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/*
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* Copyright (c) 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:
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*
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* Version : %version: 11 %
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*/
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#ifndef HGDATAPROVIDERMODEL_H_
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#define HGDATAPROVIDERMODEL_H_
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#include <QObject>
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#include <QList>
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#include <QPair>
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#include <QPixmap>
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#include <QMap>
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#include <QMutex>
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#include <QAbstractItemModel>
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class HbIcon;
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class QVariant;
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class HgCacheProxyModel;
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#ifdef BUILD_CACHEPROXYMODEL
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#define CACHEPROXYMODEL_EXPORT Q_DECL_EXPORT
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#else
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#define CACHEPROXYMODEL_EXPORT Q_DECL_IMPORT
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#endif
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class HgDataProviderModelObserver
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{
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public:
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virtual void dataUpdated(int from, int to) = 0;
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virtual bool isCached(int idx) const = 0;
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};
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class CACHEPROXYMODEL_EXPORT HgDataProviderModel : public QAbstractItemModel
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{
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Q_OBJECT
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public:
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HgDataProviderModel(QObject *parent = 0);
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~HgDataProviderModel();
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//to cooperate with buffer manager
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void release(QList<int> list, bool silent = true);
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void request(QList<int> list, bool silent = false);
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virtual void doReleaseData(QList<int> list, bool silent) = 0;
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virtual void doRequestData(QList<int> list, bool silent) = 0;
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void registerObserver(HgDataProviderModelObserver* obs);
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public:
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//from QAbstractItemModel
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QModelIndex index(int row, int column,
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const QModelIndex &parent = QModelIndex()) const;
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virtual QModelIndex parent(const QModelIndex &child) const;
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virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
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virtual int columnCount(const QModelIndex &parent = QModelIndex()) const;
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virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
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virtual QMap<int, QVariant> itemData(const QModelIndex &index) const;
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//cache management
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protected:
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QVariant data(int idx, int role) const;
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void clearCache();
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int count() const;
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bool update(int pos, QVariant obj, int role, bool silent = false);
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bool update(int pos, QList< QPair< QVariant, int > >* list, bool silent = false);
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bool updateIcon(int pos, QVariant obj, bool silent = false);
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void resetIcon(int idx);
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void newItem(QList< QPair< QVariant, int > >* list = NULL, bool silent = true);
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void newItem(QPair< QVariant, int > item, bool silent = true);
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void insertItem(int pos, QList< QPair< QVariant, int > >* list = NULL, bool silent = true);
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void insertItem(int pos, QPair< QVariant, int > item, bool silent = true);
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void clearItem(int pos, bool silent = false);
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private:
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void doInsertItem(int pos, QList< QPair< QVariant, int > >* list, bool silent);
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protected:
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void removeItem(int pos, bool silent = false);
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void removeItems(int pos, int size, bool silent = false);
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virtual QVariant defaultIcon() const = 0;
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inline bool containsRole(int idx, int role) const;
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inline bool isIndexValid(int idx) const;
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bool isCached(int idx) const;
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public:
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void resetModel();
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enum HgDataProviderIconMode {
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HgDataProviderIconHbIcon,
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HgDataProviderIconQIcon,
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HgDataProviderIconQImage,
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HgDataProviderIconQPixmap
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};
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void setIconMode(HgDataProviderIconMode mode);
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HgDataProviderIconMode iconMode();
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protected:
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virtual void doResetModel() {};
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virtual QVariant getData(int idx, int role) const {Q_UNUSED(idx); Q_UNUSED(role); return QVariant(); };
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// helpers fot emits
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protected:
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void emitDataChanged(int start, int end, bool silent);
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//QPixmap pool
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public:
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void resizeQPixmapPool(int size);
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protected:
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void releasePixmap(int idx);
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QVariant createIcon(int index, QPixmap aPixmap);
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private:
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QPixmap* getPixmap(int idx);
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private:
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QList<QMap<int, QVariant>*>* mCache;
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int mCacheSize; //Number of cached Icons. Not same as mCache->count()
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QList< QPixmap* > mFreePixmaps;
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QMap< int, QPixmap* > mUsedPixmaps;
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int mUnallocatedPixmaps;
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QMutex mQPixmapsLock;
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QMutex mDataLock;
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HgDataProviderModelObserver *mObserver;
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HgDataProviderIconMode mIconMode;
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};
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inline bool HgDataProviderModel::isIndexValid(int idx) const
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{
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return ((idx >= 0) &&
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(idx < mCache->size()) &&
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(mCache->at(idx)));
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}
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inline bool HgDataProviderModel::containsRole(int idx, int role) const
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{
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return ( isIndexValid(idx) &&
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mCache->at(idx)->contains(role) );
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}
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#endif // HGDATAPROVIDERMODEL_H_
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