symbian/ZXingBarcodeReader/src/ZXingBarcodeReaderAppView.cpp

   1 /*\r
   2  * Copyright (c) 2009 Nokia Corporation.\r
   3  */\r
   4 \r
   5 // INCLUDE FILES\r
   6 #include <coemain.h>\r
   7 #include <eikon.hrh>\r
   8 #include <aknutils.h>\r
   9 #include <pathinfo.h>\r
  10 #include <f32file.h>\r
  11 #include <BAUTILS.H>\r
  12 #include "ZXingBarcodeReaderAppView.h"\r
  13 #include "ZXingBarcodeReaderAppUi.h"\r
  14 \r
  15 \r
  16 \r
  17 // ============================ MEMBER FUNCTIONS ===============================\r
  18 \r
  19 CZXingBarcodeReaderAppView* CZXingBarcodeReaderAppView::NewL (const TRect& aRect )\r
  20         {\r
  21         CZXingBarcodeReaderAppView* self = CZXingBarcodeReaderAppView::NewLC (aRect );\r
  22         CleanupStack::Pop (self );\r
  23         return self;\r
  24         }\r
  25 \r
  26 CZXingBarcodeReaderAppView* CZXingBarcodeReaderAppView::NewLC (const TRect& aRect )\r
  27         {\r
  28         CZXingBarcodeReaderAppView* self = new (ELeave) CZXingBarcodeReaderAppView;\r
  29         CleanupStack::PushL (self );\r
  30         self->ConstructL (aRect );\r
  31         return self;\r
  32         }\r
  33 \r
  34 void CZXingBarcodeReaderAppView::ConstructL (const TRect& aRect )\r
  35         {\r
  36         // Create a window for this application view\r
  37         CreateWindowL ();\r
  38 \r
  39         iTitleFont = AknLayoutUtils::FontFromId(EAknLogicalFontPrimarySmallFont);\r
  40 \r
  41         iAppUi = static_cast<CZXingBarcodeReaderAppUi*>(iEikonEnv->EikAppUi());\r
  42 \r
  43         // Set the windows size\r
  44         SetRect (aRect );\r
  45 \r
  46         //Start decoder timer.\r
  47         StartTimer();\r
  48         \r
  49         // Activate the window, which makes it ready to be drawn\r
  50         ActivateL ();\r
  51         }\r
  52 \r
  53 CZXingBarcodeReaderAppView::CZXingBarcodeReaderAppView () : iPeriodic(NULL)\r
  54         {\r
  55         }\r
  56 \r
  57 CZXingBarcodeReaderAppView::~CZXingBarcodeReaderAppView ()\r
  58         {\r
  59         if (iCameraWrapper)\r
  60                 {\r
  61         iCameraWrapper->ReleaseAndPowerOff();\r
  62                 }\r
  63         delete iCameraWrapper;\r
  64         delete iData;\r
  65 \r
  66         ReleaseBackBuffer();\r
  67         }\r
  68 \r
  69 TKeyResponse CZXingBarcodeReaderAppView::OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType)\r
  70         {\r
  71         switch ( aKeyEvent.iCode )\r
  72                 {\r
  73                 case EKeyOK:\r
  74                 case EStdKeyDevice3:\r
  75                         {\r
  76                         // Capture picture\r
  77                         iCameraShutterFocusing = EFalse;\r
  78                         StartFocusing();\r
  79                         return EKeyWasConsumed;\r
  80                         }\r
  81                 case EKeyUpArrow:\r
  82                         {\r
  83                         if (iCameraWrapper->State() == CCameraEngine::EEngineViewFinding)\r
  84                                 {\r
  85                         iCameraWrapper->AdjustDigitalZoom(ETrue);\r
  86                                 }\r
  87                         return EKeyWasConsumed;\r
  88                         }\r
  89                 case EKeyDownArrow:\r
  90                         {\r
  91                         if (iCameraWrapper->State() == CCameraEngine::EEngineViewFinding)\r
  92                                 {\r
  93                         iCameraWrapper->AdjustDigitalZoom(EFalse);\r
  94 \r
  95                                 }\r
  96                         return EKeyWasConsumed;\r
  97                         }\r
