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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_zoom_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Tue, 20 Jul 2010 12:00:49 +0100
changeset 13 48780e181b38
parent 6 43e37759235e
permissions -rw-r--r--
Week 28 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 1897 and Bug 1522.
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/GraphicsShell/Zoom.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/GraphicsShell/Zoom.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>
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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 &quot;GraphicsControl.h&quot;</span>
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018 <span class="comment">// header for multi-bitmap file grbitmap.mbm containing 2 bitmaps to use</span>
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<a name="l00019"></a>00019 <span class="preprocessor">#include &lt;grbmap2.mbg&gt;</span>
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<a name="l00020"></a>00020
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<a name="l00021"></a>00021 <span class="preprocessor">#include &lt;coemain.h&gt;</span>
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<a name="l00022"></a>00022
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<a name="l00023"></a>00023 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCDrive,<span class="stringliteral">&quot;\\&quot;</span>);
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<a name="l00024"></a>00024 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtZDrive,<span class="stringliteral">&quot;Z:&quot;</span>);
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026 <span class="keywordtype">void</span> CZoomControl::LoadBitmapL(CFbsBitmap* aBitMap,<span class="keyword">const</span> TDesC&amp; aPathAndFile,TInt aId,TBool aShareIfLoaded)
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<a name="l00027"></a>00027         {
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<a name="l00028"></a>00028         TParse mbfn;
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<a name="l00029"></a>00029
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<a name="l00030"></a>00030         mbfn.Set(aPathAndFile,&amp;KTxtCDrive,NULL);
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<a name="l00031"></a>00031         <span class="keywordflow">if</span> (!aBitMap-&gt;Load(mbfn.FullName(),aId,aShareIfLoaded))
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<a name="l00032"></a>00032                 <span class="keywordflow">return</span>;
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<a name="l00033"></a>00033
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<a name="l00034"></a>00034         mbfn.Set(aPathAndFile,&amp;KTxtZDrive,NULL);
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<a name="l00035"></a>00035         User::LeaveIfError(aBitMap-&gt;Load(mbfn.FullName(),aId,aShareIfLoaded));
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<a name="l00036"></a>00036         <span class="keywordflow">return</span>;
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<a name="l00037"></a>00037         }
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<a name="l00038"></a>00038
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<a name="l00039"></a>00039 <span class="comment">// Name of the multi-bitmap file containing the bitmap</span>
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<a name="l00040"></a>00040 <span class="comment">// and bitmap mask files</span>
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<a name="l00041"></a>00041 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFileName,<span class="stringliteral">&quot;\\resource\\apps\\grbmap2.mbm&quot;</span>);
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<a name="l00042"></a>00042
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<a name="l00043"></a>00043 <span class="keywordtype">void</span> CZoomControl::UpdateModelL()
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<a name="l00044"></a>00044         {
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<a name="l00045"></a>00045         <span class="comment">// set up name for bitmap sharing</span>
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<a name="l00046"></a>00046         TBool shareIfLoaded(ETrue);
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<a name="l00047"></a>00047
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<a name="l00048"></a>00048         <span class="comment">// set up two zoom factor objects (one for examples, one for commentary)</span>
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<a name="l00049"></a>00049         iLeftZf.SetGraphicsDeviceMap(iCoeEnv-&gt;ScreenDevice());
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<a name="l00050"></a>00050         iRightZf.SetGraphicsDeviceMap(iCoeEnv-&gt;ScreenDevice());
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<a name="l00051"></a>00051         <span class="comment">//iLeftZf.SetDevice(iCoeEnv-&gt;ScreenDevice());</span>
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<a name="l00052"></a>00052         <span class="comment">//iRightZf.SetDevice(iCoeEnv-&gt;ScreenDevice());</span>
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<a name="l00053"></a>00053
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<a name="l00054"></a>00054         <span class="comment">// set the zoom factor of the objects (example is dependent on phase of example, commentary is fixed)</span>
