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d3bb3ff13a
So far all subclasses implemented filtering on their own which doesn't make much sense. Now one can set filter keywords and a filter type for all ResourceModels. Subclasses simply have to call ResourceModel::itemMatchesFilter( ResourceItem ) in order to determine whether an item should be hidden or not. Additionally they have to implement the updateFilters() method in order to update their internal management data each time the filters change.
119 lines
3.0 KiB
C++
119 lines
3.0 KiB
C++
/*
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* ResourceModel.h - base class for all resource models
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*
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* Copyright (c) 2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _RESOURCE_MODEL_H
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#define _RESOURCE_MODEL_H
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#include <QtCore/QAbstractItemModel>
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#include "lmms_basics.h"
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#include "ResourceDB.h"
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class ResourceModel : public QAbstractItemModel
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{
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Q_OBJECT
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public:
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ResourceModel( ResourceDB * _db, QObject * _parent = NULL );
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virtual ~ResourceModel()
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{
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}
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virtual QVariant data( const QModelIndex & _idx,
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int _role = Qt::DisplayRole ) const;
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virtual Qt::ItemFlags flags( const QModelIndex & _index ) const;
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virtual int columnCount( const QModelIndex & _parent = QModelIndex() ) const
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{
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return 1;
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}
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// return list of possible MIME types for items in this model
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virtual QStringList mimeTypes() const;
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// used for drag'n'drop - return proper MIME data for indexes
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virtual QMimeData * mimeData( const QModelIndexList & _indexes ) const;
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// return ResourceTreeItem belonging to a certain index
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static inline ResourceItem::Relation * relation( const QModelIndex & _idx )
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{
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return static_cast<ResourceItem::Relation *>( _idx.internalPointer() );
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}
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// return ResourceItem belonging to a certain index
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static inline ResourceItem * item( const QModelIndex & _idx )
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{
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return relation( _idx )->item();
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}
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int totalItems() const;
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int shownItems() const;
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QStringList keywordFilter() const
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{
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return m_keywordFilter;
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}
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ResourceItem::Type typeFilter() const
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{
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return m_typeFilter;
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}
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public slots:
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virtual void updateFilters() = 0;
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void setKeywordFilter( const QString & _keywords );
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void setTypeFilter( ResourceItem::Type _type = ResourceItem::TypeUnknown );
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protected:
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inline bool itemMatchesFilter( const ResourceItem & _item ) const
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{
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return ( likely( typeFilter() == ResourceItem::TypeUnknown ) ||
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typeFilter() == _item.type() ) &&
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( likely( m_keywordFilterSet == false ) ||
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_item.keywordMatch( keywordFilter() ) );
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}
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ResourceDB * db() const
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{
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return m_db;
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}
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private:
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ResourceDB * m_db;
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QStringList m_keywordFilter;
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bool m_keywordFilterSet;
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ResourceItem::Type m_typeFilter;
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signals:
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void itemsChanged();
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} ;
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#endif
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