Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_zoom_8cpp_source.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>TB9.2 Example Applications: examples/Graphics/GraphicsShell/Zoom.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.6.2 -->
<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>
<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 "GraphicsControl.h"</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="comment">// header for multi-bitmap file grbitmap.mbm containing 2 bitmaps to use</span>
<a name="l00019"></a>00019 <span class="preprocessor">#include <grbmap2.mbg></span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#include <coemain.h></span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCDrive,<span class="stringliteral">"\\"</span>);
<a name="l00024"></a>00024 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtZDrive,<span class="stringliteral">"Z:"</span>);
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="keywordtype">void</span> CZoomControl::LoadBitmapL(CFbsBitmap* aBitMap,<span class="keyword">const</span> TDesC& aPathAndFile,TInt aId,TBool aShareIfLoaded)
<a name="l00027"></a>00027 {
<a name="l00028"></a>00028 TParse mbfn;
<a name="l00029"></a>00029
<a name="l00030"></a>00030 mbfn.Set(aPathAndFile,&KTxtCDrive,NULL);
<a name="l00031"></a>00031 <span class="keywordflow">if</span> (!aBitMap->Load(mbfn.FullName(),aId,aShareIfLoaded))
<a name="l00032"></a>00032 <span class="keywordflow">return</span>;
<a name="l00033"></a>00033
<a name="l00034"></a>00034 mbfn.Set(aPathAndFile,&KTxtZDrive,NULL);
<a name="l00035"></a>00035 User::LeaveIfError(aBitMap->Load(mbfn.FullName(),aId,aShareIfLoaded));
<a name="l00036"></a>00036 <span class="keywordflow">return</span>;
<a name="l00037"></a>00037 }
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="comment">// Name of the multi-bitmap file containing the bitmap</span>
<a name="l00040"></a>00040 <span class="comment">// and bitmap mask files</span>
<a name="l00041"></a>00041 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFileName,<span class="stringliteral">"\\resource\\apps\\grbmap2.mbm"</span>);
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keywordtype">void</span> CZoomControl::UpdateModelL()
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045 <span class="comment">// set up name for bitmap sharing</span>
<a name="l00046"></a>00046 TBool shareIfLoaded(ETrue);
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="comment">// set up two zoom factor objects (one for examples, one for commentary)</span>
<a name="l00049"></a>00049 iLeftZf.SetGraphicsDeviceMap(iCoeEnv->ScreenDevice());
<a name="l00050"></a>00050 iRightZf.SetGraphicsDeviceMap(iCoeEnv->ScreenDevice());
<a name="l00051"></a>00051 <span class="comment">//iLeftZf.SetDevice(iCoeEnv->ScreenDevice());</span>
<a name="l00052"></a>00052 <span class="comment">//iRightZf.SetDevice(iCoeEnv->ScreenDevice());</span>
<a name="l00053"></a>00053
<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>
<a name="l00055"></a>00055 iLeftZf.SetZoomFactor(TZoomFactor::EZoomOneToOne*2*(Phase()+1)/5);
<a name="l00056"></a>00056 iRightZf.SetZoomFactor(TZoomFactor::EZoomOneToOne*2*(5-Phase())/5);
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="comment">// use graphics device maps for drawing and getting fonts</span>
<a name="l00059"></a>00059 iLeftMap=&iLeftZf;
<a name="l00060"></a>00060 iRightMap=&iRightZf;
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="keywordflow">if</span> (Phase()==0) {
<a name="l00063"></a>00063 iBitmap = <span class="keyword">new</span> (ELeave) CFbsBitmap();
<a name="l00064"></a>00064 LoadBitmapL(iBitmap,KTxtFileName,EMbmGrbmap2Smiley,shareIfLoaded);
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="comment">// set up descriptor for commentary area</span>
<a name="l00068"></a>00068 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat1,<span class="stringliteral">"Left zoom factor=%1.1f:1 Right zoom factor=%1.1f:1"</span>);
<a name="l00069"></a>00069 TBuf<128> commentaryText;
