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Diffstat (limited to 'src/declarative/items/qquickrepeater.cpp')
| -rw-r--r-- | src/declarative/items/qquickrepeater.cpp | 476 |
1 files changed, 0 insertions, 476 deletions
diff --git a/src/declarative/items/qquickrepeater.cpp b/src/declarative/items/qquickrepeater.cpp deleted file mode 100644 index efa83eec38..0000000000 --- a/src/declarative/items/qquickrepeater.cpp +++ /dev/null @@ -1,476 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtDeclarative module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** This file may be used under the terms of the GNU Lesser General Public -** License version 2.1 as published by the Free Software Foundation and -** appearing in the file LICENSE.LGPL included in the packaging of this -** file. Please review the following information to ensure the GNU Lesser -** General Public License version 2.1 requirements will be met: -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** 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. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qquickrepeater_p.h" -#include "qquickrepeater_p_p.h" -#include "qquickvisualdatamodel_p.h" - -#include <private/qdeclarativeglobal_p.h> -#include <private/qdeclarativelistaccessor_p.h> -#include <private/qlistmodelinterface_p.h> -#include <private/qdeclarativechangeset_p.h> - -QT_BEGIN_NAMESPACE - -QQuickRepeaterPrivate::QQuickRepeaterPrivate() - : model(0), ownModel(false), inRequest(false), itemCount(0), createFrom(-1) -{ -} - -QQuickRepeaterPrivate::~QQuickRepeaterPrivate() -{ - if (ownModel) - delete model; -} - -/*! - \qmlclass Repeater QQuickRepeater - \inqmlmodule QtQuick 2 - \ingroup qml-utility-elements - \inherits Item - - \brief The Repeater element allows you to repeat an Item-based component using a model. - - The Repeater element is used to create a large number of - similar items. Like other view elements, a Repeater has a \l model and a \l delegate: - for each entry in the model, the delegate is instantiated - in a context seeded with data from the model. A Repeater item is usually - enclosed in a positioner element such as \l Row or \l Column to visually - position the multiple delegate items created by the Repeater. - - The following Repeater creates three instances of a \l Rectangle item within - a \l Row: - - \snippet doc/src/snippets/declarative/repeaters/repeater.qml import - \codeline - \snippet doc/src/snippets/declarative/repeaters/repeater.qml simple - - \image repeater-simple.png - - A Repeater's \l model can be any of the supported \l {qmlmodels}{data models}. - Additionally, like delegates for other views, a Repeater delegate can access - its index within the repeater, as well as the model data relevant to the - delegate. See the \l delegate property documentation for details. - - Items instantiated by the Repeater are inserted, in order, as - children of the Repeater's parent. The insertion starts immediately after - the repeater's position in its parent stacking list. This allows - a Repeater to be used inside a layout. For example, the following Repeater's - items are stacked between a red rectangle and a blue rectangle: - - \snippet doc/src/snippets/declarative/repeaters/repeater.qml layout - - \image repeater.png - - - \note A Repeater item owns all items it instantiates. Removing or dynamically destroying - an item created by a Repeater results in unpredictable behavior. - - - \section2 Considerations when using Repeater - - The Repeater element creates all of its delegate items when the repeater is first - created. This can be inefficient if there are a large number of delegate items and - not all of the items are required to be visible at the same time. If this is the case, - consider using other view elements like ListView (which only creates delegate items - when they are scrolled into view) or use the \l {Dynamic Object Creation} methods to - create items as they are required. - - Also, note that Repeater is \l {Item}-based, and can only repeat \l {Item}-derived objects. - For example, it cannot be used to repeat QtObjects: - \badcode - Item { - //XXX does not work! Can't repeat QtObject as it doesn't derive from Item. - Repeater { - model: 10 - QtObject {} - } - } - \endcode - */ - -/*! - \qmlsignal QtQuick2::Repeater::onItemAdded(int index, Item item) - - This handler is called when an item is added to the repeater. The \a index - parameter holds the index at which the item has been inserted within the - repeater, and the \a item parameter holds the \l Item that has been added. -*/ - -/*! - \qmlsignal QtQuick2::Repeater::onItemRemoved(int index, Item item) - - This