Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/solution_2src_2_symbian_o_s_basics_lab_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/ForumNokia/Symbian_OS_Basics_Lab_Exercises_v3_1/Lab_04303.cb1/solution/src/SymbianOSBasicsLab.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// SymbianOSBasicsLab.cpp</span>
<a name="l00002"></a>00002 <span class="comment">//</span>
<a name="l00003"></a>00003 <span class="comment">// Copyright (c) 2003 Nokia Ltd. All rights reserved.</span>
<a name="l00004"></a>00004
<a name="l00005"></a>00005
<a name="l00006"></a>00006 <span class="preprocessor">#include <e32cons.h></span>
<a name="l00007"></a>00007
<a name="l00008"></a>00008 <span class="comment">// Function prototype</span>
<a name="l00009"></a>00009 LOCAL_C <span class="keywordtype">void</span> UseBasicTypesL();
<a name="l00010"></a>00010
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Main function called by E32</span>
<a name="l00014"></a>00014 <span class="comment">//</span>
<a name="l00016"></a>00016 <span class="comment"></span>GLDEF_C TInt E32Main()
<a name="l00017"></a>00017 {
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="comment">// Catch any Leaves thrown </span>
<a name="l00020"></a>00020 TRAPD(error, UseBasicTypesL());
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgPanic,<span class="stringliteral">"Error in Symbian OS Basics Lab: "</span>);
<a name="l00023"></a>00023 __ASSERT_ALWAYS(!error, User::Panic(KMsgPanic, error));
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="keywordflow">return</span> 0;
<a name="l00026"></a>00026 }
<a name="l00027"></a>00027
<a name="l00028"></a>00028
<a name="l00030"></a>00030 <span class="comment">//</span>
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00032"></a>00032 <span class="comment">//</span>
<a name="l00034"></a>00034 <span class="comment"></span>LOCAL_C <span class="keywordtype">void</span> UseBasicTypesL()
<a name="l00035"></a>00035 {
<a name="l00036"></a>00036 <span class="comment">// Constant text used for the console app title </span>
<a name="l00037"></a>00037 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KLabTitle,<span class="stringliteral">"Symbian OS Basics Lab"</span>);
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="comment">//</span>
<a name="l00040"></a>00040 <span class="comment">// 'C' class usage:</span>
<a name="l00041"></a>00041 <span class="comment">//</span>
<a name="l00042"></a>00042 <span class="comment">// CConsoleBase derives from CBase and so should be declared on the heap</span>
<a name="l00043"></a>00043 <span class="comment">// Console::NewL is a special way of doing this we will cover in the </span>
<a name="l00044"></a>00044 <span class="comment">// Memory and Resource Management lesson</span>
<a name="l00045"></a>00045 CConsoleBase* console = Console::NewL(KLabTitle, TSize(KConsFullScreen, KConsFullScreen));
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="comment">//</span>
<a name="l00048"></a>00048 <span class="comment">// TInt usage</span>
<a name="l00049"></a>00049 <span class="comment">//</span>
<a name="l00050"></a>00050 <span class="keyword">const</span> TInt KOne = 1;
<a name="l00051"></a>00051 <span class="keyword">const</span> TInt KTwo = 2;
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="comment">// Edit 1: On the line below, declare a TInt called <sum> that adds KOne and KTwo</span>
<a name="l00054"></a>00054 TInt sum = KOne + KTwo;
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KSumOutput, <span class="stringliteral">"%d + %d is %d\n"</span>);
<a name="l00057"></a>00057 <span class="comment">// Edit 2: Uncomment the next line that prints the variables to the screen</span>
<a name="l00058"></a>00058 console->Printf(KSumOutput, KOne, KTwo, sum);
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMaxIntOutput, <span class="stringliteral">"TInt max: %d\n"</span>);
<a name="l00061"></a>00061 console->Printf(KMaxIntOutput, KMaxTInt);
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMinIntOutput, <span class="stringliteral">"TInt min: %d\n"</span>);
<a name="l00064"></a>00064 console->Printf(KMinIntOutput, KMinTInt);
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="comment">//</span>
<a name="l00067"></a>00067 <span class="comment">// TBool usage</span>
<a name="l00068"></a>00068 <span class="comment">//</span>
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="comment">// Edit 3: Declare a TBool called <flag> and initialize to EFalse</span>
<a name="l00071"></a>00071 TBool flag = EFalse;
