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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_KNOT_HOLDER_ENTITY_H
#define SEEN_KNOT_HOLDER_ENTITY_H
/*
* Authors:
* Mitsuru Oka <oka326@parkcity.ne.jp>
* Maximilian Albert <maximilian.albert@gmail.com>
*
* Copyright (C) 1999-2001 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
* Copyright (C) 2001 Mitsuru Oka
* Copyright (C) 2004 Monash University
* Copyright (C) 2008 Maximilian Albert
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <2geom/forward.h>
#include "display/sp-canvas-item.h"
#include "knot.h"
#include "snapper.h"
class SPHatch;
class SPItem;
class SPKnot;
class SPDesktop;
class SPPattern;
class KnotHolder;
namespace Inkscape {
namespace LivePathEffect {
class Effect;
} // namespace LivePathEffect
} // namespace Inkscape
typedef void (* SPKnotHolderSetFunc) (SPItem *item, Geom::Point const &p, Geom::Point const &origin, unsigned int state);
typedef Geom::Point (* SPKnotHolderGetFunc) (SPItem *item);
/**
* KnotHolderEntity definition.
*/
class KnotHolderEntity {
public:
KnotHolderEntity():
knot(nullptr),
item(nullptr),
desktop(nullptr),
parent_holder(nullptr),
my_counter(0),
handler_id(0),
_click_handler_id(0),
_ungrab_handler_id(0)
{}
virtual ~KnotHolderEntity();
virtual void create(SPDesktop *desktop, SPItem *item, KnotHolder *parent,
Inkscape::ControlType type = Inkscape::CTRL_TYPE_UNKNOWN,
char const*tip = "",
SPKnotShapeType shape = SP_KNOT_SHAPE_DIAMOND,
SPKnotModeType mode = SP_KNOT_MODE_XOR,
guint32 color = 0xffffff00);
/* the get/set/click handlers are virtual functions; each handler class for a knot
should be derived from KnotHolderEntity and override these functions */
virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) = 0;
virtual void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, unsigned int state) = 0;
virtual bool knot_missing() const { return false; }
virtual Geom::Point knot_get() const = 0;
virtual void knot_click(unsigned int /*state*/) {}
void update_knot();
//private:
Geom::Point snap_knot_position(Geom::Point const &p, unsigned int state);
Geom::Point snap_knot_position_constrained(Geom::Point const &p, Inkscape::Snapper::SnapConstraint const &constraint, unsigned int state);
SPKnot *knot;
SPItem *item;
SPDesktop *desktop;
KnotHolder *parent_holder;
int my_counter;
static int counter;
/** Connection to \a knot's "moved" signal. */
unsigned int handler_id;
/** Connection to \a knot's "clicked" signal. */
unsigned int _click_handler_id;
/** Connection to \a knot's "ungrabbed" signal. */
unsigned int _ungrab_handler_id;
private:
sigc::connection _mousedown_connection;
sigc::connection _moved_connection;
sigc::connection _click_connection;
sigc::connection _ungrabbed_connection;
};
// derived KnotHolderEntity class for LPEs
class LPEKnotHolderEntity : public KnotHolderEntity {
public:
LPEKnotHolderEntity(Inkscape::LivePathEffect::Effect *effect) : _effect(effect) {};
void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override;
protected:
Inkscape::LivePathEffect::Effect *_effect;
};
/* pattern manipulation */
class PatternKnotHolderEntity : public KnotHolderEntity {
public:
PatternKnotHolderEntity(bool fill) : KnotHolderEntity(), _fill(fill) {}
bool knot_missing() const override;
void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override{};
protected:
// true if the entity tracks fill, false for stroke
bool _fill;
SPPattern *_pattern() const;
};
class PatternKnotHolderEntityXY : public PatternKnotHolderEntity {
public:
PatternKnotHolderEntityXY(bool fill) : PatternKnotHolderEntity(fill) {}
Geom::Point knot_get() const override;
void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
};
class PatternKnotHolderEntityAngle : public PatternKnotHolderEntity {
public:
PatternKnotHolderEntityAngle(bool fill) : PatternKnotHolderEntity(fill) {}
Geom::Point knot_get() const override;
void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
};
class PatternKnotHolderEntityScale : public PatternKnotHolderEntity {
public:
PatternKnotHolderEntityScale(bool fill) : PatternKnotHolderEntity(fill) {}
Geom::Point knot_get() const override;
void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
};
/* Hatch manipulation */
class HatchKnotHolderEntity : public KnotHolderEntity {
public:
HatchKnotHolderEntity(bool fill)
: KnotHolderEntity()
, _fill(fill)
{
}
bool knot_missing() const override;
void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override{};
protected:
// true if the entity tracks fill, false for stroke
bool _fill;
SPHatch *_hatch() const;
};
class HatchKnotHolderEntityXY : public HatchKnotHolderEntity {
public:
HatchKnotHolderEntityXY(bool fill)
: HatchKnotHolderEntity(fill)
{
}
Geom::Point knot_get() const override;
void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
};
class HatchKnotHolderEntityAngle : public HatchKnotHolderEntity {
public:
HatchKnotHolderEntityAngle(bool fill)
: HatchKnotHolderEntity(fill)
{
}
Geom::Point knot_get() const override;
void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
};
class HatchKnotHolderEntityScale : public HatchKnotHolderEntity {
public:
HatchKnotHolderEntityScale(bool fill)
: HatchKnotHolderEntity(fill)
{
}
Geom::Point knot_get() const override;
void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
};
/* Filter manipulation */
class FilterKnotHolderEntity : public KnotHolderEntity {
public:
FilterKnotHolderEntity(bool topleft) : KnotHolderEntity(), _topleft(topleft) {}
Geom::Point knot_get() const override;
void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override {};
void knot_set(Geom::Point const &p, Geom::Point const &origin, unsigned int state) override;
private:
bool _topleft; // true for topleft point, false for bottomright
};
#endif /* !SEEN_KNOT_HOLDER_ENTITY_H */
/*
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:textwidth=99 :
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