  98                 default:\r
  99                         {\r
 100                         break;\r
 101                         }\r
 102                 };\r
 103 \r
 104 \r
 105 \r
 106 #ifdef ENABLE_CAMERA_SHUTTER\r
 107         // Camera shutter autofocus\r
 108         switch ( aKeyEvent.iScanCode )\r
 109                 {\r
 110                 case KStdKeyCameraFocus:\r
 111                 case KStdKeyCameraFocus2:\r
 112                         {\r
 113                         // Camera shutter autofocus\r
 114                         if (aType == EEventKeyDown)\r
 115                                 {\r
 116                         if (!iAppUi->IsBackCBA())\r
 117                                 {\r
 118                         iCameraShutterFocusing = ETrue;\r
 119                         StartFocusing();\r
 120                                 }\r
 121                         return EKeyWasConsumed;\r
 122                                 }\r
 123                         else if (aType == EEventKeyUp)\r
 124                                 {\r
 125                         // Camera state can be EEngineIdle or EEngineFocusing\r
 126                         if (!iAppUi->IsBackCBA() && (iCameraWrapper->State() == CCameraEngine::EEngineFocusing ||\r
 127                                         iCameraWrapper->State() == CCameraEngine::EEngineIdle))\r
 128                                 {\r
 129                         iCameraWrapper->FocusCancel();\r
 130                         CancelCapturedPicture();\r
 131                         iAppUi->UseOptionsExitCbaL();\r
 132                                 }\r
 133                         return EKeyWasConsumed;\r
 134                                 }\r
 135                         }\r
 136                 default:\r
 137                         {\r
 138                         break;\r
 139                         }\r
 140                 };\r
 141 #endif\r
 142 \r
 143         return EKeyWasNotConsumed;\r
 144         }\r
 145 \r
 146 void CZXingBarcodeReaderAppView::CancelCapturedPicture(TBool aCleanTexts)\r
 147         {\r
 148         if (iCameraWrapper && iCameraWrapper->State() == CCameraEngine::EEngineIdle)\r
 149                 {\r
 150         TRAPD(err,iCameraWrapper->StartViewFinderL(iViewFinderSize));\r
 151         if (aCleanTexts)\r
 152                 {\r
 153         if (err)\r
 154                 {\r
 155         SetError(_L("Camera viewfinder error %d"), err);                    \r
 156                 }\r
 157         else\r
 158                 {\r
 159         SetTitle(_L("Camera viewfinder"));\r
 160                 }            \r
 161                 }\r
 162                 }\r
 163         }\r
 164 \r
 165 void CZXingBarcodeReaderAppView::Draw(const TRect& /*aRect*/) const\r
 166                 {\r
 167         CWindowGc& gc = SystemGc ();\r
 168 \r
 169         // Draw backbuffer that has camera picture\r
 170         gc.BitBlt(TPoint(0, 0), iBackBuffer);\r
 171 \r
 172         // Draw texts\r
 173         DrawTexts(gc);\r
 174 \r
 175         // Focus rect\r
 176         if (iCameraWrapper && iCameraWrapper->State() == CCameraEngine::EEngineFocusing)\r
 177                 {\r
 178         gc.SetPenColor(KRgbWhite);\r
 179         gc.DrawRect(iFocusRect);\r
 180                 }\r
 181                 }\r
 182 \r
 183 void CZXingBarcodeReaderAppView::DrawTexts(CWindowGc& gc) const\r
 184                 {\r
 185         if (iTitle.Length()>0)\r
 186                 {\r
 187         TRect rect(Rect());\r
 188         gc.SetPenColor(KRgbWhite);\r
 189         gc.UseFont(iTitleFont);\r
 190         gc.DrawText(iTitle, rect, rect.Height()/10, CGraphicsContext::ECenter );\r
 191         gc.DiscardFont();\r