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<a name="l00055"></a>00055         iLeftZf.SetZoomFactor(TZoomFactor::EZoomOneToOne*2*(Phase()+1)/5);
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<a name="l00056"></a>00056         iRightZf.SetZoomFactor(TZoomFactor::EZoomOneToOne*2*(5-Phase())/5);
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<a name="l00057"></a>00057
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<a name="l00058"></a>00058         <span class="comment">// use graphics device maps for drawing and getting fonts</span>
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<a name="l00059"></a>00059         iLeftMap=&amp;iLeftZf;
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<a name="l00060"></a>00060         iRightMap=&amp;iRightZf;
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<a name="l00061"></a>00061
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<a name="l00062"></a>00062         <span class="keywordflow">if</span> (Phase()==0) {
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<a name="l00063"></a>00063                 iBitmap = <span class="keyword">new</span> (ELeave) CFbsBitmap();
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<a name="l00064"></a>00064                 LoadBitmapL(iBitmap,KTxtFileName,EMbmGrbmap2Smiley,shareIfLoaded);
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<a name="l00065"></a>00065         }
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<a name="l00066"></a>00066
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<a name="l00067"></a>00067         <span class="comment">// set up descriptor for commentary area</span>
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<a name="l00068"></a>00068         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat1,<span class="stringliteral">&quot;Left zoom factor=%1.1f:1  Right zoom factor=%1.1f:1&quot;</span>);
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<a name="l00069"></a>00069         TBuf&lt;128&gt; commentaryText;
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<a name="l00070"></a>00070         TReal leftValue = 2*(Phase()+1)/5.0;
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<a name="l00071"></a>00071         TReal rightValue = 2*(5-Phase())/5.0;
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<a name="l00072"></a>00072         commentaryText.Format(KFormat1,leftValue,rightValue);
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<a name="l00073"></a>00073         iGraphObserver-&gt;NotifyStatus(commentaryText);
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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 <span class="keywordtype">void</span> CZoomControl::Draw(<span class="keyword">const</span> TRect&amp; <span class="comment">/* aRect */</span>)<span class="keyword"> const</span>
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<a name="l00077"></a>00077 <span class="keyword">        </span>{
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<a name="l00078"></a>00078         <span class="comment">// setup screen for example: get graphics context and draw surrounding rectangle</span>
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<a name="l00079"></a>00079         CWindowGc&amp; gc=SystemGc();
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<a name="l00080"></a>00080         gc.Clear();
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<a name="l00081"></a>00081
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<a name="l00082"></a>00082         <span class="comment">// create a centered rectangle of the default size</span>
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<a name="l00083"></a>00083         TRect screenRect=Rect();
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<a name="l00084"></a>00084         TInt bisect = (screenRect.iBr.iX-screenRect.iTl.iX)/2 + screenRect.iTl.iX;
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<a name="l00085"></a>00085         TRect leftRect(screenRect.iTl,TPoint(bisect,screenRect.iBr.iY));
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<a name="l00086"></a>00086         TRect rightRect(TPoint(bisect,screenRect.iTl.iY),screenRect.iBr);
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<a name="l00087"></a>00087
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<a name="l00088"></a>00088         DrawLeft(leftRect,gc);
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<a name="l00089"></a>00089         DrawRight(rightRect,gc);
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<a name="l00090"></a>00090         }
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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         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtTimesNewRoman,<span class="stringliteral">&quot;Times New Roman&quot;</span>);
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<a name="l00094"></a>00094         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtGrzoomExampleText,<span class="stringliteral">&quot;grzoom example text&quot;</span>);
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<a name="l00095"></a>00095
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<a name="l00096"></a>00096 <span class="keywordtype">void</span> CZoomControl::DrawLeft(TRect screenRect,CWindowGc&amp; SystemGc)<span class="keyword"> const</span>
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<a name="l00097"></a>00097 <span class="keyword">        </span>{
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<a name="l00098"></a>00098         <span class="comment">// set up absolute font-spec and text box for 200 twip Times font</span>
