Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_accept_print_input_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/Base/IPC/Async/AcceptPrintInput/AcceptPrintInput.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2000-2009 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">// Asynchronous keyboard processing with messenger program.</span>
<a name="l00015"></a>00015 <span class="comment">// A single CWriteKeyProcessor active object (derived from </span>
<a name="l00016"></a>00016 <span class="comment">// class CActiveConsole) which accepts and prints keyboard</span>
<a name="l00017"></a>00017 <span class="comment">// input to a console.</span>
<a name="l00018"></a>00018 <span class="comment">//</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#include "CommonFramework.h"</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="comment">// panics</span>
<a name="l00023"></a>00023 <span class="keyword">enum</span>
<a name="l00024"></a>00024 {
<a name="l00025"></a>00025 EPanicAlreadyActive=1000,
<a name="l00026"></a>00026 };
<a name="l00027"></a>00027
<a name="l00029"></a>00029 <span class="comment">//</span>
<a name="l00030"></a>00030 <span class="comment">// -----> CTimedMessenger (definition)</span>
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00033"></a>00033 <span class="comment"></span><span class="keyword">class </span>CTimedMessenger : <span class="keyword">public</span> CTimer
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <span class="keyword">public</span>:
<a name="l00036"></a>00036 <span class="comment">// Construction</span>
<a name="l00037"></a>00037 CTimedMessenger();
<a name="l00038"></a>00038 <span class="comment">// Destruction</span>
<a name="l00039"></a>00039 ~CTimedMessenger();
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="keyword">public</span>:
<a name="l00042"></a>00042 <span class="comment">// Static construction</span>
<a name="l00043"></a>00043 <span class="keyword">static</span> CTimedMessenger* NewLC(<span class="keyword">const</span> TDesC& aGreeting,
<a name="l00044"></a>00044 TInt aTicksRequested,
<a name="l00045"></a>00045 TInt aTicksInterval
<a name="l00046"></a>00046 );
<a name="l00047"></a>00047 <span class="keyword">static</span> CTimedMessenger* NewL(<span class="keyword">const</span> TDesC& aGreeting,
<a name="l00048"></a>00048 TInt aTicksRequested,
<a name="l00049"></a>00049 TInt aTicksInterval
<a name="l00050"></a>00050 );
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keyword">public</span>:
<a name="l00053"></a>00053 <span class="comment">// Second phase construction</span>
<a name="l00054"></a>00054 <span class="keywordtype">void</span> ConstructL(<span class="keyword">const</span> TDesC& aGreeting,
<a name="l00055"></a>00055 TInt aTicksRequested,
<a name="l00056"></a>00056 TInt aTicksInterval
<a name="l00057"></a>00057 );
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">// issue request</span>
<a name="l00060"></a>00060 <span class="keywordtype">void</span> IssueRequest();
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="comment">// Cancel request</span>
<a name="l00063"></a>00063 <span class="comment">// Defined as pure virtual by CActive;</span>
<a name="l00064"></a>00064 <span class="comment">// implementation provided by this class.</span>
<a name="l00065"></a>00065 <span class="keywordtype">void</span> DoCancel();
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="comment">// service completed request.</span>
<a name="l00068"></a>00068 <span class="comment">// Defined as pure virtual by CActive;</span>
<a name="l00069"></a>00069 <span class="comment">// implementation provided by this class.</span>
<a name="l00070"></a>00070 <span class="keywordtype">void</span> RunL();
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="keyword">public</span>:
<a name="l00073"></a>00073 <span class="comment">// data members defined by this class</span>
<a name="l00074"></a>00074 TBufC<20> iGreeting; <span class="comment">// Text of the greeting.</span>
<a name="l00075"></a>00075 TInt iTicksRequested; <span class="comment">// Total number of greetings CTimedMessenger</span>