 192                 }\r
 193                 }\r
 194 \r
 195 void CZXingBarcodeReaderAppView::SizeChanged()\r
 196         {\r
 197         // Create camera wrapper class here because\r
 198         // whole camera wrapper and all handles have to reset\r
 199         // while orientatio of the application changes.\r
 200         if (iCameraWrapper)\r
 201                 {\r
 202         // Power off camera if it is on\r
 203         iCameraWrapper->StopViewFinder();\r
 204         iCameraWrapper->ReleaseAndPowerOff();\r
 205         delete iCameraWrapper; iCameraWrapper = NULL;\r
 206                 }\r
 207         TInt camErr(KErrNotSupported);\r
 208         if(CCameraEngine::CamerasAvailable() > 0)\r
 209                 {\r
 210         TRAP(camErr, iCameraWrapper = CCameraEngine::NewL(0,0,this));\r
 211                 }\r
 212 \r
 213         // iViewFinderSize is picture size for viewfinder.\r
 214         // iCaptureSize is picture size for capturing picture.\r
 215         // We want fill whole screen\r
 216         if (Rect().Size().iWidth > Rect().Size().iHeight)\r
 217                 {\r
 218         iViewFinderSize = TSize(Rect().Size().iWidth,Rect().Size().iWidth);\r
 219         iCaptureSize = TSize(1280,960); // Captured picture size\r
 220                 }\r
 221         else\r
 222                 {\r
 223         iViewFinderSize = TSize(Rect().Size().iHeight,Rect().Size().iHeight);\r
 224         iCaptureSize = TSize(1280,960); // Captured picture size\r
 225                 }\r
 226 \r
 227         // Focus rectangle\r
 228         iFocusRect = Rect();\r
 229         iFocusRect.Shrink(Rect().Size().iWidth/4, Rect().Size().iHeight/4);\r
 230 \r
 231         // Create back buffer where recieved camera pictures are copied\r
 232         ReleaseBackBuffer();\r
 233         CreateBackBufferL();\r
 234 \r
 235         // Power on camera, start viewfinder when MceoCameraReady() received\r
 236         if(camErr == KErrNone)\r
 237                 {\r
 238         iCameraWrapper->ReserveAndPowerOn();    \r
 239         SetTitle(_L("Camera power on"));\r
 240                 }\r
 241         else\r
 242                 {\r
 243         SetTitle(_L("no camera found"));\r
 244                 }\r
 245         }\r
 246 \r
 247 void CZXingBarcodeReaderAppView::HandlePointerEventL (\r
 248                 const TPointerEvent& aPointerEvent )\r
 249         {\r
 250         if (aPointerEvent.iType == TPointerEvent::EButton1Down)\r
 251                 {\r
 252         // When pointing to screen camera capture picture\r
 253         if (!iAppUi->IsBackCBA() && \r
 254                         iCameraWrapper && iCameraWrapper->State() == CCameraEngine::EEngineViewFinding)\r
 255                 {\r
 256         iCameraShutterFocusing = EFalse;\r
 257         StartFocusing();\r
 258                 }\r
 259         // After captureing, when pointing again to screen camera\r
 260         // start viewfinder again\r
 261         else if (!iAppUi->IsBackCBA() &&\r
 262                         iCameraWrapper && iCameraWrapper->State() == CCameraEngine::EEngineIdle)\r
 263                 {\r
 264         CancelCapturedPicture();\r
 265         iAppUi->UseOptionsExitCbaL();\r
 266                 }\r
 267                 }\r
 268         }\r
 269 \r
 270 void CZXingBarcodeReaderAppView::SetTitle(const TDesC& aTitle)\r
 271         {\r
 272         iTitle.Copy(aTitle);\r
 273         DrawNow();\r
 274         }\r
 275 \r
 276 void CZXingBarcodeReaderAppView::SetError( const TDesC& aMsg, TInt aVal )\r
 277         {\r
 278         iTitle.Format(aMsg, aVal);\r
 279         DrawNow();\r
 280         }\r
 281 \r
 282 void CZXingBarcodeReaderAppView::SetError( const TDesC& aMsg, TInt aVal1, TInt aVal2 )\r