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<a name="l00099"></a>00099         TFontSpec fontSpec(KTxtTimesNewRoman,200);
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<a name="l00100"></a>00100         <span class="comment">// find the nearest font to the specified one</span>
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<a name="l00101"></a>00101         CFont* screenFont;
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<a name="l00102"></a>00102         iLeftMap-&gt;GetNearestFontInTwips(screenFont,fontSpec);
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<a name="l00103"></a>00103         <span class="comment">// use it for this graphics context</span>
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<a name="l00104"></a>00104         SystemGc.UseFont(screenFont);
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<a name="l00105"></a>00105         <span class="comment">// get height of screen box</span>
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<a name="l00106"></a>00106     TInt screenHeight=screenRect.Height();
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<a name="l00107"></a>00107         <span class="comment">// get font height</span>
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<a name="l00108"></a>00108     TInt textHeight = screenFont-&gt;HeightInPixels();
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<a name="l00109"></a>00109         <span class="comment">// 1/2 font height below halfway down box</span>
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<a name="l00110"></a>00110     TInt exampleOffset=(screenHeight+textHeight)/2;
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<a name="l00111"></a>00111     TInt exampleMargin=0;
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<a name="l00112"></a>00112     SystemGc.DrawText(KTxtGrzoomExampleText,screenRect,exampleOffset,CGraphicsContext::ECenter,exampleMargin);
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<a name="l00113"></a>00113         <span class="comment">// discard and release font</span>
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<a name="l00114"></a>00114         SystemGc.DiscardFont();
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<a name="l00115"></a>00115         iLeftMap-&gt;ReleaseFont(screenFont);
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<a name="l00116"></a>00116
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<a name="l00117"></a>00117         <span class="comment">// set up example box in twips</span>
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<a name="l00118"></a>00118         TRect boxInTwips(TPoint(0,0),TPoint(500,300));
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<a name="l00119"></a>00119         <span class="comment">// convert rectangle co-ordinates into pixels</span>
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<a name="l00120"></a>00120         TRect boxInPixels = iLeftMap-&gt;TwipsToPixels(boxInTwips);
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<a name="l00121"></a>00121         SystemGc.DrawRect(boxInPixels);
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<a name="l00122"></a>00122
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<a name="l00123"></a>00123         <span class="comment">// set up rectangle for bitmap to be stretched into</span>
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<a name="l00124"></a>00124         TRect bitmapRectInTwips(TPoint(0,0),TPoint(500,500));
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<a name="l00125"></a>00125         TRect bitmapRectInPixels = iLeftMap-&gt;TwipsToPixels(bitmapRectInTwips);
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<a name="l00126"></a>00126         bitmapRectInPixels.iTl.iY+=125;
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<a name="l00127"></a>00127         bitmapRectInPixels.iBr.iY+=125;
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<a name="l00128"></a>00128         bitmapRectInPixels.iTl.iX+=100;
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<a name="l00129"></a>00129         bitmapRectInPixels.iBr.iX+=100;
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<a name="l00130"></a>00130         <span class="comment">// draw the bitmap, stretched into the rectangle</span>
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<a name="l00131"></a>00131         SystemGc.DrawBitmap(bitmapRectInPixels, iBitmap);
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<a name="l00132"></a>00132         }
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<a name="l00133"></a>00133
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<a name="l00134"></a>00134 <span class="keywordtype">void</span> CZoomControl::DrawRight(TRect screenRect,CWindowGc&amp; SystemGc)<span class="keyword"> const</span>
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<a name="l00135"></a>00135 <span class="keyword">        </span>{
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<a name="l00136"></a>00136         <span class="comment">// set up colors: black and a white RGB color</span>
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<a name="l00137"></a>00137         TRgb black(0,0,0);
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<a name="l00138"></a>00138         TRgb white(255,255,255); <span class="comment">// appears as blank screen gray-green color</span>
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<a name="l00139"></a>00139     SystemGc.SetBrushStyle(CGraphicsContext::ESolidBrush);
