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Diffstat (limited to 'src/declarative/util/qmlsetproperties.cpp')
| -rw-r--r-- | src/declarative/util/qmlsetproperties.cpp | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/src/declarative/util/qmlsetproperties.cpp b/src/declarative/util/qmlsetproperties.cpp new file mode 100644 index 0000000..f385391 --- /dev/null +++ b/src/declarative/util/qmlsetproperties.cpp @@ -0,0 +1,247 @@ +/**************************************************************************** +** +** 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 "private/qobject_p.h" +#include "qmlopenmetaobject.h" +#include "qmlsetproperties.h" +#include <QtCore/qdebug.h> +#include <QtDeclarative/qmlinfo.h> + + +QT_BEGIN_NAMESPACE +class QmlSetPropertiesMetaObject : public QmlOpenMetaObject +{ +public: + QmlSetPropertiesMetaObject(QObject *); + +protected: + virtual void propertyRead(int); + virtual void propertyWrite(int); +}; + +class QmlSetPropertiesProxyObject : public QObject +{ +Q_OBJECT +public: + QmlSetPropertiesProxyObject(QObject *); + + QmlSetPropertiesMetaObject *fxMetaObject() const { return _mo; } +private: + QmlSetPropertiesMetaObject *_mo; +}; + +QmlSetPropertiesProxyObject::QmlSetPropertiesProxyObject(QObject *parent) +: QObject(parent), _mo(new QmlSetPropertiesMetaObject(this)) +{ +} + +QmlSetPropertiesMetaObject::QmlSetPropertiesMetaObject(QObject *obj) +: QmlOpenMetaObject(obj) +{ +} + +void QmlSetPropertiesMetaObject::propertyRead(int id) +{ + if(!value(id).isValid()) + setValue(id, QVariant::fromValue((QObject *)new QmlSetPropertiesProxyObject(object()))); + + QmlOpenMetaObject::propertyRead(id); +} + +void QmlSetPropertiesMetaObject::propertyWrite(int id) +{ + if(value(id).userType() == qMetaTypeId<QObject *>()) { + QObject *val = qvariant_cast<QObject *>(value(id)); + QmlSetPropertiesProxyObject *proxy = qobject_cast<QmlSetPropertiesProxyObject *>(val); + if(proxy) { + setValue(id, QVariant()); + delete proxy; + } + } + QmlOpenMetaObject::propertyWrite(id); +} + +/*! + \qmlclass SetProperties QmlSetProperties + \brief The SetProperties element describes new property values for a state. + + SetProperties is a convenience element for changing many properties on a single + object. It allows you to specify the property names and values similar to how + you normally would specify them for the actual item: + + \code + <SetProperties target="{myRect}" x="52" y="300" width="48"/> + \endcode + + \c target is a property of \c SetProperties, so if the property you want to change + is named \e target you will have to use \l SetProperty instead. You should also + use \l SetProperty if you want to update the binding for a property, + as SetProperties does not support this. +*/ + +/*! + \internal + \class QmlSetProperties + \brief The QmlSetProperties class describes new property values for a state. + + \ingroup states + + QmlSetProperties is a convenience class for changing many properties on a single + object. It allows you to specify the property names and values similar to how + you normally would specify them for the actual item: + + \code + <SetProperties target="{myRect}" x="52" y="300" width="48"/> + \endcode + + \c target is a property of \c SetProperties, so if the property you want to change + is named \e target you will have to use QmlSetProperty instead. You should also use QmlSetProperty + if you want to update the binding for a property, as QmlSetProperties does not support this. + + \sa QmlSetProperty +*/ + +class QmlSetPropertiesPrivate : public QObjectPrivate +{ +public: + QmlSetPropertiesPrivate() : obj(0), mo(0) {} + + QObject *obj; + QmlSetPropertiesMetaObject *mo; +}; + +QML_DEFINE_TYPE(QmlSetProperties,SetProperties); +QmlSetProperties::QmlSetProperties() + : QmlStateOperation(*(new QmlSetPropertiesPrivate)) +{ + Q_D(QmlSetProperties); + d->mo = new QmlSetPropertiesMetaObject(this); +} + +QmlSetProperties::QmlSetProperties(QObject *parent) + : QmlStateOperation(*(new QmlSetPropertiesPrivate), parent) +{ + Q_D(QmlSetProperties); + d->mo = new QmlSetPropertiesMetaObject(this); +} + +QmlSetProperties::~QmlSetProperties() +{ +} + +/*! + \qmlproperty Object SetProperties::target + This property holds the object that the properties to change belong to +*/ + +/*! + \property QmlSetProperties::target + \brief the object that the properties to change belong to +*/ +QObject *QmlSetProperties::object() +{ + Q_D(QmlSetProperties); + return d->obj; +} + +void QmlSetProperties::setObject(QObject *o) +{ + Q_D(QmlSetProperties); + d->obj = o; +} + +QmlSetProperties::ActionList +QmlSetProperties::doAction(QmlSetPropertiesMetaObject *metaObject, + QObject *object) +{ + ActionList list; + + for (int ii = 0; ii < metaObject->count(); ++ii) { + + QByteArray name = metaObject->name(ii); + QVariant value = metaObject->value(ii); + + QmlSetPropertiesProxyObject *po = qobject_cast<QmlSetPropertiesProxyObject *>(qvariant_cast<QObject *>(value)); + + QmlMetaProperty prop(object, QLatin1String(name)); + + if(po) { + QObject *objVal = QmlMetaType::toQObject(prop.read()); + if(!objVal) { + qmlInfo(this) << object->metaObject()->className() + << "has no object property named" << name; + continue; + } + + list << doAction(po->fxMetaObject(), objVal); + } else if (!prop.isValid()) { + qmlInfo(this) << object->metaObject()->className() + << "has no property named" << name; + continue; + } else if (!prop.isWritable()) { + qmlInfo(this) << object->metaObject()->className() + << name << "is not writable, and cannot be set."; + continue; + } else { + //append action + Action a; + a.property = prop; + a.fromValue = prop.read(); + a.toValue = value; + + list << a; + } + } + + return list; +} + +QmlSetProperties::ActionList QmlSetProperties::actions() +{ + Q_D(QmlSetProperties); + if (!d->obj) + return ActionList(); + + return doAction(d->mo, d->obj); +} + +QT_END_NAMESPACE +#include "qmlsetproperties.moc" |