 283         {\r
 284         iTitle.Format(aMsg, aVal1, aVal2);\r
 285         DrawNow();\r
 286         }\r
 287 \r
 288 void CZXingBarcodeReaderAppView::CreateBackBufferL()\r
 289         {\r
 290         // create back buffer bitmap\r
 291         iBackBuffer = new (ELeave) CFbsBitmap;\r
 292 \r
 293         User::LeaveIfError( iBackBuffer->Create(Size(),EColor16M));\r
 294 \r
 295         // create back buffer graphics context\r
 296         iBackBufferDevice = CFbsBitmapDevice::NewL(iBackBuffer);\r
 297         User::LeaveIfError(iBackBufferDevice->CreateContext(iBackBufferContext));\r
 298         iBackBufferContext->SetPenStyle(CGraphicsContext::ESolidPen);\r
 299 \r
 300         iBackBufferContext->SetBrushColor(KRgbBlack);\r
 301         iBackBufferContext->Clear();\r
 302         }\r
 303 \r
 304 void CZXingBarcodeReaderAppView::ReleaseBackBuffer()\r
 305         {\r
 306         if (iBackBufferContext)\r
 307                 {\r
 308         delete iBackBufferContext;\r
 309         iBackBufferContext = NULL;\r
 310                 }\r
 311         if (iBackBufferDevice)\r
 312                 {\r
 313         delete iBackBufferDevice;\r
 314         iBackBufferDevice = NULL;\r
 315                 }\r
 316         if (iBackBuffer)\r
 317                 {\r
 318         delete iBackBuffer;\r
 319         iBackBuffer = NULL;\r
 320                 }\r
 321         }\r
 322 \r
 323 void CZXingBarcodeReaderAppView::MceoCameraReady()\r
 324         {\r
 325         iAppUi->UseOptionsExitCbaL();\r
 326 \r
 327         if (iCameraWrapper->State() == CCameraEngine::EEngineIdle)\r
 328                 {\r
 329         // Prepare camera\r
 330         TRAPD(err,iCameraWrapper->PrepareL(iCaptureSize));\r
 331         if (err)\r
 332                 {\r
 333         SetError(_L("Camera prepare error %d"), err);\r
 334         return;\r
 335                 }\r
 336 \r
 337         // Start viewfinder. Viewfinder pictures starts coming into MceoViewFinderFrameReady();\r
 338         TRAPD(err2,iCameraWrapper->StartViewFinderL(iViewFinderSize));\r
 339         if (err2)\r
 340                 {\r
 341         SetError(_L("Camera start viewfinder error %d"), err2);\r
 342         return;\r
 343                 }\r
 344 \r
 345         SetTitle(_L("Camera viewfinder"));\r
 346                 }\r
 347         }\r
 348 \r
 349 void CZXingBarcodeReaderAppView::Capture()\r
 350         {\r
 351         // This method is called when picture is focused with camera shutter and pressed whole down\r
 352         // as taking a new picture\r
 353 #ifdef ENABLE_CAMERA_SHUTTER\r
 354         if (iCameraWrapper && !iAppUi->IsBackCBA())\r
 355                 {\r
 356         // No focus supported\r
 357         SetTitle(_L("Capturing picture"));\r
 358         iCameraWrapper->StopViewFinder();\r
 359         TRAPD(err,iCameraWrapper->CaptureL());\r
 360         if (err)\r
 361                 {\r
 362         SetError(_L("Camera capture error %d"), err);                    \r
 363                 }\r
 364                 }\r
 365 #endif\r
 366         }\r
 367 \r
 368 void CZXingBarcodeReaderAppView::StartFocusing()\r
 369         {\r
 370         if (iCameraWrapper && iCameraWrapper->State() == CCameraEngine::EEngineViewFinding)\r
 371                 {\r
 372         if (!iCameraWrapper->IsAutoFocusSupported())\r
 373                 {\r
 374         // No focus supported\r
 375         SetTitle(_L("Capturing picture"));\r
 376         iCameraWrapper->StopViewFinder();\r
 377         TRAPD(err,iCameraWrapper->CaptureL());\r
 378         if (err)\r
 379                 {\r
 380         SetError(_L("Camera capture error %d"), err);                    \r
