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/****************************************************************************
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**
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (developer.feedback@nokia.com)
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**
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** This file is part of the HbCore module of the UI Extensions for Mobile.
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**
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this file.
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** Please review the following information to ensure the GNU Lesser General
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** Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at developer.feedback@nokia.com.
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**
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****************************************************************************/
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#ifndef HBSTYLEVALUE_H
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#define HBSTYLEVALUE_H
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#include <QString>
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#include <QVariant>
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#include <hbicon.h>
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template<typename T>
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class HbStyleValue
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{
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public:
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HbStyleValue();
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~HbStyleValue();
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bool isSet() const;
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T value() const;
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operator T() const;
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void operator=(const T &value);
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bool operator!=(const T &value) const;
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bool operator==(const T &value) const;
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void clear();
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private:
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bool mSet;
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T mVal;
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};
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template<typename T>
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HbStyleValue<T>::HbStyleValue() : mSet(false)
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{
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}
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template<typename T>
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HbStyleValue<T>::~HbStyleValue()
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{
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}
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template<typename T>
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bool HbStyleValue<T>::isSet() const
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{
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return mSet;
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}
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template<typename T>
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T HbStyleValue<T>::value() const
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{
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Q_ASSERT(mSet);
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return mVal;
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}
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template<typename T>
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HbStyleValue<T>::operator T() const
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{
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Q_ASSERT(mSet);
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return mVal;
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}
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template<typename T>
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void HbStyleValue<T>::operator=(const T &value)
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{
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mVal = value;
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mSet = true;
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}
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template<typename T>
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void HbStyleValue<T>::clear()
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{
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mSet = false;
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}
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template<typename T>
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bool HbStyleValue<T>::operator!=(const T &value) const
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{
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if (!mSet) {
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return true;
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}
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return mVal!=value;
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}
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template<typename T>
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bool HbStyleValue<T>::operator==(const T &value) const
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{
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return !(*this!=value);
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}
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template<typename T>
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bool operator!=(const T &value, const HbStyleValue<T> &other)
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{
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return other!=value;
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}
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template<typename T>
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inline bool operator==(const T &value, const HbStyleValue<T> &other)
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{
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return !(other!=value);
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}
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template<>
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inline void HbStyleValue<QString>::clear()
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{
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mSet = false;
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mVal.clear();
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}
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template<>
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inline void HbStyleValue<QVariant>::clear()
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{
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mSet = false;
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mVal.clear();
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}
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template<>
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inline void HbStyleValue<HbIcon>::clear()
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{
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mSet = false;
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mVal.clear();
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}
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#endif // HBSTYLEVALUE_H
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