gcp/arrow.h

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// -*- C++ -*-

/*
 * GChemPaint library
 * arrow.h
 *
 * Copyright (C) 2002-2012 Jean Bréfort <jean.brefort@normalesup.org>
 *
 * 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 3 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 St, Fifth Floor, Boston, MA  02110-1301
 * USA
 */

#ifndef GCHEMPAINT_ARROW_H
#define GCHEMPAINT_ARROW_H

#include <gcu/object.h>
#include <gccv/item-client.h>

namespace gcp {

class Step;

enum ArrowTypes
{
        SimpleArrow,
        ReversibleArrow,
        FullReversibleArrow,
};

class Arrow: public gcu::Object, public gccv::ItemClient
{
public:
        Arrow(gcu::TypeId Type);
        virtual ~Arrow();

        bool Load (xmlNodePtr node);
        void SetSelected (int state);
        void SetCoords (double xstart, double ystart, double xend, double yend);
        bool GetCoords (double* xstart, double* ystart, double* xend, double* yend) const;
        bool GetCoords (double *x, double *y, double *z = NULL) const;
        void Move (double x, double y, double z = 0);
        void Transform2D (gcu::Matrix2D& m, double x, double y);
        double GetYAlign ();
        bool SetProperty (unsigned property, char const *value);
        void SetStartStep (Step *step) {m_Start = step;}
        Step** GetStartStepPtr () {return &m_Start;}
        Step* GetStartStep () const {return m_Start;}
        void SetEndStep (Step *step) {m_End = step;}
        Step* GetEndStep () const {return m_End;}
        Step** GetEndStepPtr () {return &m_End;}
        void Reverse ();
        void RemoveStep (Step *step);

protected:
        bool Save (xmlDocPtr xml, xmlNodePtr node) const;

        std::string Name ();

        void OnLoaded ();

protected:
        double m_x;
        double m_y;
        double m_width;
        double m_height;

private:
        Step *m_Start, *m_End;

GCU_RO_PROP (double, Length)
};

}       //      namespace gcp

#endif  //GCHEMPAINT_ARROW_H