 381                 }\r
 382                 }\r
 383         else\r
 384                 {\r
 385         // Focusing supported\r
 386         iCameraWrapper->StartFocusL();\r
 387         SetTitle(_L("Autofocusing..."));                    \r
 388                 }\r
 389                 }\r
 390         }\r
 391 \r
 392 void CZXingBarcodeReaderAppView::MceoFocusComplete()\r
 393         {\r
 394         // CameraEngine state is EEngineIdle\r
 395         SetTitle(_L("Focused"));                    \r
 396 \r
 397         if (iCameraShutterFocusing)\r
 398                 {\r
 399         // Leave as focused. User must press whole camera shutter down for capturing\r
 400         // then CZXingBarcodeReaderAppView::Capture() is called\r
 401                 }\r
 402         else\r
 403                 {\r
 404         // Capture picture after it has focused\r
 405         iCameraWrapper->StopViewFinder();\r
 406         TRAPD(err,iCameraWrapper->CaptureL());\r
 407         if (err)\r
 408                 {\r
 409         SetError(_L("Camera capture error %d"), err);                    \r
 410                 }\r
 411                 }\r
 412         }\r
 413 \r
 414 void CZXingBarcodeReaderAppView::MceoCapturedDataReady( TDesC8* aData )\r
 415         {\r
 416         SetTitle(_L("Saving picture..."));\r
 417 \r
 418         delete iData; iData = NULL;\r
 419         iData = aData->Alloc();\r
 420 \r
 421         if (iCameraWrapper)\r
 422                 iCameraWrapper->ReleaseImageBuffer();\r
 423 \r
 424         TRAP_IGNORE(iAppUi->UseOptionsBackCbaL());\r
 425 \r
 426         StorePicture(iData);\r
 427         }\r
 428 \r
 429 void CZXingBarcodeReaderAppView::StorePicture( TDesC8* aData )\r
 430         {\r
 431         // Create path for filename\r
 432         TFileName path = PathInfo::PhoneMemoryRootPath(); \r
 433         path.Append(PathInfo::ImagesPath());\r
 434 \r
 435         // Ensure that path exists\r
 436         BaflUtils::EnsurePathExistsL(iEikonEnv->FsSession(),path);\r
 437 \r
 438         // Get next free filename for the image\r
 439         TFileName fileToSave;\r
 440         TBool fileExists = ETrue;\r
 441         for (TInt i=1 ; i<100 ; i++)\r
 442                 {\r
 443         fileToSave.Copy(path);\r
 444         fileToSave.Append(_L("cw_image_"));\r
 445         fileToSave.AppendNum(i);\r
 446         fileToSave.Append(_L(".jpg"));\r
 447         fileExists = BaflUtils::FileExists(iEikonEnv->FsSession(),fileToSave);\r
 448         if (!fileExists)\r
 449                 {\r
 450         break;\r
 451                 }\r
 452                 }\r
 453 \r
 454         // Save file\r
 455         if (!fileExists)\r
 456                 {\r
 457         RFile file;\r
 458         TInt err = file.Create(iEikonEnv->FsSession(),fileToSave,EFileWrite);\r
 459         if (!err)\r
 460                 {\r
 461         file.Write(*aData);\r
 462         file.Close();\r
 463         SetTitle(fileToSave);\r
 464                 }\r
 465         else\r
 466                 {\r
 467         SetError(_L("File saving error %d"),err);\r
 468                 }\r
 469                 }\r
 470         else\r
 471                 {\r
 472         SetTitle(_L("File not saved, delete old pictures!"));\r
 473                 }\r
 474         }\r
 475 \r
 476 \r
 477 void CZXingBarcodeReaderAppView::MceoCapturedBitmapReady( CFbsBitmap* aBitmap )\r
 478         {\r
 479         if (iBackBufferContext)\r
 480                 {\r
 481         TSize bmpSizeInPixels = aBitmap->SizeInPixels();\r
 482         TInt xDelta = (Rect().Width() - bmpSizeInPixels.iWidth) / 2;\r
 483         TInt yDelta = (Rect().Height() - bmpSizeInPixels.iHeight) / 2;\r