<a name="l00076"></a>00076 <span class="comment">// will emit.</span>
<a name="l00077"></a>00077 TInt iTicksInterval; <span class="comment">// Number of seconds between each greeting.</span>
<a name="l00078"></a>00078 TInt iTicksDone; <span class="comment">// Number of greetings issued so far.</span>
<a name="l00079"></a>00079 };
<a name="l00080"></a>00080
<a name="l00081"></a>00081
<a name="l00083"></a>00083 <span class="comment">//</span>
<a name="l00084"></a>00084 <span class="comment">// -----> CExampleScheduler (definition)</span>
<a name="l00085"></a>00085 <span class="comment">//</span>
<a name="l00087"></a>00087 <span class="comment"></span><span class="keyword">class </span>CExampleScheduler : <span class="keyword">public</span> CActiveScheduler
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 <span class="keyword">public</span>:
<a name="l00090"></a>00090 <span class="keywordtype">void</span> Error (TInt aError) <span class="keyword">const</span>;
<a name="l00091"></a>00091 };
<a name="l00092"></a>00092
<a name="l00093"></a>00093
<a name="l00095"></a>00095 <span class="comment">//</span>
<a name="l00096"></a>00096 <span class="comment">// -----> CActiveConsole (definition)</span>
<a name="l00097"></a>00097 <span class="comment">//</span>
<a name="l00098"></a>00098 <span class="comment">// An abstract class which provides the facility to issue key requests. </span>
<a name="l00099"></a>00099 <span class="comment">//</span>
<a name="l00101"></a>00101 <span class="comment"></span><span class="keyword">class </span>CActiveConsole : <span class="keyword">public</span> CActive
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 <span class="keyword">public</span>:
<a name="l00104"></a>00104 <span class="comment">// Construction</span>
<a name="l00105"></a>00105 CActiveConsole(CConsoleBase* aConsole);
<a name="l00106"></a>00106 <span class="keywordtype">void</span> ConstructL();
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="comment">// Destruction</span>
<a name="l00109"></a>00109 ~CActiveConsole();
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="comment">// Issue request</span>
<a name="l00112"></a>00112 <span class="keywordtype">void</span> RequestCharacter();
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="comment">// Cancel request.</span>
<a name="l00115"></a>00115 <span class="comment">// Defined as pure virtual by CActive;</span>
<a name="l00116"></a>00116 <span class="comment">// implementation provided by this class.</span>
<a name="l00117"></a>00117 <span class="keywordtype">void</span> DoCancel();
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="comment">// Service completed request.</span>
<a name="l00120"></a>00120 <span class="comment">// Defined as pure virtual by CActive;</span>
<a name="l00121"></a>00121 <span class="comment">// implementation provided by this class,</span>
<a name="l00122"></a>00122 <span class="keywordtype">void</span> RunL();
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="comment">// Called from RunL() - an implementation must be provided</span>
<a name="l00125"></a>00125 <span class="comment">// by derived classes to handle the completed request</span>
<a name="l00126"></a>00126 <span class="keyword">virtual</span> <span class="keywordtype">void</span> ProcessKeyPress(TChar aChar) = 0;
<a name="l00127"></a>00127
<a name="l00128"></a>00128 <span class="keyword">protected</span>:
<a name="l00129"></a>00129 <span class="comment">// Data members defined by this class</span>
<a name="l00130"></a>00130 CConsoleBase* iConsole; <span class="comment">// A console for reading from</span>
<a name="l00131"></a>00131 };
<a name="l00132"></a>00132
<a name="l00133"></a>00133
<a name="l00135"></a>00135 <span class="comment">//</span>
<a name="l00136"></a>00136 <span class="comment">// -----> CWriteKeyProcessor (definition)</span>
<a name="l00137"></a>00137 <span class="comment">//</span>
<a name="l00138"></a>00138 <span class="comment">// This class is derived from CActiveConsole. </span>
