symbian/ZXingBarcodeReader/src/ZXingBarcodeReaderAppUi.cpp

   1 /*\r
   2  * Copyright (c) 2009 Nokia Corporation.\r
   3  */\r
   4 \r
   5 // INCLUDE FILES\r
   6 #include <avkon.hrh>\r
   7 #include <eikon.hrh>\r
   8 #include <aknmessagequerydialog.h>\r
   9 #include <aknnotewrappers.h>\r
  10 #include <eikenv.h>\r
  11 \r
  12 #include <ZXingBarcodeReader_0xEF24C10A.rsg>\r
  13 #include "ZXingBarcodeReader.hrh"\r
  14 #include "ZXingBarcodeReader.pan"\r
  15 #include "ZXingBarcodeReaderApplication.h"\r
  16 #include "ZXingBarcodeReaderAppUi.h"\r
  17 #include "ZXingBarcodeReaderAppView.h"\r
  18 \r
  19 \r
  20 // ============================ MEMBER FUNCTIONS ===============================\r
  21 \r
  22 void CZXingBarcodeReaderAppUi::ConstructL ()\r
  23     {\r
  24     // Initialise app UI with standard value.\r
  25     BaseConstructL (CAknAppUi::EAknEnableSkin );\r
  26 \r
  27     // Start receiving camera shutter key events\r
  28     #ifdef ENABLE_CAMERA_SHUTTER\r
  29     CaptureCameraShutter(ETrue);\r
  30     #endif\r
  31     \r
  32     // Make this class observe changes in foreground events\r
  33     iEikonEnv->AddForegroundObserverL(*this);\r
  34     \r
  35     // Create view\r
  36     iAppView = CZXingBarcodeReaderAppView::NewL (ClientRect () );\r
  37     }\r
  38 \r
  39 CZXingBarcodeReaderAppUi::CZXingBarcodeReaderAppUi ()\r
  40     {\r
  41     }\r
  42 \r
  43 CZXingBarcodeReaderAppUi::~CZXingBarcodeReaderAppUi ()\r
  44     {\r
  45     delete iAppView;\r
  46     \r
  47     #ifdef ENABLE_CAMERA_SHUTTER\r
  48     CaptureCameraShutter(EFalse);\r
  49     #endif\r
  50 \r
  51     iShutterKeyHandles.Close();\r
  52     }\r
  53 \r
  54 #ifdef ENABLE_CAMERA_SHUTTER\r
  55 \r
  56 void CZXingBarcodeReaderAppUi::CaptureCameraShutter(TBool aEnable)\r
  57     {\r
  58     // Try to capture events from the camera shutter key(s)\r
  59     // http://wiki.forum.nokia.com/index.php/KIS000563_-_Camera_shutter_key_(EKeyCamera_events)_cannot_be_used_in_3rd_party_applications\r
  60     if (aEnable && !iCameraKeyCaptured)\r
  61         {\r
  62         iCameraKeyCaptured = ETrue;\r
  63         // Enable capturing\r
  64         RProcess proc;\r
  65         iShutterKeyHandles.Reset();\r
  66         if(proc.HasCapability(ECapabilitySwEvent))\r
  67             {\r
  68             for(TInt i=0; KCameraShutterKeyEventCodes[i] != 0; i++)\r
  69                 {\r
  70                 TInt32 handle = iEikonEnv->RootWin().CaptureKey( KCameraShutterKeyEventCodes[i], 0, 0 );\r
  71                 if(handle >= 0)\r
  72                     {\r
  73                     iShutterKeyHandles.Append(handle);\r
  74                     }\r
  75                 }\r
  76             }\r
  77         }\r
  78     else if(!aEnable && iCameraKeyCaptured)\r
  79         {\r
  80         iCameraKeyCaptured = EFalse;\r
  81         // Disable capturing\r
  82         // Release the captured camera shutter key(s)\r
  83         for(TInt i=0; i < iShutterKeyHandles.Count(); i++)\r
  84             {\r
  85             iEikonEnv->RootWin().CancelCaptureKey( iShutterKeyHandles[i] );\r
  86             }\r
  87         }\r
  88     }\r
  89 #endif\r
  90 \r
  91 \r
  92 void CZXingBarcodeReaderAppUi::HandleGainingForeground()\r
  93     {\r
  94     // Application gets focused so reserve the camera\r
  95     // http://wiki.forum.nokia.com/index.php/CS000821_-_Handling_Camera_resource\r
  96     if ( iAppView && \r
  97          iAppView->CameraEngine() &&\r
  98          iAppView->CameraEngine()->State() != CCameraEngine::EEngineNotReady )\r
  99         {\r
 100         iAppView->CameraEngine()->ReserveAndPowerOn();\r
 101         \r
 102 #ifdef ENABLE_CAMERA_SHUTTER\r
 103         CaptureCameraShutter(ETrue);\r
 104 #endif\r
 105         }\r
 106     }\r
 107 \r
 108 void CZXingBarcodeReaderAppUi::HandleLosingForeground()\r
 109     {\r
 110     // Application loses focus so release the camera\r
 111     // http://wiki.forum.nokia.com/index.php/CS000821_-_Handling_Camera_resource\r
 112     if ( iAppView && \r
 113          iAppView->CameraEngine() &&\r
 114          iAppView->CameraEngine()->State() != CCameraEngine::EEngineNotReady )\r
 115         {\r
 116         iAppView->CameraEngine()->ReleaseAndPowerOff();\r
 117         \r
 118 #ifdef ENABLE_CAMERA_SHUTTER\r
 119         CaptureCameraShutter(EFalse);\r
 120 #endif\r
 121         }\r
 122     }\r
 123 \r
 124 void CZXingBarcodeReaderAppUi::UseOptionsExitCbaL()\r
 125     {\r
