inkscape/src/sp-marker.h

#ifndef SEEN_SP_MARKER_H
#define SEEN_SP_MARKER_H

/*
 * SVG <marker> implementation
 *
 * Authors:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *
 * Copyright (C) 1999-2003 Lauris Kaplinski
 * Copyright (C) 2008      Johan Engelen
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */
/*
 * This is quite similar in logic to <svg>
 * Maybe we should merge them somehow (Lauris)
 */

#define SP_TYPE_MARKER (sp_marker_get_type ())
#define SP_MARKER(obj) (dynamic_cast<SPMarker*>((SPObject*)obj))
#define SP_IS_MARKER(obj) (dynamic_cast<const SPMarker*>((SPObject*)obj) != NULL)

class SPMarkerView;

#include <map>

#include <2geom/rect.h>
#include <2geom/affine.h>

#include "enums.h"
#include "svg/svg-length.h"
#include "svg/svg-angle.h"
#include "sp-item-group.h"
#include "uri-references.h"
#include "viewbox.h"

enum markerOrient {
  MARKER_ORIENT_ANGLE,
  MARKER_ORIENT_AUTO,
  MARKER_ORIENT_AUTO_START_REVERSE
};

class SPMarker : public SPGroup, public SPViewBox {
public:
    SPMarker();
    virtual ~SPMarker();

    /* units */
    unsigned int markerUnits_set : 1;
    unsigned int markerUnits : 1;

    /* reference point */
    SVGLength refX;
    SVGLength refY;

    /* dimensions */
    SVGLength markerWidth;
    SVGLength markerHeight;

    /* orient */
    unsigned int orient_set : 1;
    markerOrient orient_mode : 2;
    SVGAngle orient;

    /* Private views indexed by key that corresponds to a
     * particular marker type (start, mid, end) on a particular
     * path. SPMarkerView is a wrapper for a vector of pointers to
     * Inkscape::DrawingItem instances, one pointer for each
     * rendered marker.
     */
    std::map<unsigned int, SPMarkerView> views_map;

    virtual void build(SPDocument *document, Inkscape::XML::Node *repr);
    virtual void release();
    virtual void set(unsigned int key, gchar const* value);
    virtual void update(SPCtx *ctx, guint flags);
    virtual Inkscape::XML::Node* write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags);

    virtual Inkscape::DrawingItem* show(Inkscape::Drawing &drawing, unsigned int key, unsigned int flags);
    virtual Inkscape::DrawingItem* private_show(Inkscape::Drawing &drawing, unsigned int key, unsigned int flags);
    virtual void hide(unsigned int key);

    virtual Geom::OptRect bbox(Geom::Affine const &transform, SPItem::BBoxType type) const;
    virtual void print(SPPrintContext *ctx);
};

class SPMarkerReference : public Inkscape::URIReference {
    SPMarkerReference(SPObject *obj) : URIReference(obj) {}
    SPMarker *getObject() const {
        return static_cast<SPMarker *>(URIReference::getObject());
    }
protected:
    virtual bool _acceptObject(SPObject *obj) const {
        return SP_IS_MARKER(obj) && URIReference::_acceptObject(obj);
    }
};

void sp_marker_show_dimension (SPMarker *marker, unsigned int key, unsigned int size);
Inkscape::DrawingItem *sp_marker_show_instance (SPMarker *marker, Inkscape::DrawingItem *parent,
                      unsigned int key, unsigned int pos,
                      Geom::Affine const &base, float linewidth);
void sp_marker_hide (SPMarker *marker, unsigned int key);
const char *generate_marker (std::vector<Inkscape::XML::Node*> &reprs, Geom::Rect bounds, SPDocument *document, Geom::Point center, Geom::Affine move);
SPObject *sp_marker_fork_if_necessary(SPObject *marker);

#endif