qabstractfilter.h

/******************************************************************************
** This file is part of qadvanceditemviews.
**
** Copyright (c) 2011-2012 Martin Hoppe martin@2x2hoppe.de
**
** qadvanceditemviews is free software: you can redistribute it
** and/or modify it under the terms of the GNU Lesser General
** Public License as published by the Free Software Foundation,
** either version 3 of the License, or (at your option) any
** later version.
**
** qadvanceditemviews is distributed in the hope that it will be
** useful, but WITHOUT ANY WARRANTY; without even the implied
** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
** See the GNU General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public
** License along with qadvanceditemviews.
** If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#ifndef QABSTRACTFILTER_H
#define QABSTRACTFILTER_H

#include <QMap>
#include <QMenu>
#include <QStyleOptionViewItem>
#include <QVariant>

#include <qaivlib_global.h>

class QFilterGroup;
class QFilterViewItemDelegate;
class QAbstractFilterPrivate;


class QAIVLIBSHARED_EXPORT QAbstractFilter
{
public:
        static const int UserType = 65536;
    enum {
        Type = -1        
    };
    QAbstractFilter();
    QAbstractFilter(const QMap<QString,QVariant> & properties);
    ~QAbstractFilter();
    int column() const;
    virtual void addContextMenuActions(QMenu *menu, QWidget *receiver);
    virtual QWidget* createEditor(QFilterViewItemDelegate* delegate, QWidget* parent, const QStyleOptionViewItem & option, const QModelIndex & index ) const = 0;
    virtual QVariant data(int role = Qt::DisplayRole) const = 0;
    QColor highlightColor() const;
    bool isEnabled() const;
    bool isValid() const;
    virtual bool matches(const QVariant & value, int type = -1) const = 0;
    QVariant property(const QString & key, const QVariant & defaultValue = QVariant()) const;
    QMap<QString,QVariant> properties() const;
    int row() const;
    virtual void setEditorData(QWidget * editor, const QModelIndex & index) = 0;
    void setHighlightColor(const QColor & color);

    virtual void setModelData(QWidget* editor, QAbstractItemModel * model, const QModelIndex & index) = 0;
    void setEnabled( bool on );
    void setProperty(const QString & name, const QVariant & value);
    int type() const;

        virtual void updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem & option, const QModelIndex & index) = 0;
protected:
    QAbstractFilter(int type, int row, int column);
private:
    friend class QAbstractFilterModel;
    void setRow(int row);

    QAbstractFilterPrivate* d;
};

template <class T> inline T qfilter_cast(QAbstractFilter* filter)
{
    return int(static_cast<T>(0)->Type) == int(QAbstractFilter::Type)
        || (filter && int(static_cast<T>(0)->Type) == filter->type()) ? static_cast<T>(filter) : 0;
}

template <class T> inline T qfilter_cast(const QAbstractFilter* filter)
{
    return int(static_cast<T>(0)->Type) == int(QAbstractFilter::Type)
        || (filter && int(static_cast<T>(0)->Type) == filter->type()) ? static_cast<T>(filter) : 0;
}

#endif // QABSTRACTFILTER_H