handler is called when an item is removed from the repeater. The \a index - parameter holds the index at which the item was removed from the repeater, - and the \a item parameter holds the \l Item that was removed. - - Do not keep a reference to \a item if it was created by this repeater, as - in these cases it will be deleted shortly after the handler is called. -*/ -QQuickRepeater::QQuickRepeater(QQuickItem *parent) - : QQuickItem(*(new QQuickRepeaterPrivate), parent) -{ -} - -QQuickRepeater::~QQuickRepeater() -{ -} - -/*! - \qmlproperty any QtQuick2::Repeater::model - - The model providing data for the repeater. - - This property can be set to any of the supported \l {qmlmodels}{data models}: - - \list - \o A number that indicates the number of delegates to be created by the repeater - \o A model (e.g. a ListModel item, or a QAbstractItemModel subclass) - \o A string list - \o An object list - \endlist - - The type of model affects the properties that are exposed to the \l delegate. - - \sa {qmlmodels}{Data Models} -*/ -QVariant QQuickRepeater::model() const -{ - Q_D(const QQuickRepeater); - return d->dataSource; -} - -void QQuickRepeater::setModel(const QVariant &model) -{ - Q_D(QQuickRepeater); - if (d->dataSource == model) - return; - - clear(); - if (d->model) { - disconnect(d->model, SIGNAL(modelUpdated(QDeclarativeChangeSet,bool)), - this, SLOT(modelUpdated(QDeclarativeChangeSet,bool))); - disconnect(d->model, SIGNAL(createdItem(int,QQuickItem*)), this, SLOT(createdItem(int,QQuickItem*))); - disconnect(d->model, SIGNAL(initItem(int,QQuickItem*)), this, SLOT(initItem(int,QQuickItem*))); -// disconnect(d->model, SIGNAL(destroyingItem(QQuickItem*)), this, SLOT(destroyingItem(QQuickItem*))); - } - d->dataSource = model; - QObject *object = qvariant_cast<QObject*>(model); - QQuickVisualModel *vim = 0; - if (object && (vim = qobject_cast<QQuickVisualModel *>(object))) { - if (d->ownModel) { - delete d->model; - d->ownModel = false; - } - d->model = vim; - } else { - if (!d->ownModel) { - d->model = new QQuickVisualDataModel(qmlContext(this)); - d->ownModel = true; - if (isComponentComplete()) - static_cast<QQuickVisualDataModel *>(d->model)->componentComplete(); - } - if (QQuickVisualDataModel *dataModel = qobject_cast<QQuickVisualDataModel*>(d->model)) - dataModel->setModel(model); - } - if (d->model) { - connect(d->model, SIGNAL(modelUpdated(QDeclarativeChangeSet,bool)), - this, SLOT(modelUpdated(QDeclarativeChangeSet,bool))); - connect(d->model, SIGNAL(createdItem(int,QQuickItem*)), this, SLOT(createdItem(int,QQuickItem*))); - connect(d->model, SIGNAL(initItem(int,QQuickItem*)), this, SLOT(initItem(int,QQuickItem*))); -// connect(d->model, SIGNAL(destroyingItem(QQuickItem*)), this, SLOT(destroyingItem(QQuickItem*))); - regenerate(); - } - emit modelChanged(); - emit countChanged(); -} - -/*! - \qmlproperty Component QtQuick2::Repeater::delegate - \default - - The delegate provides a template defining each item instantiated by the repeater. - - Delegates are exposed to a read-only \c index property that indicates the index - of the delegate within the repeater. For example, the following \l Text delegate - displays the index of each repeated item: - - \table - \row - \o \snippet doc/src/snippets/declarative/repeaters/repeater.qml index - \o \image repeater-index.png - \endtable - - If the \l model is a \l{QStringList-based model}{string list} or - \l{QObjectList-based model}{object list}, the delegate is also exposed to - a read-only \c modelData property that holds the string or object data. For - example: - - \table - \row - \o \snippet doc/src/snippets/declarative/repeaters/repeater.qml modeldata - \o \image repeater-modeldata.png - \endtable - - If the \l model is a model object (such as a \l ListModel) the delegate - can access all model roles as named properties, in the same way that delegates - do for view classes like ListView. - - \sa {QML Data Models} - */ -QDeclarativeComponent *QQuickRepeater::delegate() const -{ - Q_D(const QQuickRepeater); - if (d->model) { - if (QQuickVisualDataModel *dataModel = qobject_cast<QQuickVisualDataModel*>(d->model)) - return dataModel->delegate(); - } - - return 0; -} - -void QQuickRepeater::setDelegate(QDeclarativeComponent *delegate) -{ - Q_D(QQuickRepeater); - if (QQuickVisualDataModel *dataModel = qobject_cast<QQuickVisualDataModel*>(d->model)) - if (delegate == dataModel->delegate()) - return; - - if (!d->ownModel) { - d->model = new QQuickVisualDataModel(qmlContext(this)); - d->ownModel = true; - } - if (QQuickVisualDataModel *dataModel = qobject_cast<QQuickVisualDataModel*>(d->model)) { - dataModel->setDelegate(delegate); - regenerate(); - emit