--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/visuallistmanager/src/glxvisuallistmanager.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,227 @@
+/*
+* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:    Visual list manager
+*
+*/
+
+
+
+
+/**
+ * @internal reviewed 04/07/2007 by M Byrne
+ */
+
+#include <coemain.h>
+
+#include <alf/alfimagevisual.h>
+#include <alf/alfanchorlayout.h>
+#include <alf/alfenv.h> 
+#include <alf/alfbrush.h>
+#include <alf/alfcontrolgroup.h>
+
+#include <glxlog.h>
+#include <glxtracer.h>
+
+#include "mglxmedialist.h"
+
+#include "mglxvisuallistobserver.h" 
+#include "glxitemvisual.h"
+#include "glxvisuallistcontrol.h"
+#include "glxvisuallistmanager.h" 
+
+/**
+ * CGlxVlmTls
+ *
+ * Global object stored in TLS. 
+ * Owns the only instance of a Visual List Manager.
+ */
+struct CGlxVlmTls
+	{
+	CGlxVlmTls(CGlxVisualListManager* aListManager) 
+		{
+		iListManager = aListManager;
+		iReferenceCount = 0;
+		}
+		
+	CGlxVisualListManager* iListManager;
+	TInt iReferenceCount;
+	};
+	
+// -----------------------------------------------------------------------------
+// ManagerL
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CGlxVisualListManager* CGlxVisualListManager::ManagerL()
+	{
+	TRACER("CGlxVisualListManager::ManagerL");
+    GLX_LOG_INFO("CGlxVisualListManager::ManagerL");
+	CGlxVlmTls* tls = reinterpret_cast<CGlxVlmTls*>(Dll::Tls());
+
+	// Create tls struct if does not exist
+	if (tls == NULL) 
+		{
+		// Create list manager instance
+		CGlxVisualListManager* lm = new (ELeave) CGlxVisualListManager();
+		CleanupStack::PushL(lm);
+      	tls = new (ELeave) CGlxVlmTls(lm);
+
+		// MUST NOT LEAVE AFTER THIS POINT
+		CleanupStack::Pop(lm);
+		
+        Dll::SetTls( reinterpret_cast<TAny*>(tls));
+		}
+		
+	// Add user	
+	tls->iReferenceCount++;
+	
+	return tls->iListManager;
+	}
+
+// -----------------------------------------------------------------------------
+// Close
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CGlxVisualListManager::Close()
+	{
+	
+	TRACER("CGlxVisualListManager::Close");
+    GLX_LOG_INFO("CGlxVisualListManager::Close");
+	CGlxVlmTls* tls = reinterpret_cast<CGlxVlmTls*>(Dll::Tls());
+	__ASSERT_DEBUG(tls != NULL, Panic(EGlxPanicLogicError));
+	__ASSERT_DEBUG(tls->iReferenceCount > 0, Panic(EGlxPanicLogicError)); // There's nothign to close
+
+    if (tls != NULL) 
+    	{
+		tls->iReferenceCount--;
+		
+		// Delete the tls pointer and list manager instance if this was the 
+		// last reference
+    	if (tls->iReferenceCount == 0)
+	        {
+	        delete tls->iListManager;
+    	    delete tls;
+        	Dll::SetTls(NULL);
+	        }
+    	}	
+	}
+
+// -----------------------------------------------------------------------------
+// Constructor
+// -----------------------------------------------------------------------------
+//
+CGlxVisualListManager::CGlxVisualListManager()
+	{
+	// No implementation
+	}
+
+// -----------------------------------------------------------------------------
+// Destructor
+// -----------------------------------------------------------------------------
+//
+CGlxVisualListManager::~CGlxVisualListManager()
+	{
+	iVisualLists.Close();
+	}
+
+// -----------------------------------------------------------------------------
+// AllocListL
+// -----------------------------------------------------------------------------
+//
+EXPORT_C MGlxVisualList* CGlxVisualListManager::AllocListL(
+        MGlxMediaList& aMediaList, CAlfEnv& aEnv, CAlfDisplay& aDisplay,
+        CAlfImageVisual::TScaleMode aThumbnailScaleMode )
+    {
+    TRACER("CGlxVisualListManager::AllocListL");
+    GLX_LOG_INFO("CGlxVisualListManager::AllocListL");
+   __ASSERT_DEBUG( &aMediaList, Panic(EGlxPanicNullPointer));
+
+    CGlxVisualListControl* lc = CGlxVisualListControl::NewLC(aMediaList, 
+                                        aEnv, aDisplay, aThumbnailScaleMode);
+    iVisualLists.AppendL(lc);
+    lc->AddReference(); // Add first user
+    CleanupStack::Pop(lc);
+    return lc;
+    }
+
+// -----------------------------------------------------------------------------
+// ListL
+// -----------------------------------------------------------------------------
+//	
+EXPORT_C MGlxVisualList* CGlxVisualListManager::ListL(
+        MGlxMediaList& aItemList,
+        CAlfEnv& aEnv, CAlfDisplay& aDisplay,
+        CAlfImageVisual::TScaleMode aThumbnailScaleMode)
+    {
+    TRACER("CGlxVisualListManager::ListL");
+    GLX_LOG_INFO("CGlxVisualListManager::ListL");
+    __ASSERT_DEBUG( &aItemList, Panic(EGlxPanicNullPointer) );
+
+    // Try to find an existing visual list with the same media list
+    MGlxVisualList* visList = NULL;
+
+    // search in existing list
+    TInt listCount = iVisualLists.Count();
+    for ( TInt i = 0; i < listCount; i++ )
+        {
+        if ( &iVisualLists[i]->MediaList() == &aItemList
+            && iVisualLists[i]->ThumbnailScaleMode() == aThumbnailScaleMode)
+            {
+            visList = iVisualLists[i];
+            iVisualLists[i]->AddReference();
+            break;
+            }
+        }
+
+    // if not found allocate a new one
+    if ( !visList )
+        {
+        visList = AllocListL(aItemList, aEnv, aDisplay, aThumbnailScaleMode);
+        }
+
+    return visList;
+    }
+
+// -----------------------------------------------------------------------------
+// Removes a reference to the list, an deletes it if no more references remain
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CGlxVisualListManager::ReleaseList(MGlxVisualList* aList)
+	{
+	TRACER("CGlxVisualListManager::ReleaseList");
+    GLX_LOG_INFO("CGlxVisualListManager::ReleaseList");
+	if (aList == NULL) 
+		{
+		return;
+		}
+	
+	TGlxVisualListId id = aList->Id();
+	TInt count = iVisualLists.Count();
+	for (TInt i = 0; i < count; i++)
+		{
+		CGlxVisualListControl* list = iVisualLists[i];
+		if (list->Id() == id)
+			{
+			TInt refsLeft = list->RemoveReference();
+			if (refsLeft == 0)
+				{
+				// No users left, delete
+				delete list;
+				iVisualLists.Remove(i);
+				}
+			break;
+			}
+		}
+	}	
+
+