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AlphanumSortProxyModel.h
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AlphanumSortProxyModel.h
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#ifndef ALPHANUMSORTPROXYMODEL_H
#define ALPHANUMSORTPROXYMODEL_H
#include <QSortFilterProxyModel>
#include "AlphanumComparer.h"
#include "ColumnsSorter.h"
class AlphanumSortProxyModel : public QSortFilterProxyModel
{
Q_OBJECT
public:
explicit AlphanumSortProxyModel( QObject *parent = 0 ) :
QSortFilterProxyModel( parent ) { }
// Reimplemented to show order of column in common sorting if needed
// and sorting icon of column
virtual QVariant headerData ( int section,
Qt::Orientation orientation,
int role = Qt::DisplayRole ) const
{
if( orientation == Qt::Horizontal ) {
switch ( role )
{
case Qt::DisplayRole: {
QString header = sourceModel()->headerData( section, orientation ).toString();
if ( m_columnSorter.columnsCount() > 1 &&
m_columnSorter.columnOrder( section ) >= 0 ) {
header.insert(0, QString::number( m_columnSorter.columnOrder( section ) + 1 ) + ": " );
}
return header;
}
case Qt::DecorationRole: {
return m_columnSorter.columnIcon( section );
}
default: {
return QSortFilterProxyModel::headerData(section, orientation, role);
}
}
}
// Row number
return section + 1;
}
// Sort column
void sortColumn ( int column, bool isModifierPressed = false )
{
m_columnSorter.sortColumn( column, isModifierPressed );
// "count-1" becouse indexes are started from zero value
for( int i = m_columnSorter.columnsCount()-1; i >= 0; --i) {
int col = m_columnSorter.columnIndex( i );
sort( col, m_columnSorter.columnSortOrder( col ) );
}
}
// Set icons to decorate sorted table headers
void setSortIcons( QIcon ascIcon, QIcon descIcon )
{
m_columnSorter.setIcons( ascIcon, descIcon );
}
protected:
// Reimplemented to use alphanum sorting
virtual bool lessThan ( const QModelIndex & left,
const QModelIndex & right ) const
{
QVariant leftData = sourceModel()->data(left),
rightData = sourceModel()->data(right);
return AlphanumComparer::lessThan( leftData.toString(),
rightData.toString() );
}
private:
ColumnsSorter m_columnSorter;
};
#endif // ALPHANUMSORTPROXYMODEL_H