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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>ImageHandler.h Source File</title><link href="style.css" rel="stylesheet" type="text/css"></head><table border="0" width="100%" height="8" bgcolor="#eeeeee"><tr> <td width="100%" height="1"><b><font size="2" color="#000000" face="Arial, Helvetica, sans-serif"><strong><a name=Top></a>S60 5th Edition SDK v0.9 </strong></font></b><br><i>Example Applications Guide</i></td></tr> </table><!-- Generated by Doxygen 1.4.5 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li id="current"><a href="files.html"><span>Files</span></a></li> </ul></div><h1>ImageHandler.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span><a name="l00002"></a>00002 <span class="comment">* ==============================================================================</span><a name="l00003"></a>00003 <span class="comment">* Name : ImageHandler.h</span><a name="l00004"></a>00004 <span class="comment">* Part of : OcrExample</span><a name="l00005"></a>00005 <span class="comment">* Interface :</span><a name="l00006"></a>00006 <span class="comment">* Description :</span><a name="l00007"></a>00007 <span class="comment">* Version :</span><a name="l00008"></a>00008 <span class="comment">*</span><a name="l00009"></a>00009 <span class="comment">* Copyright (c) 2006 Nokia Corporation.</span><a name="l00010"></a>00010 <span class="comment">* This material, including documentation and any related</span><a name="l00011"></a>00011 <span class="comment">* computer programs, is protected by copyright controlled by</span><a name="l00012"></a>00012 <span class="comment">* Nokia Corporation.</span><a name="l00013"></a>00013 <span class="comment">* ==============================================================================</span><a name="l00014"></a>00014 <span class="comment">*/</span><a name="l00015"></a>00015 <a name="l00016"></a>00016 <span class="preprocessor">#ifndef OCR_IMAGEHANDLER_H</span><a name="l00017"></a>00017 <span class="preprocessor"></span><span class="preprocessor">#define OCR_IMAGEHANDLER_H</span><a name="l00018"></a>00018 <span class="preprocessor"></span><a name="l00019"></a>00019 <span class="preprocessor">#include <f32file.h></span><a name="l00020"></a>00020 <span class="preprocessor">#include <ImageConversion.h></span><a name="l00021"></a>00021 <span class="preprocessor">#include <BitmapTransforms.h></span><a name="l00022"></a>00022 <span class="comment"></span><a name="l00023"></a>00023 <span class="comment">/**</span><a name="l00024"></a>00024 <span class="comment"> * namespace contains various utility classes</span><a name="l00025"></a>00025 <span class="comment"> */</span><a name="l00026"></a><a class="code" href="namespace_n_o_c_r_utils.html">00026</a> <span class="keyword">namespace </span>NOCRUtils<a name="l00027"></a>00027 {<a name="l00028"></a>00028 <span class="comment"></span><a name="l00029"></a>00029 <span class="comment">/**</span><a name="l00030"></a>00030 <span class="comment"> * Listener interface that can be used to listen for image loading operation</span><a name="l00031"></a>00031 <span class="comment"> * completion events from CImageHandler.</span><a name="l00032"></a>00032 <span class="comment"> *</span><a name="l00033"></a>00033 <span class="comment"> * The class is intended to be implemented by a client class that observes the</span><a name="l00034"></a>00034 <span class="comment"> * loading operation of image handler. The methods in this class</span><a name="l00035"></a>00035 <span class="comment"> * are called by the image handler (class CImageHandler) when it loads</span><a name="l00036"></a>00036 <span class="comment"> * an image.</span><a name="l00037"></a>00037 <span class="comment"> *</span><a name="l00038"></a>00038 <span class="comment"> * Reference to implementations of this listener interface can be passed as</span><a name="l00039"></a>00039 <span class="comment"> * a parameter to the constructor of the image handler (class CImageHandler).</span><a name="l00040"></a>00040 <span class="comment"> */</span><a name="l00041"></a><a class="code" href="class_n_o_c_r_utils_1_1_m_image_handler_callback.html">00041</a> <span class="keyword">class </span><a class="code" href="class_n_o_c_r_utils_1_1_m_image_handler_callback.html">MImageHandlerCallback</a><a name="l00042"></a>00042 {<a name="l00043"></a>00043 <span class="keyword">public</span>:<span class="comment"></span><a name="l00044"></a>00044 <span class="comment"> /**</span><a name="l00045"></a>00045 <span class="comment"> * Called by CImageHandler when an image has been loaded.</span><a name="l00046"></a>00046 <span class="comment"> * @param aError Error code given by the CImageHandler or 0 (zero) if the</span><a name="l00047"></a>00047 <span class="comment"> * image was loaded successfully.</span><a name="l00048"></a>00048 <span class="comment"> */</span><a name="l00049"></a>00049 <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_n_o_c_r_utils_1_1_m_image_handler_callback.html#3db218089f2258a62d37b47650b805b6">ImageOperationCompleteL</a>(TInt aError) = 0;<a name="l00050"></a>00050 };<a name="l00051"></a>00051 <a name="l00052"></a>00052 <span class="comment">// ============================================================================</span><a name="l00053"></a>00053 <span class="comment"></span><a name="l00054"></a>00054 <span class="comment">/**</span><a name="l00055"></a>00055 <span class="comment">* CImageHandler</span><a name="l00056"></a>00056 <span class="comment">* Image loader and scaler class.