<a name="l00070"></a>00070 TReal leftValue = 2*(Phase()+1)/5.0;
<a name="l00071"></a>00071 TReal rightValue = 2*(5-Phase())/5.0;
<a name="l00072"></a>00072 commentaryText.Format(KFormat1,leftValue,rightValue);
<a name="l00073"></a>00073 iGraphObserver->NotifyStatus(commentaryText);
<a name="l00074"></a>00074 };
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="keywordtype">void</span> CZoomControl::Draw(<span class="keyword">const</span> TRect& <span class="comment">/* aRect */</span>)<span class="keyword"> const</span>
<a name="l00077"></a>00077 <span class="keyword"> </span>{
<a name="l00078"></a>00078 <span class="comment">// setup screen for example: get graphics context and draw surrounding rectangle</span>
<a name="l00079"></a>00079 CWindowGc& gc=SystemGc();
<a name="l00080"></a>00080 gc.Clear();
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <span class="comment">// create a centered rectangle of the default size</span>
<a name="l00083"></a>00083 TRect screenRect=Rect();
<a name="l00084"></a>00084 TInt bisect = (screenRect.iBr.iX-screenRect.iTl.iX)/2 + screenRect.iTl.iX;
<a name="l00085"></a>00085 TRect leftRect(screenRect.iTl,TPoint(bisect,screenRect.iBr.iY));
<a name="l00086"></a>00086 TRect rightRect(TPoint(bisect,screenRect.iTl.iY),screenRect.iBr);
<a name="l00087"></a>00087
<a name="l00088"></a>00088 DrawLeft(leftRect,gc);
<a name="l00089"></a>00089 DrawRight(rightRect,gc);
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtTimesNewRoman,<span class="stringliteral">"Times New Roman"</span>);
<a name="l00094"></a>00094 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtGrzoomExampleText,<span class="stringliteral">"grzoom example text"</span>);
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="keywordtype">void</span> CZoomControl::DrawLeft(TRect screenRect,CWindowGc& SystemGc)<span class="keyword"> const</span>
<a name="l00097"></a>00097 <span class="keyword"> </span>{
<a name="l00098"></a>00098 <span class="comment">// set up absolute font-spec and text box for 200 twip Times font</span>
<a name="l00099"></a>00099 TFontSpec fontSpec(KTxtTimesNewRoman,200);
<a name="l00100"></a>00100 <span class="comment">// find the nearest font to the specified one</span>
<a name="l00101"></a>00101 CFont* screenFont;
<a name="l00102"></a>00102 iLeftMap->GetNearestFontInTwips(screenFont,fontSpec);
<a name="l00103"></a>00103 <span class="comment">// use it for this graphics context</span>
<a name="l00104"></a>00104 SystemGc.UseFont(screenFont);
<a name="l00105"></a>00105 <span class="comment">// get height of screen box</span>
<a name="l00106"></a>00106 TInt screenHeight=screenRect.Height();
<a name="l00107"></a>00107 <span class="comment">// get font height</span>
<a name="l00108"></a>00108 TInt textHeight = screenFont->HeightInPixels();
<a name="l00109"></a>00109 <span class="comment">// 1/2 font height below halfway down box</span>
<a name="l00110"></a>00110 TInt exampleOffset=(screenHeight+textHeight)/2;
<a name="l00111"></a>00111 TInt exampleMargin=0;
<a name="l00112"></a>00112 SystemGc.DrawText(KTxtGrzoomExampleText,screenRect,exampleOffset,CGraphicsContext::ECenter,exampleMargin);
<a name="l00113"></a>00113 <span class="comment">// discard and release font</span>
<a name="l00114"></a>00114 SystemGc.DiscardFont();
<a name="l00115"></a>00115 iLeftMap->ReleaseFont(screenFont);
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="comment">// set up example box in twips</span>
<a name="l00118"></a>00118 TRect boxInTwips(TPoint(0,0),TPoint(500,300));
<a name="l00119"></a>00119 <span class="comment">// convert rectangle co-ordinates into pixels</span>
<a name="l00120"></a>00120 TRect boxInPixels = iLeftMap->TwipsToPixels(boxInTwips);
<a name="l00121"></a>00121 SystemGc.DrawRect(boxInPixels);
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">// set up rectangle for bitmap to be stretched into</span>
<a name="l00124"></a>00124 TRect bitmapRectInTwips(TPoint(0,0),TPoint(500,500));
<a name="l00125"></a>00125 TRect bitmapRectInPixels = iLeftMap->TwipsToPixels(bitmapRectInTwips);