<a name="l00139"></a>00139 <span class="comment">// Request handling: accepts input from the keyboard and outputs it </span>
<a name="l00140"></a>00140 <span class="comment">// to the console.</span>
<a name="l00141"></a>00141 <span class="comment">//</span>
<a name="l00143"></a>00143 <span class="comment"></span><span class="keyword">class </span>CWriteKeyProcessor : <span class="keyword">public</span> CActiveConsole
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 <span class="keyword">public</span>:
<a name="l00146"></a>00146 <span class="comment">// Construction</span>
<a name="l00147"></a>00147 CWriteKeyProcessor(CConsoleBase* aConsole);
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <span class="keyword">public</span>:
<a name="l00150"></a>00150 <span class="comment">// Static constuction</span>
<a name="l00151"></a>00151 <span class="keyword">static</span> CWriteKeyProcessor *NewLC (CConsoleBase* aConsole);
<a name="l00152"></a>00152 <span class="keyword">static</span> CWriteKeyProcessor *NewL(CConsoleBase* aConsole);
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="keyword">public</span>:
<a name="l00155"></a>00155 <span class="comment">// Service request</span>
<a name="l00156"></a>00156 <span class="keywordtype">void</span> ProcessKeyPress(TChar aChar);
<a name="l00157"></a>00157 };
<a name="l00158"></a>00158
<a name="l00159"></a>00159
<a name="l00161"></a>00161 <span class="comment">//</span>
<a name="l00162"></a>00162 <span class="comment">// -----> CTimedMessenger (implementation)</span>
<a name="l00163"></a>00163 <span class="comment">//</span>
<a name="l00165"></a>00165 <span class="comment"></span>CTimedMessenger::CTimedMessenger()
<a name="l00166"></a>00166 : CTimer(CActive::EPriorityStandard)
<a name="l00167"></a>00167 <span class="comment">// Construct standard-priority active object</span>
<a name="l00168"></a>00168 {};
<a name="l00169"></a>00169
<a name="l00170"></a>00170 CTimedMessenger* CTimedMessenger::NewLC(<span class="keyword">const</span> TDesC& aGreeting,
<a name="l00171"></a>00171 TInt aTicksRequested,
<a name="l00172"></a>00172 TInt aTicksInterval
<a name="l00173"></a>00173 )
<a name="l00174"></a>00174 {
<a name="l00175"></a>00175 CTimedMessenger* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CTimedMessenger;
<a name="l00176"></a>00176 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00177"></a>00177 <span class="keyword">self</span>->ConstructL(aGreeting,aTicksRequested,aTicksInterval);
<a name="l00178"></a>00178 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180
<a name="l00181"></a>00181 CTimedMessenger* CTimedMessenger::NewL(<span class="keyword">const</span> TDesC& aGreeting,
<a name="l00182"></a>00182 TInt aTicksRequested,
<a name="l00183"></a>00183 TInt aTicksInterval
<a name="l00184"></a>00184 )
<a name="l00185"></a>00185 {
<a name="l00186"></a>00186 CTimedMessenger* <span class="keyword">self</span> = <a class="code" href="class_c_thread_server.html#a7c41592480f2c412599c332f52a61347">NewLC</a>(aGreeting,aTicksRequested,aTicksInterval);
<a name="l00187"></a>00187 CleanupStack::Pop();
<a name="l00188"></a>00188 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <span class="keywordtype">void</span> CTimedMessenger::ConstructL(<span class="keyword">const</span> TDesC& aGreeting,
<a name="l00192"></a>00192 TInt aTicksRequested,
<a name="l00193"></a>00193 TInt aTicksInterval
<a name="l00194"></a>00194 )
<a name="l00195"></a>00195 {
<a name="l00196"></a>00196 <span class="comment">// Base class second-phase construction.</span>
<a name="l00197"></a>00197 CTimer::ConstructL();
<a name="l00198"></a>00198 <span class="comment">// Set members from arguments</span>
<a name="l00199"></a>00199 iGreeting = aGreeting; <span class="comment">// Set greeting text.</span>
<a name="l00200"></a>00200 iTicksRequested = aTicksRequested; <span class="comment">// Ticks requested</span>
<a name="l00201"></a>00201 iTicksInterval = aTicksInterval; <span class="comment">// Interval between ticks</span>
<a name="l00202"></a>00202 <span class="comment">// Add active object to active scheduler</span>
<a name="l00203"></a>00203 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205