delegateChanged(); - } -} - -/*! - \qmlproperty int QtQuick2::Repeater::count - - This property holds the number of items in the repeater. -*/ -int QQuickRepeater::count() const -{ - Q_D(const QQuickRepeater); - if (d->model) - return d->model->count(); - return 0; -} - -/*! - \qmlmethod Item QtQuick2::Repeater::itemAt(index) - - Returns the \l Item that has been created at the given \a index, or \c null - if no item exists at \a index. -*/ -QQuickItem *QQuickRepeater::itemAt(int index) const -{ - Q_D(const QQuickRepeater); - if (index >= 0 && index < d->deletables.count()) - return d->deletables[index]; - return 0; -} - -void QQuickRepeater::componentComplete() -{ - Q_D(QQuickRepeater); - if (d->model && d->ownModel) - static_cast<QQuickVisualDataModel *>(d->model)->componentComplete(); - QQuickItem::componentComplete(); - regenerate(); - if (d->model && d->model->count()) - emit countChanged(); -} - -void QQuickRepeater::itemChange(ItemChange change, const ItemChangeData &value) -{ - QQuickItem::itemChange(change, value); - if (change == ItemParentHasChanged) { - regenerate(); - } -} - -void QQuickRepeater::clear() -{ - Q_D(QQuickRepeater); - bool complete = isComponentComplete(); - - if (d->model) { - for (int i = 0; i < d->deletables.count(); ++i) { - QQuickItem *item = d->deletables.at(i); - if (complete) - emit itemRemoved(i, item); - d->model->release(item); - } - } - d->deletables.clear(); - d->itemCount = 0; -} - -void QQuickRepeater::regenerate() -{ - Q_D(QQuickRepeater); - if (!isComponentComplete()) - return; - - clear(); - - if (!d->model || !d->model->count() || !d->model->isValid() || !parentItem() || !isComponentComplete()) - return; - - d->itemCount = count(); - d->deletables.resize(d->itemCount); - d->createFrom = 0; - d->createItems(); -} - -void QQuickRepeaterPrivate::createItems() -{ - Q_Q(QQuickRepeater); - if (createFrom == -1) - return; - inRequest = true; - for (int ii = createFrom; ii < itemCount; ++ii) { - if (!deletables.at(ii)) { - QQuickItem *item = model->item(ii, false); - if (!item) { - createFrom = ii; - break; - } - deletables[ii] = item; - QDeclarative_setParent_noEvent(item, q->parentItem()); - item->setParentItem(q->parentItem()); - if (ii > 0 && deletables.at(ii-1)) { - item->stackAfter(deletables.at(ii-1)); - } else { - QQuickItem *after = q; - for (int si = ii+1; si < itemCount; ++si) { - if (deletables.at(si)) { - after = deletables.at(si); - break; - } - } - item->stackBefore(after); - } - emit q->itemAdded(ii, item); - } - } - inRequest = false; -} - -void QQuickRepeater::createdItem(int, QQuickItem *) -{ - Q_D(QQuickRepeater); - if (!d->inRequest) - d->createItems(); -} - -void QQuickRepeater::initItem(int, QQuickItem *item) -{ - QDeclarative_setParent_noEvent(item, parentItem()); - item->setParentItem(parentItem()); -} - -void QQuickRepeater::modelUpdated(const QDeclarativeChangeSet &changeSet, bool reset) -{ - Q_D(QQuickRepeater); - - if (!isComponentComplete()) - return; - - if (reset) { - regenerate(); - emit countChanged(); - } - - int difference = 0; - QHash<int, QVector<QPointer<QQuickItem> > > moved; - foreach (const QDeclarativeChangeSet::Remove &remove, changeSet.removes()) { - int index = qMin(remove.index, d->deletables.count()); - int count = qMin(remove.index + remove.count, d->deletables.count()) - index; - if (remove.isMove()) { - moved.insert(remove.moveId, d->deletables.mid(index, count)); - d->deletables.erase( - d->deletables.begin() + index, - d->deletables.begin() + index + count); - } else while (count--) { - QQuickItem *item = d->deletables.at(index); - d->deletables.remove(index); - emit itemRemoved(index, item); - if (item) - d->model->release(item); - --d->itemCount; - } - - difference -= remove.count; - } - - d->createFrom = -1; - foreach (const QDeclarativeChangeSet::Insert &insert, changeSet.inserts()) { - int index = qMin(insert.index, d->deletables.count()); - if (insert.isMove()) { - QVector<QPointer<QQuickItem> > items = moved.value(insert.moveId); - d->deletables = d->deletables.mid(0, index) + items + d->deletables.mid(index); - QQuickItem *stackBefore = index + items.count() < d->deletables.count() - ? d->deletables.at(index + items.count()) - : this; - for (int i = index; i < index + items.count(); ++i) - d->deletables.at(i)->stackBefore(stackBefore); - } else for (int i = 0; i < insert.count; ++i) { - int modelIndex = index + i; - ++d->itemCount; - d->deletables.insert(modelIndex, 0); - if (d->createFrom == -1) - d->createFrom = modelIndex; - } - difference += insert.count; - } - - d->createItems(); - - if (difference != 0) - emit countChanged(); -} - -QT_END_NAMESPACE |