author | Simon Howkins <simonh@symbian.org> |
Mon, 29 Nov 2010 11:47:03 +0000 | |
branch | RCL_3 |
changeset 78 | dbcb928abe9c |
parent 0 | 4e91876724a2 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Class that stores the active media list pointer |
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* |
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*/ |
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|
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#include "glxactivemedialistregistry.h" |
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#include <glxtracer.h> |
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#include <glxpanic.h> |
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#include <glxsingletonstore.h> |
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#include <glxlog.h> |
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#include "mglxactivemedialistchangeobserver.h" |
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|
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// ----------------------------------------------------------------------------- |
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// Return an instance |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C CGlxActiveMediaListRegistry* CGlxActiveMediaListRegistry::InstanceL( |
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MGlxActiveMediaListChangeObserver* aObserver) |
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{ |
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GLX_LOG_INFO1("CGlxActiveMediaListRegistry::InstanceL: %x", aObserver); |
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|
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CGlxActiveMediaListRegistry* obj = CGlxSingletonStore::InstanceL(&NewL); |
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|
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// Add the observer if has not already been added |
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if (aObserver && KErrNotFound == obj->iObservers.Find(aObserver)) |
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{ |
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TRAPD(err, obj->iObservers.AppendL(aObserver)); |
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// Close tls reference and leave if AppendL leaves. |
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// Otherwise there will be one reference that will be never closed |
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if (KErrNone != err) |
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{ |
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CGlxSingletonStore::Close(obj); |
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User::Leave(err); |
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} |
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} |
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return obj; |
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} |
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// ----------------------------------------------------------------------------- |
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// Return new object |
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// ----------------------------------------------------------------------------- |
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// |
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CGlxActiveMediaListRegistry* CGlxActiveMediaListRegistry::NewL() |
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{ |
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CGlxActiveMediaListRegistry* obj = new (ELeave) CGlxActiveMediaListRegistry(); |
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// (No ConstructL necessary) |
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return obj; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Constructor |
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// ----------------------------------------------------------------------------- |
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// |
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CGlxActiveMediaListRegistry::CGlxActiveMediaListRegistry() |
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{ |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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// |
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CGlxActiveMediaListRegistry::~CGlxActiveMediaListRegistry() |
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{ |
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iObservers.Close(); |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Close a reference |
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// ----------------------------------------------------------------------------- |
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// |
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void CGlxActiveMediaListRegistry::Close(MGlxActiveMediaListChangeObserver* aObserver) |
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{ |
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TRACER("CGlxActiveMediaListRegistry::Close"); |
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// Remove the observer if it has been added earlier |
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TInt index = iObservers.Find(aObserver); |
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if (KErrNotFound != index) |
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{ |
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iObservers.Remove(index); |
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} |
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|
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// Decrease reference count, and delete if last one |
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// May delete this object |
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CGlxSingletonStore::Close(this); |
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// Member variable access not safe after CGlxTls::Close() |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Register an active media list |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C void CGlxActiveMediaListRegistry::RegisterActiveMediaList(MGlxMediaList* aMediaList) |
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{ |
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GLX_LOG_INFO1("CGlxActiveMediaListRegistry::RegisterActiveMediaList: %x", aMediaList); |
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// Add to registration count if the new list is the same as the existing one |
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if (aMediaList == iActiveMediaList) |
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{ |
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__ASSERT_DEBUG(!iRegisteredTwice, Panic(EGlxPanicIllegalState)); // Cannot register three times |
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GLX_LOG_INFO("CGlxActiveMediaListRegistry::RegisterActiveMediaList: Media list registered twice"); |
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// The same media list has been registered twice |
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iRegisteredTwice = ETrue; |
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} |
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|
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// If active list has changed, pick up the new list and notify observers |
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if (iActiveMediaList != aMediaList) |
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{ |
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GLX_LOG_INFO("CGlxActiveMediaListRegistry::RegisterActiveMediaList: Media list changed"); |
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// Pick up the new list |
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iActiveMediaList = aMediaList; |
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|
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// This is the first registration |
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iRegisteredTwice = EFalse; |
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|
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// Notify observers |
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NotifyObservers(); |
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} |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Deregister an active media list |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C void CGlxActiveMediaListRegistry::DeregisterActiveMediaList(MGlxMediaList* aMediaList) |
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{ |
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GLX_LOG_INFO1("CGlxActiveMediaListRegistry::DeregisterActiveMediaList: %x", aMediaList); |
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// Ignore deregistration if another list has already been registered |
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// (Another view was activated, and it registered a list) |
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if (aMediaList == iActiveMediaList) |
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{ |
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// The list may be registered twice if the new and old view |
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// registered the same list. |
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if (iRegisteredTwice) |
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{ |
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GLX_LOG_INFO("CGlxActiveMediaListRegistry::DeregisterActiveMediaList: Remove second registration"); |
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// Remove second registration |
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iRegisteredTwice = EFalse; |
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} |
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else |
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{ |
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GLX_LOG_INFO("CGlxActiveMediaListRegistry::DeregisterActiveMediaList: Setting active list to NULL"); |
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// No new media list has been registered and current one is being |
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// deregistered, so set active list to NULL |
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iActiveMediaList = NULL; |
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|
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// Notify observers |
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NotifyObservers(); |
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} |
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} |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Notify observers |
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// ----------------------------------------------------------------------------- |
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// |
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void CGlxActiveMediaListRegistry::NotifyObservers() |
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{ |
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// Notify observers |
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for (TInt i = iObservers.Count() - 1; i >= 0; i--) |
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{ |
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iObservers[i]->HandleActiveMediaListChanged(); |
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} |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Return active media list |
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// ----------------------------------------------------------------------------- |
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// |
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MGlxMediaList* CGlxActiveMediaListRegistry::ActiveMediaList() const |
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{ |
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GLX_LOG_INFO("CGlxActiveMediaListRegistry::ActiveMediaList()"); |
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return iActiveMediaList; |
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} |