added ResourcesTreeModel, a QAbstractModelItem implementation for ResourcesDB
git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1858 0778d3d1-df1d-0410-868b-ea421aaaa00d
This commit is contained in:
Tobias Doerffel
83
include/resources_tree_model.h
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83
include/resources_tree_model.h
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/*
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* resources_tree_model.h - tree-model for ResourcesDB
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*
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* Copyright (c) 2008 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 _RESOURCES_TREE_MODEL_H
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#define _RESOURCES_TREE_MODEL_H
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#include <QtCore/QAbstractItemModel>
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#include "resources_db.h"
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class ResourcesTreeModel : public QAbstractItemModel
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{
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Q_OBJECT
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public:
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ResourcesTreeModel( ResourcesDB * _db, QObject * _parent = NULL );
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virtual ~ResourcesTreeModel()
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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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{
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return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
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}
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int rowCount( const QModelIndex & _parent = QModelIndex() ) const;
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virtual int columnCount( const QModelIndex & _parent =
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QModelIndex() ) const
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{
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return 1;
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}
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virtual QModelIndex index( int _row, int _col,
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const QModelIndex & _parent = QModelIndex() ) const;
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virtual QModelIndex parent ( const QModelIndex & index ) const;
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void setFilter( const QString & _s );
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private:
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bool filterItems( ResourcesDB::TreeItem * _item,
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const QModelIndex & _parent,
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const QStringList & _keywords );
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void setHidden( ResourcesDB::TreeItem * _item,
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const QModelIndex & _parent,
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bool _hidden,
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bool _recursive = true );
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ResourcesDB * m_db;
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signals:
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void itemsChanged( void );
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} ;
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#endif
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240
src/core/resources_tree_model.cpp
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240
src/core/resources_tree_model.cpp
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@@ -0,0 +1,240 @@
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/*
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* resources_tree_model.cpp - implementation of ResourcesTreeModel
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*
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* Copyright (c) 2008 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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#include "resources_tree_model.h"
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ResourcesTreeModel::ResourcesTreeModel( ResourcesDB * _db, QObject * _parent ) :
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QAbstractItemModel( _parent ),
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m_db( _db )
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{
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connect( m_db, SIGNAL( itemsChanged() ),
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this, SIGNAL( itemsChanged() ) );
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/* connect( m_db, SIGNAL( itemsChanged() ),
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this, SIGNAL( layoutChanged() ) );*/
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}
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QVariant ResourcesTreeModel::data( const QModelIndex & _idx, int _role ) const
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{
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if( _idx.isValid() && _role == Qt::DisplayRole )
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{
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ResourcesDB::TreeItem * item =
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static_cast<ResourcesDB::TreeItem *>(
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_idx.internalPointer() );
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return item->item()->name();
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}
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return QVariant();
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}
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int ResourcesTreeModel::rowCount( const QModelIndex & _parent ) const
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{
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ResourcesDB::TreeItem * parentItem;
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if( _parent.column() > 0 )
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{
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return 0;
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}
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if( !_parent.isValid() )
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{
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parentItem = m_db->topLevelNode();
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}
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else
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{
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parentItem = static_cast<ResourcesDB::TreeItem *>(
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_parent.internalPointer() );
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}
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return parentItem->rowCount();
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}
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QModelIndex ResourcesTreeModel::index( int _row, int _col,
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const QModelIndex & _parent ) const
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{
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if( !hasIndex( _row, _col, _parent ) )
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{
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return QModelIndex();
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}
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ResourcesDB::TreeItem * parentItem;
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if( !_parent.isValid() )
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{
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parentItem = m_db->topLevelNode();
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}
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else
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{
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parentItem = static_cast<ResourcesDB::TreeItem *>(
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_parent.internalPointer() );
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}
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if( _row < parentItem->rowCount() )
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{
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return createIndex( _row, _col, parentItem->getChild( _row ) );
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}
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return QModelIndex();
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}
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QModelIndex ResourcesTreeModel::parent( const QModelIndex & _idx ) const
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{
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if( !_idx.isValid() )
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{
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return QModelIndex();
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}
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ResourcesDB::TreeItem * childItem =
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static_cast<ResourcesDB::TreeItem *>(
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_idx.internalPointer() );
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ResourcesDB::TreeItem * parentItem = childItem->parent();
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if( parentItem == m_db->topLevelNode() )
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{
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return QModelIndex();
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}
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int row = 0;
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if( parentItem )
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{
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row = parentItem->row();
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}
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return createIndex( row, 0, parentItem );
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}
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void ResourcesTreeModel::setFilter( const QString & _s )
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{
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filterItems( m_db->topLevelNode(),
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createIndex( 0, 0, m_db->topLevelNode() ),
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_s.toLower().split( " " ) );
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if( _s.isEmpty() )
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{
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emit layoutChanged();
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}
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}
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bool ResourcesTreeModel::filterItems( ResourcesDB::TreeItem * _item,
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const QModelIndex & _parent,
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const QStringList & _keywords )
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{
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if( _item->item() )
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{
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ResourcesDB::Item * i = _item->item();
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bool accept = true;
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for( QStringList::ConstIterator it = _keywords.begin();
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it != _keywords.end(); ++it )
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{
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if( !( i->name().toLower().contains( *it ) ||
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i->path().toLower().contains( *it ) ||
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i->tags().toLower().contains( *it ) ) )
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{
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accept = false;
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break;
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}
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}
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if( accept )
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{
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setHidden( _item, _parent, false );
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return true;
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}
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}
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int row = 0;
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bool hide = true;
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for( QList<ResourcesDB::TreeItem>::Iterator it =
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_item->children().begin();
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it != _item->children().end(); ++it )
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{
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QModelIndex idx = createIndex( row, 0, &( *it ) );
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if( filterItems( &( *it ), idx , _keywords ) )
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{
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hide = false;
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}
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++row;
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}
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setHidden( _item, _parent, hide, false );
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return !hide;
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}
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void ResourcesTreeModel::setHidden( ResourcesDB::TreeItem * _item,
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const QModelIndex & _parent,
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bool _hide, bool _recursive )
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{
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if( _recursive )
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{
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int row = 0;
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for( QList<ResourcesDB::TreeItem>::Iterator it =
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_item->children().begin();
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it != _item->children().end(); ++it )
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{
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setHidden( &( *it ), createIndex( row, 0, &( *it ) ),
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_hide );
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++row;
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}
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}
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if( _item->isHidden() != _hide )
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{
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_item->setHidden( _hide );
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/* if( _hide )
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{
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int row = _item->row();
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beginRemoveRows( _parent, row, row );
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_item->setHidden( true );
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endRemoveRows();
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}
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else
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{
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_item->setHidden( false );
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int row = _item->row();
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beginInsertRows( _parent, row, row );
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endInsertRows();
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}*/
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}
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}
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#include "moc_resources_tree_model.cxx"
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