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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qfxcomponentinstance.h"
#include "qfxcomponentinstance_p.h"
#include <qfxperf.h>
#include <qfxcontentwrapper.h>
#include <QtDeclarative/qmlinfo.h>
QT_BEGIN_NAMESPACE
QML_DEFINE_TYPE(QFxComponentInstance,ComponentInstance);
/*!
\internal
\class QFxComponentInstance
\qmlclass ComponentInstance
\brief The QFxComponentInstance class provides a way to instantiate an item from a component.
*/
/*!
\qmlclass ComponentInstance QFxComponentInstance
\brief The ComponentInstance element allows you to instantiate an arbitrary component.
\code
<Item>
<Component id="RedSquare">
<Rect color="red" width="10" height="10"/>
</Component>
<ComponentInstance component="{RedSquare}"/>
</Item>
\endcode
*/
QFxComponentInstance::QFxComponentInstance(QFxItem *parent)
: QFxItem(*(new QFxComponentInstancePrivate), parent)
{
setOptions(IsFocusRealm);
}
QFxComponentInstance::QFxComponentInstance(QFxComponentInstancePrivate &dd, QFxItem *parent)
: QFxItem(dd, parent)
{
setOptions(IsFocusRealm);
}
/*!
\qmlproperty Component QFxComponentInstance::component
This property holds the component to instantiate.
*/
QmlComponent *QFxComponentInstance::component() const
{
Q_D(const QFxComponentInstance);
return d->component;
}
void QFxComponentInstance::setComponent(QmlComponent *c)
{
Q_D(QFxComponentInstance);
if (d->component) {
qmlInfo(this) << "component is a write-once property.";
return;
}
d->component = c;
create();
}
void QFxComponentInstance::create()
{
Q_D(QFxComponentInstance);
if (d->component) {
QObject *obj= d->component->create(qmlContext(this));
if (obj) {
QFxItem *objitem = qobject_cast<QFxItem *>(obj);
if (objitem) {
d->instance = objitem;
objitem->setItemParent(this);
objitem->setFocus(true);
connect(objitem, SIGNAL(widthChanged()), this, SLOT(updateSize()));
connect(objitem, SIGNAL(heightChanged()), this, SLOT(updateSize()));
updateSize();
emit instanceChanged();
} else {
delete obj;
}
}
}
}
void QFxComponentInstance::updateSize()
{
QFxItem *i = instance();
if (i) {
if (!widthValid())
setImplicitWidth(i->width());
if (!heightValid())
setImplicitHeight(i->height());
}
}
/*!
\qmlproperty Item QFxComponentInstance::instance
This property holds the instantiated component.
*/
QFxItem *QFxComponentInstance::instance() const
{
Q_D(const QFxComponentInstance);
return d->instance;
}
QT_END_NAMESPACE
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