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<a name="l00140"></a>00140     SystemGc.SetBrushColor(black);
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<a name="l00141"></a>00141     SystemGc.SetPenColor(white);
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<a name="l00142"></a>00142
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<a name="l00143"></a>00143         <span class="comment">// set up absolute font-spec and text box for 200 twip Times font</span>
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<a name="l00144"></a>00144         TFontSpec fontSpec(KTxtTimesNewRoman,200);
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<a name="l00145"></a>00145         <span class="comment">// find the nearest font to the specified one</span>
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<a name="l00146"></a>00146         CFont* commentFont;
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<a name="l00147"></a>00147         iRightMap-&gt;GetNearestFontInTwips(commentFont,fontSpec);
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<a name="l00148"></a>00148         <span class="comment">// use it for this graphics context</span>
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<a name="l00149"></a>00149         SystemGc.UseFont(commentFont);
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<a name="l00150"></a>00150         <span class="comment">// get font height</span>
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<a name="l00151"></a>00151     TInt textHeight = commentFont-&gt;HeightInPixels();
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<a name="l00152"></a>00152     <span class="comment">// get height of text box</span>
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<a name="l00153"></a>00153     TInt boxHeight=screenRect.Height();
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<a name="l00154"></a>00154         <span class="comment">// 1/2 font height below halfway down box</span>
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<a name="l00155"></a>00155     TInt commentOffset=(boxHeight+textHeight)/2;
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<a name="l00156"></a>00156     TInt commentMargin=0;
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<a name="l00157"></a>00157         <span class="comment">// draw text</span>
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<a name="l00158"></a>00158     SystemGc.DrawText(KTxtGrzoomExampleText,screenRect,commentOffset,CGraphicsContext::ECenter,commentMargin);
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<a name="l00159"></a>00159         <span class="comment">// discard and release font</span>
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<a name="l00160"></a>00160         SystemGc.DiscardFont();
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<a name="l00161"></a>00161         iRightMap-&gt;ReleaseFont(commentFont);
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<a name="l00162"></a>00162
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<a name="l00163"></a>00163         <span class="comment">// set up example box in twips</span>
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<a name="l00164"></a>00164         TRect boxInTwips(TPoint(0,0),TPoint(500,300));
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<a name="l00165"></a>00165         <span class="comment">// convert rectangle co-ordinates into pixels</span>
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<a name="l00166"></a>00166         TRect boxInPixels = iRightMap-&gt;TwipsToPixels(boxInTwips);
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<a name="l00167"></a>00167         boxInPixels.Move(screenRect.iTl);
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<a name="l00168"></a>00168         SystemGc.DrawRect(boxInPixels);
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<a name="l00169"></a>00169
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<a name="l00170"></a>00170         <span class="comment">// set up rectangle for bitmap to be stretched into</span>
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<a name="l00171"></a>00171         TRect bitmapRectInTwips(TPoint(0,0),TPoint(500,500));
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<a name="l00172"></a>00172         TRect bitmapRectInPixels = iRightMap-&gt;TwipsToPixels(bitmapRectInTwips);
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<a name="l00173"></a>00173         bitmapRectInPixels.Move(screenRect.iTl);
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<a name="l00174"></a>00174         bitmapRectInPixels.iTl.iY+=125;
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<a name="l00175"></a>00175         bitmapRectInPixels.iBr.iY+=125;
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<a name="l00176"></a>00176         bitmapRectInPixels.iTl.iX+=100;
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<a name="l00177"></a>00177         bitmapRectInPixels.iBr.iX+=100;
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<a name="l00178"></a>00178         <span class="comment">// draw the bitmap, stretched into the rectangle</span>
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<a name="l00179"></a>00179         SystemGc.DrawBitmap(bitmapRectInPixels, iBitmap);
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<a name="l00180"></a>00180         }
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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>
FCL/sftools/depl/docscontent