<a name="l00206"></a>00206
<a name="l00207"></a>00207 CTimedMessenger::~CTimedMessenger()
<a name="l00208"></a>00208 {
<a name="l00209"></a>00209 <span class="comment">// Make sure we're cancelled</span>
<a name="l00210"></a>00210 Cancel();
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212
<a name="l00213"></a>00213 <span class="keywordtype">void</span> CTimedMessenger::DoCancel()
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <span class="comment">// Base class</span>
<a name="l00216"></a>00216 CTimer::DoCancel();
<a name="l00217"></a>00217 <span class="comment">// Reset this variable - needed if the object is re-activated later</span>
<a name="l00218"></a>00218 iTicksDone = 0;
<a name="l00219"></a>00219 <span class="comment">// Tell user</span>
<a name="l00220"></a>00220 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgCancelled,<span class="stringliteral">"Outstanding Messenger request cancelled\n"</span>);
<a name="l00221"></a>00221 console->Printf(KMsgCancelled);
<a name="l00222"></a>00222 }
<a name="l00223"></a>00223
<a name="l00224"></a>00224 <span class="keywordtype">void</span> CTimedMessenger::IssueRequest()
<a name="l00225"></a>00225 {
<a name="l00226"></a>00226 <span class="comment">// There should never be an outstanding request at this point.</span>
<a name="l00227"></a>00227 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgAlreadyActive,<span class="stringliteral">"Is already Active"</span>);
<a name="l00228"></a>00228 __ASSERT_ALWAYS(!IsActive(),User::Panic(KMsgAlreadyActive,EPanicAlreadyActive));
<a name="l00229"></a>00229 <span class="comment">// Request another wait</span>
<a name="l00230"></a>00230 CTimer::After( iTicksInterval*1000000);
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232
<a name="l00233"></a>00233 <span class="keywordtype">void</span> CTimedMessenger::RunL()
<a name="l00234"></a>00234 {
<a name="l00235"></a>00235 <span class="comment">// Handle request completion</span>
<a name="l00236"></a>00236 <span class="comment">// One more tick done</span>
<a name="l00237"></a>00237 iTicksDone++;
<a name="l00238"></a>00238 <span class="comment">// Print greeting</span>
<a name="l00239"></a>00239 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatString1,<span class="stringliteral">"%S \n"</span>);
<a name="l00240"></a>00240 console->Printf(KFormatString1,&iGreeting);
<a name="l00241"></a>00241 <span class="comment">// Issue new request, or stop if we have reached the limit</span>
<a name="l00242"></a>00242 <span class="keywordflow">if</span> (iTicksDone < iTicksRequested)
<a name="l00243"></a>00243 {
<a name="l00244"></a>00244 IssueRequest();
<a name="l00245"></a>00245 }
<a name="l00246"></a>00246 <span class="keywordflow">else</span>
<a name="l00247"></a>00247 {
<a name="l00248"></a>00248 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgFinished,<span class="stringliteral">"Messenger finished \n"</span>);
<a name="l00249"></a>00249 console->Printf(KMsgFinished);
<a name="l00250"></a>00250 <span class="comment">// Reset this variable - needed if the object is re-activated later</span>
<a name="l00251"></a>00251 iTicksDone=0;
<a name="l00252"></a>00252 <span class="comment">// Can now stop the active scheduler</span>
<a name="l00253"></a>00253 CActiveScheduler::Stop();
<a name="l00254"></a>00254 }
<a name="l00255"></a>00255 }
<a name="l00256"></a>00256
<a name="l00257"></a>00257
<a name="l00259"></a>00259 <span class="comment">//</span>
<a name="l00260"></a>00260 <span class="comment">// -----> CExampleScheduler (implementation)</span>
<a name="l00261"></a>00261 <span class="comment">//</span>
<a name="l00263"></a>00263 <span class="comment"></span><span class="keywordtype">void</span> CExampleScheduler::Error(TInt aError)<span class="keyword"> const</span>
<a name="l00264"></a>00264 <span class="keyword"> </span>{
<a name="l00265"></a>00265 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgSchedErr,<span class="stringliteral">"CExampleScheduler-error"</span>);
<a name="l00266"></a>00266 User::Panic(KMsgSchedErr,aError);
<a name="l00267"></a>00267 }