</span><a name="l00057"></a>00057 <span class="comment">*/</span><a name="l00058"></a><a class="code" href="class_n_o_c_r_utils_1_1_c_image_handler.html">00058</a> <span class="keyword">class </span><a class="code" href="class_n_o_c_r_utils_1_1_c_image_handler.html">CImageHandler</a> : <span class="keyword">public</span> CActive<a name="l00059"></a>00059 {<a name="l00060"></a>00060 <span class="keyword">public</span>: <span class="comment">// Constructors and destructor</span><span class="comment"></span><a name="l00061"></a>00061 <span class="comment"> /**</span><a name="l00062"></a>00062 <span class="comment"> * Factory method that constructs a CImageHandler by using the NewLC method</span><a name="l00063"></a>00063 <span class="comment"> * and then cleans the cleanup stack.</span><a name="l00064"></a>00064 <span class="comment"> * @param aBitmap Bitmap where the image data is loaded to.</span><a name="l00065"></a>00065 <span class="comment"> * @param aScaledBitmap Bitmap where the scaled image data is loaded to.</span><a name="l00066"></a>00066 <span class="comment"> * @param aFs File server reference that is used to load the image data.</span><a name="l00067"></a>00067 <span class="comment"> * @param aCallback Listener interface implementation that is notified</span><a name="l00068"></a>00068 <span class="comment"> * when an image has been loaded.</span><a name="l00069"></a>00069 <span class="comment"> * @return pointer to created CImageHandler-object</span><a name="l00070"></a>00070 <span class="comment"> */</span><a name="l00071"></a>00071 <span class="keyword">static</span> <a class="code" href="class_n_o_c_r_utils_1_1_c_image_handler.html">CImageHandler</a>* <a class="code" href="class_n_o_c_r_utils_1_1_c_image_handler.html#2313eabc359b0dee4c27ae32dec4dec4">NewL</a>(CFbsBitmap* aBitmap,<a name="l00072"></a>00072 CFbsBitmap* aScaledBitmap,<a name="l00073"></a>00073 RFs& aFs,<a name="l00074"></a>00074 <a class="code" href="class_n_o_c_r_utils_1_1_m_image_handler_callback.html">MImageHandlerCallback</a>& aCallback);<a name="l00075"></a>00075 <span class="comment"></span><a name="l00076"></a>00076 <span class="comment"> /**</span><a name="l00077"></a>00077 <span class="comment"> * Factory method that constructs a CImageHandler and leaves it to the</span><a name="l00078"></a>00078 <span class="comment"> * cleanup stack.</span><a name="l00079"></a>00079 <span class="comment"> * @param aBitmap Bitmap where the image data is loaded to.</span><a name="l00080"></a>00080 <span class="comment"> * @param aScaledBitmap Bitmap where the scaled image data is loaded to.</span><a name="l00081"></a>00081 <span class="comment"> * @param aFs File server reference that is used to load the image data.</span><a name="l00082"></a>00082 <span class="comment"> * @param aCallback Listener interface implementation that is notified</span><a name="l00083"></a>00083 <span class="comment"> * when an image has been loaded.</span><a name="l00084"></a>00084 <span class="comment"> * @return pointer to created CImageHandler-object</span><a name="l00085"></a>00085 <span class="comment"> */</span><a name="l00086"></a>00086 <span class="keyword">static</span> <a class="code" href="class_n_o_c_r_utils_1_1_c_image_handler.html">CImageHandler</a>* <a class="code" href="class_n_o_c_r_utils_1_1_c_image_handler.html#9e4c968db340c0490421cfefa6aaaade">NewLC</a>(CFbsBitmap* aBitmap,<a name="l00087"></a>00087 CFbsBitmap *aScaledBitmap,<a name="l00088"></a>00088 RFs& aFs,<a name="l00089"></a>00089 <a class="code" href="class_n_o_c_r_utils_1_1_m_image_handler_callback.html">MImageHandlerCallback</a>& aCallback);<span class="comment"></span><a name="l00090"></a>00090 <span class="comment"> /**</span><a name="l00091"></a>00091 <span class="comment"> * Desctructor. Destroys the CImageDecoder used by the image handler.</span><a name="l00092"></a>00092 <span class="comment"> */</span><a name="l00093"></a>00093 <span class="keyword">virtual</span> <a class="code" href="class_n_o_c_r_utils_1_1_c_image_handler.html#1698e035c395d0d88c5ed91117db00bb">~CImageHandler</a>();<a name="l00094"></a>00094 <a name="l00095"></a>00095 <span class="keyword">public</span>: <span class="comment">// New functions</span><span class="comment"></span><a name="l00096"></a>00096 <span class="comment"> /**</span><a name="l00097"></a>00097 <span class="comment"> * Sets the target bitmap where the bitmap data is loaded to.</span><a name="l00098"></a>00098 <span class="comment"> * @param aBitmap Bitmap where the image data is loaded to.</span><a name="l00099"></a>00099 <span class="comment"> * @return True if operation is successfull, false if not.</span><a name="l00100"></a>00100 <span class="comment"> */</span><a name="l00101"></a>00101 TBool <a class="code" href="class_n_o_c_r_utils_1_1_c_image_handler.html#d7610b4879d5654655a53251b19a8cbd">SetBitmapL</a>( CFbsBitmap *aBitmap);<a name="l00102"></a>00102 <span class="comment"></span>⌨️ 快捷键说明
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