Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_c_direct_display_life_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/Graphics/WS/Direct/CDirectDisplayLife.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">//</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="preprocessor">#include <coemain.h></span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="preprocessor">#include "CDirectDisplayLife.h"</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="comment">// Dimension of each cell</span>
<a name="l00021"></a>00021 <span class="keyword">const</span> TInt CDirectDisplayLife::KBlockSize = 20;
<a name="l00022"></a>00022 <span class="comment">// Delay between generations (microseconds)</span>
<a name="l00023"></a>00023 <span class="comment">// Actual minimum is 1/10s on WINS</span>
<a name="l00024"></a>00024 <span class="keyword">const</span> TInt CDirectDisplayLife::KGenerationInterval = 70000;
<a name="l00025"></a>00025 <span class="comment">// X & Y origins of upper left of cell display</span>
<a name="l00026"></a>00026 <span class="keyword">const</span> TInt CDirectDisplayLife::iXOrigin = 50;
<a name="l00027"></a>00027 <span class="keyword">const</span> TInt CDirectDisplayLife::iYOrigin = 30;
<a name="l00028"></a>00028
<a name="l00029"></a>00029 CDirectDisplayLife::CDirectDisplayLife(RWsSession& aClient,
<a name="l00030"></a>00030 RWindow& aWindow,
<a name="l00031"></a>00031 CLifeEngine& aLifeEngine)
<a name="l00032"></a>00032 : CTimer(CActive::EPriorityStandard),
<a name="l00033"></a>00033 iClient(aClient),
<a name="l00034"></a>00034 iWindow(aWindow),
<a name="l00035"></a>00035 iLifeEngine(aLifeEngine)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 }
<a name="l00038"></a>00038
<a name="l00039"></a>00039 CDirectDisplayLife::~CDirectDisplayLife()
<a name="l00040"></a>00040 {
<a name="l00041"></a>00041 Cancel();
<a name="l00042"></a>00042 <span class="keyword">delete</span> iDirectScreenAccess;
<a name="l00043"></a>00043 }
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="keywordtype">void</span> CDirectDisplayLife::ConstructL()
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047 CTimer::ConstructL();
<a name="l00048"></a>00048 <span class="comment">// Create the DSA object</span>
<a name="l00049"></a>00049 iDirectScreenAccess = CDirectScreenAccess::NewL(
<a name="l00050"></a>00050 iClient, <span class="comment">// WS session</span>
<a name="l00051"></a>00051 *(CCoeEnv::Static()->ScreenDevice()), <span class="comment">// CWsScreenDevice</span>
<a name="l00052"></a>00052 iWindow, <span class="comment">// RWindowBase</span>
<a name="l00053"></a>00053 *<span class="keyword">this</span> <span class="comment">// MDirectScreenAccess</span>
<a name="l00054"></a>00054 );
<a name="l00055"></a>00055
<a name="l00056"></a>00056 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">// Start game display</span>
<a name="l00060"></a>00060 <span class="keywordtype">void</span> CDirectDisplayLife::StartL()
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 <span class="comment">// Initialise DSA</span>
<a name="l00063"></a>00063 iDirectScreenAccess -> StartL();
<a name="l00064"></a>00064 <span class="comment">// Get graphics context for it</span>
<a name="l00065"></a>00065 iGc = iDirectScreenAccess -> Gc();
<a name="l00066"></a>00066 iGc -> SetBrushStyle(CGraphicsContext::ESolidBrush);
<a name="l00067"></a>00067 <span class="comment">// Get region that DSA can draw in</span>
<a name="l00068"></a>00068 iRegion = iDirectScreenAccess -> DrawingRegion();
<a name="l00069"></a>00069 <span class="comment">// Set the display to clip to this region</span>
<a name="l00070"></a>00070 iGc -> SetClippingRegion(iRegion);
<a name="l00071"></a>00071
<a name="l00072"></a>00072 After(TTimeIntervalMicroSeconds32(KGenerationInterval));
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="comment">// Implement MDirectScreenAccess</span>
<a name="l00076"></a>00076 <span class="keywordtype">void</span> CDirectDisplayLife::Restart(RDirectScreenAccess::TTerminationReasons <span class="comment">/*aReason*/</span>)
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 <span class="comment">// Restart display</span>
<a name="l00079"></a>00079 <span class="comment">// Note that this will result in the clipping region being updated</span>
<a name="l00080"></a>00080 <span class="comment">// so that menus, overlaying dialogs, etc. will not be drawn over</span>
<a name="l00081"></a>00081 TRAPD(err,StartL());
<a name="l00082"></a>00082 <span class="keywordflow">if</span>(err != KErrNone)
<a name="l00083"></a>00083 {
<a name="l00084"></a>00084 User::Panic(_L(<span class="stringliteral">"Failed to Restart display"</span>),err);
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="keywordtype">void</span> CDirectDisplayLife::AbortNow(RDirectScreenAccess::TTerminationReasons <span class="comment">/*aReason*/</span>)
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 <span class="comment">// Cancel timer and display</span>
<a name="l00091"></a>00091 Cancel();
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="comment">// Draw cells using DSA</span>
<a name="l00095"></a>00095 <span class="keywordtype">void</span> CDirectDisplayLife::RunL()
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 <span class="comment">// Update engine</span>
<a name="l00098"></a>00098 iLifeEngine.AddGeneration();
<a name="l00099"></a>00099 <span class="keyword">const</span> TCellArray& iCells = iLifeEngine.GetCellArray();
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="comment">// Loop through cells drawing each</span>
<a name="l00102"></a>00102 TRect drawBlock(iXOrigin, iYOrigin, iXOrigin+KBlockSize,iYOrigin+KBlockSize);
<a name="l00103"></a>00103 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y=0; y<DIM_Y_ARRAY; y++)
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x=0; x<DIM_X_ARRAY; x++)
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107 <span class="keywordflow">if</span> (iCells[x][y])
<a name="l00108"></a>00108 iGc -> SetBrushColor(KRgbBlue);
<a name="l00109"></a>00109 <span class="keywordflow">else</span>
<a name="l00110"></a>00110 iGc -> SetBrushColor(KRgbYellow);
<a name="l00111"></a>00111 iGc -> DrawRect(drawBlock);
<a name="l00112"></a>00112 drawBlock.Move(KBlockSize,0);
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="comment">// Redraw the changed areas</span>
<a name="l00115"></a>00115 TPoint modified;
<a name="l00116"></a>00116 modified.iX = iXOrigin+KBlockSize;
<a name="l00117"></a>00117 modified.iY = iYOrigin+KBlockSize;
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="comment">// Update the screen for the areas that have been redrawn</span>
<a name="l00120"></a>00120 iDirectScreenAccess->ScreenDevice()->Update();
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122 drawBlock.iTl.iX = iXOrigin;
<a name="l00123"></a>00123 drawBlock.iBr.iX = iXOrigin+KBlockSize;
<a name="l00124"></a>00124 drawBlock.Move(0,KBlockSize);
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 iClient.Flush();
<a name="l00127"></a>00127 <span class="comment">// Renew request</span>
<a name="l00128"></a>00128 After(TTimeIntervalMicroSeconds32(KGenerationInterval));
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="keywordtype">void</span> CDirectDisplayLife::DoCancel()
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 <span class="comment">// Cancel timer</span>
<a name="l00134"></a>00134 CTimer::DoCancel();
<a name="l00135"></a>00135 <span class="comment">// Cancel DSA</span>
<a name="l00136"></a>00136 iDirectScreenAccess -> Cancel();
<a name="l00137"></a>00137 }
<a name="l00138"></a>00138
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