From a129444bb0156c936900dbd2f12bd9f427ff366c Mon Sep 17 00:00:00 2001 From: Qt by Nokia Date: Wed, 27 Apr 2011 14:13:26 +0200 Subject: Initial import from qtquick2. Branched from the monolithic repo, Qt qtquick2 branch, at commit a4a585d2ee907746682846ae6e8a48e19deef469 --- src/declarative/items/qsgrepeater.cpp | 294 ++++++++++++++++++++++++++++++++++ 1 file changed, 294 insertions(+) create mode 100644 src/declarative/items/qsgrepeater.cpp (limited to 'src/declarative/items/qsgrepeater.cpp') diff --git a/src/declarative/items/qsgrepeater.cpp b/src/declarative/items/qsgrepeater.cpp new file mode 100644 index 0000000000..ac6086fc62 --- /dev/null +++ b/src/declarative/items/qsgrepeater.cpp @@ -0,0 +1,294 @@ +// Commit: a9f1eaa6a368bf7a72b52c428728a3e3e0a76209 +/**************************************************************************** +** +** 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qsgrepeater_p.h" +#include "qsgrepeater_p_p.h" +#include "qsgvisualitemmodel_p.h" + +#include +#include +#include + +QT_BEGIN_NAMESPACE + +QSGRepeaterPrivate::QSGRepeaterPrivate() +: model(0), ownModel(false) +{ +} + +QSGRepeaterPrivate::~QSGRepeaterPrivate() +{ + if (ownModel) + delete model; +} + +QSGRepeater::QSGRepeater(QSGItem *parent) + : QSGItem(*(new QSGRepeaterPrivate), parent) +{ +} + +QSGRepeater::~QSGRepeater() +{ +} + +QVariant QSGRepeater::model() const +{ + Q_D(const QSGRepeater); + return d->dataSource; +} + +void QSGRepeater::setModel(const QVariant &model) +{ + Q_D(QSGRepeater); + if (d->dataSource == model) + return; + + clear(); + if (d->model) { + disconnect(d->model, SIGNAL(itemsInserted(int,int)), this, SLOT(itemsInserted(int,int))); + disconnect(d->model, SIGNAL(itemsRemoved(int,int)), this, SLOT(itemsRemoved(int,int))); + disconnect(d->model, SIGNAL(itemsMoved(int,int,int)), this, SLOT(itemsMoved(int,int,int))); + disconnect(d->model, SIGNAL(modelReset()), this, SLOT(modelReset())); + /* + disconnect(d->model, SIGNAL(createdItem(int,QSGItem*)), this, SLOT(createdItem(int,QSGItem*))); + disconnect(d->model, SIGNAL(destroyingItem(QSGItem*)), this, SLOT(destroyingItem(QSGItem*))); + */ + } + d->dataSource = model; + QObject *object = qvariant_cast(model); + QSGVisualModel *vim = 0; + if (object && (vim = qobject_cast(object))) { + if (d->ownModel) { + delete d->model; + d->ownModel = false; + } + d->model = vim; + } else { + if (!d->ownModel) { + d->model = new QSGVisualDataModel(qmlContext(this)); + d->ownModel = true; + } + if (QSGVisualDataModel *dataModel = qobject_cast(d->model)) + dataModel->setModel(model); + } + if (d->model) { + connect(d->model, SIGNAL(itemsInserted(int,int)), this, SLOT(itemsInserted(int,int))); + connect(d->model, SIGNAL(itemsRemoved(int,int)), this, SLOT(itemsRemoved(int,int))); + connect(d->model, SIGNAL(itemsMoved(int,int,int)), this, SLOT(itemsMoved(int,int,int))); + connect(d->model, SIGNAL(modelReset()), this, SLOT(modelReset())); + /* + connect(d->model, SIGNAL(createdItem(int,QSGItem*)), this, SLOT(createdItem(int,QSGItem*))); + connect(d->model, SIGNAL(destroyingItem(QSGItem*)), this, SLOT(destroyingItem(QSGItem*))); + */ + regenerate(); + } + emit modelChanged(); + emit countChanged(); +} + +QDeclarativeComponent *QSGRepeater::delegate() const +{ + Q_D(const QSGRepeater); + if (d->model) { + if (QSGVisualDataModel *dataModel = qobject_cast(d->model)) + return dataModel->delegate(); + } + + return 0; +} + +void QSGRepeater::setDelegate(QDeclarativeComponent *delegate) +{ + Q_D(QSGRepeater); + if (QSGVisualDataModel *dataModel = qobject_cast(d->model)) + if (delegate == dataModel->delegate()) + return; + + if (!d->ownModel) { + d->model = new QSGVisualDataModel(qmlContext(this)); + d->ownModel = true; + } + if (QSGVisualDataModel *dataModel = qobject_cast(d->model)) { + dataModel->setDelegate(delegate); + regenerate(); + emit delegateChanged(); + } +} + +int QSGRepeater::count() const +{ + Q_D(const QSGRepeater); + if (d->model) + return d->model->count(); + return 0; +} + +QSGItem *QSGRepeater::itemAt(int index) const +{ + Q_D(const QSGRepeater); + if (index >= 0 && index < d->deletables.count()) + return d->deletables[index]; + return 0; +} + +void QSGRepeater::componentComplete() +{ + QSGItem::componentComplete(); + regenerate(); +} + +void QSGRepeater::itemChange(ItemChange change, const ItemChangeData &value) +{ + QSGItem::itemChange(change, value); + if (change == ItemParentHasChanged) { + regenerate(); + } +} + +void QSGRepeater::clear() +{ + Q_D(QSGRepeater); + bool complete = isComponentComplete(); + + if (d->model) { + while (d->deletables.count() > 0) { + QSGItem *item = d->deletables.takeLast(); + if (complete) + emit itemRemoved(d->deletables.count()-1, item); + d->model->release(item); + } + } + d->deletables.clear(); +} + +void QSGRepeater::regenerate() +{ + Q_D(QSGRepeater); + if (!isComponentComplete()) + return; + + clear(); + + if (!d->model || !d->model->count() || !d->model->isValid() || !parentItem() || !isComponentComplete()) + return; + + for (int ii = 0; ii < count(); ++ii) { + QSGItem *item = d->model->item(ii); + if (item) { + QDeclarative_setParent_noEvent(item, parentItem()); + item->setParentItem(parentItem()); + item->stackBefore(this); + d->deletables << item; + emit itemAdded(ii, item); + } + } +} + +void QSGRepeater::itemsInserted(int index, int count) +{ + Q_D(QSGRepeater); + if (!isComponentComplete()) + return; + for (int i = 0; i < count; ++i) { + int modelIndex = index + i; + QSGItem *item = d->model->item(modelIndex); + if (item) { + QDeclarative_setParent_noEvent(item, parentItem()); + item->setParentItem(parentItem()); + if (modelIndex < d->deletables.count()) + item->stackBefore(d->deletables.at(modelIndex)); + else + item->stackBefore(this); + d->deletables.insert(modelIndex, item); + emit itemAdded(modelIndex, item); + } + } + emit countChanged(); +} + +void QSGRepeater::itemsRemoved(int index, int count) +{ + Q_D(QSGRepeater); + if (!isComponentComplete() || count <= 0) + return; + while (count--) { + QSGItem *item = d->deletables.takeAt(index); + emit itemRemoved(index, item); + if (item) + d->model->release(item); + else + break; + } + emit countChanged(); +} + +void QSGRepeater::itemsMoved(int from, int to, int count) +{ + Q_D(QSGRepeater); + if (!isComponentComplete() || count <= 0) + return; + if (from + count > d->deletables.count()) { + regenerate(); + return; + } + QList removed; + int removedCount = count; + while (removedCount--) + removed << d->deletables.takeAt(from); + for (int i = 0; i < count; ++i) + d->deletables.insert(to + i, removed.at(i)); + d->deletables.last()->stackBefore(this); + for (int i = d->model->count()-1; i > 0; --i) { + QSGItem *item = d->deletables.at(i-1); + item->stackBefore(d->deletables.at(i)); + } +} + +void QSGRepeater::modelReset() +{ + if (!isComponentComplete()) + return; + regenerate(); + emit countChanged(); +} + +QT_END_NAMESPACE -- cgit v1.2.3