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/****************************************************************************
**
** 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
|