<a name="l00268"></a>00268
<a name="l00269"></a>00269
<a name="l00271"></a>00271 <span class="comment">//</span>
<a name="l00272"></a>00272 <span class="comment">// -----> CActiveConsole (implementation)</span>
<a name="l00273"></a>00273 <span class="comment">//</span>
<a name="l00275"></a>00275 <span class="comment"></span>CActiveConsole::CActiveConsole( CConsoleBase* aConsole)
<a name="l00276"></a>00276 : CActive(CActive::EPriorityUserInput)
<a name="l00277"></a>00277 <span class="comment">// Construct high-priority active object</span>
<a name="l00278"></a>00278 {
<a name="l00279"></a>00279 iConsole = aConsole;
<a name="l00280"></a>00280 }
<a name="l00281"></a>00281
<a name="l00282"></a>00282 <span class="keywordtype">void</span> CActiveConsole::ConstructL()
<a name="l00283"></a>00283 {
<a name="l00284"></a>00284 <span class="comment">// Add to active scheduler</span>
<a name="l00285"></a>00285 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287
<a name="l00288"></a>00288 CActiveConsole::~CActiveConsole()
<a name="l00289"></a>00289 {
<a name="l00290"></a>00290 <span class="comment">// Make sure we're cancelled</span>
<a name="l00291"></a>00291 Cancel();
<a name="l00292"></a>00292 }
<a name="l00293"></a>00293
<a name="l00294"></a>00294 <span class="keywordtype">void</span> CActiveConsole::DoCancel()
<a name="l00295"></a>00295 {
<a name="l00296"></a>00296 iConsole->ReadCancel();
<a name="l00297"></a>00297 }
<a name="l00298"></a>00298
<a name="l00299"></a>00299 <span class="keywordtype">void</span> CActiveConsole::RunL()
<a name="l00300"></a>00300 {
<a name="l00301"></a>00301 <span class="comment">// Handle completed request</span>
<a name="l00302"></a>00302 ProcessKeyPress(TChar(iConsole->KeyCode()));
<a name="l00303"></a>00303 }
<a name="l00304"></a>00304
<a name="l00305"></a>00305 <span class="keywordtype">void</span> CActiveConsole::RequestCharacter()
<a name="l00306"></a>00306 {
<a name="l00307"></a>00307 <span class="comment">// A request is issued to the CConsoleBase to accept a</span>
<a name="l00308"></a>00308 <span class="comment">// character from the keyboard.</span>
<a name="l00309"></a>00309 iConsole->Read(iStatus);
<a name="l00310"></a>00310 SetActive();
<a name="l00311"></a>00311 }
<a name="l00312"></a>00312
<a name="l00313"></a>00313
<a name="l00315"></a>00315 <span class="comment">//</span>
<a name="l00316"></a>00316 <span class="comment">// -----> CWriteKeyProcessor (implementation)</span>
<a name="l00317"></a>00317 <span class="comment">//</span>
<a name="l00319"></a>00319 <span class="comment"></span>CWriteKeyProcessor::CWriteKeyProcessor(CConsoleBase* aConsole)
<a name="l00320"></a>00320 : CActiveConsole(aConsole)
<a name="l00321"></a>00321
<a name="l00322"></a>00322 {};
<a name="l00323"></a>00323
<a name="l00324"></a>00324 CWriteKeyProcessor* CWriteKeyProcessor::NewLC(CConsoleBase* aConsole)
<a name="l00325"></a>00325 {
<a name="l00326"></a>00326 CWriteKeyProcessor* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CWriteKeyProcessor(aConsole);
<a name="l00327"></a>00327 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00328"></a>00328 <span class="keyword">self</span>->ConstructL();
<a name="l00329"></a>00329 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00330"></a>00330 }
<a name="l00331"></a>00331
<a name="l00332"></a>00332 CWriteKeyProcessor* CWriteKeyProcessor::NewL(CConsoleBase* aConsole)
<a name="l00333"></a>00333 {
<a name="l00334"></a>00334 CWriteKeyProcessor* <span class="keyword">self</span>=<a class="code" href="class_c_thread_server.html#a7c41592480f2c412599c332f52a61347">NewLC</a>(aConsole);
<a name="l00335"></a>00335 CleanupStack::Pop();
<a name="l00336"></a>00336 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00337"></a>00337 }
<a name="l00338"></a>00338
<a name="l00339"></a>00339 <span class="keywordtype">void</span> CWriteKeyProcessor::ProcessKeyPress(TChar aChar)
<a name="l00340"></a>00340 {
<a name="l00341"></a>00341 <span class="comment">// "Esc" character prints a new line and stops the scheduler</span>
<a name="l00342"></a>00342 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextEsc,<span class="stringliteral">"\n"</span>);
