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/** \file
 * A class for handling shape interaction with libavoid.
 * Authors:
 *   Michael Wybrow <mjwybrow@users.sourceforge.net>
 * Copyright (C) 2005 Michael Wybrow
 * Released under GNU GPL, read the file 'COPYING' for more information

#include <glib/gslist.h>
#include <stddef.h>
#include <sigc++/connection.h>

struct SPDesktop;
struct SPItem;
struct ConnectionPoint;
typedef std::map<int, ConnectionPoint> IdConnectionPointMap;
00024 namespace Avoid { class ShapeRef; }

00026 class SPAvoidRef {
    SPAvoidRef(SPItem *spitem);
    virtual ~SPAvoidRef();

    // libavoid's internal representation of the item.
    Avoid::ShapeRef *shapeRef;

    // Used for holding connection points for item
    IdConnectionPointMap connection_points;

    void setAvoid(char const *value);
    void setConnectionPoints(gchar const *value);
    void addConnectionPoint(ConnectionPoint &cp);
    void updateConnectionPoint(ConnectionPoint &cp);
    void deleteConnectionPoint(ConnectionPoint &cp);
    void handleSettingChange(void);

    // Returns a list of SPItems of all connectors/shapes attached to
    // this object.  Pass one of the following for 'type':
    //     Avoid::runningTo
    //     Avoid::runningFrom
    //     Avoid::runningToAndFrom
    GSList *getAttachedShapes(const unsigned int type);
    GSList *getAttachedConnectors(const unsigned int type);
    Geom::Point getConnectionPointPos(const int type, const int id);

    bool isValidConnPointId( const int type, const int id );

    SPItem *item;

    // true if avoiding, false if not.
    bool setting;
    bool new_setting;

    // A sigc connection for transformed signal.
    sigc::connection _transformed_connection;
    void setConnectionPointsAttrUndoable(const gchar* value, const gchar* action);

extern GSList *get_avoided_items(GSList *list, SPObject *from,
        SPDesktop *desktop, bool initialised = true);
extern void avoid_item_move(Geom::Matrix const *mp, SPItem *moved_item);
extern void init_avoided_shape_geometry(SPDesktop *desktop);

static const double defaultConnSpacing = 3.0;
static const double defaultConnCurvature = 3.0;

#endif /* !SEEN_CONN_AVOID_REF */

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