diff -r 87476091b3f5 -r 1db7cc813a4e homescreenapp/stateplugins/hsapplibrarystateplugin/src/hsaddmodeproxymodel.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/homescreenapp/stateplugins/hsapplibrarystateplugin/src/hsaddmodeproxymodel.cpp	Fri Aug 06 13:36:36 2010 +0300
@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 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: Proxy model for view in add to homescreen mode.
+ *
+ */
+
+#include <QObject>
+#include <canotifier.h>
+
+#include "hscontentservice.h"
+#include "hsaddmodeproxymodel.h"
+#include "hsmenuitemmodel.h"
+#include "hsapplibstateutils.h"
+
+/*!
+ \class HsAddModeProxyModel
+ \ingroup group_hsmenustateplugin
+ \brief Proxy Model for add to homescreen mode.
+ Filtering cwrt widgets to not displaing them in add mode when they are alredy present on HS.
+ \lib ?library
+ \see QSortFilterProxyModel
+ */
+
+/*!
+ Constructor.
+ \param parent parent for object.
+ */
+HsAddModeProxyModel::HsAddModeProxyModel(QObject *parent) :
+    QSortFilterProxyModel(parent),
+    mCwrtWidgetCache(),
+    mQuery()
+{
+    initilizeCwrtWidgetCache();
+    invalidateFilter();
+    connect(HsContentService::instance(),
+        SIGNAL(widgetAdded(const QString &, const QVariantHash &)),
+        this, SLOT(updateCacheOnAddWidget(const QString&, const QVariantHash&)));
+    connect(HsContentService::instance(),
+        SIGNAL(widgetRemoved(const QString &, const QVariantHash &)),
+        this, SLOT(updateCacheOnRemoveWidget(const QString&, const QVariantHash&)));
+    // create notifier for a cwrt widgets with query created in initilizeCwrtWidgetCache
+    CaNotifierFilter filter(mQuery);
+    mNotifier.reset(CaService::instance()->createNotifier(filter));
+    connect(mNotifier.data(),
+            SIGNAL(entryChanged(const CaEntry&, ChangeType)),
+            this,
+            SLOT(updateEntryStatus(const CaEntry&, ChangeType)));
+}
+
+/*
+ Destructor.
+ */
+HsAddModeProxyModel::~HsAddModeProxyModel()
+{
+}
+
+void HsAddModeProxyModel::initilizeCwrtWidgetCache()
+{
+    QStringList entryTypeNames;
+    entryTypeNames.append(applicationTypeName());
+    mQuery.setEntryTypeNames(entryTypeNames);
+    mQuery.setAttribute(swTypeKey(), HS_CWRT_APP_TYPE);
+    mQuery.setAttribute(widgetUriAttributeName(),
+                       HS_WIDGET_URI_ATTRIBUTE_CWRT_VALUE);
+    QList< QSharedPointer<CaEntry> > entries =
+            CaService::instance()->getEntries(mQuery);
+    foreach (QSharedPointer<CaEntry> entry, entries) {
+        QVariantHash preferences;
+        QMap<QString, QString> attributes = entry->attributes();
+        QMapIterator<QString, QString> i(attributes);
+        while (i.hasNext()) {
+            i.next();
+            QString key(i.key());
+            QString value(i.value());
+            if (key.contains(widgetParam())) {
+                preferences.insert(key.remove(widgetParam()),value);
+            }
+        }
+        int count(0);
+        HsContentService::instance()->widgets(
+                HS_WIDGET_URI_ATTRIBUTE_CWRT_VALUE,preferences,count);
+        mCwrtWidgetCache.insert(entry->id(), count > 0);
+    }
+
+}
+
+/*!
+ Return entryid for given Cwrt with mini view widget.
+ \param uri of a widget.
+ \param preferences widget preferences.
+ \retval int entry id or 0 for not cwrt with mini view widgets.
+ */
+int HsAddModeProxyModel::findCwrtWidgetEntryId(const QVariantHash &preferences)
+{
+    int result = 0;
+    CaQuery query;
+    QStringList entryTypeNames;
+    query.setEntryTypeNames(entryTypeNames);
+    query.setAttribute(swTypeKey(), HS_CWRT_APP_TYPE);
+    query.setAttribute(widgetUriAttributeName(),
+            HS_WIDGET_URI_ATTRIBUTE_CWRT_VALUE);
+    foreach (QString key, preferences.keys()) {
+        query.setAttribute(widgetParam()+key,
+            preferences.value(key).toString());
+    }
+    QList< QSharedPointer<CaEntry> > entries =
+        CaService::instance()->getEntries(query);
+    if( entries.count() > 0 )
+    {
+        result = entries[0]->id();
+    }
+    return result;
+}
+
+/*
+ Slot called when widget is added to homescreen.
+ If widget is removed we checkhow many instance of this widget is left on HS.
+ \param uri of a widget.
+ \param preferences widget preferences.
+ */
+void HsAddModeProxyModel::updateCacheOnAddWidget(const QString &uri,
+    const QVariantHash &preferences){
+	if (uri == HS_WIDGET_URI_ATTRIBUTE_CWRT_VALUE) {
+        int entryId = findCwrtWidgetEntryId(preferences);
+        if (!mCwrtWidgetCache.value(entryId) ) {
+            mCwrtWidgetCache.insert(entryId,true);
+            invalidateFilter();
+        }
+    }
+}
+
+/*
+ Slot called when widget is removed from homescreen.
+ If widget is removed we checkhow many instance of this widget is left on HS.
+ \param uri of a widget.
+ \param preferences widget preferences.
+*/
+void HsAddModeProxyModel::updateCacheOnRemoveWidget(const QString &uri,
+    const QVariantHash &preferences)
+{
+    if (uri == HS_WIDGET_URI_ATTRIBUTE_CWRT_VALUE) {
+        int entryId = findCwrtWidgetEntryId(preferences);
+        if (mCwrtWidgetCache.value(entryId)) {
+            mCwrtWidgetCache.insert(entryId,false);
+            invalidateFilter();
+        }
+    }
+}
+
+/*
+ Reimplementated from QSortFilterProxyModel.
+ \param source_row row in source model.
+ \param source_parent source parent index.
+ */
+bool HsAddModeProxyModel::filterAcceptsRow(int source_row,
+        const QModelIndex &source_parent) const
+{
+    QVariant entryId = sourceModel()->data(
+            sourceModel()->index(source_row,0,source_parent),
+            CaItemModel::IdRole);
+    return !mCwrtWidgetCache.value(entryId.toInt());
+}
+
+/*
+ Update cache if some cwrt widgets were install/uninstal/update or on mmc card.
+ \param entry changed entry.
+ \param changeType the type of the change. 
+ */
+void HsAddModeProxyModel::updateEntryStatus(const CaEntry &entry, ChangeType changeType)
+{
+    if (changeType == RemoveChangeType) {
+        mCwrtWidgetCache.remove(entry.id());
+    } else {
+        mCwrtWidgetCache.insert(entry.id(),
+            HsAppLibStateUtils::isCWRTWidgetOnHomeScreen(&entry));
+    }
+}