src/hbcore/theme/hbtheme.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 23 Jun 2010 18:33:25 +0300
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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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#include "hbtheme.h"
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#include "hbtheme_p.h"
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#include "hbthemeclient_p.h"
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#include "hbicontheme_p.h"
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#include "hbthemeutils_p.h"
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#include "hbiconloader_p.h"
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#include "hbeffecttheme_p.h"
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#include "hbeffectinternal_p.h"
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#include "hbthemeindex_p.h"
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#include <QSettings>
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/*!
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    @stable
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    @hbcore
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    \class HbTheme
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    \brief HbTheme provides means for retrieving information of the currently active theme.
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    HbTheme is a part of hbinstance, which is accessed with the method hbinstance->theme().
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    In addition, it provides two signals for handling a theme change event.
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    More information about theming see S60QtProgrammersGuide.
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*/
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/*!
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    \fn void HbTheme::changed()
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    This signal is emitted when the theme change has started.
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    Components using resources such as pixmaps from a theme should make sure that
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    they are updated upon this signal. 
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    Classes HbIcon and HbIconItem handle this automatically
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    and if icons has no special size, position etc. widgets or applications don't need 
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    to connect to this signal, icons are changed automatically.
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*/
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/*!
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    \fn void HbTheme::changeFinished()
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    This signal is emitted when theme change has finished and screen update is 
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    required.
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    It can be assumed that when this signal is emitted, components are already
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    using resources (e.g. pixmaps) from the new theme.
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    HbInstance updates the graphics scenes upon this signal.
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*/
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/*!
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    Returns static instance
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 */
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HbTheme *HbTheme::instance()
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{
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    static HbTheme theInstance;
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    return &theInstance;
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}
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/*!
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    Returns the non localized name of the currently active theme.
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*/
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QString HbTheme::name() const
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{
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    return d_ptr->iconTheme.name();
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}
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/*!
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    Returns the non localized description of the currently active theme.
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*/
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QString HbTheme::description() const
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{
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    return d_ptr->iconTheme.description();
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}
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/*!
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    Returns the color for definition \a colorRole
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 */
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QColor HbTheme::color(const QString &colorRole) const
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{
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    HbThemeIndexResource resource(colorRole);
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    if (resource.isValid()) {
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        return resource.colorValue();
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    }
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    return QColor();
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}
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/*!
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    Constructor
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*/
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HbTheme::HbTheme() : d_ptr(new HbThemePrivate) 
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{
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    d_ptr->q_ptr = this;
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   115
    d_ptr->fetchCurrentThemeFromSettings();
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    d_ptr->handleThemeChange();
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}
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   118
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/*!
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    Destructor
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   121
*/
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HbTheme::~HbTheme()
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{
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    delete d_ptr;
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}
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   126
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/*!
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    C'tor
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*/
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HbThemePrivate::HbThemePrivate()
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{
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    // Condition added to check if the client itself is server.
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    if(THEME_SERVER_NAME != HbMemoryUtils::getCleanAppName()) {
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        if(!HbThemeClient::global()->connectToServer()) {
3
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            qWarning() << "ThemeClient unable to connect to server in HbThemePrivate::HbThemePrivate.";
0
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        }
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    }
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}
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   139
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/*!
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   141
    D'tor
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   142
*/
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   143
HbThemePrivate::~HbThemePrivate()
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{
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    HbThemeClient::releaseInstance();
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    GET_MEMORY_MANAGER( HbMemoryManager::HeapMemory )
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    if (manager) {
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        manager->releaseInstance(HbMemoryManager::HeapMemory);
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    }
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}
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   151
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   152
/*!
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    Retrieves the current theme from setting
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   154
*/
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void HbThemePrivate::fetchCurrentThemeFromSettings()
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{
5
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    HbThemeIndexInfo info = HbThemeUtils::getThemeIndexInfo(ActiveTheme);
6
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   158
    if (info.address) {
5
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        currentTheme = info.name;
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        return;
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    }
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   162
    
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   163
    // Fallback to settings
1
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   164
    currentTheme = HbThemeUtils::getThemeSetting(HbThemeUtils::CurrentThemeSetting);
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   165
    if (currentTheme.trimmed().isEmpty()){
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        currentTheme = HbThemeUtils::defaultTheme().name;
0
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    }
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}
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   169
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   170
/*!
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   171
    Handles theme-change request
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   172
*/
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   173
void HbThemePrivate::handleThemeChange(const QString &str)
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   174
{
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    Q_Q(HbTheme);
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   176
    QString newTheme;
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   177
    if (str.isEmpty()) {
5
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   178
        HbThemeIndexInfo info = HbThemeUtils::getThemeIndexInfo(ActiveTheme);
6
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   179
        if (info.address) {
5
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            newTheme = info.name;
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   181
        } else {
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   182
            newTheme = HbThemeUtils::getThemeSetting(HbThemeUtils::CurrentThemeSetting);
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   183
        }
0
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   184
    } else {
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        newTheme = str;
5
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   186
        // Update the new currentTheme to local settings in HbThemeUtils.
1
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   187
        HbThemeUtils::updateThemeSetting(HbThemeUtils::CurrentThemeSetting, newTheme);
0
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   188
    }
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   189
1
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   190
    iconTheme.setCurrentTheme(newTheme);
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   191
    HbEffectTheme::instance()->setCurrentTheme(newTheme);
0
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   192
    
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   193
    // The server sends the signal only if the theme is changed from the previous theme
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   194
    // Hence here, we need not check whether the theme differs from currentTheme or not.
5
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   195
    currentTheme = newTheme;
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   196
    // This should be used to replace pixmaps from the old theme with the pixmaps from the new theme
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   197
    // In application side this is needed only when icon size can be different in different theme.
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   198
    iconTheme.emitUpdateIcons();
1
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diff changeset
   199
5
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   200
    emit q->changed();
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   201
    // This signal should be used to update the screen after the theme change - it's handled by HbInstance.
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   202
    emit q->changeFinished();
0
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   203
}
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   204
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   205
/*!
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   206
    Clears the contents to reload new css files
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   207
*/
1
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   208
void HbThemePrivate::updateTheme(const QStringList &updatedFiles)
0
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   209
{
1
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   210
    // Reload effects
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   211
    HbEffectInternal::reloadFxmlFiles();
0
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   212
1
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   213
    iconTheme.emitUpdateIcons(updatedFiles);
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diff changeset
   214
0
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   215
    Q_Q(HbTheme);
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   216
    // Emit the theme changed signals so that the UI is refreshed.
1
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   217
    // Icons will updated if needed
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   218
    emit q->changed();
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diff changeset
   219
0
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   220
    emit q->changeFinished();
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   221
}