Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_t_z_example_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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<h1>examples/AppServices/timezoneconversion/TZExample.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
<a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span>
<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
<a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
<a name="l00010"></a>00010 <span class="comment">//</span>
<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Description:</span>
<a name="l00014"></a>00014 <span class="comment">// This example demonstrates using the time zone server (RTz) </span>
<a name="l00015"></a>00015 <span class="comment">// to convert a local time to UTC time, then to convert the current </span>
<a name="l00016"></a>00016 <span class="comment">// time for one time zone to another time zone, </span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include <e32base.h></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <e32cons.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <tz.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <tzconverter.h></span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="comment">// Local definitions </span>
<a name="l00025"></a>00025 <span class="keyword">static</span> CConsoleBase* console;
<a name="l00026"></a>00026 <span class="keyword">static</span> RTz tzServer;
<a name="l00027"></a>00027 <span class="comment">// Date/time format string</span>
<a name="l00028"></a>00028 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KDateTimeString, <span class="stringliteral">"%*E%*D%X%*N%*Y %1 %2 '%3 %H%:1%T%:2%S"</span>);
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="comment">// length of string to hold the date/time for display</span>
<a name="l00031"></a>00031 <span class="keyword">static</span> <span class="keyword">const</span> TInt KMaxDateTimeStringLength = 30;
<a name="l00032"></a>00032 <span class="comment">// string to hold the date/time for display</span>
<a name="l00033"></a>00033 <span class="keyword">static</span> TBuf<KMaxDateTimeStringLength> dateTimeString;
<a name="l00034"></a>00034 <span class="comment">// length of string to hold the time zone for display</span>
<a name="l00035"></a>00035 <span class="keyword">const</span> TInt KMaxTimeZoneStringLength = 20;
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="comment">// converts a UTC time to local time</span>
<a name="l00038"></a>00038 <span class="keyword">static</span> <span class="keywordtype">void</span> ConvertUtcToLocalTimeL()
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 <span class="comment">// randomly choose a historical utc date/time, format it and print it out</span>
<a name="l00041"></a>00041 TTime time(TDateTime(2001,EJuly,20,10,0,0,0));
<a name="l00042"></a>00042 time.FormatL(dateTimeString, KDateTimeString);
<a name="l00043"></a>00043 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConsoleMessage,<span class="stringliteral">"\n A random date / time in UTC is %S"</span>);
<a name="l00044"></a>00044 console->Printf(KConsoleMessage,&dateTimeString);
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="comment">// now convert the date/time to local time for Australia/Sydney time zone</span>
<a name="l00047"></a>00047 _LIT8(KAustraliaSydney,<span class="stringliteral">"Australia/Sydney"</span>);
<a name="l00048"></a>00048 CTzId* timezoneId = CTzId::NewL(KAustraliaSydney);
<a name="l00049"></a>00049 CleanupStack::PushL(timezoneId);
<a name="l00050"></a>00050
<a name="l00051"></a>00051 TInt results=tzServer.ConvertToLocalTime(time,*timezoneId);
<a name="l00052"></a>00052 <span class="keywordflow">if</span>(results == KErrNone)
<a name="l00053"></a>00053 <span class="comment">// conversion successful</span>
<a name="l00054"></a>00054 {
<a name="l00055"></a>00055 TBuf<KMaxTimeZoneStringLength> timeZoneString;
<a name="l00056"></a>00056 timeZoneString.Copy(timezoneId->TimeZoneNameID());
<a name="l00057"></a>00057 time.FormatL(dateTimeString, KDateTimeString);
<a name="l00058"></a>00058 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConsoleMessage1,<span class="stringliteral">"\n The date and time in the %S time zone is %S"</span>);
<a name="l00059"></a>00059 console->Printf(KConsoleMessage1,&timeZoneString, &dateTimeString);
<a name="l00060"></a>00060 }
<a name="l00061"></a>00061 <span class="keywordflow">else</span>
<a name="l00062"></a>00062 {
<a name="l00063"></a>00063 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConsoleMessage2,<span class="stringliteral">"\n Error %d while converting "</span>);
<a name="l00064"></a>00064 console->Printf(KConsoleMessage2, results);
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066 CleanupStack::PopAndDestroy(timezoneId);
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">// convert the current local time for the system time zone </span>
<a name="l00070"></a>00070 <span class="comment">// to local time for another time zone.</span>
<a name="l00071"></a>00071 <span class="keyword">static</span> <span class="keywordtype">void</span> ConvertLocalToLocalTimeL()
<a name="l00072"></a>00072 {
<a name="l00073"></a>00073 <span class="comment">// first, get the current local time, format it and print it out</span>
<a name="l00074"></a>00074 TTime time;
<a name="l00075"></a>00075 time.HomeTime();
<a name="l00076"></a>00076 time.FormatL(dateTimeString, KDateTimeString);
<a name="l00077"></a>00077 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConsoleMessage3,<span class="stringliteral">"\n\n The current local time is %S"</span>);
<a name="l00078"></a>00078 console->Printf(KConsoleMessage3,&dateTimeString);
<a name="l00079"></a>00079 <span class="comment">// this is a 2 stage process - first convert the date/time to UTC.</span>
<a name="l00080"></a>00080 <span class="comment">// No need to specify the time zone because </span>
<a name="l00081"></a>00081 <span class="comment">// this function uses the current system time zone.</span>
<a name="l00082"></a>00082 TInt results=tzServer.ConvertToUniversalTime(time);