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">// Edit 4: Uncomment the next 5 lines</span>
<a name="l00074"></a>00074 <span class="keywordflow">if</span> (!flag)
<a name="l00075"></a>00075 {
<a name="l00076"></a>00076 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFlagFalse, <span class="stringliteral">"flag is EFalse\n"</span>);
<a name="l00077"></a>00077 console->Printf(KFlagFalse);
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="comment">// Edit 5: Toggle the value of <flag></span>
<a name="l00081"></a>00081 flag = !flag;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">// Edit 6: Uncomment the next 5 lines </span>
<a name="l00084"></a>00084 <span class="keywordflow">if</span> (flag)
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFlagTrue, <span class="stringliteral">"flag is ETrue\n"</span>);
<a name="l00087"></a>00087 console->Printf(KFlagTrue);
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">//</span>
<a name="l00091"></a>00091 <span class="comment">// enum (TKeyCode) and TText usage</span>
<a name="l00092"></a>00092 <span class="comment">//</span>
<a name="l00093"></a>00093 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KEnterSpace, <span class="stringliteral">"Press space to start timer\n"</span>);
<a name="l00094"></a>00094 console->Printf(KEnterSpace);
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">// Look at key input</span>
<a name="l00097"></a>00097 TKeyCode key = console->Getch();
<a name="l00098"></a>00098 <span class="keywordflow">while</span> (EKeySpace != key)
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KCharVal, <span class="stringliteral">"Char entered is '%c'\n"</span>);
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="comment">// Edit 7: Delcare a TText called <keyVal> and set it to <key>.</span>
<a name="l00103"></a>00103 TText keyVal = key;
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment">// Edit 8: Uncomment the next line</span>
<a name="l00106"></a>00106 console->Printf(KCharVal, keyVal);
<a name="l00107"></a>00107 key = console->Getch();
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="comment">//</span>
<a name="l00111"></a>00111 <span class="comment">// 'R' class usage</span>
<a name="l00112"></a>00112 <span class="comment">//</span>
<a name="l00113"></a>00113 RTimer timer;
<a name="l00114"></a>00114 <span class="keywordflow">if</span> (KErrNone == timer.CreateLocal())
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 TRequestStatus status; <span class="comment">// tracks the status of the request</span>
<a name="l00117"></a>00117 <span class="keyword">const</span> TTimeIntervalMicroSeconds32 KTimerInterval = 5000000;
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="comment">// Edit 9: Uncomment next line to request timeout of </span>
<a name="l00120"></a>00120 <span class="comment">// KTimerInterval micro seconds</span>
<a name="l00121"></a>00121 timer.After(status, KTimerInterval);
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">// Edit 10: Uncomment next line to wait synchronously </span>
<a name="l00124"></a>00124 <span class="comment">// for the timer to complete.</span>
<a name="l00125"></a>00125 User::WaitForRequest(status);
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="comment">// Edit 11: Uncomment the next 2 lines that print to the screen</span>
<a name="l00128"></a>00128 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTimerComplete, <span class="stringliteral">"Timer completed after %d micro secs\n"</span>);
<a name="l00129"></a>00129 console->Printf(KTimerComplete, KTimerInterval );
<a name="l00130"></a>00130 }
<a name="l00131"></a>00131 <span class="keywordflow">else</span>
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTimerError, <span class="stringliteral">"Error creating timer\n"</span>);
<a name="l00134"></a>00134 console->Printf(KTimerError);
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a>00137 timer.Close();
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="comment">// Continue</span>
<a name="l00140"></a>00140 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgPressAnyKey,<span class="stringliteral">"Press any key to end"</span>);
<a name="l00141"></a>00141 console->Printf(KMsgPressAnyKey);
<a name="l00142"></a>00142 console->Getch();
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="keyword">delete</span> console;
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147
<a name="l00148"></a>00148
<a name="l00149"></a>00149
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