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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_scroll_2_base_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/Graphics/WS/Scroll/Base.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/Graphics/WS/Scroll/Base.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>
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<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
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<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
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<a name="l00004"></a>00004 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
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<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
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<a name="l00006"></a>00006 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
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<a name="l00007"></a>00007 <span class="comment">//</span>
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<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
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<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
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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">// Contributors:</span>
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<a name="l00012"></a>00012 <span class="comment">//</span>
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<a name="l00013"></a>00013 <span class="comment">// Description:</span>
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<a name="l00014"></a>00014 <span class="comment">//</span>
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<a name="l00015"></a>00015
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<a name="l00016"></a>00016 <span class="preprocessor">#include &lt;w32std.h&gt;</span>
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<a name="l00017"></a>00017 <span class="preprocessor">#include &quot;Base.h&quot;</span>
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<a name="l00018"></a>00018
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<a name="l00020"></a>00020 <span class="comment">//                                                      CWindow implementation</span>
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<a name="l00022"></a>00022 <span class="comment"></span>
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<a name="l00023"></a>00023 CWindow::CWindow(CWsClient* aClient)
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<a name="l00024"></a>00024         : iClient(aClient)
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<a name="l00025"></a>00025         {
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<a name="l00026"></a>00026         }
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<a name="l00027"></a>00027
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<a name="l00028"></a>00028 <span class="keywordtype">void</span> CWindow::ConstructL (<span class="keyword">const</span> TRect&amp; aRect, <span class="keyword">const</span> TRgb&amp; aColor, CWindow* aParent)
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<a name="l00029"></a>00029         {
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<a name="l00030"></a>00030         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFontName,<span class="stringliteral">&quot;Swiss&quot;</span>);
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<a name="l00031"></a>00031         <span class="comment">// If a parent window was specified, use it; if not, use the window group</span>
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<a name="l00032"></a>00032         <span class="comment">// (aParent defaults to 0).</span>
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<a name="l00033"></a>00033         RWindowTreeNode* parent= aParent ? (RWindowTreeNode*) &amp;(aParent-&gt;Window()) : &amp;(iClient-&gt;iGroup);
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<a name="l00034"></a>00034         <span class="comment">// Allocate and construct the window</span>
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<a name="l00035"></a>00035         iWindow=RWindow(iClient-&gt;iWs);
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<a name="l00036"></a>00036         User::LeaveIfError(iWindow.Construct(*parent,(TUint32)<span class="keyword">this</span>));
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<a name="l00037"></a>00037         <span class="comment">// Store the window&#39;s extent</span>
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<a name="l00038"></a>00038         iRect = aRect;
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<a name="l00039"></a>00039         <span class="comment">// Set up the new window&#39;s extent</span>
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<a name="l00040"></a>00040         iWindow.SetExtent(iRect.iTl, iRect.Size());
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<a name="l00041"></a>00041         <span class="comment">// Set its background color</span>
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<a name="l00042"></a>00042         iWindow.SetBackgroundColor (aColor);
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<a name="l00043"></a>00043         <span class="comment">// Set up font for displaying text</span>
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<a name="l00044"></a>00044         TFontSpec fontSpec(KFontName,200);
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<a name="l00045"></a>00045         User::LeaveIfError(iClient-&gt;iScreen-&gt;GetNearestFontInTwips(iFont,fontSpec));
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<a name="l00046"></a>00046         <span class="comment">// Activate the window</span>
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<a name="l00047"></a>00047         iWindow.Activate();
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<a name="l00048"></a>00048         }
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<a name="l00049"></a>00049
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<a name="l00050"></a>00050 CWindow::~CWindow()
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<a name="l00051"></a>00051         {
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<a name="l00052"></a>00052         iWindow.Close();
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<a name="l00053"></a>00053         iClient-&gt;iScreen-&gt;ReleaseFont(iFont);
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<a name="l00054"></a>00054         }
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<a name="l00055"></a>00055
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<a name="l00056"></a>00056 RWindow&amp; CWindow::Window()
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<a name="l00057"></a>00057         {
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<a name="l00058"></a>00058         <span class="keywordflow">return</span> iWindow;
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<a name="l00059"></a>00059         }
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<a name="l00060"></a>00060
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<a name="l00061"></a>00061 CWindowGc* CWindow::SystemGc()
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<a name="l00062"></a>00062         {
