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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/solution_2src_2_s60_memory_lab_container_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/ForumNokia/Symbian_OS_Basics_Lab_Exercises_v3_1/Lab_04304.cb1/solution/src/S60MemoryLabContainer.cpp Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/ForumNokia/Symbian_OS_Basics_Lab_Exercises_v3_1/Lab_04304.cb1/solution/src/S60MemoryLabContainer.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright: (c) 2006 Nokia Ltd.  All rights reserved.</span>
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<a name="l00002"></a>00002
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<a name="l00003"></a>00003 <span class="comment">// INCLUDE FILES</span>
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<a name="l00004"></a>00004 <span class="preprocessor">#include &quot;S60MemoryLabContainer.h&quot;</span>
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<a name="l00005"></a>00005 <span class="preprocessor">#include &lt;eiklabel.h&gt;</span>  <span class="comment">// for example label control</span>
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<a name="l00006"></a>00006 <span class="preprocessor">#include &lt;eikappui.h&gt;</span>
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<a name="l00007"></a>00007
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<a name="l00008"></a>00008 <span class="comment">// ================= MEMBER FUNCTIONS =======================</span>
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<a name="l00009"></a>00009
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<a name="l00010"></a>00010 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00011"></a>00011 <span class="comment">// CS60MemoryLabContainer::ConstructL(const TRect&amp; aRect)</span>
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<a name="l00012"></a>00012 <span class="comment">// Second phase constructor</span>
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<a name="l00013"></a>00013 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00014"></a>00014 <span class="comment">//</span>
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<a name="l00015"></a>00015 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextExtremelyLongLabel,    <span class="stringliteral">&quot;Extremely Long Label&quot;</span>);
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<a name="l00016"></a>00016 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextVeryLongLabel,         <span class="stringliteral">&quot;Very Long Label&quot;</span>);
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<a name="l00017"></a>00017 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextLongLabel,             <span class="stringliteral">&quot;Long Label&quot;</span>);
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<a name="l00018"></a>00018 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextLabel,                 <span class="stringliteral">&quot;Label&quot;</span>);
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<a name="l00019"></a>00019 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextCleanupStackTest,      <span class="stringliteral">&quot;Cleanup Stack Test&quot;</span>);
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<a name="l00020"></a>00020
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<a name="l00021"></a>00021
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<a name="l00022"></a><a class="code" href="class_c_s60_memory_lab_container.html#ab93e6ec9241a152235175dc34dfd561d">00022</a> <span class="keywordtype">void</span> <a class="code" href="class_c_s60_memory_lab_container.html#ab93e6ec9241a152235175dc34dfd561d">CS60MemoryLabContainer::ConstructL</a>(<span class="keyword">const</span> TRect&amp; aRect)
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<a name="l00023"></a>00023     {
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<a name="l00024"></a>00024     CreateWindowL();
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026     <span class="comment">// Edit 1: uncomment the line below </span>
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<a name="l00027"></a>00027     <span class="comment">// User::Leave(KErrCancel);</span>
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<a name="l00028"></a>00028
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<a name="l00029"></a>00029     iTopLabel = <span class="keyword">new</span> (ELeave) CEikLabel;
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<a name="l00030"></a>00030     iTopLabel-&gt;SetContainerWindowL(*<span class="keyword">this</span>);
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<a name="l00031"></a>00031     iTopLabel-&gt;SetTextL(KTextLabel);
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<a name="l00032"></a>00032
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<a name="l00033"></a>00033     iBottomLabel = <span class="keyword">new</span> (ELeave) CEikLabel;
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<a name="l00034"></a>00034     iBottomLabel-&gt;SetContainerWindowL( *<span class="keyword">this</span> );
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<a name="l00035"></a>00035     iBottomLabel-&gt;SetTextL(KTextLongLabel);
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<a name="l00036"></a>00036
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<a name="l00037"></a>00037     SetRect(aRect);
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<a name="l00038"></a>00038     ActivateL();
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<a name="l00039"></a>00039     }
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<a name="l00040"></a>00040
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<a name="l00041"></a>00041 <span class="comment">// Destructor</span>
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<a name="l00042"></a><a class="code" href="class_c_s60_memory_lab_container.html#a6dae98bc745b26bfcf5dde8151aae21f">00042</a> <a class="code" href="class_c_s60_memory_lab_container.html#a6dae98bc745b26bfcf5dde8151aae21f">CS60MemoryLabContainer::~CS60MemoryLabContainer</a>()
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<a name="l00043"></a>00043     {
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<a name="l00044"></a>00044     <span class="keyword">delete</span> iTopLabel;
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<a name="l00045"></a>00045     <span class="keyword">delete</span> iBottomLabel;
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<a name="l00046"></a>00046     }
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<a name="l00047"></a>00047
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<a name="l00048"></a>00048 <span class="keywordtype">void</span> CS60MemoryLabContainer::ToggleLabelsL()
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<a name="l00049"></a>00049     {
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<a name="l00050"></a>00050     <span class="keywordflow">if</span> (iToggleFlag)
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<a name="l00051"></a>00051         {
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<a name="l00052"></a>00052         iTopLabel-&gt;SetTextL(KTextLabel);
