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<task id="GUID-E0D4EFAC-85E6-4EF6-B65C-1D1602E3A8FD" xml:lang="en"><title>Creating

a User-Defined Time Zone from an Existing Time Zone</title><prolog><metadata><keywords/></metadata></prolog><taskbody>

<context id="GUID-DC81EBEF-5CAC-418C-8269-1DC7D5F7DAEF">       <p>This tutorial

describes how a client uses <codeph>CTzUserData</codeph> to manage user data. <codeph>CTzLocalizer</codeph> enables

a client to get existing localized time zone names.  </p><p>The steps for

a client to create a user-defined TZ from an existing TZ are described in

the Procedure section. </p></context>

<steps id="GUID-4DD07DEC-6017-4237-BE46-1D69E5FBD744-GENID-1-12-1-12-1-1-8-1-5-1-7-1-2-2">

<step id="GUID-9A69E5AD-E938-4092-A8C2-CB65C37C8962-GENID-1-12-1-12-1-1-8-1-5-1-7-1-2-2-1"><cmd>Include the header

files that contain the <codeph>CTzLocalizer</codeph> and <codeph>CTzUserData</codeph> classes. </cmd>

</step>

<step id="GUID-B6450767-B3BA-4228-9622-86FFBEE0C570"><cmd>Include a numeric time zone ID. This is supplied by the UI layer. </cmd>

</step>

<step id="GUID-7CA9FBF8-53CB-42F7-B1B8-C5ED84D8B26C"><cmd>Get the localized TZ names for the existing time zone (specified

by the TZID) using <xref href="GUID-18853D2C-A730-38CD-AA3D-3B1F4E891950.dita#GUID-18853D2C-A730-38CD-AA3D-3B1F4E891950/GUID-447CD187-F8F6-3CD0-9928-3972C48DF79B"><apiname>CTzLocalizer::GetLocalizedTimeZoneL(TInt)</apiname></xref>.</cmd>

</step>

<step id="GUID-A788AC13-92D2-46AD-8701-94D18902519B"><cmd>Create a user-defined TZ names object using <xref href="GUID-C40593C4-D60C-39D5-8CB2-4B5D7BBE8ED4.dita#GUID-C40593C4-D60C-39D5-8CB2-4B5D7BBE8ED4/GUID-2E630EE3-1DDB-3F9D-A75B-2119E1B02EF8"><apiname>CTzUserNames::NewL()</apiname></xref>.</cmd>

</step>

<step id="GUID-CA6D706A-7AD6-4B9F-9D5E-CB1052915E29"><cmd>Connect to the TZ Server using <xref href="GUID-052221AD-916E-3E47-9510-AC0495A19A70.dita#GUID-052221AD-916E-3E47-9510-AC0495A19A70/GUID-375E314E-3B59-3722-AECA-1DC873507711"><apiname>RTz::Connect()</apiname></xref>.</cmd>

</step>

<step id="GUID-3F86505C-B032-4944-BAE5-947A3570036A"><cmd>Get all the TZ rules for the existing time zone using <xref href="GUID-052221AD-916E-3E47-9510-AC0495A19A70.dita#GUID-052221AD-916E-3E47-9510-AC0495A19A70/GUID-D7E83A8B-88DB-3A2E-B448-6BDB2123D1DE"><apiname>RTz::GetTimeZoneRulesL()</apiname></xref>. </cmd>

</step>

<step id="GUID-28FC7226-4AF4-4781-B2EE-B4CEAAE322EF"><cmd>Create the user-defined TZ using <xref href="GUID-1A53F535-96FC-387D-A02D-CAF8B1CEBCF1.dita#GUID-1A53F535-96FC-387D-A02D-CAF8B1CEBCF1/GUID-6D622414-0E99-39E6-8347-BC8CFD709D1D"><apiname>CTzUserData::CreateL()</apiname></xref>. </cmd>

</step>

</steps>

<example><p>This is illustrated in the code example that follows.</p><codeblock xml:space="preserve">#include &lt;tzlocalizer.h&gt; // For CTzLocalizer etc.

#include <tz.h> // For CTzUserData etc.

#include <…>

…

// This numeric TZID would typically be supplied by the UI layer.

TInt existingTzId = 1234;

// Get localized TZ names for existing TZ.

CTzLocalizer* tzLocalizer = CTzLocalizer::NewL();

CTzLocalizedTimeZone* localizedTz = tzLocalizer-> GetLocalizedTimeZoneL( existingTzId );

CTzLocalizedCity* localizedCity = tzLocalizer-> GetDefaultCityL( localizedTz );

CTzLocalizedCityGroup* localizedGroup = tzLocalizer-> GetCityGroupL( localizedCity->GroupId() );

// Create user-defined TZ names object.

CTzUserNames* tzNames = CTzUserNames::NewL( localizedTz->StandardName(),

                                            localizedTz->ShortStandardName(),

                                            localizedTz->DaylightName(),

                                            localizedTz->ShortDaylightName(),

                                            localizedCity->Name(),

                                            localizedGroup ->Name() );

// Connect to TZ Server.

RTz tzServer;

User::LeaveIfError( tzServer.Connect() );

// Get the TZ rules for the existing TZ.

CTzId* tzId = CTzId::NewL( existingTzId );

TTime startTime( TDateTime( 0,EJanuary,0,0,0,0,0 ) );       // Get all the

TTime endTime( TDateTime( 9999,EDecember,30,23,59,59,0 ) ); // TZ rules.

CTzRules* tzRules = tzServer.GetTimeZoneRulesL( *tzId,

                                                startTime,

                                                endTime,

                                                ETzUtcTimeReference );

// Create user-defined TZ.

CTzUserData* tzUserData = CTzUserData::NewL( tzServer );

CTzId* userTzId = tzUserData->CreateL( *tzRules, *tzNames );

…</codeblock></example>

</taskbody><related-links>

<link href="GUID-B92EB751-202D-4845-AF34-34DA7B36881F.dita"><linktext>Subscribe

and Respond to TZ Data Changes </linktext></link>

</related-links></task>