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Diffstat (limited to 'src/declarative/fx/qfxcomponentinstance.cpp')
| -rw-r--r-- | src/declarative/fx/qfxcomponentinstance.cpp | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/declarative/fx/qfxcomponentinstance.cpp b/src/declarative/fx/qfxcomponentinstance.cpp new file mode 100644 index 0000000..472b98b --- /dev/null +++ b/src/declarative/fx/qfxcomponentinstance.cpp @@ -0,0 +1,152 @@ +/**************************************************************************** +** +** 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 ComponentInstance + + \brief The QFxComponentInstance class provides a way to instantiate an item from a component. + */ + +/*! + \qmlclass ComponentInstance QFxComponentInstance + \brief The ComponentInstance item allows you to instantiate a \l{Component}. + + \qml + Item { + Component { + id: RedSquare + Rect { color: "red"; width: 10; height: 10 } + } + + ComponentInstance { component: RedSquare } + } + \endqml +*/ +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 |