<a name="l00343"></a>00343 <span class="keywordflow">if</span> (aChar == EKeyEscape)
<a name="l00344"></a>00344 {
<a name="l00345"></a>00345 iConsole->Printf(KTextEsc);
<a name="l00346"></a>00346 CActiveScheduler::Stop();
<a name="l00347"></a>00347 <span class="keywordflow">return</span>;
<a name="l00348"></a>00348 }
<a name="l00349"></a>00349
<a name="l00350"></a>00350 <span class="comment">// "Enter" prints a new line character</span>
<a name="l00351"></a>00351 <span class="comment">// An alphabetic or space is printed as a character;</span>
<a name="l00352"></a>00352 <span class="comment">// anything else is printed as an integer.</span>
<a name="l00353"></a>00353 <span class="keywordflow">if</span> (aChar == EKeyEnter)
<a name="l00354"></a>00354 iConsole->Printf(KTextEsc);
<a name="l00355"></a>00355 <span class="keywordflow">else</span>
<a name="l00356"></a>00356 {
<a name="l00357"></a>00357 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatString2,<span class="stringliteral">"%c"</span>);
<a name="l00358"></a>00358 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatString3,<span class="stringliteral">"%d"</span>);
<a name="l00359"></a>00359 <span class="keywordflow">if</span> (aChar.IsAlphaDigit()|| aChar.IsSpace())
<a name="l00360"></a>00360 iConsole->Printf(KFormatString2,TUint(aChar));
<a name="l00361"></a>00361 <span class="keywordflow">else</span>
<a name="l00362"></a>00362 iConsole->Printf(KFormatString3,TUint(aChar));
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="comment">// Issue another request </span>
<a name="l00366"></a>00366 RequestCharacter();
<a name="l00367"></a>00367 }
<a name="l00368"></a>00368
<a name="l00369"></a>00369
<a name="l00371"></a>00371 <span class="comment">//</span>
<a name="l00372"></a>00372 <span class="comment">// Do the example</span>
<a name="l00373"></a>00373 <span class="comment">//</span>
<a name="l00375"></a>00375 <span class="comment"></span>LOCAL_C <span class="keywordtype">void</span> doExampleL()
<a name="l00376"></a>00376 {
<a name="l00377"></a>00377 <span class="comment">// Construct and install the active scheduler</span>
<a name="l00378"></a>00378 CExampleScheduler* exampleScheduler = <span class="keyword">new</span> (ELeave) CExampleScheduler;
<a name="l00379"></a>00379
<a name="l00380"></a>00380 <span class="comment">// Push onto the cleanup stack</span>
<a name="l00381"></a>00381 CleanupStack::PushL(exampleScheduler);
<a name="l00382"></a>00382
<a name="l00383"></a>00383 <span class="comment">// Install as the active scheduler</span>
<a name="l00384"></a>00384 CActiveScheduler::Install(exampleScheduler);
<a name="l00385"></a>00385
<a name="l00386"></a>00386 <span class="comment">// Create a CWriteKeyProcessor active object</span>
<a name="l00387"></a>00387 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTitleMsg,<span class="stringliteral">"A single CWriteKeyProcessor active object.\nIt accepts and prints keyboard input to the console.\nPress ESC to end.\n\n"</span>);
<a name="l00388"></a>00388 console->Printf(KTitleMsg);
<a name="l00389"></a>00389 CWriteKeyProcessor* keyProcesser = CWriteKeyProcessor::NewLC(console);
<a name="l00390"></a>00390
<a name="l00391"></a>00391 <span class="comment">// Issue the first request</span>
<a name="l00392"></a>00392 keyProcesser->RequestCharacter();
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="comment">// Main part of program is a wait loop</span>
<a name="l00395"></a>00395 <span class="comment">// This function completes when the scheduler stops</span>
<a name="l00396"></a>00396 CActiveScheduler::Start();
<a name="l00397"></a>00397
<a name="l00398"></a>00398 <span class="comment">// Remove from the cleanup stack and destroy:</span>
<a name="l00399"></a>00399 <span class="comment">// 1. the CWriteKeyProcessor active object</span>
<a name="l00400"></a>00400 <span class="comment">// 2. exampleScheduler</span>
<a name="l00401"></a>00401 CleanupStack::PopAndDestroy(2);
<a name="l00402"></a>00402 }
<a name="l00403"></a>00403
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