AbstractFilter.h

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/***************************************************************************
    File                 : AbstractFilter.h
    Project              : SciDAVis
    --------------------------------------------------------------------
    Copyright            : (C) 2007-2009 by Knut Franke, Tilman Benkert
    Email (use @ for *)  : knut.franke*gmx.de, thzs*gmx.net
    Description          : Base class for all analysis operations.

 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *  This program is free software; you can redistribute it and/or modify   *
 *  it under the terms of the GNU General Public License as published by   *
 *  the Free Software Foundation; either version 2 of the License, or      *
 *  (at your option) any later version.                                    *
 *                                                                         *
 *  This program 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 General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
 *   Boston, MA  02110-1301  USA                                           *
 *                                                                         *
 ***************************************************************************/
#ifndef ABSTRACT_FILTER_H
#define ABSTRACT_FILTER_H

#include "AbstractAspect.h"
#include "AbstractColumn.h"
#include <QVector>

class AbstractFilter : public AbstractAspect
{
    Q_OBJECT

    public:
        AbstractFilter(const QString& name) : AbstractAspect(name) {}
        virtual ~AbstractFilter() {}

        virtual int inputCount() const = 0;
        virtual int outputCount() const = 0;
        int highestConnectedInput() const { return d_inputs.count() - 1; }
        bool input(int port, const AbstractColumn* source);
        bool input(const AbstractFilter* sources);
        const AbstractColumn *input(int port) const { return d_inputs.value(port); }
        virtual QString inputLabel(int port) const;
        virtual AbstractColumn* output(int port=0) = 0;
        virtual const AbstractColumn* output(int port=0) const = 0;
        
        int portIndexOf(const AbstractColumn * column)
        {
            for(int i=0; i<d_inputs.size(); i++)
                if(d_inputs.at(i) == column) return i;
            return -1;
        }

    protected:
        virtual bool inputAcceptable(int port, const AbstractColumn *source) {
            Q_UNUSED(port); Q_UNUSED(source); return true;
        }
        virtual void inputAboutToBeDisconnected(const AbstractColumn * source) { Q_UNUSED(source); }

    protected slots:



        virtual void inputDescriptionAboutToChange(const AbstractColumn * source) { Q_UNUSED(source); } 
        void inputDescriptionAboutToChange(const AbstractAspect * aspect) {
            const AbstractColumn * col = qobject_cast<const AbstractColumn*>(aspect);
            if (col) inputDescriptionAboutToChange(col);
        }

        virtual void inputDescriptionChanged(const AbstractColumn * source) { Q_UNUSED(source); }
        void inputDescriptionChanged(const AbstractAspect * aspect) {
            const AbstractColumn * col = qobject_cast<const AbstractColumn*>(aspect);
            if (col && d_inputs.contains(col)) inputDescriptionChanged(col);
        }
        virtual void inputPlotDesignationAboutToChange(const AbstractColumn * source) { Q_UNUSED(source); }
;
        virtual void inputPlotDesignationChanged(const AbstractColumn * source) { Q_UNUSED(source); }
        virtual void inputModeAboutToChange(const AbstractColumn * source) { Q_UNUSED(source); }
        virtual void inputModeChanged(const AbstractColumn * source) { Q_UNUSED(source); }
        virtual void inputDataAboutToChange(const AbstractColumn * source) { Q_UNUSED(source); }
        virtual void inputDataChanged(const AbstractColumn * source) { Q_UNUSED(source); }
        virtual void inputAboutToBeReplaced(const AbstractColumn * source, const AbstractColumn* replacement);

        virtual void inputRowsAboutToBeInserted(const AbstractColumn * source, int before, int count) {
            Q_UNUSED(source); Q_UNUSED(before); Q_UNUSED(count);
        }
        virtual void inputRowsInserted(const AbstractColumn * source, int before, int count) {
            Q_UNUSED(source); Q_UNUSED(before); Q_UNUSED(count);
        }
        virtual void inputRowsAboutToBeRemoved(const AbstractColumn * source, int first, int count) {
            Q_UNUSED(source); Q_UNUSED(first); Q_UNUSED(count);
        }
        virtual void inputRowsRemoved(const AbstractColumn * source, int first, int count) {
            Q_UNUSED(source); Q_UNUSED(first); Q_UNUSED(count);
        }
        virtual void inputMaskingAboutToChange(const AbstractColumn * source) {
            Q_UNUSED(source);
        }
        virtual void inputMaskingChanged(const AbstractColumn * source) {
            Q_UNUSED(source);
        }
        void inputAboutToBeDestroyed(const AbstractColumn * source) {
            input(portIndexOf(source), 0);
        }

    protected:
        QVector<const AbstractColumn*> d_inputs;
};

#endif // ifndef ABSTRACT_FILTER_H