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<a name="l00053"></a>00053         iBottomLabel-&gt;SetTextL(KTextLongLabel);
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<a name="l00054"></a>00054         }
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<a name="l00055"></a>00055     <span class="keywordflow">else</span>
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<a name="l00056"></a>00056         {
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<a name="l00057"></a>00057         <span class="comment">// Edit 3: </span>
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<a name="l00058"></a>00058         <span class="comment">//  a) Add a Trap harness (TRAPD macro) around the following 3 lines of code</span>
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<a name="l00059"></a>00059         <span class="comment">//  b) If an error occurs:</span>
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<a name="l00060"></a>00060         <span class="comment">//      i) Set the text of iTopLabel to be KTextLabel</span>
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<a name="l00061"></a>00061         <span class="comment">//      ii) Raise the error again using User::Leave(error)</span>
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<a name="l00062"></a>00062         TRAPD(
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<a name="l00063"></a>00063             error,
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<a name="l00064"></a>00064             iTopLabel-&gt;SetTextL(KTextVeryLongLabel);
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<a name="l00065"></a>00065             <span class="comment">// Edit 2: Uncomment the line below</span>
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<a name="l00066"></a>00066             User::Leave(KErrNoMemory); <span class="comment">// simulates the line below leaving</span>
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<a name="l00067"></a>00067             iBottomLabel-&gt;SetTextL(KTextExtremelyLongLabel);
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<a name="l00068"></a>00068             );
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<a name="l00069"></a>00069
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<a name="l00070"></a>00070         <span class="keywordflow">if</span> (error != KErrNone)
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<a name="l00071"></a>00071             {
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<a name="l00072"></a>00072             <span class="comment">// Attempt to reset the label to the previous value </span>
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<a name="l00073"></a>00073             <span class="comment">// This may be unneccessary as setting the text of  </span>
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<a name="l00074"></a>00074             <span class="comment">// iTopLabel may have caused the Leave</span>
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<a name="l00075"></a>00075             iTopLabel-&gt;SetTextL(KTextLabel);
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<a name="l00076"></a>00076             <span class="comment">// Propagate the leave up the call stack</span>
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<a name="l00077"></a>00077             User::Leave(error);
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<a name="l00078"></a>00078             }
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<a name="l00079"></a>00079         }
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<a name="l00080"></a>00080     iToggleFlag = !iToggleFlag;
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<a name="l00081"></a>00081     }
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<a name="l00082"></a>00082
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<a name="l00083"></a>00083 <span class="keywordtype">void</span> CS60MemoryLabContainer::CleanupStackTestL()
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<a name="l00084"></a>00084     {
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<a name="l00085"></a>00085     <span class="comment">// Create string on the heap to store a copy of a literal string</span>
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<a name="l00086"></a>00086     HBufC* labelText = HBufC::NewL(KTextCleanupStackTest().Length());
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<a name="l00087"></a>00087     <span class="comment">// Edit 5: Put labelText on the Cleanup Stack using </span>
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<a name="l00088"></a>00088     <span class="comment">//         CleanupStack::PushL(labelText);</span>
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<a name="l00089"></a>00089     <span class="comment">//         Alternatively HBufC::NewLC(KTextCleanupStackTest().Length()) could </span>
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<a name="l00090"></a>00090     <span class="comment">//         be called instead of HBufC::NewL(KTextCleanupStackTest().Length())</span>
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<a name="l00091"></a>00091     CleanupStack::PushL(labelText);
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<a name="l00092"></a>00092     *labelText = KTextCleanupStackTest; <span class="comment">// Initialise the heap string</span>
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<a name="l00093"></a>00093     <span class="comment">// Edit 4: Uncomment the line below</span>
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<a name="l00094"></a>00094     User::Leave(KErrNoMemory); <span class="comment">// mimic the effect of SetTextL() below leaving</span>
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<a name="l00095"></a>00095     iBottomLabel-&gt;SetTextL(*labelText);
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<a name="l00096"></a>00096     <span class="comment">// Edit 6: Replace the following line with CleanupStack::PopAndDestroy();</span>
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<a name="l00097"></a>00097     CleanupStack::PopAndDestroy();
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<a name="l00098"></a>00098     }
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<a name="l00099"></a>00099
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<a name="l00100"></a>00100
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<a name="l00101"></a>00101 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00102"></a>00102 <span class="comment">// CS60MemoryLabContainer::SizeChanged()</span>
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<a name="l00103"></a>00103 <span class="comment">// Called by framework when the view size is changed</span>
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<a name="l00104"></a>00104 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00105"></a>00105 <span class="comment">//</span>
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<a name="l00106"></a>00106 <span class="keywordtype">void</span> CS60MemoryLabContainer::SizeChanged()
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<a name="l00107"></a>00107     {
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<a name="l00108"></a>00108     <span class="comment">// Set the position and size of the labels so they can </span>