<a name="l00083"></a>00083 <span class="keywordflow">if</span>(results == KErrNone)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 <span class="comment">//conversion successful</span>
<a name="l00086"></a>00086 time.FormatL(dateTimeString, KDateTimeString);
<a name="l00087"></a>00087 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConsoleMessage4,<span class="stringliteral">"\n The current UTC time is %S"</span>);
<a name="l00088"></a>00088 console->Printf(KConsoleMessage4, &dateTimeString);
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090 <span class="keywordflow">else</span>
<a name="l00091"></a>00091 {
<a name="l00092"></a>00092 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConsoleMessage5,<span class="stringliteral">"\n Error %d while converting "</span>);
<a name="l00093"></a>00093 console->Printf(KConsoleMessage5, results);
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095
<a name="l00096"></a>00096 _LIT8(KAustraliaSydney,<span class="stringliteral">"Australia/Sydney"</span>);
<a name="l00097"></a>00097 <span class="comment">// create a timezone ID object</span>
<a name="l00098"></a>00098 CTzId* timezoneId = CTzId::NewL(KAustraliaSydney);
<a name="l00099"></a>00099 CleanupStack::PushL(timezoneId);
<a name="l00100"></a>00100 <span class="comment">// convert UTC time to local time for Australia/Sydney</span>
<a name="l00101"></a>00101 results=tzServer.ConvertToLocalTime(time,*timezoneId);
<a name="l00102"></a>00102 <span class="keywordflow">if</span>(results == KErrNone)
<a name="l00103"></a>00103 <span class="comment">// conversion successful</span>
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 TBuf<KMaxTimeZoneStringLength> timeZoneString;
<a name="l00106"></a>00106 timeZoneString.Copy(timezoneId->TimeZoneNameID());
<a name="l00107"></a>00107 time.FormatL(dateTimeString, KDateTimeString);
<a name="l00108"></a>00108 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConsoleMessage6,<span class="stringliteral">"\n The current date and time in the %S time zone is %S"</span>);
<a name="l00109"></a>00109 console->Printf(KConsoleMessage6,&timeZoneString, &dateTimeString);
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111 <span class="keywordflow">else</span>
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConsoleMessage7,<span class="stringliteral">"\n Error %d while converting "</span>);
<a name="l00114"></a>00114 console->Printf(KConsoleMessage7, results);
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116 CleanupStack::PopAndDestroy(timezoneId);
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="keyword">static</span> <span class="keywordtype">void</span> ConvertTimeL()
<a name="l00120"></a>00120 <span class="comment">// Connects to the time zone server and does the conversion</span>
<a name="l00121"></a>00121 {
<a name="l00122"></a>00122 User::LeaveIfError(tzServer.Connect());
<a name="l00123"></a>00123 CleanupClosePushL(tzServer);
<a name="l00124"></a>00124 <span class="comment">//do the conversions</span>
<a name="l00125"></a>00125 ConvertUtcToLocalTimeL();
<a name="l00126"></a>00126 ConvertLocalToLocalTimeL();
<a name="l00127"></a>00127 CleanupStack::PopAndDestroy(1); <span class="comment">// causes tzServer.Close() to be called</span>
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="keyword">static</span> <span class="keywordtype">void</span> DoExampleL()
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtConsoleTitle, <span class="stringliteral">"Time Zone example"</span>);
<a name="l00133"></a>00133 <span class="comment">// Create the console object to print the messages. </span>
<a name="l00134"></a>00134 console = Console::NewL(KTxtConsoleTitle,TSize(KConsFullScreen,KConsFullScreen));
<a name="l00135"></a>00135 CleanupStack::PushL(console);
<a name="l00136"></a>00136 TRAPD(err,ConvertTimeL());
<a name="l00137"></a>00137 <span class="keywordflow">if</span> (err)
<a name="l00138"></a>00138 {
<a name="l00139"></a>00139 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFailed,<span class="stringliteral">"\n\nConversion failed: leave code=%d"</span>);
<a name="l00140"></a>00140 console->Printf(KFailed, err);
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142 <span class="comment">// wait for user to press a key before destroying console</span>
<a name="l00143"></a>00143 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgPressAnyKey,<span class="stringliteral">"\n\nPress any key to continue\n\n"</span>);
<a name="l00144"></a>00144 console->Printf(KMsgPressAnyKey);
<a name="l00145"></a>00145 console->Getch();
<a name="l00146"></a>00146 CleanupStack::PopAndDestroy(console);
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <span class="comment">// Standard entry point function</span>
<a name="l00150"></a>00150 TInt E32Main()
<a name="l00151"></a>00151 {
<a name="l00152"></a>00152 __UHEAP_MARK;
<a name="l00153"></a>00153 <span class="comment">// Active scheduler required as this is a console app</span>
<a name="l00154"></a>00154 CActiveScheduler* scheduler=<span class="keyword">new</span> CActiveScheduler;
<a name="l00155"></a>00155 <span class="comment">// If active scheduler has been created, install it.</span>
<a name="l00156"></a>00156 <span class="keywordflow">if</span> (scheduler)
<a name="l00157"></a>00157 {
<a name="l00158"></a>00158 CActiveScheduler::Install(scheduler);
<a name="l00159"></a>00159 <span class="comment">// Cleanup stack needed</span>
<a name="l00160"></a>00160 CTrapCleanup* cleanup=CTrapCleanup::New();
<a name="l00161"></a>00161 <span class="keywordflow">if</span> (cleanup)
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163 TRAP_IGNORE(DoExampleL());
<a name="l00164"></a>00164 <span class="keyword">delete</span> cleanup;
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166 <span class="keyword">delete</span> scheduler;
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168 __UHEAP_MARKEND;
<a name="l00169"></a>00169 <span class="keywordflow">return</span> KErrNone;
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171
<a name="l00172"></a>00172
<a name="l00173"></a>00173
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