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// SPDX-License-Identifier: GPL-2.0-or-later
/**
* SVG <ellipse> and related implementations
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Mitsuru Oka
* Tavmjong Bah
*
* Copyright (C) 1999-2002 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
* Copyright (C) 2013 Tavmjong Bah
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_SP_ELLIPSE_H
#define SEEN_SP_ELLIPSE_H
#include "svg/svg-length.h"
#include "sp-shape.h"
enum GenericEllipseType {
SP_GENERIC_ELLIPSE_UNDEFINED, // FIXME shouldn't exist
SP_GENERIC_ELLIPSE_ARC,
SP_GENERIC_ELLIPSE_CIRCLE,
SP_GENERIC_ELLIPSE_ELLIPSE
};
enum GenericEllipseArcType {
SP_GENERIC_ELLIPSE_ARC_TYPE_SLICE, // Default
SP_GENERIC_ELLIPSE_ARC_TYPE_ARC,
SP_GENERIC_ELLIPSE_ARC_TYPE_CHORD
};
class SPGenericEllipse : public SPShape {
public:
SPGenericEllipse();
~SPGenericEllipse() override;
// Regardless of type, the ellipse/circle/arc is stored
// internally with these variables. (Circle radius is rx).
SVGLength cx;
SVGLength cy;
SVGLength rx;
SVGLength ry;
// Return slice, chord, or arc.
GenericEllipseArcType arcType() { return arc_type; };
void setArcType(GenericEllipseArcType type) { arc_type = type; };
double start, end;
GenericEllipseType type;
GenericEllipseArcType arc_type;
void tag_name_changed(gchar const* oldname, gchar const* newname) override;
void build(SPDocument *document, Inkscape::XML::Node *repr) override;
void set(SPAttr key, char const *value) override;
void update(SPCtx *ctx, unsigned int flags) override;
Inkscape::XML::Node *write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, unsigned int flags) override;
const char *typeName() const override;
const char *displayName() const override;
void set_shape() override;
void update_patheffect(bool write) override;
Geom::Affine set_transform(Geom::Affine const &xform) override;
void snappoints(std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs) const override;
void modified(unsigned int flags) override;
/**
* @brief Makes sure that start and end lie between 0 and 2 * PI.
*/
void normalize();
Geom::Point getPointAtAngle(double arg) const;
bool set_elliptical_path_attribute(Inkscape::XML::Node *repr);
void position_set(double x, double y, double rx, double ry);
double getVisibleRx() const;
void setVisibleRx(double rx);
double getVisibleRy() const;
void setVisibleRy(double ry);
protected:
/**
* @brief Determines whether the shape is a part of an ellipse.
*/
bool _isSlice() const;
private:
static double vectorStretch(Geom::Point p0, Geom::Point p1, Geom::Affine xform);
};
MAKE_SP_OBJECT_DOWNCAST_FUNCTIONS(SP_GENERICELLIPSE, SPGenericEllipse)
MAKE_SP_OBJECT_TYPECHECK_FUNCTIONS(SP_IS_GENERICELLIPSE, SPGenericEllipse)
#endif
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8 :
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