<a name="l00126"></a>00126 bitmapRectInPixels.iTl.iY+=125;
<a name="l00127"></a>00127 bitmapRectInPixels.iBr.iY+=125;
<a name="l00128"></a>00128 bitmapRectInPixels.iTl.iX+=100;
<a name="l00129"></a>00129 bitmapRectInPixels.iBr.iX+=100;
<a name="l00130"></a>00130 <span class="comment">// draw the bitmap, stretched into the rectangle</span>
<a name="l00131"></a>00131 SystemGc.DrawBitmap(bitmapRectInPixels, iBitmap);
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="keywordtype">void</span> CZoomControl::DrawRight(TRect screenRect,CWindowGc& SystemGc)<span class="keyword"> const</span>
<a name="l00135"></a>00135 <span class="keyword"> </span>{
<a name="l00136"></a>00136 <span class="comment">// set up colors: black and a white RGB color</span>
<a name="l00137"></a>00137 TRgb black(0,0,0);
<a name="l00138"></a>00138 TRgb white(255,255,255); <span class="comment">// appears as blank screen gray-green color</span>
<a name="l00139"></a>00139 SystemGc.SetBrushStyle(CGraphicsContext::ESolidBrush);
<a name="l00140"></a>00140 SystemGc.SetBrushColor(black);
<a name="l00141"></a>00141 SystemGc.SetPenColor(white);
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="comment">// set up absolute font-spec and text box for 200 twip Times font</span>
<a name="l00144"></a>00144 TFontSpec fontSpec(KTxtTimesNewRoman,200);
<a name="l00145"></a>00145 <span class="comment">// find the nearest font to the specified one</span>
<a name="l00146"></a>00146 CFont* commentFont;
<a name="l00147"></a>00147 iRightMap->GetNearestFontInTwips(commentFont,fontSpec);
<a name="l00148"></a>00148 <span class="comment">// use it for this graphics context</span>
<a name="l00149"></a>00149 SystemGc.UseFont(commentFont);
<a name="l00150"></a>00150 <span class="comment">// get font height</span>
<a name="l00151"></a>00151 TInt textHeight = commentFont->HeightInPixels();
<a name="l00152"></a>00152 <span class="comment">// get height of text box</span>
<a name="l00153"></a>00153 TInt boxHeight=screenRect.Height();
<a name="l00154"></a>00154 <span class="comment">// 1/2 font height below halfway down box</span>
<a name="l00155"></a>00155 TInt commentOffset=(boxHeight+textHeight)/2;
<a name="l00156"></a>00156 TInt commentMargin=0;
<a name="l00157"></a>00157 <span class="comment">// draw text</span>
<a name="l00158"></a>00158 SystemGc.DrawText(KTxtGrzoomExampleText,screenRect,commentOffset,CGraphicsContext::ECenter,commentMargin);
<a name="l00159"></a>00159 <span class="comment">// discard and release font</span>
<a name="l00160"></a>00160 SystemGc.DiscardFont();
<a name="l00161"></a>00161 iRightMap->ReleaseFont(commentFont);
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="comment">// set up example box in twips</span>
<a name="l00164"></a>00164 TRect boxInTwips(TPoint(0,0),TPoint(500,300));
<a name="l00165"></a>00165 <span class="comment">// convert rectangle co-ordinates into pixels</span>
<a name="l00166"></a>00166 TRect boxInPixels = iRightMap->TwipsToPixels(boxInTwips);
<a name="l00167"></a>00167 boxInPixels.Move(screenRect.iTl);
<a name="l00168"></a>00168 SystemGc.DrawRect(boxInPixels);
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="comment">// set up rectangle for bitmap to be stretched into</span>
<a name="l00171"></a>00171 TRect bitmapRectInTwips(TPoint(0,0),TPoint(500,500));
<a name="l00172"></a>00172 TRect bitmapRectInPixels = iRightMap->TwipsToPixels(bitmapRectInTwips);
<a name="l00173"></a>00173 bitmapRectInPixels.Move(screenRect.iTl);
<a name="l00174"></a>00174 bitmapRectInPixels.iTl.iY+=125;
<a name="l00175"></a>00175 bitmapRectInPixels.iBr.iY+=125;
<a name="l00176"></a>00176 bitmapRectInPixels.iTl.iX+=100;
<a name="l00177"></a>00177 bitmapRectInPixels.iBr.iX+=100;
<a name="l00178"></a>00178 <span class="comment">// draw the bitmap, stretched into the rectangle</span>
<a name="l00179"></a>00179 SystemGc.DrawBitmap(bitmapRectInPixels, iBitmap);
<a name="l00180"></a>00180 }
</pre></div></div>
<hr size="1"/><address style="text-align: right;"><small>Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
</body>
</html>