diff -r a10844a9914d -r a60f8b6b1d32 hgwidgets_pub/hgcacheproxymodel_api/inc/hgcacheproxymodel.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hgwidgets_pub/hgcacheproxymodel_api/inc/hgcacheproxymodel.h	Wed Oct 06 14:53:41 2010 +0300
@@ -0,0 +1,165 @@
+/*
+* 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:
+*
+*  Version     : %version: 6 %
+*/
+
+#ifndef HGCACHEPROXYMODEL_H_
+#define HGCACHEPROXYMODEL_H_
+
+#include <QAbstractItemModel>
+#include <QSortFilterProxyModel>
+
+#include <hgwidgets/hgdataprovidermodel.h>
+
+#ifdef BUILD_CACHEPROXYMODEL
+#define CACHEPROXYMODEL_EXPORT Q_DECL_EXPORT
+#else
+#define CACHEPROXYMODEL_EXPORT Q_DECL_IMPORT
+#endif
+
+class HgBufferManager;
+
+const int KDefaultCacheSize = 120;
+const int KDefaultCacheTreshold = 30;
+
+class HgBufferManagerObserver
+{
+public:
+    enum HgRequestOrder {
+        HgRequestOrderAscending,
+        HgRequestOrderDescending
+    };   
+
+    virtual void release(int start, int end) = 0;
+    virtual void request(int start, int end, HgRequestOrder order = HgRequestOrderAscending) = 0;  
+};
+
+class CACHEPROXYMODEL_EXPORT HgCacheProxyModel : public QAbstractItemModel, public HgBufferManagerObserver, public HgDataProviderModelObserver
+{
+    Q_OBJECT
+public:
+    HgCacheProxyModel(QObject *parent = 0);
+    ~HgCacheProxyModel();   
+    
+    void setDataProvider(HgDataProviderModel *dataProvider, int cacheSize = KDefaultCacheSize, int cacheTreshold = KDefaultCacheTreshold);
+    HgDataProviderModel* DataProvider();
+    void resizeCache(int newSize, int newTreshold);
+    
+//from QAbstractItemModel
+    virtual QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
+    virtual QModelIndex parent(const QModelIndex &child) const;
+    virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
+    virtual int columnCount(const QModelIndex &parent = QModelIndex()) const;
+    virtual bool hasChildren(const QModelIndex &parent = QModelIndex()) const;
+    virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+    virtual bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);
+    virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
+    virtual bool setHeaderData(int section, Qt::Orientation orientation, const QVariant &value, int role = Qt::EditRole);
+    virtual QMap<int, QVariant> itemData(const QModelIndex &index) const;
+    virtual bool setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles);
+    virtual QStringList mimeTypes() const;
+    virtual QMimeData *mimeData(const QModelIndexList &indexes) const;
+    virtual bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent);
+    virtual Qt::DropActions supportedDropActions() const;
+    virtual bool insertRows(int row, int count, const QModelIndex &parent = QModelIndex());
+    virtual bool insertColumns(int column, int count, const QModelIndex &parent = QModelIndex());
+    virtual bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
+    virtual bool removeColumns(int column, int count, const QModelIndex &parent = QModelIndex());
+    virtual void fetchMore(const QModelIndex &parent);
+    virtual bool canFetchMore(const QModelIndex &parent) const;
+    virtual Qt::ItemFlags flags(const QModelIndex &index) const;
+    virtual void sort(int column, Qt::SortOrder order = Qt::AscendingOrder);
+    virtual QModelIndex buddy(const QModelIndex &index) const;
+    virtual QModelIndexList match(const QModelIndex &start, int role,
+                                  const QVariant &value, int hits = 1,
+                                  Qt::MatchFlags flags =
+                                  Qt::MatchFlags(Qt::MatchStartsWith|Qt::MatchWrap)) const;
+    virtual QSize span(const QModelIndex &index) const;
+
+// for sorting
+    Qt::CaseSensitivity sortCaseSensitivity() const;
+    void setSortCaseSensitivity(Qt::CaseSensitivity cs);
+    bool isSortLocaleAware() const;
+    void setSortLocaleAware(bool on);
+    int sortColumn() const;
+    Qt::SortOrder sortOrder() const;
+    bool dynamicSortFilter() const;
+    void setDynamicSortFilter(bool enable);
+    int sortRole() const;
+    void setSortRole(int role);
+
+//for filtering
+    QRegExp filterRegExp() const;
+    void setFilterRegExp(const QRegExp &regExp);
+    int filterKeyColumn() const;
+    void setFilterKeyColumn(int column);
+    Qt::CaseSensitivity filterCaseSensitivity() const;
+    void setFilterCaseSensitivity(Qt::CaseSensitivity cs);
+    int filterRole() const;
+    void setFilterRole(int role);
+    
+public slots:
+    virtual bool submit();
+    virtual void revert();
+    
+public:
+//from HgBufferManagerObserver
+    virtual void release(int start, int end);
+    virtual void request(int start, int end, HgRequestOrder order = HgRequestOrderAscending);  
+    
+private:
+    int count()const;
+    QModelIndex mapToSource(const QModelIndex &index)const;
+    QModelIndex mapToSource(int row, int col) const;
+    int mapToDataProviderIndex(int myIndex) const;
+    int mapFromDataProviderIndex(int myIndex) const;
+    void releaseAll();
+    void setBufferPosition(int pos) const;
+    
+private slots:
+    void sourceColumnsAboutToBeInserted( const QModelIndex & parent, int start, int end);
+    void sourceColumnsAboutToBeMoved( const QModelIndex & sourceParent, int sourceStart, int sourceEnd, const QModelIndex & destinationParent, int destinationColumn );
+    void sourceColumnsAboutToBeRemoved( const QModelIndex & parent, int start, int end);
+    void sourceColumnsInserted( const QModelIndex & parent, int start, int end );
+    void sourceColumnsMoved( const QModelIndex & sourceParent, int sourceStart, int sourceEnd, const QModelIndex & destinationParent, int destinationColumn );
+    void sourceColumnsRemoved( const QModelIndex & parent, int start, int end );
+    void sourceDataChanged( const QModelIndex & topLeft, const QModelIndex & bottomRight );
+    void sourceHeaderDataChanged( Qt::Orientation orientation, int first, int last );
+    void sourceLayoutAboutToBeChanged();
+    void sourceLayoutChanged();
+    void sourceModelAboutToBeReset();
+    void sourceModelReset();
+    void sourceRowsAboutToBeInserted( const QModelIndex & parent, int start, int end );
+    void sourceRowsAboutToBeMoved( const QModelIndex & sourceParent, int sourceStart, int sourceEnd, const QModelIndex & destinationParent, int destinationRow );
+    void sourceRowsAboutToBeRemoved( const QModelIndex & parent, int start, int end );
+    void sourceRowsInserted( const QModelIndex & parent, int start, int end );
+    void sourceRowsMoved( const QModelIndex & sourceParent, int sourceStart, int sourceEnd, const QModelIndex & destinationParent, int destinationRow );
+    void sourceRowsRemoved( const QModelIndex & parent, int start, int end );
+    
+//from HgDataProviderModelObserver    
+public:
+    virtual void dataUpdated(int from, int to);
+    virtual bool isCached(int idx) const;
+    
+private:
+    HgBufferManager* mBufferManager;
+    QSortFilterProxyModel* mSortFilterProxyModel;
+    HgDataProviderModel* mDataProviderModel;
+    mutable bool mSupressBM;
+    mutable int mCurrentPos;
+};
+
+#endif // HGCACHEPROXYMODEL_H_