 484         TPoint pos( xDelta, yDelta );\r
 485 \r
 486         // Copy received viewfinder picture to back buffer\r
 487         iBackBufferContext->BitBlt( pos, aBitmap, TRect( TPoint( 0, 0 ), bmpSizeInPixels ));\r
 488 \r
 489         // Update backbuffer into screen \r
 490         SetTitle(_L("New picture"));\r
 491                 }\r
 492         if (iCameraWrapper)\r
 493                 iCameraWrapper->ReleaseImageBuffer();\r
 494         }\r
 495 \r
 496 void CZXingBarcodeReaderAppView::MceoViewFinderFrameReady( CFbsBitmap& aFrame )\r
 497         {\r
 498         if (iBackBufferContext)\r
 499                 {\r
 500         TSize bmpSizeInPixels = aFrame.SizeInPixels();\r
 501         TInt xDelta = (Rect().Width() - bmpSizeInPixels.iWidth) / 2;\r
 502         TInt yDelta = (Rect().Height() - bmpSizeInPixels.iHeight) / 2;\r
 503         TPoint pos( xDelta, yDelta );\r
 504 \r
 505         // Copy received viewfinder picture to back buffer\r
 506         iBackBufferContext->BitBlt( pos, &aFrame, TRect( TPoint( 0, 0 ), bmpSizeInPixels ));\r
 507 \r
 508         // Update backbuffer into screen \r
 509         DrawNow();\r
 510                 }\r
 511         if (iCameraWrapper)\r
 512                 iCameraWrapper->ReleaseViewFinderBuffer();\r
 513         }\r
 514 \r
 515 void CZXingBarcodeReaderAppView::MceoHandleError( TCameraEngineError aErrorType, TInt aError )\r
 516         {\r
 517         // NOTE: CameraEngine state seems to go into CCameraEngine::EEngineIdle state\r
 518 \r
 519         if (aErrorType == EErrReserve)\r
 520                 {\r
 521         return; //-18 comes on application startup, but everything works ok\r
 522                 }\r
 523 \r
 524         switch (aErrorType)\r
 525                 {\r
 526                 case EErrReserve:\r
 527                         {\r
 528                         SetError(_L("Camera reserved error  (%d)"), aError);\r
 529                         break;\r
 530                         }\r
 531                 case EErrPowerOn:\r
 532                         {\r
 533                         SetError(_L("Camera power on error  (%d)"), aError);\r
 534                         break;\r
 535                         }\r
 536                 case EErrViewFinderReady:\r
 537                         {\r
 538                         SetError(_L("Camera viewfinder error  (%d)"), aError);\r
 539                         break;\r
 540                         }\r
 541                 case EErrImageReady:\r
 542                         {\r
 543                         SetError(_L("Camera image ready error  (%d)"), aError);\r
 544                         break;\r
 545                         }\r
 546                 case EErrAutoFocusInit:\r
 547                 case EErrAutoFocusMode:\r
 548                 case EErrAutoFocusArea:\r
 549                 case EErrAutoFocusRange:\r
 550                 case EErrAutoFocusType:\r
 551                 case EErrOptimisedFocusComplete:\r
 552                         {\r
 553                         //SetTitle(_L("Try focusing again"));\r
 554                         break;\r
 555                         }\r
 556                 default:\r
 557                         {\r
 558                         SetError(_L("Error %d (%d)"), aErrorType, aError);\r
 559                         break;\r
 560                         }\r
 561                 };\r
 562 \r
 563         // Try handle error\r
 564         CancelCapturedPicture(EFalse);\r
 565         iAppUi->UseOptionsExitCbaL();\r
 566         }\r
 567 \r
 568 void CZXingBarcodeReaderAppView::MceoHandleOtherEvent( const TECAMEvent& /*aEvent*/ )\r
 569         {\r
 570         }\r
 571 \r
 572 \r
 573 \r
 574 \r
 575 // End of File\r