diff -r c18f9fa7f42e -r 640d30f4fb64 phonebookui/cntlistmodel/cnticonfetcher.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/phonebookui/cntlistmodel/cnticonfetcher.cpp	Fri Oct 15 12:24:46 2010 +0300
@@ -0,0 +1,139 @@
+/*
+* Copyright (c) 2010 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: Fetches icons for contacts.
+*
+*/
+
+#include <thumbnailmanager_qt.h>
+#include <cnticonfetcher.h>
+#include <cntdebug.h>
+
+// maximum amount of scheduled jobs; if there are more jobs, the least
+// important job is cancelled
+const int MaxIconJobs = 20;
+
+// the id that states that no icon is currently pending from thumbnail manager
+const int NoIconRequest = -1;
+
+/*!
+    \class CntIconJob
+    \brief Holds info about one icon job.
+ */
+
+/*!
+    \class CntIconFetcher
+    \brief CntIconFetcher asynchronously fetches contact icons.
+
+    CntIconFetcher queues requests for contact icons that are to be cached.
+    It fetches the icons later, when asked by the client to do so.
+
+    Internally CntIconFetcher uses thumbnail manager to fetch the icons.
+ */
+
+/*!
+    Creates a CntIconFetcher object.
+ */
+CntIconFetcher::CntIconFetcher()
+    : CntAbstractFetcher(MaxIconJobs),
+      mThumbnailManager(NULL),
+      mIconRequestId(NoIconRequest)
+{
+    CNT_ENTRY
+
+    // create & connect the thumbnail manager
+    mThumbnailManager = new ThumbnailManager(this);
+    mThumbnailManager->setMode(ThumbnailManager::Default);
+    mThumbnailManager->setQualityPreference(ThumbnailManager::OptimizeForPerformance);
+    mThumbnailManager->setThumbnailSize(ThumbnailManager::ThumbnailSmall);
+    connect(mThumbnailManager, SIGNAL(thumbnailReady(QPixmap, void *, int, int)),
+            this, SLOT(forwardIconToClient(QPixmap, void *, int, int)));
+
+    CNT_EXIT
+}
+
+/*!
+    Cleans up and destructs the CntIconFetcher object.
+ */
+CntIconFetcher::~CntIconFetcher()
+{
+    CNT_ENTRY
+
+    if (mIconRequestId != NoIconRequest) {
+        mThumbnailManager->cancelRequest(mIconRequestId);
+    }
+
+    delete mThumbnailManager;
+    mThumbnailManager = NULL;
+
+    CNT_EXIT
+}
+
+/*!
+    Processes the next scheduled job. This function must not be
+    called until the previous job has completed.
+ */
+void CntIconFetcher::processNextJob()
+{
+    CNT_ENTRY
+
+    Q_ASSERT(mIconRequestId == NoIconRequest);
+
+    if (hasScheduledJobs()) {
+        // request icon from thumbnail manager
+        CntIconJob *job = static_cast<CntIconJob *>(takeNextJob());
+        mIconRequestName = job->iconName;
+        mIconRequestId = mThumbnailManager->getThumbnail(mIconRequestName, NULL, 0);
+        delete job;
+    } else if (hasCancelledJobs()) {
+        CntIconJob *job = static_cast<CntIconJob *>(takeNextCancelledJob());
+        emit iconCancelled(job->iconName);
+        delete job;
+    }
+
+    CNT_EXIT
+}
+
+/*!
+    \return true if a job is currently being processed; otherwise returns false.
+ */
+bool CntIconFetcher::isProcessingJob()
+{
+    return (mIconRequestId != NoIconRequest);
+}
+
+/*!
+    Forwards an icon from thumbnail manager to the client.
+ */
+void CntIconFetcher::forwardIconToClient(const QPixmap &pixmap, void *data, int id, int error)
+{
+    CNT_ENTRY
+
+    Q_UNUSED(data);
+
+    if (id != mIconRequestId) {
+        // this pixmap was requested by someone else sharing the same thumbnail manager instance
+        CNT_EXIT_ARGS("not our pixmap")
+        return;
+    }
+
+    mIconRequestId = NoIconRequest;
+
+    if (error == 0) {
+        emit iconFetched(mIconRequestName, HbIcon(pixmap));
+    } else {
+        emit iconFetched(mIconRequestName, HbIcon());
+    }
+
+    CNT_EXIT
+}