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<a name="l00109"></a>00109     <span class="comment">// hold all the text</span>
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<a name="l00110"></a>00110     TRect rect = Rect();
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<a name="l00111"></a>00111
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<a name="l00112"></a>00112     iTopLabel-&gt;SetExtent( TPoint(0,0), TSize(Rect().Width(), Rect().Height()/2));
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<a name="l00113"></a>00113     iBottomLabel-&gt;SetExtent( TPoint(0,Rect().Height()/2), TSize(Rect().Width(),Rect().Height()/2));
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<a name="l00114"></a>00114     }
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<a name="l00115"></a>00115
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<a name="l00116"></a>00116 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00117"></a>00117 <span class="comment">// CS60MemoryLabContainer::CountComponentControls() const</span>
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<a name="l00118"></a>00118 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00119"></a>00119 <span class="comment">//</span>
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<a name="l00120"></a>00120 TInt CS60MemoryLabContainer::CountComponentControls()<span class="keyword"> const</span>
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<a name="l00121"></a>00121 <span class="keyword">    </span>{
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<a name="l00122"></a>00122     <span class="keywordflow">return</span> 2; <span class="comment">// return nbr of controls inside this container</span>
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<a name="l00123"></a>00123     }
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<a name="l00124"></a>00124
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<a name="l00125"></a>00125 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00126"></a>00126 <span class="comment">// CS60MemoryLabContainer::ComponentControl(TInt aIndex) const</span>
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<a name="l00127"></a>00127 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00128"></a>00128 <span class="comment">//</span>
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<a name="l00129"></a>00129 CCoeControl* CS60MemoryLabContainer::ComponentControl(TInt aIndex)<span class="keyword"> const</span>
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<a name="l00130"></a>00130 <span class="keyword">    </span>{
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<a name="l00131"></a>00131     <span class="keywordflow">switch</span> ( aIndex )
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<a name="l00132"></a>00132         {
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<a name="l00133"></a>00133         <span class="keywordflow">case</span> 0:
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<a name="l00134"></a>00134             <span class="keywordflow">return</span> iTopLabel;
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<a name="l00135"></a>00135         <span class="keywordflow">case</span> 1:
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<a name="l00136"></a>00136             <span class="keywordflow">return</span> iBottomLabel;
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<a name="l00137"></a>00137         <span class="keywordflow">default</span>:
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<a name="l00138"></a>00138             <span class="keywordflow">return</span> NULL;
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<a name="l00139"></a>00139         }
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<a name="l00140"></a>00140     }
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<a name="l00141"></a>00141
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<a name="l00142"></a>00142 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00143"></a>00143 <span class="comment">// CS60MemoryLabContainer::Draw(const TRect&amp; aRect) const</span>
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<a name="l00144"></a>00144 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00145"></a>00145 <span class="comment">//</span>
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<a name="l00146"></a>00146 <span class="keywordtype">void</span> CS60MemoryLabContainer::Draw(<span class="keyword">const</span> TRect&amp; aRect)<span class="keyword"> const</span>
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<a name="l00147"></a>00147 <span class="keyword">    </span>{
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<a name="l00148"></a>00148     CWindowGc&amp; gc = SystemGc();
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<a name="l00149"></a>00149
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<a name="l00150"></a>00150     gc.SetPenStyle(CGraphicsContext::ENullPen);
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<a name="l00151"></a>00151     gc.SetBrushColor(KRgbGray);
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<a name="l00152"></a>00152     gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
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<a name="l00153"></a>00153     gc.DrawRect(aRect);
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<a name="l00154"></a>00154     }
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<a name="l00155"></a>00155
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<a name="l00156"></a>00156 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00157"></a>00157 <span class="comment">// CS60MemoryLabContainer::HandleControlEventL(</span>
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<a name="l00158"></a>00158 <span class="comment">//     CCoeControl* aControl,TCoeEvent aEventType)</span>
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<a name="l00159"></a>00159 <span class="comment">// ---------------------------------------------------------</span>
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<a name="l00160"></a>00160 <span class="comment">//</span>
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<a name="l00161"></a>00161 <span class="keywordtype">void</span> CS60MemoryLabContainer::HandleControlEventL(
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<a name="l00162"></a>00162     CCoeControl* <span class="comment">/*aControl*/</span>,TCoeEvent <span class="comment">/*aEventType*/</span>)
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<a name="l00163"></a>00163     {
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<a name="l00164"></a>00164     <span class="comment">// Do nothing</span>
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<a name="l00165"></a>00165     }
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<a name="l00166"></a>00166
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<a name="l00167"></a>00167 <span class="comment">// End of File  </span>
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</pre></div></div>
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<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
MCL/sftools/depl/docscontent