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#ifndef ListModel_h
#define ListModel_h
//////////////////////////////////////////////////////////////////////////////
// listmodel.h
// -------------------
//
// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//////////////////////////////////////////////////////////////////////////////
#include "oxygenitemmodel.h"
#include <QSet>
#include <QList>
#include <algorithm>
namespace Oxygen
{
//* Job model. Stores job information for display in lists
template<class T> class ListModel : public ItemModel
{
public:
//* value type
using ValueType = T;
//* reference
using Reference = T&;
//* pointer
using Pointer = T*;
//* value list and iterators
using List = QList<ValueType>;
using ListIterator = QListIterator<ValueType>;
using MutableListIterator = QMutableListIterator<ValueType>;
//* constructor
ListModel(QObject *parent = nullptr):
ItemModel( parent )
{}
//*@name methods reimplemented from base class
//@{
//* flags
Qt::ItemFlags flags(const QModelIndex &index) const override
{
if (!index.isValid()) return Qt::NoItemFlags;
return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
}
//* unique index for given row, column and parent index
QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override
{
// check if index is valid
if( !hasIndex( row, column, parent ) ) return QModelIndex();
// return invalid index if parent is valid
if( parent.isValid() ) return QModelIndex();
// check against _values
return ( row < (int) _values.size() ) ? createIndex( row, column ):QModelIndex();
}
//* index of parent
QModelIndex parent(const QModelIndex &) const override
{ return QModelIndex(); }
//* number of rows below given index
int rowCount(const QModelIndex &parent = QModelIndex()) const override
{ return parent.isValid() ? 0:_values.size(); }
//@}
//*@name selection
//@{
//* clear internal list selected items
void clearSelectedIndexes( void )
{ _selection.clear(); }
//* store index internal selection state
void setIndexSelected( const QModelIndex& index, bool value )
{
if( value ) _selection.push_back( get(index) );
else _selection.erase( std::remove( _selection.begin(), _selection.end(), get(index) ), _selection.end() );
}
//* get list of internal selected items
QModelIndexList selectedIndexes( void ) const
{
QModelIndexList out;
for( typename List::const_iterator iter = _selection.begin(); iter != _selection.end(); iter++ )
{
QModelIndex index( ListModel::index( *iter ) );
if( index.isValid() ) out.push_back( index );
}
return out;
}
//@}
//*@name interface
//@{
//* add value
void add( const ValueType& value )
{
emit layoutAboutToBeChanged();
_add( value );
privateSort();
emit layoutChanged();
}
//* add values
void add( const List& values )
{
// check if not empty
// this avoids sending useless signals
if( values.empty() ) return;
emit layoutAboutToBeChanged();
for( typename List::const_iterator iter = values.begin(); iter != values.end(); iter++ )
{ _add( *iter ); }
privateSort();
emit layoutChanged();
}
//* insert values
void insert( const QModelIndex& index, const ValueType& value )
{
emit layoutAboutToBeChanged();
_insert( index, value );
emit layoutChanged();
}
//* insert values
void insert( const QModelIndex& index, const List& values )
{
emit layoutAboutToBeChanged();
// need to loop in reverse order so that the "values" ordering is preserved
ListIterator iter( values );
iter.toBack();
while( iter.hasPrevious() )
{ _insert( index, iter.previous() ); }
emit layoutChanged();
}
//* insert values
void replace( const QModelIndex& index, const ValueType& value )
{
if( !index.isValid() ) add( value );
else {
emit layoutAboutToBeChanged();
setIndexSelected( index, false );
_values[index.row()] = value;
setIndexSelected( index, true );
emit layoutChanged();
}
}
//* remove
void remove( const ValueType& value )
{
emit layoutAboutToBeChanged();
_remove( value );
emit layoutChanged();
return;
}
//* remove
void remove( const List& values )
{
// check if not empty
// this avoids sending useless signals
if( values.empty() ) return;
emit layoutAboutToBeChanged();
for( typename List::const_iterator iter = values.begin(); iter != values.end(); iter++ )
{ _remove( *iter ); }
emit layoutChanged();
return;
}
//* clear
void clear( void )
{ set( List() ); }
//* update values from list
/**
values that are not found in current are removed
new values are set to the end.
This is slower than the "set" method, but the selection is not cleared in the process
*/
void update( List values )
{
emit layoutAboutToBeChanged();
// store values to be removed
List removed_values;
// update values that are common to both lists
for( typename List::iterator iter = _values.begin(); iter != _values.end(); iter++ )
{
// see if iterator is in list
typename List::iterator found_iter( std::find( values.begin(), values.end(), *iter ) );
if( found_iter == values.end() ) removed_values.push_back( *iter );
else {
*iter = *found_iter;
values.erase( found_iter );
}
}
// remove values that have not been found in new list
for( typename List::const_iterator iter = removed_values.constBegin(); iter != removed_values.constEnd(); iter++ )
{ _remove( *iter ); }
// add remaining values
for( typename List::const_iterator iter = values.constBegin(); iter != values.constEnd(); iter++ )
{ _add( *iter ); }
privateSort();
emit layoutChanged();
}
//* set all values
void set( const List& values )
{
emit layoutAboutToBeChanged();
_values = values;
_selection.clear();
privateSort();
emit layoutChanged();
return;
}
//* return all values
const List& get( void ) const
{ return _values; }
//* return value for given index
ValueType get( const QModelIndex& index ) const
{ return (index.isValid() && index.row() < int(_values.size()) ) ? _values[index.row()]:ValueType(); }
//* return value for given index
ValueType& get( const QModelIndex& index )
{
Q_ASSERT( index.isValid() && index.row() < int( _values.size() ) );
return _values[index.row()];
}
//* return all values
List get( const QModelIndexList& indexes ) const
{
List out;
for( QModelIndexList::const_iterator iter = indexes.begin(); iter != indexes.end(); iter++ )
{ if( iter->isValid() && iter->row() < int(_values.size()) ) out.push_back( get( *iter ) ); }
return out;
}
//* return index associated to a given value
QModelIndex index( const ValueType& value, int column = 0 ) const
{
for( int row = 0; row < _values.size(); ++row )
{ if( value == _values[row] ) return index( row, column ); }
return QModelIndex();
}
//@}
//* return true if model contains given index
bool contains( const QModelIndex& index ) const
{ return index.isValid() && index.row() < _values.size(); }
private:
//* return all values
List& _get( void )
{ return _values; }
//* add, without update
void _add( const ValueType& value )
{
typename List::iterator iter = std::find( _values.begin(), _values.end(), value );
if( iter == _values.end() ) _values.push_back( value );
else *iter = value;
}
//* add, without update
void _insert( const QModelIndex& index, const ValueType& value )
{
if( !index.isValid() ) add( value );
int row = 0;
typename List::iterator iter( _values.begin() );
for( ;iter != _values.end() && row != index.row(); iter++, row++ )
{}
_values.insert( iter, value );
}
//* remove, without update
void _remove( const ValueType& value )
{
_values.erase( std::remove( _values.begin(), _values.end(), value ), _values.end() );
_selection.erase( std::remove( _selection.begin(), _selection.end(), value ), _selection.end() );
}
//* values
List _values;
//* selection
List _selection;
};
}
#endif
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