 126     CEikButtonGroupContainer* cba = Cba();\r
 127     if (cba)\r
 128         {\r
 129         cba->SetCommandSetL(R_AVKON_SOFTKEYS_OPTIONS_EXIT);\r
 130         cba->DrawNow();\r
 131         }\r
 132     }\r
 133 \r
 134 void CZXingBarcodeReaderAppUi::UseOptionsBackCbaL()\r
 135     {\r
 136     CEikButtonGroupContainer* cba = Cba();\r
 137     if (cba)\r
 138         {\r
 139         cba->SetCommandSetL(R_AVKON_SOFTKEYS_OPTIONS_BACK);\r
 140         cba->DrawNow();\r
 141         }\r
 142     }\r
 143 \r
 144 TBool CZXingBarcodeReaderAppUi::IsBackCBA()\r
 145     {\r
 146     CEikButtonGroupContainer* cba = Cba();\r
 147     // NOTE: There should be EAknSoftkeyBack in the application because\r
 148     // we use R_AVKON_SOFTKEYS_SELECT_BACK, but it seems that there is EAknSoftkeyCancel\r
 149     CCoeControl* back = cba->ControlOrNull(EAknSoftkeyBack);\r
 150     CCoeControl* cancel = cba->ControlOrNull(EAknSoftkeyCancel);\r
 151     if (back || cancel)\r
 152         return ETrue;\r
 153     else\r
 154         return EFalse;\r
 155     }\r
 156 \r
 157 TKeyResponse CZXingBarcodeReaderAppUi::HandleKeyEventL(\r
 158     const TKeyEvent& aKeyEvent,TEventCode aType)\r
 159     {\r
 160     // Capture picture with selection key\r
 161     switch ( aKeyEvent.iCode )\r
 162         {\r
 163         case EKeyOK:\r
 164         case EStdKeyDevice3:\r
 165         case EKeyUpArrow:\r
 166         case EKeyDownArrow:  \r
 167             {\r
 168             // Capture picture\r
 169             return iAppView->OfferKeyEventL(aKeyEvent,aType);\r
 170             }\r
 171         default:\r
 172             {\r
 173             break;\r
 174             }\r
 175         };\r
 176 \r
 177     // Camera shutter events handling\r
 178     #ifdef ENABLE_CAMERA_SHUTTER\r
 179     // Camera shutter autofocus\r
 180     switch ( aKeyEvent.iScanCode )\r
 181         {\r
 182         case KStdKeyCameraFocus:\r
 183         case KStdKeyCameraFocus2:\r
 184             {\r
 185             // Camera shutter autofocus\r
 186             return iAppView->OfferKeyEventL(aKeyEvent,aType);\r
 187             }\r
 188         default:\r
 189             {\r
 190             break;\r
 191             }\r
 192         };\r
 193     // Camera shutter key\r
 194     for(TInt i=0; KCameraShutterKeyEventCodes[i] != 0; i++)\r
 195           {\r
 196           if( KCameraShutterKeyEventCodes[i] == aKeyEvent.iCode )\r
 197             {\r
 198             // Capture image\r
 199             iAppView->Capture();\r
 200             return EKeyWasConsumed;\r
 201             }\r
 202           }\r
 203     #endif\r
 204 \r
 205     return EKeyWasNotConsumed;\r
 206     }\r
 207 \r
 208 void CZXingBarcodeReaderAppUi::HandleCommandL (TInt aCommand )\r
 209     {\r
 210     switch (aCommand )\r
 211         {\r
 212         case EEikCmdExit:\r
 213         case EAknSoftkeyExit:\r
 214             {\r
 215             Exit();\r
 216             break;\r
 217             }\r
 218         case EAknSoftkeyBack:\r
 219             {\r
 220             iAppView->CancelCapturedPicture();\r
 221             UseOptionsExitCbaL();\r
 222             break;\r
 223             }\r
 224         case EAbout:\r
 225             {\r
 226             CAknMessageQueryDialog* dlg = new (ELeave) CAknMessageQueryDialog ();\r
 227             dlg->PrepareLC (R_ABOUT_QUERY_DIALOG );\r
 228             HBufC* title = iEikonEnv->AllocReadResourceLC (R_ABOUT_DIALOG_TITLE );\r
 229             dlg->QueryHeading ()->SetTextL (*title );\r
 230             CleanupStack::PopAndDestroy (); //title\r
 231             HBufC* msg = iEikonEnv->AllocReadResourceLC (R_ABOUT_DIALOG_TEXT );\r
 232             dlg->SetMessageTextL (*msg );\r
 233             CleanupStack::PopAndDestroy (); //msg\r
 234             dlg->RunLD();\r
 235             break;\r
 236             }\r
 237         default:\r
 238             {\r
 239             break;\r
 240             }\r
 241         };\r
 242     }\r
 243 \r
 244 void CZXingBarcodeReaderAppUi::HandleResourceChangeL(TInt aType)\r
 245     {\r
 246     CAknAppUi::HandleResourceChangeL( aType );\r
 247        \r
 248     if ( aType==KEikDynamicLayoutVariantSwitch )\r
 249         {\r
 250         if (iAppView)\r
 251             {\r
 252             TRect rect;\r
 253             AknLayoutUtils::LayoutMetricsRect(AknLayoutUtils::EMainPane,rect);\r
 254             iAppView->SetRect(rect);\r
 255             }\r
 256         }   \r
 257     \r
 258     }\r
 259 \r
 260 // End of File\r