TB9.2 Example Applications: examples/Graphics/WS/transparent/eventhandler.cpp Source File

00001 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
+00002 // All rights reserved.
+00003 // This component and the accompanying materials are made available
+00004 // under the terms of "Eclipse Public License v1.0"
+00005 // which accompanies this distribution, and is available
+00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
+00007 //
+00008 // Initial Contributors:
+00009 // Nokia Corporation - initial contribution.
+00010 //
+00011 // Contributors:
+00012 //
+00013 // Description:
+00014 // This encapsulates both issuing a request for getting pointer events to an asynchronous service provider
+00015 // and handling the completed requests.
+00016 //
+00017 
+00018 
+00019 
+00024 #include "transparent.h"
+00025 
+00030 CEventHandler* CEventHandler::NewL(RWsSession& aWs)
+00031         {
+00032         CEventHandler* eventHandler = new(ELeave) CEventHandler(aWs);
+00033         CleanupStack::PushL(eventHandler);
+00034         eventHandler->ConstructL();
+00035         CleanupStack::Pop(eventHandler);
+00036         return eventHandler;
+00037         }
+00038 
+00043 CEventHandler::CEventHandler(RWsSession& aWs) : CActive(CActive::EPriorityStandard),iWs(aWs)
+00044         {
+00045         }
+00046 
+00050 void CEventHandler ::ConstructL()
+00051         {
+00052         CActiveScheduler::Add(this);
+00053         }
+00054 
+00058 CEventHandler ::~CEventHandler ()
+00059         {
+00060         Cancel();
+00061         }
+00062 
+00067 void CEventHandler ::DoCancel()
+00068         {
+00069         iWs.EventReadyCancel();
+00070         }
+00071 
+00076 void CEventHandler::RunL()
+00077         {
+00078         iWs.GetEvent(iWsEvent);
+00079         TInt eventType = iWsEvent.Type();
+00080 
+00081         // Take action for the event that occurred
+00082         switch (eventType)
+00083                 {
+00084                 // Events global within window group
+00085                 case EEventNull:
+00086                         break;
+00087                 case EEventPointer:
+00088                         {
+00089                         TPointerEvent& pointerEvent = *iWsEvent.Pointer();
+00090                         HandlePointerEvent(pointerEvent);
+00091                         }
+00092                         break;
+00093                 }
+00094         // Maintain outstanding request
+00095         IssueRequest();
+00096         }
+00097 
+00103 void CEventHandler::HandlePointerEvent(TPointerEvent& aPointerEvent)
+00104         {
+00105         switch (aPointerEvent.iType)
+00106                 {
+00107                 case TPointerEvent::EButton1Down:
+00108                         {
+00109                         InfoMessage(KEventButton1Pressed);
+00110                         break;
+00111                         }
+00112                         case TPointerEvent::EButton2Down:
+00113                         {
+00114                         InfoMessage(KEventButton2Pressed);
+00115                         break;
+00116                         }
+00117                         case TPointerEvent::EButton3Down:
+00118                         {
+00119                         InfoMessage(KEventButton3Pressed);
+00120                         break;
+00121                         }
+00122                         default:
+00123                         {
+00124                         break;
+00125                         }
+00126                 }
+00127         }
+00128 
+00133 void CEventHandler::IssueRequest()
+00134         {
+00135         if(!IsActive())
+00136                 {
+00137                 iWs.EventReady(&iStatus);
+00138                 SetActive();
+00139                 }
+00140         }
+00141 
+00146 void CEventHandler::InfoMessage(const TDesC& aMsg)
+00147         {
+00148         CEikonEnv *obj = CEikonEnv::Static();
+00149         obj->InfoMsg(aMsg);
+00150         }
+00151 
+