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<a name="l00063"></a>00063         <span class="keywordflow">return</span> iClient-&gt;iGc;
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<a name="l00064"></a>00064         }
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<a name="l00065"></a>00065
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<a name="l00066"></a>00066 CWsScreenDevice* CWindow::Screen()
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<a name="l00067"></a>00067         {
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<a name="l00068"></a>00068         <span class="keywordflow">return</span> iClient-&gt;iScreen;
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<a name="l00069"></a>00069         }
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<a name="l00070"></a>00070
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<a name="l00071"></a>00071 CFont* CWindow::Font()
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<a name="l00072"></a>00072         {
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<a name="l00073"></a>00073         <span class="keywordflow">return</span> iFont;
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<a name="l00074"></a>00074         }
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<a name="l00075"></a>00075
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<a name="l00076"></a>00076
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<a name="l00078"></a>00078 <span class="comment">//                                                      CWsRedrawer implementation</span>
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<a name="l00080"></a>00080 <span class="comment"></span>
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<a name="l00081"></a>00081 CWsRedrawer::CWsRedrawer()
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<a name="l00082"></a>00082         : CActive(CActive::EPriorityLow)
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<a name="l00083"></a>00083         {
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<a name="l00084"></a>00084         }
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<a name="l00085"></a>00085
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<a name="l00086"></a>00086 <span class="keywordtype">void</span> CWsRedrawer::ConstructL(CWsClient* aClient)
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<a name="l00087"></a>00087         {
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<a name="l00088"></a>00088         iClient=aClient; <span class="comment">// remember WsClient that owns us</span>
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<a name="l00089"></a>00089         CActiveScheduler::Add(<span class="keyword">this</span>); <span class="comment">// add ourselves to the scheduler</span>
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<a name="l00090"></a>00090         IssueRequest(); <span class="comment">// issue request to draw</span>
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<a name="l00091"></a>00091         }
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<a name="l00092"></a>00092
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<a name="l00093"></a>00093 CWsRedrawer::~CWsRedrawer()
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<a name="l00094"></a>00094         {
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<a name="l00095"></a>00095         Cancel();
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<a name="l00096"></a>00096         }
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<a name="l00097"></a>00097
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<a name="l00098"></a>00098 <span class="keywordtype">void</span> CWsRedrawer::IssueRequest()
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<a name="l00099"></a>00099         {
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<a name="l00100"></a>00100         iClient-&gt;iWs.RedrawReady(&amp;iStatus);
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<a name="l00101"></a>00101         SetActive();
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<a name="l00102"></a>00102         }
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<a name="l00103"></a>00103
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<a name="l00104"></a>00104 <span class="keywordtype">void</span> CWsRedrawer::DoCancel()
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<a name="l00105"></a>00105         {
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<a name="l00106"></a>00106         iClient-&gt;iWs.RedrawReadyCancel();
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<a name="l00107"></a>00107         }
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<a name="l00108"></a>00108
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<a name="l00109"></a>00109 <span class="keywordtype">void</span> CWsRedrawer::RunL()
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<a name="l00110"></a>00110         {
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<a name="l00111"></a>00111         <span class="comment">// find out what needs to be done in response to the event</span>
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<a name="l00112"></a>00112         TWsRedrawEvent redrawEvent;
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<a name="l00113"></a>00113     iClient-&gt;iWs.GetRedraw(redrawEvent); <span class="comment">// get event</span>
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<a name="l00114"></a>00114         CWindow* window=(CWindow*)(redrawEvent.Handle()); <span class="comment">// get window</span>
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<a name="l00115"></a>00115         <span class="keywordflow">if</span> (window)
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<a name="l00116"></a>00116                 {
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<a name="l00117"></a>00117                 TRect rect=redrawEvent.Rect(); <span class="comment">// and rectangle that needs redrawing</span>
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<a name="l00118"></a>00118                 <span class="comment">// now do drawing</span>
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<a name="l00119"></a>00119                 iClient-&gt;iGc-&gt;Activate(window-&gt;Window());
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<a name="l00120"></a>00120                 window-&gt;Window().BeginRedraw();
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<a name="l00121"></a>00121                 window-&gt;Draw(rect);
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<a name="l00122"></a>00122                 window-&gt;Window().EndRedraw();
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<a name="l00123"></a>00123                 iClient-&gt;iGc-&gt;Deactivate();
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<a name="l00124"></a>00124                 }
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<a name="l00125"></a>00125         <span class="comment">// maintain outstanding request</span>
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<a name="l00126"></a>00126         IssueRequest();
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<a name="l00127"></a>00127         }
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<a name="l00128"></a>00128
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<a name="l00129"></a>00129
