); - if (objects.capacity() < modelCount) - objects.reserve(modelCount); - objects.resize(idx + 1); - } - if (QObject *o = objects.at(idx)) - instanceModel->release(o); - objects.replace(idx, item); - if (objects.count() == 1) - q->objectChanged(); - q->objectAdded(idx, item); -} - -void QQmlInstantiatorPrivate::_q_modelUpdated(const QQmlChangeSet &changeSet, bool reset) -{ - Q_Q(QQmlInstantiator); - - if (!componentComplete || effectiveReset) - return; - - if (reset) { - regenerate(); - if (changeSet.difference() != 0) - q->countChanged(); - return; - } - - int difference = 0; - QHash<int, QVector<QPointer<QObject> > > moved; - const QVector<QQmlChangeSet::Change> &removes = changeSet.removes(); - for (const QQmlChangeSet::Change &remove : removes) { - int index = qMin(remove.index, objects.count()); - int count = qMin(remove.index + remove.count, objects.count()) - index; - if (remove.isMove()) { - moved.insert(remove.moveId, objects.mid(index, count)); - objects.erase( - objects.begin() + index, - objects.begin() + index + count); - } else while (count--) { - QObject *obj = objects.at(index); - objects.remove(index); - q->objectRemoved(index, obj); - if (obj) - instanceModel->release(obj); - } - - difference -= remove.count; - } - - const QVector<QQmlChangeSet::Change> &inserts = changeSet.inserts(); - for (const QQmlChangeSet::Change &insert : inserts) { - int index = qMin(insert.index, objects.count()); - if (insert.isMove()) { - QVector<QPointer<QObject> > movedObjects = moved.value(insert.moveId); - objects = objects.mid(0, index) + movedObjects + objects.mid(index); - } else { - if (insert.index <= objects.size()) - objects.insert(insert.index, insert.count, nullptr); - for (int i = 0; i < insert.count; ++i) { - int modelIndex = index + i; - QObject* obj = modelObject(modelIndex, async); - if (obj) - _q_createdItem(modelIndex, obj); - } - } - difference += insert.count; - } - - if (difference != 0) - q->countChanged(); -} - -#if QT_CONFIG(qml_delegate_model) -void QQmlInstantiatorPrivate::makeModel() -{ - Q_Q(QQmlInstantiator); - QQmlDelegateModel* delegateModel = new QQmlDelegateModel(qmlContext(q), q); - instanceModel = delegateModel; - ownModel = true; - delegateModel->setDelegate(delegate); - delegateModel->classBegin(); //Pretend it was made in QML - if (componentComplete) - delegateModel->componentComplete(); -} -#endif - - -/*! - \qmltype Instantiator - \instantiates QQmlInstantiator - \inqmlmodule QtQml - \brief Dynamically creates objects. - - A Instantiator can be used to control the dynamic creation of objects, or to dynamically - create multiple objects from a template. - - The Instantiator element will manage the objects it creates. Those objects are parented to the - Instantiator and can also be deleted by the Instantiator if the Instantiator's properties change. Objects - can also be destroyed dynamically through other means, and the Instantiator will not recreate - them unless the properties of the Instantiator change. - -*/ -QQmlInstantiator::QQmlInstantiator(QObject *parent) - : QObject(*(new QQmlInstantiatorPrivate), parent) -{ -} - -QQmlInstantiator::~QQmlInstantiator() -{ -} - -/*! - \qmlsignal QtQml::Instantiator::objectAdded(int index, QtObject object) - - This signal is emitted when an object is added to the Instantiator. The \a index - parameter holds the index which the object has been given, and the \a object - parameter holds the \l QtObject that has been added. - - The corresponding handler is \c onObjectAdded. -*/ - -/*! - \qmlsignal QtQml::Instantiator::objectRemoved(int index, QtObject object) - - This signal is emitted when an object is removed from the Instantiator. The \a index - parameter holds the index which the object had been given, and the \a object - parameter holds the \l QtObject that has been removed. - - Do not keep a reference to \a object if it was created by this Instantiator, as - in these cases it will be deleted shortly after the signal is handled. - - The corresponding handler is \c onObjectRemoved. -*/ -/*! - \qmlproperty bool QtQml::Instantiator::active - - When active is true, and the delegate component is ready, the Instantiator will - create objects according to the model. When active is false, no objects - will be created and any previously created objects will be destroyed. - - Default is true. -*/ -bool QQmlInstantiator::isActive() const -{ - Q_D(const QQmlInstantiator); - return d->active; -} - -void QQmlInstantiator::setActive(bool newVal) -{ - Q_D(QQmlInstantiator); - if (newVal == d->active) - return; - d->active = newVal; - emit activeChanged(); - d->regenerate(); -} - -/*! - \qmlproperty bool QtQml::Instantiator::asynchronous - - When asynchronous is true the Instantiator will attempt to create objects - asynchronously. This means that objects may not be available immediately, - even if active is set to true. - - You can use the objectAdded signal to respond to items being created. - - Default is false. -*/ -bool QQmlInstantiator::isAsync() const -{ - Q_D(const QQmlInstantiator); - return d->async; -} - -void QQmlInstantiator::setAsync(bool newVal) -{ - Q_D(QQmlInstantiator); - if (newVal == d->async) - return; - d->async = newVal; - emit asynchronousChanged(); -} - - -/*! - \qmlproperty int QtQml::Instantiator::count - - The number of objects the Instantiator is currently managing. -*/ - -int QQmlInstantiator::count() const -{ - Q_D(const QQmlInstantiator); - return d->objects.count(); -} - -/*! - \qmlproperty QtQml::Component QtQml::Instantiator::delegate - \default - - The component used to create all objects. - - Note that an extra variable, index, will be available inside instances of the - delegate. This variable refers to the index of the instance inside the Instantiator, - and can be used to obtain the object through the objectAt method of the Instantiator. - - If this property is changed, all instances using the old delegate will be destroyed - and new instances will be created using the new delegate. -*/ -QQmlComponent* QQmlInstantiator::delegate() -{ - Q_D(QQmlInstantiator); - return d->delegate; -} - -void QQmlInstantiator::setDelegate(QQmlComponent* c) -{ - Q_D(QQmlInstantiator); - if (c == d->delegate) - return; - - d->delegate = c; - emit delegateChanged(); - -#if QT_CONFIG(qml_delegate_model) - if (!d->ownModel) - return; - - if (QQmlDelegateModel *dModel = qobject_cast<QQmlDelegateModel*>(d->instanceModel)) - dModel->setDelegate(c); - if (d->componentComplete) - d->regenerate(); -#endif -} - -/*! - \qmlproperty variant QtQml::Instantiator::model - - This property can be set to any of the supported \l {qml-data-models}{data models}: - - \list - \li A number that indicates the number of delegates to be created by the repeater - \li A model (e.g. a ListModel item, or a QAbstractItemModel subclass) - \li A string list - \li An object list - \endlist - - The type of model affects the properties that are exposed to the \l delegate. - - Default value is 1, which creates a single delegate instance. - - \sa {qml-data-models}{Data Models} -*/ - -QVariant QQmlInstantiator::model() const -{ - Q_D(const QQmlInstantiator); - return d->model; -} - -void QQmlInstantiator::setModel(const QVariant &v) -{ - Q_D(QQmlInstantiator); - if (d->model == v) - return; - - d->model = v; - //Don't actually set model until componentComplete in case it wants to create its delegates immediately - if (!d->componentComplete) - return; - - QQmlInstanceModel *prevModel = d->instanceModel; - QObject *object = qvariant_cast<QObject*>(v); - QQmlInstanceModel *vim = nullptr; - if (object && (vim = qobject_cast<QQmlInstanceModel *>(object))) { -#if QT_CONFIG(qml_delegate_model) - if (d->ownModel) { - delete d->instanceModel; - prevModel = nullptr; - d->ownModel = false; - } -#endif - d->instanceModel = vim; -#if QT_CONFIG(qml_delegate_model) - } else if (v != QVariant(0)){ - if (!d->ownModel) - d->makeModel(); - - if (QQmlDelegateModel *dataModel = qobject_cast<QQmlDelegateModel *>(d->instanceModel)) { - d->effectiveReset = true; - dataModel->setModel(v); - d->effectiveReset = false; - } -#endif - } - - if (d->instanceModel != prevModel) { - if (prevModel) { - disconnect(prevModel, SIGNAL(modelUpdated(QQmlChangeSet,bool)), - this, SLOT(_q_modelUpdated(QQmlChangeSet,bool))); - disconnect(prevModel, SIGNAL(createdItem(int,QObject*)), this, SLOT(_q_createdItem(int,QObject*))); - //disconnect(prevModel, SIGNAL(initItem(int,QObject*)), this, SLOT(initItem(int,QObject*))); - } - - if (d->instanceModel) { - connect(d->instanceModel, SIGNAL(modelUpdated(QQmlChangeSet,bool)), - this, SLOT(_q_modelUpdated(QQmlChangeSet,bool))); - connect(d->instanceModel, SIGNAL(createdItem(int,QObject*)), this, SLOT(_q_createdItem(int,QObject*))); - //connect(d->instanceModel, SIGNAL(initItem(int,QObject*)), this, SLOT(initItem(int,QObject*))); - } - } - - d->regenerate(); - emit modelChanged(); -} - -/*! - \qmlproperty QtObject QtQml::Instantiator::object - - This is a reference to the first created object, intended as a convenience - for the case where only one object has been created. -*/ -QObject *QQmlInstantiator::object() const -{ - Q_D(const QQmlInstantiator); - if (d->objects.count()) - return d->objects[0]; - return nullptr; -} - -/*! - \qmlmethod QtObject QtQml::Instantiator::objectAt(int index) - - Returns a reference to the object with the given \a index. -*/ -QObject *QQmlInstantiator::objectAt(int index) const -{ - Q_D(const QQmlInstantiator); - if (index >= 0 && index < d->objects.count()) - return d->objects[index]; - return nullptr; -} - -/*! - \internal -*/ -void QQmlInstantiator::classBegin() -{ - Q_D(QQmlInstantiator); - d->componentComplete = false; -} - -/*! - \internal -*/ -void QQmlInstantiator::componentComplete() -{ - Q_D(QQmlInstantiator); - d->componentComplete = true; -#if QT_CONFIG(qml_delegate_model) - if (d->ownModel) { - static_cast<QQmlDelegateModel*>(d->instanceModel)->componentComplete(); - d->regenerate(); - } else -#endif - { - QVariant realModel = d->model; - d->model = QVariant(0); - setModel(realModel); //If realModel == d->model this won't do anything, but that's fine since the model's 0 - //setModel calls regenerate - } -} - -QT_END_NAMESPACE - -#include "moc_qqmlinstantiator_p.cpp" |