symbian/ZXingBarcodeReader/src/DecodingOperations.cpp

   1 #include "ZXingBarcodeReaderAppView.h"\r
   2 #include <e32std.h>\r
   3 \r
   4 #include <zxing/qrcode/QRCodeReader.h>\r
   5 \r
   6 #include <zxing/common/GlobalHistogramBinarizer.h>\r
   7 #include <zxing/Binarizer.h>\r
   8 #include <zxing/BinaryBitmap.h>\r
   9 #include <CameraImage.h>\r
  10 #include <string>\r
  11 \r
  12 using namespace zxing;\r
  13 using namespace zxing::qrcode;\r
  14 \r
  15 void CZXingBarcodeReaderAppView::StartTimer()\r
  16         {\r
  17         const TInt tickInterval=2000000;\r
  18         iPeriodic=CPeriodic::NewL(0); // neutral priority\r
  19 \r
  20         //CleanupStack::PushL(iPeriodic);\r
  21 \r
  22         iPeriodic->Start(tickInterval,tickInterval,TCallBack(&CZXingBarcodeReaderAppView::Tick, this));\r
  23 \r
  24 //      CleanupStack::PopAndDestroy(iPeriodic);\r
  25         }\r
  26 \r
  27 TInt CZXingBarcodeReaderAppView::Tick(TAny* aObject)\r
  28         {\r
  29         // cast, and call non-static function\r
  30         ((CZXingBarcodeReaderAppView*)aObject)->decodeBackbufferImage();\r
  31         return 1;\r
  32         }\r
  33 \r
  34 void CZXingBarcodeReaderAppView::decodeBackbufferImage()\r
  35         {\r
  36         QRCodeReader decoder;\r
  37 \r
  38         CameraImage image;\r
  39         image.setImage(iBackBuffer);\r
  40 \r
  41 \r
  42         Ref<Result> res;\r
  43 \r
  44         try\r
  45                 {\r
  46                 Ref<LuminanceSource> imageRef(new CameraImage(image));\r
  47                 GlobalHistogramBinarizer* binz = new GlobalHistogramBinarizer(imageRef);\r
  48         \r
  49                 Ref<Binarizer> bz (binz);\r
  50                 BinaryBitmap* bb = new BinaryBitmap(bz);\r
  51         \r
  52                 Ref<BinaryBitmap> ref(bb);\r
  53         \r
  54                 res = decoder.decode(ref);\r
  55         \r
  56                 string string = res->getText()->getText();\r
  57                 HBufC8 *pHeap8 = HBufC8::NewMaxLC(string.size());\r
  58                 pHeap8->Des().Copy((const TUint8 *)string.c_str());\r
  59                 \r
  60                 HBufC *pHeap16 = HBufC::NewMaxLC(pHeap8->Length());\r
  61                 pHeap16->Des().Copy(*pHeap8);\r
  62                 \r
  63                 ShowResultL(*pHeap16);\r
  64                 }\r
  65         catch(zxing::Exception& e)\r
  66                 {\r
  67                         string string = "Error...retrying...";\r
  68                         HBufC8 *pHeap8 = HBufC8::NewMaxLC(string.size());\r
  69                         pHeap8->Des().Copy((const TUint8 *)string.c_str());\r
  70                         \r
  71                         HBufC *pHeap16 = HBufC::NewMaxLC(pHeap8->Length());\r
  72                         pHeap16->Des().Copy(*pHeap8);\r
  73                         \r
  74                         ShowResultL(*pHeap16);\r
  75                 }\r
  76         }\r
  77 \r
  78 void CZXingBarcodeReaderAppView::ShowResultL(TDesC16& message)\r
  79         {\r
  80         if (!iNote)\r
  81                 {\r
  82         // Create the note once\r
  83         iNote = CAknInfoPopupNoteController::NewL();\r
  84                 }\r
  85         // Hide the note. The last note may be visible when creating the second\r
  86         iNote->HideInfoPopupNote();\r
  87 \r
  88         // Set the time delay period before the popup is shown (in milliseconds)\r
  89         iNote->SetTimeDelayBeforeShow(100);\r
  90 \r
  91         // Set the time period of how long the popup is in the view (in milliseconds)\r
  92         iNote->SetTimePopupInView(2*1000);\r
  93 \r
  94         // Note text\r
  95         iNote->SetTextL(message);\r
  96         \r
  97         TRect rect(Rect());\r
  98         \r
  99         // Note position\r
 100         iNote->SetPositionAndAlignment(TPoint(rect.Width()/5,rect.Height()/7),EHLeftVTop);\r
 101 \r
 102         // Show note\r
 103         iNote->ShowInfoPopupNote();\r
 104         }\r