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<a name="l00131"></a>00131 <span class="comment">//                                                              CWsClient implementation</span>
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<a name="l00133"></a>00133 <span class="comment"></span>CWsClient::CWsClient()
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<a name="l00134"></a>00134         : CActive(CActive::EPriorityStandard)
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<a name="l00135"></a>00135         {
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<a name="l00136"></a>00136         }
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<a name="l00137"></a>00137
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<a name="l00138"></a>00138 <span class="keywordtype">void</span> CWsClient::ConstructL()
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<a name="l00139"></a>00139         {
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<a name="l00140"></a>00140         <span class="comment">// add ourselves to active scheduler </span>
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<a name="l00141"></a>00141         CActiveScheduler::Add(<span class="keyword">this</span>);
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<a name="l00142"></a>00142         <span class="comment">// get a session going</span>
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<a name="l00143"></a>00143         User::LeaveIfError(iWs.Connect());
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<a name="l00144"></a>00144         <span class="comment">// construct our one and only window group</span>
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<a name="l00145"></a>00145         iGroup=RWindowGroup(iWs);
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<a name="l00146"></a>00146         User::LeaveIfError(iGroup.Construct(2,ETrue)); <span class="comment">// &#39;2&#39; is a meaningless handle</span>
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<a name="l00147"></a>00147         <span class="comment">// construct screen device and graphics context</span>
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<a name="l00148"></a>00148         iScreen=<span class="keyword">new</span> (ELeave) CWsScreenDevice(iWs); <span class="comment">// make device for this session</span>
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<a name="l00149"></a>00149         User::LeaveIfError(iScreen-&gt;Construct()); <span class="comment">// and complete its construction</span>
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<a name="l00150"></a>00150         User::LeaveIfError(iScreen-&gt;CreateContext(iGc)); <span class="comment">// create graphics context</span>
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<a name="l00151"></a>00151         <span class="comment">// construct redrawer</span>
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<a name="l00152"></a>00152         iRedrawer=<span class="keyword">new</span> (ELeave) CWsRedrawer;
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<a name="l00153"></a>00153         iRedrawer-&gt;ConstructL(<span class="keyword">this</span>);
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<a name="l00154"></a>00154         <span class="comment">// construct main window</span>
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<a name="l00155"></a>00155         ConstructMainWindowL();
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<a name="l00156"></a>00156         <span class="comment">// request first event and start scheduler</span>
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<a name="l00157"></a>00157         IssueRequest();
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<a name="l00158"></a>00158         }
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<a name="l00159"></a>00159
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<a name="l00160"></a>00160 CWsClient::~CWsClient()
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<a name="l00161"></a>00161         {
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<a name="l00162"></a>00162         <span class="comment">// neutralize us as an active object</span>
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<a name="l00163"></a>00163         Deque(); <span class="comment">// cancels and removes from scheduler</span>
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<a name="l00164"></a>00164         <span class="comment">// get rid of everything we allocated</span>
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<a name="l00165"></a>00165         <span class="keyword">delete</span> iGc;
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<a name="l00166"></a>00166         <span class="keyword">delete</span> iScreen;
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<a name="l00167"></a>00167         <span class="keyword">delete</span> iRedrawer;
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<a name="l00168"></a>00168         <span class="comment">// destroy window group</span>
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<a name="l00169"></a>00169         iGroup.Close(); <span class="comment">// what&#39;s the difference between this and destroy?</span>
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<a name="l00170"></a>00170         <span class="comment">// finish with window server</span>
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<a name="l00171"></a>00171         iWs.Close();
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<a name="l00172"></a>00172         }
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<a name="l00173"></a>00173
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<a name="l00174"></a>00174 <span class="keywordtype">void</span> CWsClient::IssueRequest()
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<a name="l00175"></a>00175         {
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<a name="l00176"></a>00176         iWs.EventReady(&amp;iStatus); <span class="comment">// request an event</span>
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<a name="l00177"></a>00177         SetActive(); <span class="comment">// so we&#39;re now active</span>
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<a name="l00178"></a>00178         }
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<a name="l00179"></a>00179
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<a name="l00180"></a>00180 <span class="keywordtype">void</span> CWsClient::DoCancel()
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<a name="l00181"></a>00181         {
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<a name="l00182"></a>00182         iWs.EventReadyCancel(); <span class="comment">// cancel event request</span>
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<a name="l00183"></a>00183         }
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<a name="l00184"></a>00184
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<a name="l00185"></a>00185 <span class="keywordtype">void</span> CWsClient::ConstructMainWindowL()
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<a name="l00186"></a>00186         {
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<a name="l00187"></a>00187         }
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<a name="l00188"></a>00188
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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