author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:03:46 +0300 | |
branch | RCL_3 |
changeset 53 | 61bc0f252b2b |
permissions | -rw-r--r-- |
53
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/* |
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* Copyright (c) 2009-2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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/* |
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* cxesettings.h |
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* |
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* Created on: Dec 30, 2008 |
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* |
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*/ |
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#ifndef CXESETTINGS_H_ |
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#define CXESETTINGS_H_ |
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#include <QObject> |
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#include <QString> |
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#include <QVariant> |
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|
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#include "cxeerror.h" |
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#include "cxenamespace.h" |
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#include "cxeexception.h" |
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/*! |
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* Class to access all kind of Camera Settings |
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* |
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* There are templated get() and set() methods for accessing and modifying settings. |
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* Supported types are int, qreal, QString, QVariantMap and enums. |
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* |
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* It is possible to monitor changes in settings, either by connecting to settingValueChanged() signal |
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* or registering a slot as listener to a specific setting using listenForSetting(). With the latter |
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* method you will only be notified of the change in the requested setting, as opposed to the settingValueChanged() |
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* which will be emitted for any setting change. |
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*/ |
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class CxeSettings : public QObject |
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{ |
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Q_OBJECT |
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public: |
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/*! |
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* Returns value of external setting item which is not owned by camera |
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*/ |
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virtual void get(long int uid, |
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unsigned long int key, |
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Cxe::SettingKeyType type, |
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QVariant &value) const = 0; |
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|
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/*! |
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* Get a value of a certain setting. Template method that can be used |
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* with any enumeration (well actually, anything that can be cast to from int), |
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* int, QString and QVariantMap. Will throw CxeException in case of error. |
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* |
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* An example: |
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* \code |
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* try { |
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* Cxe::Whitebalance wb = settings.get<Cxe::Whitebalance>(CxeSettingIds::WHITE_BALANCE); |
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* catch (CxeException &e) { |
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* CX_DEBUG(("Error getting white balance")); |
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* } |
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* \endcode |
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* @param settingId Setting key |
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* @return Setting value |
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*/ |
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template<typename T> |
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inline T get(const QString &key) const { |
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QVariant v; |
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getValue(key, v); |
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return (T)v.value<int>(); |
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} |
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|
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/*! |
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* Same as above but with default value in case of error. No exceptions are thrown. |
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* |
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*An example: |
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* \code |
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* |
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* Cxe::Whitebalance wb = settings.get<Cxe::Whitebalance>(CxeSettingIds::WHITE_BALANCE, Cxe::WhitebalanceAutomatic); |
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* |
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* \endcode |
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* @param key Setting key |
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* @param defaultValue Default value returned in case of error |
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* @return Value of the setting |
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*/ |
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template<typename T> |
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inline T get(const QString &key, const T &defaultValue) const { |
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try { |
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return get<T>(key); |
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} catch (CxeException &e) { |
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return defaultValue; |
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} |
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} |
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/*! |
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* Set a value of a certain setting. Template method that can be used |
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* with any enumeration (well actually, anything that can be cast to from int), |
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* int, QString and QVariantMap. |
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* |
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* An example: |
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* \code |
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* try { |
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* Cxe::Whitebalance wb = Cxe::WhiteBalanceAutomatic; |
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* settings.get<Cxe::Whitebalance>(CxeSettingIds::WHITE_BALANCE, wb); |
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* catch (CxeException &e) { |
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* CX_DEBUG(("Error setting white balance")); |
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* } |
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* \endcode |
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* @param settingId Setting key |
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* @param value Setting value |
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*/ |
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template<typename T> |
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inline void set(const QString &key, const T &value) { |
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QVariant v; |
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v.setValue((int)value); |
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setValue(key, v); |
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} |
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/*! |
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* Resets settings to default values. |
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*/ |
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virtual void reset() = 0; |
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/*! |
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* Get value of variation setting. |
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*/ |
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virtual CxeError::Id getVariationValue(const QString &key, QVariant &value) = 0; |
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/*! |
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* Add listener for changes in one setting. When the value of the setting changes, the given |
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* slot is invoked on given object. |
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* |
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* @param settingKey Setting to listen to |
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* @param target Object that the slot will be invoked for |
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* @param slot Slot that will be invoked. The slot can have either of these two signatures: |
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* slotName(const QVariant&) only new value of setting is passed as parameter |
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* slotName(const QString&, const QVariant&) both setting key and new value are passed as parameter |
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* @return boolean to indicate success |
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*/ |
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virtual bool listenForSetting(const QString &settingKey, QObject *target, const char *slot) = 0; |
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protected: |
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/*! |
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* returns the setting as QVariant |
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*/ |
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virtual void getValue(const QString &key, QVariant &value) const = 0; |
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/*! |
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* Set new value for the given key |
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*/ |
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virtual void setValue(const QString &key, const QVariant &newValue) = 0; |
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signals: |
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/*! |
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* to notify engine and ui components for a change in a setting value |
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*/ |
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void settingValueChanged(const QString &key, QVariant newValue); |
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/*! |
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* to notify engine and ui components for a change in a setting value |
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*/ |
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void settingValueChanged(long int uid, unsigned long int key, QVariant value); |
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protected: |
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CxeSettings() {} |
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private: |
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Q_DISABLE_COPY( CxeSettings ) |
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}; |
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// include set/get function specializations |
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#include "cxesettings.inl" |
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#endif /*CXESETTINGS_H_*/ |
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// end of file |