Archived:Converting time zones using Symbian C++

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Article Metadata

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Tested with

Devices(s): Nokia E61i
Nokia E90 Communicator
Nokia N95 8GB
Nokia 6220 Classic

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Compatibility

Platform(s): S60 3rd Edition
S60 3rd Edition, FP1
S60 3rd Edition, FP2 Beta

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Article

Keywords: TTime, RTz, CTzConverter, CTzId,TTime::UniversalTime(), TTime::FormatL(), CTzConverter::ConvertToLocalTime()

Created: tapiolaitinen (26 Feb 2008)

Last edited: lpvalente (04 Aug 2012)

Overview

This code snippet demonstrates how to convert the time between different time zones. The snippet demonstrates the following functionality:

• Displaying UTC time
• Converting UTC time to local time
• Converting UTC time to a specific time zone (Europe/Helsinki)

MMP file

The following libraries are required:

LIBRARY  tzclient.lib

Source file

#include <aknnotewrappers.h> // CEikonEnv::InfoWinL()
#include <tz.h>              // RTz, CTzId
#include <tzconverter.h>     // CTzConverter

TTime utcTime;
TTime time;
TBuf<100> buffer;
// Times are formatted according to the European standard with AM/PM marking.
// For example: 26/02/2008 1:07:03 pm
_LIT(KFormatTxt, "%/0%1%/1%2%/2%3%/3 %-B%:0%J%:1%T%:2%S%:3%+B");            
 
// ----------------------------------------------------------------------------
// Obtain the universal time (UTC), format it, and display it
utcTime.UniversalTime();
utcTime.FormatL(buffer, KFormatTxt);
_LIT(KUtc, "UTC time");
iEikonEnv->InfoWinL(buffer, KUtc);
 
// ----------------------------------------------------------------------------
// Connect to the time zone server
RTz tzServer;
User::LeaveIfError(tzServer.Connect());
CleanupClosePushL(tzServer);
 
// ----------------------------------------------------------------------------
// Create a time zone converter
CTzConverter* tzConverter = CTzConverter::NewL(tzServer);
CleanupStack::PushL(tzConverter);
 
// ----------------------------------------------------------------------------
// Convert from UTC to local time
time = utcTime;
tzConverter->ConvertToLocalTime(time);
 
// Format and display the local time
time.FormatL(buffer, KFormatTxt);
_LIT(KLocal, "Local time");
iEikonEnv->InfoWinL(buffer, KLocal);
 
// ----------------------------------------------------------------------------
// Create a time zone ID object for Europe/Helsinki (GMT+2)
_LIT8(KHelsinki, "Europe/Helsinki");
CTzId* tzId = CTzId::NewL(KHelsinki);
CleanupStack::PushL(tzId);
 
// Convert UTC time to local time for Europe/Helsinki
time = utcTime;
TInt results = tzConverter->ConvertToLocalTime(time, *tzId);
if (results == KErrNone)
    {
    // Conversion successful. Display the time.
    time.FormatL(buffer, KFormatTxt);
    _LIT(KLocalHelsinki, "Local time in Europe/Helsinki");
    iEikonEnv->InfoWinL(buffer, KLocalHelsinki);
    }
else
    {
    _LIT(KError, "Error while converting");
    _LIT(KErrorHeading, "Error");
    iEikonEnv->InfoWinL(KError, KErrorHeading);
    }
 
CleanupStack::PopAndDestroy(3); // tzId, tzConverter, tzServer

Postconditions

Several different time conversions are done.

See also

• List of all time zones