diff -r 4e8ebe173323 -r 23b5d6a29cce homescreenapp/widgetplugins/hsclockwidgetplugin/src/hsclocksettingsnotifier_symbian.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/homescreenapp/widgetplugins/hsclockwidgetplugin/src/hsclocksettingsnotifier_symbian.cpp	Fri May 14 15:43:04 2010 +0300
@@ -0,0 +1,147 @@
+/*
+* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Clock widget
+*
+*/
+
+#include <QTimer>
+#include "hsclocksettingsnotifier_symbian.h"
+
+#include <bacntf.h> // CEnvironmentChangeNotifier
+
+
+namespace
+{
+    const char ANALOG[] = "analog";
+    const char DIGITAL[] = "digital";
+    const char TIME12[] = "TIME12";
+    const char TIME24[] = "TIME24";
+}
+
+/*!
+    \class HsClockSettingsNotifierType
+    \ingroup group_HsClockSettingsNotifierplugin
+    \brief Implementation for the observation of the system clock settings (analog/digital). 
+
+*/
+
+
+/*!
+    Constructor
+*/
+HsClockSettingsNotifier::HsClockSettingsNotifier(QObject *parent)
+    : QObject(parent),
+      mDateTimeNotifier(0)
+{
+    mClockFormat = clockFormatString();
+    mTimeFormat = timeFormatString();
+    createObserver();
+}
+
+
+
+/*!
+    Destructor.
+*/
+HsClockSettingsNotifier::~HsClockSettingsNotifier()
+{
+    delete mDateTimeNotifier;
+}
+
+/*!
+    Returns the clock format ('analog'/'digital')
+*/
+QString HsClockSettingsNotifier::clockFormat() const
+{
+    return mClockFormat;
+}
+
+/*!
+    Returns the time format ('12'/'24')
+*/
+QString HsClockSettingsNotifier::timeFormat() const
+{
+    return mTimeFormat;
+}
+
+/*!
+    Callback function to receive system settings changes.
+*/
+TInt HsClockSettingsNotifier::EnvironmentChanged( TAny* aSelf )
+{
+    HsClockSettingsNotifier* self = static_cast<HsClockSettingsNotifier*>(aSelf);
+    if ( self ){
+        TInt change = self->mDateTimeNotifier->Change();
+        if ( change & EChangesLocale ) {
+            self->onSettingsChanged();
+        }
+    }
+    return KErrNone;        
+}
+
+/*!
+ Creates CEnvironmentChangeNotifier object to listen system settings changes.
+*/
+void HsClockSettingsNotifier::createObserver() 
+{
+    if ( !mDateTimeNotifier ){
+        mDateTimeNotifier = CEnvironmentChangeNotifier::NewL( 
+            CActive::EPriorityLow,
+            TCallBack( EnvironmentChanged, this ) );
+        
+        mDateTimeNotifier->Start();            
+    }
+}   
+
+/*!
+    Reads clock format from system locale settings
+*/
+QString HsClockSettingsNotifier::clockFormatString() const
+{
+    TLocale locale;
+    TClockFormat clockFormat = locale.ClockFormat();
+    if ( clockFormat==EClockAnalog ) {
+        return QString(ANALOG);
+    } else {
+        return QString(DIGITAL);
+    }
+}
+
+/*!
+    Reads time format from system locale settings
+*/
+QString HsClockSettingsNotifier::timeFormatString() const
+{
+    TLocale locale;
+    TTimeFormat timeFormat = locale.TimeFormat();
+    if ( timeFormat==ETime12 ) {
+        return QString(TIME12);
+    } else {
+        return QString(TIME24);
+    }
+}
+
+/*!
+*/
+void HsClockSettingsNotifier::onSettingsChanged()
+{
+    QString clockFormat = clockFormatString();
+    QString timeFormat = timeFormatString();
+    if ( clockFormat != mClockFormat || timeFormat != mTimeFormat ) {
+        mClockFormat = clockFormat;
+        mTimeFormat = timeFormat;
+        emit settingsChanged(mClockFormat, mTimeFormat);
+    }
+}
+