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Diffstat (limited to 'src/declarative/util/qdeclarativepackage.cpp')
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diff --git a/src/declarative/util/qdeclarativepackage.cpp b/src/declarative/util/qdeclarativepackage.cpp new file mode 100644 index 0000000..34ae466 --- /dev/null +++ b/src/declarative/util/qdeclarativepackage.cpp @@ -0,0 +1,194 @@ +/**************************************************************************** +** +** Copyright (C) 2010 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 "qdeclarativepackage_p.h" + +#include <private/qobject_p.h> +#include "private/qdeclarativeguard_p.h" + +QT_BEGIN_NAMESPACE + +/*! + \qmlclass Package QDeclarativePackage + \brief Package provides a collection of named items + + The Package class is currently used in conjunction with + VisualDataModel to enable delegates with a shared context + to be provided to multiple views. + + Any item within a Package may be assigned a name via the + \e {Package.name} attached property. + + The example below creates a Package containing two named items; + \e list and \e grid. The third element in the package is parented to whichever + delegate it should appear in. This allows an item to move + between views. + + \snippet examples/declarative/package/Delegate.qml 0 + + These named items are used as the delegates by the two views who + reference the special VisualDataModel.parts property to select + a model which provides the chosen delegate. + + \snippet examples/declarative/package/view.qml 0 + +*/ + + +class QDeclarativePackagePrivate : public QObjectPrivate +{ +public: + QDeclarativePackagePrivate() {} + + struct DataGuard : public QDeclarativeGuard<QObject> + { + DataGuard(QObject *obj, QList<DataGuard> *l) : list(l) { (QDeclarativeGuard<QObject>&)*this = obj; } + QList<DataGuard> *list; + void objectDestroyed(QObject *) { + // we assume priv will always be destroyed after objectDestroyed calls + list->removeOne(*this); + } + }; + + QList<DataGuard> dataList; + static void data_append(QDeclarativeListProperty<QObject> *prop, QObject *o) { + QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data); + list->append(DataGuard(o, list)); + } + static void data_clear(QDeclarativeListProperty<QObject> *prop) { + QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data); + list->clear(); + } + static QObject *data_at(QDeclarativeListProperty<QObject> *prop, int index) { + QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data); + return list->at(index); + } + static int data_count(QDeclarativeListProperty<QObject> *prop) { + QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data); + return list->count(); + } +}; + +QHash<QObject *, QDeclarativePackageAttached *> QDeclarativePackageAttached::attached; + +QDeclarativePackageAttached::QDeclarativePackageAttached(QObject *parent) +: QObject(parent) +{ + attached.insert(parent, this); +} + +QDeclarativePackageAttached::~QDeclarativePackageAttached() +{ + attached.remove(parent()); +} + +QString QDeclarativePackageAttached::name() const +{ + return _name; +} + +void QDeclarativePackageAttached::setName(const QString &n) +{ + _name = n; +} + +QDeclarativePackage::QDeclarativePackage(QObject *parent) + : QObject(*(new QDeclarativePackagePrivate), parent) +{ +} + +QDeclarativePackage::~QDeclarativePackage() +{ + Q_D(QDeclarativePackage); + for (int ii = 0; ii < d->dataList.count(); ++ii) { + QObject *obj = d->dataList.at(ii); + obj->setParent(this); + } +} + +QDeclarativeListProperty<QObject> QDeclarativePackage::data() +{ + Q_D(QDeclarativePackage); + return QDeclarativeListProperty<QObject>(this, &d->dataList, QDeclarativePackagePrivate::data_append, + QDeclarativePackagePrivate::data_count, + QDeclarativePackagePrivate::data_at, + QDeclarativePackagePrivate::data_clear); +} + +bool QDeclarativePackage::hasPart(const QString &name) +{ + Q_D(QDeclarativePackage); + for (int ii = 0; ii < d->dataList.count(); ++ii) { + QObject *obj = d->dataList.at(ii); + QDeclarativePackageAttached *a = QDeclarativePackageAttached::attached.value(obj); + if (a && a->name() == name) + return true; + } + return false; +} + +QObject *QDeclarativePackage::part(const QString &name) +{ + Q_D(QDeclarativePackage); + if (name.isEmpty() && !d->dataList.isEmpty()) + return d->dataList.at(0); + + for (int ii = 0; ii < d->dataList.count(); ++ii) { + QObject *obj = d->dataList.at(ii); + QDeclarativePackageAttached *a = QDeclarativePackageAttached::attached.value(obj); + if (a && a->name() == name) + return obj; + } + + if (name == QLatin1String("default") && !d->dataList.isEmpty()) + return d->dataList.at(0); + + return 0; +} + +QDeclarativePackageAttached *QDeclarativePackage::qmlAttachedProperties(QObject *o) +{ + return new QDeclarativePackageAttached(o); +} + + + +QT_END_NAMESPACE |